title: Puppet clients don't update
body: <p>We are running puppet 2.7.11-1ubuntu2.4 (Ubuntu 12.04) on our clients and master. The clients don't seem to update automatically, but when I run:</p>
  
  <pre><code>sudo puppet agent --test
  </code></pre>
  
  <p>Everything works fine.</p>
  
  <p>Current running processes on the client:</p>
  
  <pre><code>root      1764     1  0 Sep10 ?        00:00:05 /usr/bin/ruby1.8 /usr/bin/puppet agent
  </code></pre>
  
  <p>/etc/puppet/puppet.conf</p>
  
  <pre><code>[main]
    logdir=/var/log/puppet
    vardir=/var/lib/puppet
    ssldir=/var/lib/puppet/ssl
    rundir=/var/run/puppet
    factpath=$vardir/lib/facter
    templatedir=$confdir/templates
    prerun_command=/etc/puppet/etckeeper-commit-pre
    postrun_command=/etc/puppet/etckeeper-commit-post
    pluginsync=true
  
  [master]
    # These are needed when the puppetmaster is run by passenger
    # and can safely be removed if webrick is used.
    ssl_client_header = SSL_CLIENT_S_DN 
    ssl_client_verify_header = SSL_CLIENT_VERIFY
  
  [agent]
    server=&lt;URL_REMOVED&gt;
    configtimeout=300
  </code></pre>
  
  <p>/var/log/syslog.log</p>
  
  <pre><code>Sep 11 16:12:48 &lt;HOSTNAME_REMOVED&gt; puppet-agent[1764]: Did not receive certificate
  Sep 11 16:14:48 &lt;HOSTNAME_REMOVED&gt; puppet-agent[1764]: Did not receive certificate
  Sep 11 16:16:49 &lt;HOSTNAME_REMOVED&gt; puppet-agent[1764]: Did not receive certificate
  Sep 11 16:18:49 &lt;HOSTNAME_REMOVED&gt; puppet-agent[1764]: Did not receive certificate
  Sep 11 16:20:49 &lt;HOSTNAME_REMOVED&gt; puppet-agent[1764]: Did not receive certificate
  </code></pre>
  
  <p>/etc/default/puppet</p>
  
  <pre><code># Defaults for puppet - sourced by /etc/init.d/puppet
  
  # Start puppet on boot?
  START=yes
  
  # Startup options
  DAEMON_OPTS=""
  </code></pre>
  
  <p>Does someone have an idea what could be wrong?</p>