Docker Logs management

Node Operators FAQ
1

The log files of my nodes are getting larger and larger within Docker. How have you organized for space management? Do you “prune” logs sometimes?

2

You could try this…

3 Likes
3

Hello,

I personnaly configure the docker log driver : Configure logging drivers | Docker Documentation

I just create this file : /etc/docker/daemon.json

with the following content :

{
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "10m",
    "max-file": "3" 
  }
}

it’s fine for me as I have docker only for for Storagenode and anyway 10m is enough for most cases.

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4

I keep them all. Rotated on each node restart, so around every two weeks, then compressed with xz. This way they don’t take much space.

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5

I am using log rotate with the following configuration:

sudo vi /etc/logrotate.d/storagenodes

/mnt/WD1003/logs/*.log
{
        weekly
        missingok
        rotate 4
        copytruncate
        compress
        notifempty
}

sudo logrotate -vf /etc/logrotate.d/

Plus the docker run command with the following parameters:

…
    --log-opt max-size=1g \
    --log-opt max-file=5 \
…
    --mount type=bind,source="/mnt/WD1003/logs",destination=/app/logs \
…
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