Ugly Command Party - Day 6
source: imgflip

Ugly Command Party - Day 6

Shea Stewart Shea Stewart

Shea Stewart

Technologist working in Platform & Customer Engineering Capacities @ RunWhen

发布日期: 2023年7月10日
+ 关注

Ugly Command Name: Check for RWO Persistent Volume Node Attachment Issues

What does it do?

Searches through a namespace and finds pods with RWO attached persistent volumes. It outputs the node that the pod is scheduled on along with the node that the volume is attached to. The two should be the same, and it will print as message saying if this is the case or if there is a mismatch.

When would you use it?

Very rarely, but from time to time, a pod has an issue being rescheduled due to a persistent volume that can’t detach from a node and reattach to the new node (where the pod is scheduled). This command can quickly highlight if there are any mismatches within the namespace.

What is the command?

Please view the GitHub Gist below to find the code snippet. Due to a limitation with LinkedIn, it does not accept some code in the code snippet and breaks the Article feature :-/


What is some sample output? 

-----
OK: Pod and Storage Node Matched
Pod: jenkins-0
PVC: jenkins
PV: pvc-ba67e928-8e9b-4a9a-be69-4f286e2e6af5
Node with Pod: gke-sandbox-cluster--sandbox-cluster--744aa9b5-5mvt
Node with Storage: gke-sandbox-cluster--sandbox-cluster--744aa9b5-5mvt

-----
OK: Pod and Storage Node Matched
Pod: jenkins2-0
PVC: jenkins2
PV: pvc-0f49efcb-f71e-4722-b0f2-c13ed7d647ea
Node with Pod: gke-sandbox-cluster--sandbox-cluster--744aa9b5-4fbx
Node with Storage: gke-sandbox-cluster--sandbox-cluster--744aa9b5-4fbx

What does it need?

  • kubectl
  • jq
  • base64

If you want this command tailored for your environment and ready to copy & paste, this command has been added to the open source library of commands available through RunWhen Local. Check it out here: https://docs.runwhen.com/public/runwhen-local/getting-started/running-locally


Find an example of the command here:

https://runwhen-local.sandbox.runwhen.com/jenkins/jenkins-PVC-Healthcheck/#check-for-rwo-persistent-volume-node-attachment-issues


Have an ugly command to share? Collaborate with us on GitHub with issues or discussions

This is part of a series.?Check out?this article?to see additional ugly commands posted in the series.

要查看或添加评论，请登录

Shea Stewart的更多文章

  • Check for Available Helm Chart Updates
    2023年8月4日

    Check for Available Helm Chart Updates

    Managing #helm Chart versions can be a bit of an interesting process..

    2 条评论
  • Reflections on 10 Days of Sharing Ugly Commands
    2023年7月20日

    Reflections on 10 Days of Sharing Ugly Commands

    As someone who spends a lot of time with #kubernetes technology and users, I recently embarked on a 10-day journey to…

  • Ugly Command Party - Day 10
    2023年7月15日

    Ugly Command Party - Day 10

    On the 10th of the ugly command party, the command I'll share is: Ugly Command Name: Find Ingress Owner and Service…

  • Ugly Command Party - Day 9
    2023年7月13日

    Ugly Command Party - Day 9

    On the 9th of the ugly command party, the command I'll share is: Ugly Command Name: Check Missing or Risky…

  • Ugly Command Party - Day 8
    2023年7月13日

    Ugly Command Party - Day 8

    On the 8th of the ugly command party, the command I'll share is: Ugly Command Name: List ImagePullBackOff Events and…

  • Ugly Command Party - Day 7
    2023年7月11日

    Ugly Command Party - Day 7

    On the 7th of the ugly command party, the command I'll share is: Ugly Command Name: Test Service Account Access to…

  • Ugly Command Party Day 5
    2023年7月7日

    Ugly Command Party Day 5

    On the 5th of the ugly command party, the command I'll share is: Ugly Command Name: List Images and Tags for Every…

  • Ugly Command Party - Day 4
    2023年7月6日

    Ugly Command Party - Day 4

    On the 4th of the ugly command party, the command I'll share is: Ugly Command Name: Fetch Ingress Object Health in…

  • Ugly Command Party - Day 3
    2023年7月5日

    Ugly Command Party - Day 3

    On the 3rd of the ugly command party, the command I'll share is: Ugly Command Name: Find Failed Certificate Requests…

  • Ugly Command Party - Day 2
    2023年7月4日

    Ugly Command Party - Day 2

    On the second day of the ugly command party, the command I'll share is: Ugly Command Name: Troubleshoot Unready…

社区洞察

其他会员也浏览了