This adds a new routing mechanism for sync workers that resolves access tokens
to usernames via Synapse's whoami endpoint, enabling true user-level sticky
routing regardless of which device or token is used.
Previously, sticky routing relied on parsing the username from native Synapse
tokens (`syt_<base64 username>_...`), which only works with native Synapse auth
and provides device-level stickiness at best. This new approach works with any
auth system (native Synapse, MAS, etc.) because Synapse handles token validation
internally.
Implementation uses nginx's auth_request module with an njs script because:
- The whoami lookup requires an async HTTP subrequest (ngx.fetch)
- js_set handlers must return synchronously and don't support async operations
- auth_request allows the async lookup to complete, then captures the result
via response headers into nginx variables
The njs script:
- Extracts access tokens from Authorization header or query parameter
- Calls Synapse's whoami endpoint to resolve token -> username
- Caches results in a shared memory zone to minimize latency
- Returns the username via a `X-User-Identifier` header
The username is then used by nginx's upstream hash directive for consistent
worker selection. This leverages nginx's built-in health checking and failover.
gzipping certain responses is known to cause problems with QR code logins.
Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/3749
Gzipping at the synapse-reverse-proxy-companion level and not at the
level of the outer-most reverse-proxy (Traefik) also sounds non-ideal.
This change only affects setups powered by Synapse workers.
Non-worker setups (and setups powered by other homeservers) were not
having their requests go through synapse-reverse-proxy-companion anyway,
so this change does not affect them.
Future patches may enable response compression support at the Traefik level for
all setups.
* add prometheus-nginxlog-exporter role
* Rename matrix_prometheus_nginxlog_exporter_container_url to matrix_prometheus_nginxlog_exporter_container_hostname
* avoid referencing variables from other roles, handover info using group_vars/matrix_servers
* fix: stop service when uninstalling
fix: typo
move available arch's into a var
fix: text
* fix: prometheus enabled condition
Co-authored-by: ikkemaniac <ikkemaniac@localhost>
