Add CouchDB and livesync-bridge for Obsidian LiveSync

CouchDB is served at livesync.${DOMAIN} via Traefik without a middleware
chain, since CouchDB handles CORS itself. livesync-bridge mirrors the
vault to ~/repo/notes, and notes-autocommit.sh pushes it from cron.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docker-compose.yml

@@ -30,6 +30,10 @@ secrets:
     file: $SECRETSDIR/carconnect_grafana_pw
   home_assistant_token_spoolman:
     file: $SECRETSDIR/home_assistant_token_spoolman
+  couchdb_password:
+    file: $SECRETSDIR/couchdb_password
+  livesync_bridge_config:
+    file: $SECRETSDIR/livesync_bridge_config.json
 
 
 include:
@@ -909,6 +913,56 @@ services:
       - "traefik.http.routers.carconnect-grafana.tls.certresolver=milvert_dns"
       - "traefik.http.routers.carconnect-grafana.tls=true"
 
+  couchdb:
+    image: couchdb:3.5
+    container_name: couchdb
+    restart: unless-stopped
+    entrypoint: ["/bin/sh", "/couchdb-entrypoint.sh"]
+    networks:
+      - backend
+    environment:
+      - TZ=${TZ}
+      - COUCHDB_USER=obsidian
+    secrets:
+      - couchdb_password
+    volumes:
+      - ${DIR_LOCAL}/couchdb/data:/opt/couchdb/data
+      - ./obsidian-livesync/couchdb-entrypoint.sh:/couchdb-entrypoint.sh:ro
+      - ./obsidian-livesync/livesync.ini:/livesync.ini:ro
+    labels:
+      - diun.enable=true
+      # No middleware chain: CouchDB handles CORS itself, and chain-no-auth's
+      # secure-headers (GET/OPTIONS/PUT only) and rate limit break LiveSync.
+      - "traefik.enable=true"
+      - "traefik.http.services.livesync-service.loadbalancer.server.port=5984"
+      - "traefik.http.routers.livesync-secure.entrypoints=web-secure"
+      - "traefik.http.routers.livesync-secure.rule=Host(`livesync.${DOMAIN}`)"
+      - "traefik.http.routers.livesync-secure.tls.certresolver=milvert_dns"
+      - "traefik.http.routers.livesync-secure.tls=true"
+
+  # Mirrors the CouchDB vault to ~/repo/notes as markdown.
+  # No published image, so it is built from a pinned commit.
+  livesync-bridge:
+    build: https://github.com/vrtmrz/livesync-bridge.git#fc0e028d33b3a12ddee1322951375e05107edc55
+    image: livesync-bridge:fc0e028
+    container_name: livesync-bridge
+    restart: unless-stopped
+    user: "${UID}:${GID}"
+    depends_on:
+      - couchdb
+    networks:
+      - backend
+    environment:
+      - TZ=${TZ}
+      - LSB_CONFIG=/run/secrets/livesync_bridge_config
+    secrets:
+      - livesync_bridge_config
+    volumes:
+      - /home/simon/repo/notes:/app/data/vault
+      - ${DIR_LOCAL}/livesync-bridge:/deno-dir/location_data
+    labels:
+      - "traefik.enable=false"
+
 networks:
   frontend:
     external: true

obsidian-livesync/couchdb-entrypoint.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+# Reads the admin password from the Docker secret and installs the LiveSync
+# settings before handing over to the image's own entrypoint.
+set -e
+
+export COUCHDB_PASSWORD="$(cat /run/secrets/couchdb_password)"
+cp /livesync.ini /opt/couchdb/etc/local.d/10-livesync.ini
+
+exec tini -- /docker-entrypoint.sh /opt/couchdb/bin/couchdb

obsidian-livesync/livesync.ini

@@ -0,0 +1,26 @@
+; CouchDB settings required by Obsidian Self-hosted LiveSync.
+; Values follow obsidian-livesync docker/scripts/couchdb-init.sh.
+
+[couchdb]
+single_node = true
+max_document_size = 50000000
+
+[chttpd]
+require_valid_user = true
+max_http_request_size = 4294967296
+enable_cors = true
+
+[chttpd_auth]
+require_valid_user = true
+authentication_redirect = /_utils/session.html
+
+[httpd]
+WWW-Authenticate = Basic realm="couchdb"
+enable_cors = true
+
+[cors]
+origins = app://obsidian.md,capacitor://localhost,http://localhost
+credentials = true
+headers = accept, authorization, content-type, origin, referer
+methods = GET, PUT, POST, HEAD, DELETE
+max_age = 3600

obsidian-livesync/notes-autocommit.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+# Commits and pushes the LiveSync-mirrored notes repo. Run from cron.
+set -eu
+
+REPO=/home/simon/repo/notes
+
+# Skip this run if the previous one is still going.
+exec 9>/tmp/notes-autocommit.lock
+flock -n 9 || exit 0
+
+cd "$REPO"
+git add -A
+git diff --cached --quiet && exit 0
+git commit -q -m "Autocommit $(date '+%Y-%m-%d %H:%M')"
+git push -q origin main