Bug 1962172 - Single node CI e2e tests kubelet metrics endpoints intermittent downtime
Summary: Single node CI e2e tests kubelet metrics endpoints intermittent downtime
Alias: None
Product: OpenShift Container Platform
Classification: Red Hat
Component: Monitoring
Version: 4.8
Hardware: Unspecified
OS: Unspecified
Target Milestone: ---
: 4.8.0
Assignee: Simon Pasquier
QA Contact: Junqi Zhao
Depends On:
TreeView+ depends on / blocked
Reported: 2021-05-19 12:55 UTC by Omer Tuchfeld
Modified: 2021-09-20 10:43 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: No Doc Update
Doc Text:
Clone Of:
Last Closed: 2021-07-27 23:09:14 UTC
Target Upstream Version:

Attachments (Terms of Use)
Screenshot showing intermittent downtime in the kubelet metrics endpoints (61.21 KB, image/png)
2021-05-19 12:55 UTC, Omer Tuchfeld
no flags Details

System ID Private Priority Status Summary Last Updated
Github openshift cluster-monitoring-operator pull 1175 0 None open Bug 1962172: increase scrape timeouts for kubelet endpoints 2021-05-21 14:26:30 UTC
Red Hat Product Errata RHSA-2021:2438 0 None None None 2021-07-27 23:09:36 UTC

Description Omer Tuchfeld 2021-05-19 12:55:27 UTC
Created attachment 1784811 [details]
Screenshot showing intermittent downtime in the kubelet metrics endpoints

Description of problem:
The kubelet metrics endpoints are intermittently unavailable during single-node e2e tests on AWS. See `up = 0` query attached screenshot that shows it quite clearly.

This sometimes causes the TargetDown alert (https://github.com/openshift/cluster-monitoring-operator/blob/30339d233720f96dc3ecaf5059bd150aec6735f6/assets/cluster-monitoring-operator/prometheus-rule.yaml#L16-L30) to be raised.

Version-Release number of selected component (if applicable):
Happened in this nightly

How reproducible:

Steps to Reproduce:
Happens during single node e2e nightlies https://testgrid.k8s.io/redhat-single-node#periodic-ci-openshift-release-master-nightly-4.8-e2e-aws-single-node

Actual results:
Kubelet metrics endpoints shouldn't have significant downtime

Expected results:
They have significant intermittent downtime

Additional info:

Comment 1 Ryan Phillips 2021-05-20 15:17:34 UTC
testing pr https://github.com/openshift/kubernetes/pull/755

Comment 6 Junqi Zhao 2021-05-26 01:57:58 UTC
tested with 4.8.0-0.nightly-2021-05-25-180327, searched with up == 0, did not see kubelet service down within 2 hours

Comment 9 errata-xmlrpc 2021-07-27 23:09:14 UTC
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: OpenShift Container Platform 4.8.2 bug fix and security update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.


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