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#!/usr/bin/env python
# Copyright (C) 2015-2016 Red Hat, Inc. <http://www.redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
Description: This file contains the methods for starting/stopping glusterd
and other initial gluster environment setup helpers.
"""
from glusto.core import Glusto as g
def start_glusterd(servers):
"""Starts glusterd on specified servers if they are not running.
Args:
servers (list): List of server hosts on which glusterd has to be
started.
Returns:
bool : True if starting glusterd is successful on all servers.
False otherwise.
"""
cmd = "pgrep glusterd || service glusterd start"
results = g.run_parallel(servers, cmd)
rc = True
for server, ret_values in results.iteritems():
retcode, out, err = ret_values
if retcode != 0:
g.log.error("Unable to start glusterd on server %s", server)
rc = False
if not rc:
return False
return True
def stop_glusterd(servers):
"""Stops the glusterd on specified servers.
Args:
servers (list): List of server hosts on which glusterd has to be
stopped.
Returns:
bool : True if stopping glusterd is successful on all servers.
False otherwise.
"""
cmd = "service glusterd stop"
results = g.run_parallel(servers, cmd)
rc = True
for server, ret_values in results.iteritems():
retcode, out, err = ret_values
if retcode != 0:
g.log.error("Unable to start glusterd on server %s", server)
rc = False
if not rc:
return False
return True
def restart_glusterd(servers):
"""Restart the glusterd on specified servers.
Args:
servers (list): List of server hosts on which glusterd has to be
restarted.
Returns:
bool : True if restarting glusterd is successful on all servers.
False otherwise.
"""
cmd = "service glusterd restart"
results = g.run_parallel(servers, cmd)
rc = True
for server, ret_values in results.iteritems():
retcode, out, err = ret_values
if retcode != 0:
g.log.error("Unable to restart glusterd on server %s", server)
rc = False
if not rc:
return False
return True
def is_glusterd_running(servers):
"""Checks the glusterd status on specified servers.
Args:
servers (list): List of server hosts on which glusterd status has to
be checked.
Returns:
0 : if glusterd running
1 : if glusterd not running
-1 : if glusterd not running and PID is alive
"""
cmd1 = "service glusterd status"
cmd2 = "pidof glusterd"
cmd1_results = g.run_parallel(servers, cmd1)
cmd2_results = g.run_parallel(servers, cmd2)
rc = 0
for server, ret_values in cmd1_results.iteritems():
retcode, out, err = ret_values
if retcode != 0:
g.log.error("glusterd is not running on the server %s", server)
rc = 1
if cmd2_results[server][0] == 0:
g.log.error("PID of glusterd is alive and status is not "
"running")
rc = -1
return rc
# TODO: THIS IS NOT IMPLEMENTED YET. PLEASE DO THIS MANUALLY
# TILL WE IMPLEMENT THIS
def env_setup_servers(servers):
"""Set up environment on all the specified servers.
Args:
servers (list): List of server hosts on which environment has to be
setup.
Returns:
bool : True if setting up environment is successful on all servers.
False otherwise.
"""
g.log.info("The function isn't implemented fully")
g.log.info("Please setup the bricks manually.")
if not start_glusterd(servers):
return False
return True
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