Comments (7)
discordianfish
commented on August 27, 2024
Not oppose to this in general but I feel @beorn7 might have opinions on this 😬
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SuperQ
commented on August 27, 2024
This is not actually a Docker container issue, nor even a node_exporter issue. The log timestamp control is hard coded to UTC in common/promlog.
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SuperQ
commented on August 27, 2024
If you want logs in a local timestamp, docker logs -t or journalctl -u will print local timestamps.
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instantdreams
commented on August 27, 2024
This is an issue with the docker image - tzdata is not being passed for timezone support. Of all the other containers I have, there are a small number (node_reporter, loki, prometheus, one or two others) that fail to do this.
It is not about the local timestamps either. Here's some test results.
First, using docker:
$ docker logs node-exporter-1
ts=2024-04-17T17:37:05.228Z caller=tls_config.go:274 level=info msg="Listening on" address=[::]:9100
ts=2024-04-17T17:37:05.228Z caller=tls_config.go:277 level=info msg="TLS is disabled." http2=false address=[::]:9100
$ docker logs node-exporter-1 -t
2024-04-17T17:37:05.228790493Z ts=2024-04-17T17:37:05.228Z caller=tls_config.go:274 level=info msg="Listening on" address=[::]:9100
2024-04-17T17:37:05.229047084Z ts=2024-04-17T17:37:05.228Z caller=tls_config.go:277 level=info msg="TLS is disabled." http2=false address=[::]:9100
Second, using docker compose:
$ docker compose logs
node-exporter-1 | ts=2024-04-17T17:37:05.228Z caller=tls_config.go:274 level=info msg="Listening on" address=[::]:9100
node-exporter-1 | ts=2024-04-17T17:37:05.228Z caller=tls_config.go:277 level=info msg="TLS is disabled." http2=false address=[::]:9100
$ docker compose logs --timestamps
node-exporter-1 | 2024-04-17T17:37:05.228790493Z ts=2024-04-17T17:37:05.228Z caller=tls_config.go:274 level=info msg="Listening on" address=[::]:9100
node-exporter-1 | 2024-04-17T17:37:05.229047084Z ts=2024-04-17T17:37:05.228Z caller=tls_config.go:277 level=info msg="TLS is disabled." http2=false address=[::]:9100
Can this please be reopened and the timezone support be considered?
Thank you
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SuperQ
commented on August 27, 2024
Like I said, it does not matter what we do here. The code will ignore it no matter what. This is an issue with the promlog package.
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instantdreams
commented on August 27, 2024
Excellent. Where can I raise an issue for the promlog package team to update the docker container to include tzdata to support timezone?
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discordianfish
commented on August 27, 2024
@instantdreams https://github.com/prometheus/common - but it's somewhat of a philosophical decision: https://prometheus.io/docs/introduction/faq/#can-i-change-the-timezone-why-is-everything-in-utc
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