efe6a22aac
To /opt/config. Change-Id: Iab489ba398522dfd8e36dedb92d4d3f8d78df642 Reviewed-on: https://review.openstack.org/18177 Reviewed-by: Monty Taylor <mordred@inaugust.com> Reviewed-by: Jeremy Stanley <fungi@yuggoth.org> Approved: James E. Blair <corvus@inaugust.com> Reviewed-by: James E. Blair <corvus@inaugust.com> Tested-by: James E. Blair <corvus@inaugust.com>
148 lines
4.2 KiB
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148 lines
4.2 KiB
ReStructuredText
Puppet Master
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=============
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Overview
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--------
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Puppet agent is a mechanism use to pull puppet manifests and configuration
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from a centralized master. This means there is only one place that needs to
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hold secure information such as passwords, and only one location for the git
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repo holding the modules.
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Puppet Master
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-------------
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The puppet master is setup using a combination of Apache and mod passenger to
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ship the data to the clients. To install this:
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.. code-block:: bash
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sudo apt-get install puppet puppetmaster-passenger
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Files for puppet master are stored in a git repo clone at
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``/opt/config``. We have a ``root`` cron job that automatically
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populates these from our puppet git repository as follows:
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.. code-block:: bash
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\*/15 * * * * sleep $((RANDOM\%600)) && cd /opt/config && /usr/bin/git pull -q
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The ``/etc/puppet/puppet.conf`` file then needs updating to point to the
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manifest and modules as follows:
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.. code-block:: ini
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[master]
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# These are needed when the puppetmaster is run by passenger
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# and can safely be removed if webrick is used.
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ssl_client_header = SSL_CLIENT_S_DN
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ssl_client_verify_header = SSL_CLIENT_VERIFY
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manifestdir=/opt/config/manifests
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modulepath=/opt/config/modules
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manifest=$manifestdir/site.pp
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Hiera
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-----
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Hiera is used to maintain secret information on the puppetmaster.
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We want to install hiera from puppetlabs' apt repo, but we don't want to get
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on the puppet upgrade train - so the process is as follows:
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.. code-block:: bash
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echo "deb http://apt.puppetlabs.com precise devel" > /etc/apt/sources.list.d/puppetlabs.list
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apt-get update
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apt-get install hiera hiera-puppet
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rm /etc/apt/sources.list.d/puppetlabs.list
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apt-get update
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Hiera uses a systemwide configuration file in ``/etc/puppet/hiera.yaml``
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which tells is where to find subsequent configuration files.
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.. code-block:: yaml
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---
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:hierarchy:
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- %{operatingsystem}
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- common
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:backends:
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- yaml
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:yaml:
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:datadir: '/etc/puppet/hieradata/%{environment}'
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This setup supports multiple configuration. The two sets of environments
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that OpenStack Infrastructure uses are ``production`` and ``development``.
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``production`` is the default is and the environment used when nothing else
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is specified. Then the configuration needs to be placed into common.yaml in
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``/etc/puppet/hieradata/production`` and ``/etc/puppet/hieradata/development``.
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The values are simple key-value pairs in yaml format.
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Adding a node
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-------------
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On the new server connecting (for example, review.openstack.org) to the puppet master:
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.. code-block:: bash
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sudo apt-get install puppet
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Then edit the ``/etc/default/puppet`` file to change the start variable:
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.. code-block:: ini
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# Start puppet on boot?
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START=yes
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The node then needs to be configured to set a fixed hostname and the hostname
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of the puppet master with the following additions to ``/etc/puppet/puppet.conf``:
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.. code-block:: ini
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[main]
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server=ci-puppetmaster.openstack.org
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certname=review.openstack.org
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The cert signing process needs to be started with:
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.. code-block:: bash
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sudo puppet agent --test
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This will make a request to the puppet master to have its SSL cert signed.
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On the puppet master:
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.. code-block:: bash
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sudo puppet cert list
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You should get a list of entries similar to the one below::
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review.openstack.org (44:18:BB:DF:08:50:62:70:17:07:82:1F:D5:70:0E:BF)
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If you see the new node there you can sign its cert on the puppet master with:
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.. code-block:: bash
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sudo puppet cert sign review.openstack.org
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Finally on the puppet agent you need to start the agent daemon:
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.. code-block:: bash
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sudo service puppet start
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Now that it is signed the puppet agent will execute any instructions for its
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node on the next run (default is every 30 minutes). You can trigger this
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earlier by restarting the puppet service on the agent node.
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Important Notes
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---------------
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#. Make sure the site manifest **does not** include the puppet cron job, this
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conflicts with puppet master and can cause issues. The initial puppet run
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that create users should be done using the puppet agent configuration above.
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#. If you do not see the cert in the master's cert list the agent's
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``/var/log/syslog`` should have an entry showing you why.
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