1. Puppet

As of 2018, HCoop is using Puppet to manage system configuration.

1.1. puppetserver

Puppet git structure (different repos for each): /etc/puppetlabs/puppet, /etc/puppetlabs/code/environments/production (excludes modules), /etc/puppetlabs/code/environments/production/modules/hcoop, /etc/puppetlabs/code/environments/production/modules/hcoop_private. Subject to change.

Git repos structure and tracking of installed modules will be revisited once we need to set up multiple environments. For now, /etc/puppetlabs/code/environments/production/modules/hcoop is where all of our code aside from node definitions lives. /etc/puppetlabs/code/environments/production/modules/hcoop_private is for private data (krb5 host keys, ssl keys, etc.) that needs to be managed by Puppet. Ideally we would use something like wallet for this instead. hcoop_private contains only virtual references to files tagged appropriately so they can be realized on individual servers.

Puppet module structure:

1.1.1. puppetdb

install guide is weird

 puppet resource package puppetdb ensure=latest
 puppet resource package puppetdb-termini ensure=latest
 puppet module install puppetlabs-puppetdb

1.2. Installed Modules

Please Update when installing a new module on the puppetserver.

1.3. Style Guidelines

Ideas for keeping consistency among admins. Work in progress.

2. Config Packages

From 2013 until 2018 we were using config-package-dev to manage the configuration of shared services. They proved to be cumbersome to maintain and were abandoned for Puppet.

The following is for historical reference only.

2.1. Rationale

Using config-package-dev has several advantages for HCoop:

2.1.1. Post-Mortem

However, we failed to realize many of these benefits in the end:

The benefit of automated system installs was realized.

2.2. Current Config Packages

We are managing our configuration packages in git, at /afs/, or you can view the list of configuration packages using gitweb.

2.3. Creating a Config Package

See DebianPackaging#Creating_a_Configuration_Package for the low-level details of creating a config package and our general packaging workflow with git-buildpackage.

The Debathena documentation describes the new primitives. Primarily, config packages will consist of files installed with dh_install, a few diversions, and some transformations. Use what makes sense: dh_installcron et al are your friends. The hcoop-apache2-config package is a good example.

2.4. Services Changed But Unpackaged


ConfigurationManagement (last edited 2018-04-24 02:27:17 by ClintonEbadi)