tested on slackware current (oct 2021) and debian12
about keepalived logs: the debian build for keepalive was not compiled with –enable-log-file so the trick for debugging as follows
slackpkg install sysvinit-functions
ls -lF /etc/rc.d/init.d/functions
ls -lF /sbin/consoletype
slackpkg install iptables libnftnl libpcap dbus-1
slackpkg install nftables jansson
sbopkg -i keepalived
cat /etc/default/keepalived # no change required
we need a dedicated user for the check and notify scripts to run
grep ^keepalive /etc/group
grep ^keepalive /etc/passwd
groupadd --system keepalive
useradd --system -s /bin/bash -g keepalive -d /var/tmp --no-create-home keepalive
# -s /sbin/nologin
(seen with the debian build)
-g requires configure option --enable-log-file
==> enable at build time or be happy with syslog
https://slackbuilds.org/repository/15.0/network/keepalived/
https://serverfault.com/questions/1115426/keepalived-with-log-file-doesnt-work ==> enable at build time