Docker image update: Redis 6 and 25% smaller image size

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I’ve got an instance where I have added:

after_redis:
  - replace:
      filename: "/etc/redis/redis.conf"
      from: /^databases.*/
      to: "databases 50"

And it’s failing to rebuild because:

25:M 01 Dec 2020 20:21:08.830 # FATAL: Data file was created with a Redis server configured to handle
 more than 16 databases. Exiting

Is there some other hook that I can snag to update the databases count before it tries to migrate or whatever it does?

Hmm. And now after the apparently failed rebuild, I see this in docker logs:

chgrp: invalid group: ‘syslog’
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