Add basic shaarli deployment

roles/shaarli/README.md

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+# shaarli
+
+A simple and fast bookmark manager.
+Can be deployed in minutes and takes minimum amount of resources.
+
+Be aware that shaarli installations can *not* be fully automated.
+That means after running this ansible role you will still have to setup up the first run wizard and create a user and so forth
+(if not running with an existing data-store).
+Do this quickly after setup,
+*especially* if your instance is public-facing!
+{: .alert .alert-warning}
+
+## Defaults
+
+```
+shaarli_upstream_file_dir: "{{ docker_stack_files_dir }}/{{ stack_name }}"
+```
+
+The on-target directory where the proxy configuration file should be stashed.
+
+```
+shaarli_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`.
+
+```
+shaarli_version: latest
+```
+
+The docker image version to be used in stack creation.
+
+```
+subdomain_alias: links
+```
+
+If the deployed container should be served over a uri that is not the stack name. 
+By default, it will be set to `links.yourdomain.com` - 
+if this option is not set it will be served on `shaarli.yourdomain.com` instead.
+

roles/shaarli/defaults/main.yml

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+---
+
+shaarli_version: latest
+
+shaarli_upstream_file_dir: "{{ docker_stack_files_dir }}/{{ stack_name }}"
+
+shaarli_use_https: true
+
+# the subdomain link shaarli will be reachable under
+subdomain_alias: links

roles/shaarli/handlers/main.yml

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+## Register reverse proxy
+- name: Ensure upstream directory exists
+  ansible.builtin.file:
+    path: "{{ shaarli_upstream_file_dir }}"
+    state: directory
+    mode: '0755'
+  become: yes
+  listen: "update shaarli upstream"
+
+- name: Update upstream template
+  ansible.builtin.template:
+    src: upstream.json.j2
+    dest: "{{ shaarli_upstream_file_dir }}/upstream.json"
+  become: yes
+  listen: "update shaarli 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 shaarli 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 shaarli 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 @{{ shaarli_upstream_file_dir }}/upstream.json localhost:2019/config/apps/http/servers/{{ (shaarli_use_https == True) | ternary(caddy_https_server_name, caddy_http_server_name) }}/routes/0/ 
+  become: yes
+  listen: "update shaarli upstream"
+
+- name: Ensure upstream directory is gone again
+  ansible.builtin.file:
+    path: "{{ shaarli_upstream_file_dir }}"
+    state: absent
+  become: yes
+  listen: "update shaarli upstream"
+

roles/shaarli/meta/main.yml

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

roles/shaarli/tasks/main.yml

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+---
+## install shaarli 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 shaarli upstream"
+
+- name: Deploy shaarli to swarm
+  community.general.docker_stack:
+    name: "{{ stack_name }}"
+    state: present
+    prune: yes
+    compose:
+      - "{{ stack_compose }}"
+  become: yes
+  tags:
+    - docker-swarm
+  notify: "update shaarli upstream"
+

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

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+version: '3.4'
+
+services:
+  app:
+    image: "{{ stack_image }}:{{ shaarli_version }}"
+    healthcheck:
+      test: ["CMD", "wget", "--quiet", "--spider", "--tries=1", "http://localhost:80"]
+      interval: 1m
+      timeout: 10s
+      retries: 3
+      start_period: 1m
+    networks:
+      - "{{ docker_swarm_public_network_name }}"
+    volumes:
+    - data:/var/www/shaarli/data
+    - cache:/var/www/shaarli/cache
+
+volumes:
+  data:
+  cache:
+
+networks:
+  "{{ docker_swarm_public_network_name }}":
+    external: true
+

roles/shaarli/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/shaarli/vars/main.yml

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