Foreman Maintain

It seems the disable command removes foreman-tasks

More info and reproducer:

On katello 3.6: dynflowd, foreman-tasks all exist and show up in the service list with restart

[root@centos7-katello-3-6 foreman_maintain]# ./bin/foreman-maintain service restart
Running Restart Services
================================================================================
Check if command is run as root user:                                 [OK]
--------------------------------------------------------------------------------
Restart applicable services: 
Stopping the following service(s):

postgresql, mongod, qdrouterd, squid, qpidd, pulp_resource_manager, pulp_streamer, pulp_celerybeat, pulp_workers, foreman-proxy, tomcat, foreman-tasks, httpd, puppetserver

\ stopping httpd^C                                                      [RUNNING]
--------------------------------------------------------------------------------
[root@centos7-katello-3-6 foreman_maintain]# which dynflowd
/sbin/dynflowd
[root@centos7-katello-3-6 foreman_maintain]# systemctl status foreman-tasks
● dynflowd.service - Foreman jobs daemon
   Loaded: loaded (/usr/lib/systemd/system/dynflowd.service; enabled; vendor preset: disabled)
   Active: active (running) since Fri 2018-04-27 20:54:15 UTC; 57s ago
     Docs: https://theforeman.org
  Process: 3602 ExecStop=/usr/sbin/dynflowd stop (code=exited, status=0/SUCCESS)
  Process: 4203 ExecStart=/usr/sbin/dynflowd start (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/dynflowd.service
           ├─4239 dynflow_executor
           └─4245 dynflow_executor_monitor

Apr 27 20:54:14 centos7-katello-3-6.jomitsch.example.com dynflowd[4203]: /usr/share/foreman/lib/foreman.rb:8: warning: already initialized constant Foreman::UUID_REGEXP
Apr 27 20:54:14 centos7-katello-3-6.jomitsch.example.com dynflowd[4203]: /usr/share/foreman/lib/foreman.rb:8: warning: previous definition of UUID_REGEXP was here
Apr 27 20:54:14 centos7-katello-3-6.jomitsch.example.com dynflowd[4203]: /usr/share/foreman/lib/core_extensions.rb:183: warning: already initialized constant ActiveSupport::Messag...LT_CIPHER
Apr 27 20:54:14 centos7-katello-3-6.jomitsch.example.com dynflowd[4203]: /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/message_encrypto... was here
Apr 27 20:54:14 centos7-katello-3-6.jomitsch.example.com dynflowd[4203]: /opt/theforeman/tfm/root/usr/share/gems/gems/logging-1.8.2/lib/logging/appender.rb:139: warning: constant ...eprecated
Apr 27 20:54:14 centos7-katello-3-6.jomitsch.example.com dynflowd[4203]: Dynflow Executor: start in progress
Apr 27 20:54:14 centos7-katello-3-6.jomitsch.example.com dynflowd[4203]: /opt/theforeman/tfm/root/usr/share/gems/gems/daemons-1.2.3/lib/daemons/daemonize.rb:75: warning: conflicti...dir block
Apr 27 20:54:14 centos7-katello-3-6.jomitsch.example.com dynflowd[4203]: /opt/theforeman/tfm/root/usr/share/gems/gems/daemons-1.2.3/lib/daemons/daemonize.rb:108: warning: conflict...dir block
Apr 27 20:54:15 centos7-katello-3-6.jomitsch.example.com dynflowd[4203]: dynflow_executor: process with pid 4239 started.
Apr 27 20:54:15 centos7-katello-3-6.jomitsch.example.com systemd[1]: Started Foreman jobs daemon.
Hint: Some lines were ellipsized, use -l to show in full.

When running 'foreman-maintain service disable', foreman-tasks disappears, notice it is not in the list the second time.

[root@centos7-katello-3-6 foreman_maintain]# ./bin/foreman-maintain service disable
Running Disable Services
================================================================================
Check if command is run as root user:                                 [OK]
--------------------------------------------------------------------------------
Disable applicable services: 
Disabling the following service(s):

postgresql, mongod, qdrouterd, squid, qpidd, pulp_resource_manager, pulp_streamer, pulp_celerybeat, pulp_workers, foreman-proxy, tomcat, foreman-tasks, httpd, puppetserver

/ All services disabled                                               [OK]      
--------------------------------------------------------------------------------

[root@centos7-katello-3-6 foreman_maintain]# ./bin/foreman-maintain service disable
Running Disable Services
================================================================================
Check if command is run as root user:                                 [OK]
--------------------------------------------------------------------------------
Disable applicable services: 
Disabling the following service(s):

postgresql, mongod, qdrouterd, squid, qpidd, pulp_resource_manager, pulp_streamer, pulp_celerybeat, pulp_workers, foreman-proxy, tomcat, httpd, puppetserver

| All services disabled                                               [OK]      
--------------------------------------------------------------------------------

foreman-tasks is no longer present

[root@centos7-katello-3-6 foreman_maintain]# systemctl status foreman-tasks
Unit foreman-tasks.service could not be found.

It looks like this actually isn't related to foreman-maintain and foreman-tasks can't be reenabled or found after being disabled?

[root@centos7-katello-3-6 ~]# systemctl status foreman-tasks
● dynflowd.service - Foreman jobs daemon
   Loaded: loaded (/usr/lib/systemd/system/dynflowd.service; enabled; vendor preset: disabled)
   Active: active (running) since Fri 2018-04-27 21:04:52 UTC; 53s ago
     Docs: https://theforeman.org
  Process: 832 ExecStart=/usr/sbin/dynflowd start (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/dynflowd.service
           ├─1958 dynflow_executor
           └─1961 dynflow_executor_monitor

Apr 27 21:04:50 centos7-katello-3-6.jomitsch.example.com dynflowd[832]: /usr/share/foreman/lib/foreman.rb:8: warning: already initialized constant Foreman::UUID_REGEXP
Apr 27 21:04:50 centos7-katello-3-6.jomitsch.example.com dynflowd[832]: /usr/share/foreman/lib/foreman.rb:8: warning: previous definition of UUID_REGEXP was here
Apr 27 21:04:50 centos7-katello-3-6.jomitsch.example.com dynflowd[832]: /usr/share/foreman/lib/core_extensions.rb:183: warning: already initialized constant ActiveSupport::Message...LT_CIPHER
Apr 27 21:04:50 centos7-katello-3-6.jomitsch.example.com dynflowd[832]: /opt/theforeman/tfm-ror51/root/usr/share/gems/gems/activesupport-5.1.4/lib/active_support/message_encryptor... was here
Apr 27 21:04:50 centos7-katello-3-6.jomitsch.example.com dynflowd[832]: /opt/theforeman/tfm/root/usr/share/gems/gems/logging-1.8.2/lib/logging/appender.rb:139: warning: constant :...eprecated
Apr 27 21:04:50 centos7-katello-3-6.jomitsch.example.com dynflowd[832]: Dynflow Executor: start in progress
Apr 27 21:04:51 centos7-katello-3-6.jomitsch.example.com dynflowd[832]: /opt/theforeman/tfm/root/usr/share/gems/gems/daemons-1.2.3/lib/daemons/daemonize.rb:75: warning: conflictin...dir block
Apr 27 21:04:51 centos7-katello-3-6.jomitsch.example.com dynflowd[832]: /opt/theforeman/tfm/root/usr/share/gems/gems/daemons-1.2.3/lib/daemons/daemonize.rb:108: warning: conflicti...dir block
Apr 27 21:04:51 centos7-katello-3-6.jomitsch.example.com dynflowd[832]: dynflow_executor: process with pid 1958 started.
Apr 27 21:04:52 centos7-katello-3-6.jomitsch.example.com systemd[1]: Started Foreman jobs daemon.
Hint: Some lines were ellipsized, use -l to show in full.

[root@centos7-katello-3-6 ~]# systemctl disable foreman-tasks
Removed symlink /etc/systemd/system/multi-user.target.wants/dynflowd.service.
Removed symlink /etc/systemd/system/foreman-tasks.service.

[root@centos7-katello-3-6 ~]# systemctl status foreman-tasks
Unit foreman-tasks.service could not be found.

[root@centos7-katello-3-6 ~]# systemctl enable foreman-tasks
Failed to execute operation: No such file or directory

It seems it's due to fact that `foreman-tasks` is just an alias here, for compatibility reasons. In Foreman 1.18+, `dynflowd` name should be used instead.

Looks like changing to dynflowd works, however we will have to handle the different versions of katello/satellite using different service names. From an irc convo

aruzicka_ jomitsch: if I'm reading this right it (dynflowd) wasn't added through foreman-tasks 
but it was added in foreman 1.17rc1