#!/usr/bin/python
import subprocess
import sys
import json
import os
keystone_conf = "/etc/keystone/keystone.conf"
stored_passwd = "/var/lib/keystone/keystone.passwd"
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 juju_log(msg):
execute("juju-log \"%s\"" % msg)
def error_out(msg):
juju_log("FATAL ERROR: %s" % msg)
exit(1)
def setup_ppa(rel):
""" Configure a PPA prior to installing.
Currently, keystone-core only maintains a trunk PPA (unlike other
subprojects that maintain one for milestone + milestone-proposed)
Currently, supported options are 'trunk' or a custom PPA passed to config
as 'ppa:someproject/someppa'
"""
if rel == "trunk":
ppa = "ppa:keystone-core/trunk"
elif rel[:4] == "ppa:":
ppa = rel
elif rel[:3] == "deb":
l = len(rel.split('|'))
if l == 2:
ppa, key = rel.split('|')
juju_log("Importing PPA key from keyserver for %s" % ppa)
cmd = "apt-key adv --keyserver keyserver.ubuntu.com " \
"--recv-keys %s" % key
execute(cmd, echo=True)
elif l == 1:
ppa = rel
else:
error_out("Invalid keystone-release: %s" % rel)
else:
error_out("Invalid keystone-release specified: %s" % rel)
subprocess.call(["add-apt-repository", "-y", ppa])
def config_get():
""" Obtain the units config via 'config-get'
Returns a dict representing current config.
private-address and IP of the unit is also tacked on for
convienence
"""
output = execute("config-get --format json")[0]
config = json.loads(output)
# make sure no config element is blank after config-get
for c in config.keys():
if not config[c]:
error_out("ERROR: Config option has no paramter: %s" % c)
# tack on our private address and ip
hostname = execute("unit-get private-address")[0].strip()
config["hostname"] = execute("unit-get private-address")[0].strip()
return config
def relation_set(relation_data):
""" calls relation-set for all key=values in dict """
for k in relation_data:
execute("relation-set %s=%s" % (k, relation_data[k]), die=True)
def relation_get(relation_data):
""" Obtain all current relation data
relation_data is a list of options to query from the relation
Returns a k,v dict of the results.
Leave empty responses out of the results as they haven't yet been
set on the other end.
Caller can then "len(results.keys()) == len(relation_data)" to find out if
all relation values have been set on the other side
"""
results = {}
for r in relation_data:
result = execute("relation-get %s" % r, die=True)[0].strip('\n')
if result != "":
results[r] = result
return results
def relation_get_dict():
"""Obtain all relation data as dict by way of JSON"""
j = execute('relation-get --format=json', die=True)[0]
d = json.loads(j)
settings = {}
# convert unicode to strings
for k, v in d.iteritems():
settings[str(k)] = str(v)
return settings
def get_admin_token():
"""Temporary utility to grab the admin token as configured in
keystone.conf
"""
f = open(keystone_conf, 'r+')
for l in open(keystone_conf, 'r+').readlines():
if l.split(' ')[0] == 'admin_token':
try:
return l.split('=')[1].strip()
except:
error_out('Could not parse admin_token line from %s' %
keystone_conf)
error_out('Could not find admin_token line in %s' % keystone_conf)
def update_config_block(block, **kwargs):
""" Updates keystone.conf blocks given kwargs.
Can be used to update driver settings for a particular backend,
setting the sql connection, etc.
Parses block heading as '[block]'
If block does not exist, a new block will be created at end of file with
given kwargs
"""
f = open(keystone_conf, "r+")
orig = f.readlines()
new = []
found_block = ""
heading = "[%s]\n" % block
lines = len(orig)
ln = 0
def update_block(block):
for k, v in kwargs.iteritems():
for l in block:
if l.strip().split(" ")[0] == k:
block[block.index(l)] = "%s = %s\n" % (k, v)
return
block.append('%s = %s\n' % (k, v))
block.append('\n')
try:
found = False
while ln < lines:
if orig[ln] != heading:
new.append(orig[ln])
ln += 1
else:
new.append(orig[ln])
ln += 1
block = []
while orig[ln].strip() != '':
block.append(orig[ln])
ln += 1
update_block(block)
new += block
found = True
if not found:
if new[(len(new) - 1)].strip() != '':
new.append('\n')
new.append('%s' % heading)
for k, v in kwargs.iteritems():
new.append('%s = %s\n' % (k, v))
new.append('\n')
except:
error_out('Error while attempting to update config block. '\
'Refusing to overwite existing config.')
return
# backup original config
backup = open(keystone_conf + '.juju-back', 'w+')
for l in orig:
backup.write(l)
backup.close()
# update config
f.seek(0)
f.truncate()
for l in new:
f.write(l)
def keystone_conf_update(opt, val):
""" Updates keystone.conf values
If option exists, it is reset to new value
If it does not, it added to the top of the config file after the [DEFAULT]
heading to keep it out of the paste deploy config
"""
f = open(keystone_conf, "r+")
orig = f.readlines()
new = ""
found = False
for l in orig:
if l.split(' ')[0] == opt:
juju_log("Updating %s, setting %s = %s" % (keystone_conf, opt, val))
new += "%s = %s\n" % (opt, val)
found = True
else:
new += l
new = new.split('\n')
# insert a new value at the top of the file, after the 'DEFAULT' header so
# as not to muck up paste deploy configuration later in the file
if not found:
juju_log("Adding new config option %s = %s" % (opt, val))
header = new.index("[DEFAULT]")
new.insert((header+1), "%s = %s" % (opt, val))
f.seek(0)
f.truncate()
for l in new:
f.write("%s\n" % l)
f.close
def create_service_entry(service_name, service_type, service_desc, owner=None):
""" Add a new service entry to keystone if one does not already exist """
import manager
manager = manager.KeystoneManager(endpoint='http://localhost:35357/v2.0/',
token=get_admin_token())
for service in [s._info for s in manager.api.services.list()]:
if service['name'] == service_name:
juju_log("Service entry for '%s' already exists." % service_name)
return
manager.api.services.create(name=service_name,
service_type=service_type,
description=service_desc)
juju_log("Created new service entry '%s'" % service_name)
def create_endpoint_template(region, service, public_url, admin_url,
internal_url):
""" Create a new endpoint template for service if one does not already
exist matching name *and* region """
import manager
manager = manager.KeystoneManager(endpoint='http://localhost:35357/v2.0/',
token=get_admin_token())
service_id = manager.resolve_service_id(service)
for ep in [e._info for e in manager.api.endpoints.list()]:
if ep['service_id'] == service_id and ep['region'] == region:
juju_log("Endpoint template already exists for '%s' in '%s'"
% (service, region))
return
manager.api.endpoints.create(region=region,
service_id=service_id,
publicurl=public_url,
adminurl=admin_url,
internalurl=internal_url)
juju_log("Created new endpoint template for '%s' in '%s'" %
(region, service))
def create_tenant(name):
""" creates a tenant if it does not already exist """
import manager
manager = manager.KeystoneManager(endpoint='http://localhost:35357/v2.0/',
token=get_admin_token())
tenants = [t._info for t in manager.api.tenants.list()]
if not tenants or name not in [t['name'] for t in tenants]:
manager.api.tenants.create(tenant_name=name,
description='Created by Juju')
juju_log("Created new tenant: %s" % name)
return
juju_log("Tenant '%s' already exists." % name)
def create_user(name, password, tenant):
""" creates a user if it doesn't already exist, as a member of tenant """
import manager
manager = manager.KeystoneManager(endpoint='http://localhost:35357/v2.0/',
token=get_admin_token())
users = [u._info for u in manager.api.users.list()]
if not users or name not in [u['name'] for u in users]:
tenant_id = manager.resolve_tenant_id(tenant)
if not tenant_id:
error_out('Could not resolve tenant_id for tenant %s' % tenant)
manager.api.users.create(name=name,
password=password,
email='juju@localhost',
tenant_id=tenant_id)
juju_log("Created new user '%s' pw: %s tenant: %s" % (name, password, tenant_id))
return
juju_log("A user named '%s' already exists" % name)
def create_role(name, user, tenant):
""" creates a role if it doesn't already exist. grants role to user """
import manager
manager = manager.KeystoneManager(endpoint='http://localhost:35357/v2.0/',
token=get_admin_token())
roles = [r._info for r in manager.api.roles.list()]
if not roles or name not in [r['name'] for r in roles]:
manager.api.roles.create(name=name)
juju_log("Created new role '%s'" % name)
else:
juju_log("A role named '%s' already exists" % name)
# NOTE(adam_g): Keystone client requires id's for add_user_role, not names
user_id = manager.resolve_user_id(user)
role_id = manager.resolve_role_id(name)
tenant_id = manager.resolve_tenant_id(tenant)
if None in [user_id, role_id, tenant_id]:
error_out("Could not resolve [user_id, role_id, tenant_id]" %
[user_id, role_id, tenant_id])
manager.api.roles.add_user_role(user=user_id,
role=role_id,
tenant=tenant_id)
juju_log("Granted role '%s' to '%s'" % (name, user))
def generate_admin_token(config):
""" generate and add an admin token """
import manager
manager = manager.KeystoneManager(endpoint='http://localhost:35357/v2.0/',
token='ADMIN')
if config["admin-token"] == "None":
import random
token = random.randrange(1000000000000, 9999999999999)
else:
return config["admin-token"]
manager.api.add_token(token, config["admin-user"], "admin", config["token-expiry"])
juju_log("Generated and added new random admin token.")
return token
def ensure_initial_admin(config):
""" Ensures the minimum admin stuff exists in whatever database we're using.
This and the helper functions it calls are meant to be idempotent and
run during install as well as during db-changed. This will maintain
the admin tenant, user, role, service entry and endpoint across every
datastore we might use.
TODO: Possibly migrate data from one backend to another after it
changes?
"""
create_tenant("admin")
passwd = ""
if config["admin-password"] != "None":
passwd = config["admin-password"]
elif os.path.isfile(stored_passwd):
juju_log("Loading stored passwd from %s" % stored_passwd)
passwd = open(stored_passwd, 'r').readline().strip('\n')
if passwd == "":
juju_log("Generating new passwd for user: %s" % config["admin-user"])
passwd = execute("pwgen -c 16 1", die=True)[0]
open(stored_passwd, 'w+').writelines("%s\n" % passwd)
create_user(config["admin-user"], passwd, tenant="admin")
create_role("Admin", config["admin-user"], 'admin')
# TODO(adam_g): The following roles are likely not needed since redux merge
create_role("KeystoneAdmin", config["admin-user"], 'admin')
create_role("KeystoneServiceAdmin", config["admin-user"], 'admin')
create_service_entry("keystone", "identity", "Keystone Identity Service")
# following documentation here, perhaps we should be using juju
# public/private addresses for public/internal urls.
public_url = "http://%s:%s/v2.0" % (config["hostname"], config["service-port"])
admin_url = "http://%s:%s/v2.0" % (config["hostname"], config["admin-port"])
internal_url = "http://%s:%s/v2.0" % (config["hostname"], config["service-port"])
create_endpoint_template("RegionOne", "keystone", public_url,
admin_url, internal_url)