#!/bin/bash
#
# lib/zun
# Functions to control the configuration and operation of the **zun** service

# Dependencies:
#
# - ``functions`` file
# - ``DEST``, ``DATA_DIR``, ``STACK_USER`` must be defined
# - ``SERVICE_{TENANT_NAME|PASSWORD}`` must be defined

# ``stack.sh`` calls the entry points in this order:
#
# - install_zun
# - configure_zun
# - create_zun_conf
# - create_zun_accounts
# - init_zun
# - start_zun
# - stop_zun
# - cleanup_zun

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


# Defaults
# --------

# Set up default directories
ZUN_REPO=${ZUN_REPO:-${GIT_BASE}/openstack/zun.git}
ZUN_BRANCH=${ZUN_BRANCH:-$TARGET_BRANCH}
ZUN_DIR=$DEST/zun
ZUN_TEMPEST_PLUGIN_REPO=${ZUN_TEMPEST_PLUGIN_REPO:-${GIT_BASE}/openstack/zun-tempest-plugin.git}
ZUN_TEMPEST_PLUGIN_BRANCH=${ZUN_TEMPEST_PLUGIN_BRANCH:-master}
ZUN_TEMPEST_PLUGIN_DIR=$DEST/zun-tempest-plugin

GITREPO["python-zunclient"]=${ZUNCLIENT_REPO:-${GIT_BASE}/openstack/python-zunclient.git}
GITBRANCH["python-zunclient"]=${ZUNCLIENT_BRANCH:-master}
GITDIR["python-zunclient"]=$DEST/python-zunclient

ZUN_STATE_PATH=${ZUN_STATE_PATH:=$DATA_DIR/zun}
ZUN_AUTH_CACHE_DIR=${ZUN_AUTH_CACHE_DIR:-/var/cache/zun}

ZUN_CONF_DIR=/etc/zun
ZUN_CONF=$ZUN_CONF_DIR/zun.conf
ZUN_API_PASTE=$ZUN_CONF_DIR/api-paste.ini

if is_ssl_enabled_service "zun" || is_service_enabled tls-proxy; then
    ZUN_SERVICE_PROTOCOL="https"
fi

# Toggle for deploying ZUN-API under a wsgi server
ZUN_USE_UWSGI=${ZUN_USE_UWSGI:-True}


# Public facing bits
ZUN_SERVICE_HOST=${ZUN_SERVICE_HOST:-$SERVICE_HOST}
ZUN_SERVICE_PORT=${ZUN_SERVICE_PORT:-9517}
ZUN_SERVICE_PORT_INT=${ZUN_SERVICE_PORT_INT:-19517}
ZUN_SERVICE_PROTOCOL=${ZUN_SERVICE_PROTOCOL:-$SERVICE_PROTOCOL}

ZUN_TRUSTEE_DOMAIN_ADMIN_PASSWORD=${ZUN_TRUSTEE_DOMAIN_ADMIN_PASSWORD:-secret}

# Support entry points installation of console scripts
if [[ -d $ZUN_DIR/bin ]]; then
    ZUN_BIN_DIR=$ZUN_DIR/bin
else
    ZUN_BIN_DIR=$(get_python_exec_prefix)
fi

ZUN_UWSGI=$ZUN_BIN_DIR/zun-api-wsgi
ZUN_UWSGI_CONF=$ZUN_CONF_DIR/zun-api-uwsgi.ini

DOCKER_REMOTE_API_PORT=2375
ZUN_DRIVER=${ZUN_DRIVER:-docker}
ZUN_DB_TYPE=${ZUN_DB_TYPE:-sql}

ZUN_ETCD_VERSION=${ZUN_ETCD_VERSION:-v3.0.13}
ZUN_ETCD_PORT=${ZUN_ETCD_PORT:-2379}
ZUN_WEBSOCKET_PROXY_PORT=${ZUN_WEBSOCKET_PROXY_PORT:-6784}
ZUN_WEBSOCKET_PROXY_IP=${ZUN_WEBSOCKET_PROXY_IP:-$(ipv6_unquote $SERVICE_LISTEN_ADDRESS)}
if is_ubuntu; then
    UBUNTU_RELEASE_BASE_NUM=`lsb_release -r | awk '{print $2}' | cut -d '.' -f 1`
fi

ZUN_DOCKER_IMAGES=${ZUN_DOCKER_IMAGES:-kubernetes/pause}

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

# cleanup_zun() - Remove residual data files, anything left over from previous
# runs that a clean run would need to clean up
function cleanup_zun {
    sudo rm -rf $ZUN_STATE_PATH $ZUN_AUTH_CACHE_DIR

    # Destroy old containers
    local container_name_prefix=${CONTAINER_NAME_PREFIX:-zun-}
    local containers
    containers=`sudo docker ps -a | grep $container_name_prefix | sed "s/.*\($container_name_prefix[0-9a-zA-Z-]*\).*/\1/g"`
    if [ ! "$containers" = "" ]; then
        sudo docker rm -f $containers || true
    fi

    remove_uwsgi_config "$ZUN_UWSGI_CONF" "$ZUN_UWSGI"
    sudo rm -rf $ZUN_CONF_DIR
}

# configure_zun() - Set config files, create data dirs, etc
function configure_zun {
    # Put config files in ``/etc/zun`` for everyone to find
    if [[ ! -d $ZUN_CONF_DIR ]]; then
        sudo mkdir -p $ZUN_CONF_DIR
        sudo chown $STACK_USER $ZUN_CONF_DIR
    fi

    configure_rootwrap zun

    # Rebuild the config file from scratch
    create_zun_conf

    if is_service_enabled zun-api; then
        create_api_paste_conf

        write_uwsgi_config "$ZUN_UWSGI_CONF" "$ZUN_UWSGI" "/container"
    fi
}

# upload_images() - Upload docker images to glance
function upload_images {
    echo_summary "Uploading images"

    if "${ZUN_DRIVER}" == "docker" && is_service_enabled g-api; then
        for image in ${ZUN_DOCKER_IMAGES//,/ }; do
            sudo docker pull $image
            sudo docker save $image | openstack image create $image --public --container-format docker --disk-format raw
        done
    fi
}

# create_zun_accounts() - Set up common required ZUN accounts
#
# Project              User         Roles
# ------------------------------------------------------------------
# SERVICE_PROJECT_NAME  zun         service
function create_zun_accounts {

    create_service_user "zun" "admin"

    if is_service_enabled zun-api; then

        local zun_api_url
        if [[ "$ZUN_USE_UWSGI" == "True" ]]; then
            zun_api_url="$ZUN_SERVICE_PROTOCOL://$ZUN_SERVICE_HOST/container"
        else
            zun_api_url="$ZUN_SERVICE_PROTOCOL://$ZUN_SERVICE_HOST:$ZUN_SERVICE_PORT"
        fi

        local zun_service=$(get_or_create_service "zun" \
            "container" "Container As Service")
        get_or_create_endpoint $zun_service \
            "$REGION_NAME" \
            "$zun_api_url/v1" \
            "$zun_api_url/v1" \
            "$zun_api_url/v1"
    fi

}

# create_zun_conf() - Create a new zun.conf file
function create_zun_conf {

    # (Re)create ``zun.conf``
    rm -f $ZUN_CONF
    if [[ ${ZUN_DRIVER} == "docker" ]]; then
        iniset $ZUN_CONF DEFAULT container_driver docker.driver.DockerDriver
    fi
    iniset $ZUN_CONF DEFAULT debug "$ENABLE_DEBUG_LOG_LEVEL"
    if [[ $SERVICE_IP_VERSION == 6 ]]; then
        iniset $ZUN_CONF DEFAULT my_ip "$HOST_IPV6"
        iniset $ZUN_CONF docker docker_remote_api_host "$HOST_IPV6"
    else
        iniset $ZUN_CONF DEFAULT my_ip "$HOST_IP"
        iniset $ZUN_CONF docker docker_remote_api_host "$HOST_IP"
    fi
    iniset $ZUN_CONF DEFAULT default_cpu 0
    iniset $ZUN_CONF DEFAULT default_memory 0
    iniset $ZUN_CONF DEFAULT default_disk 0
    iniset_rpc_backend zun $ZUN_CONF
    iniset $ZUN_CONF database connection `database_connection_url zun`
    iniset $ZUN_CONF websocket_proxy wsproxy_port "$ZUN_WEBSOCKET_PROXY_PORT"
    iniset $ZUN_CONF websocket_proxy wsproxy_host "$ZUN_WEBSOCKET_PROXY_IP"
    iniset $ZUN_CONF websocket_proxy base_url "ws://${SERVICE_HOST}:${ZUN_WEBSOCKET_PROXY_PORT}/"
    iniset $ZUN_CONF api host_ip "$(ipv6_unquote $ZUN_SERVICE_HOST)"
    iniset $ZUN_CONF api port "$ZUN_SERVICE_PORT"

    iniset $ZUN_CONF keystone_auth auth_type password
    iniset $ZUN_CONF keystone_auth username zun
    iniset $ZUN_CONF keystone_auth password $SERVICE_PASSWORD
    iniset $ZUN_CONF keystone_auth project_name $SERVICE_PROJECT_NAME
    iniset $ZUN_CONF keystone_auth project_domain_id default
    iniset $ZUN_CONF keystone_auth user_domain_id default

    configure_auth_token_middleware $ZUN_CONF zun $ZUN_AUTH_CACHE_DIR

    iniset $ZUN_CONF keystone_auth auth_url $KEYSTONE_AUTH_URI_V3
    # FIXME(pauloewerton): keystone_authtoken section is deprecated. Remove it
    # after deprecation period.
    iniset $ZUN_CONF keystone_authtoken www_authenticate_uri $KEYSTONE_SERVICE_URI_V3
    iniset $ZUN_CONF keystone_authtoken auth_url $KEYSTONE_AUTH_URI_V3
    iniset $ZUN_CONF keystone_authtoken auth_version v3

    iniset $ZUN_CONF glance images_directory $ZUN_STATE_PATH/images

    if is_fedora || is_suse; then
        # zun defaults to /usr/local/bin, but fedora and suse pip like to
        # install things in /usr/bin
        iniset $ZUN_CONF DEFAULT bindir "/usr/bin"
    fi

    if [ -n "$ZUN_STATE_PATH" ]; then
        iniset $ZUN_CONF DEFAULT state_path "$ZUN_STATE_PATH"
        iniset $ZUN_CONF oslo_concurrency lock_path "$ZUN_STATE_PATH"
    fi

    if [ "$SYSLOG" != "False" ]; then
        iniset $ZUN_CONF DEFAULT use_syslog "True"
    fi

    # Format logging
    setup_logging $ZUN_CONF

    # Register SSL certificates if provided
    if is_ssl_enabled_service zun; then
        ensure_certificates zun

        iniset $ZUN_CONF DEFAULT ssl_cert_file "$ZUN_SSL_CERT"
        iniset $ZUN_CONF DEFAULT ssl_key_file "$ZUN_SSL_KEY"

        iniset $ZUN_CONF DEFAULT enabled_ssl_apis "$ZUN_ENABLED_APIS"
    fi

    if is_service_enabled n-cpu; then
        iniset $ZUN_CONF compute host_shared_with_nova "True"
    fi
}

function create_api_paste_conf {
    # copy api_paste.ini
    cp $ZUN_DIR/etc/zun/api-paste.ini $ZUN_API_PASTE
}

# create_zun_cache_dir() - Part of the init_ZUN() process
function create_zun_cache_dir {
    # Create cache dir
    sudo mkdir -p $ZUN_AUTH_CACHE_DIR
    sudo chown $STACK_USER $ZUN_AUTH_CACHE_DIR
    rm -f $ZUN_AUTH_CACHE_DIR/*
}


# init_zun() - Initialize databases, etc.
function init_zun {
    # Only do this step once on the API node for an entire cluster.
    if is_service_enabled zun-api; then
        if is_service_enabled $DATABASE_BACKENDS; then
            # (Re)create zun database
            recreate_database zun

            # Migrate zun database
            $ZUN_BIN_DIR/zun-db-manage upgrade
        fi

        create_zun_cache_dir
    fi
}

# install_zunclient() - Collect source and prepare
function install_zunclient {
    if use_library_from_git "python-zunclient"; then
        git_clone_by_name "python-zunclient"
        setup_dev_lib "python-zunclient"
        sudo install -D -m 0644 -o $STACK_USER {${GITDIR["python-zunclient"]}/tools/,/etc/bash_completion.d/}zun.bash_completion
    fi
}

# install_zun() - Collect source and prepare
function install_zun {
    git_clone $ZUN_REPO $ZUN_DIR $ZUN_BRANCH
    setup_develop $ZUN_DIR

    git_clone $ZUN_TEMPEST_PLUGIN_REPO $ZUN_TEMPEST_PLUGIN_DIR $ZUN_TEMPEST_PLUGIN_BRANCH
    setup_develop $ZUN_TEMPEST_PLUGIN_DIR
}

# start_zun_api() - Start the API process ahead of other things
function start_zun_api {
    # Get right service port for testing
    local service_port=$ZUN_SERVICE_PORT
    local service_protocol=$ZUN_SERVICE_PROTOCOL
    if is_service_enabled tls-proxy; then
        service_port=$ZUN_SERVICE_PORT_INT
        service_protocol="http"
    fi

    local zun_url
    if [ "$ZUN_USE_UWSGI" == "True" ]; then
        run_process zun-api "$ZUN_BIN_DIR/uwsgi --procname-prefix zun-api --ini $ZUN_UWSGI_CONF"
        zun_url=$service_protocol://$ZUN_SERVICE_HOST/container
    else
        run_process zun-api "$ZUN_BIN_DIR/zun-api"
        zun_url=$service_protocol://$ZUN_SERVICE_HOST:$service_port
    fi

    echo "Waiting for zun-api to start..."
    if ! wait_for_service $SERVICE_TIMEOUT $zun_url; then
        die $LINENO "zun-api did not start"
    fi

    # Start proxies if enabled
    if is_service_enabled tls-proxy; then
        start_tls_proxy zun '*' $ZUN_SERVICE_PORT $ZUN_SERVICE_HOST $ZUN_SERVICE_PORT_INT
    fi

    # Start websocket proxy for interactive mode
    if is_service_enabled zun-wsproxy; then
        run_process zun-wsproxy "$ZUN_BIN_DIR/zun-wsproxy"
    fi
}

# start_zun_compute() - Start Zun compute agent
function start_zun_compute {
    echo "Start zun compute..."
    run_process zun-compute "$ZUN_BIN_DIR/zun-compute"
}

# start_zun() - Start running processes, including screen
function start_zun {

    # ``run_process`` checks ``is_service_enabled``, it is not needed here
    start_zun_api
    start_zun_compute
}

# stop_zun() - Stop running processes (non-screen)
function stop_zun {
    if [ "$ZUN_USE_UWSGI" == "True" ]; then
        disable_apache_site zun
        restart_apache_server
    else
        stop_process zun-api
    fi
    stop_process zun-compute
    if is_service_enabled zun-wsproxy; then
        stop_process zun-wsproxy
    fi
}

# Restore xtrace
$XTRACE
