[bitnami/redis] Can't find log file on Unraid

[Cnote43]

Name and Version

bitnami/redis

What architecture are you using?

amd64

What steps will reproduce the bug?

1. On Unraid 6.12.13 and 7.0.0. I'm trying to troubleshoot a problem with Authelia, where the redis authentication key is getting deleted before its TTL, but I can't do that without a redis log file.

2. With the default config file

3. Run this:

docker run
  -d
  --name='redis'
  --net='bridge-network'
  --pids-limit 2048
  -e TZ="America/Denver"
  -e HOST_OS="Unraid"
  -e HOST_HOSTNAME="hostname"
  -e HOST_CONTAINERNAME="redis"
  -e 'ALLOW_EMPTY_PASSWORD'='no'
  -e 'REDIS_PASSWORD'='redis_password'
  -e 'REDIS_EXTRA_FLAGS'='--auto-aof-rewrite-percentage 100
  --auto-aof-rewrite-min-size 64mb'
  -e 'REDIS_LOG_DIR'='/logs'
  -e 'REDIS_LOG_FILE'='redis.log'
  -l net.unraid.docker.managed=dockerman
  -l net.unraid.docker.icon='https://raw.githubusercontent.com/A75G/docker-templates/master/templates/icons/redis.png'
  -p '6379:6379/tcp'
  -v '/mnt/user/appdata/redis':'/bitnami/redis/data':'rw' 'bitnami/redis:latest'
541ea19a6b231ca157dce63295913f9b9fef70efa9cb404994fd5f4cc9a64f82

4. Error: I can't find a log file inside the container or in the mapped volume. I don't have a log server and would rather not spin one up just for this purpose if it's possible to just get a log file created that I can view. I'm sure this is a config problem on my part but I haven't been able to make it work.

What is the expected behavior?

To have a log file created.

What do you see instead?

No log file found.

Additional information

No response

[javsalgar]

Hi!

With this

  -e 'REDIS_LOG_DIR'='/logs'
  -e 'REDIS_LOG_FILE'='redis.log'

It would be writing at /logs/redis.log, are you mounting a volume there?

[Cnote43]

Thanks for trying to help. I figured this was a config issue. I wasn't previously mounting a volume for /logs, but I think I am now. I've got:

-v '/mnt/user/appdata/redis/logs/':'/logs':'rw'

But no log file is showing up there. Is that the wrong way to map the volume?

[javsalgar]

I believe the reason is this

redis_conf_set logfile "" # Log to stdout

This is set in the container postunpack.sh because, in containers, the best practice is to log to stdout. For your use case, you may need to edit the redis.conf file and change that setting. You can mount your own configuration file as explained here https://github.com/bitnami/containers/tree/main/bitnami/redis#configuration-file