[Bug 1755858] Re: iscsid autostarts on all servers when it has nothing to do

[ Christian Ehrhardt ]

Done for Cosmic.

Steve has mentioned he'd like to see an SRU of this to Bionic, but I think the change carries too much regression potential for an SRU. Please feel free to discuss.
To make it clear I'm not working on Bionic, I'll set Won't Fix for now.

** Changed in: open-iscsi (Ubuntu Bionic)
       Status: Triaged => Won't Fix

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Title:
  iscsid autostarts on all servers when it has nothing to do

Status in open-iscsi package in Ubuntu:
  Fix Released
Status in open-iscsi source package in Bionic:
  Won't Fix
Status in open-iscsi package in Debian:
  New

Bug description:
  In bionic, the open-iscsi systemd unit has the following guards to
  keep it from running on systems with no iscsi targets configured:

  # Must have some pre-defined targets to login to
  ConditionDirectoryNotEmpty=|/etc/iscsi/nodes
  # or have a session to use via iscsid
  ConditionDirectoryNotEmpty=|/sys/class/iscsi_session

  However, iscsid starts from a separate unit and does not include this
  check.  Thus, iscsid starts on every Ubuntu Server install, whether or
  not it has anything to do.

  We should replicate these unit conditionals to the iscsid unit, to
  ensure the daemon doesn't run (consuming memory, and slowing boot)
  when not needed.

  Related bugs:
   * bug 1630946: ubuntu-server depends on open-iscsi and runs iscsid

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