Traefik also serves an internal entrypoint that all addon services
(bridges, bots, etc.) depend on, so it makes sense to have it be
available early on. It is injected as a systemd `required` dependency
for all services, so it would have been pulled earlier anyway (despite
the priority). Nevertheless, it's better to make the playbook-defined
priotities for services match, so that services are explicitly asked to
start in a more correct order.
With these changes in place now, all "start service" tasks executed by
Ansible cause a "change", indicating that all these services are started
in the correct order and none of them is unintentionally started as a
dependency for another.
@ -218,17 +218,18 @@ matrix_homeserver_sliding_sync_url: "{{ matrix_sliding_sync_base_url if matrix_s
# Additional JVB workers (jitsi_jvb.yml -- roles/galaxy/jitsi/tasks/init_additional_jvb.yml) override this variable at runtime as well.
#
# Priority levels are like this:
# - Traefik starts first with a level of 250, so that:
# - it can get an early start on obtaining SSL certificates and routing to other services as soon as they start (later)
# - so that addon services (starting later) can communicte with the homeserver via Traefik's internal entrypoint
# (see `matrix_playbook_internal_matrix_client_api_traefik_entrypoint_enabled`)
# - core services (the homeserver) get a level of ~1000
# - services that core services depend on (database, Redis, ntfy, etc.) get a lower level - between 500 and 1000
# - services that the homeserver depends on (database, Redis, ntfy, Coturn, etc.) get a lower level - between 500 and 1000
# - reverse-proxying services get level 3000
# - Matrix utility services (bridges, bots) get a level of 2000/2200, so that:
# - they can start before the reverse-proxy
# - so that, when the reverse-proxy is up (Matrix is up), all bots and bridges can be interacted with
# - monitoring services (Prometheus, Grafana, ..) get a level of 4000 - they can start later than all-of-Matrix
# - services which aren't time-sensitive (various crons and timers) get a level of 5000 - they can start later than all-of-Matrix
#
# `matrix-bot-postmoogle.service` has a higher priority number (4000), unlike other bots' priority (2200),
# because it requires SSL certificates. If Traefik is used, then Postmoogle needs to start at least after Traefik (3500) and Traefik certs dumper (3500).