feat: add file provider

traefik/templates/_podtemplate.tpl

@@ -133,6 +133,10 @@
           - name: plugins
             mountPath: "/plugins-storage"
           {{- end }}
+          {{- if .Values.providers.file.enabled }}
+          - name: traefik-extra-config
+            mountPath: "/etc/traefik/dynamic"
+          {{- end }}
           {{- if .Values.additionalVolumeMounts }}
             {{- toYaml .Values.additionalVolumeMounts | nindent 10 }}
           {{- end }}
@@ -564,6 +568,14 @@
           - "--providers.kubernetesingress.namespaces={{ template "providers.kubernetesIngress.namespaces" $ }}"
           {{- end }}
           {{- end }}
+          {{- with .Values.providers.file }}
+          {{- if .enabled }}
+          - "--providers.file.directory=/etc/traefik/dynamic"
+          {{- if .watch }}
+          - "--providers.file.watch=true"
+          {{- end }}
+          {{- end }}
+          {{- end }}
           {{- range $entrypoint, $config := $.Values.ports }}
           {{- if $config }}
             {{- if $config.redirectTo }}
@@ -728,6 +740,11 @@
         - name: plugins
           emptyDir: {}
         {{- end }}
+        {{- if .Values.providers.file.enabled }}
+        - name: traefik-extra-config
+          configMap:
+            name: {{ template "traefik.fullname" . }}-file-provider
+        {{- end }}
       {{- if .Values.affinity }}
       affinity:
         {{- tpl (toYaml .Values.affinity) . | nindent 8 }}

traefik/templates/daemonset.yaml

@@ -31,6 +31,9 @@ metadata:
   {{- toYaml . | nindent 4 }}
   {{- end }}
   annotations:
+  {{- if and .Values.providers.file.enabled (not .Values.providers.file.watch) }}
+    checksum/traefik-dynamic-conf: {{ include (print $.Template.BasePath "/provider-file-cm.yaml") . | sha256sum }}
+  {{- end }}
   {{- with .Values.deployment.annotations }}
   {{- toYaml . | nindent 4 }}
   {{- end }}

traefik/templates/deployment.yaml

@@ -29,6 +29,9 @@ metadata:
   {{- toYaml . | nindent 4 }}
   {{- end }}
   annotations:
+  {{- if and .Values.providers.file.enabled (not .Values.providers.file.watch) }}
+    checksum/traefik-dynamic-conf: {{ include (print $.Template.BasePath "/provider-file-cm.yaml") . | sha256sum }}
+  {{- end }}
   {{- with .Values.deployment.annotations }}
   {{- toYaml . | nindent 4 }}
   {{- end }}

traefik/templates/provider-file-cm.yaml

@@ -0,0 +1,12 @@
+{{- if .Values.providers.file.enabled -}}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ template "traefik.fullname" . }}-file-provider
+  namespace: {{ template "traefik.namespace" . }}
+  labels:
+  {{- include "traefik.labels" . | nindent 4 }}
+data:
+  config.yml: |
+    {{ .Values.providers.file.content | nindent 4 }}
+{{- end -}}

traefik/tests/provider-file_test.yaml

@@ -0,0 +1,124 @@
+suite: File provider
+templates:
+  - provider-file-cm.yaml
+  - deployment.yaml
+  - daemonset.yaml
+tests:
+  - it: should create a configMap and a volume
+    set:
+      providers:
+        file:
+          enabled: true
+    asserts:
+      - template: provider-file-cm.yaml
+        isKind: 
+          of: ConfigMap
+      - template: provider-file-cm.yaml
+        equal:
+          path: metadata.name
+          value: "RELEASE-NAME-traefik-file-provider"
+      - template: deployment.yaml
+        contains:
+          path: spec.template.spec.volumes
+          content: 
+            name: traefik-extra-config
+            configMap:
+              name: "RELEASE-NAME-traefik-file-provider"
+      - template: deployment.yaml
+        contains:
+          path: spec.template.spec.containers[0].volumeMounts
+          content: 
+            name: traefik-extra-config
+            mountPath: "/etc/traefik/dynamic"
+
+  - it: should add cli options with watch option
+    set:
+      providers:
+        file:
+          enabled: true
+          watch: true
+    asserts:
+      - template: deployment.yaml
+        contains:
+          path: spec.template.spec.containers[0].args
+          content: "--providers.file.directory=/etc/traefik/dynamic"
+      - template: deployment.yaml
+        contains:
+          path: spec.template.spec.containers[0].args
+          content: "--providers.file.watch=true"
+      - template: deployment.yaml
+        isNull:
+          path: metadata.annotations["checksum/traefik-dynamic-conf"]
+
+  - it: should add checksum annotations and no watch cli option
+    set:
+      providers:
+        file:
+          enabled: true
+          watch: false
+    asserts:
+      - template: deployment.yaml
+        contains:
+          path: spec.template.spec.containers[0].args
+          content: "--providers.file.directory=/etc/traefik/dynamic"
+      - template: deployment.yaml
+        notContains:
+          path: spec.template.spec.containers[0].args
+          content: "--providers.file.watch=true"
+      - template: deployment.yaml
+        isNotEmpty:
+          path: metadata.annotations["checksum/traefik-dynamic-conf"]
+
+  - it: should add content to configMap
+    set:
+      providers:
+        file:
+          enabled: true
+          watch: false
+          content: &x-providers-file-content |
+            middlewares:
+              Middleware00:
+                addPrefix:
+                  prefix: foobar
+    asserts:
+      - template: provider-file-cm.yaml
+        equal:
+          path: data["config.yml"]
+          value: *x-providers-file-content
+      - template: deployment.yaml
+        isNotEmpty:
+          path: metadata.annotations["checksum/traefik-dynamic-conf"]
+
+  - it: should add checksum annotations for daemonset
+    set:
+      deployment:
+        kind: DaemonSet
+      providers:
+        file:
+          enabled: true
+          watch: false
+    asserts:
+      - template: daemonset.yaml
+        isNotEmpty:
+          path: metadata.annotations["checksum/traefik-dynamic-conf"]
+
+  - it: should not provide ConfigMap, add extra volume and extra CLI args by default
+    asserts:
+      - template: provider-file-cm.yaml
+        hasDocuments:
+          count: 0
+      - template: deployment.yaml
+        notContains:
+          path: spec.template.spec.volumes
+          content: 
+            name: traefik-extra-config
+            configMap:
+              name: "RELEASE-NAME-traefik-file-provider"
+      - template: deployment.yaml
+        notContains:
+          path: spec.template.spec.containers[0].args
+          content: "--providers.file.directory=/etc/traefik/dynamic"
+      - template: deployment.yaml
+        notContains:
+          path: spec.template.spec.containers[0].args
+          content: "--providers.file.watch=true"

traefik/values.yaml

@@ -252,6 +252,23 @@ providers:
       # By default this Traefik service
       # pathOverride: ""
 
+  file:
+    # -- Create a file provider
+    enabled: false
+    # -- Allows Traefik to automatically watch for file changes
+    watch: true
+    # -- File content (YAML format, go template supported) (see https://doc.traefik.io/traefik/providers/file/)
+    content: ""
+      # http:
+      #   routers:
+      #     router0:
+      #       entryPoints:
+      #       - web
+      #       middlewares:
+      #       - my-basic-auth
+      #       service: service-foo
+      #       rule: Path(`/foo`)
+
 #
 # -- Add volumes to the traefik pod. The volume name will be passed to tpl.
 # This can be used to mount a cert pair or a configmap that holds a config.toml file.