def Run(self, args):
command_list = args.command.split(' ') if args.command else ['bash -l']
project = properties.VALUES.core.project.Get()
connection_info = util.PrepareEnvironment(args)
command = ssh.SSHCommand(
remote=ssh.Remote(host=connection_info.host,
user=connection_info.user),
port=six.text_type(connection_info.port),
identity_file=connection_info.key,
remote_command=(['DEVSHELL_PROJECT_ID=' +
project] if project else []) + command_list,
extra_flags=args.ssh_flag,
tty=not args.command,
options={'StrictHostKeyChecking': 'no'},
)
if args.dry_run:
log.Print(' '.join(command.Build(connection_info.ssh_env)))
else:
self.done = threading.Event()
thread = threading.Thread(target=self.Reauthorize, args=())
thread.daemon = True
thread.start()
command.Run(connection_info.ssh_env)
self.done.set()
def PreliminarilyVerifyInstance(self, instance_id, remote, identity_file,
options):
"""Verify the instance's identity by connecting and running a command.
Args:
instance_id: str, id of the compute instance.
remote: ssh.Remote, remote to connect to.
identity_file: str, optional key file.
options: dict, optional ssh options.
Raises:
ssh.CommandError: The ssh command failed.
core_exceptions.NetworkIssueError: The instance id does not match.
"""
metadata_id_url = (
'http://metadata.google.internal/computeMetadata/v1/instance/id')
# Exit codes 255 and 1 are taken by OpenSSH and PuTTY.
# 23 chosen by fair dice roll.
remote_command = [
'[ `curl "{}" -H "Metadata-Flavor: Google" -q` = {} ] || exit 23'.
format(metadata_id_url, instance_id)
]
cmd = ssh.SSHCommand(remote,
identity_file=identity_file,
options=options,
remote_command=remote_command)
return_code = cmd.Run(self.env, force_connect=True) # pytype: disable=attribute-error
if return_code == 0:
return
elif return_code == 23:
raise core_exceptions.NetworkIssueError(
'Established connection with host {} but was unable to '
'confirm ID of the instance.'.format(remote.host))
raise ssh.CommandError(cmd, return_code=return_code)
def Run(self, args):
"""Connect to a running flex instance.
Args:
args: argparse.Namespace, the args the command was invoked with.
Raises:
InvalidInstanceTypeError: The instance is not supported for SSH.
MissingVersionError: The version specified does not exist.
MissingInstanceError: The instance specified does not exist.
UnattendedPromptError: Not running in a tty.
OperationCancelledError: User cancelled the operation.
ssh.CommandError: The SSH command exited with SSH exit code, which
usually implies that a connection problem occurred.
Returns:
int, The exit code of the SSH command.
"""
api_client = appengine_api_client.GetApiClientForTrack(self.ReleaseTrack())
env = ssh.Environment.Current()
env.RequireSSH()
keys = ssh.Keys.FromFilename()
keys.EnsureKeysExist(overwrite=False)
connection_details = ssh_common.PopulatePublicKey(
api_client, args.service, args.version, args.instance,
keys.GetPublicKey())
remote_command = containers.GetRemoteCommand(args.container, args.command)
tty = containers.GetTty(args.container, args.command)
cmd = ssh.SSHCommand(
connection_details.remote,
identity_file=keys.key_file, tty=tty,
remote_command=remote_command, options=connection_details.options)
return cmd.Run(env)
def RunSSHCommandToInstance(command_list,
instance,
user,
args,
ssh_helper,
explicit_output_file=None,
explicit_error_file=None,
dry_run=False):
"""Runs a SSH command to a Google Compute Engine VM.
Args:
command_list: List with the ssh command to run.
instance: The GCE VM object.
user: The user to be used for the SSH command.
args: The args used to call the gcloud instance.
ssh_helper: ssh_utils.BaseSSHCLIHelper instance initialized
for the command.
explicit_output_file: Use this file for piping stdout of the SSH command,
instead of using stdout. This is useful for
capturing the command and analyzing it.
explicit_error_file: Use this file for piping stdout of the SSH command,
instead of using stdout. This is useful for
capturing the command and analyzing it.
dry_run: Whether or not this is a dry-run (only print, not run).
Returns:
The exit code of the SSH command
Raises:
ssh.CommandError: there was an error running a SSH command
"""
external_ip_address = ssh_utils.GetExternalIPAddress(instance)
remote = ssh.Remote(external_ip_address, user)
identity_file = None
options = None
if not args.plain:
identity_file = ssh_helper.keys.key_file
options = ssh_helper.GetConfig(ssh_utils.HostKeyAlias(instance),
args.strict_host_key_checking)
extra_flags = ssh.ParseAndSubstituteSSHFlags(args, remote, user)
remainder = []
remote_command = containers.GetRemoteCommand(None, command_list)
cmd = ssh.SSHCommand(remote,
identity_file=identity_file,
options=options,
extra_flags=extra_flags,
remote_command=remote_command,
remainder=remainder)
if dry_run:
DryRunLog(' '.join(cmd.Build(ssh_helper.env)))
return 0
return_code = cmd.Run(ssh_helper.env,
force_connect=True,
explicit_output_file=explicit_output_file,
explicit_error_file=explicit_error_file)
log.out.flush()
return return_code
def Run(self, args):
command_list = args.command.split(' ') if args.command else None
connection_info = util.PrepareEnvironment(args)
command = ssh.SSHCommand(
remote=ssh.Remote(host=connection_info.host, user=connection_info.user),
port=str(connection_info.port),
identity_file=connection_info.key,
remote_command=containers.GetRemoteCommand(None, command_list),
extra_flags=args.ssh_flag,
tty=containers.GetTty(None, args.command),
options={'StrictHostKeyChecking': 'no'},
)
if args.dry_run:
log.Print(' '.join(command.Build(connection_info.ssh_env)))
else:
command.Run(connection_info.ssh_env)
def SSHToInstance(self, args, instance):
"""Helper to manage authentication followed by SSH to the instance."""
args = self._DefaultArgsForSSH(args)
external_nat = ssh_utils.GetExternalIPAddress(instance)
log.status.Print(
'Trying to SSH to VM with NAT IP:{}'.format(external_nat))
remote = ssh.Remote(external_nat, ssh.GetDefaultSshUsername())
args.ssh_key_file = ssh.Keys.DEFAULT_KEY_FILE
ssh_helper = ssh_utils.BaseSSHCLIHelper()
ssh_helper.Run(args)
identity_file = ssh_helper.keys.key_file
user, _ = ssh_utils.GetUserAndInstance(args.name)
host_keys = self._GetHostKeyFromInstance(args.zone, ssh_helper,
instance)
options = self._GetSSHOptions(args.name, ssh_helper, instance,
host_keys)
self._WaitForSSHKeysToPropagate(ssh_helper, remote, identity_file,
user, instance, options)
extra_flags = []
# Ctpu seems to be forwarding some other ports on what
# seems like the TPU node. Need to understand better before enabling.
if args.forward_ports:
extra_flags.extend([
'-A', '-L', '6006:localhost:6006', '-L', '8888:localhost:8888'
])
ssh_cmd_args = {
'remote': remote,
'identity_file': identity_file,
'options': options,
'extra_flags': extra_flags
}
cmd = ssh.SSHCommand(**ssh_cmd_args)
# Errors from SSH itself result in an ssh.CommandError being raised
return_code = cmd.Run(
ssh_helper.env,
force_connect=properties.VALUES.ssh.putty_force_connect.GetBool())
if return_code:
# This is the return code of the remote command. Problems with SSH itself
# will result in ssh.CommandError being raised above.
sys.exit(return_code)
def Run(self, args):
command_list = args.command.split(' ') if args.command else ['bash -l']
project = properties.VALUES.core.project.Get()
connection_info = util.PrepareEnvironment(args)
command = ssh.SSHCommand(
remote=ssh.Remote(host=connection_info.host,
user=connection_info.user),
port=str(connection_info.port),
identity_file=connection_info.key,
remote_command=(['DEVSHELL_PROJECT_ID=' +
project] if project else []) + command_list,
extra_flags=args.ssh_flag,
tty=not args.command,
options={'StrictHostKeyChecking': 'no'},
)
if args.dry_run:
log.Print(' '.join(command.Build(connection_info.ssh_env)))
else:
command.Run(connection_info.ssh_env)
def PreliminarilyVerifyInstance(self, instance_id, remote, identity_file,
options):
"""Verify the instance's identity by connecting and running a command.
Args:
instance_id: str, id of the compute instance.
remote: ssh.Remote, remote to connect to.
identity_file: str, optional key file.
options: dict, optional ssh options.
Raises:
ssh.CommandError: The ssh command failed.
core_exceptions.NetworkIssueError: The instance id does not match.
"""
if not properties.VALUES.ssh.verify_internal_ip.GetBool():
log.warning(
'Skipping internal IP verification connection and connecting to [{}] '
'in the current subnet. This may be the wrong host if the instance '
'is in a different subnet!'.format(remote.host))
return
metadata_id_url = (
'http://metadata.google.internal/computeMetadata/v1/instance/id')
# Exit codes 255 and 1 are taken by OpenSSH and PuTTY.
# 23 chosen by fair dice roll.
remote_command = [
'[ `curl "{}" -H "Metadata-Flavor: Google" -q` = {} ] || exit 23'
.format(metadata_id_url, instance_id)]
cmd = ssh.SSHCommand(remote, identity_file=identity_file,
options=options, remote_command=remote_command)
return_code = cmd.Run(
self.env,
force_connect=properties.VALUES.ssh.putty_force_connect.GetBool())
if return_code == 0:
return
elif return_code == 23:
raise core_exceptions.NetworkIssueError(
'Established connection with host {} but was unable to '
'confirm ID of the instance.'.format(remote.host))
raise ssh.CommandError(cmd, return_code=return_code)
def Run(self, args):
if not args.authorize_session:
log.Print(
'Automatic authentication with GCP CLI tools in Cloud Shell is '
'disabled. To enable, please rerun command with '
'`--authorize-session` flag.')
command_list = args.command.split(' ') if args.command else ['bash -l']
project = properties.VALUES.core.project.Get()
connection_info = util.PrepareEnvironment(args)
if args.authorize_session:
util.AuthorizeEnvironment()
command = ssh.SSHCommand(
remote=ssh.Remote(host=connection_info.host,
user=connection_info.user),
port=six.text_type(connection_info.port),
identity_file=connection_info.key,
remote_command=(['DEVSHELL_PROJECT_ID=' +
project] if project else []) + command_list,
extra_flags=args.ssh_flag,
tty=not args.command,
options={'StrictHostKeyChecking': 'no'},
)
if args.dry_run:
elems = command.Build(connection_info.ssh_env)
log.Print(' '.join([six.moves.shlex_quote(elem)
for elem in elems]))
elif args.authorize_session:
self.done = threading.Event()
thread = threading.Thread(target=self.Reauthorize, args=())
thread.daemon = True
thread.start()
command.Run(connection_info.ssh_env)
self.done.set()
else:
command.Run(connection_info.ssh_env)
def Run(self, args):
"""See ssh_utils.BaseSSHCLICommand.Run."""
on_prem = (
args.IsKnownAndSpecified('network') and
args.IsKnownAndSpecified('region'))
if on_prem:
args.plain = True
# These two lines are needed to ensure reauth is performed as needed, even
# for on-prem, which doesn't use the resulting variables.
holder = base_classes.ComputeApiHolder(self.ReleaseTrack())
client = holder.client
ssh_helper = ssh_utils.BaseSSHCLIHelper()
ssh_helper.Run(args)
oslogin_state = ssh.OsloginState()
if on_prem:
user, ip = ssh_utils.GetUserAndInstance(args.user_host)
remote = ssh.Remote(ip, user)
iap_tunnel_args = iap_tunnel.CreateOnPremSshTunnelArgs(
args, self.ReleaseTrack(), ip)
instance_address = ip
internal_address = ip
else:
user, instance_name = ssh_utils.GetUserAndInstance(args.user_host)
instance_ref = instance_flags.SSH_INSTANCE_RESOLVER.ResolveResources(
[instance_name], compute_scope.ScopeEnum.ZONE, args.zone,
holder.resources,
scope_lister=instance_flags.GetInstanceZoneScopeLister(client))[0]
instance = ssh_helper.GetInstance(client, instance_ref)
project = ssh_helper.GetProject(client, instance_ref.project)
host_keys = ssh_helper.GetHostKeysFromGuestAttributes(
client, instance_ref, instance, project)
iap_tunnel_args = iap_tunnel.CreateSshTunnelArgs(
args, self.ReleaseTrack(), instance_ref,
ssh_utils.GetExternalInterface(instance, no_raise=True))
internal_address = ssh_utils.GetInternalIPAddress(instance)
if args.troubleshoot:
log.status.Print(TROUBLESHOOT_HEADER.format(
instance_ref, args.zone or instance_ref.zone,
datetime.datetime.now()
))
RunTroubleshooting(project, args.zone or instance_ref.zone,
instance, iap_tunnel_args)
return
if not host_keys and host_keys is not None:
log.debug('Unable to retrieve host keys from instance metadata. '
'Continuing.')
expiration, expiration_micros = ssh_utils.GetSSHKeyExpirationFromArgs(
args)
if args.plain:
oslogin_state.oslogin_enabled = False
else:
public_key = ssh_helper.keys.GetPublicKey().ToEntry(
include_comment=True)
# If there is an '@' symbol in the user_host arg, the user is requesting
# to connect as a specific user. This may get overridden by OS Login.
username_requested = '@' in args.user_host
oslogin_state = ssh.GetOsloginState(
instance, project, user, public_key, expiration_micros,
self.ReleaseTrack(), username_requested=username_requested)
user = oslogin_state.user
log.debug(oslogin_state)
if iap_tunnel_args:
# IAP Tunnel only uses instance_address for the purpose of --ssh-flag
# substitution. In this case, dest_addr doesn't do much, it just matches
# against entries in the user's ssh_config file. It's best to use
# something unique to avoid false positive matches, thus we use
# HostKeyAlias.
instance_address = internal_address
dest_addr = ssh_utils.HostKeyAlias(instance)
elif args.internal_ip:
instance_address = internal_address
dest_addr = instance_address
else:
instance_address = ssh_utils.GetExternalIPAddress(instance)
dest_addr = instance_address
remote = ssh.Remote(dest_addr, user)
# identity_file_list will be None if security keys are not enabled.
identity_file_list = ssh.WriteSecurityKeys(oslogin_state)
identity_file = None
options = None
if not args.plain:
if not identity_file_list:
identity_file = ssh_helper.keys.key_file
options = ssh_helper.GetConfig(ssh_utils.HostKeyAlias(instance),
args.strict_host_key_checking,
host_keys_to_add=host_keys)
extra_flags = ssh.ParseAndSubstituteSSHFlags(args, remote, instance_address,
internal_address)
remainder = []
if args.ssh_args:
remainder.extend(args.ssh_args)
# Transform args.command into arg list or None if no command
command_list = args.command.split(' ') if args.command else None
tty = containers.GetTty(args.container, command_list)
remote_command = containers.GetRemoteCommand(args.container, command_list)
# Do not include default port since that will prevent users from
# specifying a custom port (b/121998342).
ssh_cmd_args = {'remote': remote,
'identity_file': identity_file,
'options': options,
'extra_flags': extra_flags,
'remote_command': remote_command,
'tty': tty,
'iap_tunnel_args': iap_tunnel_args,
'remainder': remainder,
'identity_list': identity_file_list}
cmd = ssh.SSHCommand(**ssh_cmd_args)
if args.dry_run:
# Add quotes around any arguments that contain spaces.
log.out.Print(' '.join('"{0}"'.format(arg) if ' ' in arg else arg
for arg in cmd.Build(ssh_helper.env)))
return
# Raise errors if instance requires a security key but the local
# envionment doesn't support them. This is after the 'dry-run' because
# we want to allow printing the command regardless.
if self.enable_security_keys:
ssh_utils.ConfirmSecurityKeyStatus(oslogin_state)
if args.plain or oslogin_state.oslogin_enabled:
keys_newly_added = False
else:
keys_newly_added = ssh_helper.EnsureSSHKeyExists(
client, remote.user, instance, project, expiration=expiration)
if keys_newly_added:
poller = ssh_utils.CreateSSHPoller(remote, identity_file, options,
iap_tunnel_args,
extra_flags=extra_flags)
log.status.Print('Waiting for SSH key to propagate.')
# TODO(b/35355795): Don't force_connect
try:
poller.Poll(
ssh_helper.env,
force_connect=properties.VALUES.ssh.putty_force_connect.GetBool())
except retry.WaitException:
raise ssh_utils.NetworkError()
if args.internal_ip and not on_prem:
ssh_helper.PreliminarilyVerifyInstance(instance.id, remote, identity_file,
options)
# Errors from SSH itself result in an ssh.CommandError being raised
try:
return_code = cmd.Run(
ssh_helper.env,
force_connect=properties.VALUES.ssh.putty_force_connect.GetBool())
except ssh.CommandError as e:
if not on_prem:
log.status.Print(self.createRecommendMessage(args, instance_name,
instance_ref, project))
raise e
if return_code:
# This is the return code of the remote command. Problems with SSH itself
# will result in ssh.CommandError being raised above.
sys.exit(return_code)
def Run(self, args):
"""See ssh_utils.BaseSSHCLICommand.Run."""
holder = base_classes.ComputeApiHolder(self.ReleaseTrack())
client = holder.client
ssh_helper = ssh_utils.BaseSSHCLIHelper()
ssh_helper.Run(args)
user, instance_name = ssh_utils.GetUserAndInstance(args.user_host)
instance_ref = instance_flags.SSH_INSTANCE_RESOLVER.ResolveResources(
[instance_name], compute_scope.ScopeEnum.ZONE, args.zone,
holder.resources,
scope_lister=instance_flags.GetInstanceZoneScopeLister(client))[0]
instance = ssh_helper.GetInstance(client, instance_ref)
project = ssh_helper.GetProject(client, instance_ref.project)
if self.get_host_keys:
host_keys = ssh_helper.GetHostKeysFromGuestAttributes(
client, instance_ref)
if not host_keys:
log.warning('Unable to retrieve host keys from instance metadata. '
'Continuing.')
else:
host_keys = {}
expiration, expiration_micros = ssh_utils.GetSSHKeyExpirationFromArgs(args)
if args.plain:
use_oslogin = False
else:
public_key = ssh_helper.keys.GetPublicKey().ToEntry(include_comment=True)
user, use_oslogin = ssh.CheckForOsloginAndGetUser(
instance, project, user, public_key, expiration_micros,
self.ReleaseTrack())
iap_tunnel_args = iap_tunnel.SshTunnelArgs.FromArgs(
args, self.ReleaseTrack(), instance_ref,
ssh_utils.GetExternalInterface(instance, no_raise=True))
internal_address = ssh_utils.GetInternalIPAddress(instance)
if iap_tunnel_args:
# IAP Tunnel only uses instance_address for the purpose of --ssh-flag
# substitution. In this case, dest_addr doesn't do much, it just matches
# against entries in the user's ssh_config file. It's best to use
# something unique to avoid false positive matches, thus we use
# HostKeyAlias.
instance_address = internal_address
dest_addr = ssh_utils.HostKeyAlias(instance)
elif args.internal_ip:
instance_address = internal_address
dest_addr = instance_address
else:
instance_address = ssh_utils.GetExternalIPAddress(instance)
dest_addr = instance_address
remote = ssh.Remote(dest_addr, user)
identity_file = None
options = None
if not args.plain:
identity_file = ssh_helper.keys.key_file
options = ssh_helper.GetConfig(ssh_utils.HostKeyAlias(instance),
args.strict_host_key_checking,
host_keys_to_add=host_keys)
extra_flags = ssh.ParseAndSubstituteSSHFlags(args, remote, instance_address,
internal_address)
remainder = []
if args.ssh_args:
remainder.extend(args.ssh_args)
# Transform args.command into arg list or None if no command
command_list = args.command.split(' ') if args.command else None
tty = containers.GetTty(args.container, command_list)
remote_command = containers.GetRemoteCommand(args.container, command_list)
# Do not include default port since that will prevent users from
# specifying a custom port (b/121998342).
ssh_cmd_args = {'remote': remote,
'identity_file': identity_file,
'options': options,
'extra_flags': extra_flags,
'remote_command': remote_command,
'tty': tty,
'iap_tunnel_args': iap_tunnel_args,
'remainder': remainder}
cmd = ssh.SSHCommand(**ssh_cmd_args)
if args.dry_run:
log.out.Print(' '.join(cmd.Build(ssh_helper.env)))
return
if args.plain or use_oslogin:
keys_newly_added = False
else:
keys_newly_added = ssh_helper.EnsureSSHKeyExists(
client, remote.user, instance, project, expiration=expiration)
if keys_newly_added:
poller = ssh_utils.CreateSSHPoller(remote, identity_file, options,
iap_tunnel_args,
extra_flags=extra_flags)
log.status.Print('Waiting for SSH key to propagate.')
# TODO(b/35355795): Don't force_connect
try:
poller.Poll(ssh_helper.env, force_connect=True)
except retry.WaitException:
raise ssh_utils.NetworkError()
if args.internal_ip:
ssh_helper.PreliminarilyVerifyInstance(instance.id, remote, identity_file,
options)
# Errors from SSH itself result in an ssh.CommandError being raised
return_code = cmd.Run(ssh_helper.env, force_connect=True)
if return_code:
# This is the return code of the remote command. Problems with SSH itself
# will result in ssh.CommandError being raised above.
sys.exit(return_code)
def Run(self, args):
"""See ssh_utils.BaseSSHCLICommand.Run."""
holder = base_classes.ComputeApiHolder(self.ReleaseTrack())
client = holder.client
ssh_helper = ssh_utils.BaseSSHCLIHelper()
ssh_helper.Run(args)
user, instance_name = ssh_utils.GetUserAndInstance(args.user_host)
instance_ref = instance_flags.SSH_INSTANCE_RESOLVER.ResolveResources(
[instance_name],
compute_scope.ScopeEnum.ZONE,
args.zone,
holder.resources,
scope_lister=instance_flags.GetInstanceZoneScopeLister(client))[0]
instance = ssh_helper.GetInstance(client, instance_ref)
project = ssh_helper.GetProject(client, instance_ref.project)
if args.plain:
use_oslogin = False
else:
public_key = ssh_helper.keys.GetPublicKey().ToEntry(
include_comment=True)
user, use_oslogin = ssh.CheckForOsloginAndGetUser(
instance, project, user, public_key, self.ReleaseTrack())
if args.internal_ip:
ip_address = ssh_utils.GetInternalIPAddress(instance)
else:
ip_address = ssh_utils.GetExternalIPAddress(instance)
remote = ssh.Remote(ip_address, user)
identity_file = None
options = None
if not args.plain:
identity_file = ssh_helper.keys.key_file
options = ssh_helper.GetConfig(ssh_utils.HostKeyAlias(instance),
args.strict_host_key_checking)
extra_flags = ssh.ParseAndSubstituteSSHFlags(args, remote, ip_address)
remainder = []
if args.ssh_args:
remainder.extend(args.ssh_args)
# Transform args.command into arg list or None if no command
command_list = args.command.split(' ') if args.command else None
tty = containers.GetTty(args.container, command_list)
remote_command = containers.GetRemoteCommand(args.container,
command_list)
target_remote = remote
port = ssh_utils.DEFAULT_SSH_PORT
ip_type = (ip.IpTypeEnum.INTERNAL
if args.internal_ip else ip.IpTypeEnum.EXTERNAL)
tunnel_helper = None
interface = None
if hasattr(args, 'tunnel_through_iap') and args.tunnel_through_iap:
tunnel_helper, interface = ssh_utils.CreateIapTunnelHelper(
args, instance_ref, instance, ip_type)
tunnel_helper.StartListener()
target_remote = ssh.Remote('localhost', user)
port = tunnel_helper.GetLocalPort()
cmd = ssh.SSHCommand(target_remote,
port=str(port),
identity_file=identity_file,
options=options,
extra_flags=extra_flags,
remote_command=remote_command,
tty=tty,
remainder=remainder)
if args.dry_run:
log.out.Print(' '.join(cmd.Build(ssh_helper.env)))
if tunnel_helper:
tunnel_helper.StopListener()
return
if args.plain or use_oslogin:
keys_newly_added = False
else:
keys_newly_added = ssh_helper.EnsureSSHKeyExists(
client, remote.user, instance, project)
if keys_newly_added:
poller_tunnel_helper = None
if tunnel_helper:
poller_tunnel_helper, _ = ssh_utils.CreateIapTunnelHelper(
args, instance_ref, instance, ip_type, interface=interface)
poller_tunnel_helper.StartListener(
accept_multiple_connections=True)
poller = ssh_utils.CreateSSHPoller(remote,
identity_file,
options,
poller_tunnel_helper,
extra_flags=extra_flags)
log.status.Print('Waiting for SSH key to propagate.')
# TODO(b/35355795): Don't force_connect
try:
poller.Poll(ssh_helper.env, force_connect=True)
except retry.WaitException:
if tunnel_helper:
tunnel_helper.StopListener()
raise ssh_utils.NetworkError()
finally:
if poller_tunnel_helper:
poller_tunnel_helper.StopListener()
if args.internal_ip and not tunnel_helper:
# The IAP Tunnel connection uses instance name and network interface name,
# so do not need to additionally verify the instance. Also, the
# SSHCommand used within the function does not support IAP Tunnels.
ssh_helper.PreliminarilyVerifyInstance(instance.id, remote,
identity_file, options)
try:
# Errors from SSH itself result in an ssh.CommandError being raised
return_code = cmd.Run(ssh_helper.env, force_connect=True)
finally:
if tunnel_helper:
tunnel_helper.StopListener()
if return_code:
# This is the return code of the remote command. Problems with SSH itself
# will result in ssh.CommandError being raised above.
sys.exit(return_code)
def Run(self, args):
"""See ssh_utils.BaseSSHCLICommand.Run."""
super(SshGA, self).Run(args)
user, instance_name = ssh_utils.GetUserAndInstance(
args.user_host, self._use_account_service, self.http)
instance_ref = instance_flags.SSH_INSTANCE_RESOLVER.ResolveResources(
[instance_name],
compute_scope.ScopeEnum.ZONE,
args.zone,
self.resources,
scope_lister=flags.GetDefaultScopeLister(self.compute_client))[0]
instance = self.GetInstance(instance_ref)
if self._use_internal_ip:
ip_address = ssh_utils.GetInternalIPAddress(instance)
else:
ip_address = ssh_utils.GetExternalIPAddress(instance)
remote = ssh.Remote(ip_address, user)
identity_file = None
options = None
if not args.plain:
identity_file = self.keys.key_file
options = self.GetConfig(ssh_utils.HostKeyAlias(instance),
args.strict_host_key_checking)
extra_flags = []
remainder = []
if args.ssh_flag:
for flag in args.ssh_flag:
for flag_part in flag.split(): # We want grouping here
dereferenced_flag = (flag_part.replace(
'%USER%', remote.user).replace('%INSTANCE%',
ip_address))
extra_flags.append(dereferenced_flag)
if args.ssh_args:
remainder.extend(args.ssh_args)
tty = ssh_utils.GetTty(args.container, args.command)
remote_command = ssh_utils.GetRemoteCommand(args.container,
args.command)
cmd = ssh.SSHCommand(remote,
identity_file=identity_file,
options=options,
extra_flags=extra_flags,
remote_command=remote_command,
tty=tty,
remainder=remainder)
if args.dry_run:
log.out.Print(' '.join(cmd.Build(self.env)))
return
if args.plain:
keys_newly_added = False
else:
keys_newly_added = self.EnsureSSHKeyExists(
remote.user,
instance,
instance_ref.project,
use_account_service=self._use_account_service)
if keys_newly_added:
poller = ssh.SSHPoller(
remote,
identity_file=identity_file,
options=options,
extra_flags=extra_flags,
max_wait_ms=ssh_utils.SSH_KEY_PROPAGATION_TIMEOUT_SEC)
log.status.Print('Waiting for SSH key to propagate.')
# TODO(b/35355795): Don't force_connect
try:
poller.Poll(self.env, force_connect=True)
except retry.WaitException:
raise ssh_utils.NetworkError()
if self._use_internal_ip:
self._PreliminarylyVerifyInstance(instance.id, remote,
identity_file, options,
extra_flags)
return_code = cmd.Run(self.env, force_connect=True)
if return_code:
# Can't raise an exception because we don't want any "ERROR" message
# printed; the output from `ssh` will be enough.
sys.exit(return_code)
def Run(self, args):
user, tpu_name = ssh_utils.GetUserAndInstance(args.user_tpu)
# If zone is not set, retrieve the one from the config.
if args.zone is None:
args.zone = properties.VALUES.compute.zone.Get(required=True)
# Validate the output path.
if args.output_directory:
if not args.command:
raise exceptions.InvalidArgumentException(
'--output_directory',
'cannot be specified without the `--command` '
'flag. Please specify the `--command` flag or remove the '
'--output-directory flag.')
output_directory_path = os.path.abspath(
os.path.expandvars(os.path.expanduser(args.output_directory)))
if not os.path.isdir(output_directory_path):
raise exceptions.InvalidArgumentException(
'--output_directory',
'Failed to find directory {}. Please create '
'it or specify another directory'.format(
output_directory_path))
# Retrieve the node.
tpu = tpu_utils.TPUNode(self.ReleaseTrack())
node = tpu.Get(tpu_name, args.zone)
if not tpu_utils.IsTPUVMNode(node):
raise exceptions.BadArgumentException(
'TPU',
'this command is only available for Cloud TPU VM nodes. To access '
'this node, please see '
'https://cloud.google.com/tpu/docs/creating-deleting-tpus.')
tpu_ssh_utils.ValidateTPUState(node.state,
tpu.messages.Node.StateValueValuesEnum)
worker_ips = tpu_ssh_utils.ParseWorkerFlag(args.worker,
node.networkEndpoints,
args.internal_ip)
if len(worker_ips) > 1 and not args.command:
raise exceptions.InvalidArgumentException(
'--worker',
'cannot target multiple workers without the `--command` '
'flag.')
# Retrieve GuestAttributes.
single_pod_worker = len(
node.networkEndpoints) > 1 and len(worker_ips) == 1
if single_pod_worker:
# Retrieve only that worker's GuestAttributes.
worker_id = list(worker_ips)[0]
guest_attributes_response = tpu.GetGuestAttributes(
tpu_name, args.zone, six.text_type((worker_id)))
host_key_suffixes = tpu_ssh_utils.GetHostKeySuffixes(
guest_attributes_response.guestAttributes,
len(node.networkEndpoints), worker_id)
else:
# Retrieve the GuestAttributes for all workers in that TPU.
guest_attributes_response = tpu.GetGuestAttributes(
tpu_name, args.zone)
host_key_suffixes = tpu_ssh_utils.GetHostKeySuffixes(
guest_attributes_response.guestAttributes)
# Generate the public key.
ssh_helper = ssh_utils.BaseSSHCLIHelper()
ssh_helper.Run(args)
public_key = ssh_helper.keys.GetPublicKey().ToEntry()
project = tpu_utils.GetProject(self.ReleaseTrack(), ssh_helper)
if not args.plain:
# If there is an '@' symbol in the user_host arg, the user is requesting
# to connect as a specific user. This may get overridden by OS Login.
username_requested = '@' in args.user_tpu
_, expiration_micros = ssh_utils.GetSSHKeyExpirationFromArgs(args)
oslogin_state = ssh.GetOsloginState(
None,
project,
user,
public_key,
expiration_micros,
self.ReleaseTrack(),
username_requested=username_requested,
instance_enable_oslogin=tpu_ssh_utils.TpuHasOsLoginEnabled(
node))
user = oslogin_state.user
# Format the key correctly.
public_key = '{1}:{0} {1}'.format(public_key, user)
if not args.plain and not args.dry_run:
tpu_ssh_utils.AddSSHKeyIfNeeded(project, tpu, node, tpu_name,
args.zone, public_key)
command_list = args.command.split(' ') if args.command else None
remainder = []
if args.ssh_args:
remainder.extend(args.ssh_args)
if args.output_directory:
log.status.Print(
'Preparing SSH command execution; output will be logged '
'to {}'.format(output_directory_path))
instance_names = {}
if (args.IsKnownAndSpecified('tunnel_through_iap')
and args.tunnel_through_iap):
# Retrieve the instance names from the GuestAttributes.
for worker in worker_ips:
# The GuestAttributes will only have one entry if we're targeting a
# single worker.
index = 0 if single_pod_worker else worker
instance_name = tpu_ssh_utils.GetFromGuestAttributes(
guest_attributes_response.guestAttributes, index,
'hostname')
if instance_name is None:
log.status.Print('Failed to connect to TPU.')
log.status.Print(tpu_ssh_utils.IAP_TROUBLESHOOTING_HELP)
raise tpu_exceptions.IapTunnelingUnavailable()
instance_names[worker] = instance_name
ssh_threads = []
exit_statuses = [None] * len(worker_ips)
for worker, ips in worker_ips.items():
identity_file = None
options = None
if not args.plain:
identity_file = ssh_helper.keys.key_file
options = ssh_helper.GetConfig(
tpu_ssh_utils.GetInstanceID(node.id, worker,
host_key_suffixes),
args.strict_host_key_checking, None)
remote = ssh.Remote(ips.ip_address, user)
extra_flags = ssh.ParseAndSubstituteSSHFlags(
args, remote, ips.ip_address, ips.internal_address)
iap_tunnel_args = None
if (args.IsKnownAndSpecified('tunnel_through_iap')
and args.tunnel_through_iap):
# Retrieve the instance name from the GuestAttributes.
instance_name = instance_names[worker]
iap_tunnel_args = tpu_ssh_utils.CreateSshTunnelArgs(
args, self.ReleaseTrack(), project, args.zone,
instance_name)
cmd = ssh.SSHCommand(remote=remote,
identity_file=identity_file,
remote_command=command_list,
extra_flags=extra_flags,
options=options,
remainder=remainder,
iap_tunnel_args=iap_tunnel_args)
if args.dry_run:
log.out.Print(' '.join(cmd.Build(ssh_helper.env)))
continue
output_file_writer = None
if args.output_directory:
output_file_writer = FileWriter('{}/{}.log'.format(
output_directory_path, six.text_type(worker)))
if len(worker_ips) > 1:
# Run the command on multiple workers concurrently.
ssh_threads.append(
threading.Thread(
target=tpu_ssh_utils.AttemptRunWithRetries,
args=('SSH', worker, exit_statuses, cmd,
ssh_helper.env, output_file_writer, True,
SSHRunCmd)))
ssh_threads[-1].start()
else:
# Run on a single worker.
tpu_ssh_utils.AttemptRunWithRetries('SSH', worker,
exit_statuses, cmd,
ssh_helper.env,
output_file_writer, False,
SSHRunCmd)
if len(worker_ips) > 1:
# Wait for all the threads to complete.
for i in range(len(ssh_threads)):
ssh_threads[i].join()
# Exit with a nonzero code, if there are any.
# This ensures that if any command failed on a worker, we don't end up
# returning 0 for a value.
for status in exit_statuses:
if status:
sys.exit(status)
def SSHToInstance(self, args, instance):
"""Helper to manage authentication followed by SSH to the instance."""
args = self._DefaultArgsForSSH(args)
external_nat = ssh_utils.GetExternalIPAddress(instance)
log.status.Print(
'Trying to SSH to VM with NAT IP:{}'.format(external_nat))
args.ssh_key_file = ssh.Keys.DEFAULT_KEY_FILE
ssh_helper = ssh_utils.BaseSSHCLIHelper()
ssh_helper.Run(args)
identity_file = ssh_helper.keys.key_file
user, _ = ssh_utils.GetUserAndInstance(args.name)
host_keys = self._GetHostKeyFromInstance(args.zone, ssh_helper, instance)
options = self._GetSSHOptions(args.name, ssh_helper,
instance, host_keys)
public_key = ssh_helper.keys.GetPublicKey().ToEntry(include_comment=True)
user, use_oslogin = ssh.CheckForOsloginAndGetUser(
instance,
ssh_helper.GetProject(
self.client, properties.VALUES.core.project.Get(required=True)),
user,
public_key,
None,
self.release_track,
username_requested=False)
remote = ssh.Remote(external_nat, user)
if not use_oslogin:
self._WaitForSSHKeysToPropagate(ssh_helper, remote, identity_file, user,
instance, options)
extra_flags = []
# Ctpu seems to be forwarding some other ports on what
# seems like the TPU node. Need to understand better before enabling.
if args.forward_ports:
extra_flags.extend(
['-A', '-L', '6006:localhost:6006', '-L', '8888:localhost:8888'])
ssh_cmd_args = {
'remote': remote,
'identity_file': identity_file,
'options': options,
'extra_flags': extra_flags
}
cmd = ssh.SSHCommand(**ssh_cmd_args)
max_attempts = 10
sleep_interval = 30
# Since the instance was just created, it can take a while for the instance
# to be ready to accept ssh connections, therefore retry up to 5m. Doesn't
# need to be backed off, regular interval retry is sufficient since we
# aren't looking to throttle.
for i in range(max_attempts):
try:
log.status.Print('SSH Attempt #{}...'.format(i))
# Errors from SSH itself result in an ssh.CommandError being raised
return_code = cmd.Run(
ssh_helper.env,
force_connect=properties.VALUES.ssh.putty_force_connect.GetBool())
if return_code:
# This is the return code of the remote command.
# Problems with SSH itself will result in ssh.CommandError
# being raised above.
sys.exit(return_code)
except ssh.CommandError as e:
if i == max_attempts - 1:
raise e
log.status.Print(
'Retrying: SSH command error: {}'.format(six.text_type(e)))
time.sleep(sleep_interval)
continue
break
def Run(self, args):
"""See ssh_utils.BaseSSHCLICommand.Run."""
holder = base_classes.ComputeApiHolder(self.ReleaseTrack())
client = holder.client
ssh_helper = ssh_utils.BaseSSHCLIHelper()
ssh_helper.Run(args)
user, instance_name = ssh_utils.GetUserAndInstance(args.user_host)
instance_ref = instance_flags.SSH_INSTANCE_RESOLVER.ResolveResources(
[instance_name],
compute_scope.ScopeEnum.ZONE,
args.zone,
holder.resources,
scope_lister=instance_flags.GetInstanceZoneScopeLister(client))[0]
instance = ssh_helper.GetInstance(client, instance_ref)
project = ssh_helper.GetProject(client, instance_ref.project)
if args.plain:
use_oslogin = False
else:
user, use_oslogin = ssh_helper.CheckForOsloginAndGetUser(
instance, project, user, self.ReleaseTrack())
if self._use_internal_ip:
ip_address = ssh_utils.GetInternalIPAddress(instance)
else:
ip_address = ssh_utils.GetExternalIPAddress(instance)
remote = ssh.Remote(ip_address, user)
identity_file = None
options = None
if not args.plain:
identity_file = ssh_helper.keys.key_file
options = ssh_helper.GetConfig(ssh_utils.HostKeyAlias(instance),
args.strict_host_key_checking)
extra_flags = ssh.ParseAndSubstituteSSHFlags(args, remote, ip_address)
remainder = []
if args.ssh_args:
remainder.extend(args.ssh_args)
# Transform args.command into arg list or None if no command
command_list = args.command.split(' ') if args.command else None
tty = containers.GetTty(args.container, command_list)
remote_command = containers.GetRemoteCommand(args.container,
command_list)
cmd = ssh.SSHCommand(remote,
identity_file=identity_file,
options=options,
extra_flags=extra_flags,
remote_command=remote_command,
tty=tty,
remainder=remainder)
if args.dry_run:
log.out.Print(' '.join(cmd.Build(ssh_helper.env)))
return
if args.plain or use_oslogin:
keys_newly_added = False
else:
keys_newly_added = ssh_helper.EnsureSSHKeyExists(
client, remote.user, instance, project)
if keys_newly_added:
poller = ssh.SSHPoller(
remote,
identity_file=identity_file,
options=options,
extra_flags=extra_flags,
max_wait_ms=ssh_utils.SSH_KEY_PROPAGATION_TIMEOUT_SEC)
log.status.Print('Waiting for SSH key to propagate.')
# TODO(b/35355795): Don't force_connect
try:
poller.Poll(ssh_helper.env, force_connect=True)
except retry.WaitException:
raise ssh_utils.NetworkError()
if self._use_internal_ip:
ssh_helper.PreliminarilyVerifyInstance(instance.id, remote,
identity_file, options)
return_code = cmd.Run(ssh_helper.env, force_connect=True)
if return_code:
# Can't raise an exception because we don't want any "ERROR" message
# printed; the output from `ssh` will be enough.
sys.exit(return_code)
def Run(self, args):
"""See ssh_utils.BaseSSHCommand.Run."""
holder = base_classes.ComputeApiHolder(self.ReleaseTrack())
cua_holder = base_classes.ComputeUserAccountsApiHolder(
self.ReleaseTrack())
client = holder.client
ssh_helper = ssh_utils.BaseSSHHelper()
ssh_helper.Run(args)
ssh_helper.keys.EnsureKeysExist(args.force_key_file_overwrite,
allow_passphrase=True)
remote = ssh.Remote.FromArg(args.user_host)
if not remote:
raise ssh_utils.ArgumentError(
'Expected argument of the form [USER@]INSTANCE. Received [{0}].'
.format(args.user_host))
if not remote.user:
remote.user = ssh.GetDefaultSshUsername()
hostname = '[{0}]:{1}'.format(args.serial_port_gateway,
CONNECTION_PORT)
# Update google_compute_known_hosts file with published host key
if args.serial_port_gateway == SERIAL_PORT_GATEWAY:
http_client = http.Http()
http_response = http_client.request(HOST_KEY_URL)
known_hosts = ssh.KnownHosts.FromDefaultFile()
if http_response[0]['status'] == '200':
host_key = http_response[1].strip()
known_hosts.Add(hostname, host_key, overwrite=True)
known_hosts.Write()
elif known_hosts.ContainsAlias(hostname):
log.warn(
'Unable to download and update Host Key for [{0}] from [{1}]. '
'Attempting to connect using existing Host Key in [{2}]. If '
'the connection fails, please try again to update the Host '
'Key.'.format(SERIAL_PORT_GATEWAY, HOST_KEY_URL,
known_hosts.file_path))
else:
known_hosts.Add(hostname, DEFAULT_HOST_KEY)
known_hosts.Write()
log.warn(
'Unable to download Host Key for [{0}] from [{1}]. To ensure '
'the security of the SSH connetion, gcloud will attempt to '
'connect using a hard-coded Host Key value. If the connection '
'fails, please try again. If the problem persists, try '
'updating gcloud and connecting again.'.format(
SERIAL_PORT_GATEWAY, HOST_KEY_URL))
instance_ref = instance_flags.SSH_INSTANCE_RESOLVER.ResolveResources(
[remote.host],
compute_scope.ScopeEnum.ZONE,
args.zone,
holder.resources,
scope_lister=instance_flags.GetInstanceZoneScopeLister(client))[0]
instance = ssh_helper.GetInstance(client, instance_ref)
project = ssh_helper.GetProject(client, instance_ref.project)
# Determine the serial user, host tuple (remote)
port = 'port={0}'.format(args.port)
constructed_username_list = [
instance_ref.project, instance_ref.zone,
instance_ref.Name(), remote.user, port
]
if args.extra_args:
for k, v in args.extra_args.items():
constructed_username_list.append('{0}={1}'.format(k, v))
serial_user = '******'.join(constructed_username_list)
serial_remote = ssh.Remote(args.serial_port_gateway, user=serial_user)
identity_file = ssh_helper.keys.key_file
options = ssh_helper.GetConfig(hostname,
strict_host_key_checking='yes')
del options['HostKeyAlias']
cmd = ssh.SSHCommand(serial_remote,
identity_file=identity_file,
port=CONNECTION_PORT,
options=options)
if args.dry_run:
log.out.Print(' '.join(cmd.Build(ssh_helper.env)))
return
ssh_helper.EnsureSSHKeyExists(client, cua_holder.client, remote.user,
instance, project)
# Don't wait for the instance to become SSHable. We are not connecting to
# the instance itself through SSH, so the instance doesn't need to have
# fully booted to connect to the serial port. Also, ignore exit code 255,
# since the normal way to terminate the serial port connection is ~. and
# that causes ssh to exit with 255.
try:
return_code = cmd.Run(ssh_helper.env, force_connect=True)
except ssh.CommandError:
return_code = 255
if return_code:
sys.exit(return_code)
def Run(self, args):
"""Connect to a running flex instance.
Args:
args: argparse.Namespace, the args the command was invoked with.
Raises:
InvalidInstanceTypeError: The instance is not supported for SSH.
MissingVersionError: The version specified does not exist.
MissingInstanceError: The instance specified does not exist.
UnattendedPromptError: Not running in a tty.
OperationCancelledError: User cancelled the operation.
ssh.CommandError: The SSH command exited with SSH exit code, which
usually implies that a connection problem occurred.
Returns:
int, The exit code of the SSH command.
"""
api_client = appengine_api_client.GetApiClient()
env = ssh.Environment.Current()
env.RequireSSH()
keys = ssh.Keys.FromFilename()
keys.EnsureKeysExist(overwrite=False)
try:
version = api_client.GetVersionResource(service=args.service,
version=args.version)
except api_exceptions.NotFoundError:
raise command_exceptions.MissingVersionError('{}/{}'.format(
args.service, args.version))
version = version_util.Version.FromVersionResource(version, None)
if version.environment is not util.Environment.FLEX:
if version.environment is util.Environment.MANAGED_VMS:
environment = 'Managed VMs'
msg = 'Use `gcloud compute ssh` for Managed VMs instances.'
else:
environment = 'Standard'
msg = None
raise command_exceptions.InvalidInstanceTypeError(environment, msg)
res = resources.REGISTRY.Parse(
args.instance,
params={
'appsId': properties.VALUES.core.project.GetOrFail,
'versionsId': args.version,
'instancesId': args.instance,
'servicesId': args.service,
},
collection='appengine.apps.services.versions.instances')
rel_name = res.RelativeName()
try:
instance = api_client.GetInstanceResource(res)
except api_exceptions.NotFoundError:
raise command_exceptions.MissingInstanceError(rel_name)
if not instance.vmDebugEnabled:
log.warn(ENABLE_DEBUG_WARNING)
console_io.PromptContinue(cancel_on_no=True,
throw_if_unattended=True)
user = ssh.GetDefaultSshUsername()
remote = ssh.Remote(instance.vmIp, user=user)
public_key = keys.GetPublicKey().ToEntry()
ssh_key = '{user}:{key} {user}'.format(user=user, key=public_key)
log.status.Print(
'Sending public key to instance [{}].'.format(rel_name))
api_client.DebugInstance(res, ssh_key)
options = {
'IdentitiesOnly':
'yes', # No ssh-agent as of yet
'UserKnownHostsFile':
ssh.KnownHosts.DEFAULT_PATH,
'CheckHostIP':
'no',
'HostKeyAlias':
HOST_KEY_ALIAS.format(project=api_client.project,
instance_id=args.instance)
}
cmd = ssh.SSHCommand(remote,
identity_file=keys.key_file,
options=options)
if args.container:
cmd.tty = True
cmd.remote_command = ['container_exec', args.container, '/bin/sh']
return cmd.Run(env)
