#!/bin/sh
#
# Resource script for MySQL Proxy
#
# Description:  Manages MySQL Proxy as an OCF resource in
#               an high-availability setup.
#
#               Tested with MySQL Proxy 0.8.1 and 0.8.3 on Debian 6.0.
#
#               Based on the mysql and Pure-Ftpd OCF resource agents.
#
# Author:       Raoul Bhatia <r.bhatia@ipax.at> : Original Author
# License:      GNU General Public License (GPL)
#
#
#       usage: $0 {start|stop|reload|status|monitor|validate-all|meta-data}
#
#       The "start" arg starts a MySQL Proxy instance
#
#       The "stop" arg stops it.
#
# TODO
# * add in-depth monitoring by querying the mysql-proxy admin port
#
# Test via
# (note: this did not work with MySQL Proxy 0.8.1 and ocf-tester from resource-agents 3.9.2 on Debian 6.0)
#
# * /usr/sbin/ocf-tester -n mp -o binary="/usr/sbin/mysql-proxy" -o defaults_file="" -o parameters="--proxy-skip-profiling" \
#       -o admin_address="127.0.0.1:4041" -o admin_username="root" -o admin_password="la" -o admin_lua_script="/usr/lib/mysql-proxy/lua/admin.lua" \
#       -o proxy_backend_addresses="192.168.100.200:42006" -o proxy_address="/var/run/mysqld/mysqld.sock" /usr/lib/ocf/resource.d/heartbeat/mysql-proxy
#
#
# OCF parameters:
#  OCF_RESKEY_binary
#  OCF_RESKEY_client_binary
#  OCF_RESKEY_defaults_file
#  OCF_RESKEY_proxy_backend_addresses
#  OCF_RESKEY_proxy_read_only_backend_addresses
#  OCF_RESKEY_proxy_address
#  OCF_RESKEY_log_level
#  OCF_RESKEY_keepalive
#  OCF_RESKEY_plugins
#  OCF_RESKEY_admin_address
#  OCF_RESKEY_admin_username
#  OCF_RESKEY_admin_password
#  OCF_RESKEY_admin_lua_script
#  OCF_RESKEY_test_table
#  OCF_RESKEY_test_user
#  OCF_RESKEY_test_passwd
#  OCF_RESKEY_parameters
#  OCF_RESKEY_pidfile
#
##########################################################################

# Initialization:

: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs

# Parameter defaults

OCF_RESKEY_binary_default="/usr/sbin/mysql-proxy"
OCF_RESKEY_client_binary_default="mysql"
OCF_RESKEY_defaults_file_default=""
OCF_RESKEY_proxy_backend_addresses_default="127.0.0.1:3306"
OCF_RESKEY_proxy_read_only_backend_addresses_default=""
OCF_RESKEY_proxy_address_default=":4040"
OCF_RESKEY_log_level_default=""
OCF_RESKEY_keepalive_default=""
OCF_RESKEY_plugins_default=""
OCF_RESKEY_admin_address_default="127.0.0.1:4041"
OCF_RESKEY_admin_username_default=""
OCF_RESKEY_admin_password_default=""
OCF_RESKEY_admin_lua_script_default=""
OCF_RESKEY_test_table_default="mysql.user"
OCF_RESKEY_test_user_default=""
OCF_RESKEY_test_passwd_default=""
OCF_RESKEY_parameters_default=""
OCF_RESKEY_pidfile_default="${HA_RSCTMP}/mysql-proxy-${OCF_RESOURCE_INSTANCE}.pid"

: ${OCF_RESKEY_binary=${OCF_RESKEY_binary_default}}
: ${OCF_RESKEY_client_binary=${OCF_RESKEY_client_binary_default}}
: ${OCF_RESKEY_defaults_file=${OCF_RESKEY_defaults_file_default}}
: ${OCF_RESKEY_proxy_backend_addresses=${OCF_RESKEY_proxy_backend_addresses_default}}
: ${OCF_RESKEY_proxy_read_only_backend_addresses=${OCF_RESKEY_proxy_read_only_backend_addresses_default}}
: ${OCF_RESKEY_proxy_address=${OCF_RESKEY_proxy_address_default}}
: ${OCF_RESKEY_log_level=${OCF_RESKEY_log_level_default}}
: ${OCF_RESKEY_keepalive=${OCF_RESKEY_keepalive_default}}
: ${OCF_RESKEY_plugins=${OCF_RESKEY_plugins_default}}
: ${OCF_RESKEY_admin_address=${OCF_RESKEY_admin_address_default}}
: ${OCF_RESKEY_admin_username=${OCF_RESKEY_admin_username_default}}
: ${OCF_RESKEY_admin_password=${OCF_RESKEY_admin_password_default}}
: ${OCF_RESKEY_admin_lua_script=${OCF_RESKEY_admin_lua_script_default}}
: ${OCF_RESKEY_test_table=${OCF_RESKEY_test_table_default}}
: ${OCF_RESKEY_test_user=${OCF_RESKEY_test_user_default}}
: ${OCF_RESKEY_test_passwd=${OCF_RESKEY_test_passwd_default}}
: ${OCF_RESKEY_parameters=${OCF_RESKEY_parameters_default}}
: ${OCF_RESKEY_pidfile=${OCF_RESKEY_pidfile_default}}

USAGE="Usage: $0 {start|stop|reload|status|monitor|validate-all|meta-data}"

##########################################################################

usage() {
    echo $USAGE >&2
}

meta_data() {
        cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="mysql-proxy" version="0.1">
<version>1.0</version>
<longdesc lang="en">
This script manages MySQL Proxy as an OCF resource in a high-availability setup.

The default monitor operation will verify that mysql-proxy is running.

The level 10 monitor operation is left out intentionally for possible future enhancements in conjunction with the admin plugin.

The level 20 monitor operation will perform a SELECT on a given table to verify that the connection to a back-end server is actually working.

Tested with MySQL Proxy 0.8.1 and 0.8.3 on Debian 6.0.
</longdesc>
<shortdesc lang="en">Manages a MySQL Proxy instance</shortdesc>

<parameters>

<parameter name="binary" unique="0" required="0">
<longdesc lang="en">
Full path to the MySQL Proxy binary.
For example, "/usr/sbin/mysql-proxy".
</longdesc>
<shortdesc lang="en">Full path to MySQL Proxy binary</shortdesc>
<content type="string" default="${OCF_RESKEY_binary_default}" />
</parameter>

<parameter name="client_binary" unique="0" required="0">
<longdesc lang="en">
Location of the MySQL client binary.
</longdesc>
<shortdesc lang="en">MySQL client binary</shortdesc>
<content type="string" default="${OCF_RESKEY_client_binary_default}" />
</parameter>

<parameter name="defaults_file" unique="0" required="0">
<longdesc lang="en">
Full path to a MySQL Proxy configuration file.
For example, "/etc/mysql-proxy.conf".
</longdesc>
<shortdesc lang="en">Full path to configuration file</shortdesc>
<content type="string" default="${OCF_RESKEY_defaults_file_default}" />
</parameter>

<parameter name="proxy_backend_addresses" unique="0" required="0">
<longdesc lang="en">
Address:port of the remote back-end servers (default: 127.0.0.1:3306).
</longdesc>
<shortdesc lang="en">MySQL Proxy back-end servers</shortdesc>
<content type="string" default="${OCF_RESKEY_proxy_backend_addresses_default}" />
</parameter>

<parameter name="proxy_read_only_backend_addresses" unique="0" required="0">
<longdesc lang="en">
Address:port of the remote (read only) unpromoted-server (default: ).
</longdesc>
<shortdesc lang="en">MySql Proxy read only back-end servers</shortdesc>
<content type="string" default="${OCF_RESKEY_proxy_read_only_backend_addresses_default}" />
</parameter>

<parameter name="proxy_address" unique="0" required="0">
<longdesc lang="en">
Listening address:port of the proxy server (default: :4040).
You can also specify a socket like "/var/run/mysql-proxy.sock".
</longdesc>
<shortdesc lang="en">MySQL Proxy listening address</shortdesc>
<content type="string" default="${OCF_RESKEY_proxy_address_default}" />
</parameter>

<parameter name="log_level" unique="0" required="0">
<longdesc lang="en">
Log all messages of level (error|warning|info|message|debug|) or higher.
An empty value disables logging.
</longdesc>
<shortdesc lang="en">MySQL Proxy log level.</shortdesc>
<content type="string" default="${OCF_RESKEY_log_level_default}" />
</parameter>

<parameter name="keepalive" unique="0" required="0">
<longdesc lang="en">
Try to restart the proxy if it crashed (default: ).
Valid values: true or false. An empty value equals "false".
</longdesc>
<shortdesc lang="en">Use keepalive option</shortdesc>
<content type="string" default="${OCF_RESKEY_keepalive_default}" />
</parameter>

<parameter name="plugins" unique="0" required="0">
<longdesc lang="en">
Whitespace separated list of plugins to load (default: ).
Note: The admin plugin will be auto-loaded in case you specify an admin_* parameter.
</longdesc>
<shortdesc lang="en">MySQL Proxy plugins</shortdesc>
<content type="string" default="${OCF_RESKEY_plugins_default}" />
</parameter>

<parameter name="admin_address" unique="0" required="0">
<longdesc lang="en">
Listening address:port of the admin plugin (default: 127.0.0.1:4041).
Note: The admin plugin will be auto-loaded in case you specify an admin_* parameter.
</longdesc>
<shortdesc lang="en">MySQL Proxy admin plugin listening address</shortdesc>
<content type="string" default="${OCF_RESKEY_admin_address_default}" />
</parameter>

<parameter name="admin_username" unique="0" required="0">
<longdesc lang="en">
Username for the admin plugin (default: ).
Required since MySQL Proxy 0.8.1, if the admin plugin is loaded.
Note: The admin plugin will be auto-loaded in case you specify an admin_* parameter.
</longdesc>
<shortdesc lang="en">MySQL Proxy admin plugin username</shortdesc>
<content type="string" default="${OCF_RESKEY_admin_username_default}" />
</parameter>

<parameter name="admin_password" unique="0" required="0">
<longdesc lang="en">
Password for the admin plugin (default: ).
Required since MySQL Proxy 0.8.1, if the admin plugin is loaded.
Note: The admin plugin will be auto-loaded in case you specify an admin_* parameter.
</longdesc>
<shortdesc lang="en">MySQL Proxy admin plugin password</shortdesc>
<content type="string" default="${OCF_RESKEY_admin_password_default}" />
</parameter>

<parameter name="admin_lua_script" unique="0" required="0">
<longdesc lang="en">
Script to execute by the admin plugin.
Required since MySQL Proxy 0.8.1, if the admin plugin is loaded.
Note: The admin plugin will be auto-loaded in case you specify an admin_* parameter.
</longdesc>
<shortdesc lang="en">MySQL Proxy admin plugin lua script</shortdesc>
<content type="string" default="${OCF_RESKEY_admin_lua_script_default}" />
</parameter>

<parameter name="test_table" unique="0" required="0">
<longdesc lang="en">
Table to be tested in monitor statement (in database.table notation)
</longdesc>
<shortdesc lang="en">MySQL test table</shortdesc>
<content type="string" default="${OCF_RESKEY_test_table_default}" />
</parameter>

<parameter name="test_user" unique="0" required="0">
<longdesc lang="en">
MySQL test user
</longdesc>
<shortdesc lang="en">MySQL test user</shortdesc>
<content type="string" default="${OCF_RESKEY_test_user_default}" />
</parameter>

<parameter name="test_passwd" unique="0" required="0">
<longdesc lang="en">
MySQL test user password
</longdesc>
<shortdesc lang="en">MySQL test user password</shortdesc>
<content type="string" default="${OCF_RESKEY_test_passwd_default}" />
</parameter>

<parameter name="parameters" unique="0" required="0">
<longdesc lang="en">
The MySQL Proxy daemon may be called with additional parameters.
Specify any of them here.
</longdesc>
<shortdesc lang="en">MySQL Proxy additional parameters</shortdesc>
<content type="string" default="${OCF_RESKEY_parameters_default}" />
</parameter>

<parameter name="pidfile" unique="1" required="0">
<longdesc lang="en">PID file</longdesc>
<shortdesc lang="en">PID file</shortdesc>
<content type="string" default="${OCF_RESKEY_pidfile_default}" />
</parameter>

</parameters>

<actions>
<action name="start"   timeout="30s" />
<action name="stop"    timeout="30s" />
<action name="reload"  timeout="30s" />
<action name="monitor" depth="0"  timeout="20s" interval="60s" />
<action name="validate-all"  timeout="30s" />
<action name="meta-data"  timeout="5s" />
</actions>
</resource-agent>
END
}

isRunning()
{
    kill -s 0 "$1" 2>/dev/null
}

mysqlproxy_status()
{
    local PID

    if [ -f "${pidfile}" ]; then
    # MySQL Proxy is probably running
        PID=`head -n 1 "${pidfile}"`
        if [ ! -z "$PID" ] ; then
            isRunning "$PID"
            return $?
        fi
    fi

    # MySQL Proxy is not running
    false
}

mysqlproxy_start()
{
    local PARAM_PREFIX OPTIONS
    local p pa pba proba
    local pid_dir socket_dir

    # if MySQL Proxy is running return success
    if mysqlproxy_status ; then
        ocf_log info "MySQL Proxy already running."
        return $OCF_SUCCESS
    fi

    PARAM_PREFIX=''

    # MySQL Proxy plugins to load
    # @TODO check if the plugins are actually available?
    if ocf_is_true $plugin_support; then
        for p in $plugins; do
            PARAM_PREFIX="$PARAM_PREFIX --plugins=$p"
        done
    fi

    # check if the MySQL Proxy defaults-file exist
    if [ -f "$defaults_file" ]; then
        PARAM_PREFIX="$PARAM_PREFIX --defaults-file=$defaults_file"
    fi

    # set log-level
    if [ ! -z "$log_level" ]; then
        PARAM_PREFIX="$PARAM_PREFIX --log-level=$log_level"
    fi

    # set keepalive
    if [ "$keepalive" = "true" ]; then
        PARAM_PREFIX="$PARAM_PREFIX --keepalive"
    fi

    # honor admin_* options
    if [ ! -z "$admin_username" ]; then
        PARAM_PREFIX="$PARAM_PREFIX --admin-username=$admin_username"
    fi
    if [ ! -z "$admin_password" ]; then
        PARAM_PREFIX="$PARAM_PREFIX --admin-password=$admin_password"
    fi
    if [ ! -z "$admin_lua_script" ]; then
        PARAM_PREFIX="$PARAM_PREFIX --admin-lua-script=$admin_lua_script"
    fi

    # make sure that the pid directory exists
    pid_dir=`dirname $pidfile`
    if [ ! -d $pid_dir ] ; then
        ocf_log info "Creating PID directory '$pid_dir'."
        mkdir -p $pid_dir
        #chown $OCF_RESKEY_user:$OCF_RESKEY_group $pid_dir # c/p from mysql ra; currently not needed
    fi

    # split multiple proxy-address options.
    # currently unsupported but let us hope for the future ;)
    for pa in $proxy_address; do
        [ -z "$pa" ] && continue
        OPTIONS=" $OPTIONS --proxy-address=$pa"

        # if $pa contains a slash, we are dealing with a socket
        # make sure that the socket directory exists
        if echo "$pa" | grep -q '/' ; then
            socket_dir=`dirname $pa`
            if [ ! -d $socket_dir ] ; then
                ocf_log info "Creating socket directory '$socket_dir'."
                mkdir -p $socket_dir
                #chown $OCF_RESKEY_user:$OCF_RESKEY_group $socket_dir # c/p from mysql ra; currently not needed
            fi
        fi
    done

    # split multiple proxy-backend-addresses options.
    for pba in $proxy_backend_addresses; do
        [ -z "$pba" ] && continue
        OPTIONS=" $OPTIONS --proxy-backend-addresses=$pba"
    done

    # split multiple proxy-backend-addresses options.
    for proba in $proxy_read_only_backend_addresses; do
        [ -z "$proba" ] && continue
        OPTIONS=" $OPTIONS --proxy-read-only-backend-addresses=$proba"
    done

    # build $OPTIONS and add admin-address and pidfile
    OPTIONS="$PARAM_PREFIX $OPTIONS --admin-address=$admin_address --pid-file=${pidfile}"

    # add additional parameters
    if [ -n "$parameters" ]; then
        OPTIONS="$OPTIONS $parameters"
    fi

    # start MySQL Proxy
    #start-stop-daemon --start --quiet --pidfile $pidfile --make-pidfile --name mysql-proxy --startas $binary -b -- $OPTIONS
    $binary --daemon $OPTIONS
    ret=$?

    if [ $ret -ne 0 ]; then
        ocf_log err "MySQL Proxy returned error: " $ret
        return $OCF_ERR_GENERIC
    fi

    # @TODO add an initial monitoring action?

    return $OCF_SUCCESS
}


mysqlproxy_stop()
{
    local ret
    local pa

    if mysqlproxy_status ; then
        #start-stop-daemon --stop --quiet --retry 3 --exec $binary --pidfile $pidfile
        /bin/kill `cat "${pidfile}"`
        ret=$?

        if [ $ret -ne 0 ]; then
            ocf_log err "MySQL Proxy returned an error while stopping: " $ret
            return $OCF_ERR_GENERIC
        fi

        # grant some time for shutdown and recheck
        sleep 1
        if mysqlproxy_status ; then
            ocf_log err "MySQL Proxy failed to stop."
            return $OCF_ERR_GENERIC
        fi

        # remove dangling socketfile, if specified
        for pa in $proxy_address; do
            if [ -S "$pa" ]; then
                ocf_log info "Removing dangling socket file '$pa'."
                rm -f "$pa"
            fi
        done

        # remove dangling pidfile
        if [ -f "${pidfile}" ]; then
            ocf_log info "Removing dangling pidfile '${pidfile}'."
            rm -f "${pidfile}"
        fi
    fi

    return $OCF_SUCCESS
}

mysqlproxy_reload()
{
    # @TODO check if pidfile is empty
    # PID=`head -n 1 "${pidfile}"`
    #    if [ ! -z "$PID" ] ; then

    if mysqlproxy_status; then
        ocf_log info "Reloading MySQL Proxy."
        kill -s HUP `cat ${pidfile}`
    fi
}

mysqlproxy_monitor()
{
    local rc

    if [ "${OCF_RESKEY_CRM_meta_interval:-0}" -eq "0" ]; then
        # in case of probe, monitor operation is surely treated as
        # under suspension. This will call start operation.
        # (c/p from ocf:heartbeat:sfex)
        mysqlproxy_validate_all
        rc=$?
        [ $rc -ne 0 ] && return $rc
    fi

    if ! mysqlproxy_status ; then
        return $OCF_NOT_RUNNING
    fi

    if [ $OCF_CHECK_LEVEL -eq 20 ]; then
        mysqlproxy_monitor_20
        rc=$?
        [ $rc -ne 0 ] && return $rc
    fi

    return $OCF_SUCCESS
}

mysqlproxy_monitor_20()
{
    local rc
    local mysql_options pa
    local mysql_server_parameter mysql_server_host mysql_server_port

    if [ -z "$OCF_RESKEY_test_table" -o -z "$OCF_RESKEY_test_user" -a -z "$OCF_RESKEY_test_passwd" ]; then
        ocf_log warn "Missing proper configuration for OCF_CHECK_LEVEL=20 (test_table=[$OCF_RESKEY_test_table] test_user=[$OCF_RESKEY_test_user] test_password=[$OCF_RESKEY_test_passwd]). Not running in-depth monitoring."
        return $OCF_SUCCESS
    fi

    mysql_options="--connect_timeout=10 --user=$OCF_RESKEY_test_user --password=$OCF_RESKEY_test_passwd"

    # cycle each address
    for pa in $proxy_address; do
        # build correct connect parameter
        if [ -S "$pa" ]; then
            # we need to monitor a mysql socket
            mysql_server_parameter="--socket=$pa"
        else
            # we need to monitor a host address
            mysql_server_parameter=""

            # split host:port
            # @TODO correctly handle IPv6 address
            # @TODO correctly handle 0.0.0.0 address
            mysql_server_host=`echo $pa | cut -d : -f 1`
            mysql_server_port=`echo $pa | cut -d : -f 2`

            if [ -n "$mysql_server_host" ]; then
                mysql_server_parameter="$mysql_server_parameter --host=$mysql_server_host"
            fi
            if [ -n "$mysql_server_port" ]; then
                mysql_server_parameter="$mysql_server_parameter --port=$mysql_server_port"
            fi
        fi

        # Check for test table
        ocf_run $mysql $mysql_server_parameter $mysql_options \
            -e "SELECT COUNT(*) FROM $OCF_RESKEY_test_table"
        rc=$?

        if [ $rc -ne 0 ]; then
            ocf_log err "Failed to select from $OCF_RESKEY_test_table: " $rc
            return $OCF_ERR_GENERIC
        fi
    done

    return $OCF_SUCCESS
}

mysqlproxy_validate_all()
{
    # local variables
    local config_error=0

    # check that the MySQL Proxy binary exists and can be executed
    check_binary $binary

    # check MySQL client binary only if in-depth monitoring is requested
    # do not break backwards compatibility otherwise
    if [ $OCF_CHECK_LEVEL -gt 0 ]; then
        check_binary $mysql
    fi

    # check for valid log-level
    echo $log_level | egrep -q "^(error|warning|info|message|debug|)$"
    if [ $? -ne 0 ]; then
        ocf_log err "MySQL Proxy log level '$log_level' not in valid range error|warning|info|message|debug"
        return $OCF_ERR_CONFIGURED
    fi


    # if we're running MySQL Proxy > 0.8.1 and there is any admin parameter set,
    # explicitly load the admin (and the proxy) plugin.
    # (version 0.8.2 does not load the admin plugin by default anymore)
    ocf_version_cmp "$version" "0.8.1"
    ret=$?
    if [ $ret -eq 2 ]; then
        # simple check: concat all parameters and check if the string has non-zero length
        if [ -n "$admin_username$admin_password$admin_lua_script$admin_address" ]; then
            plugins="proxy admin"
            has_plugin_admin=1
        else
            has_plugin_admin=0
        fi
    fi


    # check for required admin_* parameters for 0.8.1 and 0.8.2 (with admin module)
    # translated: if (version == 0.8.1 or (version > 0.8.1 and has_plugin_admin))
    if [ $ret -eq 1 -o \( $ret -eq 2 -a $has_plugin_admin -eq 1 \) ]; then
        if [ -z "$admin_username" ]; then
            ocf_log err "Missing required parameter \"admin_username\""
            config_error=1
        fi
        if [ -z "$admin_password" ]; then
            ocf_log err "Missing required parameter \"admin_password\""
            config_error=1
        fi
        if [ -z "$admin_lua_script" ]; then
            ocf_log err "Missing required parameter \"admin_lua_script\""
            config_error=1
        fi

        # check if the admin_lua_script, if specified, exists
        if [ -n "$admin_lua_script" -a ! -e "$admin_lua_script" ]; then
            ocf_log err "MySQL Proxy admin lua script '$admin_lua_script' does not exist or is not readable."
        fi
    fi

    # issue a warning during start if the user wants to load a plugin
    # but this version of MySQL Proxy does not support the plugin architecture.
    if [ -n "$plugins" ] && ocf_is_false "$plugin_support" && [ $__OCF_ACTION = 'start' ]; then
        ocf_log warn "You are running MySQL Proxy version '$version'. This version does not support the plugin architecture. Please use version 0.7.0 or later to load the plugins '$plugins'."
    fi

    # exit in case we have found relevant config errors
    if [ $config_error -eq 1 ]; then
        exit $OCF_ERR_CONFIGURED
    fi

    return $OCF_SUCCESS
}

#
# Main
#

if [ $# -ne 1 ]; then
    usage
    exit $OCF_ERR_ARGS
fi

pidfile=$OCF_RESKEY_pidfile
binary=$OCF_RESKEY_binary
defaults_file=$OCF_RESKEY_defaults_file
proxy_backend_addresses=$OCF_RESKEY_proxy_backend_addresses
proxy_read_only_backend_addresses=$OCF_RESKEY_proxy_read_only_backend_addresses
admin_address=$OCF_RESKEY_admin_address
admin_username=$OCF_RESKEY_admin_username
admin_password=$OCF_RESKEY_admin_password
admin_lua_script=$OCF_RESKEY_admin_lua_script
proxy_address=$OCF_RESKEY_proxy_address
log_level=$OCF_RESKEY_log_level
keepalive=$OCF_RESKEY_keepalive
plugins=`echo $OCF_RESKEY_plugins | tr "[:space:]" "\n" | sort -u`
mysql=$OCF_RESKEY_client_binary
parameters=$OCF_RESKEY_parameters
plugin_support=false
has_plugin_admin=0 # 0 because this simplifies the if statements

# debugging stuff
#echo OCF_RESKEY_binary=$OCF_RESKEY_binary >> /tmp/prox_conf_$OCF_RESOURCE_INSTANCE
#echo OCF_RESKEY_defaults_file=$OCF_RESKEY_defaults_file >> /tmp/prox_conf_$OCF_RESOURCE_INSTANCE
#echo OCF_RESKEY_proxy_backend_addresses=$OCF_RESKEY_proxy_backend_addresses >> /tmp/prox_conf_$OCF_RESOURCE_INSTANCE
#echo OCF_RESKEY_proxy_read_only_backend_addresses=$OCF_RESKEY_proxy_read_only_backend_addresses >> /tmp/prox_conf_$OCF_RESOURCE_INSTANCE
#echo OCF_RESKEY_proxy_address=$OCF_RESKEY_proxy_address >> /tmp/prox_conf_$OCF_RESOURCE_INSTANCE
#echo OCF_RESKEY_log_level=$OCF_RESKEY_log_level >> /tmp/prox_conf_$OCF_RESOURCE_INSTANCE
#echo OCF_RESKEY_keepalive=$OCF_RESKEY_keepalive >> /tmp/prox_conf_$OCF_RESOURCE_INSTANCE
#echo OCF_RESKEY_admin_address=$OCF_RESKEY_admin_address >> /tmp/prox_conf_$OCF_RESOURCE_INSTANCE
#echo OCF_RESKEY_admin_username=$OCF_RESKEY_admin_username >> /tmp/prox_conf_$OCF_RESOURCE_INSTANCE
#echo OCF_RESKEY_admin_password=$OCF_RESKEY_admin_password >> /tmp/prox_conf_$OCF_RESOURCE_INSTANCE
#echo OCF_RESKEY_admin_lua_script=$OCF_RESKEY_admin_lua_script >> /tmp/prox_conf_$OCF_RESOURCE_INSTANCE
#echo OCF_RESKEY_parameters=$OCF_RESKEY_parameters >> /tmp/prox_conf_$OCF_RESOURCE_INSTANCE
#echo OCF_RESKEY_pidfile=$OCF_RESKEY_pidfile >> /tmp/prox_conf_$OCF_RESOURCE_INSTANCE


# handle some parameters before performing any additional checks
case $1 in
    meta-data)  meta_data
                exit $?
                ;;

    usage)      usage
                exit $OCF_SUCCESS
                ;;
esac


# determine MySQL Proxy version
check_binary $binary
version=`$binary --version | grep ^mysql-proxy | awk '{print $NF}'`

# version 0.7.0 (and later) support the plugin architecture and load the admin plugin by default
# version 0.8.1 loads admin plugin by default and requires the admin parameters to be set
# version 0.8.2 does not load the admin plugin by default anymore
ocf_version_cmp "$version" "0.7.0"
ret=$?
if [ $ret -eq 1 -o $ret -eq 2 ]; then
    plugin_support=true
    has_plugin_admin=1
fi


# perform action
case $1 in
    start)      mysqlproxy_validate_all &&
                mysqlproxy_start
                exit $?
                ;;

    stop)       mysqlproxy_validate_all &&
                mysqlproxy_stop
                exit $?
                ;;

    reload)     mysqlproxy_reload
                exit $?
                ;;

    status)     if mysqlproxy_status; then
                    ocf_log info "MySQL Proxy is running."
                    exit $OCF_SUCCESS
                else
                    ocf_log info "MySQL Proxy is stopped."
                    exit $OCF_NOT_RUNNING
                fi
                ;;

    monitor)    mysqlproxy_monitor
                exit $?
                ;;

    validate-all)   mysqlproxy_validate_all
                    exit $?
                    ;;


    *)          usage
                exit $OCF_ERR_UNIMPLEMENTED
                ;;
esac