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

[Launchpad Bug Tracker]

This bug was fixed in the package open-iscsi - 2.0.874-5ubuntu4

---------------
open-iscsi (2.0.874-5ubuntu4) cosmic; urgency=medium

  * debian/tests/install: ignore the potential stderr of the probing command
    that is meant to activate iscsid indirectly via the socket.

open-iscsi (2.0.874-5ubuntu3) cosmic; urgency=medium

  * make iscsid socket activated to only activate it as-needed (LP: #1755858)
    - debian/iscsid.socket: systemd socket file for iscsid
    - debian/open-iscsi.service: do not start or check iscsid.service
    - debian/rules: install and enable iscsid.socket
    - debian/patches/iscid-conf-use-systemd.socket-patch: default to the socket
    - debian/open-iscsi.postinst:
      + run restart logic only if service is running on upgrade
      + drop no more reachable upgrade path that affects iscsid
      + disable iscsid.service on upgrade
      + handle iscsid.socket to be started if the service is not running yet
    - debian/tests/install: fix tests to work with socket activation

 -- Christian Ehrhardt <christian.ehrhardt at canonical.com>  Wed, 30 May
2018 15:42:12 +0200

** Changed in: open-iscsi (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1755858

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:
  Triaged
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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