Issue 439: Post upgrade script for helm upgrades

[SrishT]

Signed-off-by: SrishT [email protected]

Change log description

After upgrading pravega operator from 0.4.5 to 0.5.x via helm, the helm release corresponding to the PravegaCluster resource is not updated and a separate helm release is not created corresponding to the newly created BookkeeperCluster resource. Due to this, no further helm operations can be done on the pravega and bookkeeper clusters post the operator upgrade.

Purpose of the change

Fixes #439

What the code does

Upgrades the helm release corresponding to the PravegaCluster resource and creates a separate helm release corresponding to the newly created BookkeeperCluster resource, after pravega operator is upgraded from 0.4.5 to 0.5.x via helm.

How to verify it

After the operator upgrade completes, run the post-upgrade script in the following way

$ ./post-upgrade.sh <name of pravega cluster> <pravega release name> <bookkeeper release name> <version of pravega cluster> <namespace> <zookeeper svc name>

After this script executes successfully, helm upgrade and helm uninstall on the pravega and bookkeeper releases will also succeed.

[codecov-commenter]

Codecov Report

Merging #440 into master will decrease coverage by 0.09%.
The diff coverage is 47.82%.

@@            Coverage Diff             @@
##           master     #440      +/-   ##
==========================================
- Coverage   76.11%   76.02%   -0.10%     
==========================================
  Files          14       14              
  Lines        3320     3328       +8     
==========================================
+ Hits         2527     2530       +3     
- Misses        705      710       +5     
  Partials       88       88              

Impacted Files	Coverage Δ
pkg/apis/pravega/v1beta1/pravega.go	97.53% <ø> (ø)
pkg/apis/pravega/v1beta1/pravegacluster_types.go	14.92% <0.00%> (-0.12%)	⬇️
pkg/controller/pravega/pravega_controller.go	100.00% <100.00%> (ø)
pkg/controller/pravega/pravega_segmentstore.go	100.00% <100.00%> (ø)
pkg/util/pravegacluster.go	97.45% <100.00%> (-0.07%)	⬇️

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[Prabhaker24]

LGTM

[anishakj]

LGTM

[bourgeoisor]

This LGTM!