====== HAProxy 納入 Zabbix 監控 ======
  * Prerequisites
    * Zabbix Server >= 2.x
    * Zabbix Frontend >= 2.x
    * HAProxy >= 1.3
    * Socat

===== @HAProxy Server 安裝程序 =====
  * 新增 userparameter_haproxy.conf <code sh>
vi /etc/zabbix/zabbix_agentd.d/userparameter_haproxy.conf</code><file>
#
# Discovery Rule
#

# HAProxy Frontend, Backend and Server Discovery rules
UserParameter=haproxy.list.discovery[*],/usr/local/bin/haproxy_discovery.sh $1 $2


# Frontend / Backend current sessions
UserParameter=haproxy.stat.bin[*],echo "show stat"    | socat $1 stdio | grep "^$2,$3" | cut -d, -f9
UserParameter=haproxy.stat.bout[*],echo "show stat"   | socat $1 stdio | grep "^$2,$3" | cut -d, -f10
UserParameter=haproxy.stat.scur[*],echo "show stat"   | socat $1 stdio | grep "^$2,$3" | cut -d, -f5
UserParameter=haproxy.stat.status[*],echo "show stat" | socat $1 stdio | grep "^$2,$3" | cut -d, -f18 | cut -d\  -f1
</file>
  * 新增 haproxy_discovery.sh <code sh>
vi /usr/local/bin/haproxy_discovery.sh</code><file>
#!/bin/bash
#
# Get list of Frontends and Backends from HAPROXY
# Example: ./haproxy_discovery.sh [/var/run/haproxy/info.sock] FRONTEND|BACKEND|SERVERS
# First argument is optional and should be used to set location of your HAPROXY socket
# Second argument is should be either FRONTEND, BACKEND or SERVERS, will default to FRONTEND if not set
#
# !! Make sure the user running this script has Read/Write permissions to that socket !!
#
## haproxy.cfg snippet
#  global
#  stats socket /run/haproxy/info.sock  mode 666 level user

#HAPROXY_SOCK="/var/run/haproxy/info.sock"
HAPROXY_SOCK="/var/lib/haproxy/stats"
[ -n "$1" ] && echo $1 | grep -q ^/ && HAPROXY_SOCK="$(echo $1 | tr -d '\040\011\012\015')"

get_stats() {
        echo "show stat" | socat ${HAPROXY_SOCK} stdio 2>/dev/null | grep -v "^#"
}

[ -n "$2" ] && shift 1
case $1 in
        B*) END="BACKEND" ;;
        F*) END="FRONTEND" ;;
        S*)
                for backend in $(get_stats | grep BACKEND | cut -d, -f1 | uniq); do
                        for server in $(get_stats | grep "${backend}" | grep -v BACKEND | cut -d, -f2); do
                                serverlist="$serverlist,"'{"{#BACKEND_NAME}":"'$backend'","{#SERVER_NAME}":"'$server'"}'
                        done
                done
                echo '{"data":['${serverlist#,}']}'
                exit 0
        ;;
        *) END="FRONTEND" ;;
esac

for frontend in $(get_stats | grep "$END" | cut -d, -f1 | uniq); do
    felist="$felist,"'{"{#'${END}'_NAME}":"'$frontend'"}'
done
echo '{"data":['${felist#,}']}'
</file><code sh>
chmod a+x /usr/local/bin/haproxy_discovery.sh
</code>
  * /usr/local/bin/haproxy_discovery.sh 依據實際狀況更改了原本 info.sock 定義
    *  /var/run/haproxy/info.sock -> /var/lib/haproxy/stats
  * 重起 zabbix-agent <code sh>
service zabbix-agent restart</code>
  * 測試<code sh>sudo zabbix_agentd -t haproxy.list.discovery[BACKEND]
</code><file>
haproxy.list.discovery[BACKEND]               [t|{"data":[{"{#BACKEND_NAME}":"stats-back"},{"{#BACKEND_NAME}":"pxc-back"},{"{#BACKEND_NAME}":"pxc-onenode-back"}]}]
</file>

===== @Zabbix Server 設定程序 =====
  * 至 https://github.com/anapsix/zabbix-haproxy/ 下載 [[https://raw.githubusercontent.com/anapsix/zabbix-haproxy/master/haproxy_zbx_template.xml|haproxy_zbx_template.xml]]
  * 將 haproxy_zbx_template.xml 匯入至 Zabbix Server → Configuration → Templates → Import

===== 參考網址 =====
  * http://blog.random.io/haproxy/

{{tag>haproxy zabbox}}