366 lines
10 KiB
Python
366 lines
10 KiB
Python
#!/usr/bin/python
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# Common python helper functions used for OpenStack charms.
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from collections import OrderedDict
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import apt_pkg as apt
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import subprocess
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import os
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import socket
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import sys
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from charmhelpers.core.hookenv import (
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config,
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log as juju_log,
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charm_dir,
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)
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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.fetch import (
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apt_install,
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)
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CLOUD_ARCHIVE_URL = "http://ubuntu-cloud.archive.canonical.com/ubuntu"
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CLOUD_ARCHIVE_KEY_ID = '5EDB1B62EC4926EA'
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UBUNTU_OPENSTACK_RELEASE = OrderedDict([
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('oneiric', 'diablo'),
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('precise', 'essex'),
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('quantal', 'folsom'),
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('raring', 'grizzly'),
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('saucy', 'havana'),
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])
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OPENSTACK_CODENAMES = OrderedDict([
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('2011.2', 'diablo'),
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('2012.1', 'essex'),
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('2012.2', 'folsom'),
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('2013.1', 'grizzly'),
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('2013.2', 'havana'),
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('2014.1', 'icehouse'),
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])
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# The ugly duckling
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SWIFT_CODENAMES = OrderedDict([
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('1.4.3', 'diablo'),
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('1.4.8', 'essex'),
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('1.7.4', 'folsom'),
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('1.8.0', 'grizzly'),
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('1.7.7', 'grizzly'),
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('1.7.6', 'grizzly'),
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('1.10.0', 'havana'),
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('1.9.1', 'havana'),
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('1.9.0', 'havana'),
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])
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def error_out(msg):
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juju_log("FATAL ERROR: %s" % msg, level='ERROR')
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sys.exit(1)
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def get_os_codename_install_source(src):
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'''Derive OpenStack release codename from a given installation source.'''
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ubuntu_rel = lsb_release()['DISTRIB_CODENAME']
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rel = ''
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if src == 'distro':
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try:
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rel = UBUNTU_OPENSTACK_RELEASE[ubuntu_rel]
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except KeyError:
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e = 'Could not derive openstack release for '\
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'this Ubuntu release: %s' % ubuntu_rel
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error_out(e)
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return rel
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if src.startswith('cloud:'):
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ca_rel = src.split(':')[1]
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ca_rel = ca_rel.split('%s-' % ubuntu_rel)[1].split('/')[0]
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return ca_rel
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# Best guess match based on deb string provided
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if src.startswith('deb') or src.startswith('ppa'):
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for k, v in OPENSTACK_CODENAMES.iteritems():
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if v in src:
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return v
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def get_os_version_install_source(src):
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codename = get_os_codename_install_source(src)
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return get_os_version_codename(codename)
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def get_os_codename_version(vers):
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'''Determine OpenStack codename from version number.'''
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try:
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return OPENSTACK_CODENAMES[vers]
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except KeyError:
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e = 'Could not determine OpenStack codename for version %s' % vers
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error_out(e)
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def get_os_version_codename(codename):
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'''Determine OpenStack version number from codename.'''
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for k, v in OPENSTACK_CODENAMES.iteritems():
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if v == codename:
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return k
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e = 'Could not derive OpenStack version for '\
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'codename: %s' % codename
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error_out(e)
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def get_os_codename_package(package, fatal=True):
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'''Derive OpenStack release codename from an installed package.'''
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apt.init()
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cache = apt.Cache()
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try:
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pkg = cache[package]
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except:
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if not fatal:
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return None
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# the package is unknown to the current apt cache.
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e = 'Could not determine version of package with no installation '\
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'candidate: %s' % package
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error_out(e)
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if not pkg.current_ver:
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if not fatal:
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return None
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# package is known, but no version is currently installed.
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e = 'Could not determine version of uninstalled package: %s' % package
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error_out(e)
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vers = apt.upstream_version(pkg.current_ver.ver_str)
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try:
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if 'swift' in pkg.name:
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swift_vers = vers[:5]
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if swift_vers not in SWIFT_CODENAMES:
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# Deal with 1.10.0 upward
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swift_vers = vers[:6]
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return SWIFT_CODENAMES[swift_vers]
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else:
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vers = vers[:6]
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return OPENSTACK_CODENAMES[vers]
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except KeyError:
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e = 'Could not determine OpenStack codename for version %s' % vers
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error_out(e)
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def get_os_version_package(pkg, fatal=True):
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'''Derive OpenStack version number from an installed package.'''
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codename = get_os_codename_package(pkg, fatal=fatal)
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if not codename:
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return None
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if 'swift' in pkg:
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vers_map = SWIFT_CODENAMES
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else:
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vers_map = OPENSTACK_CODENAMES
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for version, cname in vers_map.iteritems():
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if cname == codename:
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return version
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#e = "Could not determine OpenStack version for package: %s" % pkg
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#error_out(e)
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os_rel = None
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def os_release(package, base='essex'):
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'''
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Returns OpenStack release codename from a cached global.
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If the codename can not be determined from either an installed package or
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the installation source, the earliest release supported by the charm should
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be returned.
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'''
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global os_rel
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if os_rel:
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return os_rel
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os_rel = (get_os_codename_package(package, fatal=False) or
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get_os_codename_install_source(config('openstack-origin')) or
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base)
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return os_rel
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def import_key(keyid):
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cmd = "apt-key adv --keyserver keyserver.ubuntu.com " \
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"--recv-keys %s" % keyid
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try:
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subprocess.check_call(cmd.split(' '))
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except subprocess.CalledProcessError:
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error_out("Error importing repo key %s" % keyid)
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def configure_installation_source(rel):
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'''Configure apt installation source.'''
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if rel == 'distro':
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return
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elif rel[:4] == "ppa:":
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src = rel
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subprocess.check_call(["add-apt-repository", "-y", src])
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elif rel[:3] == "deb":
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l = len(rel.split('|'))
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if l == 2:
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src, key = rel.split('|')
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juju_log("Importing PPA key from keyserver for %s" % src)
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import_key(key)
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elif l == 1:
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src = rel
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with open('/etc/apt/sources.list.d/juju_deb.list', 'w') as f:
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f.write(src)
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elif rel[:6] == 'cloud:':
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ubuntu_rel = lsb_release()['DISTRIB_CODENAME']
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rel = rel.split(':')[1]
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u_rel = rel.split('-')[0]
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ca_rel = rel.split('-')[1]
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if u_rel != ubuntu_rel:
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e = 'Cannot install from Cloud Archive pocket %s on this Ubuntu '\
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'version (%s)' % (ca_rel, ubuntu_rel)
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error_out(e)
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if 'staging' in ca_rel:
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# staging is just a regular PPA.
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os_rel = ca_rel.split('/')[0]
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ppa = 'ppa:ubuntu-cloud-archive/%s-staging' % os_rel
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cmd = 'add-apt-repository -y %s' % ppa
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subprocess.check_call(cmd.split(' '))
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return
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# map charm config options to actual archive pockets.
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pockets = {
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'folsom': 'precise-updates/folsom',
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'folsom/updates': 'precise-updates/folsom',
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'folsom/proposed': 'precise-proposed/folsom',
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'grizzly': 'precise-updates/grizzly',
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'grizzly/updates': 'precise-updates/grizzly',
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'grizzly/proposed': 'precise-proposed/grizzly',
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'havana': 'precise-updates/havana',
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'havana/updates': 'precise-updates/havana',
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'havana/proposed': 'precise-proposed/havana',
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}
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try:
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pocket = pockets[ca_rel]
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except KeyError:
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e = 'Invalid Cloud Archive release specified: %s' % rel
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error_out(e)
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src = "deb %s %s main" % (CLOUD_ARCHIVE_URL, pocket)
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apt_install('ubuntu-cloud-keyring', fatal=True)
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with open('/etc/apt/sources.list.d/cloud-archive.list', 'w') as f:
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f.write(src)
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else:
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error_out("Invalid openstack-release specified: %s" % rel)
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def save_script_rc(script_path="scripts/scriptrc", **env_vars):
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"""
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Write an rc file in the charm-delivered directory containing
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exported environment variables provided by env_vars. Any charm scripts run
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outside the juju hook environment can source this scriptrc to obtain
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updated config information necessary to perform health checks or
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service changes.
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"""
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juju_rc_path = "%s/%s" % (charm_dir(), script_path)
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if not os.path.exists(os.path.dirname(juju_rc_path)):
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os.mkdir(os.path.dirname(juju_rc_path))
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with open(juju_rc_path, 'wb') as rc_script:
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rc_script.write(
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"#!/bin/bash\n")
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[rc_script.write('export %s=%s\n' % (u, p))
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for u, p in env_vars.iteritems() if u != "script_path"]
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def openstack_upgrade_available(package):
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"""
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Determines if an OpenStack upgrade is available from installation
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source, based on version of installed package.
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:param package: str: Name of installed package.
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:returns: bool: : Returns True if configured installation source offers
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a newer version of package.
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"""
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src = config('openstack-origin')
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cur_vers = get_os_version_package(package)
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available_vers = get_os_version_install_source(src)
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apt.init()
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return apt.version_compare(available_vers, cur_vers) == 1
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def is_ip(address):
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"""
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Returns True if address is a valid IP address.
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"""
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try:
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# Test to see if already an IPv4 address
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socket.inet_aton(address)
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return True
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except socket.error:
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return False
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def ns_query(address):
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try:
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import dns.resolver
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except ImportError:
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apt_install('python-dnspython')
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import dns.resolver
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if isinstance(address, dns.name.Name):
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rtype = 'PTR'
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elif isinstance(address, basestring):
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rtype = 'A'
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answers = dns.resolver.query(address, rtype)
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if answers:
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return str(answers[0])
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return None
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def get_host_ip(hostname):
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"""
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Resolves the IP for a given hostname, or returns
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the input if it is already an IP.
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"""
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if is_ip(hostname):
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return hostname
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return ns_query(hostname)
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def get_hostname(address):
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"""
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Resolves hostname for given IP, or returns the input
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if it is already a hostname.
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"""
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if not is_ip(address):
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return address
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try:
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import dns.reversename
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except ImportError:
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apt_install('python-dnspython')
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import dns.reversename
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rev = dns.reversename.from_address(address)
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result = ns_query(rev)
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if not result:
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return None
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# strip trailing .
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if result.endswith('.'):
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return result[:-1]
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return result
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