83 lines
2.6 KiB
Python
83 lines
2.6 KiB
Python
from __future__ import absolute_import
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import sys
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import time
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from contextlib import contextmanager
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import paramiko
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class IloCli(object):
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"""Wrapper for the iLO CLI (SMASH CLP)."""
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def __init__(self, hostname, username=None, password=None, port=22, timeout=10, window_size=None):
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"""Initialize an iLO CLI instance.
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:param hostname: iLO hostname
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:param username: iLO username
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:param password: iLO password
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:param port: SSH port
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:param window_size: window size for the SSH session (max is used if not specified)
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:param timeout: connection timeout, in seconds
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"""
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self.hostname = hostname
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self.username = username
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self.password = password
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self.port = port
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self.timeout = timeout
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self.window_size = window_size if window_size else paramiko.common.MAX_WINDOW_SIZE
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self.ssh = paramiko.SSHClient()
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self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
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self.channel = None
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def open(self):
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"""Start an interactive iLO CLI session."""
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self.ssh.connect(self.hostname, username=self.username, password=self.password,
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port=self.port, timeout=self.timeout, look_for_keys=False)
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transport = self.ssh.get_transport()
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self.channel = transport.open_session(window_size=self.window_size)
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self.channel.get_pty()
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self.channel.invoke_shell()
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def close(self):
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"""End the iLO CLI session."""
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if self.channel:
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self.channel.close()
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self.ssh.close()
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def __enter__(self):
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for _ in range(5):
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try:
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self.open()
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return self
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except paramiko.SSHException:
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sys.stdout.write("SSHException: retrying connection")
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time.sleep(30)
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sys.stdout.write("SSH: Max retries attempted. No vsp will be captured.")
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return None
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def __exit__(self, exc_type, exc_value, traceback):
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self.close()
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def read(self):
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"""Read all available output without blocking I/O."""
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buf = []
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while self.channel.recv_ready():
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data = self.channel.recv(1024)
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buf.append(data)
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return "".join(buf)
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def send(self, data):
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self.channel.send(data)
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def sendline(self, data):
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self.send(data + '\n')
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@contextmanager
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def vsp_session(self):
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"""Start a Virtual Serial Port session, returning to the CLI afterward."""
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self.sendline("vsp")
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yield self
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self.send("\x1B(") # press 'ESC ('
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