lib/swift

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

# Dependencies:
#
# - ``functions`` file
# - ``apache`` file
# - ``DEST``, ``SCREEN_NAME``, `SWIFT_HASH` must be defined
# - ``STACK_USER`` must be defined
# - ``SWIFT_DATA_DIR`` or ``DATA_DIR`` must be defined
# - ``lib/keystone`` file
#
# ``stack.sh`` calls the entry points in this order:
#
# - install_swift
# - _config_swift_apache_wsgi
# - configure_swift
# - init_swift
# - start_swift
# - stop_swift
# - cleanup_swift
# - _cleanup_swift_apache_wsgi

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


# Defaults
# --------

if is_service_enabled tls-proxy; then
    SWIFT_SERVICE_PROTOCOL="https"
fi

# Set up default directories
GITDIR["python-swiftclient"]=$DEST/python-swiftclient

# Swift virtual environment
if [[ ${USE_VENV} = True ]]; then
    PROJECT_VENV["swift"]=${SWIFT_DIR}.venv
    SWIFT_BIN_DIR=${PROJECT_VENV["swift"]}/bin
else
    SWIFT_BIN_DIR=$(get_python_exec_prefix)
fi


SWIFT_DIR=$DEST/swift
SWIFT_AUTH_CACHE_DIR=${SWIFT_AUTH_CACHE_DIR:-/var/cache/swift}
SWIFT_APACHE_WSGI_DIR=${SWIFT_APACHE_WSGI_DIR:-/var/www/swift}
SWIFT3_DIR=$DEST/swift3

SWIFT_SERVICE_PROTOCOL=${SWIFT_SERVICE_PROTOCOL:-$SERVICE_PROTOCOL}
SWIFT_DEFAULT_BIND_PORT=${SWIFT_DEFAULT_BIND_PORT:-8080}
SWIFT_DEFAULT_BIND_PORT_INT=${SWIFT_DEFAULT_BIND_PORT_INT:-8081}
SWIFT_SERVICE_LOCAL_HOST=${SWIFT_SERVICE_LOCAL_HOST:-$SERVICE_LOCAL_HOST}
SWIFT_SERVICE_LISTEN_ADDRESS=${SWIFT_SERVICE_LISTEN_ADDRESS:-$SERVICE_LISTEN_ADDRESS}

# TODO: add logging to different location.

# Set ``SWIFT_DATA_DIR`` to the location of swift drives and objects.
# Default is the common DevStack data directory.
SWIFT_DATA_DIR=${SWIFT_DATA_DIR:-${DATA_DIR}/swift}
SWIFT_DISK_IMAGE=${SWIFT_DATA_DIR}/drives/images/swift.img

# Set ``SWIFT_CONF_DIR`` to the location of the configuration files.
# Default is ``/etc/swift``.
SWIFT_CONF_DIR=${SWIFT_CONF_DIR:-/etc/swift}

if is_service_enabled s-proxy && is_service_enabled swift3; then
    # If we are using ``swift3``, we can default the S3 port to swift instead
    # of nova-objectstore
    S3_SERVICE_PORT=${S3_SERVICE_PORT:-$SWIFT_DEFAULT_BIND_PORT}
fi

if is_service_enabled g-api; then
    # Minimum Cinder volume size is 1G so if Swift backend for Glance is
    # only 1G we can not upload volume to image.
    # Increase Swift disk size up to 2G
    SWIFT_LOOPBACK_DISK_SIZE_DEFAULT=2G
    SWIFT_MAX_FILE_SIZE_DEFAULT=1073741824 # 1G
else
    # DevStack will create a loop-back disk formatted as XFS to store the
    # swift data. Set ``SWIFT_LOOPBACK_DISK_SIZE`` to the disk size in
    # kilobytes.
    # Default is 1 gigabyte.
    SWIFT_LOOPBACK_DISK_SIZE_DEFAULT=1G
    SWIFT_MAX_FILE_SIZE_DEFAULT=536870912 # 512M
fi

# if tempest enabled the default size is 6 Gigabyte.
if is_service_enabled tempest; then
    SWIFT_LOOPBACK_DISK_SIZE_DEFAULT=${SWIFT_LOOPBACK_DISK_SIZE:-6G}
    SWIFT_MAX_FILE_SIZE_DEFAULT=5368709122 # Swift default 5G
fi

SWIFT_LOOPBACK_DISK_SIZE=${SWIFT_LOOPBACK_DISK_SIZE:-$SWIFT_LOOPBACK_DISK_SIZE_DEFAULT}

# Set ``SWIFT_EXTRAS_MIDDLEWARE`` to extras middlewares.
# Default is ``staticweb, formpost``
SWIFT_EXTRAS_MIDDLEWARE=${SWIFT_EXTRAS_MIDDLEWARE:-formpost staticweb}

# Set ``SWIFT_EXTRAS_MIDDLEWARE_LAST`` to extras middlewares that need to be at
# the end of the pipeline.
SWIFT_EXTRAS_MIDDLEWARE_LAST=${SWIFT_EXTRAS_MIDDLEWARE_LAST:-}

# Set ``SWIFT_EXTRAS_MIDDLEWARE_NO_AUTH`` to extras middlewares that need to be at
# the beginning of the pipeline, before authentication middlewares.
SWIFT_EXTRAS_MIDDLEWARE_NO_AUTH=${SWIFT_EXTRAS_MIDDLEWARE_NO_AUTH:-crossdomain}

# The ring uses a configurable number of bits from a path's MD5 hash as
# a partition index that designates a device. The number of bits kept
# from the hash is known as the partition power, and 2 to the partition
# power indicates the partition count. Partitioning the full MD5 hash
# ring allows other parts of the cluster to work in batches of items at
# once which ends up either more efficient or at least less complex than
# working with each item separately or the entire cluster all at once.
# By default we define 9 for the partition count (which mean 512).
SWIFT_PARTITION_POWER_SIZE=${SWIFT_PARTITION_POWER_SIZE:-9}

# Set ``SWIFT_REPLICAS`` to configure how many replicas are to be
# configured for your Swift cluster. By default we are configuring
# only one replica since this is way less CPU and memory intensive. If
# you are planning to test swift replication you may want to set this
# up to 3.
SWIFT_REPLICAS=${SWIFT_REPLICAS:-1}
SWIFT_REPLICAS_SEQ=$(seq ${SWIFT_REPLICAS})

# Set ``SWIFT_START_ALL_SERVICES`` to control whether all Swift
# services (including the *-auditor, *-replicator, *-reconstructor, etc.
# daemons) should be started.
SWIFT_START_ALL_SERVICES=$(trueorfalse True SWIFT_START_ALL_SERVICES)

# Set ``SWIFT_LOG_TOKEN_LENGTH`` to configure how many characters of an auth
# token should be placed in the logs. When keystone is used with PKI tokens,
# the token values can be huge, seemingly larger the 2K, at the least. We
# restrict it here to a default of 12 characters, which should be enough to
# trace through the logs when looking for its use.
SWIFT_LOG_TOKEN_LENGTH=${SWIFT_LOG_TOKEN_LENGTH:-12}

# Set ``SWIFT_MAX_HEADER_SIZE`` to configure the maximum length of headers in
# Swift API
SWIFT_MAX_HEADER_SIZE=${SWIFT_MAX_HEADER_SIZE:-16384}

# Set ``SWIFT_MAX_FILE_SIZE`` to configure the maximum file size in Swift API
# Default 500MB because the loopback file used for swift could be 1 or 2 GB
SWIFT_MAX_FILE_SIZE=${SWIFT_MAX_FILE_SIZE:-$SWIFT_MAX_FILE_SIZE_DEFAULT}

# Set ``OBJECT_PORT_BASE``, ``CONTAINER_PORT_BASE``, ``ACCOUNT_PORT_BASE``
# Port bases used in port number calculation for the service "nodes"
# The specified port number will be used, the additional ports calculated by
# base_port + node_num * 10
OBJECT_PORT_BASE=${OBJECT_PORT_BASE:-6613}
CONTAINER_PORT_BASE=${CONTAINER_PORT_BASE:-6611}
ACCOUNT_PORT_BASE=${ACCOUNT_PORT_BASE:-6612}

# Enable tempurl feature
SWIFT_ENABLE_TEMPURLS=${SWIFT_ENABLE_TEMPURLS:-False}
SWIFT_TEMPURL_KEY=${SWIFT_TEMPURL_KEY:-}

# Toggle for deploying Swift under HTTPD + mod_wsgi
SWIFT_USE_MOD_WSGI=${SWIFT_USE_MOD_WSGI:-False}

# A space-separated list of storage node IPs that
# should be used to create the Swift rings
SWIFT_STORAGE_IPS=${SWIFT_STORAGE_IPS:-}


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

# Test if any Swift services are enabled
# is_swift_enabled
function is_swift_enabled {
    [[ ,${ENABLED_SERVICES} =~ ,"s-" ]] && return 0
    return 1
}

# cleanup_swift() - Remove residual data files
function cleanup_swift {
    rm -f ${SWIFT_CONF_DIR}{*.builder,*.ring.gz,backups/*.builder,backups/*.ring.gz}
    if egrep -q ${SWIFT_DATA_DIR}/drives/sdb1 /proc/mounts; then
        sudo umount ${SWIFT_DATA_DIR}/drives/sdb1
    fi
    if [[ -e ${SWIFT_DISK_IMAGE} ]]; then
        rm ${SWIFT_DISK_IMAGE}
    fi
    rm -rf ${SWIFT_DATA_DIR}/run/
    if [ "$SWIFT_USE_MOD_WSGI" == "True" ]; then
        _cleanup_swift_apache_wsgi
    fi
}

# _cleanup_swift_apache_wsgi() - Remove wsgi files, disable and remove apache vhost file
function _cleanup_swift_apache_wsgi {
    sudo rm -f $SWIFT_APACHE_WSGI_DIR/*.wsgi
    disable_apache_site proxy-server
    local node_number type
    for node_number in ${SWIFT_REPLICAS_SEQ}; do
        for type in object container account; do
            local site_name=${type}-server-${node_number}
            disable_apache_site ${site_name}
            sudo rm -f $(apache_site_config_for ${site_name})
        done
    done
}

# _config_swift_apache_wsgi() - Set WSGI config files of Swift
function _config_swift_apache_wsgi {
    sudo mkdir -p ${SWIFT_APACHE_WSGI_DIR}
    local proxy_port=${SWIFT_DEFAULT_BIND_PORT}

    # copy proxy vhost and wsgi file
    sudo cp ${SWIFT_DIR}/examples/apache2/proxy-server.template $(apache_site_config_for proxy-server)
    sudo sed -e "
        /^#/d;/^$/d;
        s/%PORT%/$proxy_port/g;
        s/%SERVICENAME%/proxy-server/g;
        s/%APACHE_NAME%/${APACHE_NAME}/g;
        s/%USER%/${STACK_USER}/g;
    " -i $(apache_site_config_for proxy-server)
    enable_apache_site proxy-server

    sudo cp ${SWIFT_DIR}/examples/wsgi/proxy-server.wsgi.template ${SWIFT_APACHE_WSGI_DIR}/proxy-server.wsgi
    sudo sed -e "
        /^#/d;/^$/d;
        s/%SERVICECONF%/proxy-server.conf/g;
    " -i ${SWIFT_APACHE_WSGI_DIR}/proxy-server.wsgi

    # copy apache vhost file and set name and port
    local node_number
    for node_number in ${SWIFT_REPLICAS_SEQ}; do
        local object_port
        object_port=$(( OBJECT_PORT_BASE + 10 * (node_number - 1) ))
        local container_port
        container_port=$(( CONTAINER_PORT_BASE + 10 * (node_number - 1) ))
        local account_port
        account_port=$(( ACCOUNT_PORT_BASE + 10 * (node_number - 1) ))

        sudo cp ${SWIFT_DIR}/examples/apache2/object-server.template $(apache_site_config_for object-server-${node_number})
        sudo sed -e "
            s/%PORT%/$object_port/g;
            s/%SERVICENAME%/object-server-${node_number}/g;
            s/%APACHE_NAME%/${APACHE_NAME}/g;
            s/%USER%/${STACK_USER}/g;
        " -i $(apache_site_config_for object-server-${node_number})
        enable_apache_site object-server-${node_number}

        sudo cp ${SWIFT_DIR}/examples/wsgi/object-server.wsgi.template ${SWIFT_APACHE_WSGI_DIR}/object-server-${node_number}.wsgi
        sudo sed -e "
            /^#/d;/^$/d;
            s/%SERVICECONF%/object-server\/${node_number}.conf/g;
        " -i ${SWIFT_APACHE_WSGI_DIR}/object-server-${node_number}.wsgi

        sudo cp ${SWIFT_DIR}/examples/apache2/container-server.template $(apache_site_config_for container-server-${node_number})
        sudo sed -e "
            /^#/d;/^$/d;
            s/%PORT%/$container_port/g;
            s/%SERVICENAME%/container-server-${node_number}/g;
            s/%APACHE_NAME%/${APACHE_NAME}/g;
            s/%USER%/${STACK_USER}/g;
        " -i $(apache_site_config_for container-server-${node_number})
        enable_apache_site container-server-${node_number}

        sudo cp ${SWIFT_DIR}/examples/wsgi/container-server.wsgi.template ${SWIFT_APACHE_WSGI_DIR}/container-server-${node_number}.wsgi
        sudo sed -e "
            /^#/d;/^$/d;
            s/%SERVICECONF%/container-server\/${node_number}.conf/g;
        " -i ${SWIFT_APACHE_WSGI_DIR}/container-server-${node_number}.wsgi

        sudo cp ${SWIFT_DIR}/examples/apache2/account-server.template $(apache_site_config_for account-server-${node_number})
        sudo sed -e "
            /^#/d;/^$/d;
            s/%PORT%/$account_port/g;
            s/%SERVICENAME%/account-server-${node_number}/g;
            s/%APACHE_NAME%/${APACHE_NAME}/g;
            s/%USER%/${STACK_USER}/g;
        " -i $(apache_site_config_for account-server-${node_number})
        enable_apache_site account-server-${node_number}

        sudo cp ${SWIFT_DIR}/examples/wsgi/account-server.wsgi.template ${SWIFT_APACHE_WSGI_DIR}/account-server-${node_number}.wsgi
        sudo sed -e "
            /^#/d;/^$/d;
            s/%SERVICECONF%/account-server\/${node_number}.conf/g;
        " -i ${SWIFT_APACHE_WSGI_DIR}/account-server-${node_number}.wsgi
    done
}

# This function generates an object/container/account configuration
# emulating 4 nodes on different ports
function generate_swift_config_services {
    local swift_node_config=$1
    local node_id=$2
    local bind_port=$3
    local server_type=$4

    log_facility=$(( node_id - 1 ))
    local node_path=${SWIFT_DATA_DIR}/${node_number}

    iniuncomment ${swift_node_config} DEFAULT user
    iniset ${swift_node_config} DEFAULT user ${STACK_USER}

    iniuncomment ${swift_node_config} DEFAULT bind_port
    iniset ${swift_node_config} DEFAULT bind_port ${bind_port}

    iniuncomment ${swift_node_config} DEFAULT swift_dir
    iniset ${swift_node_config} DEFAULT swift_dir ${SWIFT_CONF_DIR}

    iniuncomment ${swift_node_config} DEFAULT devices
    iniset ${swift_node_config} DEFAULT devices ${node_path}

    iniuncomment ${swift_node_config} DEFAULT log_facility
    iniset ${swift_node_config} DEFAULT log_facility LOG_LOCAL${log_facility}

    iniuncomment ${swift_node_config} DEFAULT workers
    iniset ${swift_node_config} DEFAULT workers ${API_WORKERS:-1}

    iniuncomment ${swift_node_config} DEFAULT disable_fallocate
    iniset ${swift_node_config} DEFAULT disable_fallocate true

    iniuncomment ${swift_node_config} DEFAULT mount_check
    iniset ${swift_node_config} DEFAULT mount_check false

    iniuncomment ${swift_node_config} ${server_type}-replicator vm_test_mode
    iniset ${swift_node_config} ${server_type}-replicator vm_test_mode yes

    # Using a sed and not iniset/iniuncomment because we want to a global
    # modification and make sure it works for new sections.
    sed -i -e "s,#[ ]*recon_cache_path .*,recon_cache_path = ${SWIFT_DATA_DIR}/cache," ${swift_node_config}
}

# configure_swift() - Set config files, create data dirs and loop image
function configure_swift {
    local swift_pipeline="${SWIFT_EXTRAS_MIDDLEWARE_NO_AUTH}"
    local node_number
    local swift_node_config
    local swift_log_dir
    local user_group

    # Make sure to kill all swift processes first
    swift-init --run-dir=${SWIFT_DATA_DIR}/run all stop || true

    sudo install -d -o ${STACK_USER} ${SWIFT_CONF_DIR}
    sudo install -d -o ${STACK_USER} ${SWIFT_CONF_DIR}/{object,container,account}-server

    if [[ "$SWIFT_CONF_DIR" != "/etc/swift" ]]; then
        # Some swift tools are hard-coded to use ``/etc/swift`` and are apparently not going to be fixed.
        # Create a symlink if the config dir is moved
        sudo ln -sf ${SWIFT_CONF_DIR} /etc/swift
    fi

    # Swift use rsync to synchronize between all the different
    # partitions (which make more sense when you have a multi-node
    # setup) we configure it with our version of rsync.
    sed -e "
        s/%GROUP%/${USER_GROUP}/;
        s/%USER%/${STACK_USER}/;
        s,%SWIFT_DATA_DIR%,$SWIFT_DATA_DIR,;
    " $FILES/swift/rsyncd.conf | sudo tee /etc/rsyncd.conf
    # rsyncd.conf just prepared for 4 nodes
    if is_ubuntu; then
        sudo sed -i '/^RSYNC_ENABLE=false/ { s/false/true/ }' /etc/default/rsync
    elif [ -e /etc/xinetd.d/rsync ]; then
        sudo sed -i '/disable *= *yes/ { s/yes/no/ }' /etc/xinetd.d/rsync
    fi

    SWIFT_CONFIG_PROXY_SERVER=${SWIFT_CONF_DIR}/proxy-server.conf
    cp ${SWIFT_DIR}/etc/proxy-server.conf-sample ${SWIFT_CONFIG_PROXY_SERVER}

    # To run container sync feature introduced in Swift ver 1.12.0,
    # container sync "realm" is added in container-sync-realms.conf
    local csyncfile=${SWIFT_CONF_DIR}/container-sync-realms.conf
    cp ${SWIFT_DIR}/etc/container-sync-realms.conf-sample ${csyncfile}
    iniset ${csyncfile} realm1 key realm1key
    iniset ${csyncfile} realm1 cluster_name1 "$SWIFT_SERVICE_PROTOCOL://$SERVICE_HOST:$SWIFT_DEFAULT_BIND_PORT/v1/"

    iniuncomment ${SWIFT_CONFIG_PROXY_SERVER} DEFAULT user
    iniset ${SWIFT_CONFIG_PROXY_SERVER} DEFAULT user ${STACK_USER}

    iniuncomment ${SWIFT_CONFIG_PROXY_SERVER} DEFAULT swift_dir
    iniset ${SWIFT_CONFIG_PROXY_SERVER} DEFAULT swift_dir ${SWIFT_CONF_DIR}

    iniuncomment ${SWIFT_CONFIG_PROXY_SERVER} DEFAULT workers
    iniset ${SWIFT_CONFIG_PROXY_SERVER} DEFAULT workers 1

    iniuncomment ${SWIFT_CONFIG_PROXY_SERVER} DEFAULT log_level
    iniset ${SWIFT_CONFIG_PROXY_SERVER} DEFAULT log_level DEBUG

    iniuncomment ${SWIFT_CONFIG_PROXY_SERVER} DEFAULT bind_ip
    iniset ${SWIFT_CONFIG_PROXY_SERVER} DEFAULT bind_ip ${SWIFT_SERVICE_LISTEN_ADDRESS}

    iniuncomment ${SWIFT_CONFIG_PROXY_SERVER} DEFAULT bind_port
    if is_service_enabled tls-proxy; then
        iniset ${SWIFT_CONFIG_PROXY_SERVER} DEFAULT bind_port ${SWIFT_DEFAULT_BIND_PORT_INT}
    else
        iniset ${SWIFT_CONFIG_PROXY_SERVER} DEFAULT bind_port ${SWIFT_DEFAULT_BIND_PORT}
    fi

    # DevStack is commonly run in a small slow environment, so bump the timeouts up.
    # ``node_timeout`` is the node read operation response time to the proxy server
    # ``conn_timeout`` is how long it takes a connect() system call to return
    iniset ${SWIFT_CONFIG_PROXY_SERVER} app:proxy-server node_timeout 120
    iniset ${SWIFT_CONFIG_PROXY_SERVER} app:proxy-server conn_timeout 20

    # Versioned Writes
    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:versioned_writes allow_versioned_writes true

    # Configure Ceilometer
    if is_service_enabled ceilometer; then
        iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:ceilometer "set log_level" "WARN"
        iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:ceilometer paste.filter_factory "ceilometermiddleware.swift:filter_factory"
        iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:ceilometer control_exchange "swift"
        iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:ceilometer url $(get_notification_url)
        iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:ceilometer driver "messaging"
        iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:ceilometer topic "notifications"
        SWIFT_EXTRAS_MIDDLEWARE_LAST="${SWIFT_EXTRAS_MIDDLEWARE_LAST} ceilometer"
    fi

    # Restrict the length of auth tokens in the Swift ``proxy-server`` logs.
    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:proxy-logging reveal_sensitive_prefix ${SWIFT_LOG_TOKEN_LENGTH}

    # By default Swift will be installed with Keystone and tempauth middleware
    # and add the swift3 middleware if its configured for it. The token for
    # tempauth would be prefixed with the reseller_prefix setting `TEMPAUTH_` the
    # token for keystoneauth would have the standard reseller_prefix `AUTH_`
    if is_service_enabled swift3;then
        swift_pipeline+=" swift3 s3token "
    fi

    if is_service_enabled keystone; then
        swift_pipeline+=" authtoken keystoneauth"
    fi
    swift_pipeline+=" tempauth "

    sed -i "/^pipeline/ { s/tempauth/${swift_pipeline} ${SWIFT_EXTRAS_MIDDLEWARE}/ ;}" ${SWIFT_CONFIG_PROXY_SERVER}
    sed -i "/^pipeline/ { s/proxy-server/${SWIFT_EXTRAS_MIDDLEWARE_LAST} proxy-server/ ; }" ${SWIFT_CONFIG_PROXY_SERVER}

    iniset ${SWIFT_CONFIG_PROXY_SERVER} app:proxy-server account_autocreate true
    iniset ${SWIFT_CONFIG_PROXY_SERVER} app:proxy-server allow_account_management true

    # Configure Crossdomain
    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:crossdomain use "egg:swift#crossdomain"

    # Configure authtoken middleware to use the same Python logging
    # adapter provided by the Swift ``proxy-server``, so that request transaction
    # IDs will included in all of its log messages.
    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:authtoken log_name swift

    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:authtoken paste.filter_factory keystonemiddleware.auth_token:filter_factory
    configure_auth_token_middleware $SWIFT_CONFIG_PROXY_SERVER swift $SWIFT_AUTH_CACHE_DIR filter:authtoken
    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:authtoken delay_auth_decision 1
    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:authtoken cache swift.cache
    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:authtoken include_service_catalog False

    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:keystoneauth use "egg:swift#keystoneauth"
    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:keystoneauth operator_roles "Member, admin"

    # Configure Tempauth. In the sample config file Keystoneauth is commented
    # out. Make sure we uncomment Tempauth after we uncomment Keystoneauth
    # otherwise, this code also sets the reseller_prefix for Keystoneauth.
    iniuncomment ${SWIFT_CONFIG_PROXY_SERVER} filter:tempauth account_autocreate
    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:tempauth reseller_prefix "TEMPAUTH"

    if is_service_enabled swift3; then
        cat <<EOF >>${SWIFT_CONFIG_PROXY_SERVER}
[filter:s3token]
paste.filter_factory = keystonemiddleware.s3_token:filter_factory
auth_uri = ${KEYSTONE_AUTH_URI}
cafile = ${SSL_BUNDLE_FILE}
admin_user = swift
admin_tenant_name = ${SERVICE_PROJECT_NAME}
admin_password = ${SERVICE_PASSWORD}

[filter:swift3]
use = egg:swift3#swift3
location = ${REGION_NAME}
EOF
    fi

    cp ${SWIFT_DIR}/etc/swift.conf-sample ${SWIFT_CONF_DIR}/swift.conf
    iniset ${SWIFT_CONF_DIR}/swift.conf swift-hash swift_hash_path_suffix ${SWIFT_HASH}
    iniset ${SWIFT_CONF_DIR}/swift.conf swift-constraints max_header_size ${SWIFT_MAX_HEADER_SIZE}
    iniset ${SWIFT_CONF_DIR}/swift.conf swift-constraints max_file_size ${SWIFT_MAX_FILE_SIZE}

    local node_number
    for node_number in ${SWIFT_REPLICAS_SEQ}; do
        local swift_node_config=${SWIFT_CONF_DIR}/object-server/${node_number}.conf
        cp ${SWIFT_DIR}/etc/object-server.conf-sample ${swift_node_config}
        generate_swift_config_services ${swift_node_config} ${node_number} $(( OBJECT_PORT_BASE + 10 * (node_number - 1) )) object
        iniuncomment ${swift_node_config} DEFAULT bind_ip
        iniset ${swift_node_config} DEFAULT bind_ip ${SWIFT_SERVICE_LISTEN_ADDRESS}
        iniset ${swift_node_config} filter:recon recon_cache_path  ${SWIFT_DATA_DIR}/cache

        swift_node_config=${SWIFT_CONF_DIR}/container-server/${node_number}.conf
        cp ${SWIFT_DIR}/etc/container-server.conf-sample ${swift_node_config}
        generate_swift_config_services ${swift_node_config} ${node_number} $(( CONTAINER_PORT_BASE + 10 * (node_number - 1) )) container
        iniuncomment ${swift_node_config} DEFAULT bind_ip
        iniset ${swift_node_config} DEFAULT bind_ip ${SWIFT_SERVICE_LISTEN_ADDRESS}

        swift_node_config=${SWIFT_CONF_DIR}/account-server/${node_number}.conf
        cp ${SWIFT_DIR}/etc/account-server.conf-sample ${swift_node_config}
        generate_swift_config_services ${swift_node_config} ${node_number} $(( ACCOUNT_PORT_BASE + 10 * (node_number - 1) )) account
        iniuncomment ${swift_node_config} DEFAULT bind_ip
        iniset ${swift_node_config} DEFAULT bind_ip ${SWIFT_SERVICE_LISTEN_ADDRESS}
    done

    # Set new accounts in tempauth to match keystone project/user (to make testing easier)
    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:tempauth user_swiftprojecttest1_swiftusertest1 "testing .admin"
    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:tempauth user_swiftprojecttest2_swiftusertest2 "testing2 .admin"
    iniset ${SWIFT_CONFIG_PROXY_SERVER} filter:tempauth user_swiftprojecttest1_swiftusertest3 "testing3 .admin"

    testfile=${SWIFT_CONF_DIR}/test.conf
    cp ${SWIFT_DIR}/test/sample.conf ${testfile}

    # Set accounts for functional tests
    iniset ${testfile} func_test account swiftprojecttest1
    iniset ${testfile} func_test username swiftusertest1
    iniset ${testfile} func_test username3 swiftusertest3
    iniset ${testfile} func_test account2 swiftprojecttest2
    iniset ${testfile} func_test username2 swiftusertest2
    iniset ${testfile} func_test account4 swiftprojecttest4
    iniset ${testfile} func_test username4 swiftusertest4
    iniset ${testfile} func_test password4 testing4
    iniset ${testfile} func_test domain4 swift_test

    if is_service_enabled keystone; then
        iniuncomment ${testfile} func_test auth_version
        local auth_vers
        auth_vers=$(iniget ${testfile} func_test auth_version)
        iniset ${testfile} func_test auth_host ${KEYSTONE_SERVICE_HOST}
        if [[ "$KEYSTONE_AUTH_PROTOCOL" == "https" ]]; then
            iniset ${testfile} func_test auth_port 443
        else
            iniset ${testfile} func_test auth_port 80
        fi
        iniset ${testfile} func_test auth_uri ${KEYSTONE_AUTH_URI}
        if [[ "$auth_vers" == "3" ]]; then
            iniset ${testfile} func_test auth_prefix /identity/v3/
        else
            iniset ${testfile} func_test auth_prefix /identity/v2.0/
        fi
    fi

    local user_group
    user_group=$(id -g ${STACK_USER})
    sudo install -d -o ${STACK_USER} -g ${user_group} ${SWIFT_DATA_DIR}

    local swift_log_dir=${SWIFT_DATA_DIR}/logs
    sudo rm -rf ${swift_log_dir}
    sudo install -d -o ${STACK_USER} -g adm ${swift_log_dir}/hourly

    if [[ $SYSLOG != "False" ]]; then
        sed "s,%SWIFT_LOGDIR%,${swift_log_dir}," $FILES/swift/rsyslog.conf | sudo \
            tee /etc/rsyslog.d/10-swift.conf
        echo "MaxMessageSize 6k" | sudo tee /etc/rsyslog.d/99-maxsize.conf
        # restart syslog to take the changes
        sudo killall -HUP rsyslogd
    fi

    if [ "$SWIFT_USE_MOD_WSGI" == "True" ]; then
        _config_swift_apache_wsgi
    fi
}

# create_swift_disk - Create Swift backing disk
function create_swift_disk {
    local node_number

    # First do a bit of setup by creating the directories and
    # changing the permissions so we can run it as our user.

    local user_group
    user_group=$(id -g ${STACK_USER})
    sudo install -d -o ${STACK_USER} -g ${user_group} ${SWIFT_DATA_DIR}/{drives,cache,run,logs}

    # Create a loopback disk and format it to XFS.
    if [[ -e ${SWIFT_DISK_IMAGE} ]]; then
        if egrep -q ${SWIFT_DATA_DIR}/drives/sdb1 /proc/mounts; then
            sudo umount ${SWIFT_DATA_DIR}/drives/sdb1
            sudo rm -f ${SWIFT_DISK_IMAGE}
        fi
    fi

    mkdir -p ${SWIFT_DATA_DIR}/drives/images
    sudo touch ${SWIFT_DISK_IMAGE}
    sudo chown ${STACK_USER}: ${SWIFT_DISK_IMAGE}

    truncate -s ${SWIFT_LOOPBACK_DISK_SIZE} ${SWIFT_DISK_IMAGE}

    # Make a fresh XFS filesystem
    /sbin/mkfs.xfs -f -i size=1024  ${SWIFT_DISK_IMAGE}

    # Mount the disk with mount options to make it as efficient as possible
    mkdir -p ${SWIFT_DATA_DIR}/drives/sdb1
    if ! egrep -q ${SWIFT_DATA_DIR}/drives/sdb1 /proc/mounts; then
        sudo mount -t xfs -o loop,noatime,nodiratime,nobarrier,logbufs=8  \
            ${SWIFT_DISK_IMAGE} ${SWIFT_DATA_DIR}/drives/sdb1
    fi

    # Create a link to the above mount and
    # create all of the directories needed to emulate a few different servers
    local node_number
    for node_number in ${SWIFT_REPLICAS_SEQ}; do
        sudo ln -sf ${SWIFT_DATA_DIR}/drives/sdb1/$node_number ${SWIFT_DATA_DIR}/$node_number;
        local drive=${SWIFT_DATA_DIR}/drives/sdb1/${node_number}
        local node=${SWIFT_DATA_DIR}/${node_number}/node
        local node_device=${node}/sdb1
        [[ -d $node ]] && continue
        [[ -d $drive ]] && continue
        sudo install -o ${STACK_USER} -g $user_group -d $drive
        sudo install -o ${STACK_USER} -g $user_group -d $node_device
        sudo chown -R ${STACK_USER}: ${node}
    done
}

# create_swift_accounts() - Set up standard Swift accounts and extra
# one for tests we do this by attaching all words in the account name
# since we want to make it compatible with tempauth which use
# underscores for separators.

# Project             User               Roles          Domain
# -------------------------------------------------------------------
# service             swift              service        default
# swiftprojecttest1   swiftusertest1     admin          default
# swiftprojecttest1   swiftusertest3     anotherrole    default
# swiftprojecttest2   swiftusertest2     admin          default
# swiftprojecttest4   swiftusertest4     admin          swift_test

function create_swift_accounts {
    # Defines specific passwords used by ``tools/create_userrc.sh``
    # As these variables are used by ``create_userrc.sh,`` they must be exported
    # The _password suffix is expected by ``create_userrc.sh``.
    export swiftusertest1_password=testing
    export swiftusertest2_password=testing2
    export swiftusertest3_password=testing3
    export swiftusertest4_password=testing4

    local another_role
    another_role=$(get_or_create_role "anotherrole")

    # NOTE(jroll): Swift doesn't need the admin role here, however Ironic uses
    # temp urls, which break when uploaded by a non-admin role
    create_service_user "swift" "admin"

    get_or_create_service "swift" "object-store" "Swift Service"
    get_or_create_endpoint \
        "object-store" \
        "$REGION_NAME" \
        "$SWIFT_SERVICE_PROTOCOL://$SERVICE_HOST:$SWIFT_DEFAULT_BIND_PORT/v1/AUTH_\$(project_id)s" \
        "$SWIFT_SERVICE_PROTOCOL://$SERVICE_HOST:$SWIFT_DEFAULT_BIND_PORT"

    local swift_project_test1
    swift_project_test1=$(get_or_create_project swiftprojecttest1 default)
    die_if_not_set $LINENO swift_project_test1 "Failure creating swift_project_test1"
    SWIFT_USER_TEST1=$(get_or_create_user swiftusertest1 $swiftusertest1_password \
                        "default" "test@example.com")
    die_if_not_set $LINENO SWIFT_USER_TEST1 "Failure creating SWIFT_USER_TEST1"
    get_or_add_user_project_role admin $SWIFT_USER_TEST1 $swift_project_test1

    local swift_user_test3
    swift_user_test3=$(get_or_create_user swiftusertest3 $swiftusertest3_password \
                                "default" "test3@example.com")
    die_if_not_set $LINENO swift_user_test3 "Failure creating swift_user_test3"
    get_or_add_user_project_role $another_role $swift_user_test3 $swift_project_test1

    local swift_project_test2
    swift_project_test2=$(get_or_create_project swiftprojecttest2 default)
    die_if_not_set $LINENO swift_project_test2 "Failure creating swift_project_test2"

    local swift_user_test2
    swift_user_test2=$(get_or_create_user swiftusertest2 $swiftusertest2_password \
                                "default" "test2@example.com")
    die_if_not_set $LINENO swift_user_test2 "Failure creating swift_user_test2"
    get_or_add_user_project_role admin $swift_user_test2 $swift_project_test2

    local swift_domain
    swift_domain=$(get_or_create_domain swift_test 'Used for swift functional testing')
    die_if_not_set $LINENO swift_domain "Failure creating swift_test domain"

    local swift_project_test4
    swift_project_test4=$(get_or_create_project swiftprojecttest4 $swift_domain)
    die_if_not_set $LINENO swift_project_test4 "Failure creating swift_project_test4"

    local swift_user_test4
    swift_user_test4=$(get_or_create_user swiftusertest4 $swiftusertest4_password \
                                $swift_domain "test4@example.com")
    die_if_not_set $LINENO swift_user_test4 "Failure creating swift_user_test4"
    get_or_add_user_project_role admin $swift_user_test4 $swift_project_test4
}

# init_swift() - Initialize rings
function init_swift {
    local node_number
    # Make sure to kill all swift processes first
    swift-init --run-dir=${SWIFT_DATA_DIR}/run all stop || true

    # Forcibly re-create the backing filesystem
    create_swift_disk

    # This is where we create three different rings for swift with
    # different object servers binding on different ports.
    pushd ${SWIFT_CONF_DIR} >/dev/null && {

        rm -f *.builder *.ring.gz backups/*.builder backups/*.ring.gz

        swift-ring-builder object.builder create ${SWIFT_PARTITION_POWER_SIZE} ${SWIFT_REPLICAS} 1
        swift-ring-builder container.builder create ${SWIFT_PARTITION_POWER_SIZE} ${SWIFT_REPLICAS} 1
        swift-ring-builder account.builder create ${SWIFT_PARTITION_POWER_SIZE} ${SWIFT_REPLICAS} 1

        # The ring will be created on each node, and because the order of
        # nodes is identical we can use a seed for rebalancing, making it
        # possible to get a ring on each node that uses the same partition
        # assignment.
        if [[ -n $SWIFT_STORAGE_IPS ]]; then
            local node_number
            node_number=1

            for node in ${SWIFT_STORAGE_IPS}; do
                swift-ring-builder object.builder add z${node_number}-${node}:${OBJECT_PORT_BASE}/sdb1 1
                swift-ring-builder container.builder add z${node_number}-${node}:${CONTAINER_PORT_BASE}/sdb1 1
                swift-ring-builder account.builder add z${node_number}-${node}:${ACCOUNT_PORT_BASE}/sdb1 1
                let "node_number=node_number+1"
            done

        else

            for node_number in ${SWIFT_REPLICAS_SEQ}; do
                swift-ring-builder object.builder add z${node_number}-${SWIFT_SERVICE_LOCAL_HOST}:$(( OBJECT_PORT_BASE + 10 * (node_number - 1) ))/sdb1 1
                swift-ring-builder container.builder add z${node_number}-${SWIFT_SERVICE_LOCAL_HOST}:$(( CONTAINER_PORT_BASE + 10 * (node_number - 1) ))/sdb1 1
                swift-ring-builder account.builder add z${node_number}-${SWIFT_SERVICE_LOCAL_HOST}:$(( ACCOUNT_PORT_BASE + 10 * (node_number - 1) ))/sdb1 1
            done
        fi

        # We use a seed for rebalancing. Doing this allows us to create
        # identical rings on multiple nodes if SWIFT_STORAGE_IPS is the same
        swift-ring-builder object.builder rebalance 42
        swift-ring-builder container.builder rebalance 42
        swift-ring-builder account.builder rebalance 42
    } && popd >/dev/null

    # Create cache dir
    sudo install -d -o ${STACK_USER} $SWIFT_AUTH_CACHE_DIR
    rm -f $SWIFT_AUTH_CACHE_DIR/*
}

function install_swift {
    git_clone $SWIFT_REPO $SWIFT_DIR $SWIFT_BRANCH
    setup_develop $SWIFT_DIR
    if [ "$SWIFT_USE_MOD_WSGI" == "True" ]; then
        install_apache_wsgi
    fi
}

function install_swiftclient {
    if use_library_from_git "python-swiftclient"; then
        git_clone_by_name "python-swiftclient"
        setup_dev_lib "python-swiftclient"
    fi
}

# install_ceilometermiddleware() - Collect source and prepare
#   note that this doesn't really have anything to do with ceilometer;
#   though ceilometermiddleware has ceilometer in its name as an
#   artifact of history, it is not a ceilometer specific tool. It
#   simply generates pycadf-based notifications about requests and
#   responses on the swift proxy
function install_ceilometermiddleware {
    if use_library_from_git "ceilometermiddleware"; then
        git_clone_by_name "ceilometermiddleware"
        setup_dev_lib "ceilometermiddleware"
    else
        pip_install_gr ceilometermiddleware
    fi
}

# start_swift() - Start running processes, including screen
function start_swift {
    # (re)start memcached to make sure we have a clean memcache.
    restart_service memcached

    # Start rsync
    if is_ubuntu; then
        sudo /etc/init.d/rsync restart || :
    elif [ -e /etc/xinetd.d/rsync ]; then
        start_service xinetd
    else
        start_service rsyncd
    fi

    if [ "$SWIFT_USE_MOD_WSGI" == "True" ]; then
        # Apache should serve the "PACO" a.k.a "main" services
        restart_apache_server
        # The rest of the services should be started in backgroud
        swift-init --run-dir=${SWIFT_DATA_DIR}/run rest start
        # Be we still want the logs of Swift Proxy in our screen session
        tail_log s-proxy /var/log/$APACHE_NAME/proxy-server
        if [[ ${SWIFT_REPLICAS} == 1 ]]; then
            for type in object container account; do
                tail_log s-${type} /var/log/$APACHE_NAME/${type}-server-1
            done
        fi
        return 0
    fi


    # By default with only one replica we are launching the proxy, container
    # account and object server in screen in foreground. Then, the rest of
    # the services is optionally started.
    #
    # If we have ``SWIFT_REPLICAS`` set to something greater than one
    # we first spawn *all* the Swift services then kill the proxy service
    # so we can run it in foreground in screen.
    #
    # ``swift-init ... {stop|restart}`` exits with '1' if no servers are
    #  running, ignore it just in case
    if [[ ${SWIFT_REPLICAS} == 1 ]]; then
        local foreground_services type

        foreground_services="object container account"
        for type in ${foreground_services}; do
            run_process s-${type} "$SWIFT_BIN_DIR/swift-${type}-server ${SWIFT_CONF_DIR}/${type}-server/1.conf -v"
        done

        if [[ "$SWIFT_START_ALL_SERVICES" == "True" ]]; then
            swift-init --run-dir=${SWIFT_DATA_DIR}/run rest start
        else
            # The container-sync daemon is strictly needed to pass the container
            # sync Tempest tests.
            swift-init --run-dir=${SWIFT_DATA_DIR}/run container-sync start
        fi
    else
        swift-init --run-dir=${SWIFT_DATA_DIR}/run all restart || true
        swift-init --run-dir=${SWIFT_DATA_DIR}/run proxy stop || true
    fi

    if is_service_enabled tls-proxy; then
        local proxy_port=${SWIFT_DEFAULT_BIND_PORT}
        start_tls_proxy swift '*' $proxy_port $SERVICE_HOST $SWIFT_DEFAULT_BIND_PORT_INT
    fi
    run_process s-proxy "$SWIFT_BIN_DIR/swift-proxy-server ${SWIFT_CONF_DIR}/proxy-server.conf -v"

    if [[ "$SWIFT_ENABLE_TEMPURLS" == "True" ]]; then
        swift_configure_tempurls
    fi
}

# stop_swift() - Stop running processes (non-screen)
function stop_swift {
    local type

    if [ "$SWIFT_USE_MOD_WSGI" == "True" ]; then
        swift-init --run-dir=${SWIFT_DATA_DIR}/run rest stop && return 0
    fi

    # screen normally killed by ``unstack.sh``
    if type -p swift-init >/dev/null; then
        swift-init --run-dir=${SWIFT_DATA_DIR}/run all stop || true
    fi
    # Dump all of the servers
    # Maintain the iteration as stop_process() has some desirable side-effects
    for type in proxy object container account; do
        stop_process s-${type}
    done
    # Blast out any stragglers
    pkill -f swift- || true
}

function swift_configure_tempurls {
    # note we are using swift credentials!
    OS_USERNAME=swift \
    OS_PASSWORD=$SERVICE_PASSWORD \
    OS_USER_DOMAIN_NAME=$SERVICE_DOMAIN_NAME \
    OS_PROJECT_NAME=$SERVICE_PROJECT_NAME \
    OS_PROJECT_DOMAIN_NAME=$SERVICE_DOMAIN_NAME \
    openstack object store account \
        set --property "Temp-URL-Key=$SWIFT_TEMPURL_KEY"
}

# Restore xtrace
$_XTRACE_LIB_SWIFT

# Tell emacs to use shell-script-mode
## Local variables:
## mode: shell-script
## End: