Check Free disk space percent before upgrade

• Related issues: #4611 [ENHANCEMENT] Check free disk space percent before upgrade

Category:

• Upgrade Harvester

Verification Steps

1. Create a new Harvester cluster. Each node’s disk space should be 250G.

2. Use dd to write files to make sure one of the node’s free disk space is 20G, if every node’s /usr/local free space is more than 30G

   dd if=/dev/zero of=/usr/local/test.img bs=1G count=93 .
   

3. Ensure /usr/local did not have enough spaces

   rancher@n1-240104:~> df -h /usr/local
   Filesystem      Size  Used Avail Use% Mounted on
   /dev/vda5       147G   28G  112G  21% /usr/local
   rancher@n1-240104:~> sudo dd if=/dev/zero of=/usr/local/test.img bs=1G count=93
   93+0 records in
   93+0 records out
   99857989632 bytes (100 GB, 93 GiB) copied, 327.656 s, 305 MB/s
   rancher@n1-240104:~> df -h /usr/local
   Filesystem      Size  Used Avail Use% Mounted on
   /dev/vda5       147G  116G   24G  84% /usr/local
   

4. Create a test version

   apiVersion: harvesterhci.io/v1beta1
   kind: Version
   metadata:
   annotations:
       harvesterhci.io/minFreeDiskSpaceGB: "5"
   name: 1.2.2
   namespace: harvester-system
   spec:
   isoURL: http://192.168.0.181:8000/harvester-v1.2.2-amd64.iso
   minUpgradableVersion: 1.2.1
   releaseDate: "20231210"
   tags:
   - dev
   - test
   

5. Click upgrade on the dashboard

6. Remove the dd file

7. Ensure we free the /usr/local spaces

   rancher@n1-240104:/usr/local> sudo rm test.img
   rancher@n1-240104:/usr/local> df -h /usr/local
   Filesystem      Size  Used Avail Use% Mounted on
   /dev/vda5       147G   23G  118G  16% /usr/local
   

8. Click the upgrade again

Expected Results

• Should get an error message on the upgrade dashboard

• There is no error message on the upgrade dashboard, can trigger the upgrade process