Prevent master to fall back to master after failure
- by Chrille
I'm using keepalived to setup a virtual ip that points to a master server. When a failover happens it should point the virtual ip to the backup, and the IP should stay there until I manually enable (fix) the master.
The reason this is important is that I'm running mysql replication on the servers and writes should only be on the master. When I failover I promote the slave to master.
The master server:
global_defs {
! this is who emails will go to on alerts
notification_email {
[email protected]
! add a few more email addresses here if you would like
}
notification_email_from [email protected]
! I use the local machine to relay mail
smtp_server 127.0.0.1
smtp_connect_timeout 30
! each load balancer should have a different ID
! this will be used in SMTP alerts, so you should make
! each router easily identifiable
lvs_id APP1
}
vrrp_instance APP1 {
interface eth0
state EQUAL
virtual_router_id 61
priority 999
nopreempt
virtual_ipaddress {
217.x.x.129
}
smtp_alert
}
Backup server:
global_defs {
! this is who emails will go to on alerts
notification_email {
[email protected]
! add a few more email addresses here if you would like
}
notification_email_from [email protected]
! I use the local machine to relay mail
smtp_server 127.0.0.1
smtp_connect_timeout 30
! each load balancer should have a different ID
! this will be used in SMTP alerts, so you should make
! each router easily identifiable
lvs_id APP2
}
vrrp_instance APP2 {
interface eth0
state EQUAL
virtual_router_id 61
priority 100
virtual_ipaddress {
217.xx.xx.129
}
notify_master "/etc/keepalived/notify.sh del app2"
notify_backup "/etc/keepalived/notify.sh add app2"
notify_fault "/etc/keepalived/notify.sh add app2”
smtp_alert
}
