LVS/DR模型及持久连接

不信网恋

　　

　　

HostName	AddressIP	Role	VirtualIP DEV
LVS/DR	192.168.1.150/24	LVS,CA	eth0:0 192.168.1.250
node2	192.168.1.120/24	RealServer(httpd)	lo:0 192.168.1.250
node3	192.168.1.130/24	RealServer(httpd)	lo:0 192.168.1.250

　　1)DR模型配置前的准备
　　两RealServer配置如下（一摸一样）：
[root@node2 ~]# echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore
[root@node2 ~]# echo 1 > /proc/sys/net/ipv4/conf/all/arp_ignore
[root@node2 ~]# echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce
[root@node2 ~]# echo 2 > /proc/sys/net/ipv4/conf/all/arp_announce
[root@node2 ~]# ifconfig lo:0 192.168.1.250 broadcast 192.168.1.250 netmask 255.255.255.255 up
[root@node2 ~]# route add -host 192.168.1.250 dev lo:0
[root@node2 ~]# ifconfig lo:0
lo:0      Link encap:Local Loopback  
          inet addr:192.168.1.250  Mask:255.255.255.255
          UP LOOPBACK RUNNING  MTU:16436  Metric:1　　LVS/DR配置

[root@LVS/DR ~]# ifconfig eth0:0 192.168.1.250 broadcast 192.168.1.250 netmask 255.255.255.255 up
[root@LVS/DR ~]# route add -host 192.168.1.250 dev eth0:0　　2）Apache安装好了验证是否能够访问（安装过程略）
[root@LVS/DR ~]# curl 192.168.1.120
ipvsadm 2
[root@LVS/DR ~]# curl 192.168.1.130
ipvsadm 3　　3）创建负载均衡群集

[root@LVS/DR ~]# ipvsadm -A -t 192.168.1.250:80 -s rr
[root@LVS/DR ~]# ipvsadm -a -t 192.168.1.250:80 -r 192.168.1.120 -g
[root@LVS/DR ~]# ipvsadm -a -t 192.168.1.250:80 -r 192.168.1.130 -g
[root@LVS/DR ~]# ipvsadm -L -n
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
TCP  192.168.1.250:80 rr
  -> 192.168.1.120:80             Route   1      0          0         
  -> 192.168.1.130:80             Route   1      0          0　　验证群集是否配置成功

　　到此一个简单的DR模型就配置成功了

　　配置持久连接这里我们将80,443端口绑定在一起这就会用mangle搭上一个标记
　　5）安装mod_ssl模块
　　[root@node3 ~]# yum install mod_ssl
　　6）申请证书
1 创建CA证书颁发机构
[root@LVS/DR CA]# (umask 077;openssl genrsa 1024 > private/cakey.pem)  创建私钥
Generating RSA private key, 1024 bit long modulus
.................................++++++
..................................++++++
e is 65537 (0x10001)
自签证书
[root@LVS/DR CA]# openssl req -new -x509 -key private/cakey.pem -out cacert.pem -days 365
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) []:CQ
Locality Name (eg, city) [Default City]:chongqing
Organization Name (eg, company) [Default Company Ltd]:MT
Organizational Unit Name (eg, section) []:teach
Common Name (eg, your name or your server's hostname) []:ca.mictiger.com
Email Address []:
[root@LVS/DR CA]# ls
cacert.pem  certs  crl  newcerts  private
[root@LVS/DR CA]# touch index.txt
[root@LVS/DR CA]# touch serial
[root@LVS/DR CA]# echo 01 > serial
2 RealServer生成证书签署请求
生成私钥
[root@node3 conf]# mkdir ssl
[root@node3 ssl]# (umask 077;openssl genrsa 1024 > apache.key)
Generating RSA private key, 1024 bit long modulus
................++++++
....++++++
e is 65537 (0x10001)
证书签署请求
[root@node3 ssl]# openssl req -new -key apache.key -out apache.csr
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) []:CQ
Locality Name (eg, city) [Default City]:chongqing
Organization Name (eg, company) [Default Company Ltd]:MT
Organizational Unit Name (eg, section) []:teach
Common Name (eg, your name or your server's hostname) []:192.168.1.250
Email Address []:
Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:
An optional company name []:
scp apache.csr root@192.168.1.150:/tmp
3 CA签署证书
[root@LVS/DR tmp]# openssl ca -in apache.csr -out apache.crt -days 365
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: Nov 23 04:53:26 2014 GMT
            Not After : Nov 23 04:53:26 2015 GMT
        Subject:
            countryName               = CN
            stateOrProvinceName       = CQ
            organizationName          = MT
            organizationalUnitName    = teach
            commonName                = 192.168.1.250
        X509v3 extensions:
            X509v3 Basic Constraints:
                CA:FALSE
            Netscape Comment:
                OpenSSL Generated Certificate
            X509v3 Subject Key Identifier:
                22:5E:3C:6D:27:5A:94:9A:E7:F2:35:0F:76:5A:C0:D6:80:1F:E7:8E
            X509v3 Authority Key Identifier:
                keyid:CD:4E:2E:C5:F7:BF:B3:6F:5E:23:C7:FB:A6:3B:52:71:6C:70:3A:90
Certificate is to be certified until Nov 23 04:53:26 2015 GMT (365 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@LVS/DR tmp]# scp apache.crt root@192.168.1.130:/etc/httpd/conf/ssl
apache.crt                                100% 3047     3.0KB/s   00:00  
4 配置Apache的https服务
/etc/httpd/conf.d/ssl.conf    配置如下几个选项
DocumentRoot "/var/www/html"
SSLCertificateFile /etc/httpd/conf/ssl/apache.crt
SSLCertificateKeyFile /etc/httpd/conf/ssl/apache.key
5 copy node3的ssl配置到node2并重启httpd服务
[root@node3 httpd]# scp conf.d/ssl.conf root@192.168.1.120:/etc/httpd/conf.d
[root@node3 httpd]# scp -rp conf/ssl/ root@192.168.1.120:/etc/httpd/conf/ssl/　　验证https服务是否配置成功

　　7）配置iptables和ipvsadm
mangle表
[root@LVS/DR ~]# iptables -t mangle -A PREROUTING -d 192.168.1.250 -p tcp --dport 80 -j MARK --set-mark 80
[root@LVS/DR ~]# iptables -t mangle -A PREROUTING -d 192.168.1.250 -p tcp --dport 443 -j MARK --set-mark 80
定义群集
root@LVS/DR ~]# ipvsadm -A -f 80 -s rr -p
[root@LVS/DR ~]# ipvsadm -a -f 80 -r 192.168.1.130 -g
[root@LVS/DR ~]# ipvsadm -a -f 80 -r 192.168.1.120 -g
[root@LVS/DR ~]# ipvsadm -Ln
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
FWM  80 rr persistent 360
  -> 192.168.1.120:0              Route   1      0          0         
  -> 192.168.1.130:0              Route   1      0          0