From 12a43a2d47e5d2fff4297a515ebc96322a97d8ef Mon Sep 17 00:00:00 2001
From: Kyle Carberry <kyle@carberry.com>
Date: Thu, 1 Sep 2022 18:33:41 +0000
Subject: [PATCH] fix: Use an unnamed region instead of erroring for DERP

---
 coderd/workspaceagents.go | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/coderd/workspaceagents.go b/coderd/workspaceagents.go
index 5ed39af446de1..e65e11ad2dc5e 100644
--- a/coderd/workspaceagents.go
+++ b/coderd/workspaceagents.go
@@ -701,7 +701,13 @@ func convertWorkspaceAgent(derpMap *tailcfg.DERPMap, coordinator *tailnet.Coordi
 			}
 			region, found := derpMap.Regions[regionID]
 			if !found {
-				return codersdk.WorkspaceAgent{}, xerrors.Errorf("region %d not found in derpmap", regionID)
+				// It's possible that a workspace agent is using an old DERPMap
+				// and reports regions that do not exist. If that's the case,
+				// report the region as unknown!
+				region = &tailcfg.DERPRegion{
+					RegionID:   regionID,
+					RegionName: fmt.Sprintf("Unnamed %d", regionID),
+				}
 			}
 			workspaceAgent.DERPLatency[region.RegionName] = codersdk.DERPRegion{
 				Preferred:           node.PreferredDERP == regionID,