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#
# 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 re
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
"""
def configure_source():
source = str(config_get('source'))
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(pocket))
if source.startswith('http:') and not source.startswith('http://ceph.com'):
with open('/etc/apt/sources.list.d/ceph.list', 'w') as apt:
apt.write("deb " + source + "\n")
key = config_get('key')
if key:
cmd = [
'apt-key',
'adv', '--keyserver keyserver.ubuntu.com',
'--recv-keys', key
]
subprocess.check_call(cmd)
if source.startswith('http://ceph.com'):
with open('/etc/apt/sources.list.d/ceph.list', 'w') as apt:
apt.write("deb " + source + "\n")
subprocess.check_call(["wget -q -O- 'https://ceph.com/git/?p=ceph.git;a=blob_plain;f=keys/release.asc' | sudo apt-key add -"], shell=True)
cmd = [
'apt-get',
'update'
]
subprocess.check_call(cmd)
def enable_pocket(pocket):
apt_sources = "/etc/apt/sources.list"
with open(apt_sources, "r") as sources:
lines = sources.readlines()
with open(apt_sources, "w") as sources:
for line in lines:
if pocket in line:
sources.write(re.sub('^# deb', 'deb', line))
else:
sources.write(line)
# 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 = str(subprocess.check_output(cmd)).strip()
if value == "":
return None
else:
return value
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 = str(subprocess.check_output(cmd)).strip()
if value == "":
return None
else:
return value
def config_get(attribute):
cmd = [
'config-get',
attribute
]
value = str(subprocess.check_output(cmd)).strip()
if value == "":
return None
else:
return value
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:
# This may throw an NXDOMAIN exception; in which case
# things are badly broken so just let it kill the hook
answers = dns.resolver.query(hostname, 'A')
if answers:
return answers[0].address
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