#!/bin/bash
#
# lib/cephadm
# Functions to control the configuration
# and operation of the **Ceph** storage service
# when deployed using the cephadm tool

# ``stack.sh`` calls the entry points in this order:
#
# - pre_install_ceph
# - install_ceph
# - configure_ceph
# - init_ceph
# - cleanup_ceph # unstack || clean

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

# GENERIC CEPHADM INTERNAL OPTIONS, DO NOT EDIT
CEPH_RELEASE=${CEPH_RELEASE:-pacific}
CEPH_PUB_KEY="/etc/ceph/ceph.pub"
CEPH_CONFIG="/etc/ceph/ceph.conf"
BOOTSTRAP_CONFIG="$HOME/bootstrap_ceph.conf"
CEPH_KEYRING="/etc/ceph/ceph.client.admin.keyring"
TARGET_BIN=/usr/bin
# TOGGLED IN THE CI TO SAVE RESOURCES
DISABLE_CEPHADM_POST_DEPLOY=${DISABLE_CEPHADM_POST_DEPLOY:-False}

# DEFAULT OPTIONS
ATTEMPTS=30
CONTAINER_IMAGE=${CONTAINER_IMAGE:-'quay.io/ceph/ceph:v16.2.9'}
DEVICES=()
FSID=$(uuidgen)
KEY_EXPORT_DIR="/etc/ceph"
KEYS=("client.openstack") # at least the client.openstack default key should be created
MIN_OSDS=1
SERVICES=()
SLEEP=5
CEPHADM_DEV_OSD=${CEPHADM_DEV_OSD:-"True"}
CEPH_LOOPBACK_DISK_SIZE=${CEPH_LOOPBACK_DISK_SIZE:-30G}
TARGET_DEV_OSD_DIR=${TARGET_DEV_OSD_DIR:-"/opt/stack"}

# POOLS
DEFAULT_PG_NUM=${DEFAULT_PG_NUM:-8}
DEFAULT_PGP_NUM=${DEFAULT_PGP_NUM:-8}

# RGW OPTIONS
RGW_PORT=8080

# CLIENT CONFIG
CEPH_CLIENT_CONFIG=$HOME/ceph_client.conf
CEPH_CONF_DIR=${CEPH_CONF_DIR:-/etc/ceph}
# The resulting client config pointed by the other clients
CEPH_CONF_FILE=${CEPH_CONF_FILE:-$CEPH_CONF_DIR/ceph.conf}

# LOG(s) and EXPORTED CONFIG FILES
EXPORT=$HOME/ceph_export.yml
RBD_CLIENT_LOG=/var/log/ceph/qemu-guest-\$pid.log

# MANILA DEFAULTS
MANILA_CEPH_USER=${MANILA_CEPH_USER:-manila}

# NFS OPTIONS
FSNAME=${FSNAME:-'cephfs'}
NFS_PORT=12345
CEPHFS_CLIENT=0
CEPHFS_CLIENT_NAME="client.$MANILA_CEPH_USER"
CEPHFS_CLIENT_LOG="/var/log/ceph-$CEPHFS_CLIENT_NAME.log"
CEPHFS_MULTIPLE_FILESYSTEMS=${CEPHFS_MULTIPLE_FILESYSTEMS:-False}


# GLANCE DEFAULTS
GLANCE_CEPH_USER=${GLANCE_CEPH_USER:-glance}
GLANCE_CEPH_POOL=${GLANCE_CEPH_POOL:-images}
GLANCE_RGW_BACKEND=${GLANCE_RGW_BACKEND:-False}

# Cinder DEFAULTS
CINDER_CEPH_POOL=${CINDER_CEPH_POOL:-volumes}
CINDER_CEPH_USER=${CINDER_CEPH_USER:-cinder}
CINDER_CEPH_UUID=${CINDER_CEPH_UUID:-$(uuidgen)}
# Enables new features such as Clone v2 API, which allows proper handling of
# deleting snapshots with child clone images.
CEPH_MIN_CLIENT_VERSION=${CEPH_MIN_CLIENT_VERSION:-mimic}

# Cinder Backup DEFAULTS
CINDER_BAK_CEPH_POOL=${CINDER_BAK_CEPH_POOL:-backups}
CINDER_BAK_CEPH_USER=${CINDER_BAK_CEPH_USER:-cinder-bak}

# Nova DEFAUTLS
NOVA_CEPH_POOL=${NOVA_CEPH_POOL:-vms}

[ -z "$SUDO" ] && SUDO=sudo

## Admin

# Admin: enable debug mode
function set_debug {
    if [ "$DEBUG" -eq 1 ]; then
        echo "[CEPHADM] Enabling Debug mode"
        $SUDO "$CEPHADM" shell --fsid $FSID --config $CEPH_CONFIG \
            --keyring $CEPH_KEYRING -- ceph config set mgr mgr/cephadm/log_to_cluster_level debug
        echo "[CEPHADM] See debug logs running: ceph -W cephadm --watch-debug"
    fi
}

# Admin: check ceph cluster status
function check_cluster_status {
    $SUDO "$CEPHADM" shell --fsid $FSID --config $CEPH_CONFIG \
        --keyring $CEPH_KEYRING -- ceph -s -f json-pretty
}

# Admin: export ceph cluster config spec
function export_spec {
    $SUDO "$CEPHADM" shell --fsid $FSID --config $CEPH_CONFIG \
        --keyring $CEPH_KEYRING -- ceph orch ls --export > "$EXPORT"
    echo "Ceph cluster config exported: $EXPORT"
}

# Pre-install ceph: install podman
function _install_podman {
    # FIXME(vkmc) Check required for Ubuntu 20.04 LTS (current CI node)
    # Remove when our CI is pushed to the next LTS version
    if ! command -v podman &> /dev/null; then
        if [[ $os_CODENAME =~ (focal) ]]; then
            echo "deb https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.04/ /" \
                | sudo tee /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list
            curl -L "https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/xUbuntu_20.04/Release.key" \
                | sudo apt-key add -
            sudo apt-get update
            sudo apt-get -y upgrade
        fi
        install_package podman
    fi
}

# Pre-install ceph: install required dependencies
function install_deps {
    install_package jq ceph-common
    _install_podman
    install_package python3-cephfs python3-prettytable python3-rados python3-rbd python3-requests
}

# Pre-install ceph: get cephadm binary
function get_cephadm {
    curl -O https://raw.githubusercontent.com/ceph/ceph/"$CEPH_RELEASE"/src/cephadm/cephadm
    $SUDO mv cephadm $TARGET_BIN
    $SUDO chmod +x $TARGET_BIN/cephadm
    echo "[GET CEPHADM] cephadm is now available"

    if [ -z "$CEPHADM" ]; then
        CEPHADM=${TARGET_BIN}/cephadm
    fi
}

# Pre-install ceph: bootstrap config
function bootstrap_config {
    cat <<EOF > "$BOOTSTRAP_CONFIG"
[global]
log to file = true
osd crush chooseleaf type = 0
osd_pool_default_pg_num = 8
osd_pool_default_pgp_num = 8
osd_pool_default_size = 1
[mon]
mon_warn_on_pool_no_redundancy = False
[osd]
osd_memory_target_autotune = true
osd_numa_auto_affinity = true
[mgr]
mgr/cephadm/autotune_memory_target_ratio = 0.2
EOF
}

## Install

# Install ceph: run cephadm bootstrap
function start_ceph {
    cluster=$(sudo cephadm ls | jq '.[]' | jq 'select(.name | test("^mon*")).fsid')
    if [ -z "$cluster" ]; then
    $SUDO $CEPHADM --image "$CONTAINER_IMAGE" \
            bootstrap \
            --fsid $FSID \
            --config "$BOOTSTRAP_CONFIG" \
            --output-config $CEPH_CONFIG \
            --output-keyring $CEPH_KEYRING \
            --output-pub-ssh-key $CEPH_PUB_KEY \
            --allow-overwrite \
            --allow-fqdn-hostname \
            --skip-monitoring-stack \
            --skip-dashboard \
            --single-host-defaults \
            --skip-firewalld \
            --skip-mon-network \
            --mon-ip "$HOST_IP"

    test -e $CEPH_CONFIG
    test -e $CEPH_KEYRING

    if [ "$CEPHADM_DEV_OSD" == 'True' ]; then
        create_osd_dev
    fi
    # Wait cephadm backend to be operational
    # and add osds via drivegroups
    sleep "$SLEEP"
    add_osds
    fi
}

# Install ceph: create a loopback device to be used as osd
function create_osd_dev {
    sudo dd if=/dev/zero of=$TARGET_DEV_OSD_DIR/ceph-osd.img bs=1 count=0 seek="$CEPH_LOOPBACK_DISK_SIZE"
    osd_dev=$(sudo losetup -f --show $TARGET_DEV_OSD_DIR/ceph-osd.img)
    sudo pvcreate $osd_dev
    sudo vgcreate ceph_vg $osd_dev
    sudo lvcreate -n ceph_lv_data -l +100%FREE ceph_vg
    DEVICES+=("/dev/ceph_vg/ceph_lv_data")
}

# cleanup ceph: delete the osd file and release the loopback device
function delete_osd_dev {
    if [ $(sudo lvs --noheadings -o lv_path -S lv_name=ceph_lv_data) ]; then
        sudo lvremove --force /dev/ceph_vg/ceph_lv_data
        sudo vgremove --force ceph_vg
        osd_dev=$(sudo losetup -j $TARGET_DEV_OSD_DIR/ceph-osd.img -l -n -O NAME)
        sudo pvremove --force $osd_dev
        sudo losetup -d $osd_dev
        sudo rm -f $TARGET_DEV_OSD_DIR/ceph-osd.img
        sudo partprobe
        DEVICES=()
    fi
}

# Install ceph: add osds
function add_osds {
    # let's add some osds
    if [ -z "$DEVICES" ]; then
        echo "Using ALL available devices"
        $SUDO $CEPHADM shell ceph orch apply osd --all-available-devices
    else
        for item in "${DEVICES[@]}"; do
            echo "Creating osd $item on node $HOSTNAME"
            $SUDO "$CEPHADM" shell --fsid $FSID --config $CEPH_CONFIG \
                --keyring $CEPH_KEYRING -- ceph orch daemon add osd "$HOSTNAME:$item"
        done
    fi

    while [ "$ATTEMPTS" -ne 0 ]; do
        num_osds=$($SUDO $CEPHADM shell --fsid $FSID --config $CEPH_CONFIG \
        --keyring $CEPH_KEYRING -- ceph -s -f json | jq '.osdmap | .num_up_osds')
        if [ "$num_osds" -ge "$MIN_OSDS" ]; then
            break;
        fi
        ATTEMPTS=$(("$ATTEMPTS" - 1))
        sleep 1
    done
    echo "[CEPHADM] OSD(s) deployed: $num_osds"

    # [ "$num_osds" -lt "$MIN_OSDS" ] && exit 255
}

# Install ceph: create and enable pools
function add_pools {

    [ "${#POOLS[@]}" -eq 0 ] && return;

    for pool in "${POOLS[@]}"; do
        $SUDO "$CEPHADM" shell --fsid $FSID --config $CEPH_CONFIG \
            --keyring $CEPH_KEYRING -- ceph osd pool create "$pool" "$DEFAULT_PG_NUM" \
            "$DEFAULT_PGP_NUM" replicated --autoscale-mode on

        # set the application to the pool (which also means rbd init the pool)
        $SUDO "$CEPHADM" shell --fsid $FSID --config $CEPH_CONFIG \
            --keyring $CEPH_KEYRING -- ceph osd pool application enable "$pool" rbd
    done
}

# Utility: build caps according to the generated pools
function build_caps {
    local CAPS=""
    for pool in "${POOLS[@]}"; do
        caps="allow rwx pool="$pool
        CAPS+=$caps,
    done
    echo "${CAPS::-1}"
}

# Install ceph: create a keyring
function _create_key {
    local name=$1
    local caps
    local osd_caps

    if [ "${#POOLS[@]}" -eq 0 ]; then
        osd_caps="allow *"
    else
        caps=$(build_caps)
        osd_caps="allow class-read object_prefix rbd_children, $caps"
    fi

    $SUDO "$CEPHADM" shell -v "$KEY_EXPORT_DIR:$KEY_EXPORT_DIR" --fsid $FSID --config $CEPH_CONFIG \
        --keyring $CEPH_KEYRING -- ceph auth get-or-create "$name" mgr "allow rw" mon "allow r" osd "$osd_caps" \
        -o "$KEY_EXPORT_DIR/ceph.$name.keyring"

    $SUDO chown ${STACK_USER}:$(id -g -n $whoami) \
        ${CEPH_CONF_DIR}/ceph.$name.keyring
}

# Install ceph: create one or more keyrings
function create_keys {
    for key_name in "${KEYS[@]}"; do
        echo "Creating key $key_name"
        _create_key "$key_name"
    done
}

# Install ceph: add MDS
function cephfs_config {
    # Two pools are generated by this action
    # - $FSNAME.FSNAME.data
    # - $FSNAME.FSNAME.meta
    # and the mds daemon is deployed
    $SUDO "$CEPHADM" shell --fsid $FSID --config $CEPH_CONFIG \
        --keyring $CEPH_KEYRING -- ceph fs volume create "$FSNAME"
}

# Install ceph: add NFS
function ceph_nfs_config {
    # (fpantano) TODO: Build an ingress daemon on top of this
    echo "[CEPHADM] Deploy nfs.$FSNAME backend"
    $SUDO "$CEPHADM" shell --fsid $FSID --config $CEPH_CONFIG \
        --keyring $CEPH_KEYRING -- ceph orch apply nfs \
        "$FSNAME" --placement="$HOSTNAME" --port $NFS_PORT
}

function _create_swift_endpoint {

    local swift_service
    swift_service=$(get_or_create_service "swift" "object-store" "Swift Service")

    local swift_endpoint
    swift_endpoint="$SWIFT_SERVICE_PROTOCOL://$SERVICE_HOST:${CEPH_RGW_PORT}/swift/v1"

    get_or_create_endpoint $swift_service \
        "$REGION_NAME" $swift_endpoint $swift_endpoint $swift_endpoint
}

# RGW pre config
function configure_ceph_embedded_rgw {

    # keystone endpoint for radosgw
    _create_swift_endpoint

    # Create radosgw service user with admin privileges
    create_service_user "radosgw" "admin"

    if [ "$CEPH_RGW_KEYSTONE_SSL" = "True" ]; then
        # radosgw needs to access keystone's revocation list
        sudo mkdir -p ${dest}/nss
        sudo openssl x509 -in /etc/keystone/ssl/certs/ca.pem -pubkey | \
            sudo certutil -d ${dest}/nss -A -n ca -t "TCu,Cu,Tuw"

        sudo openssl x509 -in /etc/keystone/ssl/certs/signing_cert.pem -pubkey | \
            sudo certutil -A -d ${dest}/nss -n signing_cert -t "P,P,P"
    fi
}

# General Ceph utility to set config options within the monitor's config database
function set_config_key {
    local section=$1
    local key=$2
    local value=$3
    $SUDO "$CEPHADM" shell --fsid $FSID --config $CEPH_CONFIG \
        ceph config set ${section} ${key} ${value}
}

# RGW config keys: no iniset anymore, everything is pushed as mgr key/value
function configure_rgw_ceph_section {

    # RGW KEYSTONE KEYS
    declare -A RGW_CONFIG_KEYS

    RGW_CONFIG_KEYS=(['rgw_keystone_api_version']=3
        ['rgw_keystone_url']="$KEYSTONE_SERVICE_URI"
        ['rgw_keystone_accepted_roles']="member, _member_, Member, admin"
        ['rgw_keystone_accepted_admin_roles']="ResellerAdmin"
        ['rgw_keystone_admin_domain']="$SERVICE_DOMAIN_NAME"
        ['rgw_keystone_admin_project']="$SERVICE_PROJECT_NAME"
        ['rgw_keystone_admin_user']="radosgw"
        ['rgw_s3_auth_use_keystone']="true"
        ['rgw_keystone_admin_password']="$SERVICE_PASSWORD"
        ['rgw_keystone_verify_ssl']="false"
        ['rgw_keystone_implicit_tenants']="true"
        ['rgw_swift_versioning_enabled']="true"
        ['rgw_swift_enforce_content_length']="true"
        ['rgw_swift_account_in_url']="true"
        ['rgw_trust_forwarded_https']="true"
        ['rgw_max_attr_name_len']=128
        ['rgw_max_attrs_num_in_req']=90
        ['rgw_max_attr_size']=256
    )

    for k in ${!RGW_CONFIG_KEYS[@]}; do
        set_config_key "global" ${k} ${RGW_CONFIG_KEYS[$k]}
    done
}

# Install ceph: add RGW
function rgw {
    configure_ceph_embedded_rgw

    $SUDO "$CEPHADM" shell --fsid $FSID --config $CEPH_CONFIG \
        --keyring $CEPH_KEYRING -- ceph orch apply rgw default default default default \
        "--placement=$HOSTNAME count:1" --port "$RGW_PORT"

    configure_rgw_ceph_section
}

# TODO: (fpantano) Remove this hack
function start_ceph_embedded_rgw {
    # noop
    :
}

# Configure cephfs and ceph_nfs
function configure_ceph_manila {
    # Deploy mds and configure cephfs
    cephfs_config
    # Deploy and configure ganesha
    [ $MANILA_CEPH_DRIVER == 'cephfsnfs' ] && ceph_nfs_config
    # Add manila keys to the list
    KEYS+=("client.$MANILA_CEPH_USER")
}

# Install ceph: services deployment
function enable_services {
    for item in "${SERVICES[@]}"; do
        case "$item" in
            cephfs|CEPHFS)
            echo "[CEPHADM] Config cephfs volume on node $HOSTNAME"
            cephfs_config
            CEPHFS_CLIENT=1
            ;;
            nfs|NFS)
            echo "[CEPHADM] Deploying NFS on node $HOSTNAME"
            ceph_nfs_config
            CEPHFS_CLIENT=1
            ;;
            rgw|RGW)
            echo "[CEPHADM] Deploying RGW on node $HOSTNAME"
            rgw
            ;;
        esac
    done
}

# Install ceph: client config
function client_config {
    echo "Dump the minimal ceph.conf"
    cp $CEPH_CONFIG "$CEPH_CLIENT_CONFIG"

    cat >> "$CEPH_CLIENT_CONFIG" <<-EOF
[client.libvirt]
admin socket = /var/run/ceph/\$cluster-\$type.\$id.\$pid.\$cctid.asok
log file = $RBD_CLIENT_LOG
EOF

    if [ "$CEPHFS_CLIENT" -eq 1 ]; then
        cat >> "$CEPH_CLIENT_CONFIG" <<-EOF
[$CEPHFS_CLIENT_NAME]
client mount uid = 0
client mount gid = 0
log file = $CEPHFS_CLIENT_LOG
admin socket = /var/run/ceph/\$cluster-\$type.\$id.\$pid.\$cctid.asok
keyring = $KEY_EXPORT_DIR/ceph.$CEPHFS_CLIENT_NAME.keyring
EOF
        echo "Client config exported: $CEPH_CLIENT_CONFIG"
    fi

    # Nova resolves the keyring using the pattern $cluster.conf
    # For this reason we need to override the content of the
    # generated (minimal) ceph.conf with the client part.
    $SUDO cp $CEPH_CLIENT_CONFIG $CEPH_CONF_FILE
}

## Remove ceph

# Remove ceph: remove cluster and zap osds
function stop_ceph {
    local cluster_deleted
    local timeout

    if ! [ -x "$CEPHADM" ]; then
        get_cephadm
        CEPHADM=${TARGET_BIN}/cephadm
    fi

    cluster_deleted=0
    timeout=3
    while : ; do
        CLUSTER_FSID=$(sudo cephadm ls | jq '.[]' | jq 'select(.name | test("^mon*")).fsid' | tr -d \")
        if [[ -n "$CLUSTER_FSID" ]]; then
            sudo cephadm rm-cluster --zap-osds --fsid $CLUSTER_FSID --force
        else
            cluster_deleted=1
            echo "[CEPHADM] Cluster deleted"
        fi
        $(( timeout-- ))

        [[ "$cluster_deleted" -eq 0 && "$timeout" -eq 0 ]] && \
            echo "[CEPHADM] Error deleting the cluster" && exit 255
        [[ "$cluster_deleted" -eq 1 || "$timeout" -eq 0 ]] && break
    done
}

## devstack-plugin-ceph functions

function pre_install_ceph {
    # Check dependencies for the service.
    install_deps
}

function install_ceph {
    # Install the service.
    bootstrap_config
    get_cephadm
    start_ceph
}

function config_glance {
    if [[ "$GLANCE_RGW_BACKEND" = "True" && "$ENABLE_CEPH_RGW" = "True" ]]; then
        # common glance accounts for swift
        create_service_user "glance-swift" "ResellerAdmin"
        iniset $GLANCE_SWIFT_STORE_CONF ref1 user $SERVICE_PROJECT_NAME:glance-swift

        AUTH_URL=$KEYSTONE_SERVICE_URI/v$CEPH_RGW_IDENTITY_API_VERSION

        iniset $GLANCE_SWIFT_STORE_CONF ref1 key $SERVICE_PASSWORD
        iniset $GLANCE_SWIFT_STORE_CONF ref1 auth_address $AUTH_URL
        iniset $GLANCE_SWIFT_STORE_CONF ref1 user_domain_name $SERVICE_DOMAIN_NAME
        iniset $GLANCE_SWIFT_STORE_CONF ref1 project_domain_name $SERVICE_DOMAIN_NAME
        iniset $GLANCE_SWIFT_STORE_CONF ref1 auth_version $CEPH_RGW_IDENTITY_API_VERSION
        if [[ "$GLANCE_ENABLE_MULTIPLE_STORES" == "True" ]]; then
            # NOTE(abhishekk): As this is all in one setup there will be only
            # one swift instance available even if glance multiple store is enabled.
            # We are assuming the store name as `swift_store`.
            iniset $GLANCE_API_CONF glance_store default_backend "swift_store"
            iniset $GLANCE_API_CONF "swift_store" swift_store_create_container_on_put True
            iniset $GLANCE_API_CONF "swift_store" swift_store_config_file $GLANCE_SWIFT_STORE_CONF
            iniset $GLANCE_API_CONF "swift_store" default_swift_reference ref1
        else
            iniset $GLANCE_API_CONF glance_store default_store swift
            iniset $GLANCE_API_CONF glance_store swift_store_create_container_on_put True
            iniset $GLANCE_API_CONF glance_store swift_store_config_file $GLANCE_SWIFT_STORE_CONF
            iniset $GLANCE_API_CONF glance_store default_swift_reference ref1
            iniset $GLANCE_API_CONF glance_store stores "file, http, swift"
        fi
    else
        iniset $GLANCE_API_CONF DEFAULT show_multiple_locations True
        if [[ "$GLANCE_ENABLE_MULTIPLE_STORES" == "True" ]]; then
            # NOTE(abhishekk): As this is all in one setup there will be only
            # one rbd instance available even if glance multiple store is enabled.
            # We are assuming the store name as `robust_rbd`. Also we will set another
            # file store 'fast' along with it as old setup also used to configure file
            # store when rbd is enabled.
            iniset $GLANCE_API_CONF DEFAULT enabled_backends "robust_rbd:rbd,fast:file"
            iniset $GLANCE_API_CONF glance_store default_backend robust_rbd
            iniset $GLANCE_API_CONF "robust_rbd" rbd_store_ceph_conf $CEPH_CONF_FILE
            iniset $GLANCE_API_CONF "robust_rbd" rbd_store_user $GLANCE_CEPH_USER
            iniset $GLANCE_API_CONF "robust_rbd" rbd_store_pool $GLANCE_CEPH_POOL
        else
            iniset $GLANCE_API_CONF glance_store default_store rbd
            iniset $GLANCE_API_CONF glance_store stores "file, http, rbd"
            iniset $GLANCE_API_CONF glance_store rbd_store_ceph_conf $CEPH_CONF_FILE
            iniset $GLANCE_API_CONF glance_store rbd_store_user $GLANCE_CEPH_USER
            iniset $GLANCE_API_CONF glance_store rbd_store_pool $GLANCE_CEPH_POOL
        fi
    fi
}

function config_nova {
    iniset $NOVA_CONF libvirt rbd_user ${CINDER_CEPH_USER}
    iniset $NOVA_CONF libvirt rbd_secret_uuid ${CINDER_CEPH_UUID}
    iniset $NOVA_CONF libvirt inject_key false
    iniset $NOVA_CONF libvirt inject_partition -2
    iniset $NOVA_CONF libvirt disk_cachemodes "network=writeback"
    iniset $NOVA_CONF libvirt images_type rbd
    iniset $NOVA_CONF libvirt images_rbd_pool ${NOVA_CEPH_POOL}
    iniset $NOVA_CONF libvirt images_rbd_ceph_conf ${CEPH_CONF_FILE}
}

function set_min_client_version {
    if [ ! -z "$CEPH_MIN_CLIENT_VERSION" ]; then
        $SUDO "$CEPHADM" shell --fsid $FSID --config $CEPH_CONFIG \
            --keyring $CEPH_KEYRING -- ceph osd set-require-min-compat-client ${CEPH_MIN_CLIENT_VERSION}
    fi
}

# import_libvirt_secret_ceph() - Imports Cinder user key into libvirt
# so it can connect to the Ceph cluster while attaching a Cinder block device
function import_libvirt_secret_ceph {

    [ "$ENABLE_CEPH_NOVA" == "False" ] && return;

    NOVA_VIRSH_SECRET=$($SUDO cat ${CEPH_CONF_DIR}/ceph.client.${CINDER_CEPH_USER}.keyring | awk '/key/ {print $3}')
    cat <<EOF | sudo tee secret.xml>/dev/null
    <secret ephemeral='no' private='no'>
    <uuid>${CINDER_CEPH_UUID}</uuid>
    <usage type='ceph'>
        <name>client.${CINDER_CEPH_USER} secret</name>
    </usage>
    </secret>
EOF
    $SUDO virsh secret-define --file secret.xml # 2>/dev/null
    $SUDO virsh secret-set-value --secret ${CINDER_CEPH_UUID} \
        --base64 ${NOVA_VIRSH_SECRET} # 2>/dev/null

    $SUDO rm -f secret.xml
}

# _undefine_virsh_secret() - Undefine Cinder key secret from libvirt
function _undefine_virsh_secret {
    local virsh_uuid
    virsh_uuid=$($SUDO virsh secret-list | awk '/^ ?[0-9a-z]/ { print $1 }')
    echo $virsh_uuid
    $SUDO virsh secret-undefine ${virsh_uuid} &>/dev/null
}

function configure_ceph {

    if is_ceph_enabled_for_service manila; then
        SERVICES+=('cephfs')
        KEYS+=("client.$MANILA_CEPH_USER")
    fi

    [ "$MANILA_CEPH_DRIVER" == "cephfsnfs" ] && SERVICES+=('nfs')

    if is_ceph_enabled_for_service glance; then
        POOLS+=($GLANCE_CEPH_POOL)
        KEYS+=("client.$GLANCE_CEPH_USER")
        config_glance
    fi

    if is_ceph_enabled_for_service cinder; then
        POOLS+=($CINDER_CEPH_POOL)
        KEYS+=("client.$CINDER_CEPH_USER")
        set_min_client_version
    fi

    if is_ceph_enabled_for_service c-bak; then
        POOLS+=($CINDER_BAK_CEPH_POOL)
        KEYS+=("client.$CINDER_BAK_CEPH_USER")
    fi

    if is_ceph_enabled_for_service nova; then
        POOLS+=($NOVA_CEPH_POOL)
        KEYS+=("client.$CINDER_CEPH_USER")
        config_nova
    fi

    [ "$ENABLE_CEPH_RGW" == "True" ] && SERVICES+=('rgw')

    enable_services
    add_pools
    create_keys
    client_config
    import_libvirt_secret_ceph

    if [[ "$DISABLE_CEPHADM_POST_DEPLOY" == "True" ]]; then
        disable_cephadm
    fi
}

# Hack: remove this function at some point
function configure_ceph_manila {
    # noop
    :
}

function cleanup_ceph {
    # Cleanup the service.
    stop_ceph
    delete_osd_dev
    # purge ceph config file and keys
    $SUDO rm -f ${CEPH_CONF_DIR}/*
    if is_ceph_enabled_for_service nova; then
    _undefine_virsh_secret
    fi
}

function disable_cephadm {
    $SUDO "$CEPHADM" shell --fsid $FSID --config $CEPH_CONFIG \
        --keyring $CEPH_KEYRING -- ceph orch set backend

    $SUDO "$CEPHADM" shell --fsid $FSID --config $CEPH_CONFIG \
        --keyring $CEPH_KEYRING -- ceph mgr module disable cephadm
}

# is_ceph_enabled_for_service() - checks whether the OpenStack service
# specified as an argument is enabled with Ceph as its storage backend.
function is_ceph_enabled_for_service {
    local config config_name enabled service
    enabled=1
    service=$1
    # Construct the global variable ENABLE_CEPH_.* corresponding to a
    # $service.
    config_name=ENABLE_CEPH_$(echo $service | \
        tr '[:lower:]' '[:upper:]' | tr '-' '_')
    config=$(eval echo "\$$config_name")

    if (is_service_enabled $service) && [[ $config == 'True' ]]; then
        enabled=0
    fi
    return $enabled
}

# Restore xtrace
$XTRACE

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## mode: shell-script
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