Related issue
https://github.com/longhorn/longhorn/issues/5842 https://github.com/longhorn/longhorn/issues/7539
Test step
Given Longhorn v1.4.x cluster running
And create and attach a volume (volume-1)
And upgraded Longhorn to v1.5.x
And create and attach a volume (volume-2)
When upgraded Longhorn to v1.6.0
Then v1.6.0 longhorn-manager Pods should be in crashloop
longhorn-manager-zrf8r 0/1 CrashLoopBackOff 2 (10s ago) 52s
longhorn-manager-zsph2 0/1 CrashLoopBackOff 2 (8s ago) 52s
longhorn-manager-grhsf 0/1 CrashLoopBackOff 2 (8s ago) 51s
And should see incompatible version error in longhorn-manager Pod logs
time="2023-08-17T03:03:20Z" level=fatal msg="Error starting manager: failed checking Engine upgrade path: incompatible Engine ei-7fa7c208 client API version: found version 7 is below required minimal version 8"
When downgraded Longhorn to v1.5.x
Then Longhorn components should be running
When upgraded v1.4.1 volume (volume-1) engine
And upgraded Longhorn to v1.6.0
Then Longhorn components should be running
And v1.4.x EngineImage state should be deployed and incompatible should be true.
NAME INCOMPATIBLE STATE IMAGE REFCOUNT BUILDDATE AGE
ei-74783864 false deployed longhornio/longhorn-engine:v1.5.1 10 28d 12m
ei-7fa7c208 true deployed longhornio/longhorn-engine:v1.4.1 0 157d 13m
ei-ad420081 false deployed c3y1huang/research:2017-lh-ei 0 44h 24s
When update existing volume/engine/replica custom resources spec.image with longhornio/longhorn-engine:v1.4.x
Then should be blocked