def _log(follow, lines, leader, slave, component, filters):
""" Prints the contents of leader 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 leader: whether to print the leading master's log
:type leader: bool
:param slave: the slave ID to print
:type slave: str | None
:param component: DC/OS component name
:type component: string
:param filters: a list of filters ["key:value", ...]
:type filters: list
:returns: process return code
:rtype: int
"""
if not (leader or slave):
raise DCOSException('You must choose one of --leader or --mesos-id.')
if lines is None:
lines = 10
lines = util.parse_int(lines)
if log.dcos_log_enabled(version=2):
_dcos_log_v2(follow, lines, leader, slave, component, filters)
return 0
if not log.has_journald_capability():
if component or filters:
raise DCOSException('--component or --filter is not '
'supported by files API')
# fall back to mesos files API.
mesos_files = _mesos_files(leader, slave)
log.log_files(mesos_files, follow, lines)
return 0
# dcos-log does not support logs from leader and agent.
if leader and slave:
raise DCOSException(
'You must choose one of --leader or --mesos-id.')
# if journald logging enabled.
_dcos_log(follow, lines, leader, slave, component, filters)
return 0
def _log(follow, lines, leader, slave, component, filters):
""" Prints the contents of leader 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 leader: whether to print the leading master's log
:type leader: bool
:param slave: the slave ID to print
:type slave: str | None
:param component: DC/OS component name
:type component: string
:param filters: a list of filters ["key:value", ...]
:type filters: list
:returns: process return code
:rtype: int
"""
if not (leader or slave):
raise DCOSException('You must choose one of --leader or --mesos-id.')
if lines is None:
lines = 10
lines = util.parse_int(lines)
if not log.has_journald_capability():
if component or filters:
raise DCOSException('--component or --filter is not '
'supported by files API')
# fall back to mesos files API.
mesos_files = _mesos_files(leader, slave)
log.log_files(mesos_files, follow, lines)
return 0
# dcos-log does not support logs from leader and agent.
if leader and slave:
raise DCOSException(
'You must choose one of --leader or --mesos-id.')
# if journald logging enabled.
_dcos_log(follow, lines, leader, slave, component, filters)
return 0