Docker Compose Worker Documentation and Examples (#12737)
James
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Add documentation for how to configure Synapse with Workers using Docker Compose. Includes example worker config and docker-compose.yaml. Contributed by @Thumbscrew.
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# Setting up Synapse with Workers using Docker Compose
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This directory describes how deploy and manage Synapse and workers via [Docker Compose](https://docs.docker.com/compose/).
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Example worker configuration files can be found [here](workers).
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All examples and snippets assume that your Synapse service is called `synapse` in your Docker Compose file.
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An example Docker Compose file can be found [here](docker-compose.yaml).
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## Worker Service Examples in Docker Compose
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In order to start the Synapse container as a worker, you must specify an `entrypoint` that loads both the `homeserver.yaml` and the configuration for the worker (`synapse-generic-worker-1.yaml` in the example below). You must also include the worker type in the environment variable `SYNAPSE_WORKER` or alternatively pass `-m synapse.app.generic_worker` as part of the `entrypoint` after `"/start.py", "run"`).
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### Generic Worker Example
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```yaml
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synapse-generic-worker-1:
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image: matrixdotorg/synapse:latest
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container_name: synapse-generic-worker-1
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restart: unless-stopped
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entrypoint: ["/start.py", "run", "--config-path=/data/homeserver.yaml", "--config-path=/data/workers/synapse-generic-worker-1.yaml"]
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healthcheck:
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test: ["CMD-SHELL", "curl -fSs http://localhost:8081/health || exit 1"]
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start_period: "5s"
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interval: "15s"
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timeout: "5s"
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volumes:
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- ${VOLUME_PATH}/data:/data:rw # Replace VOLUME_PATH with the path to your Synapse volume
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environment:
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SYNAPSE_WORKER: synapse.app.generic_worker
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# Expose port if required so your reverse proxy can send requests to this worker
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# Port configuration will depend on how the http listener is defined in the worker configuration file
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ports:
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- 8081:8081
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depends_on:
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- synapse
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```
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### Federation Sender Example
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Please note: The federation sender does not receive REST API calls so no exposed ports are required.
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```yaml
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synapse-federation-sender-1:
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image: matrixdotorg/synapse:latest
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container_name: synapse-federation-sender-1
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restart: unless-stopped
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entrypoint: ["/start.py", "run", "--config-path=/data/homeserver.yaml", "--config-path=/data/workers/synapse-federation-sender-1.yaml"]
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healthcheck:
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disable: true
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volumes:
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- ${VOLUME_PATH}/data:/data:rw # Replace VOLUME_PATH with the path to your Synapse volume
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environment:
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SYNAPSE_WORKER: synapse.app.federation_sender
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depends_on:
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- synapse
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```
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## `homeserver.yaml` Configuration
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### Enable Redis
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Locate the `redis` section of your `homeserver.yaml` and enable and configure it:
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```yaml
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redis:
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enabled: true
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host: redis
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port: 6379
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# password: <secret_password>
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```
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This assumes that your Redis service is called `redis` in your Docker Compose file.
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### Add a replication Listener
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Locate the `listeners` section of your `homeserver.yaml` and add the following replication listener:
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```yaml
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listeners:
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# Other listeners
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- port: 9093
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type: http
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resources:
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- names: [replication]
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```
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This listener is used by the workers for replication and is referred to in worker config files using the following settings:
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```yaml
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worker_replication_host: synapse
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worker_replication_http_port: 9093
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```
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### Add Workers to `instance_map`
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Locate the `instance_map` section of your `homeserver.yaml` and populate it with your workers:
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```yaml
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instance_map:
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synapse-generic-worker-1: # The worker_name setting in your worker configuration file
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host: synapse-generic-worker-1 # The name of the worker service in your Docker Compose file
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port: 8034 # The port assigned to the replication listener in your worker config file
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synapse-federation-sender-1:
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host: synapse-federation-sender-1
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port: 8034
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```
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### Configure Federation Senders
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This section is applicable if you are using Federation senders (synapse.app.federation_sender). Locate the `send_federation` and `federation_sender_instances` settings in your `homeserver.yaml` and configure them:
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```yaml
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# This will disable federation sending on the main Synapse instance
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send_federation: false
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federation_sender_instances:
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- synapse-federation-sender-1 # The worker_name setting in your federation sender worker configuration file
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```
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## Other Worker types
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Using the concepts shown here it is possible to create other worker types in Docker Compose. See the [Workers](https://matrix-org.github.io/synapse/latest/workers.html#available-worker-applications) documentation for a list of available workers.
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networks:
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backend:
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services:
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postgres:
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image: postgres:latest
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restart: unless-stopped
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volumes:
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- ${VOLUME_PATH}/var/lib/postgresql/data:/var/lib/postgresql/data:rw
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networks:
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- backend
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environment:
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POSTGRES_DB: synapse
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POSTGRES_USER: synapse_user
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POSTGRES_PASSWORD: postgres
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POSTGRES_INITDB_ARGS: --encoding=UTF8 --locale=C
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redis:
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image: redis:latest
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restart: unless-stopped
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networks:
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- backend
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synapse:
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image: matrixdotorg/synapse:latest
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container_name: synapse
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restart: unless-stopped
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volumes:
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- ${VOLUME_PATH}/data:/data:rw
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ports:
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- 8008:8008
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networks:
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- backend
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environment:
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SYNAPSE_CONFIG_DIR: /data
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SYNAPSE_CONFIG_PATH: /data/homeserver.yaml
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depends_on:
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- postgres
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synapse-generic-worker-1:
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image: matrixdotorg/synapse:latest
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container_name: synapse-generic-worker-1
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restart: unless-stopped
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entrypoint: ["/start.py", "run", "--config-path=/data/homeserver.yaml", "--config-path=/data/workers/synapse-generic-worker-1.yaml"]
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healthcheck:
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test: ["CMD-SHELL", "curl -fSs http://localhost:8081/health || exit 1"]
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start_period: "5s"
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interval: "15s"
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timeout: "5s"
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networks:
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- backend
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volumes:
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- ${VOLUME_PATH}/data:/data:rw # Replace VOLUME_PATH with the path to your Synapse volume
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environment:
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SYNAPSE_WORKER: synapse.app.generic_worker
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# Expose port if required so your reverse proxy can send requests to this worker
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# Port configuration will depend on how the http listener is defined in the worker configuration file
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ports:
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- 8081:8081
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depends_on:
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- synapse
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synapse-federation-sender-1:
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image: matrixdotorg/synapse:latest
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container_name: synapse-federation-sender-1
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restart: unless-stopped
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entrypoint: ["/start.py", "run", "--config-path=/data/homeserver.yaml", "--config-path=/data/workers/synapse-federation-sender-1.yaml"]
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healthcheck:
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disable: true
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networks:
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- backend
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volumes:
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- ${VOLUME_PATH}/data:/data:rw # Replace VOLUME_PATH with the path to your Synapse volume
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environment:
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SYNAPSE_WORKER: synapse.app.federation_sender
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depends_on:
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- synapse
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worker_app: synapse.app.federation_sender
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worker_name: synapse-federation-sender-1
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# The replication listener on the main synapse process.
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worker_replication_host: synapse
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worker_replication_http_port: 9093
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worker_listeners:
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- type: http
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port: 8034
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resources:
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- names: [replication]
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worker_log_config: /data/federation_sender.log.config
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worker_app: synapse.app.generic_worker
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worker_name: synapse-generic-worker-1
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# The replication listener on the main synapse process.
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worker_replication_host: synapse
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worker_replication_http_port: 9093
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worker_listeners:
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- type: http
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port: 8034
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resources:
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- names: [replication]
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- type: http
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port: 8081
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x_forwarded: true
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resources:
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- names: [client, federation]
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worker_log_config: /data/worker.log.config
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