Linux企业应用——Docker（五）之Docker网络
文章目录
- 一、三种原生网络
-
- 1.bridge桥接模式
- 2.host模式
- 3.none模式
- 二、Docker自定义网络
-
- 1.创建
- 2.容器互访
- 3.自定义网络，设置自定义网段和网关
- 4.创建容器自定义ip
- 三、容器的通信
-
- 1.Joined容器
- 2. --link
- 三、跨主机网络通信
-
- macvlan网络方案实现
清除所有的不用的镜像、容器、数据卷、网络
dcoekr system prune
一、三种原生网络
[root@k8s2 harbor]# docker network ls
NETWORK ID NAME DRIVER SCOPE
696489daaaf3 bridge bridge local
daf109ce4ab0 host host local
41928efc6031 none null local
1.bridge桥接模式
• bridge模式下容器没有一个公有ip，只有宿主机可以直接访问，外部主机
是不可见的。
• 容器通过宿主机的NAT规则后可以访问外网。
[root@k8s2 harbor]# docker run -it --rm busybox
/ # ip addr
1: lo: ,UP,LOWER_UP> mtu 65536 qdisc noqueue qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
23: eth0@if24: ,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 1500 qdisc noqueue
link/ether 02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.2/16 brd 172.17.255.255 scope global eth0
valid_lft forever preferred_lft forever
yum install -y bridge-utils
docker安装时会创建一个名为 docker0 的Linux bridge，新建的容器
会自动桥接到这个接口。
[root@k8s2 harbor]# brctl show
bridge name bridge id STP enabled interfaces
docker0 8000.02425d314189 no
[root@k8s2 harbor]# ip addr
1: lo: ,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
2: eth0: ,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether 00:16:3e:09:e9:3a brd ff:ff:ff:ff:ff:ff
inet 172.27.84.9/20 brd 172.27.95.255 scope global dynamic eth0
valid_lft 315359423sec preferred_lft 315359423sec
3: docker0: ,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:5d:31:41:89 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
valid_lft forever preferred_lft forever
防火墙策略查看
[root@k8s2 harbor]# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy DROP)
target prot opt source destination
DOCKER-USER all -- anywhere anywhere
DOCKER-ISOLATION-STAGE-1 all -- anywhere anywhere
ACCEPT all -- anywhere anywhere ctstate RELATED,ESTABLISHED
DOCKER all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
ACCEPT all -- anywhere anywhere
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
Chain DOCKER (1 references)
target prot opt source destination
Chain DOCKER-ISOLATION-STAGE-1 (1 references)
target prot opt source destination
DOCKER-ISOLATION-STAGE-2 all -- anywhere anywhere
RETURN all -- anywhere anywhere
Chain DOCKER-ISOLATION-STAGE-2 (1 references)
target prot opt source destination
DROP all -- anywhere anywhere
RETURN all -- anywhere anywhere
Chain DOCKER-USER (1 references)
target prot opt source destination
RETURN all -- anywhere anywhere
[root@k8s2 harbor]# docker run -d --name vm1 nginx
69935dabfb2a1f059b8ed97c7a2da1c58825a7bdc4edc84f79b2e55eff950d99
[root@k8s2 harbor]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
69935dabfb2a nginx "/docker-entrypoint.…" 4 seconds ago Up 3 seconds 80/tcp vm1
[root@k8s2 harbor]# docker inspect vm1|grep Pid
"Pid": 11664,
"PidMode": "",
"PidsLimit": null,
[root@k8s2 harbor]# cd /proc/11664
[root@k8s2 11664]# ls
attr cmdline environ io mem ns pagemap sched stack task
autogroup comm exe limits mountinfo numa_maps patch_state schedstat stat timers
auxv coredump_filter fd loginuid mounts oom_adj personality sessionid statm uid_map
cgroup cpuset fdinfo map_files mountstats oom_score projid_map setgroups status wchan
clear_refs cwd gid_map maps net oom_score_adj root smaps syscall
[root@k8s2 11664]# cd ns/
[root@k8s2 ns]# ls
ipc mnt net pid user uts
docker inspect vm1可查看vm1容器被分配到ip地址
宿主机可以直接访问，但其他主机不能访问
[root@k8s2 ns]# curl 172.17.0.2
<!DOCTYPE html>
Welcome to nginx!<<span class="token operator">/</span>title>
<style>
html <span class="token punctuation">{</span> color-scheme: light dark<span class="token punctuation">;</span> <span class="token punctuation">}</span>
body <span class="token punctuation">{</span> width: 35em<span class="token punctuation">;</span> margin: 0 auto<span class="token punctuation">;</span>
font-family: Tahoma<span class="token punctuation">,</span> Verdana<span class="token punctuation">,</span> Arial<span class="token punctuation">,</span> sans-serif<span class="token punctuation">;</span> <span class="token punctuation">}</span>
<<span class="token operator">/</span>style>
<<span class="token operator">/</span>head>
<body>
<h1>Welcome to nginx!<<span class="token operator">/</span>h1>
<p><span class="token keyword">If</span> you see this page<span class="token punctuation">,</span> the nginx web server is successfully installed and
working<span class="token punctuation">.</span> Further configuration is required<span class="token punctuation">.</span><<span class="token operator">/</span>p>
<p><span class="token keyword">For</span> online documentation and support please refer to
<a href=<span class="token string">"http://nginx.org/"</span>>nginx<span class="token punctuation">.</span>org<<span class="token operator">/</span>a><span class="token punctuation">.</span><br/>
Commercial support is available at
<a href=<span class="token string">"http://nginx.com/"</span>>nginx<span class="token punctuation">.</span>com<<span class="token operator">/</span>a><span class="token punctuation">.</span><<span class="token operator">/</span>p>
<p><em>Thank you <span class="token keyword">for</span> <span class="token keyword">using</span> nginx<span class="token punctuation">.</span><<span class="token operator">/</span>em><<span class="token operator">/</span>p>
<<span class="token operator">/</span>body>
<<span class="token operator">/</span>html>
</code></pre>
<h2>2.host模式</h2>
<p>host模式可以让容器共享宿主机网络栈，这样的好处是外部主机与容<br> 器直接通信，但是容器的网络缺少隔离性。<br> <a href="http://img.e-com-net.com/image/info8/33ea345691f14356be116efbb2b55790.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/33ea345691f14356be116efbb2b55790.jpg" alt="Linux企业应用——Docker（五）之Docker网络_第3张图片" width="650" height="533" style="border:1px solid black;"></a></p>
<p><code>docker inspect vm2</code>vm2没有被分到IP地址，因为它和宿主机<mark>共享网络栈</mark></p>
<p><a href="http://img.e-com-net.com/image/info8/269ffa78b17f4e089ed6be5582496a11.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/269ffa78b17f4e089ed6be5582496a11.jpg" alt="Linux企业应用——Docker（五）之Docker网络_第4张图片" width="650" height="609" style="border:1px solid black;"></a></p>
<p>使用<mark>其他主机</mark><code>curl 172.27.86.9</code>访问该宿主机，能直接到达vm2容器</p>
<p><a href="http://img.e-com-net.com/image/info8/9a869e2e5ff74af79d7545f545d876bf.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/9a869e2e5ff74af79d7545f545d876bf.jpg" alt="Linux企业应用——Docker（五）之Docker网络_第5张图片" width="650" height="515" style="border:1px solid black;"></a><br> 弊端，当创建多个容器时，<mark>容器运行起冲突</mark></p>
<pre><code class="prism language-powershell"><span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker run -d --name vm3 --network host nginx</span>
98791f547c93cdf385e3488d74b721cd946526bd0d0827fa8bc0806acc9c3a14
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker ps</span>
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
8879ed66ee64 nginx <span class="token string">"/docker-entrypoint.…"</span> About a minute ago Up About a minute vm2
</code></pre>
<p><code>docker logs vm3</code>端口80冲突<br> <a href="http://img.e-com-net.com/image/info8/9740646b683546aaa033fa1777dd0de2.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/9740646b683546aaa033fa1777dd0de2.jpg" alt="Linux企业应用——Docker（五）之Docker网络_第6张图片" width="650" height="518" style="border:1px solid black;"></a></p>
<h2>3.none模式</h2>
<p>none模式是指禁用网络功能，只有lo接口，在容器创建时使用–network=none指定。<br> 主要用来做网络隔离，在容器内存储密钥之类。</p>
<pre><code class="prism language-powershell"><span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker run -it --rm --network none busybox</span>
<span class="token operator">/</span> <span class="token comment"># ip addr</span>
1: lo: <LOOPBACK<span class="token punctuation">,</span>UP<span class="token punctuation">,</span>LOWER_UP> mtu 65536 qdisc noqueue qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1/8 scope host lo
valid_lft forever preferred_lft forever
<span class="token operator">/</span> <span class="token comment">#</span>
</code></pre>
<h1>二、Docker自定义网络</h1>
<h2>1.创建</h2>
<pre><code class="prism language-powershell">
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker run -d --name vm1 nginx</span>
f8a491eb153f8e8482165f7ee3188fd97fae1c8698adefa6bcb39ea0b13337dc
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker run -d --name vm2 nginx</span>
3673ada86dfc0c52af1d8711811b78ac64473e067fdc09608f2557d52050eff9
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker ps</span>
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
3673ada86dfc nginx <span class="token string">"/docker-entrypoint.…"</span> 2 seconds ago Up 2 seconds 80/tcp vm2
f8a491eb153f nginx <span class="token string">"/docker-entrypoint.…"</span> 6 seconds ago Up 5 seconds 80/tcp vm1
</code></pre>
<p><a href="http://img.e-com-net.com/image/info8/5b140aac9a6b41c2bb75725286994066.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/5b140aac9a6b41c2bb75725286994066.jpg" alt="Linux企业应用——Docker（五）之Docker网络_第7张图片" width="650" height="871" style="border:1px solid black;"></a></p>
<p><a href="http://img.e-com-net.com/image/info8/de88ecc12f2d44719d701a1db7a8311b.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/de88ecc12f2d44719d701a1db7a8311b.jpg" alt="Linux企业应用——Docker（五）之Docker网络_第8张图片" width="650" height="667" style="border:1px solid black;"></a><br> 容器的ip地址是流动的，关闭又启动后的<mark>地址分配</mark>，是单调递增的</p>
<pre><code class="prism language-powershell">
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker stop vm1</span>
vm1
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker stop vm2</span>
vm2
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker start vm2</span>
vm2
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker start vm1</span>
vm1
</code></pre>
<p><a href="http://img.e-com-net.com/image/info8/428c0b3904cc47b9816ff332a0b3ecc7.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/428c0b3904cc47b9816ff332a0b3ecc7.jpg" alt="Linux企业应用——Docker（五）之Docker网络_第9张图片" width="650" height="498" style="border:1px solid black;"></a><br> <a href="http://img.e-com-net.com/image/info8/640a8769eb6d4725b82327d6047071ff.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/640a8769eb6d4725b82327d6047071ff.jpg" alt="Linux企业应用——Docker（五）之Docker网络_第10张图片" width="650" height="473" style="border:1px solid black;"></a><br> 创建一个自己的网络mynet1</p>
<pre><code class="prism language-powershell"><span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker network create mynet1</span>
7b3f43033e18c7fe601b4467d44f21ee38e6fe1fff53056c2140cd36f7f74984
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker network ls</span>
NETWORK ID NAME DRIVER SCOPE
696489daaaf3 bridge bridge local
daf109ce4ab0 host host local
7b3f43033e18 mynet1 bridge local
41928efc6031 none null local
</code></pre>
<p><mark>可以发现容器内内嵌DNS，这为容器互访带来了便利</mark></p>
<pre><code class="prism language-powershell">
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker run -it --rm --name vm3 --network mynet1 busybox</span>
<span class="token operator">/</span> <span class="token comment"># ip addr</span>
1: lo: <LOOPBACK<span class="token punctuation">,</span>UP<span class="token punctuation">,</span>LOWER_UP> mtu 65536 qdisc noqueue qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1/8 scope host lo
valid_lft forever preferred_lft forever
38: eth0@if39: <BROADCAST<span class="token punctuation">,</span>MULTICAST<span class="token punctuation">,</span>UP<span class="token punctuation">,</span>LOWER_UP<span class="token punctuation">,</span>M-DOWN> mtu 1500 qdisc noqueue
link/ether 02:42:<span class="token function">ac</span>:12:00:02 brd ff:ff:ff:ff:ff:ff
inet 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2/16 brd 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>255<span class="token punctuation">.</span>255 scope global eth0
valid_lft forever preferred_lft forever
<span class="token operator">/</span> <span class="token comment"># ping vm3</span>
PING vm3 <span class="token punctuation">(</span>172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2<span class="token punctuation">)</span>: 56 <span class="token keyword">data</span> bytes
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=0 ttl=64 time=0<span class="token punctuation">.</span>051 ms
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=1 ttl=64 time=0<span class="token punctuation">.</span>085 ms
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=2 ttl=64 time=0<span class="token punctuation">.</span>076 ms
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=3 ttl=64 time=0<span class="token punctuation">.</span>079 ms
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=4 ttl=64 time=0<span class="token punctuation">.</span>073 ms
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=5 ttl=64 time=0<span class="token punctuation">.</span>079 ms
^C
<span class="token operator">--</span><span class="token operator">-</span> vm3 ping statistics <span class="token operator">--</span><span class="token operator">-</span>
6 packets transmitted<span class="token punctuation">,</span> 6 packets received<span class="token punctuation">,</span> 0% packet loss
round-trip min/avg/max = 0<span class="token punctuation">.</span>051/0<span class="token punctuation">.</span>073/0<span class="token punctuation">.</span>085 ms
<span class="token operator">/</span> <span class="token comment"># cat /etc/hosts</span>
127<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2 ff96ef344507
</code></pre>
<h2>2.容器互访</h2>
<pre><code class="prism language-powershell">
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker run -it --rm --name vm3 --network mynet1 busybox</span>
<span class="token operator">/</span> <span class="token comment"># ip addr</span>
1: lo: <LOOPBACK<span class="token punctuation">,</span>UP<span class="token punctuation">,</span>LOWER_UP> mtu 65536 qdisc noqueue qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1/8 scope host lo
valid_lft forever preferred_lft forever
42: eth0@if43: <BROADCAST<span class="token punctuation">,</span>MULTICAST<span class="token punctuation">,</span>UP<span class="token punctuation">,</span>LOWER_UP<span class="token punctuation">,</span>M-DOWN> mtu 1500 qdisc noqueue
link/ether 02:42:<span class="token function">ac</span>:12:00:03 brd ff:ff:ff:ff:ff:ff
inet 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>3/16 brd 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>255<span class="token punctuation">.</span>255 scope global eth0
valid_lft forever preferred_lft forever
<span class="token operator">/</span> <span class="token comment"># ping web1</span>
PING web1 <span class="token punctuation">(</span>172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2<span class="token punctuation">)</span>: 56 <span class="token keyword">data</span> bytes
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=0 ttl=64 time=0<span class="token punctuation">.</span>102 ms
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=1 ttl=64 time=0<span class="token punctuation">.</span>104 ms
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=2 ttl=64 time=0<span class="token punctuation">.</span>098 ms
^C
<span class="token operator">--</span><span class="token operator">-</span> web1 ping statistics <span class="token operator">--</span><span class="token operator">-</span>
3 packets transmitted<span class="token punctuation">,</span> 3 packets received<span class="token punctuation">,</span> 0% packet loss
round-trip min/avg/max = 0<span class="token punctuation">.</span>098/0<span class="token punctuation">.</span>101/0<span class="token punctuation">.</span>104 ms
<span class="token operator">/</span> <span class="token comment"># cat /etc/hosts</span>
127<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>3 3d3a46782051
<span class="token operator">/</span> <span class="token comment"># exit</span>
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker run -it --rm --name vm3 --network mynet1 busyboxplus</span>
<span class="token operator">/</span> <span class="token comment"># ip addr</span>
1: lo: <LOOPBACK<span class="token punctuation">,</span>UP<span class="token punctuation">,</span>LOWER_UP> mtu 65536 qdisc noqueue qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1/8 scope host lo
valid_lft forever preferred_lft forever
44: eth0@if45: <BROADCAST<span class="token punctuation">,</span>MULTICAST<span class="token punctuation">,</span>UP<span class="token punctuation">,</span>LOWER_UP<span class="token punctuation">,</span>M-DOWN> mtu 1500 qdisc noqueue
link/ether 02:42:<span class="token function">ac</span>:12:00:03 brd ff:ff:ff:ff:ff:ff
inet 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>3/16 brd 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>255<span class="token punctuation">.</span>255 scope global eth0
valid_lft forever preferred_lft forever
<span class="token operator">/</span> <span class="token comment"># curl web1</span>
<<span class="token operator">!</span>DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!<<span class="token operator">/</span>title>
<style>
html <span class="token punctuation">{</span> color-scheme: light dark<span class="token punctuation">;</span> <span class="token punctuation">}</span>
body <span class="token punctuation">{</span> width: 35em<span class="token punctuation">;</span> margin: 0 auto<span class="token punctuation">;</span>
font-family: Tahoma<span class="token punctuation">,</span> Verdana<span class="token punctuation">,</span> Arial<span class="token punctuation">,</span> sans-serif<span class="token punctuation">;</span> <span class="token punctuation">}</span>
<<span class="token operator">/</span>style>
<<span class="token operator">/</span>head>
<body>
<h1>Welcome to nginx!<<span class="token operator">/</span>h1>
<p><span class="token keyword">If</span> you see this page<span class="token punctuation">,</span> the nginx web server is successfully installed and
working<span class="token punctuation">.</span> Further configuration is required<span class="token punctuation">.</span><<span class="token operator">/</span>p>
<p><span class="token keyword">For</span> online documentation and support please refer to
<a href=<span class="token string">"http://nginx.org/"</span>>nginx<span class="token punctuation">.</span>org<<span class="token operator">/</span>a><span class="token punctuation">.</span><br/>
Commercial support is available at
<a href=<span class="token string">"http://nginx.com/"</span>>nginx<span class="token punctuation">.</span>com<<span class="token operator">/</span>a><span class="token punctuation">.</span><<span class="token operator">/</span>p>
<p><em>Thank you <span class="token keyword">for</span> <span class="token keyword">using</span> nginx<span class="token punctuation">.</span><<span class="token operator">/</span>em><<span class="token operator">/</span>p>
<<span class="token operator">/</span>body>
<<span class="token operator">/</span>html>
<span class="token operator">/</span> <span class="token comment">#</span>
</code></pre>
<h2>3.自定义网络，设置自定义网段和网关</h2>
<p><code>--subnet</code>参数设置网段，<code>--gateway</code>设置网关</p>
<pre><code class="prism language-powershell">
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker network create --subnet 30.0.0.0/24 --gateway 30.0.0.1 mynet2</span>
ff3d3c3e9d0284f0a96643398f0d41e23e5bd03bff4ee9438398349c4ebe532d
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker inspect mynet2</span>
<span class="token punctuation">[</span>
<span class="token punctuation">{</span>
<span class="token string">"Name"</span>: <span class="token string">"mynet2"</span><span class="token punctuation">,</span>
<span class="token string">"Id"</span>: <span class="token string">"ff3d3c3e9d0284f0a96643398f0d41e23e5bd03bff4ee9438398349c4ebe532d"</span><span class="token punctuation">,</span>
<span class="token string">"Created"</span>: <span class="token string">"2022-11-04T15:39:31.816320337+08:00"</span><span class="token punctuation">,</span>
<span class="token string">"Scope"</span>: <span class="token string">"local"</span><span class="token punctuation">,</span>
<span class="token string">"Driver"</span>: <span class="token string">"bridge"</span><span class="token punctuation">,</span>
<span class="token string">"EnableIPv6"</span>: false<span class="token punctuation">,</span>
<span class="token string">"IPAM"</span>: <span class="token punctuation">{</span>
<span class="token string">"Driver"</span>: <span class="token string">"default"</span><span class="token punctuation">,</span>
<span class="token string">"Options"</span>: <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token string">"Config"</span>: <span class="token punctuation">[</span>
<span class="token punctuation">{</span>
<span class="token string">"Subnet"</span>: <span class="token string">"30.0.0.0/24"</span><span class="token punctuation">,</span>
<span class="token string">"Gateway"</span>: <span class="token string">"30.0.0.1"</span>
<span class="token punctuation">}</span>
<span class="token punctuation">]</span>
<span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token string">"Internal"</span>: false<span class="token punctuation">,</span>
<span class="token string">"Attachable"</span>: false<span class="token punctuation">,</span>
<span class="token string">"Ingress"</span>: false<span class="token punctuation">,</span>
<span class="token string">"ConfigFrom"</span>: <span class="token punctuation">{</span>
<span class="token string">"Network"</span>: <span class="token string">""</span>
<span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token string">"ConfigOnly"</span>: false<span class="token punctuation">,</span>
<span class="token string">"Containers"</span>: <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token string">"Options"</span>: <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token string">"Labels"</span>: <span class="token punctuation">{</span><span class="token punctuation">}</span>
<span class="token punctuation">}</span>
<span class="token punctuation">]</span>
</code></pre>
<h2>4.创建容器自定义ip</h2>
<p>• 使用<code>--ip参数</code>可以指定容器ip地址，但必须是在自定义网桥上，默认的bridge模式不支持，同一网桥上的容器是可以互通的。</p>
<pre><code class="prism language-powershell">
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker run -it --rm --name vm3 --network mynet2 --ip 30.0.0.126 busyboxplus</span>
<span class="token operator">/</span> <span class="token comment"># ping 30.0.0.1</span>
PING 30<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1 <span class="token punctuation">(</span>30<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1<span class="token punctuation">)</span>: 56 <span class="token keyword">data</span> bytes
64 bytes <span class="token keyword">from</span> 30<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1: seq=0 ttl=64 time=0<span class="token punctuation">.</span>107 ms
^C
<span class="token operator">--</span><span class="token operator">-</span> 30<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1 ping statistics <span class="token operator">--</span><span class="token operator">-</span>
1 packets transmitted<span class="token punctuation">,</span> 1 packets received<span class="token punctuation">,</span> 0% packet loss
round-trip min/avg/max = 0<span class="token punctuation">.</span>107/0<span class="token punctuation">.</span>107/0<span class="token punctuation">.</span>107 ms
</code></pre>
<p>web1和vm3属于不同网桥，所以不互通</p>
<pre><code class="prism language-powershell"><span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker run -it --rm --name vm3 --network mynet2 --ip 30.0.0.126 busyboxplus</span>
<span class="token operator">/</span> <span class="token comment"># ping web1</span>
ping: bad address <span class="token string">'web1'</span>
</code></pre>
<p>如何实现不同网桥互通？</p>
<p><a href="http://img.e-com-net.com/image/info8/f0f41ee62cad4d4ea11aa8e238c9f4e1.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/f0f41ee62cad4d4ea11aa8e238c9f4e1.jpg" alt="Linux企业应用——Docker（五）之Docker网络_第11张图片" width="650" height="545" style="border:1px solid black;"></a><br> Ctrl+p+q将容器打入后台<br> <code>docker network connect mynet1 vm3</code>给容器再添加一块mynet1的网卡</p>
<pre><code class="prism language-powershell"><span class="token operator">/</span> <span class="token comment"># [root@k8s2 ns]# docker ps</span>
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
d90a71b34cd1 busyboxplus <span class="token string">"/bin/sh"</span> 2 minutes ago Up 2 minutes vm3
f37215297f66 nginx <span class="token string">"/docker-entrypoint.…"</span> 8 minutes ago Up 8 minutes 80/tcp web1
3673ada86dfc nginx <span class="token string">"/docker-entrypoint.…"</span> 16 minutes ago Up 14 minutes 80/tcp vm2
f8a491eb153f nginx <span class="token string">"/docker-entrypoint.…"</span> 16 minutes ago Up 14 minutes 80/tcp vm1
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker network connect mynet1 vm3</span>
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker attach vm3</span>
<span class="token operator">/</span> <span class="token comment"># ip addr</span>
1: lo: <LOOPBACK<span class="token punctuation">,</span>UP<span class="token punctuation">,</span>LOWER_UP> mtu 65536 qdisc noqueue qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1/8 scope host lo
valid_lft forever preferred_lft forever
47: eth0@if48: <BROADCAST<span class="token punctuation">,</span>MULTICAST<span class="token punctuation">,</span>UP<span class="token punctuation">,</span>LOWER_UP<span class="token punctuation">,</span>M-DOWN> mtu 1500 qdisc noqueue
link/ether 02:42:1e:00:00:7e brd ff:ff:ff:ff:ff:ff
inet 30<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>126/24 brd 30<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>255 scope global eth0
valid_lft forever preferred_lft forever
49: eth1@if50: <BROADCAST<span class="token punctuation">,</span>MULTICAST<span class="token punctuation">,</span>UP<span class="token punctuation">,</span>LOWER_UP<span class="token punctuation">,</span>M-DOWN> mtu 1500 qdisc noqueue
link/ether 02:42:<span class="token function">ac</span>:12:00:03 brd ff:ff:ff:ff:ff:ff
inet 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>3/16 brd 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>255<span class="token punctuation">.</span>255 scope global eth1
valid_lft forever preferred_lft forever
<span class="token operator">/</span> <span class="token comment"># ping web1</span>
PING web1 <span class="token punctuation">(</span>172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2<span class="token punctuation">)</span>: 56 <span class="token keyword">data</span> bytes
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=0 ttl=64 time=0<span class="token punctuation">.</span>112 ms
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=1 ttl=64 time=0<span class="token punctuation">.</span>103 ms
^C
<span class="token operator">--</span><span class="token operator">-</span> web1 ping statistics <span class="token operator">--</span><span class="token operator">-</span>
2 packets transmitted<span class="token punctuation">,</span> 2 packets received<span class="token punctuation">,</span> 0% packet loss
round-trip min/avg/max = 0<span class="token punctuation">.</span>103/0<span class="token punctuation">.</span>107/0<span class="token punctuation">.</span>112 ms
<span class="token operator">/</span> <span class="token comment">#</span>
</code></pre>
<h1>三、容器的通信</h1>
<p>容器之间除了使用ip通信外，还可以使用容器名称通信。<br> • docker 1.10开始，内嵌了一个DNS server。<br> • dns解析功能必须在自定义网络中使用。<br> • 启动容器时使用 --name 参数指定容器名称</p>
<h2>1.Joined容器</h2>
<p>Joined容器一种较为特别的网络模式。处于这个模式下的 Docker 容器会共享一个网络栈，这样两个容器之<br> 间可以使用localhost高效快速通信。</p>
<p><a href="http://img.e-com-net.com/image/info8/5c2fde2d33fb4ae2a89f771a5da6a045.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/5c2fde2d33fb4ae2a89f771a5da6a045.jpg" alt="Linux企业应用——Docker（五）之Docker网络_第12张图片" width="632" height="521" style="border:1px solid black;"></a><br> • 在容器创建时使用<code>--network=container:vm1</code>指定。（vm1指定的是运行的容器名）</p>
<pre><code class="prism language-powershell">
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker run -it --name vm1 --network container:web1 busyboxplus</span>
<span class="token operator">/</span> <span class="token comment"># ip addr</span>
1: lo: <LOOPBACK<span class="token punctuation">,</span>UP<span class="token punctuation">,</span>LOWER_UP> mtu 65536 qdisc noqueue qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1/8 scope host lo
valid_lft forever preferred_lft forever
40: eth0@if41: <BROADCAST<span class="token punctuation">,</span>MULTICAST<span class="token punctuation">,</span>UP<span class="token punctuation">,</span>LOWER_UP<span class="token punctuation">,</span>M-DOWN> mtu 1500 qdisc noqueue
link/ether 02:42:<span class="token function">ac</span>:12:00:02 brd ff:ff:ff:ff:ff:ff
inet 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2/16 brd 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>255<span class="token punctuation">.</span>255 scope global eth0
valid_lft forever preferred_lft forever
<span class="token operator">/</span> <span class="token comment"># ping web1</span>
PING web1 <span class="token punctuation">(</span>172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2<span class="token punctuation">)</span>: 56 <span class="token keyword">data</span> bytes
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=0 ttl=64 time=0<span class="token punctuation">.</span>048 ms
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>18<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=1 ttl=64 time=0<span class="token punctuation">.</span>080 ms
^C
<span class="token operator">--</span><span class="token operator">-</span> web1 ping statistics <span class="token operator">--</span><span class="token operator">-</span>
2 packets transmitted<span class="token punctuation">,</span> 2 packets received<span class="token punctuation">,</span> 0% packet loss
round-trip min/avg/max = 0<span class="token punctuation">.</span>048/0<span class="token punctuation">.</span>064/0<span class="token punctuation">.</span>080 ms
<span class="token operator">/</span> <span class="token comment"># curl localhost</span>
<<span class="token operator">!</span>DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!<<span class="token operator">/</span>title>
<style>
html <span class="token punctuation">{</span> color-scheme: light dark<span class="token punctuation">;</span> <span class="token punctuation">}</span>
body <span class="token punctuation">{</span> width: 35em<span class="token punctuation">;</span> margin: 0 auto<span class="token punctuation">;</span>
font-family: Tahoma<span class="token punctuation">,</span> Verdana<span class="token punctuation">,</span> Arial<span class="token punctuation">,</span> sans-serif<span class="token punctuation">;</span> <span class="token punctuation">}</span>
<<span class="token operator">/</span>style>
<<span class="token operator">/</span>head>
<body>
<h1>Welcome to nginx!<<span class="token operator">/</span>h1>
<p><span class="token keyword">If</span> you see this page<span class="token punctuation">,</span> the nginx web server is successfully installed and
working<span class="token punctuation">.</span> Further configuration is required<span class="token punctuation">.</span><<span class="token operator">/</span>p>
<p><span class="token keyword">For</span> online documentation and support please refer to
<a href=<span class="token string">"http://nginx.org/"</span>>nginx<span class="token punctuation">.</span>org<<span class="token operator">/</span>a><span class="token punctuation">.</span><br/>
Commercial support is available at
<a href=<span class="token string">"http://nginx.com/"</span>>nginx<span class="token punctuation">.</span>com<<span class="token operator">/</span>a><span class="token punctuation">.</span><<span class="token operator">/</span>p>
<p><em>Thank you <span class="token keyword">for</span> <span class="token keyword">using</span> nginx<span class="token punctuation">.</span><<span class="token operator">/</span>em><<span class="token operator">/</span>p>
<<span class="token operator">/</span>body>
<<span class="token operator">/</span>html>
<span class="token operator">/</span> <span class="token comment">#</span>
</code></pre>
<h2>2. --link</h2>
<pre><code class="prism language-powershell">
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker run -d --name web1 nginx</span>
91c420704b24eeda1caebe7f33995a07b76c83dbb01184de22a6e803788188d1
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker ps</span>
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
91c420704b24 nginx <span class="token string">"/docker-entrypoint.…"</span> 5 seconds ago Up 4 seconds 80/tcp web1
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker run -it --name vm1 --link web1:nginx busyboxplus</span>
<span class="token operator">/</span> <span class="token comment"># ip addr</span>
1: lo: <LOOPBACK<span class="token punctuation">,</span>UP<span class="token punctuation">,</span>LOWER_UP> mtu 65536 qdisc noqueue qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1/8 scope host lo
valid_lft forever preferred_lft forever
57: eth0@if58: <BROADCAST<span class="token punctuation">,</span>MULTICAST<span class="token punctuation">,</span>UP<span class="token punctuation">,</span>LOWER_UP<span class="token punctuation">,</span>M-DOWN> mtu 1500 qdisc noqueue
link/ether 02:42:<span class="token function">ac</span>:11:00:03 brd ff:ff:ff:ff:ff:ff
inet 172<span class="token punctuation">.</span>17<span class="token punctuation">.</span>0<span class="token punctuation">.</span>3/16 brd 172<span class="token punctuation">.</span>17<span class="token punctuation">.</span>255<span class="token punctuation">.</span>255 scope global eth0
valid_lft forever preferred_lft forever
<span class="token operator">/</span> <span class="token comment"># ping web1</span>
PING web1 <span class="token punctuation">(</span>172<span class="token punctuation">.</span>17<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2<span class="token punctuation">)</span>: 56 <span class="token keyword">data</span> bytes
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>17<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=0 ttl=64 time=0<span class="token punctuation">.</span>133 ms
64 bytes <span class="token keyword">from</span> 172<span class="token punctuation">.</span>17<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2: seq=1 ttl=64 time=0<span class="token punctuation">.</span>101 ms
^C
<span class="token operator">--</span><span class="token operator">-</span> web1 ping statistics <span class="token operator">--</span><span class="token operator">-</span>
2 packets transmitted<span class="token punctuation">,</span> 2 packets received<span class="token punctuation">,</span> 0% packet loss
round-trip min/avg/max = 0<span class="token punctuation">.</span>101/0<span class="token punctuation">.</span>117/0<span class="token punctuation">.</span>133 ms
<span class="token operator">/</span> <span class="token comment">#</span>
</code></pre>
<p>容器解析查看<code>cat /etc/hosts</code>或者·env·(里面存储变量值）<br> 当容器地址改变时，解析同步变化，变量不变，容器重启后，变量才会改变</p>
<pre><code class="prism language-powershell">
<span class="token operator">/</span> <span class="token comment"># cat /etc/hosts</span>
127<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1 localhost
::1 localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172<span class="token punctuation">.</span>17<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2 nginx 91c420704b24 web1
172<span class="token punctuation">.</span>17<span class="token punctuation">.</span>0<span class="token punctuation">.</span>3 98279a1cd492
<span class="token operator">/</span> <span class="token comment"># env</span>
HOSTNAME=98279a1cd492
SHLVL=1
HOME=<span class="token operator">/</span>
NGINX_ENV_PKG_RELEASE=1~bullseye
NGINX_PORT_80_TCP=tcp:<span class="token operator">/</span><span class="token operator">/</span>172<span class="token punctuation">.</span>17<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2:80
NGINX_ENV_NGINX_VERSION=1<span class="token punctuation">.</span>23<span class="token punctuation">.</span>2
NGINX_ENV_NJS_VERSION=0<span class="token punctuation">.</span>7<span class="token punctuation">.</span>7
TERM=xterm
PATH=<span class="token operator">/</span>usr/local/sbin:<span class="token operator">/</span>usr/local/bin:<span class="token operator">/</span>usr/sbin:<span class="token operator">/</span>usr/bin:<span class="token operator">/</span>sbin:<span class="token operator">/</span>bin
NGINX_PORT=tcp:<span class="token operator">/</span><span class="token operator">/</span>172<span class="token punctuation">.</span>17<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2:80
NGINX_NAME=<span class="token operator">/</span>vm1/nginx
<span class="token function">PWD</span>=<span class="token operator">/</span>
NGINX_PORT_80_TCP_ADDR=172<span class="token punctuation">.</span>17<span class="token punctuation">.</span>0<span class="token punctuation">.</span>2
NGINX_PORT_80_TCP_PORT=80
NGINX_PORT_80_TCP_PROTO=tcp
<span class="token operator">/</span> <span class="token comment">#</span>
</code></pre>
<p><a href="http://img.e-com-net.com/image/info8/576c127be7b3432d8bf80a4cb2bfd122.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/576c127be7b3432d8bf80a4cb2bfd122.jpg" alt="Linux企业应用——Docker（五）之Docker网络_第13张图片" width="650" height="344" style="border:1px solid black;"></a><br> • 外网如何访问容器：<br> • 端口映射<br> • -p 选项指定映射端口</p>
<pre><code class="prism language-powershell"><span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># ps ax | grep dokcer-proxy</span>
4632 pts/0 S+ 0:00 grep <span class="token operator">--</span>color=auto dokcer-proxy
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker run -d --name web2 -p 80:80 nginx</span>
1bbc2a10781df7efdd197fa27b436a11f052e1826f5ee5d5340d4fce8568aa15
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># docker port web2</span>
80/tcp <span class="token operator">-</span>> 0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0:80
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># ps ax | grep dokcer-proxy</span>
5147 pts/0 S+ 0:00 grep <span class="token operator">--</span>color=auto dokcer-proxy
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment"># netstat -antlp| grep :80</span>
tcp 0 0 0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0:80 0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0:<span class="token operator">*</span> LISTEN 4913/docker-proxy
tcp 0 0 172<span class="token punctuation">.</span>27<span class="token punctuation">.</span>84<span class="token punctuation">.</span>9:49624 100<span class="token punctuation">.</span>100<span class="token punctuation">.</span>30<span class="token punctuation">.</span>26:80 ESTABLISHED 1042/AliYunDun
<span class="token namespace">[root@k8s2 ns]</span><span class="token comment">#</span>
</code></pre>
<p>• 外网访问容器用到了docker-proxy和iptables DNAT<br> • 宿主机访问本机容器使用的是iptables DNAT<br> • 外部主机访问容器或容器之间的访问是docker-proxy实现<br> <a href="http://img.e-com-net.com/image/info8/dc4be31814c4409892ebbc0ddf285a50.jpg" target="_blank"><img src="http://img.e-com-net.com/image/info8/dc4be31814c4409892ebbc0ddf285a50.jpg" alt="Linux企业应用——Docker（五）之Docker网络_第14张图片" width="650" height="311" style="border:1px solid black;"></a></p>
<h1>三、跨主机网络通信</h1>
<p>跨主机网络解决方案<br> • docker原生的overlay和macvlan<br> • 第三方的flannel、weave、calico<br> • 众多网络方案是如何与docker集成在一起的<br> • libnetwork docker容器网络库<br> • CNM （Container Network Model）这个模型对容器网络进行了抽象</p>
<h2>macvlan网络方案实现</h2>
<p>• Linux kernel提供的一种网卡虚拟化技术。<br> • 无需Linux bridge，直接使用物理接口，性能极好</p>
<p><mark>在两台主机上</mark>激活网卡开启混杂模式</p>
<pre><code class="prism language-powershell">ip link <span class="token function">set</span> eth0 promisc on
</code></pre>
<p><mark>在两个主机上</mark>创建macvlan网络<br> 设置parent网络为eth0的子接口</p>
<pre><code class="prism language-powershell"> docker network create <span class="token operator">-</span>d macvlan <span class="token operator">--</span>subnet 20<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0/24 <span class="token operator">--</span>gateway 20<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>1 <span class="token operator">-</span>o parent=eth0<span class="token punctuation">.</span>1 macvlan1
</code></pre>
<p>一个主机</p>
<pre><code class="prism language-powershell">docker run <span class="token operator">-</span>it <span class="token operator">--</span><span class="token function">rm</span> <span class="token operator">--</span>name web1 <span class="token operator">--</span>network macvlan1 <span class="token operator">--</span>ip 20<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>11 busyboxplus
</code></pre>
<p>另一个主机</p>
<pre><code class="prism language-powershell"> docker run <span class="token operator">-</span>it <span class="token operator">--</span><span class="token function">rm</span> <span class="token operator">--</span>name vm1 <span class="token operator">--</span>network macvlan1 <span class="token operator">--</span>ip 20<span class="token punctuation">.</span>0<span class="token punctuation">.</span>0<span class="token punctuation">.</span>11 busyboxplus
</code></pre>
<p>两台主机能互相ping通，实现通信</p>
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<a class="tag" taget="_blank" href="/search/eureka/1.htm">eureka</a><a class="tag" taget="_blank" href="/search/%E4%BA%91%E5%8E%9F%E7%94%9F/1.htm">云原生</a>
<div>Docker容器的文件系统是隔离的，但是可以通过挂载卷（Volumes）或绑定挂载（BindMounts）将宿主机的文件系统目录映射到容器内部。要查看Docker容器的映射路径，可以使用以下方法：查看容器配置：使用dockerinspect命令可以查看容器的详细配置信息，包括挂载的卷。例如：bashdockerinspect在输出的JSON格式中，查找"Mounts"部分，这里会列出所有的挂载信息</div>
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<li><a href="/article/1835484742221393920.htm"
title="《在战“疫”中成长致敬生活》观后感" target="_blank">《在战“疫”中成长致敬生活》观后感</a>
<span class="text-muted">梅子刘的刀</span>
<div>（作者：周晨）今天上午，我看了“我是接班人”网络大课堂《在战役中成长致敬生活》。有很多人拿出自己攒下的钱，默默地捐给了武汉，有几千块钱的、有几万块钱的，也有十几万块钱的。连小朋友也把自己的压岁钱捐给了武汉。有名环卫工人把自己五年的积蓄全部捐给了武汉。有名外卖小哥为医护人员买鞋子送吃的。还有已经治愈出院的新型肺炎病人捐了400毫升的血浆。还有位叫大树的叔叔，虽然他没有钱，但是他地里有蔬菜，捐了几大卡</div>
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<li><a href="/article/1835482277870661632.htm"
title="简介Shell、zsh、bash" target="_blank">简介Shell、zsh、bash</a>
<span class="text-muted">zhaosuningsn</span>
<a class="tag" taget="_blank" href="/search/Shell/1.htm">Shell</a><a class="tag" taget="_blank" href="/search/zsh/1.htm">zsh</a><a class="tag" taget="_blank" href="/search/bash/1.htm">bash</a><a class="tag" taget="_blank" href="/search/shell/1.htm">shell</a><a class="tag" taget="_blank" href="/search/linux/1.htm">linux</a><a class="tag" taget="_blank" href="/search/bash/1.htm">bash</a>
<div>Shell是Linux和Unix的外壳，类似衣服，负责外界与Linux和Unix内核的交互联系。例如接收终端用户及各种应用程序的命令，把接收的命令翻译成内核能理解的语言，传递给内核，并把内核处理接收的命令的结果返回给外界，即Shell是外界和内核沟通的桥梁或大门。Linux和Unix提供了多种Shell，其中有种bash，当然还有其他好多种。Mac电脑中不但有bash，还有一个zsh，预装的，据说</div>
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<li><a href="/article/1835479000600899584.htm"
title="Linux MariaDB使用OpenSSL安装SSL证书" target="_blank">Linux MariaDB使用OpenSSL安装SSL证书</a>
<span class="text-muted">Meta39</span>
<a class="tag" taget="_blank" href="/search/MySQL/1.htm">MySQL</a><a class="tag" taget="_blank" href="/search/Oracle/1.htm">Oracle</a><a class="tag" taget="_blank" href="/search/MariaDB/1.htm">MariaDB</a><a class="tag" taget="_blank" href="/search/Linux/1.htm">Linux</a><a class="tag" taget="_blank" href="/search/Windows/1.htm">Windows</a><a class="tag" taget="_blank" href="/search/ssl/1.htm">ssl</a><a class="tag" taget="_blank" href="/search/linux/1.htm">linux</a><a class="tag" taget="_blank" href="/search/mariadb/1.htm">mariadb</a>
<div>进入到证书存放目录，批量删除.pem证书警告：确保已经进入到证书存放目录find.-typef-iname\*.pem-delete查看是否安装OpenSSLopensslversion没有则安装yuminstallopensslopenssl-devel开启SSL编辑/etc/my.cnf文件（没有的话就创建，但是要注意，在/etc/my.cnf.d/server.cnf配置了datadir的，</div>
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<li><a href="/article/1835475963543121920.htm"
title="中原焦点团队网络初中级30期阴丽丽坚持分享第三百八十八次2022.10.18分享 约练次数（74） 咨询师（6） 来访者（53） 观察者（15）" target="_blank">中原焦点团队网络初中级30期阴丽丽坚持分享第三百八十八次2022.10.18分享 约练次数（74） 咨询师（6） 来访者（53） 观察者（15）</a>
<span class="text-muted">阴丽丽</span>
<div>今天是忙碌的一天，一早起来，总想着找点把事情弄完，可总也弄不完。就这样弄着吧！孩子的事，自己的事都在那里搁置着，不想做，有点欧！今天总体还不错，只是在下午起床时走神了俩小时，也算是给自己的放松吧！今日难得1.儿子乖巧、听话，努力配合，一天下来也是忙忙碌碌，这真的很难得！2.儿子今天录的视频被班主任认可，这真的很难得3.我今天早上做核酸时，自己把教案整了一下，这真的很难得</div>
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<li><a href="/article/1835473957185220608.htm"
title="网络编程基础" target="_blank">网络编程基础</a>
<span class="text-muted">记得开心一点啊</span>
<a class="tag" taget="_blank" href="/search/%E7%BD%91%E7%BB%9C/1.htm">网络</a>
<div>目录♫什么是网络编程♫Socket套接字♪什么是Socket套接字♪数据报套接字♪流套接字♫数据报套接字通信模型♪数据报套接字通讯模型♪DatagramSocket♪DatagramPacket♪实现UDP的服务端代码♪实现UDP的客户端代码♫流套接字通信模型♪流套接字通讯模型♪ServerSocket♪Socket♪实现TCP的服务端代码♪实现TCP的客户端代码♫什么是网络编程网络编程，指网络上</div>
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<li><a href="/article/1835469294436184064.htm"
title="【从浅识到熟知Linux】Linux发展史" target="_blank">【从浅识到熟知Linux】Linux发展史</a>
<span class="text-muted">Jammingpro</span>
<a class="tag" taget="_blank" href="/search/%E4%BB%8E%E6%B5%85%E5%AD%A6%E5%88%B0%E7%86%9F%E7%9F%A5Linux/1.htm">从浅学到熟知Linux</a><a class="tag" taget="_blank" href="/search/linux/1.htm">linux</a><a class="tag" taget="_blank" href="/search/%E8%BF%90%E7%BB%B4/1.htm">运维</a><a class="tag" taget="_blank" href="/search/%E6%9C%8D%E5%8A%A1%E5%99%A8/1.htm">服务器</a>
<div>归属专栏：从浅学到熟知Linux个人主页：Jammingpro每日努力一点点，技术变化看得见文章前言：本篇文章记录Linux发展的历史，因在介绍Linux过程中涉及的其他操作系统及人物，本文对相关内容也有所介绍。文章目录Unix发展史Linux发展史开源Linux官网企业应用情况发行版本在学习Linux前，我们可能都会问Linux从哪里来？它是如何发展的。但在介绍Linux之前，需要先介绍一下Un</div>
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<li><a href="/article/1835468963086168064.htm"
title="多子女家庭问题" target="_blank">多子女家庭问题</a>
<span class="text-muted">3e5c5362403c</span>
<div>杨宁宁焦点解决网络初17中19坚持分享589天（2021.3.20）本周约练我1次，总计166次，读书打卡第256天案例督导收获：【家有老大篇】被爱与高期待下的独舞家里的第一个孩子往往集万千宠爱于一身。爸爸妈妈、爷爷奶奶、姥姥姥爷的目光都聚焦在他的身上。在这种光环下长大的孩子，就如小皇帝一般，衣来伸手、饭来张口。拥有爱的同时，也意味着拥有了更高的被期待，父母会花血本给你报各种各样的早教班，给你买各</div>
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<li><a href="/article/1835468833360539648.htm"
title="父母教育孩子的方式，将影响孩子一生" target="_blank">父母教育孩子的方式，将影响孩子一生</a>
<span class="text-muted">树英教育</span>
<div>为什么有些孩子总是充满自信与快乐？独立、有主见又坚强？而有些孩子却自卑、胆怯，软弱又过度依赖父母？为什么有些孩子总是健康、阳光又富于创造力？而有些孩子却悲观、孤僻又思想空乏？一个孩子的行为取决于孩子的思想，思想取决于环境和自己的认知，认知取决于教育。父母是孩子人生中的第一位教育者，父母养育孩子的方式，将决定他们人生的高度，影响他们的一生。网络图，侵权即删优秀的父母就像园丁，既要浇水施肥，又要修剪杂</div>
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<li><a href="/article/1835467782687387648.htm"
title="linux 发展史" target="_blank">linux 发展史</a>
<span class="text-muted">种树的猴子</span>
<a class="tag" taget="_blank" href="/search/%E5%86%85%E6%A0%B8/1.htm">内核</a><a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/%E6%93%8D%E4%BD%9C%E7%B3%BB%E7%BB%9F/1.htm">操作系统</a><a class="tag" taget="_blank" href="/search/linux/1.htm">linux</a><a class="tag" taget="_blank" href="/search/%E5%A4%A7%E6%95%B0%E6%8D%AE/1.htm">大数据</a>
<div>linux发展史说明此前对linux认识模糊一知半解，近期通过学习将自己对于linux的发展总结一下方便大家日后的学习。那Linux是目前一款非常火热的开源操作系统，可是linux是什么时候出现的，又是因为什么样的原因被开发出来的呢。以下将对linux的发展历程进行详细的讲解。目录一、Linux发展背景二、UINIX的诞生三、UNIX的重要分支-BSD的诞生四、Minix的诞生五、GNU与Free</div>
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<li><a href="/article/1835466523163062272.htm"
title="Linux sh命令" target="_blank">Linux sh命令</a>
<span class="text-muted">fengyehongWorld</span>
<a class="tag" taget="_blank" href="/search/Linux/1.htm">Linux</a><a class="tag" taget="_blank" href="/search/linux/1.htm">linux</a>
<div>目录一.基本语法二.选项2.1-c字符串中读取内容，并执行2.1.1基本用法2.1.2获取当前目录下失效的超链接2.2-x每个命令执行之前，将其打印出来2.3结合Here文档使用一.基本语法⏹Linux和Unix系统中用于执行shell脚本或运行命令的命令。sh[选项][脚本文件][参数...]⏹选项-c：从字符串中读取内容，并执行。-x：在每个命令执行之前，将其打印出来。-s：从标准流中读取内容</div>
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<li><a href="/article/1835466270955368448.htm"
title="Linux vi常用命令" target="_blank">Linux vi常用命令</a>
<span class="text-muted">fengyehongWorld</span>
<a class="tag" taget="_blank" href="/search/Linux/1.htm">Linux</a><a class="tag" taget="_blank" href="/search/linux/1.htm">linux</a>
<div>参考资料viコマンド（vimコマンド）リファレンス目录一.保存系命令二.删除系命令三.移动系命令四.复制粘贴系命令一.保存系命令⏹保存并退出:wq⏹强制保存并退出:wq!⏹退出(文件未编辑):q⏹强制退出(忽略已编辑内容):q!⏹另存为:w新文件名二.删除系命令⏹删除当前行dd⏹清空整个文档gg：移动到文档顶部dG：删除到最后一行ggdG三.移动系命令⏹移动到文档顶部gg⏹移动到文档底部#方式1G</div>
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<li><a href="/article/1835463115882459136.htm"
title="2024.9.6 Python，华为笔试题总结，字符串格式化，字符串操作，广度优先搜索解决公司组织绩效互评问题，无向图" target="_blank">2024.9.6 Python，华为笔试题总结，字符串格式化，字符串操作，广度优先搜索解决公司组织绩效互评问题，无向图</a>
<span class="text-muted">RaidenQ</span>
<a class="tag" taget="_blank" href="/search/python/1.htm">python</a><a class="tag" taget="_blank" href="/search/%E5%8D%8E%E4%B8%BA/1.htm">华为</a><a class="tag" taget="_blank" href="/search/leetcode/1.htm">leetcode</a><a class="tag" taget="_blank" href="/search/%E7%AE%97%E6%B3%95/1.htm">算法</a><a class="tag" taget="_blank" href="/search/%E5%8A%9B%E6%89%A3/1.htm">力扣</a><a class="tag" taget="_blank" href="/search/%E5%B9%BF%E5%BA%A6%E4%BC%98%E5%85%88/1.htm">广度优先</a><a class="tag" taget="_blank" href="/search/%E6%97%A0%E5%90%91%E5%9B%BE/1.htm">无向图</a>
<div>1.字符串格式化name="Alice"age=30formatted_string="Name:{},Age:{}".format(name,age)print(formatted_string)或者name="Alice"age=30formatted_string=f"Name:{name},Age:{age}"print(formatted_string)2.网络健康检查第一行有两个整数m</div>
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<li><a href="/article/1835463094311153664.htm"
title="戴容容 中原焦点团队.网络初级第33期,坚持分享第19天 2022年3月9日" target="_blank">戴容容 中原焦点团队.网络初级第33期,坚持分享第19天 2022年3月9日</a>
<span class="text-muted">TessDai</span>
<div>《每个人眼中的世界都是不同的》“一千个人眼里有一千个哈姆雷特”世界是多元的,每个人都有自己的道理,人人按照自己的理解去看待这个世界的人和物.我们如此,其他人也是如此.因此,任何事情,我们要放下自己以为的真理,去理解他人认为的真理,只有同频方能共振.孩子在慢慢长大的过程中慢慢学会独立,甚至对抗.尤其当孩子处于青春期的时候,他们开始有很多自己独立的想法,和一些特立独行的做法,家长常常会觉得不可思议,觉</div>
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<li><a href="/article/1835461728423473152.htm"
title="第1步win10宿主机与虚拟机通过NAT共享上网互通" target="_blank">第1步win10宿主机与虚拟机通过NAT共享上网互通</a>
<span class="text-muted">学习3人组</span>
<a class="tag" taget="_blank" href="/search/%E5%A4%A7%E6%95%B0%E6%8D%AE/1.htm">大数据</a><a class="tag" taget="_blank" href="/search/%E5%A4%A7%E6%95%B0%E6%8D%AE/1.htm">大数据</a>
<div>VM的CentOS采用NAT共用宿主机网卡宿主机器无法连接到虚拟CentOS要实现宿主机与虚拟机通信，原理就是给宿主机的网卡配置一个与虚拟机网关相同网段的IP地址，实现可以互通。1、查看虚拟机的IP地址2、编辑虚拟机的虚拟网络的NAT和DHCP的配置，设置虚拟机的网卡选择NAT共享模式3、宿主机的IP配置，确保vnet8的IPV4属性与虚拟机在同一网段4、ping测试连通性[root@localh</div>
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<li><a href="/article/1835456812720156672.htm"
title="网络通信流程" target="_blank">网络通信流程</a>
<span class="text-muted">记得开心一点啊</span>
<a class="tag" taget="_blank" href="/search/%E6%9C%8D%E5%8A%A1%E5%99%A8/1.htm">服务器</a><a class="tag" taget="_blank" href="/search/%E7%BD%91%E7%BB%9C/1.htm">网络</a><a class="tag" taget="_blank" href="/search/%E8%BF%90%E7%BB%B4/1.htm">运维</a>
<div>目录♫IP地址♫子网掩码♫MAC地址♫相关设备♫ARP寻址♫网络通信流程♫IP地址我们已经知道IP地址由网络号+主机号组成，根据IP地址的不同可以有5钟划分网络号和主机号的方案：其中，各类地址的表示范围是：分类范围适用网络网络数量主机最大连接数A类0.0.0.0~127.255.255.255大型网络12616777214【(2^24)-2】B类128.0.0.0~191.255.255.255中</div>
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title="Java爬虫框架（一）--架构设计" target="_blank">Java爬虫框架（一）--架构设计</a>
<span class="text-muted">狼图腾-狼之传说</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/%E6%A1%86%E6%9E%B6/1.htm">框架</a><a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/%E4%BB%BB%E5%8A%A1/1.htm">任务</a><a class="tag" taget="_blank" href="/search/html%E8%A7%A3%E6%9E%90%E5%99%A8/1.htm">html解析器</a><a class="tag" taget="_blank" href="/search/%E5%AD%98%E5%82%A8/1.htm">存储</a><a class="tag" taget="_blank" href="/search/%E7%94%B5%E5%AD%90%E5%95%86%E5%8A%A1/1.htm">电子商务</a>
<div>一、架构图那里搜网络爬虫框架主要针对电子商务网站进行数据爬取，分析，存储，索引。爬虫：爬虫负责爬取，解析，处理电子商务网站的网页的内容数据库：存储商品信息索引：商品的全文搜索索引Task队列：需要爬取的网页列表Visited表：已经爬取过的网页列表爬虫监控平台：web平台可以启动，停止爬虫，管理爬虫，task队列，visited表。二、爬虫1.流程1)Scheduler启动爬虫器，TaskMast</div>
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<li><a href="/article/82.htm"
title="java类加载顺序" target="_blank">java类加载顺序</a>
<span class="text-muted">3213213333332132</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a>
<div>package com.demo;
/**
* @Description 类加载顺序
* @author FuJianyong
* 2015-2-6上午11:21:37
*/
public class ClassLoaderSequence {
String s1 = "成员属性";
static String s2 = "</div>
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title="Hibernate与mybitas的比较" target="_blank">Hibernate与mybitas的比较</a>
<span class="text-muted">BlueSkator</span>
<a class="tag" taget="_blank" href="/search/sql/1.htm">sql</a><a class="tag" taget="_blank" href="/search/Hibernate/1.htm">Hibernate</a><a class="tag" taget="_blank" href="/search/%E6%A1%86%E6%9E%B6/1.htm">框架</a><a class="tag" taget="_blank" href="/search/ibatis/1.htm">ibatis</a><a class="tag" taget="_blank" href="/search/orm/1.htm">orm</a>
<div>第一章 Hibernate与MyBatis
Hibernate 是当前最流行的O/R mapping框架，它出身于sf.net，现在已经成为Jboss的一部分。 Mybatis 是另外一种优秀的O/R mapping框架。目前属于apache的一个子项目。
MyBatis 参考资料官网：http:</div>
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title="php多维数组排序以及实际工作中的应用" target="_blank">php多维数组排序以及实际工作中的应用</a>
<span class="text-muted">dcj3sjt126com</span>
<a class="tag" taget="_blank" href="/search/PHP/1.htm">PHP</a><a class="tag" taget="_blank" href="/search/usort/1.htm">usort</a><a class="tag" taget="_blank" href="/search/uasort/1.htm">uasort</a>
<div>自定义排序函数返回false或负数意味着第一个参数应该排在第二个参数的前面, 正数或true反之, 0相等usort不保存键名uasort 键名会保存下来uksort 排序是对键名进行的
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<head>
<meta charset="utf-8&q</div>
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<li><a href="/article/463.htm"
title="DOM改变字体大小" target="_blank">DOM改变字体大小</a>
<span class="text-muted">周华华</span>
<a class="tag" taget="_blank" href="/search/%E5%89%8D%E7%AB%AF/1.htm">前端</a>
<div><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml&q</div>
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<li><a href="/article/590.htm"
title="c3p0的配置" target="_blank">c3p0的配置</a>
<span class="text-muted">g21121</span>
<a class="tag" taget="_blank" href="/search/c3p0/1.htm">c3p0</a>
<div>c3p0是一个开源的JDBC连接池，它实现了数据源和JNDI绑定，支持JDBC3规范和JDBC2的标准扩展。c3p0的下载地址是：http://sourceforge.net/projects/c3p0/这里可以下载到c3p0最新版本。
以在spring中配置dataSource为例：
<!-- spring加载资源文件 -->
<bean name="prope</div>
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<li><a href="/article/717.htm"
title="Java获取工程路径的几种方法" target="_blank">Java获取工程路径的几种方法</a>
<span class="text-muted">510888780</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a>
<div>第一种：
File f = new File(this.getClass().getResource("/").getPath());
System.out.println(f);
结果:
C:\Documents%20and%20Settings\Administrator\workspace\projectName\bin
获取当前类的所在工程路径;
如果不加“</div>
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<li><a href="/article/844.htm"
title="在类Unix系统下实现SSH免密码登录服务器" target="_blank">在类Unix系统下实现SSH免密码登录服务器</a>
<span class="text-muted">Harry642</span>
<a class="tag" taget="_blank" href="/search/%E5%85%8D%E5%AF%86/1.htm">免密</a><a class="tag" taget="_blank" href="/search/ssh/1.htm">ssh</a>
<div>1.客户机
(1)执行ssh-keygen -t rsa -C "xxxxx@xxxxx.com"生成公钥，xxx为自定义大email地址
(2)执行scp ~/.ssh/id_rsa.pub root@xxxxxxxxx:/tmp将公钥拷贝到服务器上，xxx为服务器地址
(3)执行cat</div>
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<li><a href="/article/971.htm"
title="Java新手入门的30个基本概念一" target="_blank">Java新手入门的30个基本概念一</a>
<span class="text-muted">aijuans</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/java+%E5%85%A5%E9%97%A8/1.htm">java 入门</a><a class="tag" taget="_blank" href="/search/%E6%96%B0%E6%89%8B/1.htm">新手</a>
<div>在我们学习Java的过程中,掌握其中的基本概念对我们的学习无论是J2SE,J2EE,J2ME都是很重要的,J2SE是Java的基础,所以有必要对其中的基本概念做以归纳,以便大家在以后的学习过程中更好的理解java的精髓,在此我总结了30条基本的概念。 Java概述: 目前Java主要应用于中间件的开发(middleware)---处理客户机于服务器之间的通信技术,早期的实践证明,Java不适合</div>
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<li><a href="/article/1098.htm"
title="Memcached for windows 简单介绍" target="_blank">Memcached for windows 简单介绍</a>
<span class="text-muted">antlove</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/Web/1.htm">Web</a><a class="tag" taget="_blank" href="/search/windows/1.htm">windows</a><a class="tag" taget="_blank" href="/search/cache/1.htm">cache</a><a class="tag" taget="_blank" href="/search/memcached/1.htm">memcached</a>
<div>1. 安装memcached server
a. 下载memcached-1.2.6-win32-bin.zip
b. 解压缩，dos 窗口切换到 memcached.exe所在目录，运行memcached.exe -d install
c.启动memcached Server,直接在dos窗口键入 net start "memcached Server&quo</div>
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<li><a href="/article/1225.htm"
title="数据库对象的视图和索引" target="_blank">数据库对象的视图和索引</a>
<span class="text-muted">百合不是茶</span>
<a class="tag" taget="_blank" href="/search/%E7%B4%A2%E5%BC%95/1.htm">索引</a><a class="tag" taget="_blank" href="/search/oeacle%E6%95%B0%E6%8D%AE%E5%BA%93/1.htm">oeacle数据库</a><a class="tag" taget="_blank" href="/search/%E8%A7%86%E5%9B%BE/1.htm">视图</a>
<div>
视图
视图是从一个表或视图导出的表，也可以是从多个表或视图导出的表。视图是一个虚表，数据库不对视图所对应的数据进行实际存储，只存储视图的定义，对视图的数据进行操作时,只能将字段定义为视图,不能将具体的数据定义为视图
为什么oracle需要视图;
&</div>
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<li><a href="/article/1352.htm"
title="Mockito(一) --入门篇" target="_blank">Mockito(一) --入门篇</a>
<span class="text-muted">bijian1013</span>
<a class="tag" taget="_blank" href="/search/%E6%8C%81%E7%BB%AD%E9%9B%86%E6%88%90/1.htm">持续集成</a><a class="tag" taget="_blank" href="/search/mockito/1.htm">mockito</a><a class="tag" taget="_blank" href="/search/%E5%8D%95%E5%85%83%E6%B5%8B%E8%AF%95/1.htm">单元测试</a>
<div> Mockito是一个针对Java的mocking框架，它与EasyMock和jMock很相似，但是通过在执行后校验什么已经被调用，它消除了对期望 行为（expectations）的需要。其它的mocking库需要你在执行前记录期望行为（expectations），而这导致了丑陋的初始化代码。
&nb</div>
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<li><a href="/article/1479.htm"
title="精通Oracle10编程SQL(5)SQL函数" target="_blank">精通Oracle10编程SQL(5)SQL函数</a>
<span class="text-muted">bijian1013</span>
<a class="tag" taget="_blank" href="/search/oracle/1.htm">oracle</a><a class="tag" taget="_blank" href="/search/%E6%95%B0%E6%8D%AE%E5%BA%93/1.htm">数据库</a><a class="tag" taget="_blank" href="/search/plsql/1.htm">plsql</a>
<div>/*
* SQL函数
*/
--数字函数
--ABS(n):返回数字n的绝对值
declare
v_abs number(6,2);
begin
v_abs:=abs(&no);
dbms_output.put_line('绝对值：'||v_abs);
end;
--ACOS(n):返回数字n的反余弦值，输入值的范围是-1~1，输出值的单位为弧度</div>
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<li><a href="/article/1606.htm"
title="【Log4j一】Log4j总体介绍" target="_blank">【Log4j一】Log4j总体介绍</a>
<span class="text-muted">bit1129</span>
<a class="tag" taget="_blank" href="/search/log4j/1.htm">log4j</a>
<div>Log4j组件：Logger、Appender、Layout
Log4j核心包含三个组件：logger、appender和layout。这三个组件协作提供日志功能：
日志的输出目标
日志的输出格式
日志的输出级别(是否抑制日志的输出)
logger继承特性
A logger is said to be an ancestor of anothe</div>
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<li><a href="/article/1733.htm"
title="Java IO笔记" target="_blank">Java IO笔记</a>
<span class="text-muted">白糖_</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a>
<div> public static void main(String[] args) throws IOException {
//输入流
InputStream in = Test.class.getResourceAsStream("/test");
InputStreamReader isr = new InputStreamReader(in);
Bu</div>
</li>
<li><a href="/article/1860.htm"
title="Docker 监控" target="_blank">Docker 监控</a>
<span class="text-muted">ronin47</span>
<a class="tag" taget="_blank" href="/search/docker%E7%9B%91%E6%8E%A7/1.htm">docker监控</a>
<div>
目前项目内部署了docker，于是涉及到关于监控的事情，参考一些经典实例以及一些自己的想法，总结一下思路。 1、关于监控的内容 监控宿主机本身
监控宿主机本身还是比较简单的，同其他服务器监控类似，对cpu、network、io、disk等做通用的检查，这里不再细说。
额外的，因为是docker的</div>
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<li><a href="/article/1987.htm"
title="java-顺时针打印图形" target="_blank">java-顺时针打印图形</a>
<span class="text-muted">bylijinnan</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a>
<div>一个画图程序 要求打印出：
1.int i=5;
2.1 2 3 4 5
3.16 17 18 19 6
4.15 24 25 20 7
5.14 23 22 21 8
6.13 12 11 10 9
7.
8.int i=6
9.1 2 3 4 5 6
10.20 21 22 23 24 7
11.19</div>
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<li><a href="/article/2114.htm"
title="关于iReport汉化版强制使用英文的配置方法" target="_blank">关于iReport汉化版强制使用英文的配置方法</a>
<span class="text-muted">Kai_Ge</span>
<a class="tag" taget="_blank" href="/search/iReport%E6%B1%89%E5%8C%96/1.htm">iReport汉化</a><a class="tag" taget="_blank" href="/search/%E8%8B%B1%E6%96%87%E7%89%88/1.htm">英文版</a>
<div>对于那些具有强迫症的工程师来说，软件汉化固然好用，但是汉化不完整却极为头疼，本方法针对iReport汉化不完整的情况，强制使用英文版，方法如下：
在 iReport 安装路径下的 etc/ireport.conf 里增加红色部分启动参数，即可变为英文版。
# ${HOME} will be replaced by user home directory accordin</div>
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<li><a href="/article/2241.htm"
title="[并行计算]论宇宙的可计算性" target="_blank">[并行计算]论宇宙的可计算性</a>
<span class="text-muted">comsci</span>
<a class="tag" taget="_blank" href="/search/%E5%B9%B6%E8%A1%8C%E8%AE%A1%E7%AE%97/1.htm">并行计算</a>
<div>
现在我们知道,一个涡旋系统具有并行计算能力.按照自然运动理论,这个系统也同时具有存储能力,同时具备计算和存储能力的系统,在某种条件下一般都会产生意识......
那么,这种概念让我们推论出一个结论
&nb</div>
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<li><a href="/article/2368.htm"
title="用OpenGL实现无限循环的coverflow" target="_blank">用OpenGL实现无限循环的coverflow</a>
<span class="text-muted">dai_lm</span>
<a class="tag" taget="_blank" href="/search/android/1.htm">android</a><a class="tag" taget="_blank" href="/search/coverflow/1.htm">coverflow</a>
<div>网上找了很久，都是用Gallery实现的，效果不是很满意，结果发现这个用OpenGL实现的，稍微修改了一下源码，实现了无限循环功能
源码地址：
https://github.com/jackfengji/glcoverflow
public class CoverFlowOpenGL extends GLSurfaceView implements
GLSurfaceV</div>
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<li><a href="/article/2495.htm"
title="JAVA数据计算的几个解决方案1" target="_blank">JAVA数据计算的几个解决方案1</a>
<span class="text-muted">datamachine</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/Hibernate/1.htm">Hibernate</a><a class="tag" taget="_blank" href="/search/%E8%AE%A1%E7%AE%97/1.htm">计算</a>
<div>老大丢过来的软件跑了10天，摸到点门道，正好跟以前攒的私房有关联，整理存档。
-----------------------------华丽的分割线-------------------------------------
数据计算层是指介于数据存储和应用程序之间，负责计算数据存储层的数据，并将计算结果返回应用程序的层次。J
&nbs</div>
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<li><a href="/article/2622.htm"
title="简单的用户授权系统,利用给user表添加一个字段标识管理员的方式" target="_blank">简单的用户授权系统,利用给user表添加一个字段标识管理员的方式</a>
<span class="text-muted">dcj3sjt126com</span>
<a class="tag" taget="_blank" href="/search/yii/1.htm">yii</a>
<div>怎么创建一个简单的(非 RBAC)用户授权系统
通过查看论坛，我发现这是一个常见的问题，所以我决定写这篇文章。
本文只包括授权系统.假设你已经知道怎么创建身份验证系统(登录)。 数据库
首先在 user 表创建一个新的字段(integer 类型),字段名 'accessLevel',它定义了用户的访问权限 扩展 CWebUser 类
在配置文件(一般为 protecte</div>
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<li><a href="/article/2749.htm"
title="未选之路" target="_blank">未选之路</a>
<span class="text-muted">dcj3sjt126com</span>
<a class="tag" taget="_blank" href="/search/%E8%AF%97/1.htm">诗</a>
<div>作者:罗伯特*费罗斯特
黄色的树林里分出两条路,
可惜我不能同时去涉足,
我在那路口久久伫立,
我向着一条路极目望去,
直到它消失在丛林深处.
但我却选了另外一条路,
它荒草萋萋,十分幽寂;
显得更诱人,更美丽,
虽然在这两条小路上,
都很少留下旅人的足迹.
那天清晨落叶满地,
两条路都未见脚印痕迹.
呵,留下一条路等改日再</div>
</li>
<li><a href="/article/2876.htm"
title="Java处理15位身份证变18位" target="_blank">Java处理15位身份证变18位</a>
<span class="text-muted">蕃薯耀</span>
<a class="tag" taget="_blank" href="/search/18%E4%BD%8D%E8%BA%AB%E4%BB%BD%E8%AF%81%E5%8F%9815%E4%BD%8D/1.htm">18位身份证变15位</a><a class="tag" taget="_blank" href="/search/15%E4%BD%8D%E8%BA%AB%E4%BB%BD%E8%AF%81%E5%8F%9818%E4%BD%8D/1.htm">15位身份证变18位</a><a class="tag" taget="_blank" href="/search/%E8%BA%AB%E4%BB%BD%E8%AF%81%E8%BD%AC%E6%8D%A2/1.htm">身份证转换</a>
<div>
15位身份证变18位，18位身份证变15位
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
蕃薯耀 201</div>
</li>
<li><a href="/article/3003.htm"
title="SpringMVC4零配置--应用上下文配置【AppConfig】" target="_blank">SpringMVC4零配置--应用上下文配置【AppConfig】</a>
<span class="text-muted">hanqunfeng</span>
<a class="tag" taget="_blank" href="/search/springmvc4/1.htm">springmvc4</a>
<div>从spring3.0开始，Spring将JavaConfig整合到核心模块，普通的POJO只需要标注@Configuration注解，就可以成为spring配置类，并通过在方法上标注@Bean注解的方式注入bean。
Xml配置和Java类配置对比如下：
applicationContext-AppConfig.xml
<!-- 激活自动代理功能 参看：</div>
</li>
<li><a href="/article/3130.htm"
title="Android中webview跟JAVASCRIPT中的交互" target="_blank">Android中webview跟JAVASCRIPT中的交互</a>
<span class="text-muted">jackyrong</span>
<a class="tag" taget="_blank" href="/search/JavaScript/1.htm">JavaScript</a><a class="tag" taget="_blank" href="/search/html/1.htm">html</a><a class="tag" taget="_blank" href="/search/android/1.htm">android</a><a class="tag" taget="_blank" href="/search/%E8%84%9A%E6%9C%AC/1.htm">脚本</a>
<div> 在android的应用程序中,可以直接调用webview中的javascript代码,而webview中的javascript代码,也可以去调用ANDROID应用程序(也就是JAVA部分的代码).下面举例说明之:
1 JAVASCRIPT脚本调用android程序
要在webview中,调用addJavascriptInterface(OBJ,int</div>
</li>
<li><a href="/article/3257.htm"
title="8个最佳Web开发资源推荐" target="_blank">8个最佳Web开发资源推荐</a>
<span class="text-muted">lampcy</span>
<a class="tag" taget="_blank" href="/search/%E7%BC%96%E7%A8%8B/1.htm">编程</a><a class="tag" taget="_blank" href="/search/Web/1.htm">Web</a><a class="tag" taget="_blank" href="/search/%E7%A8%8B%E5%BA%8F%E5%91%98/1.htm">程序员</a>
<div>Web开发对程序员来说是一项较为复杂的工作，程序员需要快速地满足用户需求。如今很多的在线资源可以给程序员提供帮助，比如指导手册、在线课程和一些参考资料，而且这些资源基本都是免费和适合初学者的。无论你是需要选择一门新的编程语言，或是了解最新的标准，还是需要从其他地方找到一些灵感，我们这里为你整理了一些很好的Web开发资源，帮助你更成功地进行Web开发。
这里列出10个最佳Web开发资源，它们都是受</div>
</li>
<li><a href="/article/3384.htm"
title="架构师之面试------jdk的hashMap实现" target="_blank">架构师之面试------jdk的hashMap实现</a>
<span class="text-muted">nannan408</span>
<a class="tag" taget="_blank" href="/search/HashMap/1.htm">HashMap</a>
<div>1.前言。
如题。
2.详述。
(1)hashMap算法就是数组链表。数组存放的元素是键值对。jdk通过移位算法（其实也就是简单的加乘算法），如下代码来生成数组下标(生成后indexFor一下就成下标了）。
static int hash(int h)
{
h ^= (h >>> 20) ^ (h >>></div>
</li>
<li><a href="/article/3511.htm"
title="html禁止清除input文本输入缓存" target="_blank">html禁止清除input文本输入缓存</a>
<span class="text-muted">Rainbow702</span>
<a class="tag" taget="_blank" href="/search/html/1.htm">html</a><a class="tag" taget="_blank" href="/search/%E7%BC%93%E5%AD%98/1.htm">缓存</a><a class="tag" taget="_blank" href="/search/input/1.htm">input</a><a class="tag" taget="_blank" href="/search/%E8%BE%93%E5%85%A5%E6%A1%86/1.htm">输入框</a><a class="tag" taget="_blank" href="/search/change/1.htm">change</a>
<div>多数浏览器默认会缓存input的值，只有使用ctl+F5强制刷新的才可以清除缓存记录。
如果不想让浏览器缓存input的值，有2种方法：
方法一： 在不想使用缓存的input中添加 autocomplete="off";
<input type="text" autocomplete="off" n</div>
</li>
<li><a href="/article/3638.htm"
title="POJO和JavaBean的区别和联系" target="_blank">POJO和JavaBean的区别和联系</a>
<span class="text-muted">tjmljw</span>
<a class="tag" taget="_blank" href="/search/POJO/1.htm">POJO</a><a class="tag" taget="_blank" href="/search/java+beans/1.htm">java beans</a>
<div>POJO 和JavaBean是我们常见的两个关键字，一般容易混淆，POJO全称是Plain Ordinary Java Object / Pure Old Java Object，中文可以翻译成：普通Java类，具有一部分getter/setter方法的那种类就可以称作POJO，但是JavaBean则比 POJO复杂很多， Java Bean 是可复用的组件，对 Java Bean 并没有严格的规</div>
</li>
<li><a href="/article/3765.htm"
title="java中单例的五种写法" target="_blank">java中单例的五种写法</a>
<span class="text-muted">liuxiaoling</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/%E5%8D%95%E4%BE%8B/1.htm">单例</a>
<div>/**
* 单例模式的五种写法：
* 1、懒汉
* 2、恶汉
* 3、静态内部类
* 4、枚举
* 5、双重校验锁
*/
/**
* 五、 双重校验锁，在当前的内存模型中无效
*/
class LockSingleton
{
private volatile static LockSingleton singleton;
pri</div>
</li>
</ul>
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