Keepalived installation configuration

By using Keepalived, the two servers can achieve active-standby failover. When one of the servers fails, the other server can take over.

Tools/Materials

 

• Centos、Keepalived

method/step

 

1.  

   First download Keepalived from the official website, and then log in to the Centos system to install the necessary environment: gcc, openssl, pcre.

2.  

   Copy the downloaded package to the Centos root directory.

   Unzip the package, compile and install:

   tar zxvf keepalived-1.2.18.tar.gz

   cd keepalived-1.2.18

   ./configure

   make

   make install

   
3.  

   Configuration file after installation: /usr/local/eth/keepalived/keepalived.conf

   master node:

   
4.  

   Standby node:

   
5.  

   Modify the configuration to allow binding unknown IPs:

   /etc/sysctl.conf net.ipv4.ip_nonlocal_bind = 1

   sysctl -p

    

   Finally copy the configuration file to the corresponding directory:

   cp /usr/local/sbin/keepalived               /usr/sbin/ 

   cp /usr/local/etc/rc.d/init.d/keepalived /etc/init.d/  

   cp /usr/local/etc/sysconfig/keepalived /etc/sysconfig/  

   cp -r /usr/local/etc/keepalived/            /etc/

    

   Restart the service:

   service keepalived restart

    

   Check the binding status:

   
6. 6

   In the test, use the machine to ping the virtual address for a long time, and perform the switching test: when the main keepalived is turned off, the backup opportunity will take over, and a packet may be lost at this time.

   

7.