what's the unit of time() and container_last_seen

[Yong Zhang]

Hi, all

I'm using time()-container_last_seen(...) to check if container stopped, but it doesn't work. I'm trying to debug but could not understand the unit of time(), the value looks as below:

1512970126

What does this value mean? Thanks for the help.

[Ben Kochie]

time() returns UNIX Time in seconds[0].  This is a standard for various Prometheus metrics and operations.

For example, these metrics are UNIX times:

process_start_time_seconds

node_boot_time

[0]: https://en.wikipedia.org/wiki/Unix_time

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[Yong Zhang]

Thanks Ben.

I found even if one container stopped, container_last_seen() was still very close to time(), any way to monitor container stop event?

On Monday, 11 December 2017 16:36:41 UTC+8, Ben Kochie wrote:

time() returns UNIX Time in seconds[0].  This is a standard for various Prometheus metrics and operations.

For example, these metrics are UNIX times:

process_start_time_seconds

node_boot_time

[0]: https://en.wikipedia.org/wiki/Unix_time

On Mon, Dec 11, 2017 at 6:29 AM, Yong Zhang <hisca...@gmail.com> wrote:

Hi, all

I'm using time()-container_last_seen(...) to check if container stopped, but it doesn't work. I'm trying to debug but could not understand the unit of time(), the value looks as below:

1512970126

What does this value mean? Thanks for the help.

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[Ben Kochie]

Containers (cgroups) don't really have a start/stop state. Do you mean docker?  Maybe you need to get the state from docker?  I don't know if dockerd provides such information.

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