new: [etherpad] new charm

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

etherpad/README.org

@@ -0,0 +1,25 @@
+# -*- ispell-local-dictionary: "english" -*-
+
+#+TITLE: Etherpad Charm
+
+* Upgrade
+
+Based on https://github.com/ether/etherpad-lite , following:
+
+https://github.com/ether/etherpad-lite/blob/develop/doc/docker.md
+
+Used:
+
+#+begin_src sh
+TAG=1.8.14
+git clone https://github.com/ether/etherpad-lite --depth 1 -b $TAG
+docker build --build-arg INSTALL_SOFFICE=1 . -t docker.0k.io/etherpad:${TAG}-soffice
+docker push docker.0k.io/etherpad:${TAG}-soffice
+#+end_src
+
+* Admin password
+
+We choose to NOT include admin panel as it allows to change settings
+and install plugins but this will not allow to reproduce an install
+easily. We can do this on the =compose.yml= side in a reproducible
+manner.

etherpad/hooks/postgres_database-relation-joined

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+#!/bin/bash
+
+set -e
+
+PASSWORD="$(relation-get password)"
+USER="$(relation-get user)"
+DBNAME="$(relation-get dbname)"
+
+control=$(echo -en "$USER\0$DBNAME\0$PASSWORD\0$ADMIN_PASSWORD" | md5_compat)
+
+config-add "\
+services:
+  $MASTER_BASE_SERVICE_NAME:
+    environment:
+      DB_TYPE: postgres
+      DB_HOST: \"$MASTER_TARGET_SERVICE_NAME\"
+      DB_NAME: \"$DBNAME\"
+      DB_PASS: \"$PASSWORD\"
+      DB_USER: \"$USER\"
+"
+
+[ "$control" == "$(relation-get control 2>/dev/null)" ] && exit 0
+
+relation-set control "$control"
+
+info "Configured $SERVICE_NAME code for $TARGET_SERVICE_NAME access."

etherpad/metadata.yml

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+name: etherpad
+summary: "Etherpad-lite server"
+maintainer: "Valentin Lab <valentin.lab@kalysto.org>"
+inherit: base-0k
+## Custom built from git 1.8.14 https://github.com/ether/etherpad-lite with
+## build arg --build-arg INSTALL_SOFFICE=1
+docker-image: docker.0k.io/etherpad:1.8.14-soffice  ## custom built from git m etherpad/etherpad
+description: |
+  Etherpad-lite service.
+
+docker-compose:
+  environment:
+    SOFFICE: '/usr/bin/soffice'
+
+uses:
+  postgres-database:
+    #constraint: required | recommended | optional
+    #auto: pair | summon | none ## default: pair
+    constraint: required
+    auto: summon
+    solves:
+      database: "main storage"
+    default-options:
+      extensions:
+        - unaccent
+  web-proxy:
+    #constraint: required | recommended | optional
+    #auto: pair | summon | none ## default: pair
+    constraint: recommended
+    auto: pair
+    solves:
+      proxy: "Public access"
+    default-options:
+      target: !var-expand ${MASTER_BASE_SERVICE_NAME}:9001