def SSHClient(host_tuple, cmdlist):
"""
Perform SSH client logic
"""
host, ip = host_tuple
# Link-local IPv6 support
if ip.startswith('fe80'):
# Try to assume eth0 as the interface as a fallback
ip = ip+'%'+args.interface if args.interface else ip+"%eth0"
try:
# Wait at most CONNECT_TIMEOUT seconds for asyncssh.connect() to return
with (yield from wait_for(asyncssh.connect(ip, **_SSH_OPTS), CONNECT_TIMEOUT)) as conn:
conn.usr = conn.get_extra_info("username")
log.warning('[%s:%s] SSH connection initiated', host, conn.usr)
for cmd in cmdlist:
conn.cmd = cmd.strip()
try:
# Initiate command execution
session = SSHClientSession
# Wait at most SESSION_TIMEOUT seconds for session to complete
chan, session = yield from wait_for(
conn.create_session(session, conn.cmd), SESSION_TIMEOUT)
yield from wait_for(chan.wait_closed(), SESSION_TIMEOUT)
except AIOTimeout:
session.error = "Timeout"
finally:
if session.error:
log.critical('[%s:%s] %s (%s)', host, conn.usr, conn.cmd, session.error)
log.critical('[%s:%s] Failure detected, breaking...', host, conn.usr)
sessionfailures[host] = (cmd, session.error)
break # pylint: disable=lost-exception
except (OSError, asyncssh.Error, AIOTimeout) as e:
log.error('[%s] SSH connection failed: %s', host, repr(e))
connectfailures[host] = repr(e)
finally:
_end = loop.time()
log.debug(_delimiter*40)
_fail_count = 0
for _host_tuple in _hosts:
_host = _host_tuple[0]
if _host in sessionfailures or _host in connectfailures:
_fail_count += 1
log.info('Successfully ran on %d hosts in %.03fs', (_host_count-_fail_count), (_end-_start))
if sessionfailures or connectfailures:
# Only report unique failures (_hosts set iterable)
for _host_tuple in sorted(_hosts):
_host = _host_tuple[0]
if _host in sessionfailures:
log.warning('%s command failed: %s (%s)',
_host,
sessionfailures[_host][_CMD], sessionfailures[_host][_STATUS])
if _host in connectfailures:
log.warning('%s connection failed: %s', _host, connectfailures[_host])
else:
log.info('No errors reported.')
log.debug(_delimiter*40)
log.info('Saved output script to %s', args.output)
output.close()
log_queue.stop()