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Add replication role detection from runtime Redis information #128

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Add replication role detection from runtime Redis information #128

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Commits on Nov 25, 2016

  1. Add fact scripts to retrieve per-instance information 

    Export Redis information (as retrieved by the INFO) command as local
facts for each configured server/sentinel instance.

Those facts are created in addition to the existing global facts, and
are identified by keys in the form of `redis_{{ redis_port }}` and
`redis_sentinel_{{ redis_sentinel_port }}`.
    @danielkza
    danielkza committed Nov 25, 2016
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  2. Add instance facts tests

    @danielkza
    danielkza committed Nov 25, 2016
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  3. Add option to detect master/slave status from runtime status

    @danielkza
    danielkza committed Nov 25, 2016
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  4. Don't enforce runtime master role if no slaves are connected

    @danielkza
    danielkza committed Nov 25, 2016
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  5. Ensure /etc/redis is created with correct ownership

    @danielkza
    danielkza committed Nov 25, 2016
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  6. Install pre-daemon script to preserve config rewrites 

    The script will copy over the contents of the main configuration file,
then any new lines added to the running config file after the CONFIG
REWRITE tag line. This way Redis Sentinel information and dynamic
master/slave status is not lost when re-configuring instances.
    @danielkza
    danielkza committed Nov 25, 2016
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  7. Run pre-daemon config script (Debian)

    @danielkza
    danielkza committed Nov 25, 2016
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  8. Run pre-daemon config script (RedHat)

    @danielkza
    danielkza committed Nov 25, 2016
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  9. Run pre-daemon config script (generic)

    @danielkza
    danielkza committed Nov 25, 2016
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  10. Run pre-daemon config script (systemd)

    @danielkza
    danielkza committed Nov 25, 2016
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  11. Don't daemonize by default when systemd is used

    @danielkza
    danielkza committed Nov 25, 2016
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  12. Fix role detection when instance facts are not loaded

    @danielkza
    danielkza committed Nov 25, 2016
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  13. Restart services when init scripts/services change

    @danielkza
    danielkza committed Nov 25, 2016
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  14. Explicitly run systemd module with daemon-reload when necessary 

    The service module doesn't accept implementation-specific arguments
before Ansible 2.2.
    @danielkza
    danielkza committed Nov 25, 2016
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  15. Fix Redis sentinel configuration file permissions 

    The Sentinel config file contains the Redis password, and therefore,
cannot be publicly readable.

Also ensure files have the redis group set.
    @danielkza
    danielkza committed Nov 25, 2016
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  16. Update prepare-config script 

    - Reduce verbosity
- Only set permissions of dynamic config file (not it's containing
directory)
- Correctly use redis user and group from template
    @danielkza
    danielkza committed Nov 25, 2016
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  17. Fix systemd daemon-reload in pre-2.2 Ansible

    @danielkza
    danielkza committed Nov 25, 2016
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