feat(nextcloud): enable custom Alpine-based Whiteboard image with Chromium & ffmpeg support

- Added role tasks to deploy templated Dockerfile for Whiteboard service
- Configured build context and custom image name (nextcloud_whiteboard_custom)
- Increased PID limits and shm_size for stable recording
- Adjusted user ID variable naming consistency
- Integrated path_join for service directory variables
- Fixed build permissions (install as root, revert to nobody)

Reference: ChatGPT conversation https://chatgpt.com/share/68f771c6-0e98-800f-99ca-9e367f4cd0c2

roles/web-app-nextcloud/config/main.yml

@@ -82,7 +82,7 @@ docker:
       cpus:                 "1.0"
       mem_reservation:      "256m"
       mem_limit:            "1g"
-      pids_limit:           512
+      pids_limit:           1024
     whiteboard:
       name:                 "nextcloud-whiteboard"
       image:                "ghcr.io/nextcloud-releases/whiteboard"
@@ -92,7 +92,7 @@ docker:
       cpus:                 "0.25"
       mem_reservation:      "128m"
       mem_limit:            "512m"
-      pids_limit:           256
+      pids_limit:           1024
   enabled:  "{{ applications | get_app_conf('web-app-nextcloud', 'features.oidc', False, True, True) }}"   # Activate OIDC for Nextcloud
   # floavor decides which OICD plugin should be used. 
   # Available options: oidc_login, sociallogin

roles/web-app-nextcloud/tasks/01_fullstack.yml

@@ -14,6 +14,21 @@
   vars:
     docker_compose_flush_handlers: false
 
+- block:
+    - name: "Create '{{ NEXTCLOUD_WHITEBOARD_SERVICE_DIRECTORY }}' Directory"
+      file:
+        path: "{{ NEXTCLOUD_WHITEBOARD_SERVICE_DIRECTORY }}"
+        state: directory
+        mode: "0755"
+    
+    - name: "Deploy Whiteboard Dockerfile to '{{ NEXTCLOUD_WHITEBOARD_SERVICE_DOCKERFILE }}'"
+      template:
+        src:    "Dockerfiles/Whiteboard.j2"
+        dest:   "{{ NEXTCLOUD_WHITEBOARD_SERVICE_DOCKERFILE }}"
+      notify: docker compose build
+      
+  when: NEXTCLOUD_WHITEBOARD_ENABLED | bool
+
 - name: "create {{ NEXTCLOUD_HOST_CONF_ADD_PATH }}"
   file:
     path: "{{ NEXTCLOUD_HOST_CONF_ADD_PATH }}"
@@ -24,8 +39,8 @@
   template:
     src:    "{{ item }}"
     dest:   "{{ NEXTCLOUD_HOST_CONF_ADD_PATH }}/{{ item | basename | regex_replace('\\.j2$', '') }}"
-    owner:  "{{ NEXTCLOUD_DOCKER_USER_id }}"
+    owner:  "{{ NEXTCLOUD_DOCKER_USER_ID }}"
-    group:  "{{ NEXTCLOUD_DOCKER_USER_id }}"
+    group:  "{{ NEXTCLOUD_DOCKER_USER_ID }}"
   loop:     "{{ lookup('fileglob', role_path ~ '/templates/config/*.j2', wantlist=True) }}"
   notify: docker compose up
 

roles/web-app-nextcloud/templates/Dockerfiles/Whiteboard.j2

@@ -0,0 +1,27 @@
+FROM {{ NEXTCLOUD_WHITEBOARD_IMAGE }}:{{ NEXTCLOUD_WHITEBOARD_VERSION }}
+
+# Temporarily switch to root so we can install packages
+USER 0
+
+# Install Chromium, ffmpeg, fonts, and runtime libraries for headless operation on Alpine
+RUN apk add --no-cache \
+      chromium \
+      ffmpeg \
+      nss \
+      freetype \
+      harfbuzz \
+      ttf-dejavu \
+      ttf-liberation \
+      udev \
+      ca-certificates \
+    && update-ca-certificates
+
+# Ensure a consistent Chromium binary path
+RUN if [ -x /usr/bin/chromium-browser ]; then ln -sf /usr/bin/chromium-browser /usr/bin/chromium; fi
+
+# Environment variables used by Puppeteer
+ENV PUPPETEER_EXECUTABLE_PATH=/usr/bin/chromium \
+    PUPPETEER_SKIP_DOWNLOAD=true
+
+# Switch back to the original non-root user (nobody)
+USER 65534

roles/web-app-nextcloud/templates/docker-compose.yml.j2

@@ -67,8 +67,12 @@
   {{ service_name }}:
 {% set container_port = NEXTCLOUD_WHITEBOARD_PORT_INTERNAL %}
 {% include 'roles/docker-container/templates/base.yml.j2' %}
+    build:
+      context: .
+      dockerfile: {{ NEXTCLOUD_WHITEBOARD_SERVICE_DOCKERFILE }}
+    pull_policy: never
 {% include 'roles/docker-container/templates/healthcheck/nc.yml.j2' %}
-    image: "{{ NEXTCLOUD_WHITEBOARD_IMAGE }}:{{ NEXTCLOUD_WHITEBOARD_VERSION }}"
+    image: "{{ NEXTCLOUD_WHITEBOARD_CUSTOM_IMAGE }}"
     container_name: {{ NEXTCLOUD_WHITEBOARD_CONTAINER }}
     volumes:
       - whiteboard_tmp:/tmp
@@ -76,6 +80,7 @@
 
     expose:
       - "{{ container_port }}"
+    shm_size: 1g
     networks:
       default:
         ipv4_address: 192.168.102.71

roles/web-app-nextcloud/templates/env.j2

@@ -65,6 +65,4 @@ CHROMIUM_FLAGS=--headless=new --no-sandbox --disable-gpu --disable-dev-shm-usage
 # Falls das Image Chromium mitbringt – Pfad meistens /usr/bin/chromium oder /usr/bin/chromium-browser:
 PUPPETEER_EXECUTABLE_PATH=/usr/bin/chromium
 PUPPETEER_SKIP_DOWNLOAD=true
-# Deactivated @todo implement
-WHITEBOARD_ENABLE_RECORDING=false
 {% endif %}

roles/web-app-nextcloud/vars/main.yml

@@ -120,6 +120,7 @@ NEXTCLOUD_WHITEBOARD_SERVICE:             "whiteboard"
 NEXTCLOUD_WHITEBOARD_CONTAINER:           "{{ applications | get_app_conf(application_id, 'docker.services.' ~ NEXTCLOUD_WHITEBOARD_SERVICE ~'.name') }}"
 NEXTCLOUD_WHITEBOARD_IMAGE:               "{{ applications | get_app_conf(application_id, 'docker.services.' ~ NEXTCLOUD_WHITEBOARD_SERVICE ~'.image') }}"
 NEXTCLOUD_WHITEBOARD_VERSION:             "{{ applications | get_app_conf(application_id, 'docker.services.' ~ NEXTCLOUD_WHITEBOARD_SERVICE ~'.version') }}"
+NEXTCLOUD_WHITEBOARD_CUSTOM_IMAGE:        "nextcloud_whiteboard_custom"
 NEXTCLOUD_WHITEBOARD_ENABLED:             "{{ applications | get_app_conf(application_id, 'plugins.' ~ NEXTCLOUD_WHITEBOARD_SERVICE ~'.enabled') }}"
 NEXTCLOUD_WHITEBOARD_PORT_INTERNAL:       "3002"
 NEXTCLOUD_WHITEBOARD_JWT:                 "{{ applications | get_app_conf(application_id, 'credentials.' ~ NEXTCLOUD_WHITEBOARD_SERVICE ~'_jwt_secret') }}"
@@ -127,12 +128,14 @@ NEXTCLOUD_WHITEBOARD_LOCATION:            "/whiteboard/"
 NEXTCLOUD_WHITEBOARD_URL:                 "{{ [ NEXTCLOUD_URL, NEXTCLOUD_WHITEBOARD_LOCATION ] | url_join }}"
 NEXTCLOUD_WHITEBOARD_TMP_VOLUME:          "{{ applications | get_app_conf(application_id, 'docker.volumes.whiteboard_tmp') }}"
 NEXTCLOUD_WHITEBOARD_FRONTCACHE_VOLUME:   "{{ applications | get_app_conf(application_id, 'docker.volumes.whiteboard_fontcache') }}"
+NEXTCLOUD_WHITEBOARD_SERVICE_DIRECTORY:   "{{ [ docker_compose.directories.services, 'whiteboard' ] | path_join }}"
+NEXTCLOUD_WHITEBOARD_SERVICE_DOCKERFILE:  "{{ [ NEXTCLOUD_WHITEBOARD_SERVICE_DIRECTORY, 'Dockerfile' ] | path_join }}"
 
 ### Collabora
 NEXTCLOUD_COLLABORA_URL:                  "{{ domains | get_url('web-svc-collabora', WEB_PROTOCOL) }}"
 
 ## User Configuration
-NEXTCLOUD_DOCKER_USER_id:                 82         # UID of the www-data user
+NEXTCLOUD_DOCKER_USER_ID:                 82         # UID of the www-data user
 NEXTCLOUD_DOCKER_USER:                    "www-data" # Name of the www-data user (Set here to easy change it in the future)
 
 ## Execution