mirror of https://github.com/avast/PurpleDome
Simplified sensor plugins, round 2
Thorsten Sick
4 years ago
parent
6db4718afc
commit
8025dbcd67
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#!/usr/bin/env python3
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""" A class you can use to add SSH features to you plugin. Useful for vm_controller/machinery classes """
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from fabric import Connection
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from app.exceptions import NetworkError
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from invoke.exceptions import UnexpectedExit
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import paramiko
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import time
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import socket
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from plugins.base.plugin_base import BasePlugin
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class SSHFeatures(BasePlugin):
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def __init__(self):
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super().__init__()
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self.c = None
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def connect(self):
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""" Connect to a machine """
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if self.c:
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return self.c
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retries = 10
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retry_sleep = 10
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timeout = 30
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while retries:
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try:
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if self.config.os() == "linux":
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uhp = self.get_ip()
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print(f"Connecting to {uhp}")
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self.c = Connection(uhp, connect_timeout=timeout)
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if self.config.os() == "windows":
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args = {}
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# args = {"key_filename": self.config.ssh_keyfile() or self.v.keyfile(vm_name=self.config.vmname())}
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if self.config.ssh_keyfile():
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args["key_filename"] = self.config.ssh_keyfile()
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if self.config.ssh_password():
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args["password"] = self.config.ssh_password()
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print(args)
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uhp = self.get_ip()
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print(uhp)
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self.c = Connection(uhp, connect_timeout=timeout, user=self.config.ssh_user(), connect_kwargs=args)
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except (paramiko.ssh_exception.SSHException, socket.timeout):
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print(f"Failed to connect, will retry {retries} times. Timeout: {timeout}")
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retries -= 1
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timeout += 10
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time.sleep(retry_sleep)
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else:
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print(f"Connection: {self.c}")
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return self.c
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print("SSH network error")
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raise NetworkError
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def remote_run(self, cmd, disown=False):
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""" Connects to the machine and runs a command there
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@param disown: Send the connection into background
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"""
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if cmd is None:
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return ""
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self.connect()
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cmd = cmd.strip()
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print("Running SSH remote run: " + cmd)
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print("Disown: " + str(disown))
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result = None
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retry = 2
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while retry > 0:
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try:
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result = self.c.run(cmd, disown=disown)
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print(result)
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# paramiko.ssh_exception.SSHException in the next line is needed for windows openssh
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except (paramiko.ssh_exception.NoValidConnectionsError, UnexpectedExit, paramiko.ssh_exception.SSHException):
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if retry <= 0:
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raise NetworkError
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else:
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self.disconnect()
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self.connect()
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retry -= 1
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print("Got some SSH errors. Retrying")
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else:
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break
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if result and result.stderr:
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print("Debug: Stderr: " + str(result.stderr.strip()))
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if result:
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return result.stdout.strip()
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return ""
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def put(self, src, dst):
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""" Send a file to a machine
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@param src: source dir
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@param dst: destination
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"""
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self.connect()
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print(f"PUT {src} -> {dst}")
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res = ""
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retries = 10
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retry_sleep = 10
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timeout = 30
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while retries:
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try:
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res = self.c.put(src, dst)
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except (paramiko.ssh_exception.SSHException, socket.timeout, UnexpectedExit):
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print(f"PUT Failed to connect, will retry {retries} times. Timeout: {timeout}")
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retries -= 1
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timeout += 10
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time.sleep(retry_sleep)
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self.disconnect()
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self.connect()
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except FileNotFoundError as e:
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print(f"File not found: {e}")
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break
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else:
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return res
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print("SSH network error on PUT command")
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raise NetworkError
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def get(self, src, dst):
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""" Get a file to a machine
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@param src: source dir
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@param dst: destination
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"""
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self.connect()
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retry = 2
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while retry > 0:
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try:
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res = self.c.get(src, dst)
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except (paramiko.ssh_exception.NoValidConnectionsError, UnexpectedExit):
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if retry <= 0:
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raise NetworkError
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else:
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self.disconnect()
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self.connect()
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retry -= 1
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print("Got some SSH errors. Retrying")
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except FileNotFoundError as e:
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print(e)
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break
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else:
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break
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return res
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def disconnect(self):
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""" Disconnect from a machine """
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if self.c:
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self.c.close()
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self.c = None
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