Failed to install ceilometer on Ubuntu, when mongodb is not running

[YangLei]

mongo ceilometer --eval "db.dropDatabase();"
MongoDB shell version: 2.0.4
connecting to: ceilometer
Wed May 22 16:56:17 Error: couldn't connect to server 127.0.0.1 shell/mongo.js:84
exception: connect failed

------
devstack/lib/ceilometer

function configure_ceilometer() {
    setup_develop $CEILOMETER_DIR

    [ ! -d $CEILOMETER_CONF_DIR ] && sudo mkdir -m 755 -p $CEILOMETER_CONF_DIR
    sudo chown $USER $CEILOMETER_CONF_DIR

    [ ! -d $CEILOMETER_API_LOG_DIR ] && sudo mkdir -m 755 -p $CEILOMETER_API_LOG_DIR
    sudo chown $USER $CEILOMETER_API_LOG_DIR

    iniset_rpc_backend ceilometer $CEILOMETER_CONF DEFAULT

    iniset $CEILOMETER_CONF DEFAULT notification_topics 'notifications'
    iniset $CEILOMETER_CONF DEFAULT verbose True

    # Install the policy file for the API server
    cp $CEILOMETER_DIR/etc/ceilometer/policy.json $CEILOMETER_CONF_DIR
    cp $CEILOMETER_DIR/etc/ceilometer/pipeline.yaml $CEILOMETER_CONF_DIR
    iniset $CEILOMETER_CONF DEFAULT policy_file $CEILOMETER_CONF_DIR/policy.json

    # the compute and central agents need these credentials in order to
    # call out to the public nova and glance APIs
    iniset $CEILOMETER_CONF DEFAULT os_username ceilometer
    iniset $CEILOMETER_CONF DEFAULT os_password $SERVICE_PASSWORD
    iniset $CEILOMETER_CONF DEFAULT os_tenant_name $SERVICE_TENANT_NAME
    iniset $CEILOMETER_CONF DEFAULT os_auth_url $OS_AUTH_URL

    iniset $CEILOMETER_CONF keystone_authtoken auth_protocol http
    iniset $CEILOMETER_CONF keystone_authtoken admin_user ceilometer
    iniset $CEILOMETER_CONF keystone_authtoken admin_password $SERVICE_PASSWORD
    iniset $CEILOMETER_CONF keystone_authtoken admin_tenant_name $SERVICE_TENANT_NAME
    iniset $CEILOMETER_CONF keystone_authtoken signing_dir $CEILOMETER_AUTH_CACHE_DIR

    configure_mongodb

    cleanup_ceilometer
}

# cleanup_ceilometer() - Remove residual data files, anything left over from previous
# runs that a clean run would need to clean up
function cleanup_ceilometer() {
    mongo ceilometer --eval "db.dropDatabase();"
}

[YangLei (yanglyy)]

Can devstack do some check for the mongo service, before devstack install/config the ceilometer?

[Dean Troyer (dtroyer)]

https://review.openstack.org/43851 completed the change to mysql as the default backend