X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=yardstick%2Fssh.py;h=d7adc0d05580b69823d5c74d7cbc94692581e408;hb=82689ccae0c247e6ceeea6154bdf7cfcf3e07abd;hp=cfbc3ca96239e084512c84671806b300390893b7;hpb=61c9612197d9a204cc7efa0a324a2b136886506f;p=yardstick.git diff --git a/yardstick/ssh.py b/yardstick/ssh.py index cfbc3ca96..d7adc0d05 100644 --- a/yardstick/ssh.py +++ b/yardstick/ssh.py @@ -64,19 +64,30 @@ Eventlet: """ from __future__ import absolute_import import os +import io import select import socket import time import re import logging + import paramiko +from chainmap import ChainMap from oslo_utils import encodeutils from scp import SCPClient import six +from yardstick.common.utils import try_int, NON_NONE_DEFAULT, make_dict_from_map +from yardstick.network_services.utils import provision_tool + -DEFAULT_PORT = 22 +def convert_key_to_str(key): + if not isinstance(key, (paramiko.RSAKey, paramiko.DSSKey)): + return key + k = io.StringIO() + key.write_private_key(k) + return k.getvalue() class SSHError(Exception): @@ -90,7 +101,39 @@ class SSHTimeout(SSHError): class SSH(object): """Represent ssh connection.""" - def __init__(self, user, host, port=DEFAULT_PORT, pkey=None, + SSH_PORT = paramiko.config.SSH_PORT + DEFAULT_WAIT_TIMEOUT = 120 + + @staticmethod + def gen_keys(key_filename, bit_count=2048): + rsa_key = paramiko.RSAKey.generate(bits=bit_count, progress_func=None) + rsa_key.write_private_key_file(key_filename) + print("Writing %s ..." % key_filename) + with open('.'.join([key_filename, "pub"]), "w") as pubkey_file: + pubkey_file.write(rsa_key.get_name()) + pubkey_file.write(' ') + pubkey_file.write(rsa_key.get_base64()) + pubkey_file.write('\n') + + @staticmethod + def get_class(): + # must return static class name, anything else refers to the calling class + # i.e. the subclass, not the superclass + return SSH + + @classmethod + def get_arg_key_map(cls): + return { + 'user': ('user', NON_NONE_DEFAULT), + 'host': ('ip', NON_NONE_DEFAULT), + 'port': ('ssh_port', cls.SSH_PORT), + 'pkey': ('pkey', None), + 'key_filename': ('key_filename', None), + 'password': ('password', None), + 'name': ('name', None), + } + + def __init__(self, user, host, port=None, pkey=None, key_filename=None, password=None, name=None): """Initialize SSH client. @@ -107,10 +150,14 @@ class SSH(object): else: self.log = logging.getLogger(__name__) + self.wait_timeout = self.DEFAULT_WAIT_TIMEOUT self.user = user self.host = host + # everybody wants to debug this in the caller, do it here instead + self.log.debug("user:%s host:%s", user, host) + # we may get text port from YAML, convert to int - self.port = int(port) + self.port = try_int(port, self.SSH_PORT) self.pkey = self._get_pkey(pkey) if pkey else None self.password = password self.key_filename = key_filename @@ -123,6 +170,20 @@ class SSH(object): else: logging.getLogger("paramiko").setLevel(logging.WARN) + @classmethod + def args_from_node(cls, node, overrides=None, defaults=None): + if overrides is None: + overrides = {} + if defaults is None: + defaults = {} + + params = ChainMap(overrides, node, defaults) + return make_dict_from_map(params, cls.get_arg_key_map()) + + @classmethod + def from_node(cls, node, overrides=None, defaults=None): + return cls(**cls.args_from_node(node, overrides, defaults)) + def _get_pkey(self, key): if isinstance(key, six.string_types): key = six.moves.StringIO(key) @@ -132,10 +193,14 @@ class SSH(object): return key_class.from_private_key(key) except paramiko.SSHException as e: errors.append(e) - raise SSHError("Invalid pkey: %s" % (errors)) + raise SSHError("Invalid pkey: %s" % errors) + + @property + def is_connected(self): + return bool(self._client) def _get_client(self): - if self._client: + if self.is_connected: return self._client try: self._client = paramiko.SSHClient() @@ -154,9 +219,24 @@ class SSH(object): raise SSHError(message % {"exception": e, "exception_type": type(e)}) + def _make_dict(self): + return { + 'user': self.user, + 'host': self.host, + 'port': self.port, + 'pkey': self.pkey, + 'key_filename': self.key_filename, + 'password': self.password, + 'name': self.name, + } + + def copy(self): + return self.get_class()(**self._make_dict()) + def close(self): - self._client.close() - self._client = False + if self._client: + self._client.close() + self._client = False def run(self, cmd, stdin=None, stdout=None, stderr=None, raise_on_error=True, timeout=3600, @@ -214,7 +294,7 @@ class SSH(object): while True: # Block until data can be read/write. - r, w, e = select.select([session], writes, [session], 1) + e = select.select([session], writes, [session], 1)[2] if session.recv_ready(): data = encodeutils.safe_decode(session.recv(4096), 'utf-8') @@ -286,19 +366,22 @@ class SSH(object): timeout=timeout, raise_on_error=False) stdout.seek(0) stderr.seek(0) - return (exit_status, stdout.read(), stderr.read()) + return exit_status, stdout.read(), stderr.read() - def wait(self, timeout=120, interval=1): + def wait(self, timeout=None, interval=1): """Wait for the host will be available via ssh.""" - start_time = time.time() + if timeout is None: + timeout = self.wait_timeout + + end_time = time.time() + timeout while True: try: return self.execute("uname") except (socket.error, SSHError) as e: self.log.debug("Ssh is still unavailable: %r", e) time.sleep(interval) - if time.time() > (start_time + timeout): - raise SSHTimeout("Timeout waiting for '%s'", self.host) + if time.time() > end_time: + raise SSHTimeout("Timeout waiting for '%s'" % self.host) def put(self, files, remote_path=b'.', recursive=False): client = self._get_client() @@ -306,6 +389,12 @@ class SSH(object): with SCPClient(client.get_transport()) as scp: scp.put(files, remote_path, recursive) + def get(self, remote_path, local_path='/tmp/', recursive=True): + client = self._get_client() + + with SCPClient(client.get_transport()) as scp: + scp.get(remote_path, local_path, recursive) + # keep shell running in the background, e.g. screen def send_command(self, command): client = self._get_client() @@ -347,3 +436,99 @@ class SSH(object): self._put_file_sftp(localpath, remotepath, mode=mode) except (paramiko.SSHException, socket.error): self._put_file_shell(localpath, remotepath, mode=mode) + + def provision_tool(self, tool_path, tool_file=None): + return provision_tool(self, tool_path, tool_file) + + def put_file_obj(self, file_obj, remotepath, mode=None): + client = self._get_client() + + with client.open_sftp() as sftp: + sftp.putfo(file_obj, remotepath) + if mode is not None: + sftp.chmod(remotepath, mode) + + def get_file_obj(self, remotepath, file_obj): + client = self._get_client() + + with client.open_sftp() as sftp: + sftp.getfo(remotepath, file_obj) + + +class AutoConnectSSH(SSH): + + @classmethod + def get_arg_key_map(cls): + arg_key_map = super(AutoConnectSSH, cls).get_arg_key_map() + arg_key_map['wait'] = ('wait', True) + return arg_key_map + + # always wait or we will get OpenStack SSH errors + def __init__(self, user, host, port=None, pkey=None, + key_filename=None, password=None, name=None, wait=True): + super(AutoConnectSSH, self).__init__(user, host, port, pkey, key_filename, password, name) + if wait and wait is not True: + self.wait_timeout = int(wait) + + def _make_dict(self): + data = super(AutoConnectSSH, self)._make_dict() + data.update({ + 'wait': self.wait_timeout + }) + return data + + def _connect(self): + if not self.is_connected: + interval = 1 + timeout = self.wait_timeout + + end_time = time.time() + timeout + while True: + try: + return self._get_client() + except (socket.error, SSHError) as e: + self.log.debug("Ssh is still unavailable: %r", e) + time.sleep(interval) + if time.time() > end_time: + raise SSHTimeout("Timeout waiting for '%s'" % self.host) + + def drop_connection(self): + """ Don't close anything, just force creation of a new client """ + self._client = False + + def execute(self, cmd, stdin=None, timeout=3600): + self._connect() + return super(AutoConnectSSH, self).execute(cmd, stdin, timeout) + + def run(self, cmd, stdin=None, stdout=None, stderr=None, + raise_on_error=True, timeout=3600, + keep_stdin_open=False, pty=False): + self._connect() + return super(AutoConnectSSH, self).run(cmd, stdin, stdout, stderr, raise_on_error, + timeout, keep_stdin_open, pty) + + def put(self, files, remote_path=b'.', recursive=False): + self._connect() + return super(AutoConnectSSH, self).put(files, remote_path, recursive) + + def put_file(self, local_path, remote_path, mode=None): + self._connect() + return super(AutoConnectSSH, self).put_file(local_path, remote_path, mode) + + def put_file_obj(self, file_obj, remote_path, mode=None): + self._connect() + return super(AutoConnectSSH, self).put_file_obj(file_obj, remote_path, mode) + + def get_file_obj(self, remote_path, file_obj): + self._connect() + return super(AutoConnectSSH, self).get_file_obj(remote_path, file_obj) + + def provision_tool(self, tool_path, tool_file=None): + self._connect() + return super(AutoConnectSSH, self).provision_tool(tool_path, tool_file) + + @staticmethod + def get_class(): + # must return static class name, anything else refers to the calling class + # i.e. the subclass, not the superclass + return AutoConnectSSH