monit disregards start delay period in LXC container

[Oliver Mueller]

Monit has a start delay timer, to prevent service from starting other services too early (before they are ready). This bug has been reported to monit developer and is fixed with commit https://bitbucket.org/tildeslash/monit/commits/2dae91df32ac7bd0e02c6e6ee8522e75958f4324.

Main problem here is, that boot time is read from /proc/stat
# grep btime /proc/stat

This boot time is from host though and a wrong reference in this case. It differs from /proc/uptime.

It is probably a major bug, because it can disrupt boot order. If monit starts pretty early and detects other services are not running, it will immediately (re-)start them. In case of apps with databases, this could lead to problems.

# lsb_release -rd
Description: Ubuntu 20.04.1 LTS
Release: 20.04

# apt-cache policy monit
monit:
  Installed: 1:5.26.0-4
  Candidate: 1:5.26.0-4
  Version table:
 *** 1:5.26.0-4 500
        500 http://de.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
        100 /var/lib/dpkg/status