集群基础----（keepalived---高可用+负载均衡）

来源：互联网发布：淘宝图片空间一键删除编辑：程序博客网时间：2024/06/16 14:17

keepalived(高可用+负载均衡)

1.关闭心跳

    chkconfig heartbeat off

2.使虚拟机纯净，删除其他包(在/root)
rm -fr *

3.get keepalived-1.3.5.tar.gz from 老吴

    tar zxf keepalived-1.3.5.tar.gz     cd keepalived-1.3.5如果出现版本错误或者需要重新安装的情况，那么 rm -fr keepalived/、make clean（cd keepalived-1.3.5）

4.编译三步曲（在/root/keepalived-1.3.5/）

    ./configure --prefix=/usr/local/keepalived --with-init=SYSV    make && make install

5.软链接的制作（两台服务都要进行操作）
<<<从主节点发送过去scp -r /usr/local/keepalived/ root@172.25.78.2:/usr/local/>>>

[root@server1 sbin]# ln -s /usr/local/keepalived/sbin/keepalived /sbin/[root@server1 sbin]# echo $PATH(查看软连接是否成功)[root@server1 etc]# ln -s /usr/local/keepalived/etc/keepalived/ /etc/[root@server1 sysconfig]# ln -s /usr/local/keepalived/etc/sysconfig/keepalived  /etc/sysconfig/[root@server1 init.d]# ln -s /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/[root@server1 init.d]# ll /etc/init.d/keepalived lrwxrwxrwx 1 root root 48 Jul 25 17:04 /etc/init.d/keepalived -> /usr/local/keepalived/etc/rc.d/init.d/keepalived[root@server1 init.d]# ll /usr/local/keepalived/etc/rc.d/init.d/keepalived-rw-r--r-- 1 root root 1308 Jul 25 16:57 /usr/local/keepalived/etc/rc.d/init.d/keepalived（此文件一定要有x权限）[root@server1 init.d]# chmod +x keepalived [root@server1 init.d]# pwd/usr/local/keepalived/etc/rc.d/init.d

6.keepalived配置文件的修改

cd /etc/keepalived/
vim keepalived.conf

[root@server1 keepalived]# cat keepalived.conf ! Configuration File for keepalivedglobal_defs {   notification_email {    root@localhost---邮件发送到本地   }   notification_email_from keeplived@server1---主节点server1   smtp_server 127.0.0.1   smtp_connect_timeout 30   router_id LVS_DEVEL   vrrp_skip_check_adv_addr   vrrp_strict   vrrp_garp_interval 0   vrrp_gna_interval 0}vrrp_instance VI_1 {    state MASTER    interface eth0    virtual_router_id 39-----同一LAN下，不能相同    priority 100    advert_int 1    authentication {        auth_type PASS        auth_pass 1111    }    virtual_ipaddress {        172.25.39.100----------Vip    }}virtual_server 172.25.39.100 80 {    delay_loop 6    lb_algo rr    lb_kind DR   # persistence_timeout 50    protocol TCP    real_server 172.25.39.2 80 {        weight 1        TCP_CHECK {            connect_timeout 3            nb_get_retry 3            delay_before_retry 3        }    }    real_server 172.25.39.3 80 {        weight 1        TCP_CHECK {            connect_timeout 3            nb_get_retry 3            delay_before_retry 3        }    }}

7.将相同的文件复制到另一个集群节点上
scp -r keepalived/ server4:/usr/local/

[root@server4 keepalived]# cat keepalived.conf ! Configuration File for keepalivedglobal_defs {   notification_email {    root@localhoat   }   notification_email_from keeplived@server4   smtp_server 127.0.0.1   smtp_connect_timeout 30   router_id LVS_DEVEL   vrrp_skip_check_adv_addr   vrrp_strict   vrrp_garp_interval 0   vrrp_gna_interval 0}vrrp_instance VI_1 {    state BACKUP    interface eth0    virtual_router_id 39    priority 50----两个节点要有差距，主节点大    advert_int 1    authentication {        auth_type PASS        auth_pass 1111    }    virtual_ipaddress {        172.25.39.100    }}virtual_server 172.25.39.100 80 {    delay_loop 6    lb_algo rr    lb_kind DR   # persistence_timeout 50(一定要记得注释，要不就要等50s)    protocol TCP    real_server 172.25.39.2 80 {        weight 1        TCP_CHECK {            connect_timeout 3            nb_get_retry 3            delay_before_retry 3        }    }    real_server 172.25.39.3 80 {        weight 1        TCP_CHECK {            connect_timeout 3            nb_get_retry 3            delay_before_retry 3        }    }}

8.开启服务
/etc/init.d/keepalived start 打开两台服务的keepalived

出现的问题：[root@server2 keepalived]# /etc/init.d/keepalived start补不齐，没有这个服务解决方法：从主节点发送过去scp -r /usr/local/keepalived/  root@172.25.78.2:/usr/local/[root@server2 keepalived]# chmod +x /usr/local/keepalived/etc/rc.d/init.d/keepalived [root@server2 keepalived]# /etc/init.d/keepalived startStarting keepalived:                               [  OK  ][root@server2 keepalived]# pwd/usr/local/keepalived

9.测试

    ip addr    ipvsadm -L    curl 172.25.39.100 注意：：iptables -L         iptables -F（刷掉策略）

[root@server4 keepalived]# ipvsadm -lIP Virtual Server version 1.2.1 (size=4096)Prot LocalAddress:Port Scheduler Flags  -> RemoteAddress:Port           Forward Weight ActiveConn InActConnTCP  172.25.39.100:http rr  -> server2:http                 Route   1      0          0           -> server3:http                 Route   1      0          0         [root@server4 keepalived]# iptables -LChain INPUT (policy ACCEPT)target     prot opt source               destination         Chain FORWARD (policy ACCEPT)target     prot opt source               destination         Chain OUTPUT (policy ACCEPT)target     prot opt source               destination         [root@server4 keepalived]# ip addr1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    inet 127.0.0.1/8 scope host lo    inet6 ::1/128 scope host        valid_lft forever preferred_lft forever2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000    link/ether 52:54:00:54:92:7a brd ff:ff:ff:ff:ff:ff    inet 172.25.39.4/24 brd 172.25.39.255 scope global eth0    inet 172.25.39.100/32 scope global eth0    inet6 fe80::5054:ff:fe54:927a/64 scope link        valid_lft forever preferred_lft forever[root@server4 keepalived]# iptables -LChain INPUT (policy ACCEPT)target     prot opt source               destination         DROP       all  --  anywhere             172.25.39.100       Chain FORWARD (policy ACCEPT)target     prot opt source               destination         Chain OUTPUT (policy ACCEPT)target     prot opt source               destination         [root@server4 keepalived]# ip addr1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    inet 127.0.0.1/8 scope host lo    inet6 ::1/128 scope host        valid_lft forever preferred_lft forever2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000    link/ether 52:54:00:54:92:7a brd ff:ff:ff:ff:ff:ff    inet 172.25.39.4/24 brd 172.25.39.255 scope global eth0    inet 172.25.39.100/32 scope global eth0    inet6 fe80::5054:ff:fe54:927a/64 scope link        valid_lft forever preferred_lft forever[root@server4 keepalived]# iptables -LChain INPUT (policy ACCEPT)target     prot opt source               destination         Chain FORWARD (policy ACCEPT)target     prot opt source               destination         Chain OUTPUT (policy ACCEPT)target     prot opt source               destination         [root@server4 keepalived]# ip addr1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    inet 127.0.0.1/8 scope host lo    inet6 ::1/128 scope host        valid_lft forever preferred_lft forever2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000    link/ether 52:54:00:54:92:7a brd ff:ff:ff:ff:ff:ff    inet 172.25.39.4/24 brd 172.25.39.255 scope global eth0    inet6 fe80::5054:ff:fe54:927a/64 scope link        valid_lft forever preferred_lft forever

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