692 lines
24 KiB
Python
Executable File
692 lines
24 KiB
Python
Executable File
#!/usr/bin/python
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# TODO: Support changes to root and sstuser passwords
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import sys
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import json
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import os
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import socket
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import time
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from charmhelpers.core.hookenv import (
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Hooks, UnregisteredHookError,
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is_relation_made,
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log,
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local_unit,
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relation_get,
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relation_set,
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relation_id,
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relation_ids,
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related_units,
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unit_get,
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config,
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remote_unit,
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relation_type,
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DEBUG,
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INFO,
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WARNING,
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is_leader,
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network_get_primary_address,
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)
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from charmhelpers.core.host import (
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service,
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service_restart,
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service_start,
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file_hash,
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lsb_release,
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)
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from charmhelpers.core.templating import render
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from charmhelpers.fetch import (
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apt_update,
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apt_install,
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add_source,
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)
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from charmhelpers.contrib.peerstorage import (
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peer_echo,
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peer_store_and_set,
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peer_retrieve_by_prefix,
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)
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from charmhelpers.contrib.database.mysql import (
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PerconaClusterHelper,
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)
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from charmhelpers.contrib.hahelpers.cluster import (
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is_elected_leader,
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is_clustered,
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oldest_peer,
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DC_RESOURCE_NAME,
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peer_units,
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)
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from charmhelpers.payload.execd import execd_preinstall
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from charmhelpers.contrib.network.ip import (
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get_address_in_network,
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get_iface_for_address,
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get_netmask_for_address,
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get_ipv6_addr,
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is_address_in_network,
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resolve_network_cidr,
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)
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from charmhelpers.contrib.charmsupport import nrpe
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from charmhelpers.contrib.hardening.harden import harden
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from charmhelpers.contrib.hardening.mysql.checks import run_mysql_checks
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from charmhelpers.contrib.openstack.utils import (
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is_unit_paused_set,
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)
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from percona_utils import (
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determine_packages,
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setup_percona_repo,
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get_host_ip,
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get_cluster_hosts,
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configure_sstuser,
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configure_mysql_root_password,
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relation_clear,
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assert_charm_supports_ipv6,
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unit_sorted,
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get_db_helper,
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mark_seeded, seeded,
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install_mysql_ocf,
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is_sufficient_peers,
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notify_bootstrapped,
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is_bootstrapped,
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get_wsrep_value,
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assess_status,
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register_configs,
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resolve_cnf_file,
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create_binlogs_directory,
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)
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hooks = Hooks()
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RES_MONITOR_PARAMS = ('params user="sstuser" password="%(sstpass)s" '
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'pid="/var/run/mysqld/mysqld.pid" '
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'socket="/var/run/mysqld/mysqld.sock" '
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'max_slave_lag="5" '
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'cluster_type="pxc" '
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'op monitor interval="1s" timeout="30s" '
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'OCF_CHECK_LEVEL="1"')
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@hooks.hook('install.real')
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@harden()
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def install():
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execd_preinstall()
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if config('source') is None and \
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lsb_release()['DISTRIB_CODENAME'] < 'trusty':
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setup_percona_repo()
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elif config('source') is not None:
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add_source(config('source'), config('key'))
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configure_mysql_root_password(config('root-password'))
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apt_update(fatal=True)
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apt_install(determine_packages(), fatal=True)
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configure_sstuser(config('sst-password'))
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if config('harden') and 'mysql' in config('harden'):
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run_mysql_checks()
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def render_config(clustered=False, hosts=[]):
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if not os.path.exists(os.path.dirname(resolve_cnf_file())):
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os.makedirs(os.path.dirname(resolve_cnf_file()))
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context = {
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'cluster_name': 'juju_cluster',
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'private_address': get_host_ip(),
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'clustered': clustered,
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'cluster_hosts': ",".join(hosts),
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'sst_method': config('sst-method'),
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'sst_password': config('sst-password'),
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'innodb_file_per_table': config('innodb-file-per-table'),
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'table_open_cache': config('table-open-cache'),
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'lp1366997_workaround': config('lp1366997-workaround'),
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'binlogs_path': config('binlogs-path'),
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'enable_binlogs': config('enable-binlogs'),
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'binlogs_max_size': config('binlogs-max-size'),
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'binlogs_expire_days': config('binlogs-expire-days'),
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}
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if config('prefer-ipv6'):
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# NOTE(hopem): this is a kludge to get percona working with ipv6.
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# See lp 1380747 for more info. This is intended as a stop gap until
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# percona package is fixed to support ipv6.
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context['bind_address'] = '::'
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context['wsrep_provider_options'] = 'gmcast.listen_addr=tcp://:::4567;'
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context['ipv6'] = True
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else:
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context['ipv6'] = False
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context.update(PerconaClusterHelper().parse_config())
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render(os.path.basename(resolve_cnf_file()),
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resolve_cnf_file(), context, perms=0o444)
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def render_config_restart_on_changed(clustered, hosts, bootstrap=False):
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"""Render mysql config and restart mysql service if file changes as a
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result.
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If bootstrap is True we do a bootstrap-pxc in order to bootstrap the
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percona cluster. This should only be performed once at cluster creation
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time.
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If percona is already bootstrapped we can get away with just ensuring that
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it is started so long as the new node to be added is guaranteed to have
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been restarted so as to apply the new config.
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"""
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pre_hash = file_hash(resolve_cnf_file())
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render_config(clustered, hosts)
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create_binlogs_directory()
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update_db_rels = False
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if file_hash(resolve_cnf_file()) != pre_hash or bootstrap:
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if bootstrap:
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service('stop', 'mysql')
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service('bootstrap-pxc', 'mysql')
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# NOTE(dosaboy): this will not actually do anything if no cluster
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# relation id exists yet.
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notify_bootstrapped()
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update_db_rels = True
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else:
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delay = 1
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attempts = 0
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max_retries = 5
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# NOTE(dosaboy): avoid unnecessary restarts. Once mysql is started
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# it needn't be restarted when new units join the cluster since the
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# new units will join and apply their own config.
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if not seeded():
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action = service_restart
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else:
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action = service_start
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while not action('mysql'):
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if attempts == max_retries:
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raise Exception("Failed to start mysql (max retries "
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"reached)")
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log("Failed to start mysql - retrying in %ss" % (delay),
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WARNING)
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time.sleep(delay)
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delay += 2
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attempts += 1
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# If we get here we assume prior actions have succeeded to always
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# this unit is marked as seeded so that subsequent calls don't result
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# in a restart.
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mark_seeded()
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if update_db_rels:
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update_shared_db_rels()
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else:
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log("Config file '%s' unchanged", level=DEBUG)
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def update_shared_db_rels():
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for r_id in relation_ids('shared-db'):
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for unit in related_units(r_id):
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shared_db_changed(r_id, unit)
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@hooks.hook('upgrade-charm')
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@harden()
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def upgrade():
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check_bootstrap = False
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try:
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if is_leader():
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check_bootstrap = True
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except:
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if oldest_peer(peer_units()):
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check_bootstrap = True
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if check_bootstrap and not is_bootstrapped() and is_sufficient_peers():
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# If this is the leader but we have not yet broadcast the cluster uuid
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# then do so now.
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wsrep_ready = get_wsrep_value('wsrep_ready') or ""
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if wsrep_ready.lower() in ['on', 'ready']:
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cluster_state_uuid = get_wsrep_value('wsrep_cluster_state_uuid')
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if cluster_state_uuid:
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mark_seeded()
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notify_bootstrapped(cluster_uuid=cluster_state_uuid)
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config_changed()
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@hooks.hook('config-changed')
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@harden()
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def config_changed():
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# if we are paused, delay doing any config changed hooks. It is forced on
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# the resume.
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if is_unit_paused_set():
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return
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if config('prefer-ipv6'):
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assert_charm_supports_ipv6()
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hosts = get_cluster_hosts()
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clustered = len(hosts) > 1
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bootstrapped = is_bootstrapped()
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# NOTE: only configure the cluster if we have sufficient peers. This only
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# applies if min-cluster-size is provided and is used to avoid extraneous
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# configuration changes and premature bootstrapping as the cluster is
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# deployed.
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if is_sufficient_peers():
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try:
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# NOTE(jamespage): try with leadership election
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if is_leader():
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log("Leader unit - bootstrap required=%s" % (not bootstrapped),
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DEBUG)
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render_config_restart_on_changed(clustered, hosts,
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bootstrap=not bootstrapped)
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elif bootstrapped:
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log("Cluster is bootstrapped - configuring mysql on this node",
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DEBUG)
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render_config_restart_on_changed(clustered, hosts)
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else:
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log("Not configuring", DEBUG)
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except NotImplementedError:
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# NOTE(jamespage): fallback to legacy behaviour.
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oldest = oldest_peer(peer_units())
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if oldest:
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log("Leader unit - bootstrap required=%s" % (not bootstrapped),
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DEBUG)
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render_config_restart_on_changed(clustered, hosts,
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bootstrap=not bootstrapped)
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elif bootstrapped:
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log("Cluster is bootstrapped - configuring mysql on this node",
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DEBUG)
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render_config_restart_on_changed(clustered, hosts)
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else:
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log("Not configuring", DEBUG)
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# Notify any changes to the access network
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update_shared_db_rels()
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# (re)install pcmkr agent
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install_mysql_ocf()
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if relation_ids('ha'):
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# make sure all the HA resources are (re)created
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ha_relation_joined()
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if is_relation_made('nrpe-external-master'):
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update_nrpe_config()
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@hooks.hook('cluster-relation-joined')
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def cluster_joined():
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if config('prefer-ipv6'):
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addr = get_ipv6_addr(exc_list=[config('vip')])[0]
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relation_settings = {'private-address': addr,
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'hostname': socket.gethostname()}
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log("Setting cluster relation: '%s'" % (relation_settings),
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level=INFO)
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relation_set(relation_settings=relation_settings)
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# Ensure all new peers are aware
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cluster_state_uuid = relation_get('bootstrap-uuid', unit=local_unit())
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if cluster_state_uuid:
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notify_bootstrapped(cluster_rid=relation_id(),
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cluster_uuid=cluster_state_uuid)
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@hooks.hook('cluster-relation-departed')
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@hooks.hook('cluster-relation-changed')
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def cluster_changed():
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# Need to make sure hostname is excluded to build inclusion list (paying
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# attention to those excluded by default in peer_echo().
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# TODO(dosaboy): extend peer_echo() to support providing exclusion list as
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# well as inclusion list.
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# NOTE(jamespage): deprecated - leader-election
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rdata = relation_get()
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inc_list = []
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for attr in rdata.iterkeys():
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if attr not in ['hostname', 'private-address', 'public-address']:
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inc_list.append(attr)
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peer_echo(includes=inc_list)
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# NOTE(jamespage): deprecated - leader-election
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config_changed()
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# TODO: This could be a hook common between mysql and percona-cluster
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@hooks.hook('db-relation-changed')
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@hooks.hook('db-admin-relation-changed')
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def db_changed(relation_id=None, unit=None, admin=None):
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if not is_elected_leader(DC_RESOURCE_NAME):
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log('Service is peered, clearing db relation'
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' as this service unit is not the leader')
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relation_clear(relation_id)
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return
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if is_clustered():
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db_host = config('vip')
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else:
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if config('prefer-ipv6'):
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db_host = get_ipv6_addr(exc_list=[config('vip')])[0]
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else:
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db_host = unit_get('private-address')
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if admin not in [True, False]:
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admin = relation_type() == 'db-admin'
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db_name, _ = remote_unit().split("/")
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username = db_name
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db_helper = get_db_helper()
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addr = relation_get('private-address', unit=unit, rid=relation_id)
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password = db_helper.configure_db(addr, db_name, username, admin=admin)
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relation_set(relation_id=relation_id,
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relation_settings={
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'user': username,
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'password': password,
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'host': db_host,
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'database': db_name,
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})
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def get_db_host(client_hostname, interface='shared-db'):
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"""Get address of local database host.
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If an access-network has been configured, expect selected address to be
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on that network. If none can be found, revert to primary address.
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If network spaces are supported (Juju >= 2.0), use network-get to
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retrieve the network binding for the interface.
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If vip(s) are configured, chooses first available.
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"""
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vips = config('vip').split() if config('vip') else []
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access_network = config('access-network')
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client_ip = get_host_ip(client_hostname)
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if access_network:
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if is_address_in_network(access_network, client_ip):
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if is_clustered():
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for vip in vips:
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if is_address_in_network(access_network, vip):
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return vip
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log("Unable to identify a VIP in the access-network '%s'" %
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(access_network), level=WARNING)
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else:
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return get_address_in_network(access_network)
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else:
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log("Client address '%s' not in access-network '%s'" %
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(client_ip, access_network), level=WARNING)
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else:
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try:
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# NOTE(jamespage)
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# Try to use network spaces to resolve binding for
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# interface, and to resolve the VIP associated with
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# the binding if provided.
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interface_binding = network_get_primary_address(interface)
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if is_clustered() and vips:
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interface_cidr = resolve_network_cidr(interface_binding)
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for vip in vips:
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if is_address_in_network(interface_cidr, vip):
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return vip
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return interface_binding
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except NotImplementedError:
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# NOTE(jamespage): skip - fallback to previous behaviour
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pass
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if is_clustered() and vips:
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return vips[0] # NOTE on private network
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if config('prefer-ipv6'):
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return get_ipv6_addr(exc_list=vips)[0]
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return unit_get('private-address')
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def configure_db_for_hosts(hosts, database, username, db_helper):
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"""Hosts may be a json-encoded list of hosts or a single hostname."""
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try:
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hosts = json.loads(hosts)
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log("Multiple hostnames provided by relation: %s" % (', '.join(hosts)),
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level=DEBUG)
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except ValueError:
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log("Single hostname provided by relation: %s" % (hosts),
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level=DEBUG)
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hosts = [hosts]
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for host in hosts:
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password = db_helper.configure_db(host, database, username)
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return password
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# TODO: This could be a hook common between mysql and percona-cluster
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@hooks.hook('shared-db-relation-changed')
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def shared_db_changed(relation_id=None, unit=None):
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if not seeded():
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log("Percona cluster not yet bootstrapped - deferring shared-db rel "
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"until bootstrapped", DEBUG)
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return
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if not is_elected_leader(DC_RESOURCE_NAME):
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# NOTE(jamespage): relation level data candidate
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log('Service is peered, clearing shared-db relation '
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'as this service unit is not the leader')
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relation_clear(relation_id)
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# Each unit needs to set the db information otherwise if the unit
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# with the info dies the settings die with it Bug# 1355848
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if is_relation_made('cluster'):
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for rel_id in relation_ids('shared-db'):
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peerdb_settings = \
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peer_retrieve_by_prefix(rel_id, exc_list=['hostname'])
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passwords = [key for key in peerdb_settings.keys()
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if 'password' in key.lower()]
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if len(passwords) > 0:
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relation_set(relation_id=rel_id, **peerdb_settings)
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return
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settings = relation_get(unit=unit, rid=relation_id)
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access_network = config('access-network')
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db_helper = get_db_helper()
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peer_store_and_set(relation_id=relation_id,
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relation_settings={'access-network': access_network})
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singleset = set(['database', 'username', 'hostname'])
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if singleset.issubset(settings):
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# Process a single database configuration
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hostname = settings['hostname']
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database = settings['database']
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username = settings['username']
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normalized_address = get_host_ip(hostname)
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if access_network and not is_address_in_network(access_network,
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normalized_address):
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# NOTE: for configurations using access-network, only setup
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# database access if remote unit has presented a
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# hostname or ip address thats within the configured
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# network cidr
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log("Host '%s' not in access-network '%s' - ignoring" %
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(normalized_address, access_network), level=INFO)
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return
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# NOTE: do this before querying access grants
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password = configure_db_for_hosts(hostname, database, username,
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db_helper)
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allowed_units = db_helper.get_allowed_units(database, username,
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relation_id=relation_id)
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allowed_units = unit_sorted(allowed_units)
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allowed_units = ' '.join(allowed_units)
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relation_set(relation_id=relation_id, allowed_units=allowed_units)
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db_host = get_db_host(hostname)
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|
peer_store_and_set(relation_id=relation_id,
|
|
db_host=db_host,
|
|
password=password)
|
|
else:
|
|
# Process multiple database setup requests.
|
|
# from incoming relation data:
|
|
# nova_database=xxx nova_username=xxx nova_hostname=xxx
|
|
# quantum_database=xxx quantum_username=xxx quantum_hostname=xxx
|
|
# create
|
|
# {
|
|
# "nova": {
|
|
# "username": xxx,
|
|
# "database": xxx,
|
|
# "hostname": xxx
|
|
# },
|
|
# "quantum": {
|
|
# "username": xxx,
|
|
# "database": xxx,
|
|
# "hostname": xxx
|
|
# }
|
|
# }
|
|
#
|
|
databases = {}
|
|
for k, v in settings.iteritems():
|
|
db = k.split('_')[0]
|
|
x = '_'.join(k.split('_')[1:])
|
|
if db not in databases:
|
|
databases[db] = {}
|
|
databases[db][x] = v
|
|
|
|
allowed_units = {}
|
|
return_data = {}
|
|
for db in databases:
|
|
if singleset.issubset(databases[db]):
|
|
database = databases[db]['database']
|
|
hostname = databases[db]['hostname']
|
|
username = databases[db]['username']
|
|
|
|
normalized_address = get_host_ip(hostname)
|
|
if (access_network and
|
|
not is_address_in_network(access_network,
|
|
normalized_address)):
|
|
# NOTE: for configurations using access-network,
|
|
# only setup database access if remote unit
|
|
# has presented a hostname or ip address
|
|
# thats within the configured network cidr
|
|
return
|
|
|
|
# NOTE: do this before querying access grants
|
|
password = configure_db_for_hosts(hostname, database, username,
|
|
db_helper)
|
|
|
|
a_units = db_helper.get_allowed_units(database, username,
|
|
relation_id=relation_id)
|
|
a_units = ' '.join(unit_sorted(a_units))
|
|
allowed_units['%s_allowed_units' % (db)] = a_units
|
|
|
|
return_data['%s_password' % (db)] = password
|
|
db_host = get_db_host(hostname)
|
|
|
|
if allowed_units:
|
|
relation_set(relation_id=relation_id, **allowed_units)
|
|
else:
|
|
log("No allowed_units - not setting relation settings",
|
|
level=DEBUG)
|
|
|
|
if return_data:
|
|
peer_store_and_set(relation_id=relation_id, db_host=db_host,
|
|
**return_data)
|
|
else:
|
|
log("No return data - not setting relation settings", level=DEBUG)
|
|
|
|
|
|
@hooks.hook('ha-relation-joined')
|
|
def ha_relation_joined():
|
|
vip = config('vip')
|
|
vip_iface = get_iface_for_address(vip) or config('vip_iface')
|
|
vip_cidr = get_netmask_for_address(vip) or config('vip_cidr')
|
|
corosync_bindiface = config('ha-bindiface')
|
|
corosync_mcastport = config('ha-mcastport')
|
|
|
|
if None in [vip, vip_cidr, vip_iface]:
|
|
log('Insufficient VIP information to configure cluster')
|
|
sys.exit(1)
|
|
|
|
if config('prefer-ipv6'):
|
|
res_mysql_vip = 'ocf:heartbeat:IPv6addr'
|
|
vip_params = 'params ipv6addr="%s" cidr_netmask="%s" nic="%s"' % \
|
|
(vip, vip_cidr, vip_iface)
|
|
else:
|
|
res_mysql_vip = 'ocf:heartbeat:IPaddr2'
|
|
vip_params = 'params ip="%s" cidr_netmask="%s" nic="%s"' % \
|
|
(vip, vip_cidr, vip_iface)
|
|
|
|
resources = {'res_mysql_vip': res_mysql_vip,
|
|
'res_mysql_monitor': 'ocf:percona:mysql_monitor'}
|
|
|
|
sstpsswd = config('sst-password')
|
|
resource_params = {'res_mysql_vip': vip_params,
|
|
'res_mysql_monitor':
|
|
RES_MONITOR_PARAMS % {'sstpass': sstpsswd}}
|
|
groups = {'grp_percona_cluster': 'res_mysql_vip'}
|
|
|
|
clones = {'cl_mysql_monitor': 'res_mysql_monitor meta interleave=true'}
|
|
|
|
colocations = {'vip_mysqld': 'inf: grp_percona_cluster cl_mysql_monitor'}
|
|
|
|
locations = {'loc_percona_cluster':
|
|
'grp_percona_cluster rule inf: writable eq 1'}
|
|
|
|
for rel_id in relation_ids('ha'):
|
|
relation_set(relation_id=rel_id,
|
|
corosync_bindiface=corosync_bindiface,
|
|
corosync_mcastport=corosync_mcastport,
|
|
resources=resources,
|
|
resource_params=resource_params,
|
|
groups=groups,
|
|
clones=clones,
|
|
colocations=colocations,
|
|
locations=locations)
|
|
|
|
|
|
@hooks.hook('ha-relation-changed')
|
|
def ha_relation_changed():
|
|
clustered = relation_get('clustered')
|
|
if (clustered and is_elected_leader(DC_RESOURCE_NAME)):
|
|
log('Cluster configured, notifying other services')
|
|
# Tell all related services to start using the VIP
|
|
update_shared_db_rels()
|
|
for r_id in relation_ids('db'):
|
|
for unit in related_units(r_id):
|
|
db_changed(r_id, unit, admin=False)
|
|
for r_id in relation_ids('db-admin'):
|
|
for unit in related_units(r_id):
|
|
db_changed(r_id, unit, admin=True)
|
|
|
|
|
|
@hooks.hook('leader-settings-changed')
|
|
def leader_settings_changed():
|
|
# Notify any changes to data in leader storage
|
|
update_shared_db_rels()
|
|
|
|
|
|
@hooks.hook('nrpe-external-master-relation-joined',
|
|
'nrpe-external-master-relation-changed')
|
|
def update_nrpe_config():
|
|
# python-dbus is used by check_upstart_job
|
|
apt_install('python-dbus')
|
|
hostname = nrpe.get_nagios_hostname()
|
|
current_unit = nrpe.get_nagios_unit_name()
|
|
nrpe_setup = nrpe.NRPE(hostname=hostname)
|
|
nrpe.add_init_service_checks(nrpe_setup, 'mysql', current_unit)
|
|
nrpe_setup.add_check(
|
|
shortname='mysql_proc',
|
|
description='Check MySQL process {%s}' % current_unit,
|
|
check_cmd='check_procs -c 1:1 -C mysqld'
|
|
)
|
|
nrpe_setup.write()
|
|
|
|
|
|
@hooks.hook('update-status')
|
|
@harden()
|
|
def update_status():
|
|
log('Updating status.')
|
|
|
|
|
|
def main():
|
|
try:
|
|
hooks.execute(sys.argv)
|
|
except UnregisteredHookError as e:
|
|
log('Unknown hook {} - skipping.'.format(e))
|
|
assess_status(register_configs())
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|