Package: keepalived
Version: 1:1.3.2-1
When restart the keepalived systemd loses the MainPID of process.
root@testmaw0:/itmh/scripts# systemctl status keepalived
● keepalived.service - Keepalive Daemon (LVS and VRRP)
Loaded: loaded (/lib/systemd/system/keepalived.service; enabled; vendor
preset: enabled)
Active: active (running) since Tue 2017-04-18 12:33:29 +05; 26s ago
Process: 24042 ExecStart=/usr/sbin/keepalived $DAEMON_ARGS (code=exited,
status=0/SUCCESS)
Main PID: 24043 (keepalived)
Tasks: 2 (limit: 4915)
CGroup: /system.slice/keepalived.service
├─24043 /usr/sbin/keepalived -P -D
└─24044 /usr/sbin/keepalived -P -D
root@testmaw0:/itmh/scripts# systemctl restart keepalived
root@testmaw0:/itmh/scripts# systemctl status keepalived
● keepalived.service - Keepalive Daemon (LVS and VRRP)
Loaded: loaded (/lib/systemd/system/keepalived.service; enabled; vendor
preset: enabled)
Active: active (running) since Tue 2017-04-18 12:34:03 +05; 1s ago
Process: 24124 ExecStart=/usr/sbin/keepalived $DAEMON_ARGS (code=exited,
status=0/SUCCESS)
Main PID: 24043 (code=exited, status=0/SUCCESS)
Tasks: 2 (limit: 4915)
CGroup: /system.slice/keepalived.service
├─24127 /usr/sbin/keepalived -P -D
└─24128 /usr/sbin/keepalived -P -D
After restart keepalived Main PID still 24043, whereas the new pid is 24127.
After that commands like systemctl restart keepalived, systemctl reload
keepalived and systemctl stop keepalived not working.
Solution:
Add to the Systemd Unit keepalived.service option PIDFile= with keepalived
pidfile, like this:
[Unit]
Description=Keepalive Daemon (LVS and VRRP)
After=network-online.target
Wants=network-online.target
# Only start if there is a configuration file
ConditionFileNotEmpty=/etc/keepalived/keepalived.conf
[Service]
Type=forking
KillMode=process
PIDFile=/var/run/keepalived.pid
# Read configuration variable file if it is present
EnvironmentFile=-/etc/default/keepalived
ExecStart=/usr/sbin/keepalived $DAEMON_ARGS
ExecReload=/bin/kill -HUP $MAINPID
[Install]
WantedBy=multi-user.target
After adding this option the keepalived is correctly restarting and systemctl
shows the correct Main PID.
I am using Debian GNU/Linux 9.0, kernel 4.9.0-1-amd64.
