Log parent quota

[Furisto]

Description

Log the quota of the parent. Today with https://github.com/gitpod-io/ops/issues/1244 and in yesterdays incident we saw that the parent value can be the reason for not being able to set cgroup values. It should therefore be included in the error to speed up analysis.

Related Issue(s)

n.a.

How to test

• Edit ws-daemon config-map

 "cpulimit": {
          "enabled": true,
          "totalBandwidth": "12",
          "limit": "2",
          "burstLimit": "6",
          "controlPeriod": "15s",
          "cgroupBasePath": "/mnt/node-cgroups"
        },

• Edit ws-manager config map

  "limits": {
              "cpu": "4",
              "memory": "",
              "ephemeral-storage": ""
            }

• Restart ws-daemon and ws-manager
• Open workspace and run stress in the workspace

Release Notes

NONE

[kylos101]

@Furisto may I ask you to share how you tested? I'm not sure if this is something you can do in core-dev, or workspace-preview?

[Furisto]

@kylos101 I think you could overwrite the configmap of the ws-manager. Let me check...

[Furisto]

{"@type":"type.googleapis.com/google.devtools.clouderrorreporting.v1beta1.ReportedErrorEvent","error":"cannot set CFS quota of 600000 (period is 100000, parent quota is 400000):\n github.com/gitpod-io/gitpod/ws-daemon/pkg/cpulimit.CgroupCFSController.SetLimit\n github.com/gitpod-io/gitpod/ws-daemon/pkg/cpulimit/cfs.go:55\n - write /mnt/node-cgroups/cpu/kubepods/burstable/pod3c3aed9f-859c-4880-a5ee-3a228c197dc3/bfb29396e078697c68937e6ef81a64763b6bad965c3b75f3b565c100a7b8103c/cpu.cfs_quota_us: invalid argument","instanceId":"91cfb18d-2c2a-4cae-afa9-e44710eef399","level":"warning","message":"cannot set CPU limit","serviceContext":{"service":"ws-daemon","version":"commit-4c27eb3eb8d2689ee94aae2529078e131bfd55f2"},"severity":"WARNING","time":"2022-02-22T17:24:58Z","userId":"","workspaceId":"gitpodio-templatetypescr-zgeoncnwteu"}

[Furisto]

@kylos Updated test instructions