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#!/usr/bin/python
import sys
import socket
import os
import base64
from charmhelpers.core.hookenv import (
Hooks, UnregisteredHookError, log)
from shutil import rmtree
from subprocess import CalledProcessError
from common import (
write_json_file, JujuBroker, LandscapeBroker, chown,
get_juju_info_filenames)
from ceph import (
get_ceph_client_path, write_ceph_client_keyring, write_ceph_client_config)
CERT_FILE = "/etc/ssl/certs/landscape_server_ca.crt"
JUJU_BROKER = JujuBroker()
hooks = Hooks()
def get_landscape_broker():
return LandscapeBroker()
@hooks.hook("registration-relation-joined", "registration-relation-changed")
def registration_relation(juju_broker=JUJU_BROKER, landscape_broker=None):
if landscape_broker is None:
landscape_broker = get_landscape_broker()
data = juju_broker.get_relation_config()
if "ping-url" in data:
config_changed(relation_data=data, juju_broker=juju_broker,
landscape_broker=landscape_broker)
@hooks.hook("config-changed")
def config_changed(relation_data=None, juju_broker=JUJU_BROKER,
landscape_broker=None):
"""
@param relation_data: data from the context of a relation, it should
match the data in the config
"""
if landscape_broker is None:
landscape_broker = get_landscape_broker()
juju_broker.log("In config-changed for %s" % landscape_broker.local_unit)
if relation_data is None:
relation_data = {}
service_config = juju_broker.get_service_config()
# Only update client config with service configs that have been set
service_config = dict(
(key, value) for key, value in service_config.iteritems()
if value is not None)
relation_data.update(service_config)
if relation_data.get("ssl-public-key", "").startswith("base64:"):
_write_certificate(relation_data["ssl-public-key"][7:], CERT_FILE)
relation_data["ssl-public-key"] = CERT_FILE
if "account-name" in relation_data:
return landscape_broker.update_client_config(relation_data)
@hooks.hook("upgrade-charm")
def upgrade_charm(landscape_broker=None):
"""Idempotently upgrades state from older charms."""
if landscape_broker is None:
landscape_broker = get_landscape_broker()
landscape_broker.config.reload()
return migrate_old_juju_info(landscape_broker.config)
@hooks.hook("container-relation-joined", "ceph-client-relation-joined")
def container_relation_joined(juju_broker=JUJU_BROKER, landscape_broker=None):
if landscape_broker is None:
landscape_broker = get_landscape_broker()
juju_broker.log("In container-relation-joined for %s"
"" % landscape_broker.local_unit)
landscape_broker.config.reload()
relation_conf = juju_broker.get_relation_config()
remote_unit_name = juju_broker.environment.get("JUJU_REMOTE_UNIT")
# We use the remote unit for the unit name, since we want to associate this
# client with the unit it's managing, not its own unit.
juju_info = {
"environment-uuid": juju_broker.environment.get("JUJU_ENV_UUID"),
"unit-name": remote_unit_name,
"api-addresses": juju_broker.environment.get("JUJU_API_ADDRESSES"),
"private-address": relation_conf.get("private-address")}
# Let's not use any "/" in a filename.
unit_name = remote_unit_name.replace("/", "-")
juju_file = "%s.json" % unit_name
juju_info_dir = landscape_broker.juju_directory
try:
os.mkdir(juju_info_dir)
except OSError:
pass # The file already exists.
juju_info_file = os.path.join(juju_info_dir, juju_file)
write_json_file(juju_info_file, juju_info)
exit_code = landscape_broker.update_client_config(
{"computer-title": socket.gethostname()})
return exit_code
@hooks.hook("container-relation-departed")
def container_relation_departed(landscape_broker=None):
"""Stop managing the removed unit with Landscape.
If the relation is removed, the registration will be cleared, the
computer title unset and the juju info file removed, so that we
won't try to register again when the config-changed hook is fired.
"""
if landscape_broker is None:
landscape_broker = get_landscape_broker()
landscape_broker.clear_registration()
# Delete all of the juju-info files.
files_to_delete = get_juju_info_filenames(landscape_broker.juju_directory)
for to_delete in files_to_delete:
os.remove(to_delete)
landscape_broker.update_client_config(
{"computer-title": ""}, try_to_register=False)
@hooks.hook("ceph-client-relation-changed")
def ceph_relation_changed(juju_broker=JUJU_BROKER, landscape_broker=None):
if landscape_broker is None:
landscape_broker = get_landscape_broker()
relation_config = juju_broker.get_relation_config()
# The key is only reported once the ceph ring has quorum (there are enough
# nodes in the service). There's nothing to do until the key is provided.
if "key" not in relation_config:
juju_broker.log(
"Ceph key not reported in relation config, nothing to do.")
return 0
ceph_client_dir = get_ceph_client_path(landscape_broker)
if not os.path.exists(ceph_client_dir):
os.mkdir(ceph_client_dir)
chown(ceph_client_dir)
# Create ceph client keyring and config for landscape-client use.
try:
keyring_file = write_ceph_client_keyring(
landscape_broker, "landscape-client", relation_config["key"])
except CalledProcessError as err:
juju_broker.log(
"Writing ceph keyring file failed with code %d" % err.returncode)
return 1
try:
write_ceph_client_config(
landscape_broker, relation_config["auth"], keyring_file,
relation_config["private-address"])
except IOError as err:
juju_broker.log("Writing ceph configuration file failed: %s" % err)
return 1
else:
juju_broker.log("Ceph configuration written to file.")
return 0
@hooks.hook("ceph-client-relation-broken")
def ceph_relation_broken(landscape_broker=None):
if landscape_broker is None:
landscape_broker = get_landscape_broker()
rmtree(get_ceph_client_path(landscape_broker), ignore_errors=True)
@hooks.hook("ceph-client-relation-departed")
def ceph_relation_departed(landscape_broker=None):
if landscape_broker is None:
landscape_broker = get_landscape_broker()
landscape_broker.clear_registration()
def migrate_old_juju_info(client_config):
"""
Migrates data from the old meta-data.d directory into the new
juju-info.json file.
"""
fallback_meta_data_dir = os.path.join(
client_config.data_path, "meta-data.d")
meta_data_dir = client_config.get("meta_data_path", fallback_meta_data_dir)
if not os.path.exists(meta_data_dir):
return 0
juju_info_file = os.path.join(client_config.data_path, "juju-info.json")
juju_key_map = {"juju-env-uuid": "environment-uuid",
"juju-unit-name": "unit-name",
"juju-api-addresses": "api-addresses",
"juju-private-address": "private-address"}
juju_info = dict.fromkeys(juju_key_map.values())
files_to_delete = []
for filename, info_key in juju_key_map.iteritems():
file_path = os.path.join(meta_data_dir, filename)
if not os.path.exists(file_path):
continue
with open(file_path, "r") as juju_info_part_file:
juju_info[info_key] = juju_info_part_file.read().strip()
files_to_delete.append(file_path)
missing_values = [value is None for value in juju_info.itervalues()]
# If they're all missing it probably means we've already converted.
if all(missing_values):
return 0
# ... otherwise there's something unexpected going on.
if any(missing_values):
return "Incomplete Juju information found in %s" % meta_data_dir
write_json_file(juju_info_file, juju_info)
for file_to_delete in files_to_delete:
os.remove(file_to_delete)
return 0
def _write_certificate(certificate, filename):
"""
@param certificate Text of the certificate, base64 encoded.
@param filename Full path to file to write
"""
with open(filename, "w") as file:
file.write(base64.b64decode(certificate))
if __name__ == '__main__':
try:
sys.exit(hooks.execute(sys.argv))
except UnregisteredHookError as e:
log('Unknown hook {} - skipping.'.format(e))
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