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#!/bin/bash
#
# This script can be used to interact with kolla.

if [[ $EUID -ne 0 ]]; then
    echo "You must execute this script as root." 1>&2
    exit 1
fi

# Move to top level directory
REAL_PATH=$(python -c "import os,sys;print os.path.realpath('$0')")
cd "$(dirname "$REAL_PATH")/.."

NETWORK_MANAGER=$(grep -sri NETWORK_MANAGER ./compose/openstack.env | cut -f2 -d'=')
if [[ -z "$NETWORK_MANAGER" ]]; then
    echo 'No network manager defined in ./compose/openstack.env, defaulting to "neutron".'
    NETWORK_MANAGER="neutron"
fi

function process {
    local service=$1
    echo "$ACTION $service"
    docker-compose -f ./compose/${service}.yml $COMPOSE_CMD
}

function process_all {
    process rabbitmq
    process mariadb
    process keystone
    process glance-api-registry
    process nova-api-conductor-scheduler
    if [[ "${NETWORK_MANAGER}" == "nova" ]] ; then
        process nova-compute-network
    else
        # Defaulting to neutron
        process nova-compute
        process neutron-server
        process neutron-agents
    fi
    process heat-api-engine
    process horizon
}

function check_selinux {
  # Check for SELinux in Enforcing mode and exit if found
  if [[ -x /usr/sbin/getenforce ]]; then
      if [[ $(/usr/sbin/getenforce) == "Enforcing" ]]; then
          echo "You must execute this script without SELinux enforcing mode."
          echo "Turn off SELinux enforcing mode by running:"
          echo "$ sudo setenforce permissive"
          exit 1
      fi
  fi
}

function pre_start {
    check_selinux

    if [[ -r ./openrc ]]; then
        # Source openrc for commands
        source ./openrc
    else
        echo 'Could not find ./openrc; bootstrap your environment with "./tools/genenv".'
        exit 1
    fi
}

function post_start {
    IMAGE_URL=http://download.cirros-cloud.net/0.3.3/
    IMAGE=cirros-0.3.3-x86_64-disk.img
    if ! [ -f "$IMAGE" ]; then
        curl -L -o ./$IMAGE $IMAGE_URL/$IMAGE
    fi

    until keystone user-list | grep glance
    do
        echo "Waiting for OpenStack services to become available"
        sleep 2
    done

    sleep 3

    echo Example Usage:
    echo source openrc # source keystone credentials

    echo Configure your environment once by running:
    echo tools/init-runonce
}

function usage {
    cat <<EOF
Usage: $0 COMMAND

Commands:
    pull    Pull all of the Docker images
    start   Start all kolla containers
    status  List running kolla containers
    stop    Stop all kolla containers
EOF
}

case "$1" in

(pull)
            ACTION="Pulling"
            COMPOSE_CMD="pull"
            process_all
            ;;

(start)
            ACTION="Starting"
            COMPOSE_CMD="up -d"
            pre_start
            process_all
            post_start
            ;;

(status)
            ACTION="Status of"
            COMPOSE_CMD="ps"
            process_all
            ;;

(stop)
            ACTION="Stopping"
            COMPOSE_CMD="stop"
            process_all
            ;;

(*)         usage
            exit 0
            ;;
esac