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[Scott Kitterman <ubuntu@xxxxxxxxxxxxx>]

I can't replicate this on an older release with upstart instead of
systemd.

service opendkim start
Starting OpenDKIM: opendkim: /etc/opendkim.conf: ldap://192.0.2.1/ou=people,dc=example,dc=com?DKIMSelector?sub?(DKIMIdentity=$d): dkimf_db_open(): Can't contact LDAP server
opendkim.
# ps -AF|grep opendkim
opendkim   677     1  0 63960  1648   0 Apr30 ?        00:00:01 rsyslogd
root      3012 12880  0  2216   648   1 00:11 pts/4    00:00:00 grep opendkim
# service opendkim status
 * opendkim is not running

I suspect this is a systemd issue.

As a workaround, you might add SoftStart true to your opendkim.conf.
That should cause it to start normally without LDAP.

** Package changed: opendkim (Ubuntu) => systemd (Ubuntu)

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https://bugs.launchpad.net/bugs/1452538

Title:
  opendkim does not start properly when ldap server can't be contacted

Status in systemd package in Ubuntu:
  New

Bug description:
  when starting opendkim, if ldap is in use and the server cannot be
  contacted, opendkim gets stuck in a state where the system appears to
  think it has started, but is not actually running:

  >systemctl -l status opendkim
  ● opendkim.service - LSB: Start the OpenDKIM service
     Loaded: loaded (/etc/init.d/opendkim)
     Active: active (exited) since Wed 2015-05-06 23:16:20 EDT; 1min 24s ago
       Docs: man:systemd-sysv-generator(8)
    Process: 589 ExecStart=/etc/init.d/opendkim start (code=exited, status=0/SUCCESS)

  May 06 23:16:19 server systemd[1]: Starting LSB: Start the OpenDKIM service...
  May 06 23:16:20 server opendkim[589]: Starting OpenDKIM: opendkim: /etc/opendkim/opendkim.conf: ldap://dsa.example.com/ou=domains,ou=mail,dc=example,dc=com?host?sub?(host=$d): dkimf_db_open(): Can't contact LDAP server
  May 06 23:16:20 server opendkim[589]: opendkim.
  May 06 23:16:20 server systemd[1]: Started LSB: Start the OpenDKIM service.

  >ps -aefwww | grep -iF dkim
  root       858   815  0 23:18 pts/0    00:00:00 grep -iF dkim

  additional attempts to start opendkim don't indicate failure, but also
  don't work:

  >systemctl start opendkim
  >

  >ps -aefwww | grep -iF dkim
  root       863   815  0 23:19 pts/0    00:00:00 grep -iF dkim

  additionally, as can be seen in the above systemctl status output,
  systemd appears to think that opendkim has started successfully, but
  when testing manually, it does not:

  >/usr/sbin/opendkim -x /etc/opendkim/opendkim.conf -u opendkim -P /var/run/opendkim/opendkim.pid
  opendkim: /etc/opendkim/opendkim.conf: ldap://dsa.example.com/ou=domains,ou=mail,dc=example,dc=com?host?sub?(host=$d): dkimf_db_open(): Can't contact LDAP server

  >echo $?
  78

  lastly, stopping opendkim [even though it's not really running] and
  then starting it again then results in it actually running:

  >systemctl stop opendkim

  >systemctl start opendkim

  >ps -aefwww | grep -iF opendkim
  opendkim  1105     1  0 23:24 ?        00:00:00 /usr/sbin/opendkim -x /etc/opendkim/opendkim.conf -u opendkim -P /var/run/opendkim/opendkim.pid
  opendkim  1106  1105  0 23:24 ?        00:00:00 /usr/sbin/opendkim -x /etc/opendkim/opendkim.conf -u opendkim -P /var/run/opendkim/opendkim.pid
  root      1117   815  0 23:25 pts/0    00:00:00 grep -iF opendkim

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