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Random suffix only on collision.

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0.16.0 introduced random suffixes to all machine given names
(DNS hostnames) regardless of collisions within a namespace.
This commit brings Headscale more inline with Tailscale by only
adding a suffix if the hostname will collide within the namespace.

The suffix generation differs from Tailscale.
See https://tailscale.com/kb/1098/machine-names/
This commit is contained in:
=
2022-08-31 12:41:01 +01:00
committed by Kristoffer Dalby
parent 98f5b7f638
commit 2aebd2927d
5 changed files with 154 additions and 49 deletions
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4
protocol_common.go
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@@ -150,7 +150,7 @@ func (h *Headscale) handleRegisterCommon(
Bool("noise", machineKey.IsZero()).
Msg("New machine not yet in the database")
givenName, err := h.GenerateGivenName(registerRequest.Hostinfo.Hostname)
givenName, err := h.GenerateGivenName(machine.Namespace.Name, machine.MachineKey, registerRequest.Hostinfo.Hostname)
if err != nil {
log.Error().
Caller().
@@ -374,7 +374,7 @@ func (h *Headscale) handleAuthKeyCommon(
} else {
now := time.Now().UTC()
givenName, err := h.GenerateGivenName(registerRequest.Hostinfo.Hostname)
givenName, err := h.GenerateGivenName(machine.Namespace.Name, MachinePublicKeyStripPrefix(machineKey), registerRequest.Hostinfo.Hostname)
if err != nil {
log.Error().
Caller().