attempt using staticresponse

[ci skip]

.env.sample

@@ -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"
 

README.md

@@ -23,4 +23,25 @@
    your Docker swarm box
 4. `abra app deploy YOURAPPDOMAIN`
 
+## Configuring wildcard SSL using DNS
+
+Automatic certificate generation will Just Work™ for most recipes  which use a fixed
+number of subdomains. For some recipes which need to work across arbitrary
+subdomains, like
+[`federatedwiki`](https://git.coopcloud.tech/coop-cloud/federatedwiki/) and
+[`go-ssb-room`](https://git.coopcloud.tech/coop-cloud/federatedwiki/), you'll
+need to give Traefik access to your DNS provider so that it can carry out
+Letsencrypt DNS challenges.
+
+1. Use Gandi or OVH for DNS 🤡 (support for other providers can be easily added,
+   see [the `lego` docs](https://go-acme.github.io/lego/dns/#dns-providers).
+2. Run `abra app config YOURAPPDOMAIN`
+3. Uncomment e.g. `ENABLE_GANDI` and the related `SECRET_.._VERSION` line, e.g.
+   `SECRET_GANDIV5_API_KEY_VERSION`
+4. Generate an API key for your provider
+5. Run `abra app secret insert YOURAPPDOMAIN SECRETNAME v1 SECRETVALUE`, where
+   `SECRETNAME` is from the compose file (e.g. `compose.gandi.yml`) e.g.
+   `gandiv5_api_key` and `SECRETVALUE` is the API key.
+6. Redeploy Traefik, using e.g. `abra app deploy YOURAPPDOMAIN -f`
+
 [`abra`]: https://git.autonomic.zone/autonomic-cooperative/abra

compose.error-pages.yml

@@ -0,0 +1,31 @@
+version: '3.8'
+
+services:
+
+  app:
+    command:
+      - --providers.docker
+      - --experimental.plugins.staticresponse.modulename=github.com/jdel/staticresponse
+      - --experimental.plugins.staticresponse.version=v0.0.1
+    deploy:
+      labels:
+        # custom traefik errors
+        - "traefik.http.middlewares.web-secure.errors.status=400-599"
+        - "traefik.http.middlewares.web-secure.errors.service=down-rule"
+        - "traefik.http.middlewares.web-secure.errors.query=/traefik-http-error/{status}"
+        # catchall rule
+        - "traefik.http.routers.http-catchall.entrypoints=web-secure"
+        - "traefik.http.routers.http-catchall.rule=PathPrefix(`/`)"
+        # lowest possible priority, evaluated when no other router is matched
+        - "traefik.http.routers.http-catchall.priority=1"
+        - "traefik.http.routers.http-catchall.middlewares=503down"
+        # static error message
+        - "traefik.http.middlewares.503down.plugin.staticresponse"
+        - "traefik.http.middlewares.503down.plugin.staticresponse.StatusCode=503"
+        - "traefik.http.middlewares.503down.plugin.staticresponse.Body=Sorry, currently under maintenance. Please try again later."
+        # error page
+        - "traefik.http.routers.down-rule.rule=PathPrefix(`/traefik-http-error`)"
+        - "traefik.http.routers.down-rule.service=noop@internal"
+        - "traefik.http.routers.down-rule.entrypoints=web-secure"
+        - "traefik.http.routers.down-rule.middlewares=503down"
+        

compose.yml

@@ -3,7 +3,7 @@ version: "3.8"
 
 services:
   app:
-    image: "traefik:v2.9.6"
+    image: "traefik:v2.9.9"
     # Note(decentral1se): *please do not* add any additional ports here.
     # Doing so could break new installs with port conflicts. Please use
     # the usual `compose.$app.yml` approach for any additional ports
@@ -46,7 +46,7 @@ services:
         - "traefik.http.routers.${STACK_NAME}.tls.certresolver=${LETS_ENCRYPT_ENV}"
         - "traefik.http.routers.${STACK_NAME}.service=api@internal"
         - "traefik.http.routers.${STACK_NAME}.middlewares=security@file"
-        - "coop-cloud.${STACK_NAME}.version=2.0.4+v2.9.6"
+        - "coop-cloud.${STACK_NAME}.version=2.1.0+v2.9.9"
 
 networks:
   proxy: