system-config/doc/puppet.rst

Puppet Master

Overview

Instead of using a cron job, StackForge uses a puppet master to host the puppet manifests and modules. The other nodes then connect to this as puppet agents to get their configuration.

Puppet Master

The puppet master is setup using a combination of Apache and mod passenger to ship the data to the clients. To install this:

sudo apt-get install puppet puppetmaster-passenger

Files for puppet master are stored in a git repo clone at /opt/openstack-ci-puppet. In StackForge we have a root cron job that automatically populates these from our puppet git repository as follows:

*/15 * * * * sleep $((RANDOM\%600)) && cd /opt/openstack-ci-puppet && /usr/bin/git pull -q

The /etc/puppet/puppet.conf file then needs updating to point to the manifest and modules as follows:

[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
manifestdir=/opt/openstack-ci-puppet/manifests
modulepath=/opt/openstack-ci-puppet/modules
manifest=$manifestdir/stackforge.pp

Adding a node

On the new server connecting to the puppet master:

sudo apt-get install puppet

Then edit the /etc/default/puppet file to change the start variable:

# Start puppet on boot?
START=yes

The node then needs to be configured to set a fixed hostname and the hostname of the puppet master with the following additions to /etc/puppet/puppet.conf:

[main]
server=puppet.stackforge.org
certname=review.stackforge.org

The cert signing process needs to be started with:

sudo puppet agent --test

This will make a request to the puppet master to have its SSL cert signed. On the puppet master:

sudo puppet cert list

You should get a list of entries similar to the one below:

review.stackforge.org  (44:18:BB:DF:08:50:62:70:17:07:82:1F:D5:70:0E:BF)

If you see the new node there you can sign its cert on the puppet master with:

sudo puppet cert sign review.stackforge.org

Finally on the puppet agent you need to start the agent daemon:

sudo service puppet start

Now that it is signed the puppet agent will execute any instructions for its node on the next run (default is every 30 minutes). You can trigger this earlier by restarting the puppet service on the agent node.

Important Notes

1. Make sure the site manifest does not include the puppet cron job, this conflicts with puppet master and can cause issues. The initial puppet run that create users should be done using the puppet agent configuration above.
2. If you do not see the cert in the master's cert list the agent's /var/log/syslog should have an entry showing you why.