Add monica deployment

Added basic monica docker deployment.

A key which is required for monica is automatically generated on
deployment.
Optionally, geolocation and weather api can be enabled.
Mail-sending functionality is disabled by default but can be enabled
with any compatible smtp server set up.

roles/monica/README.md

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+# monica
+
+A minimalist rss feed reader.
+Deployed in a docker swarm with caddy.
+
+## Defaults
+
+```
+monica_upstream_file_dir: "{{ docker_stack_files_dir }}/{{ stack_name }}"
+```
+
+The on-target directory where the proxy configuration file should be stashed.
+
+```
+monica_use_https: true
+```
+
+Whether the service should be reachable through http (port 80) or through https (port 443) and provision an https certificate. Usually you will want this to stay `true`.
+
+```
+monica_version: latest
+```
+
+The docker image version to be used in stack creation.
+
+```
+subdomain_alias: prm
+```
+
+If the deployed container should be served over a uri that is not the stack name. 
+By default, it will be set to `prm.yourdomain.com` (personal relationship manager) - 
+if this option is not set it will be served on `monica.yourdomain.com` instead.
+
+```
+monica_db_root_password: mysupersecretdbrootpass
+monica_db_username: mymonicadbusername
+monica_db_password: mymonicadbpassword
+```
+
+Set the default username and password combination on first container start.
+If loading from an existing volume this does nothing, otherwise it sets the 
+first user so you can instantly log in.
+
+```
+monica_app_disable_signups: true
+```
+
+Sets the behavior on the login screen --- 
+if set to true (default) will not let anyone but the first user sign up,
+who automatically becomes an administrative user.
+If set to false will allow multiple users to sign up on the instance.
+
+```
+monica_app_geolocation_api_key: <your-locationiq-key>
+monica_app_weather_api_key: <your-darksky-key>
+```
+
+If `monica_app_geolocation_api_key` is set, Monica will translate addresses
+input into the app to geographical latitude/ longitude data.
+It requires an api key from https://locationiq.com/, which are free for 
+10.000 daily requests.
+
+Similarly, if `monica_app_weather_api_key` is set, monica will (afaik) show 
+weather data for the location of individual contacts. 
+It requires an API key from https://darksky.net/dev/register, where
+1.000 daily requests are free. 
+Be aware, however, that since darksky's sale to Apple, no new API signups are possible.
+To use this feature, `monica_app_geolocation_api_key` must also be filled out.
+
+```
+monica_mail_host: smtp.eu.mailgun.org
+monica_mail_port: 465
+monica_mail_encryption: tls
+monica_mail_username: 
+monica_mail_password: 
+monica_mail_from: monica@yourserver.com
+monica_mail_from_name: Monica
+monica_mail_new_user_notification_address: "{{ caddy_email }}"
+```
+
+Sets up the necessary details for Monica to send out registration and reminder e-mails.
+Requires an smtp server set up, most easily doable through things like mailgun or sendgrid.
+Variables should be relatively self-explanatory,
+with `monica_mail_new_user_notification_address` being the address the notifications should be sent *to*,
+so in all probability some sort of administration address.

roles/monica/defaults/main.yml

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+---
+
+monica_version: latest
+
+monica_upstream_file_dir: "{{ docker_stack_files_dir }}/{{ stack_name }}"
+
+monica_use_https: true
+
+# the subdomain link monica will be reachable under
+subdomain_alias: prm
+
+monica_app_disable_signups: true
+
+monica_db_root_password: mysupersecretdbrootpass
+monica_db_username: mymonicadbusername
+monica_db_password: mymonicadbpassword
+
+#monica_app_geolocation_api_key:
+#monica_app_weather_api_key:
+
+#monica_mail_host: smtp.eu.mailgun.org
+#monica_mail_username: 
+#monica_mail_password: 
+monica_mail_port: 465
+monica_mail_encryption: tls
+#monica_mail_from: monica@yourserver.com
+monica_mail_from_name: Monica
+monica_mail_new_user_notification_address: "{{ caddy_email }}"

roles/monica/handlers/main.yml

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+## Register reverse proxy
+- name: Ensure upstream directory exists
+  ansible.builtin.file:
+    path: "{{ monica_upstream_file_dir }}"
+    state: directory
+    mode: '0755'
+  become: yes
+  listen: "update monica upstream"
+
+- name: Update upstream template
+  ansible.builtin.template:
+    src: upstream.json.j2
+    dest: "{{ monica_upstream_file_dir }}/upstream.json"
+  become: yes
+  listen: "update monica upstream"
+
+# figure out if upstream id exists
+- name: check {{ stack_name }} upstream
+  community.docker.docker_container_exec:
+    container: "{{ caddy_container_id }}"
+    command: >
+      curl localhost:2019/id/{{ stack_name }}_upstream/
+  changed_when: False
+  register: result
+  become: yes
+  listen: "update monica upstream"
+
+# upstream already exists, patch it
+- name: remove old {{ stack_name }} upstream
+  community.docker.docker_container_exec:
+    container: "{{ caddy_container_id }}"
+    command: >
+      curl -X DELETE localhost:2019/id/{{ stack_name }}_upstream/
+  become: yes
+  when: (result.stdout | from_json)['error'] is not defined
+  listen: "update monica upstream"
+
+# upstream has to be created
+- name: add {{ stack_name }} upstream
+  community.docker.docker_container_exec:
+    container: "{{ caddy_container_id }}"
+    command: >
+      curl -X POST -H "Content-Type: application/json" -d @{{ monica_upstream_file_dir }}/upstream.json localhost:2019/config/apps/http/servers/{{ (monica_use_https == True) | ternary(caddy_https_server_name, caddy_http_server_name) }}/routes/0/ 
+  become: yes
+  listen: "update monica upstream"
+
+- name: Ensure upstream directory is gone again
+  ansible.builtin.file:
+    path: "{{ monica_upstream_file_dir }}"
+    state: absent
+  become: yes
+  listen: "update monica upstream"
+

roles/monica/meta/main.yml

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+---
+
+galaxy_info:
+  author: Marty Oehme
+  description: Installs monica as a docker stack service
+  license: GPL-3.0-only
+  min_ansible_version: 2.9
+  galaxy_tags: []
+
+
+dependencies:
+  - docker
+  - docker-swarm
+  - caddy

roles/monica/tasks/Ubuntu.yml

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+---
+## install requisites
+- name: Ensure openssl installed
+  ansible.builtin.package:
+    name: "openssl"
+    state: present
+  become: yes
+  tags:
+    - apt
+    - download
+    - packages
+

roles/monica/tasks/main.yml

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+---
+- name: "Select tasks for {{ ansible_distribution }} {{ ansible_distribution_major_version }}"
+  include_tasks: "{{ distribution }}"
+  with_first_found:
+    - "{{ ansible_distribution }}-{{ ansible_distribution_major_version }}.yml"
+    - "{{ ansible_distribution }}.yml"
+    - "{{ ansible_os_family }}.yml"
+  loop_control:
+    loop_var: distribution
+
+- name: Generate key
+  ansible.builtin.shell: echo -n 'base64:'; openssl rand -base64 32
+  register: monica_app_key
+
+- set_fact: 
+    monica_app_key={{ monica_app_key.stdout }}
+
+## install container
+- name: Check upstream status
+  community.docker.docker_container_exec:
+    container: "{{ caddy_container_id }}"
+    command: >
+      curl localhost:2019/id/{{ stack_name }}_upstream/
+  register: result
+  changed_when: (result.stdout | from_json) != (lookup('template', 'upstream.json.j2') | from_yaml)
+  become: yes
+  notify: "update monica upstream"
+
+- name: Deploy to swarm
+  community.general.docker_stack:
+    name: "{{ stack_name }}"
+    state: present
+    prune: yes
+    compose:
+      - "{{ stack_compose }}"
+  become: yes
+  tags:
+    - docker-swarm
+  notify: "update monica upstream"
+

roles/monica/templates/docker-stack.yml.j2

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+version: '3.7'
+
+services:
+  app:
+    image: {{ stack_image }}:{{ monica_version }}
+    networks:
+      - "{{ docker_swarm_public_network_name }}"
+      - backend
+    volumes:
+      - data:/var/www/html/storage
+    environment:
+{% if server_domain is not undefined and not none %}   
+      - APP_ENV=production
+{% else %}
+      - APP_ENV=local
+{% endif %}
+      - APP_KEY={{ monica_app_key }}
+{% if monica_app_disable_signups is sameas true %}
+      - APP_DISABLE_SIGNUP=true
+{% endif %}
+      - DB_HOST=db
+      - DB_DATABASE={{ monica_db_database }}
+      - DB_USERNAME={{ monica_db_username }}
+      - DB_PASSWORD={{ monica_db_password }}
+{% if server_domain is not undefined and not none %}   
+      - "APP_URL={{ (monica_use_https == True) | ternary('https', 'http') }}://{{ (subdomain_alias is not undefined and not none) | ternary(subdomain_alias, stack_name) }}.{{server_domain}}"
+{% if monica_app_geolocation_api_key is not undefined and not none %}
+      - ENABLE_GEOLOCATION=true
+      - LOCATION_IQ_API_KEY={{ monica_app_geolocation_api_key }}
+{% if monica_app_weather_api_key is not undefined and not none %}   
+      - ENABLE_WEATHER=true
+      - DARKSKY_API_KEY={{ monica_app_weather_api_key }}
+{% endif %}
+{% endif %}
+{% if monica_mail_host is not undefined and not none %}   
+      - MAIL_MAILER=smtp
+      - MAIL_HOST={{ monica_mail_host }}
+      - MAIL_PORT={{ monica_mail_port }}
+      - MAIL_ENCRYPTION={{ monica_mail_encryption }}
+      - MAIL_USERNAME={{ monica_mail_username }}
+      - MAIL_PASSWORD={{ monica_mail_password }}
+      - MAIL_FROM_ADDRESS={{ monica_mail_from }}
+      - MAIL_FROM_NAME="{{ monica_mail_from_name }}"
+      - APP_EMAIL_NEW_USERS_NOTIFICATION={{ monica_mail_new_user_notification_address }}
+{% endif %}
+{% else %}
+      - "APP_URL={{ (monica_use_https == True) | ternary('https', 'http') }}://localhost/{{ (subdomain_alias is not undefined and not none) | ternary(subdomain_alias, stack_name) }}/"
+      - APP_FORCE_URL=true
+{% endif %}
+
+  db:
+    image: mariadb:10
+    environment:
+      - MYSQL_ROOT_PASSWORD={{ monica_db_root_password }}
+      - MYSQL_DATABASE={{ monica_db_database }}
+      - MYSQL_USER={{ monica_db_username }}
+      - MYSQL_PASSWORD={{ monica_db_password }}
+    networks:
+      - backend
+    volumes:
+      - db:/var/lib/mysql
+
+volumes:
+  data:
+  db:
+
+networks:
+  "{{ docker_swarm_public_network_name }}":
+    external: true
+  backend:

roles/monica/templates/upstream.json.j2

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+{
+    "@id": "{{ stack_name }}_upstream",
+{% if server_domain is not undefined and not none %}   
+    "match": [
+        {
+            "host": [
+{% if subdomain_alias is not undefined and not none %}
+                "{{ subdomain_alias }}.{{ server_domain }}"
+{% else %}
+                "{{ stack_name }}.{{ server_domain }}"
+{% endif %}
+            ]
+        }
+    ],
+{% else %}
+    "match": [
+        {
+            "path": [
+{% if subdomain_alias is not undefined and not none %}
+                "/{{ subdomain_alias }}*"
+{% else %}
+                "/{{ stack_name }}*"
+{% endif %}
+            ]
+        }
+    ],
+{% endif %}
+    "handle": [
+        {
+            "handler": "reverse_proxy",
+            "upstreams": [
+                {
+                    "dial": "{{ stack_name }}_app:80"
+                }
+            ]
+        }
+    ]
+}

roles/monica/vars/main.yml

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+---
+
+stack_name: monica
+
+stack_image: "monica"
+
+stack_compose: "{{ lookup('template', 'docker-stack.yml.j2') | from_yaml }}"
+
+monica_db_database: monicadb