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LibrePortal/containers/matrix/docker-compose.yml
librelad b9e334dc49 matrix: add Synapse + Element as a federated chat app 
Synapse on Postgres plus the Element web client, on two subdomains: the
homeserver on matrix.<domain> (which becomes server_name, so IDs read
@alice:matrix.<domain>) and Element on element.<domain>.

Two hosts rather than one because server_name then matches the host Traefik
already terminates TLS for, so 'serve_server_wellknown: true' is all the
federation delegation needed and nothing has to be published at the apex
domain — which this app has no way to configure.

CFG_MATRIX_AUTHELIA is pinned false and documented: forward-auth in front of
/_matrix locks out every client and every federating peer, since they carry
Matrix access tokens and cannot follow a redirect. Real SSO goes through the
OIDC block in resources/homeserver.yaml instead.

The install hook generates the signing key once via upstream's own 'generate'
command and refuses to regenerate it over an existing install — a new key would
be rejected by every server that had cached the old one.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-08-18 05:28:31 +01:00

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networks:
DOCKER_NETWORK_DATA: #LIBREPORTAL|DOCKER_NETWORK_TAG|DOCKER_NETWORK_DATA
external: true
services:
# Synapse — the homeserver. Everything that matters lives in
# ./data/homeserver.yaml, written by matrix_install_post_compose from
# resources/homeserver.yaml; Synapse takes no meaningful configuration from
# the environment, so there is little to see here.
matrix-synapse: #LIBREPORTAL|SERVICE_TAG_1|matrix-synapse
container_name: matrix-synapse
image: matrixdotorg/synapse:v1.158.0 #LIBREPORTAL|MATRIX_VERSION_TAG|v1.158.0
# Synapse writes the media store, and under rootless Docker the image's
# own uid maps to a host sub-UID that owns nothing. Same fix as the
# other apps: run as whoever owns the bind mounts.
user: "USER_DATA" #LIBREPORTAL|USER_TAG|USER_DATA
restart: unless-stopped
# GLUETUN_OFF_BEGIN
ports:
- "PORTS_DATA_1" #LIBREPORTAL|PORTS_TAG_1|PORTS_DATA_1
# GLUETUN_OFF_END
volumes:
- ./data:/data
environment:
- TZ=TIMEZONE_DATA #LIBREPORTAL|TIMEZONE_TAG|TIMEZONE_DATA
- SYNAPSE_CONFIG_PATH=/data/homeserver.yaml
depends_on:
- matrix-postgres
labels:
libreportal.category: "CATEGORY_DATA" #LIBREPORTAL|CATEGORY_TAG|CATEGORY_DATA
libreportal.title: "TITLE_DATA" #LIBREPORTAL|TITLE_TAG|TITLE_DATA
libreportal.backup.db: "postgres:matrix-postgres:postgres:"
# The media store holds every uploaded file and avatar. It is not in
# the database, so without this it would not come back on restore.
libreportal.backup.files: "matrix-synapse:/data/media_store:data/media_store"
traefik.enable: TRAEFIK_ENABLE_DATA #LIBREPORTAL|TRAEFIK_ENABLE_TAG|TRAEFIK_ENABLE_DATA
# TRAEFIK_PORT_1_BEGIN
traefik.http.routers.matrix-synapse.entrypoints: web,websecure
traefik.http.routers.matrix-synapse.rule: Host(`DOMAINSUBNAME_DATA_1`) #LIBREPORTAL|DOMAINSUBNAME_TAG_1|DOMAINSUBNAME_DATA_1
traefik.http.routers.matrix-synapse.tls: true
traefik.http.routers.matrix-synapse.tls.certresolver: production
traefik.http.services.matrix-synapse.loadbalancer.server.port: PORT_INTERNAL_DATA_1 #LIBREPORTAL|PORT_INTERNAL_TAG_1|PORT_INTERNAL_DATA_1
traefik.http.routers.matrix-synapse.middlewares: MIDDLEWARE_DATA_1 #LIBREPORTAL|MIDDLEWARE_TAG_1|MIDDLEWARE_DATA_1
# TRAEFIK_PORT_1_END
traefik.docker.network: DOCKER_NETWORK_DATA #LIBREPORTAL|DOCKER_NETWORK_TAG|DOCKER_NETWORK_DATA
healthcheck:
disable: HEALTHCHECK_DATA #LIBREPORTAL|HEALTHCHECK_TAG|HEALTHCHECK_DATA
# GLUETUN_OFF_BEGIN
networks:
DOCKER_NETWORK_DATA: #LIBREPORTAL|DOCKER_NETWORK_TAG|DOCKER_NETWORK_DATA
ipv4_address: IP_DATA_1 #LIBREPORTAL|IP_TAG_1|IP_DATA_1
# GLUETUN_OFF_END
# GLUETUN_ON_BEGIN
# network_mode: "container:gluetun-service"
# GLUETUN_ON_END
# Element web — a static single-page app served by nginx. It talks to
# Synapse from the user's browser, not server-side, so it needs no link to
# the homeserver container beyond the base_url baked into config.json.
matrix-element: #LIBREPORTAL|SERVICE_TAG_2|matrix-element
container_name: matrix-element
image: vectorim/element-web:v1.12.25 #LIBREPORTAL|MATRIX_ELEMENT_VERSION_TAG|v1.12.25
restart: unless-stopped
# GLUETUN_OFF_BEGIN
ports:
- "PORTS_DATA_2" #LIBREPORTAL|PORTS_TAG_2|PORTS_DATA_2
# GLUETUN_OFF_END
volumes:
- ./element/config.json:/app/config.json:ro
environment:
- TZ=TIMEZONE_DATA #LIBREPORTAL|TIMEZONE_TAG|TIMEZONE_DATA
labels:
libreportal.category: "CATEGORY_DATA" #LIBREPORTAL|CATEGORY_TAG|CATEGORY_DATA
libreportal.title: "TITLE_DATA" #LIBREPORTAL|TITLE_TAG|TITLE_DATA
traefik.enable: TRAEFIK_ENABLE_DATA #LIBREPORTAL|TRAEFIK_ENABLE_TAG|TRAEFIK_ENABLE_DATA
# TRAEFIK_PORT_2_BEGIN
traefik.http.routers.matrix-element.entrypoints: web,websecure
traefik.http.routers.matrix-element.rule: Host(`DOMAINSUBNAME_DATA_2`) #LIBREPORTAL|DOMAINSUBNAME_TAG_2|DOMAINSUBNAME_DATA_2
traefik.http.routers.matrix-element.tls: true
traefik.http.routers.matrix-element.tls.certresolver: production
traefik.http.services.matrix-element.loadbalancer.server.port: PORT_INTERNAL_DATA_2 #LIBREPORTAL|PORT_INTERNAL_TAG_2|PORT_INTERNAL_DATA_2
traefik.http.routers.matrix-element.middlewares: MIDDLEWARE_DATA_2 #LIBREPORTAL|MIDDLEWARE_TAG_2|MIDDLEWARE_DATA_2
# TRAEFIK_PORT_2_END
traefik.docker.network: DOCKER_NETWORK_DATA #LIBREPORTAL|DOCKER_NETWORK_TAG|DOCKER_NETWORK_DATA
healthcheck:
disable: HEALTHCHECK_DATA #LIBREPORTAL|HEALTHCHECK_TAG|HEALTHCHECK_DATA
# GLUETUN_OFF_BEGIN
networks:
DOCKER_NETWORK_DATA: #LIBREPORTAL|DOCKER_NETWORK_TAG|DOCKER_NETWORK_DATA
ipv4_address: IP_DATA_2 #LIBREPORTAL|IP_TAG_2|IP_DATA_2
# GLUETUN_OFF_END
# GLUETUN_ON_BEGIN
# network_mode: "container:gluetun-service"
# GLUETUN_ON_END
# No `user:` override — the postgres entrypoint starts as root, chowns
# PGDATA and drops privileges, which works under rootless because
# container-root is the install user that owns the mount.
matrix-postgres:
image: postgres:15-alpine
container_name: matrix-postgres
restart: unless-stopped
environment:
- TZ=TIMEZONE_DATA #LIBREPORTAL|TIMEZONE_TAG|TIMEZONE_DATA
- POSTGRES_USER=synapse
- POSTGRES_PASSWORD=PASSWORD_DATA_1 #LIBREPORTAL|PASSWORD_TAG_1|PASSWORD_DATA_1
- POSTGRES_DB=synapse
# Not optional. Synapse refuses to start against a database with any
# other collation or ctype — it needs deterministic byte ordering for
# its indexes, and a C.UTF-8 locale is the only thing that gives it.
- POSTGRES_INITDB_ARGS=--encoding=UTF8 --locale=C
volumes:
- ./postgres:/var/lib/postgresql/data
networks:
DOCKER_NETWORK_DATA: #LIBREPORTAL|DOCKER_NETWORK_TAG|DOCKER_NETWORK_DATA
ipv4_address: IP_DATA_3 #LIBREPORTAL|IP_TAG_3|IP_DATA_3
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