With conditional restart (install-* tags), the homeserver entry for
Synapse fell through to `restart_necessary: true`, and the worker
entries carried no flag at all, which systemd_service_manager also
treats as "restart". Every install-all and install-service synapse
therefore restarted Synapse and all of its workers, even when nothing
had changed. Without workers, systemd also restarted most bridges and
bots, whose units require matrix-synapse.service.
Compute matrix_synapse_restart_necessary from the tasks that install
what Synapse runs: homeserver.yaml, the initial config and signing key,
the log config, labels and systemd service, the container image (pulled,
self-built or customized), each worker's config, labels and systemd
service, and the downloaded or cloned extension modules. Workers follow
the same decision, as they read the same files.
Synapse also mounts the appservice registration files written by other
roles. Add matrix_homeserver_app_service_registration_changed in
group_vars/matrix_servers, which checks the registered result of each
task installing one of the files listed in
matrix_homeserver_container_extra_arguments_auto, so that a changed
registration still restarts Synapse and its workers. The double-puppet
role did not register its result; it does now.
The Synapse image pull and three extension downloads all registered
their result as `result`. The downloads run first, so the pull's result
overwrote theirs before the restart decision could read them; they now
use role-prefixed names.
QEDeDandSlavi Pantaleev
QEDeDandSlavi Pantaleev
Suguru Hirahara