Linux|【Linux】centos下进行keepalived安装部署负载均衡|运维|实施工程师

配置环境：centos7.9

[root@yyq ~]#cat /etc/redhat-release CentOS Linux release 7.9.2009 (Core)

配置步骤 1.安装keepalived模块

yum install -y keepalived

日志：

[root@yyq ~]#yum install -y keepalived Loaded plugins: fastestmirror, priorities, versionlock Loading mirror speeds from cached hostfile name| 3.6 kB00:00:00 Resolving Dependencies --> Running transaction check ---> Package keepalived.x86_64 0:1.3.5-19.el7 will be installed --> Processing Dependency: libnetsnmpmibs.so.31()(64bit) for package: keepalived-1.3.5-19.el7.x86_64 --> Processing Dependency: libnetsnmpagent.so.31()(64bit) for package: keepalived-1.3.5-19.el7.x86_64 --> Running transaction check ---> Package net-snmp-agent-libs.x86_64 1:5.7.2-49.el7 will be installed --> Finished Dependency ResolutionDependencies Resolved===================================================================================================================== PackageArchVersionRepositorySize ===================================================================================================================== Installing: keepalivedx86_641.3.5-19.el7name332 k Installing for dependencies: net-snmp-agent-libsx86_641:5.7.2-49.el7name708 kTransaction Summary ===================================================================================================================== Install1 Package (+1 Dependent package)Total download size: 1.0 M Installed size: 3.0 M Downloading packages: (1/2): keepalived-1.3.5-19.el7.x86_64.rpm| 332 kB00:00:00 (2/2): net-snmp-agent-libs-5.7.2-49.el7.x86_64.rpm| 708 kB00:00:00 --------------------------------------------------------------------------------------------------------------------- Total1.1 MB/s | 1.0 MB00:00:00 Running transaction check Running transaction test Transaction test succeeded Running transaction Installing : 1:net-snmp-agent-libs-5.7.2-49.el7.x86_641/2 Installing : keepalived-1.3.5-19.el7.x86_642/2 Verifying: 1:net-snmp-agent-libs-5.7.2-49.el7.x86_641/2 Verifying: keepalived-1.3.5-19.el7.x86_642/2 Installed: keepalived.x86_64 0:1.3.5-19.el7Dependency Installed: net-snmp-agent-libs.x86_64 1:5.7.2-49.el7Complete! [root@yyq ~]#

2.配置keepalived
配置keepalived的配置文件keepalived.conf：

vi /etc/keepalived/keepalived.conf

文件内容如下
(其中的interface、priority和virtual_ipaddress按需修改，两台服务器的priority需要不同，priority较大的默认是主服务器):
interface对应网卡名称
查看网卡

[root@yyq ~]#ifconfig eth0: flags=4111mtu 1450 inet 192.168.1.98netmask 255.255.255.0broadcast 192.168.1.255 inet6 1111::f111:1111:1111:1111prefixlen 64scopeid 0x20 ether 11:11:11:11:11:11txqueuelen 1000(Ethernet) RX packets 9122848bytes 6131066305 (5.7 GiB) RX errors 0dropped 0overruns 0frame 0 TX packets 3059946bytes 1479130540 (1.3 GiB) TX errors 0dropped 0 overruns 0carrier 0collisions 0

keepalived.conf配置

[root@yyq ~]#vi /etc/keepalived/keepalived.conf ! Configuration File for keepalivedvrrp_instance VI_1 { state BACKUP interface eth0 virtual_router_id 94 priority 110 advert_int 1 authentication { auth_type PASS auth_pass 1234 } virtual_ipaddress { 192.168.1.101 } }~

3.启动keepalived
在服务器上执行：

systemctl start keepalived systemctl enable keepalived

日志

[root@yyq ~]#systemctl start keepalived [root@yyq ~]#systemctl enable keepalived Created symlink from /etc/systemd/system/multi-user.target.wants/keepalived.service to /usr/lib/systemd/system/keepalived.service. [root@yyq ~]#

4.检查虚拟IP是否正常
在任意一台服务器上执行：

ssh <虚拟IP地址>

如果可以成功登陆priority较大的那台服务器，则表示配置成功。
日志：

[root@yyq /etc/keepalived]#ssh 192.168.1.101 The authenticity of host '192.168.1.101 (192.168.1.101)' can't be established. ED25519 key fingerprint is SHA256:V1111111111111111. This host key is known by the following other names/addresses: ~/.ssh/known_hosts:1: 192.168.1.197 ~/.ssh/known_hosts:4: 192.168.1.210 ~/.ssh/known_hosts:5: 192.168.1.196 ~/.ssh/known_hosts:6: 192.168.1.203 ~/.ssh/known_hosts:7: 192.168.1.211 ~/.ssh/known_hosts:11: 192.168.1.208 ~/.ssh/known_hosts:12: 192.168.1.215 ~/.ssh/known_hosts:13: 192.168.1.204 (2 additional names omitted) Are you sure you want to continue connecting (yes/no/[fingerprint])? yes Warning: Permanently added '192.168.1.101' (ED25519) to the list of known hosts. Authorized only. All activity will be monitored and reported root@192.168.1.101's password: Last login: Mon Mar 21 11:01:15 2022 from 192.168.1.236 Authorized users only. All activity may be monitored and reported [root@yyq ~]#ifconfig eth0: flags=4111mtu 1450 inet 192.168.1.98netmask 255.255.255.0broadcast 192.168.1.255 inet6 1111::f111:1111:1111:1111prefixlen 64scopeid 0x20 ether 11:11:11:11:11:11txqueuelen 1000(Ethernet) RX packets 9122848bytes 6131066305 (5.7 GiB) RX errors 0dropped 0overruns 0frame 0 TX packets 3059946bytes 1479130540 (1.3 GiB) TX errors 0dropped 0 overruns 0carrier 0collisions 0

【Linux|【Linux】centos下进行keepalived安装部署】参考：
内部部署文档