weixin_30516243

docker3

Docker容器的设置资源（cpu，内存）限制：

#docker run –memory=200M xxxx-image --vm 1 –verbose

#docker run --cpu-shares=10 --name=test1 xxx-image --cpu 1

#docker run --cpu-shares=5 --name=test2 xxx-image --cpu 2

底层技术支持：

(1) Namespaces : 做隔离pid, net, ipc, mnt, uts

(2) Control groups : 做资源限制

(3) Union file systems ：Container和image的分层；

[root@zizhen02 ~]# docker run --cpu-shares=2 --name=test3 ubuntu-stress --cpu 1

stress: info: [1] dispatching hogs: 1 cpu, 0 io, 0 vm, 0 hdd

[root@zizhen02 ~]# docker run --cpu-shares=4 ubuntu-stress --cpu 1

stress: info: [1] dispatching hogs: 1 cpu, 0 io, 0 vm, 0 hdd

Tasks: 116 total, 3 running, 113 sleeping, 0 stopped, 0 zombie

%Cpu(s):100.0 us, 0.0 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st

KiB Mem : 1863224 total, 1062620 free, 381180 used, 419424 buff/cache

KiB Swap: 1572860 total, 1503996 free, 68864 used. 1276984 avail Mem

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND

8654 root 20 0 8228 100 0 R 66.4 0.0 0:04.76 stress

8542 root 20 0 8228 96 0 R 32.9 0.0 0:40.13 stress

Docker网络技术

分单机和多机：

单机有三种：bridge Network 、Host Network、None Network;

多机： Overlay Network ;

#docker ps

#docker exec [container-ID] ip a

#ip netns list 列出命名空间

#ip netns delete test1 删除test1

#ip netns list

#ip netns add test1 增加test1

#ip netns list

#ip netns exec test1 ip a 在test1中执行ip a ;

# ip netns exec test1 ip link set dev lo up 在test1 执行命令lo端口up状态；

[root@zizhen02 ~]# ip netns exec test1 ip a

1: lo: mtu 65536 qdisc noop state DOWN group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

[root@zizhen02 ~]# ip netns exec test1 ip link set dev lo up

[root@zizhen02 ~]# ip netns list

test1

[root@zizhen02 ~]# ip netns exec test1 ip a

1: lo: 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

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

[root@zizhen02 ~]#

测试创建NameSpace

[root@zizhen02 ~]# ip link

1: lo: mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

2: ens33: mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000

link/ether 00:0c:29:cb:78:e2 brd ff:ff:ff:ff:ff:ff

3: docker0: mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default

link/ether 02:42:d4:5d:cf:c5 brd ff:ff:ff:ff:ff:ff

[root@zizhen02 ~]# ip link add veth-test1 type veth peer name veth-test2

[root@zizhen02 ~]# ip netns list

[root@zizhen02 ~]# ip link

1: lo: mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

2: ens33: mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000

link/ether 00:0c:29:cb:78:e2 brd ff:ff:ff:ff:ff:ff

3: docker0: mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default

link/ether 02:42:d4:5d:cf:c5 brd ff:ff:ff:ff:ff:ff

8: veth-test2@veth-test1: mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/ether c6:97:91:b0:31:9c brd ff:ff:ff:ff:ff:ff

9: veth-test1@veth-test2: mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/ether 8e:69:f6:fd:e5:87 brd ff:ff:ff:ff:ff:ff

[root@zizhen02 ~]# ip netns exec test1 ip link

Cannot open network namespace "test1": No such file or directory

[root@zizhen02 ~]# ip netns add test1

[root@zizhen02 ~]# ip netns list

test1

[root@zizhen02 ~]# ip netns exec test1 ip link

1: lo: mtu 65536 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

[root@zizhen02 ~]# ip link set veth-test1 netns test1

[root@zizhen02 ~]# ip netns exec test1 ip link

1: lo: mtu 65536 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

9: veth-test1@if8: mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/ether 8e:69:f6:fd:e5:87 brd ff:ff:ff:ff:ff:ff link-netnsid 0

[root@zizhen02 ~]# ip link

1: lo: mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

2: ens33: mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000

link/ether 00:0c:29:cb:78:e2 brd ff:ff:ff:ff:ff:ff

3: docker0: mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default

link/ether 02:42:d4:5d:cf:c5 brd ff:ff:ff:ff:ff:ff

8: veth-test2@if9: mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/ether c6:97:91:b0:31:9c brd ff:ff:ff:ff:ff:ff link-netnsid 0

[root@zizhen02 ~]#

[root@zizhen02 ~]#

[root@zizhen02 ~]#

[root@zizhen02 ~]# ip netns add test2

[root@zizhen02 ~]# ip netns list

test2

test1 (id: 0)

[root@zizhen02 ~]# ip netns exec test2 ip link

1: lo: mtu 65536 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

[root@zizhen02 ~]# ip link set veth-test2 netns test2

[root@zizhen02 ~]# ip netns exec test2 ip link

1: lo: mtu 65536 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

8: veth-test2@if9: mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/ether c6:97:91:b0:31:9c brd ff:ff:ff:ff:ff:ff link-netnsid 0

[root@zizhen02 ~]# ip link

1: lo: mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

2: ens33: mtu 1500 qdisc pfifo_fast state UP mode DEFAULT group default qlen 1000

link/ether 00:0c:29:cb:78:e2 brd ff:ff:ff:ff:ff:ff

3: docker0: mtu 1500 qdisc noqueue state DOWN mode DEFAULT group default

link/ether 02:42:d4:5d:cf:c5 brd ff:ff:ff:ff:ff:ff

[root@zizhen02 ~]#

[root@zizhen02 ~]#

[root@zizhen02 ~]# ip netns exec test1 ip addr add 192.168.0.1/24 dev veth-test1

[root@zizhen02 ~]# ip netns exec test2 ip addr add 192.168.0.2/24 dev veth-test2

[root@zizhen02 ~]# ip netns exec test2 ip link

1: lo: mtu 65536 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

8: veth-test2@if9: mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/ether c6:97:91:b0:31:9c brd ff:ff:ff:ff:ff:ff link-netnsid 0

[root@zizhen02 ~]# ip netns exec test1 ip link

1: lo: mtu 65536 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

9: veth-test1@if8: mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/ether 8e:69:f6:fd:e5:87 brd ff:ff:ff:ff:ff:ff link-netnsid 1

[root@zizhen02 ~]# ip netns exec test1 ip link set dev veth-test1 up

[root@zizhen02 ~]# ip netns exec test2 ip link set dev veth-test1 up

Cannot find device "veth-test1"

[root@zizhen02 ~]# ip netns exec test2 ip link set dev veth-test2 up

[root@zizhen02 ~]#

[root@zizhen02 ~]# ip netns exec test1 ip link

1: lo: mtu 65536 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

9: veth-test1@if8: mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000

link/ether 8e:69:f6:fd:e5:87 brd ff:ff:ff:ff:ff:ff link-netnsid 1

[root@zizhen02 ~]# ip netns exec test2 ip link

1: lo: mtu 65536 qdisc noop state DOWN mode DEFAULT group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

8: veth-test2@if9: mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000

link/ether c6:97:91:b0:31:9c brd ff:ff:ff:ff:ff:ff link-netnsid 0

[root@zizhen02 ~]# ip netns exec test1 ip a

1: lo: mtu 65536 qdisc noop state DOWN group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

9: veth-test1@if8: mtu 1500 qdisc noqueue state UP group default qlen 1000

link/ether 8e:69:f6:fd:e5:87 brd ff:ff:ff:ff:ff:ff link-netnsid 1

inet 192.168.0.1/24 scope global veth-test1

valid_lft forever preferred_lft forever

inet6 fe80::8c69:f6ff:fefd:e587/64 scope link

valid_lft forever preferred_lft forever

[root@zizhen02 ~]# ip netns exec test2 ip a

1: lo: mtu 65536 qdisc noop state DOWN group default qlen 1000

link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00

8: veth-test2@if9: mtu 1500 qdisc noqueue state UP group default qlen 1000

link/ether c6:97:91:b0:31:9c brd ff:ff:ff:ff:ff:ff link-netnsid 0

inet 192.168.0.2/24 scope global veth-test2

valid_lft forever preferred_lft forever

inet6 fe80::c497:91ff:feb0:319c/64 scope link

valid_lft forever preferred_lft forever

[root@zizhen02 ~]# ip netns exec test1 ping 192.168.0.2

PING 192.168.0.2 (192.168.0.2) 56(84) bytes of data.

64 bytes from 192.168.0.2: icmp_seq=1 ttl=64 time=0.075 ms

64 bytes from 192.168.0.2: icmp_seq=2 ttl=64 time=0.048 ms

64 bytes from 192.168.0.2: icmp_seq=3 ttl=64 time=0.052 ms

^C

--- 192.168.0.2 ping statistics ---

3 packets transmitted, 3 received, 0% packet loss, time 1999ms

rtt min/avg/max/mdev = 0.048/0.058/0.075/0.013 ms

[root@zizhen02 ~]# ip netns exec test2 ping 192.168.0.1

PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.

64 bytes from 192.168.0.1: icmp_seq=1 ttl=64 time=0.050 ms

64 bytes from 192.168.0.1: icmp_seq=2 ttl=64 time=0.059 ms

64 bytes from 192.168.0.1: icmp_seq=3 ttl=64 time=0.049 ms

^C

--- 192.168.0.1 ping statistics ---

3 packets transmitted, 3 received, 0% packet loss, time 1999ms

rtt min/avg/max/mdev = 0.049/0.052/0.059/0.009 ms

[root@zizhen02 ~]#

[root@zizhen02 ~]# ip netns list

test2 (id: 1)

test1 (id: 0)

以上和container 中的namespace原理是一样的；

31 docker Bridge0详解

[root@zizhen02 ~]# docker network ls

NETWORK ID NAME DRIVER SCOPE

ba670d30bad7 bridge bridge local

63c3ce67f785 host host local

04734d810393 none null local

[root@zizhen02 ~]#

[root@zizhen02 ~]# docker run -it busybox /bin/sh

/ # ip a

1: lo: 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

16: eth0@if17: 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

/ #

[root@zizhen02 ~]# docker network

Usage: docker network COMMAND

Manage networks

Commands:

connect Connect a container to a network

create Create a network

disconnect Disconnect a container from a network

inspect Display detailed information on one or more networks

ls List networks

prune Remove all unused networks

rm Remove one or more networks

Run 'docker network COMMAND --help' for more information on a command.

[root@zizhen02 ~]# docker network inspect

"docker network inspect" requires at least 1 argument.

See 'docker network inspect --help'.

Usage: docker network inspect [OPTIONS] NETWORK [NETWORK...]

Display detailed information on one or more networks

[root@zizhen02 ~]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

20ec4d84140c busybox "/bin/sh" About a minute ago Up About a minute thirsty_poitras

[root@zizhen02 ~]# docker network inspect 20ec4d84140c

[]

Error: No such network: 20ec4d84140c

[root@zizhen02 ~]# docker network ls

NETWORK ID NAME DRIVER SCOPE

ba670d30bad7 bridge bridge local

63c3ce67f785 host host local

04734d810393 none null local

[root@zizhen02 ~]# docker network inspect ba670d30bad7

[

{

"Name": "bridge",

"Id": "ba670d30bad79bfe622c99522aabfb60581181f4c69ebf42b0d6ca56904312a7",

"Created": "2019-03-17T16:25:22.229320555+08:00",

"Scope": "local",

"Driver": "bridge",

"EnableIPv6": false,

"IPAM": {

"Driver": "default",

"Options": null,

"Config": [

{

"Subnet": "172.17.0.0/16",

"Gateway": "172.17.0.1"

}

]

},

"Internal": false,

"Attachable": false,

"Ingress": false,

"ConfigFrom": {

"Network": ""

},

"ConfigOnly": false,

"Containers": {

"20ec4d84140c8e5b6bd183d51501c2c93a68748fd0b917c54d1986629132a872": {

"Name": "thirsty_poitras",

"EndpointID": "37e6bdd9da3b2841800372e018359a2f6ed76663c89a01e74032e8300bfca0c5",

"MacAddress": "02:42:ac:11:00:02",

"IPv4Address": "172.17.0.2/16",

"IPv6Address": ""

}

},

"Options": {

"com.docker.network.bridge.default_bridge": "true",

"com.docker.network.bridge.enable_icc": "true",

"com.docker.network.bridge.enable_ip_masquerade": "true",

"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",

"com.docker.network.bridge.name": "docker0",

"com.docker.network.driver.mtu": "1500"

},

"Labels": {}

}

]

[root@zizhen02 ~]#

[root@zizhen02 ~]# ip a

1: lo: 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

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: ens33: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link/ether 00:0c:29:cb:78:e2 brd ff:ff:ff:ff:ff:ff

inet 192.168.1.107/24 brd 192.168.1.255 scope global noprefixroute ens33

valid_lft forever preferred_lft forever

inet6 fe80::20c:29ff:fecb:78e2/64 scope link

valid_lft forever preferred_lft forever

3: docker0: mtu 1500 qdisc noqueue state UP group default

link/ether 02:42:d4:5d:cf:c5 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

inet6 fe80::42:d4ff:fe5d:cfc5/64 scope link

valid_lft forever preferred_lft forever

17: veth7b3ed30@if16: mtu 1500 qdisc noqueue master docker0 state UP group default

link/ether d2:30:94:3a:f8:e7 brd ff:ff:ff:ff:ff:ff link-netnsid 0

inet6 fe80::d030:94ff:fe3a:f8e7/64 scope link

valid_lft forever preferred_lft forever

[root@zizhen02 ~]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

20ec4d84140c busybox "/bin/sh" 39 minutes ago Up 39 minutes thirsty_poitras

[root@zizhen02 ~]# docker exec 20ec4d84140c ip a

1: lo: 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

16: eth0@if17: 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

[root@zizhen02 ~]#

#yum install bridge-utils 安装brctl命令

[root@zizhen02 ~]# brctl

Usage: brctl [commands]

commands:

addbr add bridge

delbr delete bridge

addif add interface to bridge

delif delete interface from bridge

hairpin {on|off} turn hairpin on/off

setageing set ageing time

setbridgeprio set bridge priority

setfd set bridge forward delay

sethello set hello time

setmaxage set max message age

setpathcost set path cost

setportprio set port priority

show [ ] show a list of bridges

showmacs show a list of mac addrs

showstp show bridge stp info

stp {on|off} turn stp on/off

[root@zizhen02 ~]# brctl show

bridge name bridge id STP enabled interfaces

docker0 8000.0242d45dcfc5 no veth7b3ed30

[root@zizhen02 ~]#

[root@zizhen02 ~]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

241e3d0e5472 busybox "/bin/sh" 13 seconds ago Up 12 seconds test2

20ec4d84140c busybox "/bin/sh" About an hour ago Up About an hour thirsty_poitras

[root@zizhen02 ~]# ip a

1: lo: 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

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: ens33: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link/ether 00:0c:29:cb:78:e2 brd ff:ff:ff:ff:ff:ff

inet 192.168.1.107/24 brd 192.168.1.255 scope global noprefixroute ens33

valid_lft forever preferred_lft forever

inet6 fe80::20c:29ff:fecb:78e2/64 scope link

valid_lft forever preferred_lft forever

3: docker0: mtu 1500 qdisc noqueue state UP group default

link/ether 02:42:d4:5d:cf:c5 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

inet6 fe80::42:d4ff:fe5d:cfc5/64 scope link

valid_lft forever preferred_lft forever

17: veth7b3ed30@if16: mtu 1500 qdisc noqueue master docker0 state UP group default

link/ether d2:30:94:3a:f8:e7 brd ff:ff:ff:ff:ff:ff link-netnsid 0

inet6 fe80::d030:94ff:fe3a:f8e7/64 scope link

valid_lft forever preferred_lft forever

21: vethe2d3a11@if20: mtu 1500 qdisc noqueue master docker0 state UP group default

link/ether c2:7c:c2:70:7a:83 brd ff:ff:ff:ff:ff:ff link-netnsid 1

inet6 fe80::c07c:c2ff:fe70:7a83/64 scope link

valid_lft forever preferred_lft forever

[root@zizhen02 ~]# docker exec test2 ip a

1: lo: 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

20: eth0@if21: mtu 1500 qdisc noqueue

link/ether 02:42:ac:11:00:03 brd ff:ff:ff:ff:ff:ff

inet 172.17.0.3/16 brd 172.17.255.255 scope global eth0

valid_lft forever preferred_lft forever

[root@zizhen02 ~]# docker exec 20ec4d84140c ip a

1: lo: 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

16: eth0@if17: 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

[root@zizhen02 ~]#

bridge name bridge id STP enabled interfaces

docker0 8000.0242d45dcfc5 no veth7b3ed30

vethe2d3a11

[root@zizhen02 ~]# docker network inspect bridge

[

{

"Name": "bridge",

"Id": "ba670d30bad79bfe622c99522aabfb60581181f4c69ebf42b0d6ca56904312a7",

"Created": "2019-03-17T16:25:22.229320555+08:00",

"Scope": "local",

"Driver": "bridge",

"EnableIPv6": false,

"IPAM": {

"Driver": "default",

"Options": null,

"Config": [

{

"Subnet": "172.17.0.0/16",

"Gateway": "172.17.0.1"

}

]

},

"Internal": false,

"Attachable": false,

"Ingress": false,

"ConfigFrom": {

"Network": ""

},

"ConfigOnly": false,

"Containers": {

"20ec4d84140c8e5b6bd183d51501c2c93a68748fd0b917c54d1986629132a872": {

"Name": "thirsty_poitras",

"EndpointID": "37e6bdd9da3b2841800372e018359a2f6ed76663c89a01e74032e8300bfca0c5",

"MacAddress": "02:42:ac:11:00:02",

"IPv4Address": "172.17.0.2/16",

"IPv6Address": ""

},

"241e3d0e5472226ed17d11c66dcaa33869c7f956c469c20e3e2494847c586bdb": {

"Name": "test2",

"EndpointID": "e21cb10c66681e19f67240a60199d37d34070a8aa3bf104d86048e72d447cd19",

"MacAddress": "02:42:ac:11:00:03",

"IPv4Address": "172.17.0.3/16",

"IPv6Address": ""

}

},

"Options": {

"com.docker.network.bridge.default_bridge": "true",

"com.docker.network.bridge.enable_icc": "true",

"com.docker.network.bridge.enable_ip_masquerade": "true",

"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",

"com.docker.network.bridge.name": "docker0",

"com.docker.network.driver.mtu": "1500"

},

"Labels": {}

}

]

[root@zizhen02 ~]#

如何访问外网

32 Docker多容器通信：

--link test1 #相当于给容器添加了一个dns记录；

[root@zizhen02 ~]# docker run -it --name=test1 busybox

/ #

/ #

/ # ip a

1: lo: 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

6: eth0@if7: 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

/ #

[root@zizhen02 ~]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

4e4298cae8d2 busybox "sh" 5 minutes ago Up 5 minutes test1

[root@zizhen02 ~]# docker run -it --name=test2 --link test1 busybox /bin/sh

/ #

/ # ip a

1: lo: 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

10: eth0@if11: mtu 1500 qdisc noqueue

link/ether 02:42:ac:11:00:03 brd ff:ff:ff:ff:ff:ff

inet 172.17.0.3/16 brd 172.17.255.255 scope global eth0

valid_lft forever preferred_lft forever

/ # ping 172.17.0.2

PING 172.17.0.2 (172.17.0.2): 56 data bytes

64 bytes from 172.17.0.2: seq=0 ttl=64 time=0.351 ms

64 bytes from 172.17.0.2: seq=1 ttl=64 time=0.160 ms

^C

--- 172.17.0.2 ping statistics ---

2 packets transmitted, 2 packets received, 0% packet loss

round-trip min/avg/max = 0.160/0.255/0.351 ms

/ # ping test1

PING test1 (172.17.0.2): 56 data bytes

64 bytes from 172.17.0.2: seq=0 ttl=64 time=0.171 ms

64 bytes from 172.17.0.2: seq=1 ttl=64 time=0.159 ms

64 bytes from 172.17.0.2: seq=2 ttl=64 time=0.160 ms

^C

--- test1 ping statistics ---

3 packets transmitted, 3 packets received, 0% packet loss

round-trip min/avg/max = 0.159/0.163/0.171 ms

/ # test1:3306^C

/ #

/ #

[root@zizhen02 ~]# docker run -it --name=test1 busybox

/ #

/ #

/ # ip a

1: lo: 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

6: eth0@if7: 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

/ #

/ # ping 172.17.0.3

PING 172.17.0.3 (172.17.0.3): 56 data bytes

64 bytes from 172.17.0.3: seq=0 ttl=64 time=0.264 ms

64 bytes from 172.17.0.3: seq=1 ttl=64 time=0.369 ms

^C

--- 172.17.0.3 ping statistics ---

2 packets transmitted, 2 packets received, 0% packet loss

round-trip min/avg/max = 0.264/0.316/0.369 ms

/ # ping test2

ping: bad address 'test2'

/ #

/ #

创建docker 的Network；

[root@zizhen02 ~]# docker network ls

NETWORK ID NAME DRIVER SCOPE

a5950ee18ba0 bridge bridge local

63c3ce67f785 host host local

04734d810393 none null local

[root@zizhen02 ~]# docker network create -d bridge my-bridge

831bb402cb76aaf543a53652e1c24d7128b23ee34bcdf40f97e6d0dbb93dea48

[root@zizhen02 ~]# docker network ls

NETWORK ID NAME DRIVER SCOPE

a5950ee18ba0 bridge bridge local

63c3ce67f785 host host local

831bb402cb76 my-bridge bridge local

04734d810393 none null local

[root@zizhen02 ~]#

[root@zizhen02 ~]# brctl show

bridge name bridge id STP enabled interfaces

br-831bb402cb76 8000.02428cb086ee no

docker0 8000.024230fa6b46 no veth48b93cc

vethe56d79c

[root@zizhen02 ~]#

[root@zizhen02 ~]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

303720caaf49 busybox "/bin/sh" 20 seconds ago Up 18 seconds test3

3929edfaabbf busybox "/bin/sh" 9 minutes ago Up 9 minutes test2

4e4298cae8d2 busybox "sh" 15 minutes ago Up 15 minutes test1

[root@zizhen02 ~]# brctl show

bridge name bridge id STP enabled interfaces

br-831bb402cb76 8000.02428cb086ee no vetha25a34c

docker0 8000.024230fa6b46 no veth48b93cc

vethe56d79c

[root@zizhen02 ~]# docker network inspect 831bb402cb76

[

{

"Name": "my-bridge",

"Id": "831bb402cb76aaf543a53652e1c24d7128b23ee34bcdf40f97e6d0dbb93dea48",

"Created": "2019-03-19T11:51:22.983099054+08:00",

"Scope": "local",

"Driver": "bridge",

"EnableIPv6": false,

"IPAM": {

"Driver": "default",

"Options": {},

"Config": [

{

"Subnet": "172.18.0.0/16",

"Gateway": "172.18.0.1"

}

]

},

"Internal": false,

"Attachable": false,

"Ingress": false,

"ConfigFrom": {

"Network": ""

},

"ConfigOnly": false,

"Containers": {

"303720caaf49932f8d7a90538869d7a4e4d0dca79f788c867e2ac654be90b905": {

"Name": "test3",

"EndpointID": "9d2ab6fdee54e5000af6782919de76330d9b2acecd99add74e9653ed6ff1624c",

"MacAddress": "02:42:ac:12:00:02",

"IPv4Address": "172.18.0.2/16",

"IPv6Address": ""

}

},

"Options": {},

"Labels": {}

}

]

[root@zizhen02 ~]#

[root@zizhen02 ~]# docker run -it --name test3 --network my-bridge busybox /bin/sh

/ # ip a

1: lo: 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

13: eth0@if14: mtu 1500 qdisc noqueue

link/ether 02:42:ac:12:00:02 brd ff:ff:ff:ff:ff:ff

inet 172.18.0.2/16 brd 172.18.255.255 scope global eth0

valid_lft forever preferred_lft forever

/ #

#以上my-bridge 里有一个test3 ；my-bridge 连接到test3上了。

#将已有的容器test2 ，连接到my-bridge上；

[root@zizhen02 ~]# docker network

Usage: docker network COMMAND

Manage networks

Commands:

connect Connect a container to a network

create Create a network

disconnect Disconnect a container from a network

inspect Display detailed information on one or more networks

ls List networks

prune Remove all unused networks

rm Remove one or more networks

Run 'docker network COMMAND --help' for more information on a command.

[root@zizhen02 ~]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

303720caaf49 busybox "/bin/sh" 19 minutes ago Up 19 minutes test3

3929edfaabbf busybox "/bin/sh" 28 minutes ago Up 28 minutes test2

4e4298cae8d2 busybox "sh" 34 minutes ago Up 34 minutes test1

[root@zizhen02 ~]# docker network connect

"docker network connect" requires exactly 2 arguments.

See 'docker network connect --help'.

Usage: docker network connect [OPTIONS] NETWORK CONTAINER

Connect a container to a network

[root@zizhen02 ~]# docker network connect my-bridge test2

[root@zizhen02 ~]# docker network ls

NETWORK ID NAME DRIVER SCOPE

a5950ee18ba0 bridge bridge local

63c3ce67f785 host host local

831bb402cb76 my-bridge bridge local

04734d810393 none null local

[root@zizhen02 ~]# docker network inspect 831bb402cb76

[

{

"Name": "my-bridge",

"Id": "831bb402cb76aaf543a53652e1c24d7128b23ee34bcdf40f97e6d0dbb93dea48",

"Created": "2019-03-19T11:51:22.983099054+08:00",

"Scope": "local",

"Driver": "bridge",

"EnableIPv6": false,

"IPAM": {

"Driver": "default",

"Options": {},

"Config": [

{

"Subnet": "172.18.0.0/16",

"Gateway": "172.18.0.1"

}

]

},

"Internal": false,

"Attachable": false,

"Ingress": false,

"ConfigFrom": {

"Network": ""

},

"ConfigOnly": false,

"Containers": {

"303720caaf49932f8d7a90538869d7a4e4d0dca79f788c867e2ac654be90b905": {

"Name": "test3",

"EndpointID": "9d2ab6fdee54e5000af6782919de76330d9b2acecd99add74e9653ed6ff1624c",

"MacAddress": "02:42:ac:12:00:02",

"IPv4Address": "172.18.0.2/16",

"IPv6Address": ""

},

"3929edfaabbf9e483020bdddf16278527496e9cad87aa0068cadea32899d5c2a": {

"Name": "test2",

"EndpointID": "a04c261ab21a456e2c963644ae93b54077ca704d59df872f926545d989f97acf",

"MacAddress": "02:42:ac:12:00:03",

"IPv4Address": "172.18.0.3/16",

"IPv6Address": ""

}

},

"Options": {},

"Labels": {}

}

]

[root@zizhen02 ~]# docker network ls

NETWORK ID NAME DRIVER SCOPE

a5950ee18ba0 bridge bridge local

63c3ce67f785 host host local

831bb402cb76 my-bridge bridge local

04734d810393 none null local

[root@zizhen02 ~]# docker network inspect a5950ee18ba0

[

{

"Name": "bridge",

"Id": "a5950ee18ba0f1ab93c5ae276f3123c4d657edef17d6fad9c5c13b23f952e507",

"Created": "2019-03-19T11:33:02.336302433+08:00",

"Scope": "local",

"Driver": "bridge",

"EnableIPv6": false,

"IPAM": {

"Driver": "default",

"Options": null,

"Config": [

{

"Subnet": "172.17.0.0/16",

"Gateway": "172.17.0.1"

}

]

},

"Internal": false,

"Attachable": false,

"Ingress": false,

"ConfigFrom": {

"Network": ""

},

"ConfigOnly": false,

"Containers": {

"3929edfaabbf9e483020bdddf16278527496e9cad87aa0068cadea32899d5c2a": {

"Name": "test2",

"EndpointID": "75b242bb36530983d83a602e128838fc32854b38553108575db53cbe2505912f",

"MacAddress": "02:42:ac:11:00:03",

"IPv4Address": "172.17.0.3/16",

"IPv6Address": ""

},

"4e4298cae8d2832a0381c3b722dd821f4bc29a1f5bc349eb755aa9a7a69417bd": {

"Name": "test1",

"EndpointID": "d6940d5fa36e857af209bafa330f23fab82dd685b1c89d5840b7c33953edf8c5",

"MacAddress": "02:42:ac:11:00:02",

"IPv4Address": "172.17.0.2/16",

"IPv6Address": ""

}

},

"Options": {

"com.docker.network.bridge.default_bridge": "true",

"com.docker.network.bridge.enable_icc": "true",

"com.docker.network.bridge.enable_ip_masquerade": "true",

"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",

"com.docker.network.bridge.name": "docker0",

"com.docker.network.driver.mtu": "1500"

},

"Labels": {}

}

]

[root@zizhen02 ~]#test2

/ # ip a

1: lo: 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

10: eth0@if11: mtu 1500 qdisc noqueue

link/ether 02:42:ac:11:00:03 brd ff:ff:ff:ff:ff:ff

inet 172.17.0.3/16 brd 172.17.255.255 scope global eth0

valid_lft forever preferred_lft forever

15: eth1@if16: mtu 1500 qdisc noqueue

link/ether 02:42:ac:12:00:03 brd ff:ff:ff:ff:ff:ff

inet 172.18.0.3/16 brd 172.18.255.255 scope global eth1

valid_lft forever preferred_lft forever

/ #

33 Docker的端口映射;

[root@zizhen02 ~]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

303720caaf49 busybox "/bin/sh" 8 hours ago Up 8 hours test3

3929edfaabbf busybox "/bin/sh" 8 hours ago Up 8 hours test2

4e4298cae8d2 busybox "sh" 8 hours ago Up 8 hours test1

[root@zizhen02 ~]# docker container stop test1 test2 test3

test1

test2

test3

[root@zizhen02 ~]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

[root@zizhen02 ~]# docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

303720caaf49 busybox "/bin/sh" 8 hours ago Exited (137) 12 seconds ago test3

3929edfaabbf busybox "/bin/sh" 8 hours ago Exited (137) 12 seconds ago test2

4e4298cae8d2 busybox "sh" 8 hours ago Exited (137) 12 seconds ago test1

[root@zizhen02 ~]# docker rm $(docker ps -aq)

303720caaf49

3929edfaabbf

4e4298cae8d2

[root@zizhen02 ~]#

[root@zizhen02 ~]# docker run --name web -it nginx /bin/sh

##

[root@zizhen02 ~]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

5f282b674f11 nginx "/bin/sh" 15 seconds ago Up 14 seconds 80/tcp web

[root@zizhen02 ~]# docker network ls

NETWORK ID NAME DRIVER SCOPE

a5950ee18ba0 bridge bridge local

63c3ce67f785 host host local

831bb402cb76 my-bridge bridge local

04734d810393 none null local

[root@zizhen02 ~]# docker network

Usage: docker network COMMAND

Manage networks

Commands:

connect Connect a container to a network

create Create a network

disconnect Disconnect a container from a network

inspect Display detailed information on one or more networks

ls List networks

prune Remove all unused networks

rm Remove one or more networks

Run 'docker network COMMAND --help' for more information on a command.

[root@zizhen02 ~]# docker network inspect bridge

[

{

"Name": "bridge",

"Id": "a5950ee18ba0f1ab93c5ae276f3123c4d657edef17d6fad9c5c13b23f952e507",

"Created": "2019-03-19T11:33:02.336302433+08:00",

"Scope": "local",

"Driver": "bridge",

"EnableIPv6": false,

"IPAM": {

"Driver": "default",

"Options": null,

"Config": [

{

"Subnet": "172.17.0.0/16",

"Gateway": "172.17.0.1"

}

]

},

"Internal": false,

"Attachable": false,

"Ingress": false,

"ConfigFrom": {

"Network": ""

},

"ConfigOnly": false,

"Containers": {

"5f282b674f117e894241ff5a35b71c4e822531a0764c9794a9ab2f9e5d74a5f9": {

"Name": "web",

"EndpointID": "581ee02b485e99af966eae09c5c16800beb36c6800320c12a0bbd136f6c9cc82",

"MacAddress": "02:42:ac:11:00:02",

"IPv4Address": "172.17.0.2/16",

"IPv6Address": ""

}

},

"Options": {

"com.docker.network.bridge.default_bridge": "true",

"com.docker.network.bridge.enable_icc": "true",

"com.docker.network.bridge.enable_ip_masquerade": "true",

"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",

"com.docker.network.bridge.name": "docker0",

"com.docker.network.driver.mtu": "1500"

},

"Labels": {}

}

]

[root@zizhen02 ~]#

[root@zizhen02 ~]# ping 172.17.0.2

PING 172.17.0.2 (172.17.0.2) 56(84) bytes of data.

64 bytes from 172.17.0.2: icmp_seq=1 ttl=64 time=0.090 ms

64 bytes from 172.17.0.2: icmp_seq=2 ttl=64 time=0.102 ms

64 bytes from 172.17.0.2: icmp_seq=3 ttl=64 time=0.101 ms

^C

--- 172.17.0.2 ping statistics ---

3 packets transmitted, 3 received, 0% packet loss, time 1999ms

rtt min/avg/max/mdev = 0.090/0.097/0.102/0.012 ms

[root@zizhen02 ~]# ip a

1: lo: 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

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: ens33: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link/ether 00:0c:29:cb:78:e2 brd ff:ff:ff:ff:ff:ff

inet 192.168.1.107/24 brd 192.168.1.255 scope global noprefixroute ens33

valid_lft forever preferred_lft forever

inet6 fe80::20c:29ff:fecb:78e2/64 scope link

valid_lft forever preferred_lft forever

3: docker0: mtu 1500 qdisc noqueue state UP group default

link/ether 02:42:30:fa:6b:46 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

inet6 fe80::42:30ff:fefa:6b46/64 scope link

valid_lft forever preferred_lft forever

12: br-831bb402cb76: mtu 1500 qdisc noqueue state DOWN group default

link/ether 02:42:8c:b0:86:ee brd ff:ff:ff:ff:ff:ff

inet 172.18.0.1/16 brd 172.18.255.255 scope global br-831bb402cb76

valid_lft forever preferred_lft forever

inet6 fe80::42:8cff:feb0:86ee/64 scope link

valid_lft forever preferred_lft forever

22: vethc682429@if21: mtu 1500 qdisc noqueue master docker0 state UP group default

link/ether be:55:99:e1:ae:0a brd ff:ff:ff:ff:ff:ff link-netnsid 0

inet6 fe80::bc55:99ff:fee1:ae0a/64 scope link

valid_lft forever preferred_lft forever

[root@zizhen02 ~]# docker network ls

NETWORK ID NAME DRIVER SCOPE

a5950ee18ba0 bridge bridge local

63c3ce67f785 host host local

831bb402cb76 my-bridge bridge local

04734d810393 none null local

[root@zizhen02 ~]# brctl show

bridge name bridge id STP enabled interfaces

br-831bb402cb76 8000.02428cb086ee no

docker0 8000.024230fa6b46 no vethc682429

[root@zizhen02 ~]# docker network inspect bridge

[

{

"Name": "bridge",

"Id": "a5950ee18ba0f1ab93c5ae276f3123c4d657edef17d6fad9c5c13b23f952e507",

"Created": "2019-03-19T11:33:02.336302433+08:00",

"Scope": "local",

"Driver": "bridge",

"EnableIPv6": false,

"IPAM": {

"Driver": "default",

"Options": null,

"Config": [

{

"Subnet": "172.17.0.0/16",

"Gateway": "172.17.0.1"

}

]

},

"Internal": false,

"Attachable": false,

"Ingress": false,

"ConfigFrom": {

"Network": ""

},

"ConfigOnly": false,

"Containers": {

"5f282b674f117e894241ff5a35b71c4e822531a0764c9794a9ab2f9e5d74a5f9": {

"Name": "web",

"EndpointID": "581ee02b485e99af966eae09c5c16800beb36c6800320c12a0bbd136f6c9cc82",

"MacAddress": "02:42:ac:11:00:02",

"IPv4Address": "172.17.0.2/16",

"IPv6Address": ""

}

},

"Options": {

"com.docker.network.bridge.default_bridge": "true",

"com.docker.network.bridge.enable_icc": "true",

"com.docker.network.bridge.enable_ip_masquerade": "true",

"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",

"com.docker.network.bridge.name": "docker0",

"com.docker.network.driver.mtu": "1500"

},

"Labels": {}

}

]

[root@zizhen02 ~]#

[root@zizhen02 ~]# ping 172.17.0.2

PING 172.17.0.2 (172.17.0.2) 56(84) bytes of data.

64 bytes from 172.17.0.2: icmp_seq=1 ttl=64 time=0.087 ms

64 bytes from 172.17.0.2: icmp_seq=2 ttl=64 time=0.051 ms

^C

--- 172.17.0.2 ping statistics ---

2 packets transmitted, 2 received, 0% packet loss, time 999ms

rtt min/avg/max/mdev = 0.051/0.069/0.087/0.018 ms

[root@zizhen02 ~]# telnet 172.17.0.2 80

Trying 172.17.0.2...

Connected to 172.17.0.2.

Escape character is '^]'.

^CConnection closed by foreign host.

[root@zizhen02 ~]# curl https://172.17.0.2

curl: (7) Failed connect to 172.17.0.2:443; Connection refused

[root@zizhen02 ~]# curl http://172.17.0.2

Welcome to nginx!

Welcome to nginx!

If you see this page, the nginx web server is successfully installed and

working. Further configuration is required.

For online documentation and support please refer to

Commercial support is available at

Thank you for using nginx.

[root@zizhen02 ~]#

[root@zizhen02 ~]# docker run --name web -it nginx

172.17.0.1 - - [19/Mar/2019:12:08:16 +0000] "\xFF\xF4\xFF\xFD\x06" 400 157 "-" "-" "-"

172.17.0.1 - - [19/Mar/2019:12:08:43 +0000] "GET / HTTP/1.1" 200 612 "-" "curl/7.29.0" "-"

34 网络的none(安全性，容器没有IP)和host(复制本机IP)

[root@zizhen02 ~]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

[root@zizhen02 ~]# docker network ls

NETWORK ID NAME DRIVER SCOPE

d3ae3a3a685b bridge bridge local

63c3ce67f785 host host local

831bb402cb76 my-bridge bridge local

04734d810393 none null local

[root@zizhen02 ~]# docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

ubuntu-stress latest aee6e531355c 2 weeks ago 114MB

xiaoming163/python2.7-flask-hello latest b66a7f86bd45 2 weeks ago 918MB

xiaoming/centos-cmd latest 729b948e1319 2 weeks ago 202MB

xiaoming/centos-entrypoint-exec-new2 latest 249a9c95d9be 2 weeks ago 202MB

xiaoming/centos-entrypoint-shell latest 344ec38e6b59 2 weeks ago 202MB

xiaoming163/centos-vim-new latest f9f19d2bc847 2 weeks ago 335MB

ubuntu latest 94e814e2efa8 2 weeks ago 88.9MB

xiaoli163/hello-world latest a821094d0306 2 weeks ago 857kB

python 2.7 3be5dc25d0fa 3 weeks ago 914MB

nginx latest 881bd08c0b08 3 weeks ago 109MB

busybox latest d8233ab899d4 6 weeks ago 1.2MB

ubuntu 14.04 5dbc3f318ea5 2 months ago 188MB

centos latest 1e1148e4cc2c 3 months ago 202MB

[root@zizhen02 ~]# docker run -d --name test1 --network none centos /bin/sh -c "while true; do sleep 3600; done"

afbcac0fcf7bb5d9aa2ea7dd52016b63c81651cee73086c801d7167b0f0e76c9

[root@zizhen02 ~]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

afbcac0fcf7b centos "/bin/sh -c 'while t…" 8 seconds ago Up 5 seconds test1

[root@zizhen02 ~]# docker network

Usage: docker network COMMAND

Manage networks

Commands:

connect Connect a container to a network

create Create a network

disconnect Disconnect a container from a network

inspect Display detailed information on one or more networks

ls List networks

prune Remove all unused networks

rm Remove one or more networks

Run 'docker network COMMAND --help' for more information on a command.

[root@zizhen02 ~]# docker network inspect none

[

{

"Name": "none",

"Id": "04734d810393e035502143a42546df16f46c75d6b3bb9724a6d1e1fa1a06655b",

"Created": "2019-03-09T19:48:34.111853947+08:00",

"Scope": "local",

"Driver": "null",

"EnableIPv6": false,

"IPAM": {

"Driver": "default",

"Options": null,

"Config": []

},

"Internal": false,

"Attachable": false,

"Ingress": false,

"ConfigFrom": {

"Network": ""

},

"ConfigOnly": false,

"Containers": {

"afbcac0fcf7bb5d9aa2ea7dd52016b63c81651cee73086c801d7167b0f0e76c9": {

"Name": "test1",

"EndpointID": "82f126807d6be5926a656b91dfe05c4677711fa5222b28b9d0225645bbfae6eb",

"MacAddress": "",

"IPv4Address": "",

"IPv6Address": ""

}

},

"Options": {},

"Labels": {}

}

]

[root@zizhen02 ~]# docker network ls

NETWORK ID NAME DRIVER SCOPE

d3ae3a3a685b bridge bridge local

63c3ce67f785 host host local

831bb402cb76 my-bridge bridge local

04734d810393 none null local

[root@zizhen02 ~]# docker exec -it test1 /bin/sh

sh-4.2#

sh-4.2#

sh-4.2# ip a

sh: ip: command not found

sh-4.2# ifconfig

sh: ifconfig: command not found

sh-4.2# ip a

sh: ip: command not found

sh-4.2# exit

exit

[root@zizhen02 ~]# docker exec -it test1 /bin/sh ip a

/bin/sh: ip: No such file or directory

[root@zizhen02 ~]# docker stop test1

test1

[root@zizhen02 ~]# docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

afbcac0fcf7b centos "/bin/sh -c 'while t…" 5 minutes ago Exited (137) 17 seconds ago test1

[root@zizhen02 ~]# docker rm test1

test1

[root@zizhen02 ~]# docker ps -a

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

[root@zizhen02 ~]# docker run -d --name test1 --network host busybox /bin/sh -c "while true; do sleep 3600; done"

9658f41b026b65712fcd2cd05ef757a0cbd5359f05bca28511f8b5bb7d8270c7

[root@zizhen02 ~]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

9658f41b026b busybox "/bin/sh -c 'while t…" 7 seconds ago Up 5 seconds test1

[root@zizhen02 ~]# docker network inspect host

[

{

"Name": "host",

"Id": "63c3ce67f785e1d720a641f279d9dc96854a6fc83cd2a81d73b564d9a3289434",

"Created": "2019-03-09T19:48:34.125978113+08:00",

"Scope": "local",

"Driver": "host",

"EnableIPv6": false,

"IPAM": {

"Driver": "default",

"Options": null,

"Config": []

},

"Internal": false,

"Attachable": false,

"Ingress": false,

"ConfigFrom": {

"Network": ""

},

"ConfigOnly": false,

"Containers": {

"9658f41b026b65712fcd2cd05ef757a0cbd5359f05bca28511f8b5bb7d8270c7": {

"Name": "test1",

"EndpointID": "2d724f29c7c62b870b14839cb5e7c2e4a3dc9c617a108e1cb1b12aa1606202c4",

"MacAddress": "",

"IPv4Address": "",

"IPv6Address": ""

}

},

"Options": {},

"Labels": {}

}

]

[root@zizhen02 ~]# docker network ls

NETWORK ID NAME DRIVER SCOPE

d3ae3a3a685b bridge bridge local

63c3ce67f785 host host local

831bb402cb76 my-bridge bridge local

04734d810393 none null local

[root@zizhen02 ~]# docker exec -it test1 /bin/sh

/ #

/ #

/ # ip a

1: lo: 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

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: ens33: mtu 1500 qdisc pfifo_fast qlen 1000

link/ether 00:0c:29:cb:78:e2 brd ff:ff:ff:ff:ff:ff

inet 192.168.1.107/24 brd 192.168.1.255 scope global ens33

valid_lft forever preferred_lft forever

inet 192.168.1.110/24 brd 192.168.1.255 scope global secondary dynamic ens33

valid_lft 6019sec preferred_lft 6019sec

inet6 fe80::20c:29ff:fecb:78e2/64 scope link

valid_lft forever preferred_lft forever

3: br-831bb402cb76: mtu 1500 qdisc noqueue

link/ether 02:42:56:03:f8:a5 brd ff:ff:ff:ff:ff:ff

inet 172.18.0.1/16 brd 172.18.255.255 scope global br-831bb402cb76

valid_lft forever preferred_lft forever

4: docker0: mtu 1500 qdisc noqueue

link/ether 02:42:0b:b3:c0:6a 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

/ # exit

[root@zizhen02 ~]# ip a

1: lo: 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

inet6 ::1/128 scope host

valid_lft forever preferred_lft forever

2: ens33: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link/ether 00:0c:29:cb:78:e2 brd ff:ff:ff:ff:ff:ff

inet 192.168.1.107/24 brd 192.168.1.255 scope global noprefixroute ens33

valid_lft forever preferred_lft forever

inet 192.168.1.110/24 brd 192.168.1.255 scope global secondary dynamic ens33

valid_lft 6004sec preferred_lft 6004sec

inet6 fe80::20c:29ff:fecb:78e2/64 scope link

valid_lft forever preferred_lft forever

3: br-831bb402cb76: mtu 1500 qdisc noqueue state DOWN group default

link/ether 02:42:56:03:f8:a5 brd ff:ff:ff:ff:ff:ff

inet 172.18.0.1/16 brd 172.18.255.255 scope global br-831bb402cb76

valid_lft forever preferred_lft forever

4: docker0: mtu 1500 qdisc noqueue state DOWN group default

link/ether 02:42:0b:b3:c0:6a 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

[root@zizhen02 ~]#

35Docker在多容器中部署：（-e参数在容器中设置环境变量）

[root@zizhen02 ~]# mkdir flask-redis

[root@zizhen02 ~]# cd flask-redis/

[root@zizhen02 flask-redis]# pwd

/root/flask-redis

[root@zizhen02 flask-redis]# vim Dockerfile

[root@zizhen02 flask-redis]# more Dockerfile

FROM python:2.7

LABEL maintaner="Xiao ming"

COPY . /app

WORKDIR /app

RUN pip install flask redis

EXPOSE 5000

CMD [ "python","app.py" ]

[root@zizhen02 flask-redis]# ls

Dockerfile

[root@zizhen02 flask-redis]# vim app.py

[root@zizhen02 flask-redis]# more app.py

from flask import Flask

from redis import Redis

import os

import socket

app = Flask(__name__)

redis = Redis(host=os.environ.get('REDIS_HOST','127.0.0.1'), port=6379)

@app.route('/')

def hello():

redis.incr('hits')

return 'Hello Container world! I have been seen %s times and my hostname is %s.\n' % (redis.get('hit

s'),socket.gethostname())

if __name__=="__main__":

app.run(host="0.0.0.0", port=5000, debug=True)

[root@zizhen02 flask-redis]#

[root@zizhen02 flask-redis]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

9658f41b026b busybox "/bin/sh -c 'while t…" About an hour ago Up About an hour test1

[root@zizhen02 flask-redis]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

[root@zizhen02 flask-redis]# docker run -d --name redis redis

67bd34c155034966f903d2f6d446012846a996855c08fa7dc7f98c34b8addf2a

[root@zizhen02 flask-redis]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

67bd34c15503 redis "docker-entrypoint.s…" 7 seconds ago Up 4 seconds 6379/tcp redis

[root@zizhen02 flask-redis]# docker build -t xiaoming163/flask-redis

"docker build" requires exactly 1 argument.

See 'docker build --help'.

Usage: docker build [OPTIONS] PATH | URL | -

Build an image from a Dockerfile

[root@zizhen02 flask-redis]# ls

app.py Dockerfile

[root@zizhen02 flask-redis]# docker build -t xiaoming163/flask-redis .

Sending build context to Docker daemon 3.072kB

Step 1/7 : FROM python:2.7

---> 3be5dc25d0fa

Step 2/7 : LABEL maintaner="Xiao ming"

---> Running in 9d474f0860e0

Removing intermediate container 9d474f0860e0

---> 84f0c1ed87e0

Step 3/7 : COPY . /app

---> 91afb3fb25e6

Step 4/7 : WORKDIR /app

---> Running in 8e306dfce059

Removing intermediate container 8e306dfce059

---> 5bd7c1fb4f3b

Step 5/7 : RUN pip install flask redis

---> Running in a0085bc60886

DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.

Collecting flask

Downloading https://files.pythonhosted.org/packages/7f/e7/08578774ed4536d3242b14dacb4696386634607af824ea997202cd0edb4b/Flask-1.0.2-py2.py3-none-any.whl (91kB)

Collecting redis

Downloading https://files.pythonhosted.org/packages/ac/a7/cff10cc5f1180834a3ed564d148fb4329c989cbb1f2e196fc9a10fa07072/redis-3.2.1-py2.py3-none-any.whl (65kB)

Collecting itsdangerous>=0.24 (from flask)

Downloading https://files.pythonhosted.org/packages/76/ae/44b03b253d6fade317f32c24d100b3b35c2239807046a4c953c7b89fa49e/itsdangerous-1.1.0-py2.py3-none-any.whl

Collecting Jinja2>=2.10 (from flask)

Downloading https://files.pythonhosted.org/packages/7f/ff/ae64bacdfc95f27a016a7bed8e8686763ba4d277a78ca76f32659220a731/Jinja2-2.10-py2.py3-none-any.whl (126kB)

Collecting Werkzeug>=0.14 (from flask)

Downloading https://files.pythonhosted.org/packages/24/4d/2fc4e872fbaaf44cc3fd5a9cd42fda7e57c031f08e28c9f35689e8b43198/Werkzeug-0.15.1-py2.py3-none-any.whl (328kB)

Collecting click>=5.1 (from flask)

Downloading https://files.pythonhosted.org/packages/fa/37/45185cb5abbc30d7257104c434fe0b07e5a195a6847506c074527aa599ec/Click-7.0-py2.py3-none-any.whl (81kB)

Collecting MarkupSafe>=0.23 (from Jinja2>=2.10->flask)

Downloading https://files.pythonhosted.org/packages/fb/40/f3adb7cf24a8012813c5edb20329eb22d5d8e2a0ecf73d21d6b85865da11/MarkupSafe-1.1.1-cp27-cp27mu-manylinux1_x86_64.whl

Installing collected packages: itsdangerous, MarkupSafe, Jinja2, Werkzeug, click, flask, redis

Successfully installed Jinja2-2.10 MarkupSafe-1.1.1 Werkzeug-0.15.1 click-7.0 flask-1.0.2 itsdangerous-1.1.0 redis-3.2.1

Removing intermediate container a0085bc60886

---> 515d6e526f2d

Step 6/7 : EXPOSE 5000

---> Running in a1add999fcee

Removing intermediate container a1add999fcee

---> bb4895bebac6

Step 7/7 : CMD [ "python","app.py" ]

---> Running in 0e036491cdf4

Removing intermediate container 0e036491cdf4

---> ff38b69e7d87

Successfully built ff38b69e7d87

Successfully tagged xiaoming163/flask-redis:latest

[root@zizhen02 flask-redis]# docker image ls

REPOSITORY TAG IMAGE ID CREATED SIZE

xiaoming163/flask-redis latest ff38b69e7d87 14 seconds ago 919MB

oraclelinux latest 62a654b8236d 30 hours ago 235MB

python 3.6 2bb3204ab1d1 3 days ago 924MB

redis latest a55fbf438dfd 4 days ago 95MB

ubuntu-stress latest aee6e531355c 2 weeks ago 114MB

xiaoming163/python2.7-flask-hello latest b66a7f86bd45 2 weeks ago 918MB

xiaoming/centos-cmd latest 729b948e1319 2 weeks ago 202MB

xiaoming/centos-entrypoint-exec-new2 latest 249a9c95d9be 2 weeks ago 202MB

xiaoming/centos-entrypoint-shell latest 344ec38e6b59 2 weeks ago 202MB

xiaoming163/centos-vim-new latest f9f19d2bc847 2 weeks ago 335MB

ubuntu latest 94e814e2efa8 2 weeks ago 88.9MB

xiaoli163/hello-world latest a821094d0306 2 weeks ago 857kB

python 2.7 3be5dc25d0fa 3 weeks ago 914MB

nginx latest 881bd08c0b08 3 weeks ago 109MB

busybox latest d8233ab899d4 6 weeks ago 1.2MB

ubuntu 14.04 5dbc3f318ea5 2 months ago 188MB

centos latest 1e1148e4cc2c 3 months ago 202MB

[root@zizhen02 flask-redis]# docker run -d --link redis --name flask-redis -e REDIS_HOST=redis xiaoming163/flask-redis

25f34556015a9a96421494478c8375d77f052ad59a726662550616c7a62accc8

[root@zizhen02 flask-redis]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

25f34556015a xiaoming163/flask-redis "python app.py" 7 seconds ago Up 5 seconds 5000/tcp flask-redis

67bd34c15503 redis "docker-entrypoint.s…" 15 minutes ago Up 14 minutes 6379/tcp redis

[root@zizhen02 flask-redis]# docker exec -it flask-redis /bin/bash

root@25f34556015a:/app#

root@25f34556015a:/app# env

REDIS_PORT_6379_TCP_PROTO=tcp

REDIS_PORT=tcp://172.17.0.2:6379

REDIS_NAME=/flask-redis/redis

LANG=C.UTF-8

HOSTNAME=25f34556015a

REDIS_PORT_6379_TCP_ADDR=172.17.0.2

REDIS_PORT_6379_TCP=tcp://172.17.0.2:6379

GPG_KEY=C01E1CAD5EA2C4F0B8E3571504C367C218ADD4FF

PYTHONIOENCODING=UTF-8

REDIS_ENV_REDIS_DOWNLOAD_URL=http://download.redis.io/releases/redis-5.0.4.tar.gz

REDIS_HOST=redis

PWD=/app

HOME=/root

REDIS_PORT_6379_TCP_PORT=6379

TERM=xterm

REDIS_ENV_REDIS_DOWNLOAD_SHA=3ce9ceff5a23f60913e1573f6dfcd4aa53b42d4a2789e28fa53ec2bd28c987dd

REDIS_ENV_GOSU_VERSION=1.10

PYTHON_VERSION=2.7.16

SHLVL=1

PATH=/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

REDIS_ENV_REDIS_VERSION=5.0.4

PYTHON_PIP_VERSION=19.0.3

_=/usr/bin/env

root@25f34556015a:/app# ping redis

PING redis (172.17.0.2) 56(84) bytes of data.

64 bytes from redis (172.17.0.2): icmp_seq=1 ttl=64 time=0.371 ms

64 bytes from redis (172.17.0.2): icmp_seq=2 ttl=64 time=0.116 ms

64 bytes from redis (172.17.0.2): icmp_seq=3 ttl=64 time=0.119 ms

^C

--- redis ping statistics ---

3 packets transmitted, 3 received, 0% packet loss, time 2002ms

rtt min/avg/max/mdev = 0.116/0.202/0.371/0.119 ms

root@25f34556015a:/app# redis:6379

bash: redis:6379: command not found

root@25f34556015a:/app# curl 127.0.0.1:5000

Hello Container world! I have been seen 1 times and my hostname is 25f34556015a.

root@25f34556015a:/app# curl 127.0.0.1:5000

Hello Container world! I have been seen 2 times and my hostname is 25f34556015a.

root@25f34556015a:/app# curl 127.0.0.1:5000

Hello Container world! I have been seen 3 times and my hostname is 25f34556015a.

root@25f34556015a:/app# curl 127.0.0.1:5000

Hello Container world! I have been seen 4 times and my hostname is 25f34556015a.

root@25f34556015a:/app# curl 127.0.0.1:5000

Hello Container world! I have been seen 5 times and my hostname is 25f34556015a.

root@25f34556015a:/app# redis

bash: redis: command not found

root@25f34556015a:/app# exit

exit

[root@zizhen02 flask-redis]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

25f34556015a xiaoming163/flask-redis "python app.py" 4 minutes ago Up 4 minutes 5000/tcp flask-redis

67bd34c15503 redis "docker-entrypoint.s…" 18 minutes ago Up 18 minutes 6379/tcp redis

[root@zizhen02 flask-redis]# curl 127.0.0.1:5000

curl: (7) Failed connect to 127.0.0.1:5000; Connection refused

[root@zizhen02 flask-redis]#

[root@zizhen02 flask-redis]# docker stop redis

redis

[root@zizhen02 flask-redis]# docker start redis

redis

[root@zizhen02 flask-redis]# docker stop flask-redis

flask-redis

[root@zizhen02 flask-redis]# docker rm flask-redis

flask-redis

[root@zizhen02 flask-redis]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

67bd34c15503 redis "docker-entrypoint.s…" 21 minutes ago Up 53 seconds 6379/tcp redis

[root@zizhen02 flask-redis]# docker run -d -p 5000:5000 --link redis --name flask-redis -e REDIS_HOST=redis xiaoming163/flask-redis

e9508debfcf81e0acfbc77165c92a97d162764c65e306da013b6df25f9aa7070

[root@zizhen02 flask-redis]#

[root@zizhen02 flask-redis]# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

e9508debfcf8 xiaoming163/flask-redis "python app.py" 6 seconds ago Up 4 seconds 0.0.0.0:5000->5000/tcp flask-redis

67bd34c15503 redis "docker-entrypoint.s…" 21 minutes ago Up About a minute 6379/tcp redis

[root@zizhen02 flask-redis]# curl 127.0.0.1:5000

Hello Container world! I have been seen 6 times and my hostname is e9508debfcf8.

[root@zizhen02 flask-redis]# curl 127.0.0.1:5000

Hello Container world! I have been seen 7 times and my hostname is e9508debfcf8.

[root@zizhen02 flask-redis]# curl 127.0.0.1:5000

Hello Container world! I have been seen 8 times and my hostname is e9508debfcf8.

[root@zizhen02 flask-redis]# curl 127.0.0.1:5000

Hello Container world! I have been seen 9 times and my hostname is e9508debfcf8.

[root@zizhen02 flask-redis]# curl 127.0.0.1:5000

Hello Container world! I have been seen 10 times and my hostname is e9508debfcf8.

[root@zizhen02 flask-redis]#

-e 参数的使用

[root@zizhen02 ~]# docker run -d --name test2 -e PENG=xiaoming busybox /bin/sh -c "while true; do sleep 3600; done"

a5de8377b6259dc336168f1ea7e58ee5cc6181089230b5bc33ed7d9d686c2eaf

[root@zizhen02 ~]# docker exec -it test2 /bin/sh

/ # env

HOSTNAME=a5de8377b625

SHLVL=1

HOME=/root

TERM=xterm

PENG=xiaoming

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

PWD=/

/ # exit

[root@zizhen02 ~]#

[root@zizhen02 ~]#

[root@zizhen02 ~]# docker run -d --name test3 -e PENG=lili busybox /bin/sh -c "while true; do sleep 3600; done"

c51f1e7cb1d6babcdd13c75f49ca49de8b7256ed7a53497af63737ec6d3313df

[root@zizhen02 ~]# docker exec -it test3 /bin/sh

/ #

/ # env

HOSTNAME=c51f1e7cb1d6

SHLVL=1

HOME=/root

TERM=xterm

PENG=lili

PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

PWD=/

/ #

36，37 Docke overlay网络和etcd通信

转载于:https://www.cnblogs.com/weizitianming/p/10707095.html

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