forked from Fediversity/Fediversity
Finished the bit about workers.
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Hans van Zijst
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commit
3236cccd71
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@ -301,7 +301,8 @@ what you need:
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* inbound socket (not every worker needs this)
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* log configuration
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One worker we use handles the login actions, this is how it's configured:
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One worker we use handles the login actions, this is how it's configured in
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/etc/matrix-synapse/workers/login.yaml`:
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```
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worker_app: "synapse.app.generic_worker"
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@ -323,13 +324,13 @@ worker_listeners:
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- names: [replication]
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```
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First listener is the socket where nginx sends all traffic related to logins
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to. You have to configure nginx to do that, we'll get to that later.
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First line defines the type of worker. In the past there were quite a few
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The first line defines the type of worker. In the past there were quite a few
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different types, but most of them have been phased out in favour of one
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generic worker.
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The first listener is the socket where nginx sends all traffic related to logins
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to. You have to configure nginx to do that, we'll get to that later.
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The `worker_log_config` defines how and where the worker logs. Of course you'll
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need to configure that too, see further.
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@ -339,7 +340,8 @@ related traffic to. Make sure nginx can write to this socket. The
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The second `listener` is used for communication with the other workers and the
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main thread. The only `resource` it needs is `replication`. This socket needs
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to be listed in the `instance_map` in the main thread.
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to be listed in the `instance_map` in the main thread, the inbound socket does
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not.
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Of course, if you need to scale up to the point where you need more than one
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machine, these listeners can no longer use UNIX sockets, but will have to use
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@ -371,9 +373,7 @@ worker_listeners:
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- path: "/run/matrix-synapse/inbound_mediaworker.sock"
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type: http
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resources:
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- names:
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- media
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- federation
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- names: [media]
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- path: "/run/matrix-synapse/replication_mediaworker.sock"
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type: http
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@ -392,6 +392,12 @@ file. As with the definitions of the workers themselves, you need a directory fo
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that. We'll use `/etc/matrix-synapse/logconf.d` for that; make it and fix the
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permissions.
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```
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mkdir /etc/matrix-synapse/logconf.d
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chgrp matrix-synapse /etc/matrix-synapse/logconf.d
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chmod 750 /etc/matrix-synapse/logconf.d
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```
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There's a lot you can configure for logging, but for now we'll give every
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worker the same layout. Here's the configuration for the `login` worker:
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@ -440,8 +446,8 @@ root:
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The only thing you need to change if the filename to which the logs are
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written. You could create only one configuration and use that in every worker,
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but that would mean all logs will end up in the same file, which may not be
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what you want.
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but that would mean all logs will end up in the same file, which is probably
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not what you want.
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See the [Python
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documentation](https://docs.python.org/3/library/logging.config.html#configuration-dictionary-schema)
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@ -469,26 +475,53 @@ WantedBy=multi-user.target
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```
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First add `matrix-synapse.service` to this target by overriding the `WantedBy`
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in the unit file (`systemctl edit matrix-synapse.service`):
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in the unit file. We're overriding and adding a bit more.
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```
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systemctl edit matrix-synapse.service
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```
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Add this to the overrides:
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```
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[Unit]
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PartOf=matrix-synapse.target
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Before=matrix-synapse-worker
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ReloadPropagatedFrom=matrix-synapse.target
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[Service]
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RuntimeDirectory=matrix-synapse
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RuntimeDirectoryMode=0775
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RuntimeDirectoryPreserve=yes
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[Install]
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WantedBy=matrix.target
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WantedBy=matrix-synapse.target
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```
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The same `WantedBy` need to go in the unit files for every worker. For the
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workers we're using a template instead of separate unit files for every single
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one. Create the template:
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The additions under `Unit` mean that `matrix-synapse.service` is part of the
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target we created earlier, and that is should start before the workers.
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Restarting the target means this service must be restarted too.
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Under `Service` we define the directory where the sockets live (`/run` is
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prefixed automatically), its permissions and that it should not be removed if
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the service is stopped.
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The `WantedBy` under `Install` includes it in the target. The target itself is
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included in `multi-user.target`, so it should always be started in the multi-user
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runlevel.
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For the workers we're using a template instead of separate unit files for every
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single one. Create the template:
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```
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systemctl edit --full --force matrix-synapse-worker@
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```
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Fill it with this content:
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Mind the `@` at the end, that's not a typo. Fill it with this content:
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```
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[Unit]
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Description=Synapse %i
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Description=Synapse worker %i
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AssertPathExists=/etc/matrix-synapse/workers/%i.yaml
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# This service should be restarted when the synapse target is restarted.
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@ -503,8 +536,8 @@ After=matrix-synapse.service
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Type=notify
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NotifyAccess=main
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User=matrix-synapse
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Group=matrix-synapse
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WorkingDirectory=/var/lib/matrix-synapse
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EnvironmentFile=-/etc/default/matrix-synapse
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ExecStart=/opt/venvs/matrix-synapse/bin/python -m synapse.app.generic_worker --config-path=/etc/matrix-synapse/homeserver.yaml --config-path=/etc/matrix-synapse/conf.d/ --config-path=/etc/matrix-synapse/workers/%i.yaml
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ExecReload=/bin/kill -HUP $MAINPID
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Restart=always
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@ -515,12 +548,28 @@ SyslogIdentifier=matrix-synapse-%i
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WantedBy=matrix-synapse.target
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```
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Now you can start/stop/restart every worker individually. Starting the `login`
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worker would be done by:
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```
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systemctl start matrix-synapse-worker@login
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```
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Every worker needs to be enabled and started individually. Quickest way to do
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that, is to run a loop in the directory:
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```
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cd /etc/matrix-synapse/workers
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for worker in `ls *yaml`; do systemctl enable --now matrix-synapse-worker@$worker; done
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for worker in `ls *yaml | sed -n 's/\.yaml//p'`; do systemctl enable matrix-synapse-worker@$worker; done
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```
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After a reboot, Synapse and all its workers should be started.
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After a reboot, Synapse and all its workers should be started. But starting
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the target should also do that:
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```
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systemctl start matrix-synapse.target
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```
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This should start `matrix-synapse.service` first, the main worker. After that
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all the workers should be started too. Check if the correct sockets appear and
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if there are any error messages in the logs.
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