# lib/cinder
# Install and start Cinder volume service

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

# stack.sh
# ---------
# install_cinder
# configure_cinder
# init_cinder
# start_cinder
# stop_cinder
# cleanup_cinder

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


# Defaults
# --------

# set up default driver
CINDER_DRIVER=${CINDER_DRIVER:-default}

# set up default directories
CINDER_DIR=$DEST/cinder
CINDERCLIENT_DIR=$DEST/python-cinderclient
CINDER_STATE_PATH=${CINDER_STATE_PATH:=$DATA_DIR/cinder}
CINDER_CONF_DIR=/etc/cinder
CINDER_CONF=$CINDER_CONF_DIR/cinder.conf
CINDER_AUTH_CACHE_DIR=${CINDER_AUTH_CACHE_DIR:-/var/cache/cinder}

# Support entry points installation of console scripts
if [[ -d $CINDER_DIR/bin ]]; then
    CINDER_BIN_DIR=$CINDER_DIR/bin
else
    CINDER_BIN_DIR=/usr/local/bin
fi

# Name of the lvm volume group to use/create for iscsi volumes
VOLUME_GROUP=${VOLUME_GROUP:-stack-volumes}
VOLUME_NAME_PREFIX=${VOLUME_NAME_PREFIX:-volume-}

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

# configure_cinder() - Set config files, create data dirs, etc
function configure_cinder() {
    setup_develop $CINDER_DIR
    setup_develop $CINDERCLIENT_DIR

    if [[ ! -d $CINDER_CONF_DIR ]]; then
        sudo mkdir -p $CINDER_CONF_DIR
    fi
    sudo chown `whoami` $CINDER_CONF_DIR

    cp -p $CINDER_DIR/etc/cinder/policy.json $CINDER_CONF_DIR

    # Set the paths of certain binaries
    CINDER_ROOTWRAP=$(get_rootwrap_location cinder)

    # If Cinder ships the new rootwrap filters files, deploy them
    # (owned by root) and add a parameter to $CINDER_ROOTWRAP
    ROOTWRAP_CINDER_SUDOER_CMD="$CINDER_ROOTWRAP"
    if [[ -d $CINDER_DIR/etc/cinder/rootwrap.d ]]; then
        # Wipe any existing rootwrap.d files first
        if [[ -d $CINDER_CONF_DIR/rootwrap.d ]]; then
            sudo rm -rf $CINDER_CONF_DIR/rootwrap.d
        fi
        # Deploy filters to /etc/cinder/rootwrap.d
        sudo mkdir -m 755 $CINDER_CONF_DIR/rootwrap.d
        sudo cp $CINDER_DIR/etc/cinder/rootwrap.d/*.filters $CINDER_CONF_DIR/rootwrap.d
        sudo chown -R root:root $CINDER_CONF_DIR/rootwrap.d
        sudo chmod 644 $CINDER_CONF_DIR/rootwrap.d/*
        # Set up rootwrap.conf, pointing to /etc/cinder/rootwrap.d
        sudo cp $CINDER_DIR/etc/cinder/rootwrap.conf $CINDER_CONF_DIR/
        sudo sed -e "s:^filters_path=.*$:filters_path=$CINDER_CONF_DIR/rootwrap.d:" -i $CINDER_CONF_DIR/rootwrap.conf
        sudo chown root:root $CINDER_CONF_DIR/rootwrap.conf
        sudo chmod 0644 $CINDER_CONF_DIR/rootwrap.conf
        # Specify rootwrap.conf as first parameter to cinder-rootwrap
        CINDER_ROOTWRAP="$CINDER_ROOTWRAP $CINDER_CONF_DIR/rootwrap.conf"
        ROOTWRAP_CINDER_SUDOER_CMD="$CINDER_ROOTWRAP *"
    fi

    TEMPFILE=`mktemp`
    echo "$USER ALL=(root) NOPASSWD: $ROOTWRAP_CINDER_SUDOER_CMD" >$TEMPFILE
    chmod 0440 $TEMPFILE
    sudo chown root:root $TEMPFILE
    sudo mv $TEMPFILE /etc/sudoers.d/cinder-rootwrap

    CINDER_API_PASTE_INI=$CINDER_CONF_DIR/api-paste.ini
    cp $CINDER_DIR/etc/cinder/api-paste.ini $CINDER_API_PASTE_INI
    iniset $CINDER_API_PASTE_INI filter:authtoken auth_host $KEYSTONE_AUTH_HOST
    iniset $CINDER_API_PASTE_INI filter:authtoken auth_port $KEYSTONE_AUTH_PORT
    iniset $CINDER_API_PASTE_INI filter:authtoken auth_protocol $KEYSTONE_AUTH_PROTOCOL
    iniset $CINDER_API_PASTE_INI filter:authtoken admin_tenant_name $SERVICE_TENANT_NAME
    iniset $CINDER_API_PASTE_INI filter:authtoken admin_user cinder
    iniset $CINDER_API_PASTE_INI filter:authtoken admin_password $SERVICE_PASSWORD
    iniset $CINDER_API_PASTE_INI filter:authtoken signing_dir $CINDER_AUTH_CACHE_DIR

    cp $CINDER_DIR/etc/cinder/cinder.conf.sample $CINDER_CONF
    iniset $CINDER_CONF DEFAULT auth_strategy keystone
    iniset $CINDER_CONF DEFAULT verbose True
    iniset $CINDER_CONF DEFAULT volume_group $VOLUME_GROUP
    iniset $CINDER_CONF DEFAULT volume_name_template ${VOLUME_NAME_PREFIX}%s
    iniset $CINDER_CONF DEFAULT iscsi_helper tgtadm
    local dburl
    database_connection_url dburl cinder
    iniset $CINDER_CONF DEFAULT sql_connection $dburl
    iniset $CINDER_CONF DEFAULT api_paste_config $CINDER_API_PASTE_INI
    iniset $CINDER_CONF DEFAULT root_helper "sudo ${CINDER_ROOTWRAP}"
    iniset $CINDER_CONF DEFAULT osapi_volume_extension cinder.api.openstack.volume.contrib.standard_extensions
    iniset $CINDER_CONF DEFAULT state_path $CINDER_STATE_PATH

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

    if is_service_enabled qpid ; then
        iniset $CINDER_CONF DEFAULT rpc_backend cinder.openstack.common.rpc.impl_qpid
    elif is_service_enabled zeromq; then
        iniset $CINDER_CONF DEFAULT rpc_backend nova.openstack.common.rpc.impl_zmq
    elif [ -n "$RABBIT_HOST" ] &&  [ -n "$RABBIT_PASSWORD" ]; then
        iniset $CINDER_CONF DEFAULT rabbit_host $RABBIT_HOST
        iniset $CINDER_CONF DEFAULT rabbit_password $RABBIT_PASSWORD
    fi

    if [[ "$CINDER_SECURE_DELETE" == "False" ]]; then
        iniset $CINDER_CONF DEFAULT secure_delete False
    fi

    if [ "$LOG_COLOR" == "True" ] && [ "$SYSLOG" == "False" ]; then
        # Add color to logging output
        iniset $CINDER_CONF DEFAULT logging_context_format_string "%(asctime)s %(color)s%(levelname)s %(name)s [[01;36m%(request_id)s [00;36m%(user_id)s %(project_id)s%(color)s] [01;35m%(instance)s%(color)s%(message)s[00m"
        iniset $CINDER_CONF DEFAULT logging_default_format_string "%(asctime)s %(color)s%(levelname)s %(name)s [[00;36m-%(color)s] [01;35m%(instance)s%(color)s%(message)s[00m"
        iniset $CINDER_CONF DEFAULT logging_debug_format_suffix "[00;33mfrom (pid=%(process)d) %(funcName)s %(pathname)s:%(lineno)d[00m"
        iniset $CINDER_CONF DEFAULT logging_exception_prefix "%(color)s%(asctime)s TRACE %(name)s [01;35m%(instance)s[00m"
    fi

    if [ "$CINDER_DRIVER" == "XenAPINFS" ]; then
        (
            set -u
            iniset $CINDER_CONF DEFAULT volume_driver "cinder.volume.drivers.xenapi.sm.XenAPINFSDriver"
            iniset $CINDER_CONF DEFAULT xenapi_connection_url "$CINDER_XENAPI_CONNECTION_URL"
            iniset $CINDER_CONF DEFAULT xenapi_connection_username "$CINDER_XENAPI_CONNECTION_USERNAME"
            iniset $CINDER_CONF DEFAULT xenapi_connection_password "$CINDER_XENAPI_CONNECTION_PASSWORD"
            iniset $CINDER_CONF DEFAULT xenapi_nfs_server "$CINDER_XENAPI_NFS_SERVER"
            iniset $CINDER_CONF DEFAULT xenapi_nfs_serverpath "$CINDER_XENAPI_NFS_SERVERPATH"
        )
    fi
}

# init_cinder() - Initialize database and volume group
function init_cinder() {
    # Force nova volumes off
    NOVA_ENABLED_APIS=$(echo $NOVA_ENABLED_APIS | sed "s/osapi_volume,//")

    if is_service_enabled $DATABASE_BACKENDS; then
        # (re)create cinder database
        recreate_database cinder utf8

        # (re)create cinder database
        $CINDER_BIN_DIR/cinder-manage db sync
    fi

    if is_service_enabled c-vol; then
        # Configure a default volume group called '`stack-volumes`' for the volume
        # service if it does not yet exist.  If you don't wish to use a file backed
        # volume group, create your own volume group called ``stack-volumes`` before
        # invoking ``stack.sh``.
        #
        # By default, the backing file is 5G in size, and is stored in ``/opt/stack/data``.

        if ! sudo vgs $VOLUME_GROUP; then
            VOLUME_BACKING_FILE=${VOLUME_BACKING_FILE:-$DATA_DIR/${VOLUME_GROUP}-backing-file}
            # Only create if the file doesn't already exists
            [[ -f $VOLUME_BACKING_FILE ]] || truncate -s $VOLUME_BACKING_FILE_SIZE $VOLUME_BACKING_FILE
            DEV=`sudo losetup -f --show $VOLUME_BACKING_FILE`
            # Only create if the loopback device doesn't contain $VOLUME_GROUP
            if ! sudo vgs $VOLUME_GROUP; then sudo vgcreate $VOLUME_GROUP $DEV; fi
        fi

        mkdir -p $CINDER_STATE_PATH/volumes

        if sudo vgs $VOLUME_GROUP; then
            if is_fedora || is_suse; then
                # service is not started by default
                start_service tgtd
            fi

            # Remove iscsi targets
            sudo tgtadm --op show --mode target | grep $VOLUME_NAME_PREFIX | grep Target | cut -f3 -d ' ' | sudo xargs -n1 tgt-admin --delete || true
            # Clean out existing volumes
            for lv in `sudo lvs --noheadings -o lv_name $VOLUME_GROUP`; do
                # VOLUME_NAME_PREFIX prefixes the LVs we want
                if [[ "${lv#$VOLUME_NAME_PREFIX}" != "$lv" ]]; then
                    sudo lvremove -f $VOLUME_GROUP/$lv
                fi
            done
        fi
    fi

    # Create cache dir
    sudo mkdir -p $CINDER_AUTH_CACHE_DIR
    sudo chown `whoami` $CINDER_AUTH_CACHE_DIR
}

# install_cinder() - Collect source and prepare
function install_cinder() {
    git_clone $CINDER_REPO $CINDER_DIR $CINDER_BRANCH
    git_clone $CINDERCLIENT_REPO $CINDERCLIENT_DIR $CINDERCLIENT_BRANCH
}

# apply config.d approach (e.g. Oneiric does not have this)
function _configure_tgt_for_config_d() {
    if [[ ! -d /etc/tgt/conf.d/ ]]; then
        sudo mkdir -p /etc/tgt/conf.d
        echo "include /etc/tgt/conf.d/*.conf" | sudo tee -a /etc/tgt/targets.conf
    fi
}

# start_cinder() - Start running processes, including screen
function start_cinder() {
    if is_service_enabled c-vol; then
        _configure_tgt_for_config_d
        if [[ ! -f /etc/tgt/conf.d/stack.conf ]]; then
            echo "include $CINDER_STATE_PATH/volumes/*" | sudo tee /etc/tgt/conf.d/stack.conf
        fi
        if is_ubuntu; then
            # tgt in oneiric doesn't restart properly if tgtd isn't running
            # do it in two steps
            sudo stop tgt || true
            sudo start tgt
        elif is_fedora; then
            # bypass redirection to systemctl during restart
            sudo /sbin/service --skip-redirect tgtd restart
        elif is_suse; then
            restart_service tgtd
        else
            # note for other distros: unstack.sh also uses the tgt/tgtd service
            # name, and would need to be adjusted too
            exit_distro_not_supported "restarting tgt"
        fi
    fi

    screen_it c-api "cd $CINDER_DIR && $CINDER_BIN_DIR/cinder-api --config-file $CINDER_CONF"
    screen_it c-vol "cd $CINDER_DIR && $CINDER_BIN_DIR/cinder-volume --config-file $CINDER_CONF"
    screen_it c-sch "cd $CINDER_DIR && $CINDER_BIN_DIR/cinder-scheduler --config-file $CINDER_CONF"
}

# stop_cinder() - Stop running processes
function stop_cinder() {
    # Kill the cinder screen windows
    for serv in c-api c-sch c-vol; do
        screen -S $SCREEN_NAME -p $serv -X kill
    done

    if is_service_enabled c-vol; then
        stop_service tgt
    fi
}

# Restore xtrace
$XTRACE