Connection Timeout from Worker node Kubernetes deployment for AIO-Duplex extended capacity scenario

Bug #1869700 reported by Yatindra on 2020-03-30
This bug affects 1 person
Affects Status Importance Assigned to Milestone

Bug Description

Brief Description
While installing Kubernetes-dashboard in AIO-Duplex extended capacity setup, kubernetes schedule pod in worker-0 but worker-0 is unable to downlod from docker registry
Provide the severity of the defect.

Major: Major for Duplex- extended setup

Steps to Reproduce
Try to run kubernetes pods in the worker-0 node. Unable to pull the image.

Expected Behavior
Docker image downloaded and scheduled on worker-0

Actual Behavior
Was not able to download the docker image at worker-.


System Configuration
AIO-Duplex extended capacity with proxy

Branch/Pull Time/Commit
STX 3.0 Stable release

Last Pass


Output of command:
[sysadmin@controller-0 ~(keystone_admin)]$ kubectl describe pod dashboard-metrics-scraper-7b8b58dc8b-2rf44 -n kubernetes-dashbo


  Type Reason Age From Message
  ---- ------ ---- ---- -------
  Normal Scheduled <unknown> default-scheduler Successfully assigned kubernetes-dashboard/dashboard-metrics-scraper-7b8b58dc8b-2rf44 to worker-0
  Normal Pulling 27s kubelet, worker-0 Pulling image "kubernetesui/metrics-scraper:v1.0.3"
  Warning Failed 12s kubelet, worker-0 Failed to pull image "kubernetesui/metrics-scraper:v1.0.3": rpc error: code = Unknown desc = Error response from daemon: Get net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
  Warning Failed 12s kubelet, worker-0 Error: ErrImagePull
  Normal SandboxChanged 4s (x2 over 11s) kubelet, worker-0 Pod sandbox changed, it will be killed and re-created.
  Normal BackOff 4s kubelet, worker-0 Back-off pulling image "kubernetesui/metrics-scraper:v1.0.3"
  Warning Failed 4s kubelet, worker-0 Error: ImagePullBackOff

Test Activity


Adding IP tables rules at active controller:

$sudo iptables -t nat -A POSTROUTING -p tcp -s -j MASQUERADE

Ghada Khalil (gkhalil) on 2020-06-01
tags: added: stx.containers
Ghada Khalil (gkhalil) wrote :

Added the domain & release tags. This will require further investigation from the containers team.
However, collect logs should be attached to enable the investigation.

tags: added: stx.3.0
Changed in starlingx:
status: New → Incomplete
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