HaProxy+Keepalived+Mycat高可用群集配置

b5qin4sn56 8年前發布 | 51K 次閱讀集群/負載均衡 keepalived HAproxy

來自： http://www.cnblogs.com/chenmh/p/5194636.html

本章節主要介紹配置HaProxy+Keepalived高可用群集，Mycat的配置就不在這里做介紹，可以參考我前面寫的幾篇關于Mycat的文章。

部署圖：

HaProxy安裝

181和179兩臺服務器安裝haproxy的步驟一致

--創建haproxy用戶
useradd haproxy

--解壓完后進入haproxy目錄
cd haproxy-1.4.25/

--編譯安裝
make TARGET=linux26 PREFIX=/usr/local/haproxy ARCH=x86_64

make install PREFIX=/usr/local/haproxy

HaProxy配置

cd /usr/local/haproxy

touch haproxy.cfg

vim haproxy.cfg

 global
    log 127.0.0.1   local0  ##記日志的功能
    maxconn 4096
    chroot /usr/local/haproxy
    user haproxy
    group haproxy
    daemon
defaults
log global
option dontlognull
retries 3
option redispatch
maxconn 2000
contimeout 5000
clitimeout 50000
srvtimeout 50000
listen  admin_stats 192.168.57.180:48800 
      stats uri /admin-status        ##統計頁面
      stats auth  admin:admin
      mode    http
      option  httplog
listen allmycat_service 192.168.57.180:8098
      mode tcp
      option tcplog
  option httpchk OPTIONS * HTTP/1.1\r\nHost:\ www
      balance roundrobin
  server mycat_181 192.168.57.181:8066 check port 48700 inter 5s rise 2 fall 3
  server mycat_179 192.168.57.179:8066 check port 48700 inter 5s rise 2 fall 3
      srvtimeout 20000

配置haproxy記錄日志功能

yum –y install rsyslog

mkdir /etc/rsyslog.d

cd /etc/rsyslog.d/

touch haproxy.conf

vim haproxy.conf

$ModLoad imudp
$UDPServerRun 514
local0.* /var/log/haproxy.log

vim /etc/rsyslog.conf

在#### RULES #### 上面一行加入以下內容

# Include all config files in /etc/rsyslog.d/
$IncludeConfig /etc/rsyslog.d/*.conf

在local7.* /var/log/boot.log下面加入以下內容

local0.* /var/log/haproxy.log

重啟rsyslog服務

service rsyslog restart

將rsyslog加入自動啟動服務

chkconfig --add rsyslog
chkconfig --level 2345 rsyslog on

配置監聽mycat是否存活

安裝xinetd插件

yum install xinetd -y

cd /etc/xinetd.d

touch mycat_status

vim mycat_status

service mycat_status
{
flags = REUSE
socket_type = stream
port = 48700
wait = no
user = nobody
server =/usr/local/bin/mycat_status
log_on_failure += USERID
disable = no
}

創建xinetd啟動服務腳本

vim /usr/local/bin/mycat_status

#!/bin/bash
#/usr/local/bin/mycat_status.sh
# This script checks if a mycat server is healthy running on localhost. It will
# return:
#
# "HTTP/1.x 200 OK\r" (if mycat is running smoothly)
#
# "HTTP/1.x 503 Internal Server Error\r" (else)
mycat=`/usr/local/mycat/bin/mycat status |grep 'not running'| wc -l`
if [ "$mycat" = "0" ];
then
/bin/echo -e "HTTP/1.1 200 OK\r\n"
else
/bin/echo -e "HTTP/1.1 503 Service Unavailable\r\n"
fi

修改腳本文件權限

我就是在這里被坑了很久,根據權威指南上面mycat_status這個腳本里面的內容也有很多問題，好幾個地方沒有空格.

chmod 777 /usr/local/bin/mycat_status
chmod 777 /etc/xinetd.d/mycat_status

將啟動腳本加入服務

vim /etc/services

在末尾加入

mycat_status 48700/tcp # mycat_status

重啟xinetd服務

service xinetd restart

將xinetd加入自啟動服務

chkconfig --add xinetd
chkconfig --level 2345 xinetd on

頁面測試

http://192.168.57.180:48800/admin-status

由于179還沒有安裝好，所以這里179顯示連接失敗

創建haproxy啟停腳本

啟動腳本

touch /usr/local/haproxy/sbin/start
chmod +x /usr/local/haproxy/sbin/start
vim  /usr/local/haproxy/sbin/start

#!/bin/sh
/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg &

關閉腳本

touch /usr/local/haproxy/sbin/stop
chmod +x /usr/local/haproxy/sbin/stop
vim /usr/local/haproxy/sbin/stop

#!/bin/sh
ps -ef | grep sbin/haproxy | grep -v grep |awk '{print $2}'|xargs kill -s 9

授權

chown -R haproxy.haproxy /usr/local/haproxy/*

Keepalived安裝步驟

keepalived的安裝步驟過程在兩臺服務器上除了keepalived.conf配置文件稍微有點區別外其他的地方都一致。

openssl安裝

./config --prefix=/usr/local/openssl
./config -t
make depend
make
make test
make install
ln -s /usr/local/openssl /usr/local/ssl

vim /etc/ld.so.conf

在文件末尾加入以下內容

/usr/local/openssl/lib

修改環境變量

vim /etc/profile

在文件末尾加入以下內容

export OPENSSL=/usr/local/openssl/bin
export PATH=$PATH:$OPENSSL

使環境變量立刻生效

source /etc/profile

安裝openssl-devel

yum install openssl-devel -y

測試

ldd /usr/local/openssl/bin/openssl

linux-vdso.so.1 => (0x00007fff996b9000)
libdl.so.2 =>/lib64/libdl.so.2 (0x00000030efc00000)
libc.so.6 =>/lib64/libc.so.6 (0x00000030f0000000)
/lib64/ld-linux-x86-64.so.2 (0x00000030ef800000)

which openssl

/usr/bin/openssl

openssl version

OpenSSL 1.0.0-fips 29 Mar 2010

keepalived安裝

./configure --prefix=/usr/local/keepalived
make
make install
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
mkdir /etc/keepalived
cd /etc/keepalived/
cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived
mkdir -p  /usr/local/keepalived/var/log

創建配置文件和腳本

mkdir /etc/keepalived/scripts

cd /etc/keepalived/scripts

vim /etc/keepalived/keepalived.conf

master

! Configuration Fileforkeepalived
vrrp_script chk_http_port {
script"/etc/keepalived/scripts/check_haproxy.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state MASTER #192.168.57.179上改為BACKUP
interface eth0 #對外提供服務的網絡接口
virtual_router_id 51 #VRRP組名，兩個節點的設置必須一樣，以指明各個節點屬于同一VRRP組
priority 150 #數值愈大，優先級越高,backup上改為120
advert_int 1 #同步通知間隔
authentication { #包含驗證類型和驗證密碼。類型主要有PASS、AH兩種，通常使用的類型為PASS，據說AH使用時有問題
auth_type PASS
auth_pass 1111
}
track_script {
chk_http_port #調用腳本check_haproxy.sh檢查haproxy是否存活
}
virtual_ipaddress { #vip地址，這個ip必須與我們在lvs客戶端設定的vip相一致
192.168.57.180 dev eth0 scope global
}
notify_master /etc/keepalived/scripts/haproxy_master.sh
notify_backup /etc/keepalived/scripts/haproxy_backup.sh
notify_fault /etc/keepalived/scripts/haproxy_fault.sh
notify_stop /etc/keepalived/scripts/haproxy_stop.sh
}

backup

! Configuration Fileforkeepalived
vrrp_script chk_http_port {
script"/etc/keepalived/scripts/check_haproxy.sh"
interval 2
weight 2
}
vrrp_instance VI_1 {
state BACKUP #192.168.57.179上改為BACKUP
interface eth0 #對外提供服務的網絡接口
virtual_router_id 51 #VRRP組名，兩個節點的設置必須一樣，以指明各個節點屬于同一VRRP組
priority 120 #數值愈大，優先級越高,backup上改為120
advert_int 1 #同步通知間隔
authentication { #包含驗證類型和驗證密碼。類型主要有PASS、AH兩種，通常使用的類型為PASS，據說AH使用時有問題
auth_type PASS
auth_pass 1111
}
track_script {
chk_http_port #調用腳本check_haproxy.sh檢查haproxy是否存活
}
virtual_ipaddress { #vip地址，這個ip必須與我們在lvs客戶端設定的vip相一致
192.168.57.180 dev eth0 scope global
}
notify_master /etc/keepalived/scripts/haproxy_master.sh
notify_backup /etc/keepalived/scripts/haproxy_backup.sh
notify_fault /etc/keepalived/scripts/haproxy_fault.sh
notify_stop /etc/keepalived/scripts/haproxy_stop.sh
}

vim /etc/keepalived/scripts/check_haproxy.sh

#!/bin/bash
STARTHAPROXY="/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg"
STOPKEEPALIVED="/etc/init.d/keepalived stop"
LOGFILE="/usr/local/keepalived/var/log/keepalived-haproxy-state.log"
echo "[check_haproxy status]" >> $LOGFILE
A=`ps -C haproxy --no-header |wc -l`
echo "[check_haproxy status]" >> $LOGFILE
date >> $LOGFILE
if [ $A -eq 0 ];then
echo $STARTHAPROXY >> $LOGFILE
$STARTHAPROXY >> $LOGFILE 2>&1
sleep 5
fi
if [ `ps -C haproxy --no-header |wc -l` -eq 0 ];then
exit 0
else
exit 1
fi

vim /etc/keepalived/scripts/haproxy_master.sh

#!/bin/bash
STARTHAPROXY=`/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg`
STOPHAPROXY=`ps -ef | grep sbin/haproxy | grep -v grep | awk '{print $2}'| xargs kill -s 9`
LOGFILE="/usr/local/keepalived/var/log/keepalived-haproxy-state.log"
echo "[master]" >> $LOGFILE
date >> $LOGFILE
echo "Being master...." >> $LOGFILE 2>&1
echo "stop haproxy...." >> $LOGFILE 2>&1
$STOPHAPROXY >> $LOGFILE 2>&1
echo "start haproxy...." >> $LOGFILE 2>&1
$STARTHAPROXY >> $LOGFILE 2>&1
echo "haproxy stared ..." >> $LOGFILE

vim /etc/keepalived/scripts/haproxy_backup.sh

#!/bin/bash
STARTHAPROXY=`/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/haproxy.cfg`
STOPHAPROXY=`ps -ef | grep sbin/haproxy | grep -v grep | awk '{print $2}'| xargs kill -s 9`
LOGFILE="/usr/local/keepalived/var/log/keepalived-haproxy-state.log"
echo "[backup]" >> $LOGFILE
date >> $LOGFILE
echo "Being backup...." >> $LOGFILE 2>&1
echo "stop haproxy...." >> $LOGFILE 2>&1
$STOPHAPROXY >> $LOGFILE 2>&1
echo "start haproxy...." >> $LOGFILE 2>&1
$STARTHAPROXY >> $LOGFILE 2>&1
echo "haproxy stared ..." >> $LOGFILE

vim /etc/keepalived/scripts/haproxy_fault.sh

#!/bin/bash
LOGFILE=/usr/local/keepalived/var/log/keepalived-haproxy-state.log
echo "[fault]" >> $LOGFILE
date >> $LOGFILE

vim /etc/keepalived/scripts/haproxy_stop.sh

#!/bin/bash
LOGFILE=/usr/local/keepalived/var/log/keepalived-haproxy-state.log
echo "[stop]" >> $LOGFILE
date >> $LOGFILE

賦予腳本可執行權限

chmod 777 /etc/keepalived/scripts/*

將keepalived加入自啟動服務

chkconfig --add keepalived
chkconfig --level 2345 keepalived on

--啟動服務
service keepalived start

權威指南上面代碼部分好多處都存在問題，幾乎每一塊代碼都存在問題，有時候往往一個空格需要花很長的時間去找這個問題，所以在代碼方面要細心；特別是復制別人的代碼不要原本照抄最好是檢查一下，除了代碼本身的問題權限有時候也是容易忽略的錯誤，特別是可執行文件要注意是否有可執行權限。

備注：

作者： pursuer.chen

博客： http://www.cnblogs.com/chenmh

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集群/負載均衡 keepalived HAproxy