Add the Overleaf playbook

overleaf/roles/nginx/handlers/main.yaml

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+---
+# Handlers for Nginx role
+- name: Reload Nginx
+  service:
+    name: nginx
+    state: reloaded

overleaf/roles/nginx/tasks/main.yaml

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+---
+# Tasks for Nginx role
+- name: Check if Nginx conf file exists
+  stat:
+    path: "/etc/nginx/sites-available/{{ http_conf }}"
+  register: status
+
+- name: No need to reload Nginx
+  debug:
+    msg: "No need to reload Nginx as sites-available entries have already been created"
+
+- name: Set Nginx conf file
+  when: status.stat.exists == false
+  template:
+    src: "files/nginx.conf.j2"
+    dest: "/etc/nginx/sites-available/{{ http_conf }}"
+
+- name: Enable new site
+  when: status.stat.exists == false
+  file:
+    src: "/etc/nginx/sites-available/{{ http_conf }}"
+    dest: "/etc/nginx/sites-enabled/{{ http_conf }}"
+    state: link
+  notify: Reload Nginx

overleaf/roles/sharelatex/tasks/main.yaml

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+---
+# Tasks for Sharelatex role
+- name: Pull Sharelatex image
+  docker_image:
+    name: "{{ sharelatex_image }}"
+    source: pull
+    force_source: yes
+
+- name: Ensure Overleaf Directory exists
+  file:
+      path: "/var/lib/{{ host_directory }}"
+      state: directory
+      mode: 0755
+
+- name: Create webserver container
+  docker_container:
+    name: "{{ sharelatex_container }}"
+    image: "{{ sharelatex_image }}"
+    state: started
+    restart_policy: "unless-stopped"
+    env:
+#       SHARELATEX_APP_NAME: Overleaf Community Edition
+#       SHARELATEX_MONGO_URL: mongodb://mongo/sharelatex
+      OVERLEAF_APP_NAME: Overleaf Community Edition
+      OVERLEAF_MONGO_URL: mongodb://mongo/sharelatex
+
+      # Same property, unfortunately with different names in
+      # different locations
+      OVERLEAF_REDIS_HOST: redis
+      REDIS_HOST: redis
+
+      ENABLED_LINKED_FILE_TYPES: 'project_file,project_output_file'
+
+      # Enables Thumbnail generation using ImageMagick
+      ENABLE_CONVERSIONS: 'true'
+
+      # Disables email confirmation requirement
+      EMAIL_CONFIRMATION_DISABLED: 'true'
+
+      # temporary fix for LuaLaTex compiles
+      # see https://github.com/overleaf/overleaf/issues/695
+      TEXMFVAR: /var/lib/sharelatex/tmp/texmf-var
+    links:
+      - "{{ mongo_container }}:mongo"
+      - "{{ redis_container }}:redis"
+    published_ports:
+      - "127.0.0.1:{{ host_port }}:80"
+    volumes:
+      - "/var/lib/{{ host_directory }}:/var/lib/overleaf"
+#       - "/var/lib/{{ host_directory }}:/var/lib/sharelatex"