#!/bin/bash
#
# lib/keystone
# Functions to control the configuration and operation of **Keystone**

# Dependencies:
#
# - ``functions`` file
# - ``tls`` file
# - ``DEST``, ``STACK_USER``
# - ``FILES``
# - ``BASE_SQL_CONN``
# - ``SERVICE_HOST``, ``SERVICE_PROTOCOL``
# - ``S3_SERVICE_PORT`` (template backend only)

# ``stack.sh`` calls the entry points in this order:
#
# - install_keystone
# - configure_keystone
# - _config_keystone_apache_wsgi
# - init_keystone
# - start_keystone
# - bootstrap_keystone
# - create_keystone_accounts
# - stop_keystone
# - cleanup_keystone

# Save trace setting
_XTRACE_KEYSTONE=$(set +o | grep xtrace)
set +o xtrace

# Defaults
# --------

# Set up default directories
GITDIR["keystoneauth"]=$DEST/keystoneauth
GITDIR["python-keystoneclient"]=$DEST/python-keystoneclient
GITDIR["keystonemiddleware"]=$DEST/keystonemiddleware
KEYSTONE_DIR=$DEST/keystone

# Keystone virtual environment
if [[ ${USE_VENV} = True ]]; then
    PROJECT_VENV["keystone"]=${KEYSTONE_DIR}.venv
    KEYSTONE_BIN_DIR=${PROJECT_VENV["keystone"]}/bin
else
    KEYSTONE_BIN_DIR=$(get_python_exec_prefix)
fi

KEYSTONE_CONF_DIR=${KEYSTONE_CONF_DIR:-/etc/keystone}
KEYSTONE_CONF=$KEYSTONE_CONF_DIR/keystone.conf
KEYSTONE_PUBLIC_UWSGI_CONF=$KEYSTONE_CONF_DIR/keystone-uwsgi-public.ini
KEYSTONE_PUBLIC_UWSGI=$KEYSTONE_BIN_DIR/keystone-wsgi-public

# KEYSTONE_DEPLOY defines how keystone is deployed, allowed values:
# - mod_wsgi : Run keystone under Apache HTTPd mod_wsgi
# - uwsgi : Run keystone under uwsgi
if [[ "$WSGI_MODE" == "uwsgi" ]]; then
    KEYSTONE_DEPLOY=uwsgi
else
    KEYSTONE_DEPLOY=mod_wsgi
fi

# Select the Identity backend driver
KEYSTONE_IDENTITY_BACKEND=${KEYSTONE_IDENTITY_BACKEND:-sql}

# Select the Assignment backend driver
KEYSTONE_ASSIGNMENT_BACKEND=${KEYSTONE_ASSIGNMENT_BACKEND:-sql}

# Select the Role backend driver
KEYSTONE_ROLE_BACKEND=${KEYSTONE_ROLE_BACKEND:-sql}

# Select the Resource backend driver
KEYSTONE_RESOURCE_BACKEND=${KEYSTONE_RESOURCE_BACKEND:-sql}

# Select Keystone's token provider (and format)
# Refer keystone doc for supported token provider:
# https://docs.openstack.org/keystone/latest/admin/token-provider.html
KEYSTONE_TOKEN_FORMAT=${KEYSTONE_TOKEN_FORMAT:-fernet}
KEYSTONE_TOKEN_FORMAT=$(echo ${KEYSTONE_TOKEN_FORMAT} | tr '[:upper:]' '[:lower:]')

# Public facing bits
KEYSTONE_SERVICE_HOST=${KEYSTONE_SERVICE_HOST:-$SERVICE_HOST}
KEYSTONE_SERVICE_PORT=${KEYSTONE_SERVICE_PORT:-5000}
KEYSTONE_SERVICE_PORT_INT=${KEYSTONE_SERVICE_PORT_INT:-5001}
KEYSTONE_SERVICE_PROTOCOL=${KEYSTONE_SERVICE_PROTOCOL:-$SERVICE_PROTOCOL}

# Set the project for service accounts in Keystone
SERVICE_DOMAIN_NAME=${SERVICE_DOMAIN_NAME:-Default}
SERVICE_PROJECT_NAME=${SERVICE_PROJECT_NAME:-service}

# Note 2016-03 : SERVICE_TENANT_NAME is kept for backwards
# compatibility; we should be using SERVICE_PROJECT_NAME now
SERVICE_TENANT_NAME=${SERVICE_PROJECT_NAME:-service}

# if we are running with SSL use https protocols
if is_service_enabled tls-proxy; then
    KEYSTONE_SERVICE_PROTOCOL="https"
fi

KEYSTONE_SERVICE_URI=${KEYSTONE_SERVICE_PROTOCOL}://${KEYSTONE_SERVICE_HOST}/identity
# for compat
KEYSTONE_AUTH_URI=$KEYSTONE_SERVICE_URI

# V3 URIs
KEYSTONE_AUTH_URI_V3=$KEYSTONE_SERVICE_URI/v3
KEYSTONE_SERVICE_URI_V3=$KEYSTONE_SERVICE_URI/v3

# Security compliance
KEYSTONE_SECURITY_COMPLIANCE_ENABLED=${KEYSTONE_SECURITY_COMPLIANCE_ENABLED:-True}
KEYSTONE_LOCKOUT_FAILURE_ATTEMPTS=${KEYSTONE_LOCKOUT_FAILURE_ATTEMPTS:-2}
KEYSTONE_LOCKOUT_DURATION=${KEYSTONE_LOCKOUT_DURATION:-10}
KEYSTONE_UNIQUE_LAST_PASSWORD_COUNT=${KEYSTONE_UNIQUE_LAST_PASSWORD_COUNT:-2}

# Number of bcrypt hashing rounds, increasing number exponentially increases required
# resources to generate password hash. This is very effective way to protect from
# bruteforce attacks. 4 is minimal value that can be specified for bcrypt and
# it works way faster than default 12. Minimal value is great for CI and development
# however may not be suitable for real production.
KEYSTONE_PASSWORD_HASH_ROUNDS=${KEYSTONE_PASSWORD_HASH_ROUNDS:-4}

# Cache settings
KEYSTONE_ENABLE_CACHE=${KEYSTONE_ENABLE_CACHE:-True}

# Whether to create a keystone admin endpoint for legacy applications
KEYSTONE_ADMIN_ENDPOINT=$(trueorfalse False KEYSTONE_ADMIN_ENDPOINT)

# Functions
# ---------

# Test if Keystone is enabled
# is_keystone_enabled
function is_keystone_enabled {
    [[ ,${DISABLED_SERVICES} =~ ,"keystone" ]] && return 1
    [[ ,${ENABLED_SERVICES}, =~ ,"key", ]] && return 0
    return 1
}

# cleanup_keystone() - Remove residual data files, anything left over from previous
# runs that a clean run would need to clean up
function cleanup_keystone {
    if [ "$KEYSTONE_DEPLOY" == "mod_wsgi" ]; then
        # These files will be created if we are running WSGI_MODE="mod_wsgi"
        disable_apache_site keystone
        sudo rm -f $(apache_site_config_for keystone)
    else
        stop_process "keystone"
        remove_uwsgi_config "$KEYSTONE_PUBLIC_UWSGI_CONF" "$KEYSTONE_PUBLIC_UWSGI"
        sudo rm -f $(apache_site_config_for keystone-wsgi-public)
    fi
}

# _config_keystone_apache_wsgi() - Set WSGI config files of Keystone
function _config_keystone_apache_wsgi {
    local keystone_apache_conf
    keystone_apache_conf=$(apache_site_config_for keystone)
    keystone_ssl_listen="#"
    local keystone_ssl=""
    local keystone_certfile=""
    local keystone_keyfile=""
    local keystone_service_port=$KEYSTONE_SERVICE_PORT
    local venv_path=""

    if is_service_enabled tls-proxy; then
        keystone_service_port=$KEYSTONE_SERVICE_PORT_INT
    fi
    if [[ ${USE_VENV} = True ]]; then
        venv_path="python-path=${PROJECT_VENV["keystone"]}/lib/$(python_version)/site-packages"
    fi

    sudo cp $FILES/apache-keystone.template $keystone_apache_conf
    sudo sed -e "
        s|%PUBLICPORT%|$keystone_service_port|g;
        s|%APACHE_NAME%|$APACHE_NAME|g;
        s|%SSLLISTEN%|$keystone_ssl_listen|g;
        s|%SSLENGINE%|$keystone_ssl|g;
        s|%SSLCERTFILE%|$keystone_certfile|g;
        s|%SSLKEYFILE%|$keystone_keyfile|g;
        s|%USER%|$STACK_USER|g;
        s|%VIRTUALENV%|$venv_path|g
        s|%KEYSTONE_BIN%|$KEYSTONE_BIN_DIR|g
    " -i $keystone_apache_conf
}

# configure_keystone() - Set config files, create data dirs, etc
function configure_keystone {
    sudo install -d -o $STACK_USER $KEYSTONE_CONF_DIR

    if [[ "$KEYSTONE_CONF_DIR" != "$KEYSTONE_DIR/etc" ]]; then
        install -m 600 /dev/null $KEYSTONE_CONF
    fi
    # Populate ``keystone.conf``
    if is_service_enabled ldap; then
        iniset $KEYSTONE_CONF identity domain_config_dir "$KEYSTONE_CONF_DIR/domains"
        iniset $KEYSTONE_CONF identity domain_specific_drivers_enabled "True"
    fi
    iniset $KEYSTONE_CONF identity driver "$KEYSTONE_IDENTITY_BACKEND"
    iniset $KEYSTONE_CONF identity password_hash_rounds $KEYSTONE_PASSWORD_HASH_ROUNDS
    iniset $KEYSTONE_CONF assignment driver "$KEYSTONE_ASSIGNMENT_BACKEND"
    iniset $KEYSTONE_CONF role driver "$KEYSTONE_ROLE_BACKEND"
    iniset $KEYSTONE_CONF resource driver "$KEYSTONE_RESOURCE_BACKEND"

    # Enable caching
    iniset $KEYSTONE_CONF cache enabled $KEYSTONE_ENABLE_CACHE
    iniset $KEYSTONE_CONF cache backend $CACHE_BACKEND
    iniset $KEYSTONE_CONF cache memcache_servers $MEMCACHE_SERVERS

    iniset_rpc_backend keystone $KEYSTONE_CONF oslo_messaging_notifications

    local service_port=$KEYSTONE_SERVICE_PORT

    if is_service_enabled tls-proxy; then
        # Set the service ports for a proxy to take the originals
        service_port=$KEYSTONE_SERVICE_PORT_INT
    fi

    # Override the endpoints advertised by keystone so that clients use the correct
    # endpoint. By default, the keystone server uses the public_port which isn't
    # going to work when you want to use a different port (in the case of proxy),
    # or you don't want the port (in the case of putting keystone on a path in apache).
    iniset $KEYSTONE_CONF DEFAULT public_endpoint $KEYSTONE_SERVICE_URI

    if [[ "$KEYSTONE_TOKEN_FORMAT" != "" ]]; then
        iniset $KEYSTONE_CONF token provider $KEYSTONE_TOKEN_FORMAT
    fi

    iniset $KEYSTONE_CONF database connection `database_connection_url keystone`

    # Set up logging
    if [ "$SYSLOG" != "False" ]; then
        iniset $KEYSTONE_CONF DEFAULT use_syslog "True"
    fi

    # Format logging
    setup_logging $KEYSTONE_CONF

    iniset $KEYSTONE_CONF DEFAULT debug $ENABLE_DEBUG_LOG_LEVEL

    if [ "$KEYSTONE_DEPLOY" == "mod_wsgi" ]; then
        iniset $KEYSTONE_CONF DEFAULT logging_exception_prefix "%(asctime)s.%(msecs)03d %(process)d TRACE %(name)s %(instance)s"
        _config_keystone_apache_wsgi
    else # uwsgi
        write_uwsgi_config "$KEYSTONE_PUBLIC_UWSGI_CONF" "$KEYSTONE_PUBLIC_UWSGI" "/identity"
    fi

    iniset $KEYSTONE_CONF DEFAULT max_token_size 16384

    iniset $KEYSTONE_CONF fernet_tokens key_repository "$KEYSTONE_CONF_DIR/fernet-keys/"

    iniset $KEYSTONE_CONF credential key_repository "$KEYSTONE_CONF_DIR/credential-keys/"

    # Configure the project created by the 'keystone-manage bootstrap' as the cloud-admin project.
    # The users from this project are globally admin as before, but it also
    # allows policy changes in order to clarify the adminess scope.
    #iniset $KEYSTONE_CONF resource admin_project_domain_name Default
    #iniset $KEYSTONE_CONF resource admin_project_name admin

    if [[ "$KEYSTONE_SECURITY_COMPLIANCE_ENABLED" = True ]]; then
        iniset $KEYSTONE_CONF security_compliance lockout_failure_attempts $KEYSTONE_LOCKOUT_FAILURE_ATTEMPTS
        iniset $KEYSTONE_CONF security_compliance lockout_duration $KEYSTONE_LOCKOUT_DURATION
        iniset $KEYSTONE_CONF security_compliance unique_last_password_count $KEYSTONE_UNIQUE_LAST_PASSWORD_COUNT
    fi
}

# create_keystone_accounts() - Sets up common required keystone accounts

# Project              User       Roles
# ------------------------------------------------------------------
# admin                admin      admin
# service              --         --
# --                   --         service
# --                   --         ResellerAdmin
# --                   --         member
# demo                 admin      admin
# demo                 demo       member, anotherrole
# alt_demo             admin      admin
# alt_demo             alt_demo   member, anotherrole
# invisible_to_admin   demo       member

# Group                Users            Roles                 Project
# ------------------------------------------------------------------
# admins               admin            admin                 admin
# nonadmins            demo, alt_demo   member, anotherrole   demo, alt_demo

# System               User            Roles
# ------------------------------------------------------------------
# all                  admin           admin
# all                  system_reader   reader
# all                  system_member   member


# Migrated from keystone_data.sh
function create_keystone_accounts {

    # The keystone bootstrapping process (performed via keystone-manage
    # bootstrap) creates an admin user and an admin
    # project. As a sanity check we exercise the CLI to retrieve the IDs for
    # these values.
    local admin_project
    admin_project=$(openstack project show "admin" -f value -c id)
    local admin_user
    admin_user=$(openstack user show "admin" -f value -c id)
    # These roles are also created during bootstrap but we don't need their IDs
    local admin_role="admin"
    local member_role="member"
    local reader_role="reader"

    async_run ks-domain-role get_or_add_user_domain_role $admin_role $admin_user default

    # Create service project/role
    get_or_create_domain "$SERVICE_DOMAIN_NAME"
    async_run ks-project get_or_create_project "$SERVICE_PROJECT_NAME" "$SERVICE_DOMAIN_NAME"

    # Service role, so service users do not have to be admins
    async_run ks-service get_or_create_role service

    # The ResellerAdmin role is used by Nova and Ceilometer so we need to keep it.
    # The admin role in swift allows a user to act as an admin for their project,
    # but ResellerAdmin is needed for a user to act as any project. The name of this
    # role is also configurable in swift-proxy.conf
    async_run ks-reseller get_or_create_role ResellerAdmin

    # another_role demonstrates that an arbitrary role may be created and used
    # TODO(sleepsonthefloor): show how this can be used for rbac in the future!
    local another_role="anotherrole"
    async_run ks-anotherrole get_or_create_role $another_role

    # invisible project - admin can't see this one
    local invis_project
    invis_project=$(get_or_create_project "invisible_to_admin" default)

    # demo
    local demo_project
    demo_project=$(get_or_create_project "demo" default)
    local demo_user
    demo_user=$(get_or_create_user "demo" \
        "$ADMIN_PASSWORD" "default" "demo@example.com")

    async_wait ks-{domain-role,domain,project,service,reseller,anotherrole}

    async_run ks-demo-member get_or_add_user_project_role $member_role $demo_user $demo_project

    async_run ks-demo-admin get_or_add_user_project_role $admin_role $admin_user $demo_project
    async_run ks-demo-another get_or_add_user_project_role $another_role $demo_user $demo_project
    async_run ks-demo-invis get_or_add_user_project_role $member_role $demo_user $invis_project

    # Create a user to act as a reader on project demo
    local demo_reader
    demo_reader=$(get_or_create_user "demo_reader" \
        "$ADMIN_PASSWORD" "default" "demo_reader@example.com")

    async_run ks-demo-reader get_or_add_user_project_role $reader_role $demo_reader $demo_project

    # Create a different project called alt_demo
    local alt_demo_project
    alt_demo_project=$(get_or_create_project "alt_demo" default)
    # Create a user to act as member, admin and anotherrole on project alt_demo
    local alt_demo_user
    alt_demo_user=$(get_or_create_user "alt_demo" \
        "$ADMIN_PASSWORD" "default" "alt_demo@example.com")

    async_run ks-alt-admin get_or_add_user_project_role $admin_role $alt_demo_user $alt_demo_project
    async_run ks-alt-another get_or_add_user_project_role $another_role $alt_demo_user $alt_demo_project

    # Create another user to act as a member on project alt_demo
    local alt_demo_member
    alt_demo_member=$(get_or_create_user "alt_demo_member" \
        "$ADMIN_PASSWORD" "default" "alt_demo_member@example.com")
    async_run ks-alt-member-user get_or_add_user_project_role $member_role $alt_demo_member $alt_demo_project

    # Create another user to act as a reader on project alt_demo
    local alt_demo_reader
    alt_demo_reader=$(get_or_create_user "alt_demo_reader" \
        "$ADMIN_PASSWORD" "default" "alt_demo_reader@example.com")
    async_run ks-alt-reader-user get_or_add_user_project_role $reader_role $alt_demo_reader $alt_demo_project

    # Create two users, give one the member role on the system and the other the
    # reader role on the system. These two users model system-member and
    # system-reader personas. The admin user already has the admin role on the
    # system and we can re-use this user as a system-admin.
    system_member_user=$(get_or_create_user "system_member" \
        "$ADMIN_PASSWORD" "default" "system_member@example.com")
    async_run ks-system-member get_or_add_user_system_role $member_role $system_member_user "all"

    system_reader_user=$(get_or_create_user "system_reader" \
        "$ADMIN_PASSWORD" "default" "system_reader@example.com")
    async_run ks-system-reader get_or_add_user_system_role $reader_role $system_reader_user "all"

    # groups
    local admin_group
    admin_group=$(get_or_create_group "admins" \
        "default" "openstack admin group")
    local non_admin_group
    non_admin_group=$(get_or_create_group "nonadmins" \
        "default" "non-admin group")

    async_run ks-group-memberdemo get_or_add_group_project_role $member_role $non_admin_group $demo_project
    async_run ks-group-anotherdemo get_or_add_group_project_role $another_role $non_admin_group $demo_project
    async_run ks-group-memberalt get_or_add_group_project_role $member_role $non_admin_group $alt_demo_project
    async_run ks-group-anotheralt get_or_add_group_project_role $another_role $non_admin_group $alt_demo_project
    async_run ks-group-admin get_or_add_group_project_role $admin_role $admin_group $admin_project

    async_wait ks-demo-{member,admin,another,invis,reader}
    async_wait ks-alt-{admin,another,member-user,reader-user}
    async_wait ks-system-{member,reader}
    async_wait ks-group-{memberdemo,anotherdemo,memberalt,anotheralt,admin}

    if is_service_enabled ldap; then
        create_ldap_domain
    fi
}

# Create a user that is capable of verifying keystone tokens for use with auth_token middleware.
#
# create_service_user <name> [role]
#
# We always add the service role, other roles are also allowed to be added as historically
# a lot of projects have configured themselves with the admin or other role here if they are
# using this user for other purposes beyond simply auth_token middleware.
function create_service_user {
    get_or_create_user "$1" "$SERVICE_PASSWORD" "$SERVICE_DOMAIN_NAME"
    get_or_add_user_project_role service "$1" "$SERVICE_PROJECT_NAME" "$SERVICE_DOMAIN_NAME" "$SERVICE_DOMAIN_NAME"

    if [[ -n "$2" ]]; then
        get_or_add_user_project_role "$2" "$1" "$SERVICE_PROJECT_NAME" "$SERVICE_DOMAIN_NAME" "$SERVICE_DOMAIN_NAME"
    fi
}

# Configure a service to use the auth token middleware.
#
# configure_keystone_authtoken_middleware conf_file admin_user IGNORED [section]
#
# section defaults to keystone_authtoken, which is where auth_token looks in
# the .conf file. If the paste config file is used (api-paste.ini) then
# provide the section name for the auth_token filter.
function configure_keystone_authtoken_middleware {
    local conf_file=$1
    local admin_user=$2
    local section=${3:-keystone_authtoken}

    iniset $conf_file $section auth_type password
    iniset $conf_file $section interface public
    iniset $conf_file $section auth_url $KEYSTONE_SERVICE_URI
    iniset $conf_file $section username $admin_user
    iniset $conf_file $section password $SERVICE_PASSWORD
    iniset $conf_file $section user_domain_name "$SERVICE_DOMAIN_NAME"
    iniset $conf_file $section project_name $SERVICE_PROJECT_NAME
    iniset $conf_file $section project_domain_name "$SERVICE_DOMAIN_NAME"

    iniset $conf_file $section cafile $SSL_BUNDLE_FILE
    iniset $conf_file $section memcached_servers $MEMCACHE_SERVERS
}

# configure_auth_token_middleware conf_file admin_user IGNORED [section]
# TODO(frickler): old function for backwards compatibility, remove in U cycle
function configure_auth_token_middleware {
    echo "WARNING: configure_auth_token_middleware is deprecated, use configure_keystone_authtoken_middleware instead"
    configure_keystone_authtoken_middleware $1 $2 $4
}

# init_keystone() - Initialize databases, etc.
function init_keystone {
    if is_service_enabled ldap; then
        init_ldap
    fi

    if [[ "$RECREATE_KEYSTONE_DB" == True ]]; then
        # (Re)create keystone database
        recreate_database keystone
    fi

    time_start "dbsync"
    # Initialize keystone database
    $KEYSTONE_BIN_DIR/keystone-manage --config-file $KEYSTONE_CONF db_sync
    time_stop "dbsync"

    if [[ "$KEYSTONE_TOKEN_FORMAT" == "fernet" ]]; then
        rm -rf "$KEYSTONE_CONF_DIR/fernet-keys/"
        $KEYSTONE_BIN_DIR/keystone-manage --config-file $KEYSTONE_CONF fernet_setup
    fi
    rm -rf "$KEYSTONE_CONF_DIR/credential-keys/"
    $KEYSTONE_BIN_DIR/keystone-manage --config-file $KEYSTONE_CONF credential_setup

}

# install_keystoneauth() - Collect source and prepare
function install_keystoneauth {
    if use_library_from_git "keystoneauth"; then
        git_clone_by_name "keystoneauth"
        setup_dev_lib "keystoneauth"
    fi
}

# install_keystoneclient() - Collect source and prepare
function install_keystoneclient {
    if use_library_from_git "python-keystoneclient"; then
        git_clone_by_name "python-keystoneclient"
        setup_dev_lib "python-keystoneclient"
    fi
}

# install_keystonemiddleware() - Collect source and prepare
function install_keystonemiddleware {
    # install_keystonemiddleware() is called when keystonemiddleware is needed
    # to provide an opportunity to install it from the source repo
    if use_library_from_git "keystonemiddleware"; then
        git_clone_by_name "keystonemiddleware"
        setup_dev_lib "keystonemiddleware"
    else
        # When not installing from repo, keystonemiddleware is still needed...
        pip_install_gr keystonemiddleware
    fi
    # Install the memcache library so keystonemiddleware can cache tokens in a
    # shared location.
    pip_install_gr python-memcached
}

# install_keystone() - Collect source and prepare
function install_keystone {
    # only install ldap if the service has been enabled
    if is_service_enabled ldap; then
        install_ldap
    fi

    git_clone $KEYSTONE_REPO $KEYSTONE_DIR $KEYSTONE_BRANCH
    setup_develop $KEYSTONE_DIR

    if is_service_enabled ldap; then
        setup_develop $KEYSTONE_DIR ldap
    fi

    if [ "$KEYSTONE_DEPLOY" == "mod_wsgi" ]; then
        install_apache_wsgi
    fi
}

# start_keystone() - Start running processes
function start_keystone {
    # Get right service port for testing
    local service_port=$KEYSTONE_SERVICE_PORT
    local auth_protocol=$KEYSTONE_SERVICE_PROTOCOL
    if is_service_enabled tls-proxy; then
        service_port=$KEYSTONE_SERVICE_PORT_INT
        auth_protocol="http"
    fi

    if [ "$KEYSTONE_DEPLOY" == "mod_wsgi" ]; then
        enable_apache_site keystone
        restart_apache_server
    else # uwsgi
        run_process keystone "$(which uwsgi) --procname-prefix keystone --ini $KEYSTONE_PUBLIC_UWSGI_CONF" ""
    fi

    echo "Waiting for keystone to start..."
    # Check that the keystone service is running. Even if the tls tunnel
    # should be enabled, make sure the internal port is checked using
    # unencryted traffic at this point.
    # If running in Apache, use the path rather than port.

    local service_uri=$auth_protocol://$KEYSTONE_SERVICE_HOST/identity/v3/

    if ! wait_for_service $SERVICE_TIMEOUT $service_uri; then
        die $LINENO "keystone did not start"
    fi

    # Start proxies if enabled
    if is_service_enabled tls-proxy; then
        start_tls_proxy keystone-service '*' $KEYSTONE_SERVICE_PORT $KEYSTONE_SERVICE_HOST $KEYSTONE_SERVICE_PORT_INT
    fi

    # (re)start memcached to make sure we have a clean memcache.
    restart_service memcached
}

# stop_keystone() - Stop running processes
function stop_keystone {
    if [ "$KEYSTONE_DEPLOY" == "mod_wsgi" ]; then
        disable_apache_site keystone
        restart_apache_server
    else
        stop_process keystone
    fi
}

# bootstrap_keystone() - Initialize user, role and project
# This function uses the following GLOBAL variables:
# - ``KEYSTONE_BIN_DIR``
# - ``ADMIN_PASSWORD``
# - ``REGION_NAME``
# - ``KEYSTONE_SERVICE_URI``
function bootstrap_keystone {
    $KEYSTONE_BIN_DIR/keystone-manage bootstrap \
        --bootstrap-username admin \
        --bootstrap-password "$ADMIN_PASSWORD" \
        --bootstrap-project-name admin \
        --bootstrap-role-name admin \
        --bootstrap-service-name keystone \
        --bootstrap-region-id "$REGION_NAME" \
        --bootstrap-public-url "$KEYSTONE_SERVICE_URI"
    if [ "$KEYSTONE_ADMIN_ENDPOINT" == "True" ]; then
        openstack endpoint create --region "$REGION_NAME" \
            --os-username admin \
            --os-user-domain-id default \
            --os-password "$ADMIN_PASSWORD" \
            --os-project-name admin \
            --os-project-domain-id default \
            keystone admin "$KEYSTONE_SERVICE_URI"
    fi
}

# create_ldap_domain() - Create domain file and initialize domain with a user
function create_ldap_domain {
    # Creates domain Users
    openstack --os-identity-api-version=3 domain create --description "LDAP domain" Users

    # Create domain file inside etc/keystone/domains
    KEYSTONE_LDAP_DOMAIN_FILE=$KEYSTONE_CONF_DIR/domains/keystone.Users.conf
    mkdir -p "$KEYSTONE_CONF_DIR/domains"
    touch "$KEYSTONE_LDAP_DOMAIN_FILE"

    # Set identity driver 'ldap'
    iniset $KEYSTONE_LDAP_DOMAIN_FILE identity driver "ldap"

    # LDAP settings for Users domain
    iniset $KEYSTONE_LDAP_DOMAIN_FILE ldap user_tree_dn "ou=Users,$LDAP_BASE_DN"
    iniset $KEYSTONE_LDAP_DOMAIN_FILE ldap user_objectclass "inetOrgPerson"
    iniset $KEYSTONE_LDAP_DOMAIN_FILE ldap user_name_attribute "cn"
    iniset $KEYSTONE_LDAP_DOMAIN_FILE ldap user_mail_attribute "mail"
    iniset $KEYSTONE_LDAP_DOMAIN_FILE ldap user_id_attribute "uid"
    iniset $KEYSTONE_LDAP_DOMAIN_FILE ldap user "cn=Manager,dc=openstack,dc=org"
    iniset $KEYSTONE_LDAP_DOMAIN_FILE ldap url "ldap://localhost"
    iniset $KEYSTONE_LDAP_DOMAIN_FILE ldap suffix $LDAP_BASE_DN
    iniset $KEYSTONE_LDAP_DOMAIN_FILE ldap password $LDAP_PASSWORD
    iniset $KEYSTONE_LDAP_DOMAIN_FILE ldap group_tree_dn "ou=Groups,$LDAP_BASE_DN"
    iniset $KEYSTONE_LDAP_DOMAIN_FILE ldap group_objectclass "groupOfNames"
    iniset $KEYSTONE_LDAP_DOMAIN_FILE ldap group_name_attribute "cn"
    iniset $KEYSTONE_LDAP_DOMAIN_FILE ldap group_id_attribute "cn"

    # Restart apache and identity services to associate domain and conf file
    sudo service apache2 reload
    sudo systemctl restart devstack@keystone

    # Create LDAP user.ldif and add user to LDAP backend
    local tmp_ldap_dir
    tmp_ldap_dir=$(mktemp -d -t ldap.$$.XXXXXXXXXX)

    _ldap_varsubst $FILES/ldap/user.ldif.in $slappass >$tmp_ldap_dir/user.ldif
    sudo ldapadd -x -w $LDAP_PASSWORD -D "$LDAP_MANAGER_DN" -H $LDAP_URL -c -f $tmp_ldap_dir/user.ldif
    rm -rf $tmp_ldap_dir

    local admin_project
    admin_project=$(get_or_create_project "admin" default)
    local ldap_user
    ldap_user=$(openstack user show --domain=Users demo -f value -c id)
    local admin_role="admin"
    get_or_create_role $admin_role

    # Grant demo LDAP user access to project and role
    get_or_add_user_project_role $admin_role $ldap_user $admin_project
}

# Restore xtrace
$_XTRACE_KEYSTONE

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