false allowPrivilegeEscala: true allowPrivilegedConta: false allowedCapabilities: [] readOnlyRootFilesyst: false defaultAddCapabiliti: [] requiredDropCapabili: - KILL - MKNOD - SETUID - SETGID fsGroup: type: MustRunAs ranges: - max: {{ .Values.securityContext.fsGroup }} min: {{ .Values.securityContext.fsGroup }} runAsUser: type: MustRunAs uid: {{ .Values.securityContext.runAsUser }} seLinuxContext: type: MustRunAs supplementalGroups: type: RunAsAny volumes: - configMap - downwardAPI - emptyDir - persistentVolumeClai...

        * Whether all containers should be non-root
        * Supplemental Groups
        * FSGroup - a special supplemental group
        * SELinux options
     * If a pod defines an FSGroup, that Pod’s system (emptyDir, secret, configMap,
etc) volumes and block-device volumes will be owned by the FSGroup, and each
container in the pod will run with the FSGroup as a supplemental group

  //
  // 1. The owning GID will be the FSGroup
  // 2. The setgid bit is set (new files created in the volume will be owned by FSGroup)
  // 3. The permission bits are OR'd with rw-rw----
  //
  // If unset, the Kubelet will not modify the ownership and permissions of any volume.
  // Note that this field cannot be set when spec.os.name is windows.
  // +optional
  optional int64 fsGroup = 5;

false allowPrivilegeEscala: true allowPrivilegedConta: false allowedCapabilities: [] readOnlyRootFilesyst: false defaultAddCapabiliti: [] requiredDropCapabili: - KILL - MKNOD - SETUID - SETGID fsGroup: type: MustRunAs ranges: - max: {{ .Values.securityContext.fsGroup }} min: {{ .Values.securityContext.fsGroup }} runAsUser: type: MustRunAs uid: {{ .Values.securityContext.runAsUser }} seLinuxContext: type: MustRunAs supplementalGroups: type: RunAsAny volumes: - configMap - downwardAPI - emptyDir - persistentVolumeClai...

  //
  // Defaults to ReadWriteOnceWithFSType, which will examine each volume
  // to determine if Kubernetes should modify ownership and permissions of the volume.
  // With the default policy the defined fsGroup will only be applied
  // if a fstype is defined and the volume's access mode contains ReadWriteOnce.
  //
  // +optional
  optional string fsGroupPolicy = 5;

  //
  // Defaults to ReadWriteOnceWithFSType, which will examine each volume
  // to determine if Kubernetes should modify ownership and permissions of the volume.
  // With the default policy the defined fsGroup will only be applied
  // if a fstype is defined and the volume's access mode contains ReadWriteOnce.
  //
  // +optional
  optional string fsGroupPolicy = 5;

    - [CSI Volume Snapshot graduates to General Availability](#csi-volume-snapshot-graduates-to-general-availability)
    - [Non-recursive Volume Ownership (FSGroup) graduates to Beta](#non-recursive-volume-ownership-fsgroup-graduates-to-beta)
    - [CSIDriver policy for FSGroup graduates to Beta](#csidriver-policy-for-fsgroup-graduates-to-beta)
    - [Security Improvements for CSI Drivers (Alpha)](#security-improvements-for-csi-drivers-alpha)

        - mountPath: /tmp/k8s-webhook-server/serving-certs
          name: cert
          readOnly: true
      nodeSelector:
        kubernetes.io/os: linux
      securityContext:
        fsGroup: 65534
        runAsNonRoot: true
        runAsUser: 65534
      serviceAccountName: controller
      terminationGracePeriodSeconds: 0
      volumes:
      - name: cert
        secret:

- PodSecurityPolicy objects now support a `MayRunAs` rule for `fsGroup` and `supplementalGroups` options. This allows specifying ranges of allowed GIDs for pods/containers without forcing a default GID the way `MustRunAs` does. This means that a container to which such a policy applies to won't use any fsGroup/supplementalGroup GID if not explicitly specified, yet a specified GID must still fall in the GID range according to the policy....

* Set fsGroup by securityContext.fsGroup in azure file. However,f user both sets gid=xxx in mountOptions in azure storage class and securityContext.fsGroup, gid=xxx setting in mountOptions takes precedence. ([#58316](https://github.com/kubernetes/kubernetes/pull/58316), [@andyzhangx](https://github.com/andyzhangx))