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https://bugs.launchpad.net/bugs/1755061

Title:
  HAProxyContext on Ubuntu 14.04 generates config that fails to start on
  boot

Status in haproxy package in Ubuntu:
  Fix Released
Status in haproxy source package in Trusty:
  Fix Committed

Bug description:
  [Impact]
  Valid haproxy configuration directives don't work on trusty as /run/haproxy 
does not survive reboots and is not-recreated on daemon start.

  [Test Case]
  sudo apt install haproxy
  configure /etc/haproxy.cfg with a admin socket in /run/haproxy:

  global
      log /var/lib/haproxy/dev/log local0
      log /var/lib/haproxy/dev/log local1 notice
      maxconn 20000
      user haproxy
      group haproxy
      spread-checks 0
      stats socket /var/run/haproxy/admin.sock mode 600 level admin
      stats timeout 2m

  Restart haproxy (will fail as /{,var/}run/haproxy does not exist)

  [Regression Potential]
  Minimal - same fix is in later package revisions

  [Original Bug Report]
  While testing upgrades of an Ubuntu 14.04 deployment of OpenStack from ~15.04 
to 17.11 charms, I noticed that a number of the OpenStack charmed services 
failed to start haproxy when I rebooted their units: cinder, glance, keystone, 
neutron-api, nova-cloud-controller, and swift-proxy.

  The following was in /var/log/boot.log:

  [ALERT] 069/225906 (1100) : cannot bind socket for UNIX listener 
(/var/run/haproxy/admin.sock). Aborting.
  [ALERT] 069/225906 (1100) : [/usr/sbin/haproxy.main()] Some protocols failed 
to start their listeners! Exiting.
   * Starting haproxy haproxy                                              
[fail]

  The charm created /var/run/haproxy, but since /var/run (really /run)
  is a tmpfs, this did not survive the reboot and so haproxy could not
  create the socket.

  I compared the haproxy.cfg the charm creates with the default config
  shipped by the Ubuntu 16.04 haproxy package, and it seems that
  charmhelpers/contrib/openstack/templates/haproxy.cfg is closely based
  on the package, including the admin.sock directive.  However, on
  Ubuntu 16.04, /etc/init.d/haproxy ensures that /var/run/haproxy exists
  before it starts haproxy:

  [agnew(work)] diff -u haproxy-1.4.24/debian/haproxy.init 
haproxy-1.6.3/debian/haproxy.init
  --- haproxy-1.4.24/debian/haproxy.init  2015-12-16 03:55:29.000000000 +1300
  +++ haproxy-1.6.3/debian/haproxy.init   2015-12-31 20:10:38.000000000 +1300
  [...]
  @@ -50,6 +41,10 @@

   haproxy_start()
   {
  +       [ -d "$RUNDIR" ] || mkdir "$RUNDIR"
  +       chown haproxy:haproxy "$RUNDIR"
  +       chmod 2775 "$RUNDIR"
  +
          check_haproxy_config

          start-stop-daemon --quiet --oknodo --start --pidfile "$PIDFILE" \
  [...]

  charm-helpers or the OpenStack charms or both should be updated so
  that haproxy will start on boot when running on Ubuntu 14.04.

To manage notifications about this bug go to:
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