120 lines
3.4 KiB
Python
120 lines
3.4 KiB
Python
''' General utilities for percona '''
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import subprocess
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from subprocess import Popen, PIPE
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import socket
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import os
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from charmhelpers.core.host import (
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lsb_release,
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)
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from charmhelpers.core.hookenv import (
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unit_get,
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relation_ids,
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related_units,
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relation_get,
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)
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from charmhelpers.fetch import (
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apt_install,
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filter_installed_packages
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)
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from mysql import get_mysql_root_password
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try:
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import jinja2
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except ImportError:
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apt_install(filter_installed_packages(['python-jinja2']),
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fatal=True)
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import jinja2
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try:
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import dns.resolver
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except ImportError:
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apt_install(filter_installed_packages(['python-dnspython']),
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fatal=True)
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import dns.resolver
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PACKAGES = [
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'percona-xtradb-cluster-server-5.5',
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'percona-xtradb-cluster-client-5.5',
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'python-mysqldb'
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]
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KEY = "keys/repo.percona.com"
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REPO = """deb http://repo.percona.com/apt {release} main
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deb-src http://repo.percona.com/apt {release} main"""
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MY_CNF = "/etc/mysql/my.cnf"
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SEEDED_MARKER = "/var/lib/mysql/seeded"
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def seeded():
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''' Check whether service unit is already seeded '''
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return os.path.exists(SEEDED_MARKER)
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def mark_seeded():
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''' Mark service unit as seeded '''
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with open(SEEDED_MARKER, 'w') as seeded:
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seeded.write('done')
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def setup_percona_repo():
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''' Configure service unit to use percona repositories '''
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with open('/etc/apt/sources.list.d/percona.list', 'w') as sources:
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sources.write(REPO.format(release=lsb_release()['DISTRIB_CODENAME']))
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subprocess.check_call(['apt-key', 'add', KEY])
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TEMPLATES_DIR = 'templates'
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def render_template(template_name, context, template_dir=TEMPLATES_DIR):
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templates = jinja2.Environment(
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loader=jinja2.FileSystemLoader(template_dir))
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template = templates.get_template(template_name)
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return template.render(context)
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def get_host_ip(hostname=None):
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hostname = hostname or unit_get('private-address')
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try:
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# Test to see if already an IPv4 address
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socket.inet_aton(hostname)
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return hostname
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except socket.error:
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# This may throw an NXDOMAIN exception; in which case
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# things are badly broken so just let it kill the hook
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answers = dns.resolver.query(hostname, 'A')
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if answers:
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return answers[0].address
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def get_cluster_hosts():
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hosts = [get_host_ip()]
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for relid in relation_ids('cluster'):
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for unit in related_units(relid):
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hosts.append(get_host_ip(relation_get('private-address',
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unit, relid)))
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return hosts
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SQL_SST_USER_SETUP = """mysql --user=root --password={} << EOF
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CREATE USER 'sstuser'@'localhost' IDENTIFIED BY 's3cretPass';
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GRANT RELOAD, LOCK TABLES, REPLICATION CLIENT ON *.* TO 'sstuser'@'localhost';
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EOF"""
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def configure_sstuser():
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subprocess.check_call(SQL_SST_USER_SETUP.format(get_mysql_root_password()),
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shell=True)
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# TODO: mysql charmhelper
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def configure_mysql_root_password():
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''' Configure debconf with root password '''
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dconf = Popen(['debconf-set-selections'], stdin=PIPE)
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package = "percona-server-server"
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root_pass = get_mysql_root_password()
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dconf.stdin.write("%s %s/root_password password %s\n" %
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(package, package, root_pass))
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dconf.stdin.write("%s %s/root_password_again password %s\n" %
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(package, package, root_pass))
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dconf.communicate()
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dconf.wait()
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