attempt at adding error pages

Reviewed-on: coop-cloud/traefik#38

.env.sample

@@ -1,6 +1,6 @@
 TYPE=traefik
 
-DOMAIN={{ .Domain }}
+DOMAIN=traefik.example.com
 LETS_ENCRYPT_ENV=production
 
 LETS_ENCRYPT_EMAIL=certs@example.com
@@ -15,6 +15,9 @@ COMPOSE_FILE="compose.yml"
 # General settings                                                  #
 #####################################################################
 
+## Error pages
+COMPOSE_FILE="$COMPOSE_FILE:compose.error-pages.yml"
+
 ## Host-mode networking
 #COMPOSE_FILE="$COMPOSE_FILE:compose.host.yml"
 

abra.sh

@@ -1,3 +1,3 @@
-export TRAEFIK_YML_VERSION=v14
+export TRAEFIK_YML_VERSION=v15
 export FILE_PROVIDER_YML_VERSION=v6
 export ENTRYPOINT_VERSION=v2

compose.error-pages.yml

@@ -0,0 +1,36 @@
+version: '3.8'
+
+services:
+  error-pages:
+    image: tarampampam/error-pages:latest # Using the latest tag is highly discouraged. Please, use tags in X.Y.Z format
+    environment:
+      TEMPLATE_NAME: app-down
+    networks:
+      - proxy
+    deploy:
+      placement:
+        constraints:
+          - node.role == worker
+      labels:
+         - "traefik.enable=true"
+         - "traefik.docker.network=proxy"
+         - # use as "fallback" for any non-registered services (with priority below normal)
+         - "traefik.http.routers.error-pages-router.rule=HostRegexp(`{host:.+}`)"
+         - "traefik.http.routers.error-pages-router.priority=10"
+         - # should say that all of your services work on https
+         - "traefik.http.routers.error-pages-router.tls=true"
+         - "traefik.http.routers.error-pages-router.entrypoints=https"
+         - "traefik.http.routers.error-pages-router.middlewares=error-pages-middleware"
+         - "traefik.http.services.error-pages-service.loadbalancer.server.port=8080"
+         - # "errors" middleware settings
+         - "traefik.http.middlewares.error-pages-middleware.errors.status=400-599"
+         - "traefik.http.middlewares.error-pages-middleware.errors.service=error-pages-service"
+         - "traefik.http.middlewares.error-pages-middleware.errors.query=/{status}.html"
+
+  app:
+    deploy:
+      labels:
+        # next line is important
+        - "traefik.http.routers.${STACK_NAME}.middlewares=error-pages-middleware"
+        - "traefik.http.services.${STACK_NAME}.loadbalancer.server.port=80"
+

compose.yml

@@ -3,7 +3,7 @@ version: "3.8"
 
 services:
   app:
-    image: "traefik:v2.9.1"
+    image: "traefik:v2.9.6"
     # Note(decentral1se): *please do not* add any additional ports here.
     # Doing so could break new installs with port conflicts. Please use
     # the usual `compose.$app.yml` approach for any additional ports
@@ -47,7 +47,7 @@ services:
         - "traefik.http.routers.${STACK_NAME}.tls.options=default@file"
         - "traefik.http.routers.${STACK_NAME}.service=api@internal"
         - "traefik.http.routers.${STACK_NAME}.middlewares=security@file"
-        - "coop-cloud.${STACK_NAME}.version=2.0.0+v2.9.1"
+        - "coop-cloud.${STACK_NAME}.version=2.0.3+v2.9.6"
 
 networks:
   proxy:

traefik.yml.tmpl

@@ -102,5 +102,5 @@ certificatesResolvers:
         provider: {{ (env "LETS_ENCRYPT_DNS_CHALLENGE_PROVIDER") }}
         resolvers:
           - "1.1.1.1:53"
-          - "8.8.8.8:53"
+          - "9.9.9.9:53"
       {{ end }}