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swarm-otel: route the gateway from the receiver list and check the sockets accept

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Refs #4815
This commit is contained in:
atlas 2026-10-24 20:53:47 +02:00 • committed by mara
commit 1325f44707
3 changed files with 123 additions and 19 deletions
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6
docs/swarm/services.md
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@ -334,7 +334,11 @@ It runs in a `swarm-otel` container on the hive bridge, in a network
namespace of its own. It binds no OTLP port: every receiver (one per hive,
the swarm tier's and one per service forwarder) listens on a unix socket in
`/run/swarm-otel`, a directory only the gateway's nginx and the container can
open, and the gateway forwards to them.
open, and the gateway forwards to them. The gateway's routes and the collector's
receivers come from one list, so they name the same sockets. The
`swarm-otel-sockets` unit connects to each socket as the gateway's user after
the container starts and fails if one refuses for 30 seconds, so a collector
that's up but not listening shows as a failed unit.
Every hive's own collector reaches this one by its gateway name,
`swarm.otel.domain` (default `otel.<swarm domain>`) — the same