-
Notifications
You must be signed in to change notification settings - Fork 1.9k
New issue
Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.
By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.
Already on GitHub? Sign in to your account
Feature Request: Add specification-based metrics #4280
Comments
I second this request and am quite surprised this wasn't already an included metric. Especially since Nomad has such strict hard memory caps. In order for to be actually useful, we need a way to determine the percentage of memory the allocation has used or has free, whether I have to calculate it against another metric that just has .memory.allocated or is a percentage like memory.total_percent doesn't matter but this is a really important metric to alleviate the pain of Nomad's strict memory caps. I personally suggest the following to be consistent with the other |
Anyone? Having the ability to compare current alloc resource consumption (especially memory) against the limit for those resources would be incredibly useful. |
Related to #4280 This PR adds `client.allocs.<job>.<group>.<alloc>.<task>.memory.allocated` as a gauge in bytes to metrics to ease calculating how close a task is to OOMing. ``` 'nomad.client.allocs.memory.allocated.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 268435456.000 'nomad.client.allocs.memory.cache.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 5677056.000 'nomad.client.allocs.memory.kernel_max_usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 0.000 'nomad.client.allocs.memory.kernel_usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 0.000 'nomad.client.allocs.memory.max_usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 8908800.000 'nomad.client.allocs.memory.rss.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 876544.000 'nomad.client.allocs.memory.swap.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 0.000 'nomad.client.allocs.memory.usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 8208384.000 ```
Sorry for the lack of response. I quick added an allocated metric in bytes in #5492. There's a Linux binary attached if anyone is will to test. |
That looks like it'll solve my use case! |
Related to #4280 This PR adds `client.allocs.<job>.<group>.<alloc>.<task>.memory.allocated` as a gauge in bytes to metrics to ease calculating how close a task is to OOMing. ``` 'nomad.client.allocs.memory.allocated.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 268435456.000 'nomad.client.allocs.memory.cache.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 5677056.000 'nomad.client.allocs.memory.kernel_max_usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 0.000 'nomad.client.allocs.memory.kernel_usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 0.000 'nomad.client.allocs.memory.max_usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 8908800.000 'nomad.client.allocs.memory.rss.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 876544.000 'nomad.client.allocs.memory.swap.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 0.000 'nomad.client.allocs.memory.usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 8208384.000 ```
Related to #4280 This PR adds `client.allocs.<job>.<group>.<alloc>.<task>.memory.allocated` as a gauge in bytes to metrics to ease calculating how close a task is to OOMing. ``` 'nomad.client.allocs.memory.allocated.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 268435456.000 'nomad.client.allocs.memory.cache.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 5677056.000 'nomad.client.allocs.memory.kernel_max_usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 0.000 'nomad.client.allocs.memory.kernel_usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 0.000 'nomad.client.allocs.memory.max_usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 8908800.000 'nomad.client.allocs.memory.rss.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 876544.000 'nomad.client.allocs.memory.swap.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 0.000 'nomad.client.allocs.memory.usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 8208384.000 ```
Related to #4280 This PR adds `client.allocs.<job>.<group>.<alloc>.<task>.memory.allocated` as a gauge in bytes to metrics to ease calculating how close a task is to OOMing. ``` 'nomad.client.allocs.memory.allocated.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 268435456.000 'nomad.client.allocs.memory.cache.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 5677056.000 'nomad.client.allocs.memory.kernel_max_usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 0.000 'nomad.client.allocs.memory.kernel_usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 0.000 'nomad.client.allocs.memory.max_usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 8908800.000 'nomad.client.allocs.memory.rss.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 876544.000 'nomad.client.allocs.memory.swap.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 0.000 'nomad.client.allocs.memory.usage.example.cache.6d98cbaf-d6bc-2a84-c63f-bfff8905a9d8.redis.rusty': 8208384.000 ```
Having the memory metric is great, but it would still be nice to get other metrics based on the intent of the submitted job spec. Here are the metrics we are 'backfilling' via a spec-polling process:
submit_time is very useful for annotating deploys on dashboards. |
just to add a real-world use case for these, here's an example of an alerting query we have to notify when a service has less than 60% of its desired allocations reporting as health in consul: |
👍 for the group_count type of metric, we would love to scale up/down nodes based on the "desired" task group count. |
Have there been any new developments on this request, particularly the |
If you have a question, prepend your issue with
[question]
or preferably use the nomad mailing list.If filing a bug please include the following:
Nomad version
Nomad v0.7.1 (0b295d3)
Operating system and Environment details
Debian Linux 8.7
Issue
We've been using the prometheus-exported job metrics, which have been really useful. However, it would be even more useful if we could get metrics based on the latest evaluated job specification. There may be other useful metrics, but the metrics that immediately jump to mind are:
Memory in particular would be useful in order to determine tasks that are close to getting OOM-killed.
The text was updated successfully, but these errors were encountered: