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health: include DERP region name in bad derp notifications (#12530)

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Fixes tailscale/corp#20971

We added some Warnables for DERP failure situations, but their Text currently spits out the DERP region ID ("10") in the UI, which is super ugly. It would be better to provide the RegionName of the DERP region that is failing. We can do so by storing a reference to the last-known DERP map in the health package whenever we fetch one, and using it when generating the notification text.

This way, the following message...

> Tailscale could not connect to the relay server '10'. The server might be temporarily unavailable, or your Internet connection might be down.

becomes:

> Tailscale could not connect to the 'Seattle' relay server. The server might be temporarily unavailable, or your Internet connection might be down.

which is a lot more user-friendly.

Signed-off-by: Andrea Gottardo <andrea@gottardo.me>
This commit is contained in:
Andrea Gottardo
2024-06-18 16:03:17 -07:00
committed by GitHub
parent 8eb15d3d2d
commit d6a8fb20e7
4 changed files with 43 additions and 12 deletions
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3
ipn/ipnlocal/local.go
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@@ -1316,6 +1316,9 @@ func (b *LocalBackend) SetControlClientStatus(c controlclient.Client, st control
// Update our cached DERP map
dnsfallback.UpdateCache(st.NetMap.DERPMap, b.logf)
// Update the DERP map in the health package, which uses it for health notifications
b.health.SetDERPMap(st.NetMap.DERPMap)
b.send(ipn.Notify{NetMap: st.NetMap})
}
if st.URL != "" {