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#
# Copyright 2012 Canonical Ltd.
#
# Authors:
# James Page <james.page@ubuntu.com>
#
from lib.utils import (
relation_ids,
relation_list,
relation_get,
render_template,
juju_log,
config_get,
install,
get_host_ip,
restart
)
from lib.cluster_utils import https
import os
import subprocess
from base64 import b64decode
APACHE_SITE_DIR = "/etc/apache2/sites-available"
SITE_TEMPLATE = "apache2_site.tmpl"
RELOAD_CHECK = "To activate the new configuration"
def get_cert():
cert = config_get('ssl_cert')
key = config_get('ssl_key')
if not (cert and key):
juju_log('INFO',
"Inspecting identity-service relations for SSL certificate.")
cert = key = None
for r_id in relation_ids('identity-service'):
for unit in relation_list(r_id):
if not cert:
cert = relation_get('ssl_cert',
rid=r_id, unit=unit)
if not key:
key = relation_get('ssl_key',
rid=r_id, unit=unit)
return (cert, key)
def get_ca_cert():
ca_cert = None
juju_log('INFO',
"Inspecting identity-service relations for CA SSL certificate.")
for r_id in relation_ids('identity-service'):
for unit in relation_list(r_id):
if not ca_cert:
ca_cert = relation_get('ca_cert',
rid=r_id, unit=unit)
return ca_cert
def install_ca_cert(ca_cert):
if ca_cert:
with open('/usr/local/share/ca-certificates/keystone_juju_ca_cert.crt',
'w') as crt:
crt.write(ca_cert)
subprocess.check_call(['update-ca-certificates', '--fresh'])
def enable_https(port_maps, namespace, cert, key, ca_cert=None):
'''
For a given number of port mappings, configures apache2
HTTPs local reverse proxying using certficates and keys provided in
either configuration data (preferred) or relation data. Assumes ports
are not in use (calling charm should ensure that).
port_maps: dict: external to internal port mappings
namespace: str: name of charm
'''
def _write_if_changed(path, new_content):
content = None
if os.path.exists(path):
with open(path, 'r') as f:
content = f.read().strip()
if content != new_content:
with open(path, 'w') as f:
f.write(new_content)
return True
else:
return False
juju_log('INFO', "Enabling HTTPS for port mappings: {}".format(port_maps))
http_restart = False
if cert:
cert = b64decode(cert)
if key:
key = b64decode(key)
if ca_cert:
ca_cert = b64decode(ca_cert)
if not cert and not key:
juju_log('ERROR',
"Expected but could not find SSL certificate data, not "
"configuring HTTPS!")
return False
install('apache2')
if RELOAD_CHECK in subprocess.check_output(['a2enmod', 'ssl',
'proxy', 'proxy_http']):
http_restart = True
ssl_dir = os.path.join('/etc/apache2/ssl', namespace)
if not os.path.exists(ssl_dir):
os.makedirs(ssl_dir)
if (_write_if_changed(os.path.join(ssl_dir, 'cert'), cert)):
http_restart = True
if (_write_if_changed(os.path.join(ssl_dir, 'key'), key)):
http_restart = True
os.chmod(os.path.join(ssl_dir, 'key'), 0600)
install_ca_cert(ca_cert)
sites_dir = '/etc/apache2/sites-available'
for ext_port, int_port in port_maps.items():
juju_log('INFO',
'Creating apache2 reverse proxy vhost'
' for {}:{}'.format(ext_port,
int_port))
site = "{}_{}".format(namespace, ext_port)
site_path = os.path.join(sites_dir, site)
with open(site_path, 'w') as fsite:
context = {
"ext": ext_port,
"int": int_port,
"namespace": namespace,
"private_address": get_host_ip()
}
fsite.write(render_template(SITE_TEMPLATE,
context))
if RELOAD_CHECK in subprocess.check_output(['a2ensite', site]):
http_restart = True
if http_restart:
restart('apache2')
return True
def disable_https(port_maps, namespace):
'''
Ensure HTTPS reverse proxying is disables for given port mappings
port_maps: dict: of ext -> int port mappings
namespace: str: name of chamr
'''
juju_log('INFO', 'Ensuring HTTPS disabled for {}'.format(port_maps))
if (not os.path.exists('/etc/apache2') or
not os.path.exists(os.path.join('/etc/apache2/ssl', namespace))):
return
http_restart = False
for ext_port in port_maps.keys():
if os.path.exists(os.path.join(APACHE_SITE_DIR,
"{}_{}".format(namespace,
ext_port))):
juju_log('INFO',
"Disabling HTTPS reverse proxy"
" for {} {}.".format(namespace,
ext_port))
if (RELOAD_CHECK in
subprocess.check_output(['a2dissite',
'{}_{}'.format(namespace,
ext_port)])):
http_restart = True
if http_restart:
restart(['apache2'])
def setup_https(port_maps, namespace, cert, key, ca_cert=None):
'''
Ensures HTTPS is either enabled or disabled for given port
mapping.
port_maps: dict: of ext -> int port mappings
namespace: str: name of charm
'''
if not https:
disable_https(port_maps, namespace)
else:
enable_https(port_maps, namespace, cert, key, ca_cert)
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