Add debug logs related to SSH connection establishment

In order to obtain more information about the issue #TOBIKO-171, related
to ssh commands that get stuck forever, this patch adds some debug logs.

Related-ticket: #TOBIKO-171
Change-Id: Ic4703effafdffe9647af4e4fbcd4b60ad0ab1763
Signed-off-by: Eduardo Olivares <eolivare@redhat.com>

tobiko/shell/sh/_ssh.py

@@ -135,8 +135,11 @@ class SSHShellProcessFixture(_process.ShellProcessFixture):
             LOG.debug(f"Create remote process... ({details})")
             try:
                 client = ssh_client.connect()
+                LOG.debug("SSH client connected - Establishing session with "
+                          f"timeout = {self.open_session_timeout}")
                 process = client.get_transport().open_session(
                     timeout=self.open_session_timeout)
+                LOG.debug("Remote session created")
                 if environment:
                     variables = " ".join(
                         f"{name}={shlex.quote(value)}"

tobiko/shell/ssh/_client.py

@@ -398,6 +398,7 @@ class SSHClientFixture(tobiko.SharedFixture):
                 else:
                     break
 
+        LOG.debug("SSH connection ensured")
         return client
 
     def close(self):