Kubeblocks Upgrade

Upgrade KubeBlocks Operator

Overview

This skill covers upgrading the KubeBlocks operator (the controller that manages database clusters). The upgrade is done via helm upgrade on the kubeblocks chart. Running database clusters are not affected — they keep running during the operator upgrade. After upgrading the operator, addons may need to be upgraded separately.

Official docs: Upgrade to v1.0.x, Upgrade to v0.9.x

Workflow

- [ ] Step 1: Check current version
- [ ] Step 2: Pre-upgrade checklist
- [ ] Step 3: Update CRDs
- [ ] Step 4: Helm upgrade
- [ ] Step 5: Verify operator pods
- [ ] Step 6: Upgrade addons (optional)

Step 1: Check Current Version

helm list -n kb-system | grep kubeblocks

Or with kbcli: kbcli version

Upgrade paths:

Step 2: Pre-Upgrade Checklist

• Backup important clusters using the backup skill
• Read release notes for the target version: https://kubeblocks.io/docs/preview/user_docs/release_notes
• For v0.8 → v0.9 or v0.9 → v1.0: follow the version-specific docs; major jumps require intermediate steps

Step 3: Update CRDs

CRDs are separate from the Helm chart. Update them before the helm upgrade:

# Replace {VERSION} with target version, e.g. v1.0.2
kubectl replace -f https://github.com/apecloud/kubeblocks/releases/download/{VERSION}/kubeblocks_crds.yaml

For v0.9.x same-minor upgrade (e.g. v0.9.1 → v0.9.5), you can skip CRD update and use --set crd.enabled=false in Step 4 for faster deployment.

Step 4: Helm Upgrade

4a: Update Helm Repo

helm repo add kubeblocks https://apecloud.github.io/helm-charts
helm repo update kubeblocks

4b: Upgrade

Global network (docker.io):

helm -n kb-system upgrade kubeblocks kubeblocks/kubeblocks --version {VERSION}

China mainland network:

helm -n kb-system upgrade kubeblocks kubeblocks/kubeblocks --version {VERSION} \
  --set image.registry=apecloud-registry.cn-zhangjiakou.cr.aliyuncs.com \
  --set dataProtection.image.registry=apecloud-registry.cn-zhangjiakou.cr.aliyuncs.com \
  --set addonChartsImage.registry=apecloud-registry.cn-zhangjiakou.cr.aliyuncs.com

v0.9.x same-minor (faster): add --set crd.enabled=false

v0.8 → v0.9: requires --set admissionWebhooks.enabled=true --set admissionWebhooks.ignoreReplicasCheck=true and pre-steps (annotate addons, delete incompatible OpsDefinitions). See upgrade-to-v09-version.

Step 5: Verify Operator Pods

kubectl -n kb-system get pods

Expected: kubeblocks and kubeblocks-dataprotection pods in Running state. Typical: 1–3 min. If stuck >5 min: kubectl -n kb-system describe pods and kubectl -n kb-system logs deployment/kubeblocks.

Step 6: Upgrade Addons (Optional)

Addon upgrade may restart clusters. Since v1.0.0, existing clusters are generally not affected by addon upgrade, but test in non-production first.

Upgrade all addons with KubeBlocks:

helm -n kb-system upgrade kubeblocks kubeblocks/kubeblocks --version {VERSION} --set upgradeAddons=true

Upgrade specific addon: see install-addons. For migrating clusters to a new addon version, see migrate-clusters-to-new-addon.

Troubleshooting

CRD replace fails: For K8s <= 1.23, try kubectl create -f ... || kubectl replace -f .... Add --validate=false if x-kubernetes-validations errors occur.

Image pull errors: Switch to China mirror registry (Step 4b). Verify: helm get values kubeblocks -n kb-system.

Pods not Running: Check kubectl -n kb-system logs deployment/kubeblocks and GitHub Issues.

Safety Patterns

For dry-run before apply, status confirmation, and production cluster protection, see safety-patterns.md.