No data displayed... because of timezone mismatch between grafana and cAdvisor

[ebreton]

Hi guys,

I have encountered the same symptom as a few earlier: no data displayed in my grafana dashboard.

When looking closer, I found out that grafana was using the timezone of my Mac (UTC) whereas cAdvisor was pushing its metrics with a 9:30 hours shift...

Therefore, data appears on Grafana... but in the past.. :)

Do you know any way to fix this ?

I have post a question on cAdvisor (google/cadvisor#1562) but may be you know faster ^^

Cheers
Manu

[llitfkitfk]

can you volume the host timezone to cAdvisor and try again?

[ebreton]

sorry, I don't get what I have to do :(

[llitfkitfk]

docker run -it alpine:3.4 sh

https://wiki.alpinelinux.org/wiki/Setting_the_timezone

use docker cp copy the right timezone of the alpine container to host

run cAdvisor -v /host/alpine-timezone:/cadvisor-container-timezone

[ebreton]

I have modified the alpine image as suggested. And the docker-compose down and up again.

It now works as expected :)

But is there a way to automate this ? It is not very satisfying this way...

[llitfkitfk]

@ebreton this is the only way to change container timezone.

Or you can make you own Dockerfile:

FROM cadvisor
ADD ./expected-timezone /container-timezone

I think you can close this issue.

[ebreton]

yep. good advice for the Dockerfile. Cheers !