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# Setting up Synapse with Workers and Systemd
This is a setup for managing synapse with systemd, including support for
managing workers. It provides a `matrix-synapse` service for the master, as
well as a `matrix-synapse-worker@` service template for any workers you
require. Additionally, to group the required services, it sets up a
`matrix-synapse.target`.
See the folder [system](system) for the systemd unit files.
The folder [workers](workers) contains an example configuration for the
`federation_reader` worker.
## Synapse configuration files
See [workers.md](../workers.md) for information on how to set up the
configuration files and reverse-proxy correctly. You can find an example worker
config in the [workers](workers) folder.
Systemd manages daemonization itself, so ensure that none of the configuration
files set either `daemonize` or `worker_daemonize`.
The config files of all workers are expected to be located in
`/etc/matrix-synapse/workers`. If you want to use a different location, edit
the provided `*.service` files accordingly.
There is no need for a separate configuration file for the master process.
## Set up
1. Adjust synapse configuration files as above.
1. Copy the `*.service` and `*.target` files in [system](system) to
`/etc/systemd/system`.
1. Run `systemctl daemon-reload` to tell systemd to load the new unit files.
1. Run `systemctl enable matrix-synapse.service`. This will configure the
synapse master process to be started as part of the `matrix-synapse.target`
target.
1. For each worker process to be enabled, run `systemctl enable
matrix-synapse-worker@<worker_name>.service`. For each `<worker_name>`, there
should be a corresponding configuration file.
`/etc/matrix-synapse/workers/<worker_name>.yaml`.
1. Start all the synapse processes with `systemctl start matrix-synapse.target`.
1. Tell systemd to start synapse on boot with `systemctl enable matrix-synapse.target`.
## Usage
Once the services are correctly set up, you can use the following commands
to manage your synapse installation:
```sh
# Restart Synapse master and all workers
systemctl restart matrix-synapse.target
# Stop Synapse and all workers
systemctl stop matrix-synapse.target
# Restart the master alone
systemctl start matrix-synapse.service
# Restart a specific worker (eg. federation_reader); the master is
# unaffected by this.
systemctl restart matrix-synapse-worker@federation_reader.service
# Add a new worker (assuming all configs are set up already)
systemctl enable matrix-synapse-worker@federation_writer.service
systemctl restart matrix-synapse.target
```
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