def _connect(self):
self.connected = False
self.ssh = paramiko.SSHClient()
self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
try:
self.ssh.connect(self.host,
username=self.user,
password=self.password,
timeout=CLI_CONNECT_TIMEOUT)
self.connected = True
except paramiko.ssh_exception.AuthenticationException:
raise exception.RdxAPIConnectionException(
_("Authentication Error. Check login credentials"))
except Exception:
LOG.exception(_LE("Exception in connecting to Reduxio CLI"))
raise exception.RdxAPIConnectionException(
_("Failed to create ssh connection to Reduxio."
" Please check network connection or Reduxio hostname/IP."))
def _run_cmd(self, cmd):
"""Run the command and returns a dictionary of the response.
On failure, the function retries the command. After retry threshold
the function throws an error.
"""
cmd.set_json_output()
LOG.info(_LI("Running cmd: %s"), cmd)
success = False
for x in range(1, CONNECTION_RETRY_NUM):
try:
self._reconnect_if_needed()
stdin, stdout, stderr = self.ssh.exec_command( # nosec
# command input from authorized users on command line
command=six.text_type(cmd),
timeout=CLI_SSH_CMD_TIMEOUT)
success = True
break
except Exception:
LOG.exception(_LE("Error in running Reduxio CLI command"))
LOG.error(_LE("retrying(%(cur)s/%(overall)s)"), {
'cur': x,
'overall': CONNECTION_RETRY_NUM
})
self.connected = False
eventlet.sleep(CLI_CONNECTION_RETRY_SLEEP)
if not success:
raise exception.RdxAPIConnectionException(
_("Failed to connect to Redxuio CLI."
" Check your username, password or Reduxio Hostname/IP"))
str_out = stdout.read()
# Python 2.7/3.4 compatibility with the decode method
if hasattr(str_out, "decode"):
data = json.loads(str_out.decode("utf8"))
else:
data = json.loads(str_out)
if stdout.channel.recv_exit_status() != 0:
LOG.error(_LE("Failed running cli command: %s"), data["msg"])
raise exception.RdxAPICommandException(data["msg"])
LOG.debug("Command output is: %s", str_out)
return data["data"]