What is the correct way to disable preempt for keepalived in RHEL 7.3?
Hello.
I am using keepalived 1.2.13 downloaded from RHEL repository and would like to know the correct way to disable preemption when master node comes online after FAULT state.
My environment is
Node 1
IP : 192.168.11.14
Node 2
IP : 192.168.11.14
VIP is 192.168.11.250
Looks like there are couple of ways to implement this.
-
(Without nopreempt) Set state to EQUAL and set same priority on both instances. Ref
-
Use nopreempt option
# VRRP will normally preempt a lower priority
# machine when a higher priority machine comes
# online. "nopreempt" allows the lower priority
# machine to maintain the master role, even when
# a higher priority machine comes back online.
# NOTE: For this to work, the initial state of this
# entry must be BACKUP.
nopreempt
However, in scenario2 vip is not switching into second node although first node goes fault state . States are tracked by track_script in my case.
Below is my configuration
Node 1
global_defs {
notification_email {
root@localhost.localdomain
}
notification_email_from root@localhost.localdomain
}
vrrp_script check_service {
script "/usr/bin/netstat -atunp | grep '0.0.0.0:514' &>/dev/null"
interval 2 # every 2 seconds
weight 2 # add 2 points if OK
}
vrrp_instance RSYSLOG_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 10
advert_int 1
nopreempt
virtual_ipaddress {
192.168.11.250/24
}
track_script {
check_service
}
}
Node2
global_defs {
notification_email {
root@localhost.localdomain
}
notification_email_from root@localhost.localdomain
}
vrrp_script check_service {
script "/usr/bin/netstat -atunp | grep '0.0.0.0:514' &>/dev/null"
interval 2 # every 2 seconds
weight 2 # add 2 points if OK
}
vrrp_instance RSYSLOG_1 {
state BACKUP
interface eth0
virtual_router_id 51
priority 9
advert_int 1
nopreempt
virtual_ipaddress {
192.168.11.250/24
}
track_script {
check_service
}
}
Does anybody know the proper way to prevent the preemption? Any advice is appreciated!
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