Merge James' lib/ refactoring.

This commit is contained in:
Adam Gandelman 2013-03-18 10:06:50 -07:00
commit e46b7adb79
17 changed files with 503 additions and 503 deletions

17
.project Normal file
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@ -0,0 +1,17 @@
<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>rabbitmq-server</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.python.pydev.PyDevBuilder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.python.pydev.pythonNature</nature>
</natures>
</projectDescription>

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.pydevproject Normal file
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<?eclipse-pydev version="1.0"?><pydev_project>
<pydev_property name="org.python.pydev.PYTHON_PROJECT_VERSION">python 2.7</pydev_property>
<pydev_property name="org.python.pydev.PYTHON_PROJECT_INTERPRETER">Default</pydev_property>
<pydev_pathproperty name="org.python.pydev.PROJECT_SOURCE_PATH">
<path>/rabbitmq-server/hooks</path>
</pydev_pathproperty>
</pydev_project>

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rabbitmq-server-relations.py
rabbitmq_server_relations.py

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rabbitmq-server-relations.py
rabbitmq_server_relations.py

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rabbitmq-server-relations.py
rabbitmq_server_relations.py

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rabbitmq-server-relations.py
rabbitmq_server_relations.py

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rabbitmq-server-relations.py
rabbitmq_server_relations.py

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rabbitmq-server-relations.py
rabbitmq_server_relations.py

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@ -1 +1 @@
rabbitmq-server-relations.py
rabbitmq_server_relations.py

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rabbitmq-server-relations.py
rabbitmq_server_relations.py

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@ -1,10 +1,18 @@
import utils
#
# Copyright 2012 Canonical Ltd.
#
# This file is sourced from lp:openstack-charm-helpers
#
# Authors:
# James Page <james.page@ubuntu.com>
# Adam Gandelman <adamg@ubuntu.com>
#
import commands
import re
import subprocess
import sys
import os
import shutil
import lib.utils as utils
KEYRING = '/etc/ceph/ceph.client.%s.keyring'
KEYFILE = '/etc/ceph/ceph.client.%s.key'
@ -15,6 +23,7 @@ CEPH_CONF = """[global]
mon host = %(mon_hosts)s
"""
def execute(cmd):
subprocess.check_call(cmd)
@ -55,6 +64,7 @@ def pool_exists(service, name):
(rc, out) = commands.getstatusoutput("rados --id %s lspools" % service)
return name in out
def create_pool(service, name):
cmd = [
'rados',
@ -69,9 +79,11 @@ def create_pool(service, name):
def keyfile_path(service):
return KEYFILE % service
def keyring_path(service):
return KEYRING % service
def create_keyring(service, key):
keyring = keyring_path(service)
if os.path.exists(keyring):
@ -91,11 +103,11 @@ def create_key_file(service, key):
# create a file containing the key
keyfile = keyfile_path(service)
if os.path.exists(keyfile):
utils.juju_log('INFO', 'ceph: Keyfile exists at %s.' % keyfile)
utils.juju_log('INFO', 'ceph: Keyfile exists at %s.' % keyfile)
fd = open(keyfile, 'w')
fd.write(key)
fd.close()
utils.juju_log('INFO', 'ceph: Created new keyfile at %s.' % keyfile)
utils.juju_log('INFO', 'ceph: Created new keyfile at %s.' % keyfile)
def get_ceph_nodes():
@ -122,6 +134,7 @@ def image_mapped(image_name):
(rc, out) = commands.getstatusoutput('rbd showmapped')
return image_name in out
def map_block_storage(service, pool, image):
cmd = [
'rbd',
@ -138,6 +151,7 @@ def map_block_storage(service, pool, image):
def filesystem_mounted(fs):
return subprocess.call(['grep', '-wqs', fs, '/proc/mounts']) == 0
def make_filesystem(blk_device, fstype='ext4'):
utils.juju_log('INFO',
'ceph: Formatting block device %s as filesystem %s.' %\
@ -173,9 +187,10 @@ def place_data_on_ceph(service, blk_device, data_src_dst, fstype='ext4'):
cmd = ['chown', '-R', '%s:%s' % (uid, gid), data_src_dst]
execute(cmd)
# TODO: re-use
def modprobe_kernel_module(module):
utils.juju_log('INFO','Loading kernel module')
utils.juju_log('INFO', 'Loading kernel module')
cmd = ['modprobe', module]
execute(cmd)
cmd = 'echo %s >> /etc/modules' % module
@ -191,6 +206,7 @@ def copy_files(src, dst, symlinks=False, ignore=None):
else:
shutil.copy2(s, d)
def ensure_ceph_storage(service, pool, rbd_img, sizemb, mount_point,
blk_device, fstype, system_services=[]):
"""

130
hooks/lib/cluster_utils.py Normal file
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@ -0,0 +1,130 @@
#
# Copyright 2012 Canonical Ltd.
#
# This file is sourced from lp:openstack-charm-helpers
#
# Authors:
# James Page <james.page@ubuntu.com>
# Adam Gandelman <adamg@ubuntu.com>
#
from lib.utils import (
juju_log,
relation_ids,
relation_list,
relation_get,
get_unit_hostname,
config_get
)
import subprocess
import os
def is_clustered():
for r_id in (relation_ids('ha') or []):
for unit in (relation_list(r_id) or []):
clustered = relation_get('clustered',
rid=r_id,
unit=unit)
if clustered:
return True
return False
def is_leader(resource):
cmd = [
"crm", "resource",
"show", resource
]
try:
status = subprocess.check_output(cmd)
except subprocess.CalledProcessError:
return False
else:
if get_unit_hostname() in status:
return True
else:
return False
def peer_units():
peers = []
for r_id in (relation_ids('cluster') or []):
for unit in (relation_list(r_id) or []):
peers.append(unit)
return peers
def oldest_peer(peers):
local_unit_no = os.getenv('JUJU_UNIT_NAME').split('/')[1]
for peer in peers:
remote_unit_no = peer.split('/')[1]
if remote_unit_no < local_unit_no:
return False
return True
def eligible_leader(resource):
if is_clustered():
if not is_leader(resource):
juju_log('INFO', 'Deferring action to CRM leader.')
return False
else:
peers = peer_units()
if peers and not oldest_peer(peers):
juju_log('INFO', 'Deferring action to oldest service unit.')
return False
return True
def https():
'''
Determines whether enough data has been provided in configuration
or relation data to configure HTTPS
.
returns: boolean
'''
if config_get('use-https') == "yes":
return True
if config_get('ssl_cert') and config_get('ssl_key'):
return True
for r_id in relation_ids('identity-service'):
for unit in relation_list(r_id):
if (relation_get('https_keystone', rid=r_id, unit=unit) and
relation_get('ssl_cert', rid=r_id, unit=unit) and
relation_get('ssl_key', rid=r_id, unit=unit) and
relation_get('ca_cert', rid=r_id, unit=unit)):
return True
return False
def determine_api_port(public_port):
'''
Determine correct API server listening port based on
existence of HTTPS reverse proxy and/or haproxy.
public_port: int: standard public port for given service
returns: int: the correct listening port for the API service
'''
i = 0
if len(peer_units()) > 0 or is_clustered():
i += 1
if https():
i += 1
return public_port - (i * 10)
def determine_haproxy_port(public_port):
'''
Description: Determine correct proxy listening port based on public IP +
existence of HTTPS reverse proxy.
public_port: int: standard public port for given service
returns: int: the correct listening port for the HAProxy service
'''
i = 0
if https():
i += 1
return public_port - (i * 10)

283
hooks/lib/utils.py Normal file
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@ -0,0 +1,283 @@
#
# Copyright 2012 Canonical Ltd.
#
# This file is sourced from lp:openstack-charm-helpers
#
# Authors:
# James Page <james.page@ubuntu.com>
# Paul Collins <paul.collins@canonical.com>
# Adam Gandelman <adamg@ubuntu.com>
#
import json
import os
import subprocess
import socket
import sys
def do_hooks(hooks):
hook = os.path.basename(sys.argv[0])
try:
hook_func = hooks[hook]
except KeyError:
juju_log('INFO',
"This charm doesn't know how to handle '{}'.".format(hook))
else:
hook_func()
def install(*pkgs):
cmd = [
'apt-get',
'-y',
'install'
]
for pkg in pkgs:
cmd.append(pkg)
subprocess.check_call(cmd)
TEMPLATES_DIR = 'templates'
try:
import jinja2
except ImportError:
install('python-jinja2')
import jinja2
try:
import dns.resolver
except ImportError:
install('python-dnspython')
import dns.resolver
def render_template(template_name, context, template_dir=TEMPLATES_DIR):
templates = jinja2.Environment(
loader=jinja2.FileSystemLoader(template_dir)
)
template = templates.get_template(template_name)
return template.render(context)
CLOUD_ARCHIVE = \
""" # Ubuntu Cloud Archive
deb http://ubuntu-cloud.archive.canonical.com/ubuntu {} main
"""
CLOUD_ARCHIVE_POCKETS = {
'folsom': 'precise-updates/folsom',
'folsom/updates': 'precise-updates/folsom',
'folsom/proposed': 'precise-proposed/folsom',
'grizzly': 'precise-updates/grizzly',
'grizzly/updates': 'precise-updates/grizzly',
'grizzly/proposed': 'precise-proposed/grizzly'
}
def configure_source():
source = str(config_get('openstack-origin'))
if not source:
return
if source.startswith('ppa:'):
cmd = [
'add-apt-repository',
source
]
subprocess.check_call(cmd)
if source.startswith('cloud:'):
install('ubuntu-cloud-keyring')
pocket = source.split(':')[1]
with open('/etc/apt/sources.list.d/cloud-archive.list', 'w') as apt:
apt.write(CLOUD_ARCHIVE.format(CLOUD_ARCHIVE_POCKETS[pocket]))
if source.startswith('deb'):
l = len(source.split('|'))
if l == 2:
(apt_line, key) = source.split('|')
cmd = [
'apt-key',
'adv', '--keyserver keyserver.ubuntu.com',
'--recv-keys', key
]
subprocess.check_call(cmd)
elif l == 1:
apt_line = source
with open('/etc/apt/sources.list.d/quantum.list', 'w') as apt:
apt.write(apt_line + "\n")
cmd = [
'apt-get',
'update'
]
subprocess.check_call(cmd)
# Protocols
TCP = 'TCP'
UDP = 'UDP'
def expose(port, protocol='TCP'):
cmd = [
'open-port',
'{}/{}'.format(port, protocol)
]
subprocess.check_call(cmd)
def juju_log(severity, message):
cmd = [
'juju-log',
'--log-level', severity,
message
]
subprocess.check_call(cmd)
def relation_ids(relation):
cmd = [
'relation-ids',
relation
]
result = str(subprocess.check_output(cmd)).split()
if result == "":
return None
else:
return result
def relation_list(rid):
cmd = [
'relation-list',
'-r', rid,
]
result = str(subprocess.check_output(cmd)).split()
if result == "":
return None
else:
return result
def relation_get(attribute, unit=None, rid=None):
cmd = [
'relation-get',
]
if rid:
cmd.append('-r')
cmd.append(rid)
cmd.append(attribute)
if unit:
cmd.append(unit)
value = subprocess.check_output(cmd).strip() # IGNORE:E1103
if value == "":
return None
else:
return value
def relation_set(**kwargs):
cmd = [
'relation-set'
]
args = []
for k, v in kwargs.items():
if k == 'rid':
if v:
cmd.append('-r')
cmd.append(v)
else:
args.append('{}={}'.format(k, v))
cmd += args
subprocess.check_call(cmd)
def unit_get(attribute):
cmd = [
'unit-get',
attribute
]
value = subprocess.check_output(cmd).strip() # IGNORE:E1103
if value == "":
return None
else:
return value
def config_get(attribute):
cmd = [
'config-get',
'--format',
'json',
]
out = subprocess.check_output(cmd).strip() # IGNORE:E1103
cfg = json.loads(out)
try:
return cfg[attribute]
except KeyError:
return None
def get_unit_hostname():
return socket.gethostname()
def get_host_ip(hostname=unit_get('private-address')):
try:
# Test to see if already an IPv4 address
socket.inet_aton(hostname)
return hostname
except socket.error:
answers = dns.resolver.query(hostname, 'A')
if answers:
return answers[0].address
return None
def _svc_control(service, action):
subprocess.check_call(['service', service, action])
def restart(*services):
for service in services:
_svc_control(service, 'restart')
def stop(*services):
for service in services:
_svc_control(service, 'stop')
def start(*services):
for service in services:
_svc_control(service, 'start')
def reload(*services):
for service in services:
try:
_svc_control(service, 'reload')
except subprocess.CalledProcessError:
# Reload failed - either service does not support reload
# or it was not running - restart will fixup most things
_svc_control(service, 'restart')
def running(service):
try:
output = subprocess.check_output(['service', service, 'status'])
except subprocess.CalledProcessError:
return False
else:
if ("start/running" in output or
"is running" in output):
return True
else:
return False
def is_relation_made(relation, key='private-address'):
for r_id in (relation_ids(relation) or []):
for unit in (relation_list(r_id) or []):
if relation_get(key, rid=r_id, unit=unit):
return True
return False

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@ -1,7 +1,7 @@
import os
import re
import subprocess
import utils
import lib.utils as utils
import apt_pkg as apt
PACKAGES = ['pwgen', 'rabbitmq-server']
@ -9,6 +9,7 @@ PACKAGES = ['pwgen', 'rabbitmq-server']
RABBITMQ_CTL = '/usr/sbin/rabbitmqctl'
COOKIE_PATH = '/var/lib/rabbitmq/.erlang.cookie'
def vhost_exists(vhost):
cmd = [RABBITMQ_CTL, 'list_vhosts']
out = subprocess.check_output(cmd)

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@ -7,19 +7,22 @@ import subprocess
import rabbit_utils as rabbit
import utils
import lib.ceph as ceph
import lib.utils as utils
import lib.cluster_utils as cluster
import lib.ceph_utils as ceph
SERVICE_NAME = os.getenv('JUJU_UNIT_NAME').split('/')[0]
POOL_NAME = SERVICE_NAME
RABBIT_DIR='/var/lib/rabbitmq'
RABBIT_DIR = '/var/lib/rabbitmq'
def install():
utils.install(*rabbit.PACKAGES)
utils.expose(5672)
def amqp_changed(relation_id=None, remote_unit=None):
if not utils.eligible_leader('res_rabbitmq_vip'):
if not cluster.eligible_leader('res_rabbitmq_vip'):
msg = 'amqp_changed(): Deferring amqp_changed to eligible_leader.'
utils.juju_log('INFO', msg)
return
@ -47,7 +50,7 @@ def amqp_changed(relation_id=None, remote_unit=None):
relation_settings = {
'password': password
}
if utils.is_clustered():
if cluster.is_clustered():
relation_settings['clustered'] = 'true'
relation_settings['vip'] = utils.config_get('vip')
if relation_id:
@ -107,7 +110,6 @@ def cluster_changed():
def ha_joined():
config = {}
corosync_bindiface = utils.config_get('ha-bindiface')
corosync_mcastport = utils.config_get('ha-mcastport')
vip = utils.config_get('vip')
@ -121,14 +123,13 @@ def ha_joined():
'configure hacluster.')
sys.exit(1)
if not utils.is_relation_made('ceph'):
if not utils.is_relation_made('ceph', 'auth'):
utils.juju_log('INFO',
'ha_joined: No ceph relation yet, deferring.')
return
# rabbit node-name need to match on all nodes.
utils.juju_log('INFO','Stopping rabbitmq-server.')
utils.juju_log('INFO', 'Stopping rabbitmq-server.')
utils.stop('rabbitmq-server')
rabbit.set_node_name('%s@localhost' % SERVICE_NAME)
@ -138,26 +139,28 @@ def ha_joined():
relation_settings['corosync_mcastport'] = corosync_mcastport
relation_settings['resources'] = {
'res_rabbitmq_rbd':'ocf:ceph:rbd',
'res_rabbitmq_fs':'ocf:heartbeat:Filesystem',
'res_rabbitmq_vip':'ocf:heartbeat:IPaddr2',
'res_rabbitmq-server':'lsb:rabbitmq-server',
'res_rabbitmq_rbd': 'ocf:ceph:rbd',
'res_rabbitmq_fs': 'ocf:heartbeat:Filesystem',
'res_rabbitmq_vip': 'ocf:heartbeat:IPaddr2',
'res_rabbitmq-server': 'lsb:rabbitmq-server',
}
relation_settings['resource_params'] = {
'res_rabbitmq_rbd': 'params name="%s" pool="%s" user="%s" secret="%s"' %\
(rbd_name, POOL_NAME, SERVICE_NAME, ceph.keyfile_path(SERVICE_NAME)),
'res_rabbitmq_rbd': 'params name="%s" pool="%s" user="%s" '
'secret="%s"' % \
(rbd_name, POOL_NAME,
SERVICE_NAME, ceph.keyfile_path(SERVICE_NAME)),
'res_rabbitmq_fs': 'params device="/dev/rbd/%s/%s" directory="%s" '\
'fstype="ext4" op start start-delay="10s"' %\
(POOL_NAME, rbd_name, RABBIT_DIR),
'res_rabbitmq_vip':'params ip="%s" cidr_netmask="%s" nic="%s"' %\
(vip, vip_cidr, vip_iface),
'res_rabbitmqd':'op start start-delay="5s" op monitor interval="5s"',
'fstype="ext4" op start start-delay="10s"' %\
(POOL_NAME, rbd_name, RABBIT_DIR),
'res_rabbitmq_vip': 'params ip="%s" cidr_netmask="%s" nic="%s"' %\
(vip, vip_cidr, vip_iface),
'res_rabbitmqd': 'op start start-delay="5s" op monitor interval="5s"',
}
relation_settings['groups'] = {
'grp_rabbitmq':'res_rabbitmq_rbd res_rabbitmq_fs res_rabbitmq_vip '\
'res_rabbitmq-server',
'grp_rabbitmq': 'res_rabbitmq_rbd res_rabbitmq_fs res_rabbitmq_vip '\
'res_rabbitmq-server',
}
for rel_id in utils.relation_ids('ha'):
@ -165,14 +168,12 @@ def ha_joined():
def ha_changed():
if not utils.is_clustered():
if not cluster.is_clustered():
return
vip = utils.config_get('vip')
utils.juju_log('INFO', 'ha_changed(): We are now HA clustered. '\
utils.juju_log('INFO', 'ha_changed(): We are now HA clustered. '
'Advertising our VIP (%s) to all AMQP clients.' %\
vip)
relation_settings = {'vip': vip, 'clustered': 'true'}
# need to re-authenticate all clients since node-name changed.
for rid in utils.relation_ids('amqp'):
for unit in utils.relation_list(rid):
@ -195,7 +196,7 @@ def ceph_changed():
ceph.configure(service=SERVICE_NAME, key=key, auth=auth)
if utils.eligible_leader('res_rabbitmq_vip'):
if cluster.eligible_leader('res_rabbitmq_vip'):
rbd_img = utils.config_get('rbd-name')
rbd_size = utils.config_get('rbd-size')
sizemb = int(rbd_size.split('G')[0]) * 1024
@ -208,7 +209,7 @@ def ceph_changed():
else:
utils.juju_log('INFO',
'This is not the peer leader. Not configuring RBD.')
utils.juju_log('INFO','Stopping rabbitmq-server.')
utils.juju_log('INFO', 'Stopping rabbitmq-server.')
utils.stop('rabbitmq-server')
# If 'ha' relation has been made before the 'ceph' relation
@ -230,8 +231,9 @@ def upgrade_charm():
if f.endswith('.passwd'):
s = os.path.join('/var/lib/juju', f)
d = os.path.join('/var/lib/rabbitmq', f)
m = 'upgrade_charm: Migrating stored passwd from %s to %s.' % (s, d)
utils.juju_log('INFO', m)
utils.juju_log('INFO',
'upgrade_charm: Migrating stored passwd'
' from %s to %s.' % (s, d))
shutil.move(s, d)
hooks = {

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@ -1 +1 @@
rabbitmq-server-relations.py
rabbitmq_server_relations.py

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@ -1,457 +0,0 @@
#
# Copyright 2012 Canonical Ltd.
#
# Authors:
# James Page <james.page@ubuntu.com>
# Paul Collins <paul.collins@canonical.com>
#
import os
import subprocess
import socket
import sys
import fcntl
import struct
import json
import time
def do_hooks(hooks):
hook = os.path.basename(sys.argv[0])
try:
hook_func = hooks[hook]
except KeyError:
juju_log('INFO',
"This charm doesn't know how to handle '{}'.".format(hook))
else:
hook_func()
def can_install():
try:
fd = os.open("/var/lib/dpkg/lock", os.O_RDWR|os.O_CREAT|os.O_NOFOLLOW, 0640)
fcntl.lockf(fd, fcntl.LOCK_EX | fcntl.LOCK_NB)
except IOError, message:
os.close(fd)
return False
else:
fcntl.lockf(fd, fcntl.LOCK_UN)
os.close(fd)
return True
def install(*pkgs):
cmd = [
'apt-get',
'-y',
'install'
]
for pkg in pkgs:
cmd.append(pkg)
while not can_install():
juju_log('INFO',
"dpkg is busy, can't install %s yet, waiting..." % pkgs)
time.sleep(1)
subprocess.check_call(cmd)
TEMPLATES_DIR = 'templates'
try:
import jinja2
except ImportError:
install('python-jinja2')
import jinja2
try:
from netaddr import IPNetwork
except ImportError:
install('python-netaddr')
from netaddr import IPNetwork
try:
import dns.resolver
except ImportError:
install('python-dnspython')
import dns.resolver
def render_template(template_name, context, template_dir=TEMPLATES_DIR):
templates = jinja2.Environment(
loader=jinja2.FileSystemLoader(template_dir)
)
template = templates.get_template(template_name)
return template.render(context)
CLOUD_ARCHIVE = \
""" # Ubuntu Cloud Archive
deb http://ubuntu-cloud.archive.canonical.com/ubuntu {} main
"""
CLOUD_ARCHIVE_POCKETS = {
'precise-folsom': 'precise-updates/folsom',
'precise-folsom/updates': 'precise-updates/folsom',
'precise-folsom/proposed': 'precise-proposed/folsom',
'precise-grizzly': 'precise-updates/grizzly',
'precise-grizzly/updates': 'precise-updates/grizzly',
'precise-grizzly/proposed': 'precise-proposed/grizzly'
}
def execute(cmd, die=False, echo=False):
""" Executes a command
if die=True, script will exit(1) if command does not return 0
if echo=True, output of command will be printed to stdout
returns a tuple: (stdout, stderr, return code)
"""
p = subprocess.Popen(cmd.split(" "),
stdout=subprocess.PIPE,
stdin=subprocess.PIPE,
stderr=subprocess.PIPE)
stdout=""
stderr=""
def print_line(l):
if echo:
print l.strip('\n')
sys.stdout.flush()
for l in iter(p.stdout.readline, ''):
print_line(l)
stdout += l
for l in iter(p.stderr.readline, ''):
print_line(l)
stderr += l
p.communicate()
rc = p.returncode
if die and rc != 0:
error_out("ERROR: command %s return non-zero.\n" % cmd)
return (stdout, stderr, rc)
def configure_source():
source = str(config_get('openstack-origin'))
if not source:
return
if source.startswith('ppa:'):
cmd = [
'add-apt-repository',
source
]
subprocess.check_call(cmd)
if source.startswith('cloud:'):
install('ubuntu-cloud-keyring')
pocket = source.split(':')[1]
with open('/etc/apt/sources.list.d/cloud-archive.list', 'w') as apt:
apt.write(CLOUD_ARCHIVE.format(CLOUD_ARCHIVE_POCKETS[pocket]))
if source.startswith('deb'):
l = len(source.split('|'))
if l == 2:
(apt_line, key) = source.split('|')
cmd = [
'apt-key',
'adv', '--keyserver keyserver.ubuntu.com',
'--recv-keys', key
]
subprocess.check_call(cmd)
elif l == 1:
apt_line = source
with open('/etc/apt/sources.list.d/quantum.list', 'w') as apt:
apt.write(apt_line + "\n")
cmd = [
'apt-get',
'update'
]
subprocess.check_call(cmd)
# Protocols
TCP = 'TCP'
UDP = 'UDP'
def expose(port, protocol='TCP'):
cmd = [
'open-port',
'{}/{}'.format(port, protocol)
]
subprocess.check_call(cmd)
def juju_log(severity, message):
cmd = [
'juju-log',
'--log-level', severity,
message
]
subprocess.check_call(cmd)
def relation_ids(relation):
cmd = [
'relation-ids',
relation
]
return subprocess.check_output(cmd).split() # IGNORE:E1103
def relation_list(rid):
cmd = [
'relation-list',
'-r', rid,
]
return subprocess.check_output(cmd).split() # IGNORE:E1103
def relation_get(attribute, unit=None, rid=None):
cmd = [
'relation-get',
]
if rid:
cmd.append('-r')
cmd.append(rid)
cmd.append(attribute)
if unit:
cmd.append(unit)
value = subprocess.check_output(cmd).strip() # IGNORE:E1103
if value == "":
return None
else:
return value
def relation_get_dict(relation_id=None, remote_unit=None):
"""Obtain all relation data as dict by way of JSON"""
cmd = 'relation-get --format=json'
if relation_id:
cmd += ' -r %s' % relation_id
if remote_unit:
remote_unit_orig = os.getenv('JUJU_REMOTE_UNIT', None)
os.environ['JUJU_REMOTE_UNIT'] = remote_unit
j = execute(cmd, die=True)[0]
if remote_unit and remote_unit_orig:
os.environ['JUJU_REMOTE_UNIT'] = remote_unit_orig
d = json.loads(j)
settings = {}
# convert unicode to strings
for k, v in d.iteritems():
settings[str(k)] = str(v)
return settings
def relation_set(**kwargs):
cmd = [
'relation-set'
]
args = []
for k, v in kwargs.items():
if k == 'rid':
cmd.append('-r')
cmd.append(v)
else:
args.append('{}={}'.format(k, v))
cmd += args
subprocess.check_call(cmd)
def unit_get(attribute):
cmd = [
'unit-get',
attribute
]
value = subprocess.check_output(cmd).strip() # IGNORE:E1103
if value == "":
return None
else:
return value
def config_get(attribute):
cmd = [
'config-get',
attribute
]
value = subprocess.check_output(cmd).strip() # IGNORE:E1103
if value == "":
return None
else:
return value
def get_unit_hostname():
return socket.gethostname()
def get_unit_name():
return os.environ.get('JUJU_UNIT_NAME').replace('/','-')
def get_host_ip(hostname=unit_get('private-address')):
try:
# Test to see if already an IPv4 address
socket.inet_aton(hostname)
return hostname
except socket.error:
pass
try:
answers = dns.resolver.query(hostname, 'A')
if answers:
return answers[0].address
except dns.resolver.NXDOMAIN:
pass
return None
def restart(*services):
for service in services:
subprocess.check_call(['service', service, 'restart'])
def stop(*services):
for service in services:
subprocess.check_call(['service', service, 'stop'])
def start(*services):
for service in services:
subprocess.check_call(['service', service, 'start'])
def running(service):
# TODO: ensure compat. /w sysv init scripts.
try:
output = subprocess.check_output(['service', service, 'status'])
except subprocess.CalledProcessError:
return False
else:
if ("start/running" in output or
"is running" in output):
return True
else:
return False
def disable_upstart_services(*services):
for service in services:
with open("/etc/init/{}.override".format(service), "w") as override:
override.write("manual")
def enable_upstart_services(*services):
for service in services:
path = '/etc/init/{}.override'.format(service)
if os.path.exists(path):
os.remove(path)
def disable_lsb_services(*services):
for service in services:
subprocess.check_call(['update-rc.d', '-f', service, 'remove'])
def enable_lsb_services(*services):
for service in services:
subprocess.check_call(['update-rc.d', '-f', service, 'defaults'])
def get_iface_ipaddr(iface):
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
return socket.inet_ntoa(fcntl.ioctl(
s.fileno(),
0x8919, # SIOCGIFADDR
struct.pack('256s', iface[:15])
)[20:24])
def get_iface_netmask(iface):
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
return socket.inet_ntoa(fcntl.ioctl(
s.fileno(),
0x891b, # SIOCGIFNETMASK
struct.pack('256s', iface[:15])
)[20:24])
def get_netmask_cidr(netmask):
netmask = netmask.split('.')
binary_str = ''
for octet in netmask:
binary_str += bin(int(octet))[2:].zfill(8)
return str(len(binary_str.rstrip('0')))
def get_network_address(iface):
if iface:
network = "{}/{}".format(get_iface_ipaddr(iface),
get_netmask_cidr(get_iface_netmask(iface)))
ip = IPNetwork(network)
return str(ip.network)
else:
return None
def is_clustered():
for r_id in (relation_ids('ha') or []):
for unit in (relation_list(r_id) or []):
relation_data = \
relation_get_dict(relation_id=r_id,
remote_unit=unit)
if 'clustered' in relation_data:
return True
return False
def is_leader(res):
status = execute('crm resource show %s' % res, echo=True)[0].strip()
hostname = execute('hostname', echo=True)[0].strip()
if hostname in status:
return True
else:
return False
def peer_units():
peers = []
for r_id in (relation_ids('cluster') or []):
for unit in (relation_list(r_id) or []):
peers.append(unit)
return peers
def oldest_peer(peers):
local_unit_no = os.getenv('JUJU_UNIT_NAME').split('/')[1]
for peer in peers:
remote_unit_no = peer.split('/')[1]
if remote_unit_no < local_unit_no:
return False
return True
def eligible_leader(res):
if is_clustered():
if not is_leader(res):
juju_log('INFO', 'Deferring action to CRM leader.')
return False
else:
peers = peer_units()
if peers and not oldest_peer(peers):
juju_log('INFO', 'Deferring action to oldest service unit.')
return False
return True
def is_relation_made(relation=None):
relation_data = []
for r_id in (relation_ids(relation) or []):
for unit in (relation_list(r_id) or []):
relation_data.append(relation_get_dict(relation_id=r_id,
remote_unit=unit))
if not relation_data:
return False
return True