support for reading the systemd journal is not compiled into this build of promtail

[mindrunner]

Describe the bug
Using grafana/promtail latest, I see this error message when I try to use systemd logs.

level=warn ts=2025-02-12T16:09:46.125808224Z caller=journaltargetmanager.go:29 msg="WARNING!!! Journal target was configured but support for reading the systemd journal is not compiled into this build of promtail!"

To Reproduce
Steps to reproduce the behavior:

1. Started Loki latest
2. Started Promtail latest to tail 'systemd' logs

Expected behavior
journalctl systemd logs are being sent

Environment:

• Infrastructure: docker-compose
• Deployment tool: docker-compose

Screenshots, Promtail config, or terminal output

server:
  http_listen_port: 9080
  grpc_listen_port: 0
  log_level: debug

positions:
  filename: /tmp/positions.yaml

clients:
  - url: http://loki:3000/loki/api/v1/push

scrape_configs:
  - job_name: journal
    journal:
      json: false
      max_age: '12h'
      path: /run/log/journal
      labels:
        job: systemd-journal
    relabel_configs:
      - source_labels: ['__journal__systemd_unit']
        regex: 'agave.service'
        action: keep
      - source_labels: ['__journal__systemd_unit']
        target_label: 'unit'
      - source_labels: ['__journal_syslog_identifier']
        target_label: 'syslog_identifier'

[instantdreams]

When using image: grafana/promtail:latest the following was observed:

2025-02-12T16:42:35.414670510Z level=warn ts=2025-02-12T16:42:35.34821709Z caller=journaltargetmanager.go:29 msg="WARNING!!! Journal target was configured but support for reading the systemd journal is not compiled into this build of promtail!"
2025-02-12T16:42:35.414743930Z level=warn ts=2025-02-12T16:42:35.350539938Z caller=promtail.go:265 msg="enable watchConfig"

Changing to image: grafana/promtail:3.3.2 returned the following:

2025-02-12T17:46:05.187206984Z level=warn ts=2025-02-12T17:46:05.100130135Z caller=promtail.go:263 msg="enable watchConfig"

Reverting does at least fix the issue.

[mindrunner]

Works for me! Thanks @instantdreams.

[ashwanthgoli]

reopening as a patch release is not yet out

[ashwanthgoli]

@mindrunner can you try with v3.4.2 release?

[mindrunner]

@mindrunner can you try with v3.4.2 release?

works for me

[ashwanthgoli]

great! closing the issue