Version pre 2.x of keepalive which are shipped with the Ubuntu18 Repository will crash. You’ll have to configure a higher Version from source by yourself.
https://github.com/acassen/keepalived/issues/836
https://www.keepalived.org/download.html
“/lib/systemd/system/keepalived.service”
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[Unit]
Description=LVS and VRRP High Availability Monitor
After=network-online.target syslog.target
Wants=network-online.target
[Service]
Type=forking
PIDFile=/run/keepalived.pid
KillMode=process
EnvironmentFile=-/usr/local/etc/sysconfig/keepalived
ExecStart=/usr/local/sbin/keepalived $KEEPALIVED_OPTIONS
ExecReload=/bin/kill -HUP $MAINPID
[Install]
WantedBy=multi-user.target