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→Configure keepalived
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valid_lft forever preferred_lft forever | valid_lft forever preferred_lft forever | ||
</pre> | </pre> | ||
To test that the IP is taken over by the standby node, simply stop keepalived and check that the IP is taken over, either via '''ip a s dev ens3'' or via the systemctl status command. | |||
Active system: | |||
<pre> | |||
root@web-srv-1:~# systemctl stop keepalived | |||
root@web-srv-1:~# ip a s dev ens3 | |||
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 | |||
link/ether fa:16:3e:3e:23:46 brd ff:ff:ff:ff:ff:ff | |||
altname enp0s3 | |||
inet 192.168.27.116/24 metric 100 brd 192.168.27.255 scope global dynamic ens3 | |||
valid_lft 82242sec preferred_lft 82242sec | |||
inet6 fe80::f816:3eff:fe3e:2346/64 scope link | |||
valid_lft forever preferred_lft forever | |||
</pre> | |||
Passive system (owns now the VIP): | |||
<pre> | |||
root@web-srv-2:~# ip a s dev ens3 | |||
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 | |||
link/ether fa:16:3e:8f:c6:ed brd ff:ff:ff:ff:ff:ff | |||
altname enp0s3 | |||
inet 192.168.27.127/24 metric 100 brd 192.168.27.255 scope global dynamic ens3 | |||
valid_lft 80346sec preferred_lft 80346sec | |||
inet 192.168.27.251/32 scope global ens3 | |||
valid_lft forever preferred_lft forever | |||
inet6 fe80::f816:3eff:fe8f:c6ed/64 scope link | |||
valid_lft forever preferred_lft forever | |||
</pre> | |||
When you start keepalived again on the first system , it will take the VIP over again, if that is not desired, set the priority to equal numbers. | |||
<pre> | |||
Jun 28 16:05:54 web-srv-2 systemd[1]: Started keepalived.service - Keepalive Daemon (LVS and VRRP). | |||
Jun 28 16:05:54 web-srv-2 Keepalived_vrrp[2238]: (VI_1) Entering BACKUP STATE (init) | |||
Jun 28 16:15:04 web-srv-2 Keepalived_vrrp[2238]: (VI_1) Entering MASTER STATE | |||
Jun 28 16:22:31 web-srv-2 Keepalived_vrrp[2238]: (VI_1) Master received advert from 192.168.27.116 with higher priority 100, ours 50 | |||
Jun 28 16:22:31 web-srv-2 Keepalived_vrrp[2238]: (VI_1) Entering BACKUP STATE | |||
</pre> | |||
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===== Allocate HA Floating IP ===== | ===== Allocate HA Floating IP ===== | ||