#!/usr/bin/python
from pdb import *
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
else:
error_out("Invalid keystone-release specified: %s" % rel)
execute(("add-apt-repository -y %s" % ppa), die=True, echo=True)
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()
ip = execute("dig +short %s" % hostname, die=True)[0].strip()
config["hostname"] = hostname
config["ip"] = ip
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 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(manager, service_name, service_type,
service_desc, owner=None):
""" Add a new service entry to keystone if one does not already exist """
for service in manager.api.list_services():
if service[1] == service_name:
juju_log("Service entry for '%s' already exists." % service_name)
return
manager.api.add_service(name=service_name,
type=service_type,
desc=service_desc, owner_id=owner)
juju_log("Created new service entry '%s'" % service_name)
def create_endpoint_template(manager, 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 """
for endpoint in manager.api.list_endpoint_templates():
if endpoint[1] == service and endpoint[3] == region:
juju_log("Endpoint template already exists for '%s' in '%s'"
% (service, region))
return
manager.api.add_endpoint_template(region=region, service=service,
public_url=public_url, admin_url=admin_url,
internal_url=internal_url, enabled=1, is_global=1,
version_id=None, version_list=None,
version_info=None)
juju_log("Created new endpoint template for '%s' in '%s'"
% (region, service))
def create_tenant(manager, name):
""" creates a tenant if it does not already exist """
tenants = manager.api.list_tenants()
if not tenants or name not in map(lambda t: t[1], tenants):
manager.api.add_tenant(name=name)
juju_log("Created new tenant: %s" % name)
return
juju_log("Tenant '%s' already exists." % name)
def create_user(manager, name, password, tenant):
""" creates a user if it doesn't already exist, as a member of tenant """
users = manager.api.list_users()
if not users or name not in map(lambda u: u[1], users):
manager.api.add_user(name=name, password=password, tenant=tenant)
juju_log("Created new user '%s'" % name)
return
juju_log("A user named '%s' already exists" % name)
def create_role(manager, name, user):
""" creates a role if it doesn't already exist. grants role to user """
roles = manager.api.list_roles()
if not roles or name not in map(lambda r: r[1], roles):
manager.api.add_role(name=name)
juju_log("Created new role '%s'" % name)
else:
juju_log("A role named '%s' already exists" % name)
# NOTE: There does not seem to be any way of querying current role asignment
manager.api.grant_role(name, user)
juju_log("Granted role '%s' to '%s'" % (name, user))
def generate_admin_token(manager, config):
""" generate and add an admin token """
import random
token = random.randrange(1000000000000, 9999999999999)
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?
"""
import manager
create_tenant(manager, "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(manager, config["admin-user"], passwd, tenant="admin")
create_role(manager, "Admin", config["admin-user"])
create_role(manager, "KeystoneAdmin", config["admin-user"])
create_role(manager, "KeystoneServiceAdmin", config["admin-user"])
create_service_entry(manager, "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["ip"], config["service-port"])
admin_url = "http://%s:%s/v2.0" % (config["ip"], config["admin-port"])
internal_url = "http://%s:%s/v2.0" % (config["ip"], config["service-port"])
create_endpoint_template(manager, "RegionOne", "keystone", public_url,
admin_url, internal_url)