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import os
import subprocess
import dcoscli
import docopt
import pkg_resources
from dcos import cmds, emitting, errors, mesos, util
from dcos.errors import DCOSException, DefaultError
from dcoscli import log, tables
from dcoscli.main import decorate_docopt_usage
logger = util.get_logger(__name__)
emitter = emitting.FlatEmitter()
def main():
try:
return _main()
except DCOSException as e:
emitter.publish(e)
return 1
@decorate_docopt_usage
def _main():
util.configure_process_from_environ()
args = docopt.docopt(
_doc(),
version="dcos-node version {}".format(dcoscli.version))
return cmds.execute(_cmds(), args)
def _doc():
"""
:rtype: str
"""
return pkg_resources.resource_string(
'dcoscli',
'data/help/node.txt').decode('utf-8')
def _cmds():
"""
:returns: All of the supported commands
:rtype: [Command]
"""
return [
cmds.Command(
hierarchy=['node', '--info'],
arg_keys=[],
function=_info),
cmds.Command(
hierarchy=['node', 'log'],
arg_keys=['--follow', '--lines', '--master', '--slave'],
function=_log),
cmds.Command(
hierarchy=['node', 'ssh'],
arg_keys=['--master', '--slave', '--option', '--config-file',
'--user', '--master-proxy'],
function=_ssh),
cmds.Command(
hierarchy=['node'],
arg_keys=['--json'],
function=_list),
]
def _info():
"""Print node cli information.
:returns: process return code
:rtype: int
"""
emitter.publish(_doc().split('\n')[0])
return 0
def _list(json_):
"""List DCOS nodes
:param json_: If true, output json.
Otherwise, output a human readable table.
:type json_: bool
:returns: process return code
:rtype: int
"""
client = mesos.DCOSClient()
slaves = client.get_state_summary()['slaves']
if json_:
emitter.publish(slaves)
else:
table = tables.slave_table(slaves)
output = str(table)
if output:
emitter.publish(output)
else:
emitter.publish(errors.DefaultError('No slaves found.'))
def _log(follow, lines, master, slave):
""" Prints the contents of master and slave logs.
:param follow: same as unix tail's -f
:type follow: bool
:param lines: number of lines to print
:type lines: int
:param master: whether to print the master log
:type master: bool
:param slave: the slave ID to print
:type slave: str | None
:returns: process return code
:rtype: int
"""
if not (master or slave):
raise DCOSException('You must choose one of --master or --slave.')
lines = util.parse_int(lines)
mesos_files = _mesos_files(master, slave)
log.log_files(mesos_files, follow, lines)
return 0
def _mesos_files(master, slave_id):
"""Returns the MesosFile objects to log
:param master: whether to include the master log file
:type master: bool
:param slave_id: the ID of a slave. used to include a slave's log
file
:type slave_id: str | None
:returns: MesosFile objects
:rtype: [MesosFile]
"""
files = []
if master:
files.append(mesos.MesosFile('/master/log'))
if slave_id:
slave = mesos.get_master().slave(slave_id)
files.append(mesos.MesosFile('/slave/log', slave=slave))
return files
def _ssh(master, slave, option, config_file, user, master_proxy):
"""SSH into a DCOS node using the IP addresses found in master's
state.json
:param master: True if the user has opted to SSH into the leading
master
:type master: bool | None
:param slave: The slave ID if the user has opted to SSH into a slave
:type slave: str | None
:param option: SSH option
:type option: [str]
:param config_file: SSH config file
:type config_file: str | None
:param user: SSH user
:type user: str | None
:param master_proxy: If True, SSH-hop from a master
:type master_proxy: bool | None
:rtype: int
:returns: process return code
"""
ssh_options = util.get_ssh_options(config_file, option)
dcos_client = mesos.DCOSClient()
if master:
host = mesos.MesosDNSClient().hosts('leader.mesos.')[0]['ip']
else:
summary = dcos_client.get_state_summary()
slave_obj = next((slave_ for slave_ in summary['slaves']
if slave_['id'] == slave),
None)
if slave_obj:
host = mesos.parse_pid(slave_obj['pid'])[1]
else:
raise DCOSException('No slave found with ID [{}]'.format(slave))
master_public_ip = dcos_client.metadata().get('PUBLIC_IPV4')
if master_proxy:
if not os.environ.get('SSH_AUTH_SOCK'):
raise DCOSException(
"There is no SSH_AUTH_SOCK env variable, which likely means "
"you aren't running `ssh-agent`. `dcos node ssh "
"--master-proxy` depends on `ssh-agent` to safely use your "
"private key to hop between nodes in your cluster. Please "
"run `ssh-agent`, then add your private key with `ssh-add`.")
if not master_public_ip:
raise DCOSException(("Cannot use --master-proxy. Failed to find "
"'PUBLIC_IPV4' at {}").format(
dcos_client.get_dcos_url('metadata')))
cmd = "ssh -A -t {0}{1}@{2} ssh -A -t {1}@{3}".format(
ssh_options,
user,
master_public_ip,
host)
else:
cmd = "ssh -t {0}{1}@{2}".format(
ssh_options,
user,
host)
emitter.publish(DefaultError("Running `{}`".format(cmd)))
if (not master_proxy) and master_public_ip:
emitter.publish(
DefaultError("If you are running this command from a separate "
"network than DCOS, consider using `--master-proxy`"))
return subprocess.call(cmd, shell=True)
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