Haproxy+Heartbeat 高可用集群方案操作记录
之前详细介绍了haproxy的基础知识点, 下面记录下Haproxy+Heartbeat高可用web集群方案实现过程, 以加深理解.
架构草图如下:
1) 基本环境准备 (centos6.9系统)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
|
172.16.60.208(eth0) HA主节点(ha-master) haproxy,heartbeat 172.16.60.207(eth0) HA备节点(ha-slave) haproxy,heartbeat 172.16.60.229 VIP地址 172.16.60.204(eth0) 后端节点1(rs-204) nginx /tomcat 172.16.60.205(eth0) 后端节点2(rs-205) nginx /tomcat 1) 关闭防火墙和selinux (四台节点机都操作) [root@ha-master ~] # /etc/init.d/iptables stop [root@ha-master ~] # setenforce 0 [root@ha-master ~] # vim /etc/sysconfig/selinux SELINUX=disabled 2) 设置主机名和绑定hosts (两台HA节点机器都操作) 主节点操作 [root@ha-master ~] # hostname ha-master [root@ha-master ~] # vim /etc/sysconfig/network HOSTNAME=ha-master [root@ha-master ~] # vim /etc/hosts 172.16.60.208 ha-master 172.16.60.207 ha-slave 备节点操作 [root@ha-slave ~] # hostname ha-slave [root@ha-slave ~] # vim /etc/sysconfig/network HOSTNAME=ha-slave [root@ha-slave ~] # vim /etc/hosts 172.16.60.208 ha-master 172.16.60.207 ha-slave |
2) 安装后端两个realserver节点的web环境 (即172.16.60.204/205两台机器都要安装nginx)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
采用yum方式在两台realserver节点上安装nginx (先安装nginx的yum源) [root@rs-204 ~] # rpm -ivh http://nginx.org/packages/centos/6/noarch/RPMS/nginx-release-centos-6-0.el6.ngx.noarch.rpm [root@rs-204 ~] # yum install -y nginx rs-204的nginx配置 [root@rs-204 ~] # cd /etc/nginx/conf.d/ [root@rs-204 conf.d] # cat default.conf [root@rs-204 conf.d] # >/usr/share/nginx/html/index.html [root@rs-204 conf.d] # vim /usr/share/nginx/html/index.html this is test page of realserver01:172.16.60.204 [root@rs-204 conf.d] # /etc/init.d/nginx start Starting nginx: [ OK ] [root@rs-204 conf.d] # lsof -i:80 COMMAND PID USER FD TYPE DEVICE SIZE /OFF NODE NAME nginx 31944 root 6u IPv4 91208 0t0 TCP *:http (LISTEN) nginx 31945 nginx 6u IPv4 91208 0t0 TCP *:http (LISTEN) rs-205的nginx配置 [root@rs-205 src] # cd /etc/nginx/conf.d/ [root@rs-205 conf.d] # cat default.conf [root@rs-205 conf.d] # >/usr/share/nginx/html/index.html [root@rs-205 conf.d] # vim /usr/share/nginx/html/index.html this is test page of realserver02:172.16.60.205 [root@rs-205 conf.d] # /etc/init.d/nginx start Starting nginx: [ OK ] [root@rs-205 conf.d] # lsof -i:80 COMMAND PID USER FD TYPE DEVICE SIZE /OFF NODE NAME nginx 20839 root 6u IPv4 289527645 0t0 TCP *:http (LISTEN) nginx 20840 nginx 6u IPv4 289527645 0t0 TCP *:http (LISTEN) 访问http: //172 .16.60.204/, 访问结果为 "this is test page of realserver01:172.16.60.204" 访问http: //172 .16.60.205/, 访问结果为 "this is test page of realserver02:172.16.60.205" |
3) 安装配置Haproxy (两台HA节点机进行同样操作)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
1) 先安装haproxy [root@ha-master ~] # yum install gcc gcc-c++ make openssl-devel kernel-devel [root@ha-master ~] # cd /usr/local/src/ #下载haproxy软件到/usr/local/src目录下 [root@ha-master src] # ls haproxy-1.8.12.tar.gz haproxy-1.8.12. tar .gz [root@ha-master src] # tar -zvxf haproxy-1.8.12.tar.gz [root@ha-master src] # cd haproxy-1.8.12 [root@ha-master haproxy-1.8.12] # make TARGET=linux26 CPU=x86_64 PREFIX=/usr/local/haprpxy USE_OPENSSL=1 ADDLIB=-lz 参数说明: TARGET=linux26 #使用 uname -r 查看内核,如:2.6.32-642.el6.x86_64,此时该参数就为linux26 CPU=x86_64 #使用 uname -r 查看系统信息,如 x86_64 GNU/Linux,此时该参数就为 x86_64 PREFIX= /usr/local/haprpxy #haprpxy 安装路径 [root@ha-master haproxy-1.8.12] # ldd haproxy | grep ssl libssl.so.10 => /usr/lib64/libssl .so.10 (0x00000031d0400000) [root@ha-master haproxy-1.8.12] # make install PREFIX=/usr/local/haproxy [root@ha-master haproxy-1.8.12] # mkdir -p /usr/local/haproxy/conf [root@ha-master haproxy-1.8.12] # mkdir -p /etc/haproxy [root@ha-master haproxy-1.8.12] # cp /usr/local/src/haproxy-1.8.12/examples/option-http_proxy.cfg /usr/local/haproxy/conf/haproxy.cfg [root@ha-master haproxy-1.8.12] # ln -s /usr/local/haproxy/conf/haproxy.cfg /etc/haproxy/haproxy.cfg [root@ha-master haproxy-1.8.12] # cp -r /usr/local/src/haproxy-1.8.12/examples/errorfiles /usr/local/haproxy/errorfiles [root@ha-master haproxy-1.8.12] # ln -s /usr/local/haproxy/errorfiles /etc/haproxy/errorfiles [root@ha-master haproxy-1.8.12] # mkdir -p /usr/local/haproxy/log [root@ha-master haproxy-1.8.12] # touch /usr/local/haproxy/log/haproxy.log [root@ha-master haproxy-1.8.12] # ln -s /usr/local/haproxy/log/haproxy.log /var/log/haproxy.log [root@ha-master haproxy-1.8.12] # cp /usr/local/src/haproxy-1.8.12/examples/haproxy.init /etc/rc.d/init.d/haproxy [root@ha-master haproxy-1.8.12] # chmod +x /etc/rc.d/init.d/haproxy [root@ha-master haproxy-1.8.12] # chkconfig haproxy on [root@ha-master haproxy-1.8.12] # ln -s /usr/local/haproxy/sbin/haproxy /usr/sbin 2) haroxy.cfg文件进行负载配置 [root@ha-master haproxy-1.8.12] # cd /usr/local/haproxy/conf/ [root@ha-master conf] # cp haproxy.cfg haproxy.cfg.bak [root@ha-master conf] # > haproxy.cfg [root@ha-master conf] # vim haproxy.cfg global log 127.0.0.1 local3 info maxconn 65535 chroot /usr/local/haproxy uid 99 gid 99 daemon defaults log global mode http retries 3 option redispatch stats uri /haproxy stats refresh 30s stats realm haproxy-status stats auth admin:dxInCtFianKtL]36 stats hide-version maxconn 65535 timeout connect 5000 timeout client 50000 timeout server 50000 frontend http- in mode http maxconn 65535 bind :80 log global option httplog option httpclose acl is_01 hdr_beg(host) www.kevin.com use_backend web-server if is_01 backend web-server mode http balance roundrobin cookie SERVERID insert indirect nocache option httpclose option forwardfor server web01 172.16.60.204:80 weight 1 cookie 3 check inter 2000 rise 2 fall 5 server web02 172.16.60.205:80 weight 1 cookie 4 check inter 2000 rise 2 fall 5 3) 配置HAProxy日志 [root@ha-master conf] # vim /etc/rsyslog.conf ....... $ModLoad imudp #取消注释 ,这一行不注释,日志就不会写 $UDPServerRun 514 #取消注释 ,这一行不注释,日志就不会写 ....... local3.* /var/log/haproxy .log #这一行必须要写,因为在haproxy.cfg里global全局定义好的日志级别 [root@ha-master conf] # vim /etc/sysconfig/rsyslog SYSLOGD_OPTIONS= "-r -m 0" #接收远程服务器日志 重启syslog日志服务 [root@ha-master conf] # service rsyslog restart Shutting down system logger: [ OK ] Starting system logger: [ OK ] 4) 设置haproxy负载均衡的最大并发连接数 查看内核 [root@ha-master conf] # sysctl -a | grep file fs. file -nr = 992 0 386459 fs. file -max = 386459 查看应用层面的需求 [root@ha-master conf] # cat /usr/local/haproxy/conf/haproxy.cfg global #全局参数设置 maxconn 65535 #设置最大连接数 更改系统层面 [root@ha-master conf] # vim /etc/security/limits.conf #最后一行增加 * - nofile 65535 5) 重启两台HA机器的haproxy [root@ha-master conf] # /etc/init.d/haproxy start Starting haproxy: [ OK ] [root@ha-master conf] # ps -ef|grep haproxy nobody 13080 1 0 16:43 ? 00:00:00 /usr/sbin/haproxy -D -f /etc/haproxy/haproxy .cfg -p /var/run/haproxy .pid root 13083 11940 0 16:43 pts /0 00:00:00 grep haproxy [root@ha-master conf] # lsof -i:80 COMMAND PID USER FD TYPE DEVICE SIZE /OFF NODE NAME haproxy 13080 nobody 4u IPv4 428975 0t0 TCP *:http (LISTEN) 将www.kevin.com域名解析到两个HA节点上, 即172.16.60.208 和 172.16.60.207上 接着访问http: //www .kevin.com/, 则发现访问结果是 "this is test page of realserver01:172.16.60.204" , 不断刷新, 访问结果也是这个. 只有当172.16.60.204这个节点的nginx挂了, 访问结果才变成 "this is test page of realserver02:172.16.60.205" , 即请求转发到正常的realserver节点上. 从haproxy.cfg文件中可以看出, 虽然配置了 "balance roundrobin" 这个选项, 即客户端每一次访问, 都跳转到后端不同的服务器上. 但是并没有生效! 因为又配置了 "cookie SERVERID insert indirect nocache" , 即保持客户端session会话同步的配置, 所以客户端请求会一直转发到同一个realserver节点上,直至 这个节点发生故障才会转发到另外正常的节点上. 把 "cookie SERVERID insert indirect nocache" 这个配置去掉或注释掉, 再次访问http: //www .kevin.com/, 就会发现每刷新一次, 请求都会转发到不同的realserver 节点上, 即 "balance roundrobin" 配置生效! 访问http: //www .kevin.com /haproxy , 输入haproxy.cfg文件中配置的用户名和密码admin:dxInCtFianKtL]36, 即可打开haproxy监控页面 |
从上图可以看出, 此时监控的后端两个realserver节点的服务都是OK的(配置文件中定义的web01和web02此时都是绿色状态)。 现在尝试关闭rs-205的nginx服务, 刷新http://www.kevin.com/haproxy监控页面, 发现web02变成红色,即此时该节点服务是故障状态!然后重启rs-205的nginx服务,再次刷出监控页面, 发现web02就又恢复到正常的绿色状态了!
4) 安装配置Heartbeat (两台HA节点机进行同样操作)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
1) 首先安装heartbeat (HA主备两个节点都要同样操作) 下载epel-release-latest-6.noarch.rpm [root@ha-master ~] # ll epel-release-latest-6.noarch.rpm -rw-rw-r-- 1 root root 14540 Nov 5 2012 epel-release-latest-6.noarch.rpm [root@ha-master ~] # yum install -y epel-release [root@ha-master ~] # rpm -ivh epel-release-latest-6.noarch.rpm --force [root@ha-master ~] # yum install -y heartbeat* libnet 2) 配置heartbeat (HA主备两个节点都要操作) 安装完heartbeat后系统会生成一个 /etc/ha .d/目录,此目录用于存放heartbeat的有关配置文件。 Heartbeat自带配置文件的注释信息较多,在此手工编写有关配置文件,heartbeat常用配置文件有四个,分别是: ha.cf:heartbeat主配置文件 haresources:本地资源文件 authkeys:认证文件 [root@ha-master ~] # cd /usr/share/doc/heartbeat-3.0.4/ [root@ha-master heartbeat-3.0.4] # cp authkeys ha.cf haresources /etc/ha.d/ [root@ha-master heartbeat-3.0.4] # cd /etc/ha.d/ [root@ha-master ha.d] # ll total 56 -rw-r--r-- 1 root root 645 Dec 24 21:37 authkeys -rw-r--r-- 1 root root 10502 Dec 24 21:37 ha.cf -rwxr-xr-x 1 root root 745 Dec 3 2013 harc -rw-r--r-- 1 root root 5905 Dec 24 21:37 haresources drwxr-xr-x 2 root root 4096 Dec 24 21:28 rc.d -rw-r--r-- 1 root root 692 Dec 3 2013 README.config drwxr-xr-x 2 root root 4096 Dec 24 21:28 resource.d -rw-r--r-- 1 root root 2082 Mar 24 2017 shellfuncs 3) 配置heartbeat的主配置文件ha.cf (HA主备节点配置一样) [root@ha-master ha.d] # pwd /etc/ha .d [root@ha-master ha.d] # cp ha.cf ha.cf.bak [root@ha-master ha.d] # > ha.cf [root@ha-master ha.d] # vim ha.cf debugfile /var/log/ha-debug logfile /var/log/ha-log #日志存放位置 #crm yes #是否开启集群资源管理功能 logfacility local0 #记录日志等级 keepalive 2 #心跳的时间间隔,默认时间单位为秒 deadtime 5 #超出该时间间隔未收到对方节点的心跳,则认为对方已经死亡。 warntime 3 #超出该时间间隔未收到对方节点的心跳,则发出警告并记录到日志中,但此时不会切换 initdead 10 #在某些系统上,系统启动或重启之后需要经过一段时间网络才能正常工作,该选项用于解决这种情况产生的时间间隔。取值至少为deadtime的两倍。 udpport 694 #设置广播通信使用的端口,694为默认使用的端口号。 bcast eth0 # Linux指定心跳使用以太网广播方式,并在eth0上进行广播。"#"后的要完全删除,要不然要出错。 ucast eth0 172.16.60.207 #采用网卡eth0的UDP多播来组织心跳,后面跟的IP地址应该为双机中对方的IP地址!!!!! auto_failback on #在该选项设为on的情况下,一旦主节点恢复运行,则自动获取资源并取代备用节点。off主节点恢复后变为备用节点,备用为主节点!!!!! #stonith_host * baytech 10.0.0.3 mylogin mysecretpassword #stonith_host ken3 rps10 /dev/ttyS1 kathy 0 #stonith_host kathy rps10 /dev/ttyS1 ken3 0 #watchdog /dev/watchdog node ha-master #主机节点名,可通过"uname -n"查看,默认为主节点!!!!! node ha-slave #备用机节点名,默认为次节点,要注意顺序!!!! #ping 172.16.60.207 # 选择ping节点,选择固定路由作为节点。ping节点仅用来测试网络连接。一般选择这行ping测试就行, 下面一行注释掉. ping_group group1 172.16.60.204 172.16.60.205 #这个地址并不是双机中的两个节点地址,而是仅仅用来测试网络的连通性. 当这两个IP 都不能ping通时,对方即开始接管资源。 respawn root /usr/lib64/heartbeat/ipfail #选配项。其中rootr表示启动ipfail进程的身份。要确保/usr/lib64/heartbeat/ipfail这个路径正确(可以用find命令搜索出来), 否则heartbeat启动失败 apiauth ipfail gid=root uid=root ============================温馨提示================================ HA备节点的ha.cf文件只需要将上面配置中的ucast一行内容改为 "ucast eth0 172.16.60.208" 即可, 其他配置内容和上面HA主节点的ha.cf完全一样! 4) 配置heartbeat的认证文件authkeys (HA主备节点配置必须一致) [root@ha-master ~] # cd /etc/ha.d/ [root@ha-master ha.d] # cp authkeys authkeys.bak [root@ha-master ha.d] # >authkeys auth 3 #auth后面指定的数字,下一行必须作为关键字再次出现! 一共有"1", "2","3" 三行, 这里选择"3"关键字, 选择"1"和"2"关键字也行, HA主备节点必须一致! #1 crc #2 sha1 HI! 3 md5 Hello! 必须将该文件授权为600 [root@ha-master ha.d] # chmod 600 authkeys [root@ha-master ha.d] # ll authkeys -rw------- 1 root root 20 Dec 25 00:16 authkeys 5) 修改heartbeat的资源文件haresources (HA主备节点配置必须完全一致) [root@ha-slave ha.d] # cp haresources haresources.bak [root@ha-slave ha.d] # >haresources [root@ha-slave ha.d] # vim haresources # 在文件结尾添加下面一行内容. 由于该文件默认全是注释,可以先清空该文件, 然后添加下面这一行内容 ha-master IPaddr::172.16.60.229 /24/eth0 haproxy 配置说明: 上面设置ha-maser为主节点, 集群VIP为172.16.60.229, haproxy为所指定需要监视的应用服务. 这样启动heartbeat服务的时候, 会自动启动haproxy服务. 启动两个HA节点的heartbeat服务 [root@ha-master ~] # /etc/init.d/heartbeat start /etc/init .d /heartbeat : line 55: /etc/ha .d /shellfuncs : No such file or directory 发现启动heartbeat服务会有如上报错! 这是因为没有装ClusterLabs-resource-agents导致的, 解决办法: 下载安装ClusterLabs-resource-agents中间件 下载地址: http: //linux-ha .org /wiki/Downloads 百度下载地址:https: //pan .baidu.com /s/1VNxpl0fUEQstVaPwE_KVbg 提取密码:wtiy [root@ha-master src] # pwd /usr/local/src [root@ha-master src] # ll resource-agents-3.9.6.tar.gz -rw-rw-r-- 1 root root 617790 Jan 2 12:37 resource-agents-3.9.6. tar .gz [root@ha-master src] # tar -zvxf resource-agents-3.9.6.tar.gz [root@ha-master src] # cd resource-agents-3.9.6 [root@ha-master resource-agents-3.9.6] # ./autogen.sh [root@ha-master resource-agents-3.9.6] # ./configure [root@ha-master resource-agents-3.9.6] # make && make install 查看下shellfuncs是否存在了 (实验时发现上面的插件 make 编译失败了, 但是shellfuncs文件也可以产生,只要产生这个文件就行了) [root@ha-master resource-agents-3.9.6] # find / -name shellfuncs /etc/ha .d /shellfuncs /usr/local/src/resource-agents-3 .9.6 /heartbeat/shellfuncs 启动两个HA节点的heartbeat服务 [root@ha-master ~] # /etc/init.d/heartbeat start Starting High-Availability services: INFO: Resource is stopped Done. [root@ha-master ~] # ps -ef|grep heartbeat root 25862 1 0 12:51 ? 00:00:00 heartbeat: master control process root 25865 25862 0 12:51 ? 00:00:00 heartbeat: FIFO reader root 25866 25862 0 12:51 ? 00:00:00 heartbeat: write: bcast eth0 root 25867 25862 0 12:51 ? 00:00:00 heartbeat: read : bcast eth0 root 25868 25862 0 12:51 ? 00:00:00 heartbeat: write: ucast eth0 root 25869 25862 0 12:51 ? 00:00:00 heartbeat: read : ucast eth0 root 25870 25862 0 12:51 ? 00:00:00 heartbeat: write: ping_group group1 root 25871 25862 0 12:51 ? 00:00:00 heartbeat: read : ping_group group1 root 25891 25862 0 12:51 ? 00:00:00 /usr/lib64/heartbeat/ipfail root 26089 1 0 12:51 ? 00:00:00 /bin/sh /usr/lib/ocf/resource .d //heartbeat/IPaddr start root 26090 26089 0 12:51 ? 00:00:00 /usr/libexec/heartbeat/send_arp -i 500 -r 10 -p /var/run/resource-agents/send_arp-172 .16.60.229 eth0 172.16.60.229 auto 172.16.60.229 ffffffffffff root 26153 18919 0 12:51 pts /0 00:00:00 grep heartbeat [root@ha-master ~] # lsof -i:694 COMMAND PID USER FD TYPE DEVICE SIZE /OFF NODE NAME heartbeat 25866 root 7u IPv4 572995 0t0 UDP *:ha-cluster heartbeat 25867 root 7u IPv4 572995 0t0 UDP *:ha-cluster heartbeat 25868 root 7u IPv4 573001 0t0 UDP *:ha-cluster heartbeat 25869 root 7u IPv4 573001 0t0 UDP *:ha-cluster |
5) HA高可用故障切换测试
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
1) 当HA主节点的heartbeat服务启动后, 会发现主节点的haproxy服务也会被自带启动起来的! 这是因为在 /etc/ha .d /haresources 文件里配置了haproxy服务的监控了,主节点此时占有vip资源,即接管服务! [root@ha-master ~] # /etc/init.d/heartbeat start Starting High-Availability services: INFO: Resource is stopped Done. [root@ha-master ~] # ps -ef|grep heartbeat root 23215 1 0 14:11 ? 00:00:00 heartbeat: master control process root 23218 23215 0 14:11 ? 00:00:00 heartbeat: FIFO reader root 23219 23215 0 14:11 ? 00:00:00 heartbeat: write: bcast eth0 root 23220 23215 0 14:11 ? 00:00:00 heartbeat: read : bcast eth0 root 23221 23215 0 14:11 ? 00:00:00 heartbeat: write: ucast eth0 root 23222 23215 0 14:11 ? 00:00:00 heartbeat: read : ucast eth0 root 23223 23215 0 14:11 ? 00:00:00 heartbeat: write: ping_group group1 root 23224 23215 0 14:11 ? 00:00:00 heartbeat: read : ping_group group1 root 23246 10014 0 14:11 pts /1 00:00:00 grep heartbeat [root@ha-master ~] # lsof -i:694 COMMAND PID USER FD TYPE DEVICE SIZE /OFF NODE NAME heartbeat 23219 root 7u IPv4 391522 0t0 UDP *:ha-cluster heartbeat 23220 root 7u IPv4 391522 0t0 UDP *:ha-cluster heartbeat 23221 root 7u IPv4 391528 0t0 UDP *:ha-cluster heartbeat 23222 root 7u IPv4 391528 0t0 UDP *:ha-cluster [root@ha-master ~] # ps -ef|grep haproxy nobody 26150 1 0 12:51 ? 00:00:00 /usr/sbin/haproxy -D -f /etc/haproxy/haproxy .cfg -p /var/run/haproxy .pid root 26178 18919 0 12:54 pts /0 00:00:00 grep haproxy 此时vip资源也在HA主节点上 [root@ha-master ~] # ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link /loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1 /8 scope host lo inet6 ::1 /128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 link /ether 00:50:56:ac:5b:56 brd ff:ff:ff:ff:ff:ff inet 172.16.60.208 /24 brd 172.16.60.255 scope global eth0 inet 172.16.60.229 /24 brd 172.16.60.255 scope global secondary eth0:0 inet6 fe80::250:56ff:feac:5b56 /64 scope link valid_lft forever preferred_lft forever 但是HA备节点的heartbeat服务启动后, 备节点的haproxy服务并没有被自带启动! 因为此时vip在HA主节点那边,备节点此时没有接管服务。 [root@ha-slave ~] # /etc/init.d/heartbeat start Starting High-Availability services: INFO: Resource is stopped Done. [root@ha-slave ~] # ps -ef|grep haproxy root 23250 10014 0 14:12 pts /1 00:00:00 grep haproxy [root@ha-slave ~] # ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link /loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1 /8 scope host lo inet6 ::1 /128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 link /ether 00:50:56:ac:05:b5 brd ff:ff:ff:ff:ff:ff inet 172.16.60.207 /24 brd 172.16.60.255 scope global eth0 inet6 fe80::250:56ff:feac:5b5 /64 scope link valid_lft forever preferred_lft forever 2) 关闭HA主节点的heartbeat服务, 会发现主节点的haproxy服务也会被自动关闭,并且VIP资源也被转移到HA备节点上。 HA备节点自动接管VIP资源,且haproxy服务也自动起来。 [root@ha-master ~] # /etc/init.d/heartbeat stop #必须这种方式关闭heartbeat服务, 才会自动haproxy服务, 实现VIP资源的转移 Stopping High-Availability services: Done. [root@ha-master ~] # ps -ef|grep heartbeat root 28094 18919 0 14:16 pts /0 00:00:00 grep heartbeat [root@ha-master ~] # lsof -i:694 [root@ha-master ~] # ps -ef|grep haproxy root 28097 18919 0 14:16 pts /0 00:00:00 grep haproxy [root@ha-master ~] # ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link /loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1 /8 scope host lo inet6 ::1 /128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 link /ether 00:50:56:ac:5b:56 brd ff:ff:ff:ff:ff:ff inet 172.16.60.208 /24 brd 172.16.60.255 scope global eth0 inet6 fe80::250:56ff:feac:5b56 /64 scope link valid_lft forever preferred_lft forever HA备份节点接管VIP资源,接管服务 [root@ha-slave ~] # ps -ef|grep haproxy nobody 24197 1 0 14:16 ? 00:00:00 /usr/sbin/haproxy -D -f /etc/haproxy/haproxy .cfg -p /var/run/haproxy .pid root 24217 10014 0 14:17 pts /1 00:00:00 grep haproxy [root@ha-slave ~] # ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link /loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1 /8 scope host lo inet6 ::1 /128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 link /ether 00:50:56:ac:05:b5 brd ff:ff:ff:ff:ff:ff inet 172.16.60.207 /24 brd 172.16.60.255 scope global eth0 inet 172.16.60.229 /24 brd 172.16.60.255 scope global secondary eth0 inet6 fe80::250:56ff:feac:5b5 /64 scope link valid_lft forever preferred_lft forever 3) 当HA主节点的heartbeat服务重新启动后,VIP资源就会再次被抢回来, 因为在ha.cf文件里配置了 "auto_failback on" [root@ha-master ~] # /etc/init.d/heartbeat start Starting High-Availability services: INFO: Resource is stopped Done. [root@ha-master ~] # ps -ef|grep haproxy nobody 28490 1 0 14:19 ? 00:00:00 /usr/sbin/haproxy -D -f /etc/haproxy/haproxy .cfg -p /var/run/haproxy .pid root 28493 18919 0 14:19 pts /0 00:00:00 grep haproxy [root@ha-master ~] # ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link /loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1 /8 scope host lo inet6 ::1 /128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 link /ether 00:50:56:ac:5b:56 brd ff:ff:ff:ff:ff:ff inet 172.16.60.208 /24 brd 172.16.60.255 scope global eth0 inet 172.16.60.229 /24 brd 172.16.60.255 scope global secondary eth0:0 inet6 fe80::250:56ff:feac:5b56 /64 scope link valid_lft forever preferred_lft forever HA备份节点失去VIP资源,haproxy服务也被自动关闭 [root@ha-slave ~] # ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link /loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1 /8 scope host lo inet6 ::1 /128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 link /ether 00:50:56:ac:05:b5 brd ff:ff:ff:ff:ff:ff inet 172.16.60.207 /24 brd 172.16.60.255 scope global eth0 inet6 fe80::250:56ff:feac:5b5 /64 scope link valid_lft forever preferred_lft forever [root@ha-slave ~] # ps -ef|grep haproxy root 24460 10014 0 14:20 pts /1 00:00:00 grep haproxy heartbeat的日志为 /var/log/ha-log , 在HA主从节点故障发生VIP资源转移过程中可以观察ha-log日志信息 将www.kevin.com解析地址调整到vip地址172.16.60.229, 在故障转移过程中, 不会前面客户端的访问情况,基本是无感知的! 以上就实现了heartbeat+haproxy故障转移的高可用环境~ |
***************当你发现自己的才华撑不起野心时,就请安静下来学习吧***************
热爱世间万物,无最爱,无例外、