Remove SSH-based driver interfaces and drivers

SSH drivers are being unsupported for about a year now. All current
stable branches of ironic are officially supporting IPMI-capable HW
simulation via virtualbmc.
All ironic-related gate jobs have already been switched
to not use or enable those drivers.

This patch finally removes SSH-based power and managemtnt driver interfaces
and all classic drivers using those from ironic code and documentation.
Related exceptions and `ssh_connect` function, together with dependency
on `paramiko` package are removed as well.

Change-Id: Ieda7249b9cd78e3be1eff37804996295fc8d3969
Closes-Bug: #1570301
Depends-On: I9b60c9fa24652e9e64e787cd4e5b0152f51e7a28

1 files changed, 0 insertions, 41 deletions

diff --git a/ironic/common/utils.py b/ironic/common/utils.py
index c6085d74e..963e1d2f8 100644
--- a/ironic/common/utils.py
+++ b/ironic/common/utils.py
@@ -32,7 +32,6 @@ from oslo_concurrency import processutils
 from oslo_log import log as logging
 from oslo_utils import netutils
 from oslo_utils import timeutils
-import paramiko
 import pytz
 import six
 
@@ -79,46 +78,6 @@ def execute(*cmd, **kwargs):
     return result
 
 
-def ssh_connect(connection):
-    """Method to connect to a remote system using ssh protocol.
-
-    :param connection: a dict of connection parameters.
-    :returns: paramiko.SSHClient -- an active ssh connection.
-    :raises: SSHConnectFailed
-
-    """
-    try:
-        ssh = paramiko.SSHClient()
-        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
-        key_contents = connection.get('key_contents')
-        if key_contents:
-            data = six.StringIO(key_contents)
-            if "BEGIN RSA PRIVATE" in key_contents:
-                pkey = paramiko.RSAKey.from_private_key(data)
-            elif "BEGIN DSA PRIVATE" in key_contents:
-                pkey = paramiko.DSSKey.from_private_key(data)
-            else:
-                # Can't include the key contents - secure material.
-                raise ValueError(_("Invalid private key"))
-        else:
-            pkey = None
-        ssh.connect(connection.get('host'),
-                    username=connection.get('username'),
-                    password=connection.get('password'),
-                    port=connection.get('port', 22),
-                    pkey=pkey,
-                    key_filename=connection.get('key_filename'),
-                    timeout=connection.get('timeout', 10))
-
-        # send TCP keepalive packets every 20 seconds
-        ssh.get_transport().set_keepalive(20)
-    except Exception as e:
-        LOG.debug("SSH connect failed: %s", e)
-        raise exception.SSHConnectFailed(host=connection.get('host'))
-
-    return ssh
-
-
 def is_valid_datapath_id(datapath_id):
     """Verify the format of an OpenFlow datapath_id.