new:[n8n] add charm

n8n/README.org

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+# -*- ispell-local-dictionary: "english" -*-
+
+* Info 
+
+From: https://docs.n8n.io/hosting/installation/docker/#starting-n8n
+
+
+* Usage
+
+Config info: https://support.rallly.co/self-hosting/configuration-options
+
+Requires a =smtp-server= provider to be functional, you can use
+=smtp-stub= charm to provide information to externally managed =SMTP=.
+
+#+begin_src yaml
+n8n:
+ options:
+   sender-email: #the sender email (beware the conf of your SMTP server)
+
+smtp-stub:
+  options:
+    host: smtp.myhost.com
+    port: 465
+    connection-security: "ssl/tls"
+    auth-method: password #IMPORTANT: if not present login password doesn’t work
+    login: myuser
+    password: myp4ssw0rd
+#+end_src
+
+

n8n/hooks/init

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+#!/bin/bash
+
+## Init is run on host
+## For now it is run every time the script is launched, but
+## it should be launched only once after build.
+
+## Accessible variables are:
+## - SERVICE_NAME        Name of current service
+## - DOCKER_BASE_IMAGE   Base image from which this service might be built if any
+## - SERVICE_DATASTORE           Location on host of the DATASTORE of this service
+## - SERVICE_CONFIGSTORE         Location on host of the CONFIGSTORE of this service
+
+
+set -e
+
+sender=$(options-get sender-email) || exit 1
+
+init-config-add "
+$SERVICE_NAME:
+  volumes:
+    - $SERVICE_DATASTORE/.n8n:/home/node/.n8n
+  environment:
+    N8N_SMTP_SENDER: \"$sender\"
+    GENERIC_TIMEZONE: "Europe/Paris"
+    TZ: "Europe/Paris"
+"
+
+uid=$(docker_get_uid "$SERVICE_NAME" "node")
+mkdir -p "$SERVICE_DATASTORE/.n8n"
+chown "$uid" "$SERVICE_DATASTORE/.n8n"
+

n8n/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)"
+
+
+config-add "\
+services:
+  $MASTER_BASE_SERVICE_NAME:
+    environment:
+      DB_TYPE: postgresdb
+      DB_POSTGRESDB_HOST: $TARGET_SERVICE_NAME
+      DB_POSTGRESDB_PORT: 5432
+      DB_POSTGRESDB_DATABASE: $DBNAME
+      DB_POSTGRESDB_USER: $USER
+      DB_POSTGRESDB_PASSWORD: $PASSWORD
+"
+
+info "Configured $SERVICE_NAME code for $TARGET_SERVICE_NAME access."

n8n/hooks/smtp_server-relation-joined

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+#!/bin/bash
+
+set -e
+
+host=$(relation-get host) || exit 1
+port=$(relation-get port) || exit 1
+user=$(relation-get login) || exit 1
+password="$(relation-get password)" || exit 1
+
+
+config-add "\
+services:
+  $MASTER_BASE_SERVICE_NAME:
+    environment:
+      N8N_SMTP_USER: \"$user\"
+      N8N_SMTP_PASS: \"${password//\$/\$\$}\"
+      N8N_SMTP_HOST: \"$host\"
+      N8N_SMTP_PORT: \"$port\"
+"
+

n8n/metadata.yml

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+docker-image: docker.n8n.io/n8nio/n8n:1.23.0
+
+uses:
+  postgres-database:
+    #constraint: required | recommended | optional
+    #auto: pair | summon | none ## default: pair
+    constraint: required
+    auto: summon
+    solves:
+      database: "main storage"
+  smtp-server:
+    constraint: required
+    auto: summon
+    solves:
+      proxy: "Public access"
+  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}:5678
+  backup:
+    constraint: recommended
+    auto: pair
+    solves:
+      backup: "Automatic regular backup"
+    default-options: