# lib/ceilometer
# Install and start Ceilometer service
# To enable, add the following to localrc
# ENABLED_SERVICES+=ceilometer-acompute,ceilometer-acentral,ceilometer-collector,ceilometer-api


# Dependencies:
# - functions
# - OS_USERNAME, OS_PASSWORD, OS_TENANT_NAME, OS_AUTH_URL set for admin credentials
# - DEST set to the destination directory
# - NOVA_CONF set to the nova configuration file

# stack.sh
# ---------
# install_XXX
# configure_XXX
# init_XXX
# start_XXX
# stop_XXX
# cleanup_XXX

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


# Defaults
# --------

# set up default directories
CEILOMETER_DIR=$DEST/ceilometer
# Support potential entry-points console scripts
if [ -d $CEILOMETER_DIR/bin ] ; then
    CEILOMETER_BIN_DIR=$CEILOMETER_DIR/bin
else
    CEILOMETER_BIN_DIR=/usr/local/bin
fi
CEILOMETER_CONF_DIR=/etc/ceilometer
CEILOMETER_AGENT_CONF=$CEILOMETER_CONF_DIR/ceilometer-agent.conf
CEILOMETER_COLLECTOR_CONF=$CEILOMETER_CONF_DIR/ceilometer-collector.conf
CEILOMETER_API_LOG_DIR=/var/log/ceilometer-api

# cleanup_ceilometer() - Remove residual data files, anything left over from previous
# runs that a clean run would need to clean up
function cleanup_ceilometer() {
    # This function intentionally left blank
    :
}

# configure_ceilometer() - Set config files, create data dirs, etc
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

    # ceilometer confs are copy of /etc/nova/nova.conf which must exist first
    grep -v format_string $NOVA_CONF > $CEILOMETER_AGENT_CONF
    iniset $CEILOMETER_AGENT_CONF DEFAULT rpc_backend 'ceilometer.openstack.common.rpc.impl_kombu'

    grep -v format_string $NOVA_CONF > $CEILOMETER_COLLECTOR_CONF
    iniset $CEILOMETER_COLLECTOR_CONF DEFAULT rpc_backend 'ceilometer.openstack.common.rpc.impl_kombu'
    iniset $CEILOMETER_COLLECTOR_CONF DEFAULT notification_topics 'notifications,glance_notifications'
}

# install_ceilometer() - Collect source and prepare
function install_ceilometer() {
    git_clone $CEILOMETER_REPO $CEILOMETER_DIR $CEILOMETER_BRANCH
}

# start_ceilometer() - Start running processes, including screen
function start_ceilometer() {
    screen_it ceilometer-acompute "cd $CEILOMETER_DIR && sg libvirtd \"$CEILOMETER_BIN_DIR/ceilometer-agent-compute --config-file $CEILOMETER_AGENT_CONF\""
    screen_it ceilometer-acentral "export OS_USERNAME=$OS_USERNAME OS_PASSWORD=$OS_PASSWORD OS_TENANT_NAME=$OS_TENANT_NAME OS_AUTH_URL=$OS_AUTH_URL && cd $CEILOMETER_DIR && $CEILOMETER_BIN_DIR/ceilometer-agent-central --config-file $CEILOMETER_AGENT_CONF"
    screen_it ceilometer-collector "cd $CEILOMETER_DIR && $CEILOMETER_BIN_DIR/ceilometer-collector --config-file $CEILOMETER_COLLECTOR_CONF"
    screen_it ceilometer-api "cd $CEILOMETER_DIR && $CEILOMETER_BIN_DIR/ceilometer-api -d -v --log-dir=$CEILOMETER_API_LOG_DIR"
}

# stop_ceilometer() - Stop running processes
function stop_ceilometer() {
    # Kill the ceilometer screen windows
    for serv in ceilometer-acompute ceilometer-acentral ceilometer-collector ceilometer-api; do
        screen -S $SCREEN_NAME -p $serv -X kill
    done
}

# Restore xtrace
$XTRACE