[openstack-dev] [fuel-library] making task "apache" idempotent

Aleksandr Didenko adidenko at mirantis.com
Fri Dec 11 13:45:29 UTC 2015


Hi,

I suppose disabling purge_configs is the only solution here. Running all
the configuration in a single task does not fit well into deployment
granularization philosophy.

Regards,
Alex

On Fri, Dec 11, 2015 at 12:13 PM, Dmitry Bilunov <dbilunov at mirantis.com>
wrote:

> Hello.
>
> I am trying to pick a way of making puppet
> manifest fuel-library/deployment/puppet/osnailyfacter/modular/apache/apache.pp
> idempotent.
> During a normal execution flow, Fuel (fuel-astute, actually) would run
> "apache" task before running other tasks, which create virtual host
> configuration files inside /etc/apache2/sites-enabled/.
> "apache" task currently purges all configuration files, not created by it
> - see https://forge.puppetlabs.com/puppetlabs/apache#purge_configs; it
> seems reasonable to have this option enabled.
>
> However, fuel-astute runs all tasks in a separate "puppet apply"
> processes, which do not know anything about the state of each other. So I
> cannot use the intended (by puppetlabs-apache) way of regenerating the
> configs after the purge.
>
> One way to achieve it is moving the code, generating the configs, into
> apache.pp, so it will be re-run after each purge. However, it is
> complicated by the need of existence of various resources: services' files,
> users and packages. We cannot simply declare any of *::wsgi::apache classes
> inside apache.pp due to these dependencies.
>
> Another way is simply disabling purge_configs and purging manually
> everything that we don't need (like distro's apache mpm config).
>
> Which of these ways looks better? Are there any alternatives that I am
> missing?
> Thanks in advance.
>
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