Leverage SystemD

[JohnMertz]

Local init scripts (/usr/mailcleaner/etc/init.d/) should be a wrapper which includes necessary 'dump' steps, before calling system init script via SystemD for actual process management.

• [x] Convert existing start/stop logic to SystemD units
  • [x] apache
  • [x] clamd
  • [x] clamspamd
  • [ ] ~dccifd~
  • [x] exim_stage1
  • [x] exim_stage2
  • [x] exim_stage4
  • [ ] fail2ban
  • [x] firewall
  • [x] greylistd
  • [x] mailcleaner
  • [x] mailscanner
  • [x] mariadb_master
  • [x] mariadb_slave
  • [x] newsld
  • [x] ntpd
  • [x] preftdaemon
  • [x] snmpd
  • [x] spamd
  • [x] spamhandler
  • [x] spamloggerdaemon
  • [x] spamloggerdaemon
  • [x] statsdaemon
• [x] Migrate 'get_status.pl'

[JohnMertz]

52ba2d8bf89f52208e6419efbc1793ba25f0e3b8 - Introduced alternate support in get_status.pl to use 'service' instead of the commandline name, in which event it will look up the status with systemctl

[JohnMertz]

ccfd449d09f808dbd52c16eb13dbdc3cc530ca22 - Added a generic systemd init script which can be symlinked by any other init script to just run systemctl $0 $@

[JohnMertz]

1cfb8efae3aab8b642d9f08df8e81e9bc8641f74 and others - create scripts/systemd/apache.service.d/override.conf to modify built-in apache service script. Convert etc/init.d/apache to actually call etc/init.d/apache2 (for compatibility), then link the latter to systemd init script.

[JohnMertz]

eb86210910029abf710899557f576001c1639fef and others - convert all exim stages to use systemd. Similar to apache, the old init scripts exist for compatibility, but they each call etc/init.d/exim4@${stage} since that is the built-in name also.

[JohnMertz]

See ce2d987949463fc2fcb74e2796a16f82a4aa6f5a

mailcleaner.target works for start and stop, but not restart (or start too quickly after stop) because it returns from stop before mariadb is down, meaning that it tries to start again but the DB is shutting down. Need to force it to wait until these services stop. Still reading the docs for this.

[JohnMertz]

MariaDB no longer appears to block the restart. However, incomplete service dccifd blocks start because of permission issues and failure to open non-existent files. I need to just remove it as a blocking dependency.

[JohnMertz]

dccifd issue noted in another Issue. fail2ban also has an issue. Continue work in those more specific issues.

[JohnMertz]

Services don't completely start correctly during initial start-up. This is because various services are trying to connect to mariadb@slave too quickly. The After=mariadb@slave.service option does not seem to be sufficient, nor is setting a delay after the slave services with ExecStartPost=sleep 1, since the ExecStartPre=<dumper script> which is trying to connect does not wait on that.

Need to find a proper way of enforcing a delay. Perhaps add a dependency on the mariadb socket instead of service...