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fix: allow coderd to start with an empty DERP map when built-in DERP is disabled (#24544)

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Allow coderd to start with an empty base DERP map when built-in DERP
is disabled and no static DERP map is configured, so DERP can come from
workspace proxies after startup.

Also add a DERP healthcheck warning when no DERP servers are currently
available at runtime.

Related to: https://linear.app/codercom/issue/PLAT-43/bug-coderd-unable-to-be-started-if-built-in-derp-server-disabled-and
Related to: https://github.com/coder/coder/issues/22324
This commit is contained in:
George K
2026-04-28 09:17:08 -07:00
committed by GitHub
parent 1926b7e658
commit 3f0e015fe5
13 changed files with 125 additions and 70 deletions
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docs/admin/monitoring/health-check.md
+19
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@@ -173,6 +173,25 @@ curl -v "https://coder.company.com/derp"
# DERP requires connection upgrade
```
### EDERP03
#### No DERP servers available
**Problem:** This is shown when Coder's effective DERP map does not contain
any DERP servers. Without at least one working DERP server, workspace
networking may not work.
This can happen if the built-in DERP server is disabled and no external DERP
map is configured, or if workspace proxies are expected to provide DERP but no
healthy DERP-enabled proxy is currently available.
**Solution:** Ensure that at least one DERP server is available to the
deployment. For example:
- Restart `coderd` with the built-in DERP server enabled
- Restart `coderd` with an external DERP map configured
- Make sure a workspace proxy with DERP server enabled is running and healthy
### ESTUN01
#### No STUN servers available
docs/reference/api/schemas.md
Generated
+3 -3
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@@ -13751,9 +13751,9 @@ Zero means unspecified. There might be a limit, but the client need not try to r
#### Enumerated Values
| Value(s) |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `EACS01`, `EACS02`, `EACS03`, `EACS04`, `EDB01`, `EDB02`, `EDERP01`, `EDERP02`, `EPD01`, `EPD02`, `EPD03`, `EUNKNOWN`, `EWP01`, `EWP02`, `EWP04`, `EWS01`, `EWS02`, `EWS03` |
| Value(s) |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `EACS01`, `EACS02`, `EACS03`, `EACS04`, `EDB01`, `EDB02`, `EDERP01`, `EDERP02`, `EDERP03`, `EPD01`, `EPD02`, `EPD03`, `EUNKNOWN`, `EWP01`, `EWP02`, `EWP04`, `EWS01`, `EWS02`, `EWS03` |
## health.Message