LVS 集群中持久连接详解(PPC+PCC+PNMPP)

大纲

一、引子(案例)

二、持久连接定义与原理

三、持久连接分类

四、持久连接命令

五、LVS-DR模式

六、PPC 演示

七、PCC 演示

八、PNMP 演示

注:实验环境,操作系统 CentOS 6.4 X86_64

一、引子(案例)

对于电子商务网站来说,用户在挑选商品的时候使用的是80端口来浏览的,当付款的时候则是通过443的ssl加密的方式,当然当用户挑选完商品付款的时候,我们当然不希望https的443跳转到另外一台REAL SERVER上,很显然应该是同一REAL SERVER才对,这时候就要用到基于防火墙标记的持久连接,通过定义端口的姻亲关系来实现。在生产环境中用的最多的也是PNMP即基于防火墙标记的持久连接。好了引子就说到这下面我们就来详细说说LVS的持久连接……

二、持久连接定义与原理

1.定义

持久连接是指无论使用什么算法,LVS持久都能实现在一定时间内,将来自同一个客户端请求派发至此前选定的RS。

2.原理

当使用LVS持久性的时候,Director在内部使用一个连接根据记录称之为“持久连接模板”来确保所有来自同一个客户端的请求被分发到同一台Real Server上。

说明:持久连接模板是指每一个客户端 及分配给它的RS的映射关系;

三、持久连接分类

1.PPC(Persistent Port Connections):将来自于同一个客户端对同一个集群服务的请求,始终定向至此前选定的RS;(持久端口连接)

例如:client---->LVS(80)---->RS1 或 client---->LVS(23)---->RS2

缺陷:期望访问不同的端口到同一台RS上,无法实现。

配置:

ipvsadm -A -t 172.16.100.1:80 -s rr -p 3600
ipvsadm -a -t 172.16.100.1:80 -r 172.16.100.10 -g -w 2
ipvsadm -a -t 172.16.100.1:80 -r 172.16.100.11 -g -w 2

2.PCC(Persistent Client Connections):将来自于同一个客户端对所有端口的请求,始终定向至此前选定的RS;(持久客户端连接)

说明:PCC是一个虚拟服务没有端口号(或者端口号为0),以"-p" 来标识服务。

缺陷:定向所有服务,期望访问不同的Real Server无法实现。

配置:

ipvsadm -A -t 172.16.100.1:0 -s rr -p 3600
ipvsadm -a -t 172.16.100.1:0 -r 172.16.100.10 -g -w 2
ipvsadm -a -t 172.16.100.1:0 -r 172.16.100.11 -g -w 2

3.PNMPP(Persistent Netfilter Marked Packet Persistence):持久防火墙标记连接,根据iptables 的规则,将对于某类服务几个不同端口的访问定义为一类;

先对某一特定类型的数据包打上标记,然后再将基于某一类标记的服务送到后台的Real Server上去,后台的Real Server 并不识别这些标记。将持久和防火墙标记结合起来就能够实现端口姻亲功能,只要是来自某一客户端的对某一特定服务(需要不同的端口)的访问都定义到同一台Real Server上去。

案例:一个用户在访问购物网站时同时使用HTTP(80)和HTTPS(443)两种协议,我们需要将其定义到同一台Real Server上,而其他的服务不受限制。

配置:

iptables -t mangle -A PREROUTING -d 172.16.100.1 -i eth0 -p tcp --dport 80 -j MARK --set-mark 8
iptables -t mangle -A PREROUTING -d 172.16.100.1 -i eth0 -p tcp --dport 443 -j MARK --set-mark 8
ipvsadm -A -f 8 -s rr -p 600
ipvsadm -a -f 8 -r 172.16.100.10 -g -w 2
ipvsadm -a -f 8 -r 172.16.100.11 -g -w 1

四、持久连接命令

ipvsadm -A|E … -p timeout
选项
-p timeout 指定持久连接时长,默认为360秒,单位是秒,即6分钟。

五、LVS-DR模式

1.实验效果图

Lvs-DR

2.具体说明

虚拟机

说明: 这里有四台虚拟机,一台Director,两台Real Server,一台CA证书颁发机构(在演示PNMP时用到),所以有虚拟机都是单网卡!所有的网卡模式都是NAT模式,方便与本机进行测试!

3.配置Director

(1).配置ip地址

eth0 172.16.100.2 DIP  
eth0:0 172.16.100.1 VIP

(2).查看

[root@master ~]# ifconfig  
eth0      Link encap:Ethernet  HWaddr 00:0C:29:E5:AE:A1
          inet addr:172.16.100.2  Bcast:172.16.100.255  Mask:255.255.255.0   
          inet6 addr: fe80::20c:29ff:fee5:aea1/64 Scope:Link   
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1   
          RX packets:226 errors:0 dropped:0 overruns:0 frame:0   
          TX packets:143 errors:0 dropped:0 overruns:0 carrier:0   
          collisions:0 txqueuelen:1000   
          RX bytes:21199 (20.7 KiB)  TX bytes:15679 (15.3 KiB)
eth0:0    Link encap:Ethernet  HWaddr 00:0C:29:E5:AE:A1
          inet addr:172.16.100.1  Bcast:172.16.100.255  Mask:255.255.255.0   
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0   
          inet6 addr: ::1/128 Scope:Host   
          UP LOOPBACK RUNNING  MTU:16436  Metric:1   
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0   
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0   
          collisions:0 txqueuelen:0   
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

4.配置Real Server 1

RS1:    

eth0: 172.16.100.10 RIP   
lo0:0 172.16.100.1 VIP

(1).关闭arp响应

[root@rs1 ~]# sysctl -w net.ipv4.conf.eth0.arp_announce=2  
[root@rs1 ~]# sysctl -w net.ipv4.conf.all.arp_announce=2   
[root@rs1 ~]# echo 1 > /proc/sys/net/ipv4/conf/eth0/arp_ignore   
[root@rs1 ~]# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore

(2).配置VIP

[root@rs1 ~]# ifconfig lo:0 172.16.100.1 broadcast 172.16.100.1 netmask 255.255.255.255 up
[root@rs1 ~]# ifconfig  
eth0      Link encap:Ethernet  HWaddr 00:0C:29:91:45:90
          inet addr:172.16.100.10  Bcast:172.16.100.255  Mask:255.255.255.0   
          inet6 addr: fe80::20c:29ff:fe91:4590/64 Scope:Link   
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1   
          RX packets:735 errors:0 dropped:0 overruns:0 frame:0   
          TX packets:528 errors:0 dropped:0 overruns:0 carrier:0   
          collisions:0 txqueuelen:1000   
          RX bytes:66150 (64.5 KiB)  TX bytes:75461 (73.6 KiB)
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0   
          inet6 addr: ::1/128 Scope:Host   
          UP LOOPBACK RUNNING  MTU:16436  Metric:1   
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0   
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0   
          collisions:0 txqueuelen:0   
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
lo:0      Link encap:Local Loopback
          inet addr:172.16.100.1  Mask:255.255.255.255   
          UP LOOPBACK RUNNING  MTU:16436  Metric:1

(3).增加路由

[root@rs1 ~]# route add -host 172.16.100.1 dev lo:0
[root@rs1 ~]# route  
Kernel IP routing table   
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface   
172.16.100.1    *               255.255.255.255 UH    0      0        0 lo   
172.16.100.0    *               255.255.255.0   U     0      0        0 eth0   
link-local      *               255.255.0.0     U     1002   0        0 eth0

(4).安装httpd

[root@rs1 ~]# yum install -y httpd
[root@rs1 ~]# vim /var/www/html/index.html #增加测试页面
rs1.test.com

效果1

5.配置Real Server 2

RS2:    

eth0: 172.16.100.11 RIP
lo0:0 172.16.100.1 VIP

(1).关闭arp响应

sysctl -w net.ipv4.conf.eth0.arp_announce=2  
sysctl -w net.ipv4.conf.all.arp_announce=2   
echo 1 > /proc/sys/net/ipv4/conf/eth0/arp_ignore   
echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore

(2).配置VIP

[root@rs2 ~]# ifconfig lo:0 172.16.100.1 broadcast 172.16.100.1 netmask 255.255.255.255 up
[root@rs2 ~]# ifconfig  
eth0      Link encap:Ethernet  HWaddr 00:0C:29:61:92:17
          inet addr:172.16.100.11  Bcast:172.16.100.255  Mask:255.255.255.0   
          inet6 addr: fe80::20c:29ff:fe61:9217/64 Scope:Link   
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1   
          RX packets:413 errors:0 dropped:0 overruns:0 frame:0   
          TX packets:170 errors:0 dropped:0 overruns:0 carrier:0   
          collisions:0 txqueuelen:1000   
          RX bytes:37254 (36.3 KiB)  TX bytes:19865 (19.3 KiB)
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0   
          inet6 addr: ::1/128 Scope:Host   
          UP LOOPBACK RUNNING  MTU:16436  Metric:1   
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0   
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0   
          collisions:0 txqueuelen:0   
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
lo:0      Link encap:Local Loopback
          inet addr:172.16.100.1  Mask:255.255.255.255   
          UP LOOPBACK RUNNING  MTU:16436  Metric:1

(3).增加路由

[root@rs2 ~]# route add -host 172.16.100.1 dev lo:0
[root@rs2 ~]# route  
Kernel IP routing table   
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface   
172.16.100.1    *               255.255.255.255 UH    0      0        0 lo   
172.16.100.0    *               255.255.255.0   U     0      0        0 eth0   
link-local      *               255.255.0.0     U     1002   0        0 eth0

(4).安装httpd

[root@rs2 ~]# yum install -y httpd
[root@rs2 ~]# vim /var/www/html/index.html #增加测试页面
rs2.test.com

效果2

6.配置LVS-DR

[root@master ~]# yum install -y ipvsadm
[root@master ~]# ipvsadm -A -t 172.16.100.1:80 -s rr #为了演示效果我这里用了rr调度算法  
[root@master ~]# ipvsadm -a -t 172.16.100.1:80 -r 172.16.100.10 -g  -w 1   
[root@master ~]# ipvsadm -a -t 172.16.100.1:80 -r 172.16.100.11 -g  -w 1   
[root@master ~]# ipvsadm -L -n   
IP Virtual Server version 1.2.1 (size=4096)   
Prot LocalAddress:Port Scheduler Flags   
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn   
TCP  172.16.100.1:80 rr   
  -> 172.16.100.10:80             Route   1      0          0       
  -> 172.16.100.11:80             Route   1      0          0

7.测试

[root@master ~]# ipvsadm -L -n  
IP Virtual Server version 1.2.1 (size=4096)   
Prot LocalAddress:Port Scheduler Flags   
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn   
TCP  172.16.100.1:80 rr   
  -> 172.16.100.10:80             Route   1      0          12      
  -> 172.16.100.11:80             Route   1      0          12

效果3

效果4

准备工作全部完成下面我们来演示LVS持久连接功能!

六、PPC 演示

1.配置持久连接为3600秒

[root@master ~]# ipvsadm -E -t 172.16.100.1:80 -s rr -p 3600

2.查看持久连接    

[root@master ~]# ipvsadm -L -n   
IP Virtual Server version 1.2.1 (size=4096)   
Prot LocalAddress:Port Scheduler Flags   
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn   
TCP  172.16.100.1:80 rr persistent 3600   
  -> 172.16.100.10:80             Route   1      0          0       
  -> 172.16.100.11:80             Route   1      0          0

3.测试持久连接

[root@master ~]# ipvsadm -L -n  
IP Virtual Server version 1.2.1 (size=4096)   
Prot LocalAddress:Port Scheduler Flags   
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn   
TCP  172.16.100.1:80 rr persistent 3600   
  -> 172.16.100.10:80             Route   1      0          0       
  -> 172.16.100.11:80             Route   1      0          37

效果4

大家可以看到,不断的刷新,请求始终在Real Server 2上! 说明,lvs持久连接 PPC 模式测试成功,下面我们继续

4.在Real Server 1与Real Server2 上开启telnet 与 ssh 并做成集群

(1).安装telnet服务

RS1:

[root@rs1 ~]# yum install -y telnet*
[root@rs1 ~]# vim /etc/xinetd.d/telnet
# default: on  
# description: The telnet server serves telnet sessions; it uses \   
#       unencrypted username/password pairs for authentication.   
service telnet   
{   
        flags           = REUSE   
        socket_type     = stream   
        wait            = no   
        user            = root   
        server          = /usr/sbin/in.telnetd   
        log_on_failure  += USERID   
        disable         = no #将yes改为no   
}
[root@rs1 ~]# service xinetd restart
[root@rs1 ~]# netstat -ntulp | grep :23  
tcp        0      0 :::23                       :::*                        LISTEN      2149/xinetd

RS2:

[root@rs ~]# yum install -y telnet*
[root@rs2 ~]# vim /etc/xinetd.d/telnet
# default: on  
# description: The telnet server serves telnet sessions; it uses \   
#       unencrypted username/password pairs for authentication.   
service telnet   
{   
        flags           = REUSE   
        socket_type     = stream   
        wait            = no   
        user            = root   
        server          = /usr/sbin/in.telnetd   
        log_on_failure  += USERID   
        disable         = no #将yes改为no   
}
[root@rs2 ~]# service xinetd restart
[root@rs2 ~]# netstat -ntulp | grep :23  
tcp        0      0 :::23                       :::*                        LISTEN      2149/xinetd

(2).增加user

说明:由于telnet服务是拒绝root用户登录的,所以我们增加一个free的用户,密码为123456

RS1:

[root@rs1 ~]# useradd free  
[root@rs1 ~]# passwd free   
更改用户 free 的密码 。   
新的 密码:   
无效的密码: 过于简单化/系统化   
无效的密码: 过于简单   
重新输入新的 密码:   
passwd: 所有的身份验证令牌已经成功更新。

RS2:

[root@rs2 ~]# useradd free  
[root@rs2 ~]# passwd free   
更改用户 free 的密码 。   
新的 密码:   
无效的密码: 过于简单化/系统化   
无效的密码: 过于简单   
重新输入新的 密码:   
passwd: 所有的身份验证令牌已经成功更新。

(3).增加集群服务

[root@master ~]# ipvsadm -A -t 172.16.100.1:80 -s rr -p 600  
[root@master ~]# ipvsadm -a -t 172.16.100.1:80 -r 172.16.100.10 -g   
[root@master ~]# ipvsadm -a -t 172.16.100.1:80 -r 172.16.100.11 -g
[root@master ~]# ipvsadm -A -t 172.16.100.1:23 -s rr -p 600  
[root@master ~]# ipvsadm -a -t 172.16.100.1:23 -r 172.16.100.10 -g   
[root@master ~]# ipvsadm -a -t 172.16.100.1:23 -r 172.16.100.11 -g
[root@master ~]# ipvsadm -A -t 172.16.100.1:22 -s rr -p 600  
[root@master ~]# ipvsadm -a -t 172.16.100.1:22 -r 172.16.100.10 -g   
[root@master ~]# ipvsadm -a -t 172.16.100.1:22 -r 172.16.100.11 �Cg

(4).测试

[root@master ~]# ipvsadm -L -n  
IP Virtual Server version 1.2.1 (size=4096)   
Prot LocalAddress:Port Scheduler Flags   
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn   
TCP  172.16.100.1:22 rr persistent 600   
  -> 172.16.100.10:22             Route   1      2         0       
  -> 172.16.100.11:22             Route   1      4          0       
TCP  172.16.100.1:23 rr persistent 600   
  -> 172.16.100.10:23             Route   1      3          0       
  -> 172.16.100.11:23             Route   1      6          0       
TCP  172.16.100.1:80 rr persistent 600   
  -> 172.16.100.10:80             Route   1      0          0       
  -> 172.16.100.11:80             Route   1      0          39

总结,以上测试证明了,PPC模式的缺点,期望访问不同的端口到同一台Real Server上,无法实现。

七、PCC 演示

1.清空所有规则

root@master ~]# ipvsadm -C  
[root@master ~]# ipvsadm -L -n   
IP Virtual Server version 1.2.1 (size=4096)   
Prot LocalAddress:Port Scheduler Flags   
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

2.配置PCC模式规则

[root@master ~]# ipvsadm -A -t 172.16.100.1:0 -s rr -p 600  
[root@master ~]# ipvsadm -a -t 172.16.100.1:0 -r 172.16.100.10 -g   
[root@master ~]# ipvsadm -a -t 172.16.100.1:0 -r 172.16.100.11 -g

3.查看

[root@master ~]# ipvsadm -L -n  
IP Virtual Server version 1.2.1 (size=4096)   
Prot LocalAddress:Port Scheduler Flags   
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn   
TCP  172.16.100.1:0 rr persistent 600   
  -> 172.16.100.10:0              Route   1      0          0       
  -> 172.16.100.11:0              Route   1      0          0

4.测试

效果4

效果5

[root@master ~]# ipvsadm -L -n  
IP Virtual Server version 1.2.1 (size=4096)   
Prot LocalAddress:Port Scheduler Flags   
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn   
TCP  172.16.100.1:0 rr persistent 600   
  -> 172.16.100.10:0              Route   1      0          0       
  -> 172.16.100.11:0              Route   1      3          1

总结:以上测试证明了,PCC的缺点,定向所有服务到同一台Real Server上,期望访问不同的Real Server上,无法实现。

八、PNMP 演示(常用

说明:对于电子商务网站来说,用户在挑选商品的时候使用的是80端口来浏览的,当付款的时候则是通过443的ssl加密的方式,当然当用户挑选完商品付款的时候我们当然不希望https的443跳转到另外一台REALSERVER,很显然应该是同一REALSERVER才对,这时候就要用到基于防火墙标记的持久连接,通过定义端口的姻亲关系来实现。

1.配置CA证书颁发机构

(1).修改openssl配置文件

[root@ca ~]# vim /etc/pki/tls/openssl.cnf
dir = /etc/pki/CA #工作目录 ,此处需要指定,不然给客户到签证的时候必须在特定的目录下才能实现 
certs = $dir/certs #客户端证书目录  
crl_dir = $dir/crl #证书吊销列表  
database = $dir/index.txt #证书记录信息
new_certs_dir = $dir/newcerts #新生成证书的目录 
certificate = $dir/cacert.pem #CA自己的证书位置  
serial = $dir/serial #序列号  
crlnumber = $dir/crlnumbe #证书吊销列表序列号
crl = $dir/crl.pem #证书吊销列表文件 
private_key = $dir/private/cakey.pem #CA自己的私钥  
RANDFILE = $dir/private/.rand #随机数文件
[ req_distinguished_name ] 
countryName                     = Country Name (2 letter code)  
countryName_default             = CN #国家  
countryName_min                 = 2  
countryName_max                 = 2
stateOrProvinceName             = State or Province Name (full name) 
stateOrProvinceName_default     = shanghai #省份
localityName                    = Locality Name (eg, city) 
localityName_default            = xujiahui #地区
0.organizationName              = Organization Name (eg, company) 
0.organizationName_default      = jjhh #公司名称
organizationalUnitName          = Organizational Unit Name (eg, section)
organizationalUnitName_default  =tech #所在部门
:wq #保存退出
[root@ca ~]# cd /etc/pki/CA/
[root@ca CA]# ll 
总用量 16  
drwxr-xr-x. 2 root root 4096 2月  22 07:45 certs  
drwxr-xr-x. 2 root root 4096 2月  22 07:45 crl  
drwxr-xr-x. 2 root root 4096 2月  22 07:45 newcerts  
drwx------. 2 root root 4096 2月  22 07:45 private

(2).生成密钥与证书

[root@ca CA]# (umask 077; openssl genrsa -out private/cakey.pem 2048) #生成密钥 
Generating RSA private key, 2048 bit long modulus  
..............................+++  
..................................................+++  
e is 65537 (0x10001)
[root@ca CA]# openssl req -new -x509 -key private/cakey.pem -out cacert.pem #生成自签证书 
You are about to be asked to enter information that will be incorporated  
into your certificate request.  
What you are about to enter is what is called a Distinguished Name or a DN.  
There are quite a few fields but you can leave some blank  
For some fields there will be a default value,  
If you enter '.', the field will be left blank.  
-----  
Country Name (2 letter code) [CN]:  
State or Province Name (full name) [shanghai]:  
Locality Name (eg, city) [xujiahui]:  
Organization Name (eg, company) [jjhh]:  
Organizational Unit Name (eg, section) [tech]:  
Common Name (eg, your name or your server's hostname) []:rs.test.com     
Email Address []:admin.test.com
[root@ca CA]# touch index.txt #新建索引文件
[root@ca CA]# touch serial #建立序列号文件  
[root@ca CA]# echo 01 > serial #写入起始序列号

2.RS1与RS2申请证书

RS1:

(1).生成证书申请

[root@rs1 ~]# cd /etc/httpd #web服务器的配置目录  
[root@rs1 ~]# mkdir ssl #创建ssl目录
[root@rs1 ~]# cd ssl #每一种服务要想使用证书,必须有私钥,每一种应用都需要自己的证书
[root@rs1 ssl]# (umask 077; openssl genrsa -out httpd.key 1024)#给自己生成密钥 
-bash: (umask: command not found  
Generating RSA private key, 1024 bit long modulus  
............++++++  
...................................................++++++  
e is 65537 (0x10001)  
[root@rs1 ssl]# ll  
总用量 4  
-rw-r--r-- 1 root root 887 7月  29 00:36 httpd.key  
[root@rs1 ssl]# openssl req -new -key httpd.key -out httpd.csr #证书签署请求文件,机构和其他名字必须和CA颁发机构上的一样  
You are about to be asked to enter information that will be incorporated  
into your certificate request.  
What you are about to enter is what is called a Distinguished Name or a DN.  
There are quite a few fields but you can leave some blank  
For some fields there will be a default value,  
If you enter '.', the field will be left blank.  
-----  
Country Name (2 letter code) [XX]:CN  
State or Province Name (full name) []:shanghai  
Locality Name (eg, city) [Default City]:xujiahui  
Organization Name (eg, company) [Default Company Ltd]:jjhh  
Organizational Unit Name (eg, section) []:tech  
Common Name (eg, your name or your server's hostname) []:rs.test.com  
Email Address []:admin.test.com    
Please enter the following 'extra' attributes 
to be sent with your certificate request  
A challenge password []:  
An optional company name []:

(2).将证书申请发送到CA颁发机构上  

[root@rs1 ssl]# scp ./httpd.csr [email protected]:/tmp

(3).CA颁发机构,签名并签发证书

[root@ca CA]# cd /tmp/ 
[root@ca tmp]# ls  
httpd.csr
[root@ca tmp]# openssl ca -in httpd.csr -out httpd.crt -days 3650 #签发证书的有效期为10年  
Using configuration from /etc/pki/tls/openssl.cnf  
Check that the request matches the signature  
Signature ok  
Certificate Details:  
        Serial Number: 1 (0x1)  
        Validity  
            Not Before: Jul 28 15:53:01 2013 GMT  
            Not After : Jul 26 15:53:01 2023 GMT  
        Subject:  
            countryName               = CN  
            stateOrProvinceName       = shanghai  
            organizationName          = jjhh  
            organizationalUnitName    = tech  
            commonName                = rs.test.com  
            emailAddress              = admin.test.com  
        X509v3 extensions:  
            X509v3 Basic Constraints:   
                CA:FALSE  
            Netscape Comment:   
                OpenSSL Generated Certificate  
            X509v3 Subject Key Identifier:   
                68:9C:B1:46:ED:24:6A:2D:94:C6:89:21:0B:D0:CE:D5:C7:70:A6:75  
            X509v3 Authority Key Identifier:   
                keyid:E2:98:87:A6:76:F5:47:84:48:68:68:F9:DF:C1:0C:AD:4C:B9:30:61
Certificate is to be certified until Jul 26 15:53:01 2023 GMT (3650 days) 
Sign the certificate? [y/n]:y
1 out of 1 certificate requests certified, commit? [y/n]y
Write out database with 1 new entries  
Data Base Updated  
[root@ca tmp]# ll  
总用量 8  
-rw-r--r--  1 root root 3825 7月  28 23:53 httpd.crt  
-rw-r--r--  1 root root  692 7月  28 23:52 httpd.csr

(4).将生成的证书复制到Real Server 1上

[root@ca tmp]# scp ./httpd.crt [email protected]:/etc/httpd/ssl/httpd.crt

(5).查看收到的证书

[root@rs1 ssl]# ll 
总用量 12  
-rw-r--r-- 1 root root 3825 7月  29 00:47 httpd.crt  
-rw-r--r-- 1 root root  692 7月  29 00:37 httpd.csr  
-rw-r--r-- 1 root root  887 7月  29 00:36 httpd.key

RS2:(同RS1操作一致,我们就不重复演示了,这里使用一个简单的方法,直接复制RS1的证书)

[root@rs2 ~]# cd /etc/httpd #web服务器的配置目录 
[root@rs2 ~]# mkdir ssl #创建ssl目录
[root@rs2 ssl]# scp [email protected]:/etc/httpd/ssl/* ./ 
[email protected]'s password:   
httpd.crt                                                                               100% 3825     3.7KB/s   00:00  
httpd.csr                                                                               100%  692     0.7KB/s   00:00  
httpd.key                                                                               100%  887     0.9KB/s   00:00  
[root@rs2 ssl]# ll  
总用量 12  
-rw-r--r-- 1 root root 3825 7月  29 00:27 httpd.crt  
-rw-r--r-- 1 root root  692 7月  29 00:27 httpd.csr  
-rw-r--r-- 1 root root  887 7月  29 00:27 httpd.key

好了,现在RS1与RS2都有证书了,下面我们继续!

3.配置RS1与RS2支持SSL

RS1:

(1).安装httpd和ssl联系的装载模块mod_ssl

[root@rs1 ssl]# yum install -y mod_ssl

(2).修改ssl配置文件

[root@rs1 ssl]# vim /etc/httpd/conf.d/ssl.conf
SSLCertificateFile /etc/httpd/ssl/httpd.crt #指定证书位置
SSLCertificateKeyFile /etc/httpd/ssl/httpd.key #指定key位置

(3).重启httpd

[root@rs1 ssl]# service httpd restart

(4).查看443端口

[root@rs1 ssl]# netstat  -ntulp | grep :443 
tcp        0      0 :::443                      :::*                        LISTEN      1226/httpd

RS2:

(1).安装httpd和ssl联系的装载模块mod_ssl

[root@rs2 ssl]# yum install -y mod_ssl

(2).修改ssl配置文件

[root@rs2 ssl]# vim /etc/httpd/conf.d/ssl.conf
SSLCertificateFile /etc/httpd/ssl/httpd.crt #指定证书位置
SSLCertificateKeyFile /etc/httpd/ssl/httpd.key #指定key位置

(3).重启httpd

[root@rs2 ssl]# service httpd restart

(4).查看443端口

[root@rs2 ssl]# netstat  -ntulp | grep :443 
tcp        0      0 :::443                      :::*                        LISTEN      1226/httpd

简单测试一下:

https1https2

大家可以看到测试成功,没有问题,下面我们继续!

4.清除所有LVS规则

[root@master ~]# ipvsadm -C 
[root@master ~]# ipvsadm -L -n  
IP Virtual Server version 1.2.1 (size=4096)  
Prot LocalAddress:Port Scheduler Flags  
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn

5.定义端口的姻亲关系,给80和443端口打上同样的防火墙标记  

[root@master ~]# iptables -t mangle -A PREROUTING -d 172.16.100.1 -i eth0 -p tcp --dport 80 -j MARK --set-mark 8  
[root@master ~]# iptables -t mangle -A PREROUTING -d 172.16.100.1 -i eth0 -p tcp --dport 443 -j MARK --set-mark 8

6.配置实现基于防火墙标记的LVS

[root@master ~]# ipvsadm -A -f 8 -s rr -p 600 
[root@master ~]# ipvsadm -a -f 8 -r 172.16.100.10 -g   
[root@master ~]# ipvsadm -a -f 8 -r 172.16.100.11 -g   
[root@master ~]# ipvsadm -L -n  
IP Virtual Server version 1.2.1 (size=4096)  
Prot LocalAddress:Port Scheduler Flags  
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn  
FWM  8 rr persistent 600  
  -> 172.16.100.10:0              Route   1      0          0       
  -> 172.16.100.11:0              Route   1      0          0

7.测试

[root@master ~]# ipvsadm -L -n 
IP Virtual Server version 1.2.1 (size=4096)  
Prot LocalAddress:Port Scheduler Flags  
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn  
FWM  8 rr persistent 600  
  -> 172.16.100.10:0              Route   1      0          0       
  -> 172.16.100.11:0              Route   1      0          102

效果4

从上面我们可以看出由于持久连接,我们始终访问在Real Server 2上,下面我们测试一下https效果,

[root@master ~]# ipvsadm -L -n 
IP Virtual Server version 1.2.1 (size=4096)  
Prot LocalAddress:Port Scheduler Flags  
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn  
FWM  8 rr persistent 600  
  -> 172.16.100.10:0              Route   1      0          0       
  -> 172.16.100.11:0              Route   1      0          160

https3

大家可以看到,我们访问https时,也始终访问Real Server 2上,嘿嘿……到此所有演示全部完成!^_^……


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