[ARTFUL pacemaker - note ]

pacemaker package doesn't build (doesn't build as is without any
changes) in Artful. I suspect the package has been first build in Zesty
and then simply copied to Artful when the release was first created
(without going through the build farm again). Additionally, no change
has been made in Artful since the suspected Zesty->Artful copy so no one
could have notice the FTBFS situation before today.

IMHO, the above is the most plausible reason explaining why we have a
binary package for Artful even though it fails to build in Artful.


# buildlog : 
https://launchpadlibrarian.net/357638704/buildlog_ubuntu-artful-amd64.pacemaker_1.1.16-1ubuntu1_BUILDING.txt.gz
...
crm_mon.c: In function ‘print_nvpair’:
crm_mon.c:959:30: error: comparison between pointer and zero character constant 
[-Werror=pointer-compare]
         for (c = date_str; c != '\0'; ++c) {
                              ^~
crm_mon.c:959:28: note: did you mean to dereference the pointer?
         for (c = date_str; c != '\0'; ++c) {
...                         ^
cc1: all warnings being treated as errors
Makefile:1028: recipe for target 'crm_mon.o' failed
make[3]: *** [crm_mon.o] Error 1
make[3]: *** Waiting for unfinished jobs...
...
dh_auto_build: make -j4 returned exit code 2
debian/rules:31: recipe for target 'override_dh_auto_build-indep' failed
make[1]: *** [override_dh_auto_build-indep] Error 2
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
debian/rules:15: recipe for target 'build' failed
make: *** [build] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2

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https://bugs.launchpad.net/bugs/1740892

Title:
  corosync upgrade on 2018-01-02 caused pacemaker to fail

Status in OpenStack hacluster charm:
  Invalid
Status in corosync package in Ubuntu:
  Fix Released
Status in pacemaker package in Ubuntu:
  Fix Released
Status in corosync source package in Trusty:
  Won't Fix
Status in pacemaker source package in Trusty:
  Won't Fix
Status in corosync source package in Xenial:
  In Progress
Status in pacemaker source package in Xenial:
  In Progress
Status in corosync source package in Artful:
  In Progress
Status in pacemaker source package in Artful:
  In Progress
Status in corosync source package in Bionic:
  Fix Released
Status in corosync package in Debian:
  New

Bug description:
  [Impact]

  When corosync and pacemaker are both installed, a corosync upgrade
  caused pacemaker to fail. pacemaker will need to be restarted manually
  to work again, it won't recover by itself.

  [Test Case]

  1) Have corosync (< 2.3.5-3ubuntu2) and pacemaker (< 1.1.14-2ubuntu1.3) 
installed
  2) Make sure corosync & pacemaker are running via systemctl status cmd.
  3) Upgrade corosync
  4) Look corosync and pacemaker via systemctl status cmd again.

  You will notice pacemaker is dead (inactive) and doesn't recover,
  unless a systemctl start pacemaker is done manually.

  [Regression Potential]

  Regression potential is low, it doesn't change corosync/pacemaker core
  functionality. This patch make sure thing goes smoother at the
  packaging level during a corosync upgrade where pacemaker is
  installed/involved.

  This can also be useful in particular in situation where the system
  has "unattended-upgrades" enable (software upgrades without
  supervision), and no sysadmin available to start pacemaker manually
  because this isn't a schedule maintenance.

  [Other Info]

  XENIAL Merge-proposal:
  
https://code.launchpad.net/~nacc/ubuntu/+source/corosync/+git/corosync/+merge/336338
  
https://code.launchpad.net/~nacc/ubuntu/+source/pacemaker/+git/pacemaker/+merge/336339

  [Original Description]

  During upgrades on 2018-01-02, corosync and it's libs were upgraded:

  (from a trusty/mitaka cloud)

  Upgrade: libcmap4:amd64 (2.3.3-1ubuntu3, 2.3.3-1ubuntu4),
  corosync:amd64 (2.3.3-1ubuntu3, 2.3.3-1ubuntu4), libcfg6:amd64
  (2.3.3-1ubuntu3, 2.3.3-1ubuntu4), libcpg4:amd64 (2.3.3-1ubuntu3,
  2.3.3-1ubuntu4), libquorum5:amd64 (2.3.3-1ubuntu3, 2.3.3-1ubuntu4),
  libcorosync-common4:amd64 (2.3.3-1ubuntu3, 2.3.3-1ubuntu4),
  libsam4:amd64 (2.3.3-1ubuntu3, 2.3.3-1ubuntu4), libvotequorum6:amd64
  (2.3.3-1ubuntu3, 2.3.3-1ubuntu4), libtotem-pg5:amd64 (2.3.3-1ubuntu3,
  2.3.3-1ubuntu4)

  During this process, it appears that pacemaker service is restarted
  and it errors:

  syslog:Jan  2 16:09:33 juju-machine-0-lxc-4 pacemakerd[1994]:   notice: 
crm_update_peer_state: pcmk_quorum_notification: Node 
juju-machine-1-lxc-3[1001] - state is now lost (was member)
  syslog:Jan  2 16:09:34 juju-machine-0-lxc-4 pacemakerd[1994]:   notice: 
crm_update_peer_state: pcmk_quorum_notification: Node 
juju-machine-1-lxc-3[1001] - state is now member (was lost)
  syslog:Jan  2 16:14:32 juju-machine-0-lxc-4 pacemakerd[1994]:    error: 
cfg_connection_destroy: Connection destroyed
  syslog:Jan  2 16:14:32 juju-machine-0-lxc-4 pacemakerd[1994]:   notice: 
pcmk_shutdown_worker: Shuting down Pacemaker
  syslog:Jan  2 16:14:32 juju-machine-0-lxc-4 pacemakerd[1994]:   notice: 
stop_child: Stopping crmd: Sent -15 to process 2050
  syslog:Jan  2 16:14:32 juju-machine-0-lxc-4 pacemakerd[1994]:    error: 
pcmk_cpg_dispatch: Connection to the CPG API failed: Library error (2)
  syslog:Jan  2 16:14:32 juju-machine-0-lxc-4 pacemakerd[1994]:    error: 
mcp_cpg_destroy: Connection destroyed

  Also affected xenial/ocata

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