Configurations

Helm Chart values

Read Helm Chart for details.

Configuration file

accurate-controller reads its configurations from a configuration file.

The repository includes an example as follows:

# Labels to be propagated to sub-namespaces.
# It is also possible to specify a glob pattern that can be interpreted by Go's "path.Match" func.
# https://pkg.go.dev/path#Match
labelKeys:
- team

# Annotations to be propagated to sub-namespaces.
# It is also possible to specify a glob pattern that can be interpreted by Go's "path.Match" func.
# https://pkg.go.dev/path#Match
annotationKeys:
# An example to propagate an annotation for MetalLB
# https://metallb.universe.tf/usage/#requesting-specific-ips
- metallb.universe.tf/address-pool

# Labels to be propagated to sub-namespaces from SubNamespace resource.
# It is also possible to specify a glob pattern that can be interpreted by Go's "path.Match" func.
# https://pkg.go.dev/path#Match
subNamespaceLabelKeys:
- app

# Annotations to be propagated to sub-namespaces from SubNamespace resource.
# It is also possible to specify a glob pattern that can be interpreted by Go's "path.Match" func.
# https://pkg.go.dev/path#Match
subNamespaceAnnotationKeys:
- foo.bar/baz

# List of GVK for namespace-scoped resources that can be propagated.
# Any namespace-scoped resource is allowed.
watches:
- group: rbac.authorization.k8s.io
  version: v1
  kind: Role
- group: rbac.authorization.k8s.io
  version: v1
  kind: RoleBinding
- version: v1
  kind: Secret
- version: v1
  kind: ResourceQuota

# List of nameing policy for SubNamespaces.
# root and match are both regular expressions.
# When a SubNamespace is created in a tree starting from a root namespace and the root namespace's name matches the "root" regular expression, the SubNamespace name is validated with the "match" regular expression.
#
# "match" namingPolicies can use variables of regexp capture group naming of "root" namingPolicies.
# example:
#   root: ^app-(?P<team>.*)
#   match: ^app-${team}-.*
#   root namespace: app-team1
#   compiled match naming policy: ^app-team1-.*
# This feature is provided using https://pkg.go.dev/regexp#Regexp.Expand
namingPolicies: []

Only labels and annotations specified in the configuration file will be inherited.
Be careful that some labels or annotations affect security configurations or the system. For example, pod-security.kubernetes.io/* labels control the security capabilities of Pods in a Namespace.

Likewise, Accurate watches only namespace-scope resources specified in the configuration file.

You can edit the Helm Chart values as needed.

<snip>
controller:
  config:
    # controller.config.labelKeys -- Labels to be propagated to sub-namespaces.
    # It is also possible to specify a glob pattern that can be interpreted by Go's "path.Match" func.
    ## https://pkg.go.dev/path#Match
    labelKeys: []
    # - team

    # controller.config.annotationKeys -- Annotations to be propagated to sub-namespaces.
    # It is also possible to specify a glob pattern that can be interpreted by Go's "path.Match" func.
    ## https://pkg.go.dev/path#Match
    annotationKeys: []
    # An example to propagate an annotation for MetalLB
    # https://metallb.universe.tf/usage/#requesting-specific-ips
    # - metallb.universe.tf/address-pool

    # Labels to be propagated to sub-namespaces from SubNamespace resource.
    # It is also possible to specify a glob pattern that can be interpreted by Go's "path.Match" func.
    # https://pkg.go.dev/path#Match
    subNamespaceLabelKeys:
    - app

    # Annotations to be propagated to sub-namespaces from SubNamespace resource.
    # It is also possible to specify a glob pattern that can be interpreted by Go's "path.Match" func.
    # https://pkg.go.dev/path#Match
    subNamespaceAnnotationKeys:
    - foo.bar/baz

    # controller.config.watches -- List of GVK for namespace-scoped resources that can be propagated.
    # Any namespace-scoped resource is allowed.
    watches:
      - group: rbac.authorization.k8s.io
        version: v1
        kind: Role
      - group: rbac.authorization.k8s.io
        version: v1
        kind: RoleBinding
      - version: v1
        kind: Secret

    # controller.config.namingPolicies -- List of nameing policy for SubNamespaces.
    # root and match are both regular expressions.
    # When a SubNamespace is created in a tree starting from a root namespace and the root namespace's name matches the "root" regular expression, the SubNamespace name is validated with the "match" regular expression.
    #
    # "match" namingPolicies can use variables of regexp capture group naming of "root" namingPolicies.
    # example:
    #   root: ^app-(?P<team>.*)
    #   match: ^app-${team}-.*
    #   root namespace: app-team1
    #   compiled match naming policy: ^app-team1-.*
    # This feature is provided using https://pkg.go.dev/regexp#Regexp.Expand
    namingPolicies:
      - root:  foo
        match: foo_.*
      - root:  bar
        match: bar_.*
      - root:  ^app-(?P<team>.*)
        match: ^app-${team}-.*
<snip>

ClusterRoleBindings

A built-in ClusterRole admin is bound by default to allow accurate-controller to watch and propagate namespace-scope resources. However, admin does not contain verbs for ResourceQuota and may not contain custom resources.

If you need to watch and propagate resources not included in admin ClusterRole, add additional ClusterRole/ClusterRoleBinding to accurate-controller-manager ServiceAccount. Set the controller.additionalRBAC.rules in the Helm Chart values.

The following example Helm chart values is to watch and propagate ResourceQuotas.

<snip>
controller:
  additionalRBAC:
    # controller.additionalRBAC.rules -- Specify the RBAC rules to be added to the controller.
    # ClusterRole and ClusterRoleBinding are created with the names `{{ release name }}-additional-resources`.
    # The rules defined here will be used for the ClusterRole rules.
    rules:
      - apiGroups:
          - ""
        resources:
          - resourcequotas
        verbs:
          - get
          - list
          - watch
          - create
          - update
          - patch
          - delete
<snip>

Feature Gates

Feature gates are a set of key=value pairs that describe operator features. You can turn these features on or off using the --feature-gates command line flag. Use -h flag to see a full set of feature gates.

To set feature gates, use the --feature-gates flag assigned to a list of feature pairs:

--feature-gates=...,DisablePropagateGenerated=false

The following table is a summary of the feature gates that you can set.

  • The "Since" column contains the Accurate release when a feature is introduced or its release stage is changed.
  • The "Until" column, if not empty, contains the last Accurate release in which you can still use a feature gate.

{{< table caption="Feature gates for features in Alpha or Beta states" sortable="true" >}}

FeatureDefaultStageSinceUntil
DisablePropagateGeneratedfalseAlpha1.2.01.3.0
DisablePropagateGeneratedtrueBeta1.3.0

Each feature gate is designed for enabling/disabling a specific feature: