265 lines
8.2 KiB
Python
Executable File
265 lines
8.2 KiB
Python
Executable File
#!/usr/bin/env python3
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import os
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import sys
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import subprocess
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import traceback
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from time import gmtime, strftime
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import MySQLdb
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_path = os.path.dirname(os.path.realpath(__file__))
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_hooks = os.path.abspath(os.path.join(_path, '../hooks'))
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_root = os.path.abspath(os.path.join(_path, '..'))
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def _add_path(path):
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if path not in sys.path:
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sys.path.insert(1, path)
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_add_path(_hooks)
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_add_path(_root)
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from charmhelpers.core.hookenv import (
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action_get,
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action_set,
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action_fail,
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relation_ids,
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relation_set,
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leader_set,
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is_leader,
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)
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from charmhelpers.core.host import (
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CompareHostReleases,
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lsb_release,
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pwgen,
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)
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from charmhelpers.contrib.openstack.utils import (
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DB_SERIES_UPGRADING_KEY,
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)
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import percona_utils
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import percona_hooks
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def pause(args):
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"""Pause the MySQL service.
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@raises Exception should the service fail to stop.
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"""
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percona_utils.pause_unit_helper(percona_utils.register_configs())
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def resume(args):
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"""Resume the MySQL service.
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@raises Exception should the service fail to start.
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"""
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percona_utils.resume_unit_helper(percona_utils.register_configs())
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# NOTE(ajkavanagh) - we force a config_changed pseudo-hook to see if the
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# unit needs to bootstrap or restart it's services here.
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percona_hooks.config_changed()
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def complete_cluster_series_upgrade(args):
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""" Complete the series upgrade process
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After all nodes have been upgraded, this action is run to inform the whole
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cluster the upgrade is done. Config files will be re-rendered with each
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peer in the wsrep_cluster_address config.
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"""
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if is_leader():
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# Unset cluster_series_upgrading
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leader_set(cluster_series_upgrading="")
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leader_set(cluster_series_upgrade_leader="")
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for r_id in relation_ids('shared-db'):
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relation_set(
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relation_id=r_id,
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relation_settings={DB_SERIES_UPGRADING_KEY: None})
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percona_hooks.config_changed()
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def backup(args):
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basedir = (action_get("basedir")).lower()
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compress = action_get("compress")
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incremental = action_get("incremental")
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sstpw = percona_utils._get_password("sst-password")
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optionlist = []
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# innobackupex will not create recursive dirs that do not already exist,
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# so help it along
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if not os.path.exists(basedir):
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os.makedirs(basedir)
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# Build a list of options to pass to innobackupex
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if compress:
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optionlist.append("--compress")
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if incremental:
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optionlist.append("--incremental")
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# xtrabackup 2.4 (introduced in Bionic) doesn't support compact backups
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if CompareHostReleases(lsb_release()['DISTRIB_CODENAME']) < 'bionic':
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optionlist.append("--compact")
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try:
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subprocess.check_call(
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['innobackupex', '--galera-info', '--rsync', basedir,
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'--user=sstuser', '--password={}'.format(sstpw)] + optionlist)
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action_set({
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'time-completed': (strftime("%Y-%m-%d %H:%M:%S", gmtime())),
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'outcome': 'Success'}
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)
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except subprocess.CalledProcessError as e:
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action_set({
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'time-completed': (strftime("%Y-%m-%d %H:%M:%S", gmtime())),
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'output': e.output,
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'return-code': e.returncode,
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'traceback': traceback.format_exc()})
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action_fail("innobackupex failed, you should log on to the unit"
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"and check the status of the database")
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def bootstrap_pxc(args):
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""" Force a bootstrap on this node
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This action will run bootstrap-pxc on this node bootstrapping the cluster.
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This action should only be run after a cold start requiring a bootstrap.
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This action should only be run on the node with the highest sequence number
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as displayed in workgoup status and found in grastate.dat.
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If this unit has the highest sequence number and is not the juju leader
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node, a subsequent action run of notify-bootstrapped is required.
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"""
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try:
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# Force safe to bootstrap
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percona_utils.set_grastate_safe_to_bootstrap()
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# Boostrap this node
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percona_utils.bootstrap_pxc()
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percona_utils.notify_bootstrapped()
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except (percona_utils.GRAStateFileNotFound, OSError) as e:
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action_set({
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'output': e.output,
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'return-code': e.returncode})
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action_fail("The GRAState file does not exist or cannot "
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"be written to.")
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except (subprocess.CalledProcessError, Exception) as e:
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action_set({
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'output': e.output,
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'return-code': e.returncode,
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'traceback': traceback.format_exc()})
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action_fail("The bootstrap-pxc failed. "
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"See traceback in show-action-output")
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action_set({
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'output': "Bootstrap succeeded. "
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"Wait for the other units to run update-status"})
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percona_utils.assess_status(percona_utils.register_configs())
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def notify_bootstrapped(args):
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"""Notify the cluster of the new bootstrap cluster UUID.
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As a consequence of timing, this action will often need to be executed
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after the bootstrap-pxc action. It will need to be run on a different unit
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than was bootstrap-pxc was executed on.
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"""
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percona_utils.notify_bootstrapped()
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def set_pxc_strict_mode(args):
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"""Set PXC Strict Mode.
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"""
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mode = action_get("mode")
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try:
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percona_utils.set_pxc_strict_mode(mode)
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action_set({"outcome": "Success"})
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except (MySQLdb.OperationalError, ValueError) as e:
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action_set({
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"output": ", ".join(e.args),
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"traceback": traceback.format_exc()})
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action_fail("Setting PXC strict mode {} failed"
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.format(mode))
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def mysqldump(args):
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"""Execute a mysqldump backup.
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Execute mysqldump of the database(s). The mysqldump action will take
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in the databases action parameter. If the databases parameter is unset all
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databases will be dumped, otherwise only the named databases will be
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dumped. The action will use the basedir action parameter to dump the
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database into the base directory.
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A successful mysqldump backup will set the action results key,
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mysqldump-file, with the full path to the dump file.
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:param args: sys.argv
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:type args: sys.argv
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:side effect: Calls instance.mysqldump
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:returns: This function is called for its side effect
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:rtype: None
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:action param basedir: Base directory to dump the db(s)
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:action param databases: Comma separated string of databases
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:action return:
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"""
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basedir = action_get("basedir")
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databases = action_get("databases")
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try:
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filename = percona_utils.mysqldump(basedir, databases=databases)
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action_set({
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"mysqldump-file": filename,
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"outcome": "Success"}
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)
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except subprocess.CalledProcessError as e:
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action_set({
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"output": e.output,
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"return-code": e.returncode,
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"traceback": traceback.format_exc()})
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action_fail("mysqldump failed")
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def generate_nagios_password(args):
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"""Regenerate nagios password."""
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if is_leader():
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leader_set({"nagios-password": pwgen()})
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percona_utils.set_nagios_user()
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action_set({"output": "New password for nagios created successfully."})
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else:
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action_fail("This action should only take place on the leader unit.")
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# A dictionary of all the defined actions to callables (which take
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# parsed arguments).
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ACTIONS = {"pause": pause, "resume": resume, "backup": backup,
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"complete-cluster-series-upgrade": complete_cluster_series_upgrade,
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"bootstrap-pxc": bootstrap_pxc,
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"notify-bootstrapped": notify_bootstrapped,
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"set-pxc-strict-mode": set_pxc_strict_mode,
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"mysqldump": mysqldump,
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"generate-nagios-password": generate_nagios_password}
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def main(args):
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action_name = os.path.basename(args[0])
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try:
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action = ACTIONS[action_name]
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except KeyError:
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s = "Action {} undefined".format(action_name)
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action_fail(s)
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return s
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else:
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try:
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action(args)
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except Exception as e:
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action_fail("Action {} failed: {}".format(action_name, str(e)))
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if __name__ == "__main__":
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sys.exit(main(sys.argv))
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