freeleaps-ops/cluster/manifests/freeleaps-infra-system/telepresence/telepresence-oss/templates/agentInjectorWebhook.yaml

{{- if and (not (and .Values.rbac .Values.rbac.only)) .Values.agentInjector.enabled }}
{{- $namespaceSelector := mustFromJson (include "traffic-manager.namespaceSelector" $) }}
{{- /*
Perform a check that the new namespaceSelector doesn't select namespaces that are
already managed by some other traffic-manager.
*/}}
{{- $namespaces := (lookup "v1" "Namespace" "" "").items }}
{{- $configs := dict }}
{{- $cmName := include "traffic-manager.name" $ }}
{{- $cmNs := include "traffic-manager.namespace" $}}
{{- /* Find all existing traffic-manager configmaps and their namespaceSelectors */}}
{{- range $namespaces }}
  {{- $ns := .metadata.name }}
  {{- $cm := lookup "v1" "ConfigMap" $ns $cmName }}
  {{- with $cm }}
    {{- with fromYaml (get .data "namespace-selector.yaml" ) }}
      {{- $configs = set $configs $ns . }}
    {{- end }}
  {{- end }}
{{- end }}
{{- /* No use testing if the added selector is the only one */}}
{{- if $configs }}
  {{- $configs = set $configs $cmNs $namespaceSelector }}
  {{- /* Validate that no selector overlaps with another */}}
  {{- $allManagedNamespaces := dict }}
  {{- range $configNs, $config := $configs }}
    {{- $rqs := $config.matchExpressions }}
    {{- /* Normalise the selector, i.e. turn each matchLabel into a machRequirement */}}
    {{- range $key, $value := $config.matchLabels }}
      {{- $rqs = append $rqs (dict "key" $key "operator" "In" "values" (list $value))}}
    {{- end }}
    {{- /* Figure out what namespaces this selector selects, and for each one, assert that it's not selected already */}}
    {{- range $namespaces }}
      {{- $ns := .metadata.name }}
      {{- $labels := .metadata.labels }}
      {{- $isMatch := true }}
      {{- range $rqs }}
        {{- $rqMatch := false }}
        {{- $val := get $labels .key }}
        {{- if eq .operator "In" }}
          {{- $rqMatch = has $val .values }}
        {{- else if eq .operator "NotIn" }}
          {{- $rqMatch = not (has $val .values) }}
        {{- else if eq .operator "Exists" }}
          {{- $rqMatch = not (eq $val "") }}
        {{- else if eq .operator "DoesNotExist" }}
          {{- $rqMatch = eq $val "" }}
        {{- else }}
          {{- fail printf "unsupported labelSelectorOperator %s" .operator}}
        {{- end }}
        {{- if not $rqMatch }}
          {{- $isMatch = false }}
          {{- break }}
        {{- end }}
      {{- end }}
      {{- if $isMatch }}
        {{- $conflictingConfig := get $allManagedNamespaces $ns }}
        {{- if $conflictingConfig }}
          {{- if eq $conflictingConfig $cmNs }}
            {{- $conflictingConfig = $configNs }}
          {{- end }}
          {{- fail (printf "traffic-manager in namespace %s already manages namespace %s" $conflictingConfig $ns) }}
        {{- end }}
        {{- $allManagedNamespaces = set $allManagedNamespaces $ns $configNs }}
      {{- end }}
    {{- end }}
  {{- end }}
{{- end }}
{{- $altNames := list ( printf "agent-injector.%s" (include "traffic-manager.namespace" $)) ( printf "agent-injector.%s.svc" (include "traffic-manager.namespace" $)) -}}
{{- $genCA := genCA "agent-injector-ca" 365 -}}
{{- $genCert := genSignedCert "agent-injector" nil $altNames 365 $genCA -}}
{{- $secretData := (lookup "v1" "Secret" (include "traffic-manager.namespace" $) .Values.agentInjector.secret.name).data -}}
---
apiVersion: admissionregistration.k8s.io/v1
kind: MutatingWebhookConfiguration
metadata:
{{- if eq .Values.agentInjector.certificate.method "certmanager" }}
  annotations:
    cert-manager.io/inject-ca-from: {{ include "traffic-manager.namespace" $}}/{{ .Values.agentInjector.secret.name }}
{{- end }}
  name: {{ .Values.agentInjector.webhook.name }}-{{ include "traffic-manager.namespace" $ }}
  labels:
    {{- include "telepresence.labels" $ | nindent 4 }}
webhooks:
{{- with .Values.agentInjector.webhook.admissionReviewVersions }}
- admissionReviewVersions:
  {{- toYaml . | nindent 2 }}
{{- end }}
  clientConfig:
{{- if not (eq .Values.agentInjector.certificate.method "certmanager") }}
{{- if and ($secretData) (or (not .Values.agentInjector.certificate.regenerate) (eq .Values.agentInjector.certificate.method "supplied") )}}
    caBundle: {{ or (get $secretData "ca.crt") (get $secretData "ca.pem") }}
{{- else }}
    caBundle: {{ $genCA.Cert | b64enc }}
{{- end }}
{{- end }}
    service:
      name: {{ .Values.agentInjector.name }}
      namespace: {{ include "traffic-manager.namespace" $ }}
      path: {{ .Values.agentInjector.webhook.servicePath }}
      port: {{ .Values.agentInjector.webhook.port }}
  rules:
  - apiGroups:
    - ""
    apiVersions:
    - v1
    operations:
    - CREATE
    - DELETE
    resources:
    - pods
    scope: '*'
  failurePolicy: {{ .Values.agentInjector.webhook.failurePolicy }}
  reinvocationPolicy: {{ .Values.agentInjector.webhook.reinvocationPolicy }}
  name: agent-injector-{{ include "traffic-manager.namespace" $ }}.telepresence.io
  sideEffects: {{ .Values.agentInjector.webhook.sideEffects }}
  timeoutSeconds: {{ .Values.agentInjector.webhook.timeoutSeconds }}
  namespaceSelector:
{{- toYaml $namespaceSelector | nindent 4 }}
{{- if not (or (eq .Values.agentInjector.certificate.method "certmanager") (eq .Values.agentInjector.certificate.method "supplied")) }}
---
apiVersion: v1
kind: Secret
metadata:
  name: {{ .Values.agentInjector.secret.name }}
  namespace: {{ include "traffic-manager.namespace" $ }}
  labels:
    {{- include "telepresence.labels" $ | nindent 4 }}
data:
{{- if and ($secretData) (not .Values.agentInjector.certificate.regenerate) }}
  ca.crt: {{ or (get $secretData "ca.crt") (get $secretData "ca.pem") }}
  tls.crt: {{ or (get $secretData "tls.crt") (get $secretData "crt.pem") }}
  tls.key: {{ or (get $secretData "tls.key") (get $secretData "key.pem") }}
{{- else }}
  ca.crt: {{ $genCA.Cert | b64enc }}
  tls.crt: {{ $genCert.Cert | b64enc }}
  tls.key: {{ $genCert.Key | b64enc }}
{{- end }}
{{- end }}
{{- end }}