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Discover new versions

Update your Helm repository to fetch the latest available chart versions: 
helm repo update
Example output: 
Hang tight while we grab the latest from your chart repositories...
...Successfully got an update from the "plerion" chart repository
Update Complete. ⎈Happy Helming!⎈
List available versions of the collector manager chart: 
helm search repo plerion/collector-manager --versions
Example output: 
NAME                        CHART VERSION APP VERSION DESCRIPTION
plerion/collector-manager   v1.1.0        v1.1.0      A Helm chart for Plerion Kubernetes Capabilities
plerion/collector-manager   v1.0.0        v1.0.0      A Helm chart for Plerion Kubernetes Capabilities

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Upgrade collector manager

Upgrade to a specific version while preserving existing configuration values: 
helm upgrade plerion-collector-manager plerion/collector-manager \
  --reuse-values \
  --version [version] \
  -n plerion-system
Example output: 
Release "plerion-collector-manager" has been upgraded. Happy Helming!
NAME: plerion-collector-manager
LAST DEPLOYED: Mon Nov 20 19:26:30 2023
NAMESPACE: plerion-system
STATUS: deployed
REVISION: 2

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Command breakdown

  • plerion-collector-manager: Name of the existing Helm release.
  • plerion/collector-manager: Chart to upgrade.
  • --reuse-values: Retain existing configuration during upgrade.
  • --version [version]: Replace with the desired version.

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Rollback

Rolling back reverts to a previous, stable release if an upgrade causes issues.

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When to rollback

  • Unforeseen issues: Updated release introduces errors or instability.
  • Compatibility concerns: New version conflicts with other components.
  • Emergency recovery: Critical issues disrupt the system.

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Rollback

Rolling back reverts to a previous, stable release if an upgrade causes issues.

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When to rollback

  • Unforeseen issues: Updated release introduces errors or instability.
  • Compatibility concerns: New version conflicts with other components.
  • Emergency recovery: Critical issues disrupt the system.

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Steps to rollback

1

Check release history

Identify the revision you want to roll back to:
helm history -n plerion-system plerion-collector-manager
Example output:
REVISION UPDATED                  STATUS      CHART                      APP VERSION DESCRIPTION
1        Tue Nov 20 12:18:00 2023 superseded  collector-manager-v1.0.0   v1.0.0      Install complete
2        Wed Nov 21 09:00:35 2023 superseded  collector-manager-v1.0.0   v1.0.0      Upgrade complete
3        Wed Nov 22 19:00:42 2023 deployed    collector-manager-v1.1.0   v1.1.0      Upgrade complete
Note the revision number you want to roll back to.
2

Roll back to a previous revision

Run the following command, replacing <REVISION_NUMBER> with the revision identified above:
helm rollback -n plerion-system plerion-collector-manager <REVISION_NUMBER>
Example:
helm rollback -n plerion-system plerion-collector-manager 2
Example output:
Rollback was a success! Happy Helming!
3

Verify rollback

After the rollback, confirm that the collector manager pods are running in a stable state:
kubectl get pods -n plerion-system
Example output:
NAME                                         READY   STATUS    RESTARTS   AGE
plerion-collector-manager-ccbc55c5d-dr27w    1/1     Running   0          10m
plerion-collector-manager-ccbc55c5d-x255n    1/1     Running   0          10m

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Troubleshooting

If rollback fails or issues persist, check Helm release status: 
helm status -n plerion-system plerion-collector-manager
Review the output for detailed errors and next steps.
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