How to clean up discarded PVs and their corresponding folders

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pv yes k8s Important storage resources in . Since it's storage , That involves taking up disk space . In the use of k8s In the process of clustering , If you don't pay attention to cleaning and discarding pv, Then it's easy to accumulate a lot of garbage pv, Not only is it inconvenient k8s Management of , It may also lead to insufficient disk space .

This article is written by storage class Dynamically supplied pv For example , Demo obsolete pv and nfs Clean up the corresponding folder on the server .

If the pv I'm not familiar with the recycling strategy , Can browse k8s in pv Recycling strategy for This article （ The title of the article on the left contains hyperlinks , You can directly click to jump ）.

1 Confirm the status before cleaning

Confirm current k8s Clustered pv Number .

Confirm current nfs The number of files under the shared path of the server .

Confirm current nfs Disk usage of the server .

2 Export obsolete pv stay nfs The corresponding path on the server

kubectl get pv \
	-o custom-columns=STATUS:.status.phase,PATH:.spec.nfs.path \
	|grep Released  \
	|awk '{print $2}' \
	> 156.txt

there 156.txt Text for storing path information , Because of the master Node's intranet IP by 192.168.130.156, So it's called 156.txt, In their own cleaning process , You can name this file as you like .

Exported text ：

/nfs/k8s/aektemp-data-volume-2-geos-object-store-xa21e-1-pvc-00a765e0-f3f8-4ab8-839f-70e3a89e01a7
/nfs/k8s/gektest-data-volume-geos-relational-store-j7ns8-kerc-0-pvc-0117511b-a121-463b-9115-1877e7bee67a
/nfs/k8s/gek-data-volume-gs-spatiotemporal-index-store-nn2h0-coordinator-0-pvc-01290353-91b1-4640-a8c3-a7f859bcdb72
/nfs/k8s/csh05-data-volume-1-geos-object-store-iamgf-0-pvc-021a966b-04f3-4c50-a852-8462e3af95e7
……
/nfs/k8s/aektemp-data-volume-geos-in-memory-store-xvytd-0-pvc-02fa0401-fdba-4368-800d-43d3b957c2bc
/nfs/k8s/aek-queue-data-volume-arcgis-queue-store-0-pvc-036ffb00-f734-44f7-9a8a-d2028092decc

3 clear k8s The abandonment of pv

Write the following code to the computer , And run , You can clean it up pv.

#!/bin/bash
whiteList=`kubectl get pv |grep Released |awk '{print $1}'`
echo "${whiteList}" | while read line
do
  kubectl patch pv ${line}  -p '{"spec":{"persistentVolumeReclaimPolicy":"Delete"}}'
done

As shown in the figure below , After running the script ,Released State of pv Have been deleted ,pv Quantity from 583 Down to 38.

4 clear nfs Obsolete files on the server

Will be the first 2 The text file generated in step and the following code are written nfs The server , And run ${ Script path } ${ Text path }, Such as ./cleaner.sh 156.txt, That is, you can clean up waste files .

#!/bin/bash
whiteList=`cat $1`
echo "${whiteList}" | while read line
do
  rm -rf  "$line"
done

The results are shown in the following figure , Cleaned up 500 Multiple folders , and 60 many G Of disk space .

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