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Remove code which overrides "diffusion.ssh-username" when instanced

Summary:
Ref T13529. Now that instances can be renamed, an instance may have multiple valid SSH usernames and the preferred SSH username may not be the intenal instance name.

`PhacilitySiteSource` should already always set `diffusion.ssh-username` correctly, to the current preferred SSH username (which may be "new-name" after a rename from "old-name"), so we should never be able to reach this code without an accurate `diffusion.ssh-username` value available.

The code to resolve names into instances also already works for both "ssh old-name@..." and "ssh new-name@...".

So I believe this code has no beneficial effects and only causes harm: it may force us to return "old-name" when falling through would correctly return "new-name".

Test Plan:
  - Previously: renamed an instance, then SSH'd to it using both the old and new names. Both work.
  - Previously: verified that `diffusion.ssh-username` is set correctly after a rename.
  - Verified that Diffusion "Clone" UI now shows "new-name" after an instance rename.
  - The real question here is: does this break something I'm not thinking of? And the change probably has to go to production to answer that.

Maniphest Tasks: T13529

Differential Revision: https://secure.phabricator.com/D21259
This commit is contained in:
epriestley 2020-05-15 06:25:36 -07:00
parent 3ee6b5393c
commit b1351d0fdb

View file

@ -57,15 +57,6 @@ final class AlmanacKeys extends Phobject {
} }
public static function getClusterSSHUser() { public static function getClusterSSHUser() {
// NOTE: When instancing, we currently use the SSH username to figure out
// which instance you are connecting to. We can't use the host name because
// we have no way to tell which host you think you're reaching: the SSH
// protocol does not have a mechanism like a "Host" header.
$username = PhabricatorEnv::getEnvConfig('cluster.instance');
if (strlen($username)) {
return $username;
}
$username = PhabricatorEnv::getEnvConfig('diffusion.ssh-user'); $username = PhabricatorEnv::getEnvConfig('diffusion.ssh-user');
if (strlen($username)) { if (strlen($username)) {
return $username; return $username;