#!/usr/bin/env bash

# ``upgrade-nova``

echo "*********************************************************************"
echo "Begin $0"
echo "*********************************************************************"

# Clean up any resources that may be in use
cleanup() {
    set +o errexit

    echo "*********************************************************************"
    echo "ERROR: Abort $0"
    echo "*********************************************************************"

    # Kill ourselves to signal any calling process
    trap 2; kill -2 $$
}

trap cleanup SIGHUP SIGINT SIGTERM

# Keep track of the grenade directory
RUN_DIR=$(cd $(dirname "$0") && pwd)

# Source params
source $GRENADE_DIR/grenaderc

# Import common functions
source $GRENADE_DIR/functions

# This script exits on an error so that errors don't compound and you see
# only the first error that occurred.
set -o errexit

# Upgrade Nova
# ============

# Duplicate some setup bits from target DevStack
source $TARGET_DEVSTACK_DIR/stackrc
source $TARGET_DEVSTACK_DIR/lib/tls
source $TARGET_DEVSTACK_DIR/lib/nova

# Print the commands being run so that we can see the command that triggers
# an error.  It is also useful for following allowing as the install occurs.
set -o xtrace

# Save current config files for posterity
[[ -d $SAVE_DIR/etc.nova ]] || cp -pr $NOVA_CONF_DIR $SAVE_DIR/etc.nova

# calls pre-upgrade hooks for within-$base before we upgrade
upgrade_project nova $RUN_DIR $BASE_DEVSTACK_BRANCH $BASE_DEVSTACK_BRANCH

# install_nova()
stack_install_service nova

# calls upgrade-nova for specific release
upgrade_project nova $RUN_DIR $BASE_DEVSTACK_BRANCH $TARGET_DEVSTACK_BRANCH

# Simulate init_nova()
create_nova_cache_dir
create_nova_keys_dir

# Migrate the database
$NOVA_BIN_DIR/nova-manage --config-file $NOVA_CONF db sync || die $LINENO "DB sync error"

# rolling nova-compute support
if ! should_upgrade "n-cpu"; then
    iniset $NOVA_CONF upgrade_levels compute $(basename $BASE_DEVSTACK_BRANCH)
fi

# Start Nova
start_nova_api
if should_upgrade "n-cpu"; then
    start_nova_compute
fi
start_nova_rest

# Don't succeed unless the services come up
ensure_services_started nova-api nova-conductor
ensure_logs_exist n-api n-cond

if should_upgrade "n-cpu"; then
    ensure_services_started nova-compute
    ensure_logs_exist n-cpu
fi

set +o xtrace
echo "*********************************************************************"
echo "SUCCESS: End $0"
echo "*********************************************************************"