openstack-helm-infra/helm-toolkit/templates/manifests/_network_policy.tpl

{{/*
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/}}

{{/*
abstract: |
  Creates a network policy manifest for services.
values: |
  network_policy:
    myLabel:
      podSelector:
        matchLabels:
          component: api
      ingress:
      - from:
        - podSelector:
            matchLabels:
              application: keystone
        ports:
        - protocol: TCP
          port: 80
      egress:
      - ports:
        - port: 53
          protocol: UDP
        to:
        - namespaceSelector:
            matchLabels:
              name: kube-system
          podSelector:
            matchLabels:
              application: kubernetes
              component: coredns
usage: |
  {{ dict "envAll" . "name" "application" "label" "myLabel" | include "helm-toolkit.manifests.kubernetes_network_policy" }}
return: |
  ---
  apiVersion: networking.k8s.io/v1
  kind: NetworkPolicy
  metadata:
    name: RELEASE-NAME
    namespace: NAMESPACE
  spec:
    policyTypes:
      - Ingress
      - Egress
    podSelector:
      matchLabels:
        application: myLabel
        component: api
    ingress:
    - from:
      - podSelector:
          matchLabels:
            application: keystone
      ports:
      - protocol: TCP
        port: 80
    egress:
    - ports:
      - port: 53
        protocol: UDP
      to:
      - namespaceSelector: {}
        podSelector:
          matchLabels:
            application: kubernetes
            component: coredns
*/}}

{{- define "helm-toolkit.manifests.kubernetes_network_policy" -}}
{{- $envAll := index . "envAll" -}}
{{- $name := index . "name" -}}
{{- $label := index . "label" -}}
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: {{ $label | replace "_" "-" }}-netpol
  namespace: {{ $envAll.Release.Namespace }}
spec:
{{- if hasKey (index $envAll.Values "network_policy") $label }}
  policyTypes:
{{- $is_egress := false -}}
{{- if hasKey (index $envAll.Values.network_policy $label) "policyTypes" }}
{{- if has "Egress" (index $envAll.Values.network_policy $label "policyTypes") }}
{{ $is_egress = true }}
{{- end }}
{{- end }}
{{ if or $is_egress (index $envAll.Values.network_policy $label "egress") }}
    - Egress
{{- end }}
{{- $is_ingress := false -}}
{{- if hasKey (index $envAll.Values.network_policy $label) "policyTypes" }}
{{- if has "Ingress" (index $envAll.Values.network_policy $label "policyTypes") }}
{{- $is_ingress = true -}}
{{- end }}
{{- end }}
{{ if or $is_ingress (index $envAll.Values.network_policy $label "ingress") }}
    - Ingress
{{- end }}
{{- end }}
  podSelector:
    matchLabels:
      {{ $name }}: {{ $label }}
{{- if hasKey (index $envAll.Values "network_policy") $label }}
{{- if hasKey (index $envAll.Values.network_policy $label) "podSelector" }}
{{- if index $envAll.Values.network_policy $label "podSelector" "matchLabels" }}
{{ index $envAll.Values.network_policy $label "podSelector" "matchLabels" | toYaml | indent 6 }}
{{ end }}
{{ end }}
{{ end }}
{{- if hasKey (index $envAll.Values "network_policy") $label }}
{{- if index $envAll.Values.network_policy $label "egress" }}
  egress:
{{ index $envAll.Values.network_policy $label "egress" | toYaml | indent 4 }}
{{- end }}
{{- end }}
{{- if hasKey (index $envAll.Values "network_policy") $label }}
{{- if index $envAll.Values.network_policy $label "ingress" }}
  ingress:
{{ index $envAll.Values.network_policy $label "ingress" | toYaml | indent 4 }}
{{- end }}
{{- end }}
{{- end }}