values.yaml

# Default values for kube-httpcache.
# This is a YAML-formatted file.
# Declare variables to be passed into your templates.

replicaCount: 1

image:
  repository: quay.io/mittwald/kube-httpcache
  pullPolicy: IfNotPresent
  tag: "stable"

imagePullSecrets: []
nameOverride: ""
fullnameOverride: ""

# Enable StatefulSet (Deployment is default)
useStatefulset:
  enabled: true

# Enable configMap for Varnish Template File (see below vclTemplate)
# OR use extravolume with name "template" if the file is too big
configmap:
  enabled: true

# kube-httpcache specific configuration
cache:
  # name of frontend service
  # frontendService: kube-httpcache-headless
  # name of backend service
  backendService: backend-service
  # name of backend service namespace
  # backendServiceNamespace: backend-service-namespace
  # watching for frontend changes is true by default
  frontendWatch: true
  # watching for backend changes is true by default
  backendWatch: true
  # Varnish storage backend type (https://varnish-cache.org/docs/trunk/users-guide/storage-backends.html)
  varnishStorage: malloc # default,malloc,umem,file...
  # Varnish storage backend size
  storageSize: 128M # K(ibibytes), M(ebibytes), G(ibibytes), T(ebibytes) ... unlimited
  # Varnish transient storage backend type (https://varnish-cache.org/docs/trunk/users-guide/storage-backends.html)
  #varnishTransientStorage: malloc
  # Varnish transient storage backend size
  #transientStorageSize: 128M # K(ibibytes), M(ebibytes), G(ibibytes), T(ebibytes) ... unlimited
  # Secret for Varnish admin credentials
  #secret: "12345678"
  # Read admin credentials from user provided secret
  #existingSecret: kubecache-secret

cacheExtraArgs: {}
# cacheExtraArgs: |
  # - -v=8
  # - -varnish-additional-parameters=vcc_allow_inline_c=on

serviceAccount:
  # Specifies whether a service account should be created
  enabled: true
  # Annotations to add to the service account
  annotations: {}
  # The name of the service account to use.
  # If not set and create is true, a name is generated using the fullname template
  name: ""

rbac:
  enabled: true

# create a prometheus operator ServiceMonitor
serviceMonitor: false

podSecurityPolicy:
  enabled: false
  # name: unrestricted-psp

podAnnotations: {}

podSecurityContext: {}
  # fsGroup: 2000

securityContext: {}
  # capabilities:
  #   drop:
  #   - ALL
  # readOnlyRootFilesystem: true
  # runAsNonRoot: true
  # runAsUser: 1000

lifecycle: {}
  # preStop:
  #   exec:
  #     command:
  #     - /bin/sh
  #     - -c
  #     - touch /etc/varnish/fail_probes; sleep 25

topologySpreadConstraints: {}
  # - topologyKey: topology.kubernetes.io/zone
  #   maxSkew: 1
  #   whenUnsatisfiable: ScheduleAnyway
  #   labelSelector:
  #     matchLabels:
  #       app.kubernetes.io/name: kube-httpcache
  # - topologyKey: kubernetes.io/hostname
  #   maxSkew: 1
  #   whenUnsatisfiable: ScheduleAnyway
  #   labelSelector:
  #     matchLabels:
  #       app.kubernetes.io/name: kube-httpcache

initContainers: {}
# initContainers: |
#   - args:
#     - -c
#     - |
#       echo "Copying external varnish template from..."
#     command:
#     - sh
#     image: busybox:latest
#     imagePullPolicy: IfNotPresent
#     name: varnishtemplate
#     resources: {}
#     terminationMessagePath: /dev/termination-log
#     terminationMessagePolicy: File
#     volumeMounts:
#     - name: template
#       mountPath: /etc/varnish/tmpl

extraContainers: []
# - name: my-sidecar
#   image: myapp/my-sidecar
#   command:
#   - my-sidecar-command

extraVolumes: {}
# extraVolumes:
#   - emptyDir: {}
#     name: template

extraMounts: {}
# extraMounts:
#   - name: geoip
#     mountPath: /var/lib/geoip

exporter:
  enabled: false
  securityContext: {}
    # capabilities:
    #   drop:
    #   - ALL
    # readOnlyRootFilesystem: true
    # runAsNonRoot: true
    # runAsUser: 1000
  resources: {}
  livenessProbe: {}
  # livenessProbe:
  #   httpGet:
  #    path: /
  #    port: 6083
  readinessProbe: {}

service:
  type: ClusterIP
  port: 80
  target: 8080

ingress:
  enabled: false
  annotations: {}
    # kubernetes.io/ingress.class: nginx
    # kubernetes.io/tls-acme: "true"
  hosts: []
  # hosts:
  #   - host: www.example.com
  #     paths:
  #       - path: /
  #         pathType: Prefix
  #         backend:
  #           service:
  #             name: kube-httpcache
  #             port:
  #               number: 80
  #       - path: /backend
  #         backend:
  #           name: backend-service
  #           port:
  #             number: 8080
  #   - host: www2.example.com
  #     paths:
  #       - path: /
  #         pathType: Prefix
  #         backend:
  #           name: kube-httpcache
  #           port:
  #             number: 80
  tls: []
  #  - secretName: chart-example-tls
  #    hosts:
  #      - chart-example.local

resources: {}
  # We usually recommend not to specify default resources and to leave this as a conscious
  # choice for the user. This also increases chances charts run on environments with little
  # resources, such as Minikube. If you do want to specify resources, uncomment the following
  # lines, adjust them as necessary, and remove the curly braces after 'resources:'.
  # limits:
  #   cpu: 100m
  #   memory: 128Mi
  # requests:
  #   cpu: 100m
  #   memory: 128Mi

autoscaling:
  enabled: false
  minReplicas: 1
  maxReplicas: 100
  targetCPUUtilizationPercentage: 80
  # targetMemoryUtilizationPercentage: 80

nodeSelector: {}

tolerations: []

#terminationGracePeriodSeconds: 60

affinity: {}

livenessProbe: {}
# livenessProbe:
#   httpGet:
#    path: /
#    port: 6083
readinessProbe: {}

vclTemplate: |
  vcl 4.0;

  import std;
  import directors;

  // ".Frontends" is a slice that contains all known Varnish instances
  // (as selected by the service specified by -frontend-service).
  // The backend name needs to be the Pod name, since this value is compared
  // to the server identity ("server.identity" [1]) later.
  //
  //   [1]: https://varnish-cache.org/docs/6.4/reference/vcl.html#local-server-remote-and-client
  {{ range .Frontends }}
  backend {{ .Name }} {
      .host = "{{ .Host }}";
      .port = "{{ .Port }}";
  }
  {{- end }}

  {{ range .Backends }}
  backend be-{{ .Name }} {
      .host = "{{ .Host }}";
      .port = "{{ .Port }}";
  }
  {{- end }}

  sub vcl_init {
      new cluster = directors.hash();

      {{ range .Frontends -}}
      cluster.add_backend({{ .Name }}, 1);
      {{ end }}

      new lb = directors.round_robin();

      {{ range .Backends -}}
      lb.add_backend(be-{{ .Name }});
      {{ end }}
  }

  sub vcl_recv
  {
      # Set backend hint for non cachable objects.
      set req.backend_hint = lb.backend();

      # ...

      # Routing logic. Pass a request to an appropriate Varnish node.
      # See https://info.varnish-software.com/blog/creating-self-routing-varnish-cluster for more info.
      unset req.http.x-cache;
      set req.backend_hint = cluster.backend(req.url);
      set req.http.x-shard = req.backend_hint;
      if (req.http.x-shard != server.identity) {
          return(pass);
      }
      set req.backend_hint = lb.backend();

      # ...

      return(hash);
  }