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Brad Fitzpatrick 4111d4be4b ssh/tailssh: fix integration test hang due to missing host keys ... Commit f905871fb moved host key generation from the ipnLocalBackend interface (GetSSH_HostKeys) to the standalone getHostKeys function, which requires either system host keys in /etc/ssh/ or a valid TailscaleVarRoot to generate keys into. The testBackend returned "" for TailscaleVarRoot, and the Docker test containers only install openssh-client (no server host keys), so getHostKeys always failed. When getHostKeys fails, HandleSSHConn returns the error but never closes the TCP connection, so SSH clients hang forever waiting for the server hello. Fix by creating a temp directory in TestMain and returning it from testBackend.TailscaleVarRoot(). Regression from f905871fb #18949 ("ipn/ipnlocal, feature/ssh: move SSH code out of LocalBackend to feature"). I was apparently too impatient to wait for the test to complete and didn't connect the dots: https://github.com/tailscale/tailscale/actions/runs/22930275950 We should make that test faster (#19244) for the patience issue, but also fail more nicely if this happens in the future. Updates #19244 Change-Id: If82393b8f35413b04174e6f7d09a1ee3a2125a6b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>		2 weeks ago
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tailssh	ssh/tailssh: fix integration test hang due to missing host keys	2 weeks ago