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logstash-journald

Example Dockerfile for Logstash, with journald input. Docker image hosted at state/logstash-journald.

This uses the official Logstash repo as its base. Currently it comes with version 1.5.2. It then installs the logstash-input-journald plugin.

Note that the logstash process runs as root, so it can access the journal.

Usage

Please follow the Logstash instructions. You'll need to mount the /var/log/journal directory as a read-only volume:

docker run \
  --rm \
  -v /var/log/journal:/var/log/journal:ro \
  state/logstash-journald:1.5.2 \
  logstash -e 'input { journald { } } output { stdout { codec => rubydebug } }'

See logstash-input-journald for input configuration. Note that the Docker image already sets SINCEDB_DIR to /var/lib/logstash-journald. You can mount a host directory as this volume in order to preserve the journal offset between restarts.

Building

Use make gem to create a gem for the logstash-input-journald plugin. make build can create the Docker image, tagged with the Logstash version and a commit ref. make tags then tags this image with just the Logstash version. make push will push to state/logstash-journald.

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Example Dockerfile for Logstash, with journald input

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