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# Copyright (C) 2017-2018 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: Library for gluster geo-replication operations
"""
from glusto.core import Glusto as g
from glustolibs.gluster.gluster_init import restart_glusterd
from glustolibs.gluster.geo_rep_ops import (create_shared_storage,
georep_groupadd,
georep_geoaccount,
georep_mountbroker_setup,
georep_mountbroker_adduser,
georep_mountbroker_status,
georep_geoaccount_setpasswd,
georep_ssh_keygen,
georep_ssh_copyid,
georep_createpem, georep_create,
georep_set_pemkeys,
georep_config_set)
def georep_root_prerequisites(mnode, snode, user, passwd):
"""Takes care of the pre-requisites required for
setting up a successful geo-rep
session which includes:
1. Check if shared_storage has been successfully created
2. Check if shared_storage has been mounted
3. Generating the common pem pub file on all the nodes
on the master
4. Establishing passwordless ssh connection to the slave
Args:
mnode (str) : The primary master node where the commands are executed
snode (str) : The primary slave node where the commande are executed
mastervol (str) : The name of the master volume
slavevol (str): The name of the slave volume
Returns:
bool : True if all the steps are successful, false if there are
any failures in the middle
"""
g.log.debug("Enable shared-storage")
ret, _, _ = create_shared_storage(mnode)
if not ret:
g.log.error("Failed to create gluster shared storage on "
"the master cluster")
return False
g.log.debug("Creating a common pem pub file on all the nodes in "
"the master to establish passwordless ssh connection "
"to the slave ")
ret = georep_ssh_keygen(mnode)
if not ret:
g.log.error("Failed to create a common pem pub file")
return False
g.log.debug("Establishing passwordless ssh between master and slave")
ret = georep_ssh_copyid(mnode, snode, user, passwd)
if not ret:
g.log.error("Failed to establish ssh connection")
return False
g.log.info("Shared storage has been created. "
"Passwordless ssh between the master and the "
"slave has been successful!")
return True
def georep_create_root_session(mnode, snode, mastervol, slavevol,
user=None, force=False):
""" Create a geo-replication session between the master and
the slave
Args:
mnode (str) : The primary master node where the commands are executed
snode (str) : The primary slave node where the commande are executed
mastervol (str) : The name of the master volume
slavevol (str): The name of the slave volume
user (str): Since it's a root session, user is root or None
force (bool) : Set to true if session needs to be created with force
else it remains false as the default option
Returns:
bool : True if all the steps are successful, false if there are
any failures in the middle
"""
g.log.debug("Creating a common pem file on %s", mnode)
ret, out, err = georep_createpem(mnode)
if not ret:
g.log.error("Failed to create a common pem file on all the nodes "
"belonging to the cluster %s ", mnode)
g.log.error("Error: out: %s \nerr: %s", out, err)
return False
g.log.debug("Create geo-rep session from %s to %s", mnode, snode)
ret, out, err = georep_create(mnode, mastervol, snode,
slavevol, user, force)
if not ret:
g.log.error("Failed to create geo-rep session")
g.log.error("Error: out: %s \nerr: %s", out, err)
return False
g.log.debug("Setting up meta-volume on %s", mnode)
ret, out, err = georep_config_set(mnode, mastervol, snode, slavevol,
"use_meta_volume", "True")
if not ret:
g.log.error("Failed to set up meta-volume")
g.log.error("Error: out: %s \nerr: %s", out, err)
return False
g.log.info("Pem file has been created and the keys have "
"been pushed to all the slave nodes. The meta-volume "
"has been successfully configured as well ")
return True
def georep_nonroot_prerequisites(mnode, snodes, group, user, mntbroker_dir,
slavevol):
""" Setup pre-requisites for mountbroker setup
Args:
mnode (str) : Master node on which cmd is to be executed
snodes (list): List of slave nodes
group (str): Specifies a group name
user (str): Specifies a user name
mntbroker_dir: Mountbroker mount directory
slavevol (str) The name of the slave volume
Returns:
bool: True if all pre-requisite are successful else False
"""
g.log.debug("Enable shared-storage")
ret, _, err = create_shared_storage(mnode)
if ret:
if "already exists" not in err:
g.log.error("Failed to enable shared storage on %s", mnode)
return False
g.log.debug("Create new group: %s on all slave nodes", group)
if not georep_groupadd(snodes, group):
g.log.error("Creating group: %s on all slave nodes failed", group)
return False
g.log.debug("Create user: %s in group: %s on all slave nodes", user, group)
if not georep_geoaccount(snodes, group, user):
g.log.error("Creating user: %s in group: %s on all slave nodes "
"failed", user, group)
return False
g.log.debug("Setting up mount broker root directory: %s node: %s",
mntbroker_dir, snodes[0])
ret, _, _ = georep_mountbroker_setup(snodes[0], group, mntbroker_dir)
if ret:
g.log.error("Setting up of mount broker directory failed: %s node: %s",
mntbroker_dir, snodes[0])
return False
g.log.debug("Add volume: %s and user: %s to mountbroker service",
slavevol, user)
ret, _, _ = georep_mountbroker_adduser(snodes[0], slavevol, user)
if ret:
g.log.error("Add volume: %s and user: %s to mountbroker "
"service failed", slavevol, user)
return False
g.log.debug("Checking mountbroker status")
ret, out, _ = georep_mountbroker_status(snodes[0])
if not ret:
if "not ok" in out:
g.log.error("Mountbroker status not ok")
return False
else:
g.log.error("Mountbroker status command failed")
return False
g.log.debug("Restart glusterd on all slave nodes")
if not restart_glusterd(snodes):
g.log.error("Restarting glusterd failed")
return False
g.log.debug("Set passwd for user account on slave")
if not georep_geoaccount_setpasswd(snodes, group, user, "geopasswd"):
g.log.error("Setting password failed on slaves")
return False
g.log.debug("Setup passwordless SSH between %s and %s", mnode, snodes[0])
if not georep_ssh_keygen(mnode):
g.log.error("ssh keygen is failed on %s", mnode)
return False
if not georep_ssh_copyid(mnode, snodes[0], user, "geopasswd"):
g.log.error("ssh copy-id is failed from %s to %s", mnode, snodes[0])
return False
return True
def georep_create_nonroot_session(mnode, mastervol, snode, slavevol, user,
force=False):
""" Create mountbroker/non-root geo-rep session
Args:
mnode (str) : Master node for session creation
mastervol (str) The name of the master volume
snode (str): Slave node for session creation
slavevol (str) The name of the slave volume
user (str): Specifies a user name
Returns:
bool: True if geo-rep session is created successfully
Else False
"""
g.log.debug("Create geo-rep pem keys")
ret, out, err = georep_createpem(mnode)
if ret:
g.log.error("Failed to create pem keys")
g.log.error("Error: out: %s \nerr: %s", out, err)
return False
g.log.debug("Create geo-rep session")
ret, out, err = georep_create(mnode, mastervol, snode, slavevol,
user, force)
if ret:
g.log.error("Failed to create geo-rep session")
g.log.error("Error: out: %s \nerr: %s", out, err)
return False
g.log.debug("Copy geo-rep pem keys onto all slave nodes")
ret, out, err = georep_set_pemkeys(snode, user, mastervol, slavevol)
if ret:
g.log.error("Failed to copy geo-rep pem keys onto all slave nodes")
g.log.error("Error: out:%s \nerr:%s", out, err)
return False
g.log.debug("Enable meta-volume")
ret, out, err = georep_config_set(mnode, mastervol, snode, slavevol,
"use_meta_volume", "true")
if ret:
g.log.error("Failed to set meta-volume")
g.log.error("Error: out: %s \nerr: %s", out, err)
return False
return True
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