ansible+heartbeatV2构建高可用群集
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ansible+heartbeatV2构建高可用群集
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主機的ip地址分配
| hostname | IP address? | role? |
| master | 192.168.1.250/24 | ansible |
| node2.mictiger.com | 192.168.1.120/24 | heartbeat,httpd? |
| node3.mictiger.com | 192.168.1.130/24 | heartbeat,httpd? |
1）修改hostname
在node2和node3的/etc/hosts加入如下信息
192.168.1.120 node2.mictiger.com node2 192.168.1.130 node3.mictiger.com node32）建立master到node2，node3的節點互信
生成密鑰對
[root@master?~]#?ssh-keygen?-t?rsa?-P?''????生成一對密鑰 Generating?public/private?rsa?key?pair. Enter?file?in?which?to?save?the?key?(/root/.ssh/id_rsa):? Your?identification?has?been?saved?in?/root/.ssh/id_rsa. Your?public?key?has?been?saved?in?/root/.ssh/id_rsa.pub. The?key?fingerprint?is: dc:a5:7d:fc:ff:42:8c:8a:55:38:73:87:35:9a:f5:6a?root@CentOS The?key's?randomart?p_w_picpath?is: +--[?RSA?2048]----+ |?????????????????| |??????????????+??| |???????????..*?o?| |???????.?.++*..?.| |????????S?o=.+o.?| |??????????.?..E.?| |?????????o?.?o??.| |????????.?.???.?.| |???????????????.+| +-----------------+將生成的公鑰傳到目標主機
[root@master?~]#?ssh-copy-id?-i?.ssh/id_rsa.pub?root@192.168.1.120 [root@master?~]#?ssh-copy-id?-i?.ssh/id_rsa.pub?root@192.168.1.130 [root@master?~]#?ssh-copy-id?-i?.ssh/id_rsa.pub?root@192.168.1.150在master上驗證是否與node2，node3建立互信成功
[root@master?~]#?ssh?192.168.1.130?'date';ssh?192.168.1.120?'date';date Tue?Nov?18?22:39:55?CST?2014 Tue?Nov?18?22:40:03?CST?2014 Tue?Nov?18?22:40:04?CST?20143）安裝配置ansible
[root@master?~]#?yum?install?ansible [root@master?~]#?vim?/etc/ansible/hosts???只需要配置這文件配置要管理的主機 [HA] 192.168.1.150 192.168.1.120 192.168.1.130 [web] 192.168.1.120 192.168.1.130 [master] 192.168.1.150驗證ansible是否配置成功
[root@master?~]#?ansible?all?-a?'date' 192.168.1.120?|?success?|?rc=0?>> Tue?Nov?18?13:40:21?CST?2014192.168.1.150?|?success?|?rc=0?>> Tue?Nov?18?13:40:21?CST?2014192.168.1.130?|?success?|?rc=0?>> Tue?Nov?18?13:40:21?CST?20144）利用ansible更新時間，高可用群集必須配置一樣的時間
[root@master?~]#?ansible?web?-a?'ntpdate??202.118.1.81' 192.168.1.130?|?success?|?rc=0?>> 18?Nov?22:50:54?ntpdate[21487]:?step?time?server?202.118.1.81?offset?1.531700?sec192.168.1.120?|?success?|?rc=0?>> 18?Nov?22:50:54?ntpdate[13616]:?adjust?time?server?202.118.1.81?offset?0.313219?sec 將時間更新寫入cron [root@master?~]#?ansible?all?-m?cron?-a?'name="sync?time"?minute="*/5"?job="/usr/sbin/ntpdate?202.118.1.81?&>?/dev/null"' 192.168.1.130?|?success?>>?{"changed":?true,?"jobs":?["sync?time"] }192.168.1.120?|?success?>>?{"changed":?true,?"jobs":?["sync?time"] }192.168.1.150?|?success?>>?{"changed":?true,?"jobs":?["sync?time"] }5) 安裝并配置httpd程序
[root@master~]#?ansible?web?-m?yum?-a?'name=httpd?state=present'[root@master?~]#?ansible?web?-a?'service?httpd?start' 192.168.1.130?|?success?|?rc=0?>> Starting?httpd:?[??OK??]httpd:?apr_sockaddr_info_get()?failed?for?CentOS httpd:?Could?not?reliably?determine?the?server's?fully?qualified?domain?name,?using?127.0.0.1?for?ServerName192.168.1.120?|?success?|?rc=0?>> Starting?httpd:?[??OK??]httpd:?Could?not?reliably?determine?the?server's?fully?qualified?domain?name,?using?localhost.localdomain?for?ServerName [root@master?~]#?touch?index.html [root@master?~]#?echo?heartbeatV2?>?index.html [root@master?~]#?scp?index.html?root@192.168.1.130:/var/www/html/ index.html???????????????????????????????????????????????????????????????????????????????????????????????????????????????????100%???16?????0.0KB/s???00:00?? [root@master?~]#?scp?index.html?root@192.168.1.120:/var/www/html/ index.html???????????????????????????????????????????????????????????????????????????????????????????????????????????????????100%???16?????0.0KB/s???00:00驗證httpd是否安裝成功
[root@master?~]#?ansible?master?-a?'curl??192.168.1.{120,130}' 192.168.1.150?|?success?|?rc=0?>> --_curl_--192.168.1.120 heartbeatV2 --_curl_--192.168.1.130 heartbeatV2 [1/2]:?192.168.1.120?-->?<stdout>%?Total????%?Received?%?Xferd??Average?Speed???Time????Time?????Time??CurrentDload??Upload???Total???Spent????Left??Speed0????16????0????16????0?????0???5072??????0?--:--:--?--:--:--?--:--:--??8000[2/2]:?192.168.1.130?-->?<stdout>0????16????0????16????0?????0??10349??????0?--:--:--?--:--:--?--:--:--?10349將httpd程序stop并不讓它開機自動啟動
[root@www?~]#?ansible?web?-a?'service?httpd?stop' 192.168.1.120?|?success?|?rc=0?>> Stopping?httpd:?[??OK??]192.168.1.130?|?success?|?rc=0?>> Stopping?httpd:?[??OK??][root@www?~]#?ansible?web?-a?'chkconfig?httpd?off' 192.168.1.120?|?success?|?rc=0?>>192.168.1.130?|?success?|?rc=0?>>6）安裝heatbeatV2需要處理依賴關系所以沒有用ansible
[root@node2?~]#??rpm?-ivh?heartbeat-2.1.4-12.el6.x86_64.rpm?heartbeat-gui-2.1.4-12.el6.x86_64.rpm?heartbeat-stonith-2.1.4-12.el6.x86_64.rpm?heartbeat-pils-2.1.4-12.el6.x86_64.rpm? Preparing...????????????????###########################################?[100%]1:heartbeat-pils?????????###########################################?[?25%]2:heartbeat-stonith??????###########################################?[?50%]3:heartbeat??????????????###########################################?[?75%]4:heartbeat-gui??????????###########################################?[100%]7）配置heartbeat
[root@node2?~]#?cp?/usr/share/doc/heartbeat-2.1.4/{authkeys,ha.cf}?/etc/ha.d/ 配置authkeys [root@node2?ha.d]#?openssl?rand?-hex?16????生成16的隨機數作為heartbeat傳遞心跳信息的驗證 701782e0e6872f444edd0bbb726871fb auth?2 #1?crc #2?sha1?HI! #3?md5?Hello! 2?sha1?701782e0e6872f444edd0bbb726871f? [root@CentOS?ha.d]#?chmod?600?authkeys????修改authkeys的權限不讓其他人訪問 配置heartbeat的主配置文件ha.cf大概配置如下信息（根據個人需求而定） logfile?/var/log/ha-log????????????日志文件位置 mcast?eth0?225.10.10.10?694?1?0????使用組播地址通告和端口 auto_failback?on???????????????????自動添加down了又重新上線的節點到群集 node????node2.mictiger.com?????????配置節點信息 node????node3.mictiger.comping?192.168.1.1???????????????????網關地址 配置haresources添加如下信息 node2.mictiger.com???????192.168.1.250/24/eth0?httpd????主節點和VIP綁定的網卡，管理的資源 復制node2?的配置信息到node3 [root@localhost?~]#?scp?-r?/etc/ha.d/*?root@192.168.1.130:/etc/ha.d/8）啟動heartbeat
[root@master?~]#?ansible?web?-a?'service?heartbeat?start' 192.168.1.130?|?success?|?rc=0?>> Starting?High-Availability?services:? Done.2014/11/18_23:36:19?INFO:??Resource?is?stopped192.168.1.120?|?success?|?rc=0?>> Starting?High-Availability?services:? Done.2014/11/18_23:36:19?INFO:??Resource?is?stopped查看heartbeat運行在哪個節點上
[root@master ~]# ansible web -a 'ifconfig eth0:0'
192.168.1.130 | success | rc=0 >>
eth0:0 ? ?Link encap:Ethernet ?HWaddr 00:0C:29:8F:A0:EF ?
? ? ? ? ? UP BROADCAST RUNNING MULTICAST ?MTU:1500 ?Metric:1
192.168.1.120 | success | rc=0 >>
eth0:0 ? ?Link encap:Ethernet ?HWaddr 00:0C:29:57:5C:BB ?
? ? ? ? ? inet addr:192.168.1.250 ?Bcast:192.168.1.255 ?Mask:255.255.255.0
? ? ? ? ? UP BROADCAST RUNNING MULTICAST ?MTU:1500 ?Metric:1
[root@master ~]# curl 192.168.1.250
heartbeatV2
關閉node2驗證是否能夠訪問驗證高可用性
[root@node2 ~]# service heartbeat stop
Stopping High-Availability services:?
Done.
轉載于:https://blog.51cto.com/mictiger/1579341
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