feat(helm-chart): enable podlabels configuration

[danielvincenzi]

Issue number: #616

Description of changes: Add optional podLabels to the Deployment and DaemonSet.

Testing done: Yes, only locally.

Terms of contribution:

By submitting this pull request, I agree that this contribution is dual-licensed under the terms of both the Apache License, version 2.0, and the MIT license.

[alexandrempm]

Great :-)

[alexaln30]

LGTM

[ArthurHLG]

Approved

[ytsssun]

Hi @danielvincenzi, thanks for cutting us this PR. I have done below tests to verify the behavior and it is working fine for me:

1. Upgrade the brupop via local chart
2. Use a sample value.yaml.

scheduler_cron_expression: '* 23 * * * Sun *'
podLabels:
  app: "brupop-test"
  environment: "beta"

3. Run helm upgrade brupop-operator deploy/charts/bottlerocket-update-operator -f values.yaml
4. Get the pods labels:

» kubectl get pods --namespace brupop-bottlerocket-aws --show-labels                                                   1 ↵
NAME                                         READY   STATUS    RESTARTS   AGE     LABELS
brupop-agent-dlppb                           1/1     Running   0          3m13s   app=brupop-test,brupop.bottlerocket.aws/component=agent,controller-revision-hash=67b54459db,environment=beta,pod-template-generation=3
brupop-agent-ffrtw                           1/1     Running   0          3m49s   app=brupop-test,brupop.bottlerocket.aws/component=agent,controller-revision-hash=67b54459db,environment=beta,pod-template-generation=3
brupop-agent-qg4g9                           1/1     Running   0          2m37s   app=brupop-test,brupop.bottlerocket.aws/component=agent,controller-revision-hash=67b54459db,environment=beta,pod-template-generation=3
brupop-apiserver-6bb84bcb55-72xj9            1/1     Running   0          3m58s   app=brupop-test,brupop.bottlerocket.aws/component=apiserver,environment=beta,pod-template-hash=6bb84bcb55
brupop-apiserver-6bb84bcb55-fkhh6            1/1     Running   0          4m19s   app=brupop-test,brupop.bottlerocket.aws/component=apiserver,environment=beta,pod-template-hash=6bb84bcb55
brupop-apiserver-6bb84bcb55-mmcww            1/1     Running   0          4m8s    app=brupop-test,brupop.bottlerocket.aws/component=apiserver,environment=beta,pod-template-hash=6bb84bcb55

The labels are applied to the pods as expected!

Only thing I would kindly request here is that, could you also help update the READMEs to reflect this new value?
Candidates:

• https://github.com/bottlerocket-os/bottlerocket-update-operator/blob/develop/deploy/charts/bottlerocket-update-operator/README.md
• https://github.com/bottlerocket-os/bottlerocket-update-operator/blob/develop/README.md