kubernetes config_error ai_generated true

Error: UPGRADE FAILED: cannot patch "my-release" with kind Deployment: Deployment.apps "my-release" is invalid: spec.selector: Invalid value: v1.LabelSelector{...}: field is immutable

ID: kubernetes/helm-upgrade-failed-dry-run

Also available as: JSON · Markdown · 中文
85%Fix Rate
87%Confidence
1Evidence
2024-01-10First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
helm 3.12 active — — —
kubernetes 1.27 active — — —
helm 3.13 active — — —

Root Cause

A Helm upgrade attempts to modify an immutable field (e.g., spec.selector) on an existing Deployment, which is not allowed by the Kubernetes API.

generic

中文

Helm 升级尝试修改现有 Deployment 上的不可变字段（例如 spec.selector），这是 Kubernetes API 不允许的。

Official Documentation

https://helm.sh/docs/helm/helm_upgrade/

Workarounds

  1. 95% success Run `kubectl delete deployment my-release` to remove the Deployment, then perform `helm upgrade --install my-release ./chart` to recreate it with the new selector. 
    Run `kubectl delete deployment my-release` to remove the Deployment, then perform `helm upgrade --install my-release ./chart` to recreate it with the new selector.
  2. 85% success If the selector change is unintended, rollback: `helm rollback my-release <revision>` to a version before the change, then modify the chart to avoid immutable field changes. 
    If the selector change is unintended, rollback: `helm rollback my-release <revision>` to a version before the change, then modify the chart to avoid immutable field changes.

中文步骤

  1. 运行 `kubectl delete deployment my-release` 删除 Deployment，然后执行 `helm upgrade --install my-release ./chart` 使用新选择器重新创建。
  2. 如果选择器更改是意外的，回滚：`helm rollback my-release <revision>` 到更改前的版本，然后修改 chart 以避免不可变字段更改。

Dead Ends

Common approaches that don't work:

  1. 80% fail

    The --force flag in Helm only recreates resources if the release name changes, but does not bypass immutable field validation on existing resources.

  2. 90% fail

    Editing the selector after creation is also rejected by the API; the field is immutable for all operations.

  3. 70% fail

    The old Deployment persists and still has the immutable field; Helm will try to patch it again.