heartbeat高可用
一、基本了解
1、Hearbeat和keepalived区别
Keepalived使用的vrrp协议方式,虚拟路由冗余协议 (Virtual Router Redundancy Protocol,简称VRRP);
Heartbeat是基于主机或网络的服务的高可用方式;
keepalived的目的是模拟路由器的双机
heartbeat的目的是用户service的双机
lvs的高可用建议用keepavlived
业务的高可用用heartbeat
heartbeat有主备模式,双主模式
2、heartbeat 主要配置文件
ha.cf 参数配置文件
authkey 认证文件
3haresource 资源配置文件,如配置ip资源及脚本程序
3、拓展:一个网卡接口配置两个ip
[root@slave ~]# cd /etc/sysconfig/network-scripts/
[root@slave network-scripts]# vim ifcfg-ens33:0
DEVICE=ens33:0
TYPE=Ethernet
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.40.222
NETMASK=255.255.255.0
GATEWAY=192.168.40.1
二、源码安装
1、搭建环境
#hostnamectl set-hostname master (132) ------> 192.168.40.221 (心跳线)
#hostnamectl set-hostname slave (211) -------> 192.168.40.220 (心跳线)
vip :192.168.40.222 (后续的操作,暂时列出来)
[root@master ~]# vim /etc/hosts
192.168.40.132 master
192.168.40.211 slave
关闭防火墙、selinux
yum安装nginx
2、源码安装(两台机子一样)
#yum install gcc gcc-c++ autoconf automake libtool glib2-devel libxml2-devel bzip2 bzip2-devel e2fsprogs-devel libxslt-devel libtool-ltdl-devel asciidoc
rz 上传源码包
安装glue
#tar xf 0a7add1d9996.tar.bz2
#cd Reusable-Cluster-Components-glue--0a7add1d9996/
./autogen.sh
./configure --prefix=/usr/local/heartbeat --with-daemon-user=hacluster --with-daemon-group=haclient --enable-fatal-warnings=no LIBS='/lib64/libuuid.so.1'
make && make install
echo $?
安装Resource Agents
tar xf v3.9.6.tar.gz
cd resource-agents-3.9.6/
./autogen.sh
./configure --prefix=/usr/local/heartbeat --with-daemon-user=hacluster --with-daemon-group=haclient --enable-fatal-warnings=no LIBS='/lib64/libuuid.so.1'
make && make install
echo $?
cd ..
安装HeartBeat
#tar xf 958e11be8686.tar.bz2
cd Heartbeat-3-0-958e11be8686/
./bootstrap
export CFLAGS="$CFLAGS -I/usr/local/heartbeat/include -L/usr/local/heartbeat/lib"
./configure --prefix=/usr/local/heartbeat --with-daemon-user=hacluster --with-daemon-group=haclient --enable-fatal-warnings=no LIBS='/lib64/libuuid.so.1'
make && make install
echo $?
配置网卡支持插件文件
#mkdir -pv /usr/local/heartbeat/usr/lib/ocf/lib/heartbeat/
#cp /usr/lib/ocf/lib/heartbeat/ocf-* /usr/local/heartbeat/usr/lib/ocf/lib/heartbeat/
注意:一般启动时会报错因为 ping和ucast这些配置都需要插件支持 需要将lib64下面的插件软连接到lib目录 才不会抛出异常
#ln -svf /usr/local/heartbeat/lib64/heartbeat/plugins/RAExec/* /usr/local/heartbeat/lib/heartbeat/plugins/RAExec/
#ln -svf /usr/local/heartbeat/lib64/heartbeat/plugins/* /usr/local/heartbeat/lib/heartbeat/plugins/
拷贝三个模版配置文件到 /usr/local/heartbeat/etc/ha.d 目录下
#cp /root/Heartbeat-3-0-958e11be8686/doc/{ha.cf,haresources,authkeys} /usr/local/heartbeat/etc/ha.d/
三、heartbeat配置文件
#vim /usr/local/heartbeat/etc/ha.d/ha.cf
- debugfile /var/log/ha-debug
- logfile /var/log/ha-log
- logfacility local0
- keepalive 2
- warntime 10
- deadtime 5
- initdead 120
- udpport 694
- ucast ens33 192.168.40.221 (对方的心跳线)
- auto_failback on
- node master
- node slave
- ping 192.168.0.1
#vim /usr/local/heartbeat/etc/ha.d/authkeys(主备一样)
auth 3
#1 crc
#2 sha1 HI!
3 md5 Hello!
#vim /usr/local/heartbeat/etc/ha.d/haresources (主备一样)
master IPaddr::192.168.40.222/24/ens33 (虚拟IP)
四、测试
1、[root@master ~]# echo web1 > /usr/share/nginx/html/index.html (修改主页文件,好区分,方法多样)
2、[root@master ~]# cat /usr/share/nginx/html/index.html
web2 (132机子)
3、[root@slave ~]# cat /usr/share/nginx/html/index.html
we1 (211机子)
4、虚拟ip访问(主机正常)
5、[root@master ~]# systemctl stop heartbeat (停掉master的heartbeat)
6、虚拟ip转移到从机
[root@slave ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:17:c0:db brd ff:ff:ff:ff:ff:ff
inet 192.168.40.211/24 brd 192.168.40.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.40.222/24 brd 192.168.40.255 scope global secondary ens33:0
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe17:c0db/64 scope link
valid_lft forever preferred_lft forever