部署mysql高可用、讀寫分離集羣
部署mysql高可用、讀寫分離集羣mysql
架構圖：c++
部署集羣：git
注意：
github
##Atlas要求mysql版本必須是5.1以上，這裏建議安裝mysql5.6 ##mysql5.6軟件下載地址： http://pan.baidu.com/s/1bnrzpZh
主master和備master安裝DRBD：
sql
http://732233048.blog.51cto.com/9323668/1665979 數據庫
主master和備master安裝heartbeat和mysql：
windows
http://732233048.blog.51cto.com/9323668/1670068 centos
slave1和slave2安裝mysql：
api
##mysql5.6採用cmake安裝 yum -y install make gcc gcc-c++ cmake bison-devel ncurses-devel kernel-devel readline-devel openssl-devel openssl zlib zlib-devel pcre-devel perl perl-devel #安裝依賴包 cd /usr/local/src/ tar -zxf mysql-5.6.22.tar.gz cd mysql-5.6.22 mkdir -p /data/mysql/data #數據目錄 cmake -DCMAKE_INSTALL_PREFIX=/usr/local/mysql -DMYSQL_DATADIR=/data/mysql/data -DSYSCONFDIR=/usr/local/mysql -DWITH_MYISAM_STORAGE_ENGINE=1 -DWITH_INNOBASE_STORAGE_ENGINE=1 -DWITH_MEMORY_STORAGE_ENGINE=1 -DWITH_PARTITION_STORAGE_ENGINE=1 -DMYSQL_UNIX_ADDR=/var/lib/mysql/mysql.sock -DDEFAULT_CHARSET=utf8 -DDEFAULT_COLLATION=utf8_general_ci -DEXTRA_CHARSETS:STRING=utf8,gbk -DWITH_DEBUG=0 make ##時間會好久 make install
groupadd mysql useradd -s /sbin/nologin -g mysql mysql /usr/local/mysql/scripts/mysql_install_db --basedir=/usr/local/mysql --datadir=/data/mysql/data --defaults-file=/usr/local/mysql/my.cnf --user=mysql chown -R mysql.mysql /data/mysql
##修改配置文件： mv /usr/local/mysql/my.cnf /usr/local/mysql/my.cnf.old vi /usr/local/mysql/my.cnf [mysqld] basedir = /usr/local/mysql datadir = /data/mysql/data port = 3306 socket = /var/lib/mysql/mysql.sock pid-file = /var/lib/mysql/mysql.pid default_storage_engine = InnoDB expire_logs_days = 14 max_binlog_size = 1G binlog_cache_size = 10M max_binlog_cache_size = 20M slow_query_log long_query_time = 2 slow_query_log_file = /data/mysql/logs/slowquery.log open_files_limit = 65535 innodb = FORCE innodb_buffer_pool_size = 4G innodb_log_file_size = 1G query_cache_size = 0 thread_cache_size = 64 table_definition_cache = 512 table_open_cache = 512 max_connections = 1000 sort_buffer_size = 10M max_allowed_packet = 6M sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES [mysqld_safe] log-error = /data/mysql/logs/error.log [client] socket = /var/lib/mysql/mysql.sock port = 3306 ##innodb_buffer_pool_size： 主要做用是緩存innodb表的索引，數據，插入數據時的緩衝； 默認值：128M； 專用mysql服務器設置此值的大小： 系統內存的70%-80%最佳。 若是你的系統內存不大，查看這個參數，把它的值設置小一點吧（若值設置大了，啓動會報錯）
##啓動mysql： cp -a /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld chkconfig --add mysqld chkconfig mysqld on /etc/init.d/mysqld start netstat -tlnp | grep mysql ##查看是否啓動 vi /etc/profile ##修改path路徑 ##在最後添加：export PATH=$PATH:/usr/local/mysql/bin source /etc/profile
##建立mysql密碼： mysqladmin -u root password "123456"
slave1和slave2配置主從複製：
緩存
##首先先確認哪臺master的drbd是primary狀態##
##主master： [root@dbm138 ~]# cat /proc/drbd | grep ro version: 8.3.16 (api:88/proto:86-97) 0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r----- ##138是primary
##備master： [root@dbm139 ~]# cat /proc/drbd | grep ro version: 8.3.16 (api:88/proto:86-97) 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r----- ##139是secondary
##由上確認：主master138的drbd目前是primary##
##主master： ##開啓二進制文件： vi /usr/local/mysql/my.cnf 在[mysqld]下添加： log-bin = /data/mysql/binlog/mysql-binlog ##二進制文件最好單獨放在一個目錄下 mkdir /data/mysql/binlog/ ##建立日誌目錄 chown -R mysql.mysql /data/mysql /etc/init.d/mysqld restart ##reload好像不可行
##slave1： vi /usr/local/mysql/my.cnf 在[mysqld]下添加： server-id = 2 /etc/init.d/mysqld restart ##必須是restart
##slave2： vi /usr/local/mysql/my.cnf 在[mysqld]下添加： server-id = 3 /etc/init.d/mysqld restart ##必須是restar
##主master： ##給每臺從庫建立一個數據庫帳號（受權） mysql -uroot -p123456 grant replication slave on *.* to 'slave'@'192.168.247.140' identified by '123456'; grant replication slave on *.* to 'slave'@'192.168.247.141' identified by '123456'; flush privileges;
##主master： ##備份數據： mysql -uroot -p123456 flush tables with read lock; #鎖表，只讀 show master status; #查看此時的binlog位置和pos值，這個要記錄下來 +---------------------+----------+--------------+------------------+-------------------+ | File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +---------------------+----------+--------------+------------------+-------------------+ | mysql-binlog.000010 | 625 | | | | +---------------------+----------+--------------+------------------+-------------------+ 1 row in set (0.03 sec) ##打開另一個終端：mysqldump -u root -p123456 --all-databases > /tmp/mysqldump.sql ##回到以前終端：unlock tables; #解表
##主master： ##拷貝數據到全部從庫： scp /tmp/mysqldump.sql 192.168.247.140:/tmp/ scp /tmp/mysqldump.sql 192.168.247.141:/tmp/
##salve1和slave2： ##導入數據： mysql -uroot -p123456 < /tmp/mysqldump.sql ##開始同步： mysql -uroot -p123456 ##注意：這裏指定的ip是master端的vip 201## change master to master_host='192.168.247.201',master_user='slave',master_password='123456',master_log_file='mysql-binlog.000010',master_log_pos=625,master_port=3306; start slave; ##啓動slave show slave status\G; ##查看狀態，兩個YES則正常 *************************** 1. row *************************** Slave_IO_State: Waiting for master to send event Master_Host: 192.168.247.201 Master_User: slave Master_Port: 3306 Connect_Retry: 60 Master_Log_File: mysql-binlog.000010 Read_Master_Log_Pos: 625 Relay_Log_File: mysql-relay-bin.000002 Relay_Log_Pos: 286 Relay_Master_Log_File: mysql-binlog.000010 Slave_IO_Running: Yes Slave_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Master_Log_Pos: 625 Relay_Log_Space: 459 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Master_SSL_Allowed: No Master_SSL_CA_File: Master_SSL_CA_Path: Master_SSL_Cert: Master_SSL_Cipher: Master_SSL_Key: Seconds_Behind_Master: 0 Master_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Master_Server_Id: 1 Master_UUID: 95e83a45-668a-11e5-aa2d-000c299d90cb Master_Info_File: /data/mysql/data/master.info SQL_Delay: 0 SQL_Remaining_Delay: NULL Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it Master_Retry_Count: 86400 Master_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Master_SSL_Crl: Master_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0 1 row in set (0.00 sec) ERROR: No query specified
主從複製測試：
測試一：master端切換drbd狀態（主備切換），查看slave端是否仍正常訪問
##此時主master是primary ##主master： [root@dbm138 ~]# /etc/init.d/heartbeat restart ##進行了主備切換
##slave1： [root@localhost ~]# mysql -h 192.168.247.201 -u slave -p123456 Warning: Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 4 Server version: 5.6.22-log Source distribution Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> ##仍可訪問
測試二：master端進行寫操做，查看可否同步到slave端
##此時備master是primary ##備master： [root@dbm139 ~]# mysql -p123456 Warning: Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 5 Server version: 5.6.22-log Source distribution Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> create database ku1; ##建立ku1 Query OK, 1 row affected (0.05 sec) mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | ku1 | | mysql | | performance_schema | | test | +--------------------+ 5 rows in set (0.07 sec)
##slave1： mysql -p123456 mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | ku1 | | mysql | | performance_schema | | test | +--------------------+ 5 rows in set (0.06 sec)
##slave2： mysql -p123456 mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | ku1 | | mysql | | performance_schema | | test | +--------------------+ 5 rows in set (0.06 sec)
##正常##
測試三：master端主備切換後再寫入
##此時備master是primary ##備master： /etc/init.d/heartbeat restart ##主備切換
##此時主master是primary ##主master： root@dbm138 ~]# mysql -p123456 Warning: Using a password on the command line interface can be insecure. Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 3 Server version: 5.6.22-log Source distribution Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved. Oracle is a registered trademark of Oracle Corporation and/or its affiliates. Other names may be trademarks of their respective owners. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. mysql> show databases; ##查看ku1是否存在 +--------------------+ | Database | +--------------------+ | information_schema | | ku1 | | mysql | | performance_schema | | test | +--------------------+ 5 rows in set (0.09 sec) mysql> create database ku2; ##建立ku2 Query OK, 1 row affected (0.06 sec) mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | ku1 | | ku2 | | mysql | | performance_schema | | test | +--------------------+ 6 rows in set (0.00 sec)
##slave1： mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | ku1 | | ku2 | | mysql | | performance_schema | | test | +--------------------+ 6 rows in set (0.00 sec)
##slave2： mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | ku1 | | ku2 | | mysql | | performance_schema | | test | +--------------------+ 6 rows in set (0.00 sec)
##切換後仍可訪問，且數據也同步了
安裝Atlas：
參考：https://github.com/Qihoo360/Atlas/blob/master/README_ZH.md
Atlas是由 Qihoo 360, Web平臺部基礎架構團隊開發維護的一個基於MySQL協議的數據中間層項目。 它在MySQL官方推出的MySQL-Proxy 0.8.2版本的基礎上，修改了大量bug，添加了不少功能特性。 目前該項目在360公司內部獲得了普遍應用，不少MySQL業務已經接入了Atlas平臺，天天承載的讀寫請求數達幾十億條。 主要功能： a.讀寫分離 b.從庫負載均衡 c.IP過濾 d.SQL語句黑白名單 e.自動分表 f.自動摘除宕機的DB
首先：全部庫服務器對Atlas端建立數據庫帳號（受權）
Atlas能夠經過這個帳號和密碼去鏈接全部的數據庫服務器
##此時主master是primary ##主master： mysql> GRANT ALL PRIVILEGES ON *.* TO 'Atlas'@'192.168.247.132' identified by 'mysql'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT ALL PRIVILEGES ON *.* TO 'Atlas'@'192.168.247.133' identified by 'mysql'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT ALL PRIVILEGES ON *.* TO 'Atlas'@'192.168.247.200' identified by 'mysql'; Query OK, 0 rows affected (0.00 sec) ##正常只對vip 247.200受權就能夠了，不過爲了可能出現的問題，這裏對Atlas的真實ip也受權了
##slave1： mysql> GRANT ALL PRIVILEGES ON *.* TO 'Atlas'@'192.168.247.132' identified by 'mysql'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT ALL PRIVILEGES ON *.* TO 'Atlas'@'192.168.247.133' identified by 'mysql'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT ALL PRIVILEGES ON *.* TO 'Atlas'@'192.168.247.200' identified by 'mysql'; Query OK, 0 rows affected (0.00 sec)
##slave2： mysql> GRANT ALL PRIVILEGES ON *.* TO 'Atlas'@'192.168.247.132' identified by 'mysql'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT ALL PRIVILEGES ON *.* TO 'Atlas'@'192.168.247.133' identified by 'mysql'; Query OK, 0 rows affected (0.00 sec) mysql> GRANT ALL PRIVILEGES ON *.* TO 'Atlas'@'192.168.247.200' identified by 'mysql'; Query OK, 0 rows affected (0.00 sec)
安裝Atlas：（Atlas主，Atlas備）
軟件下載地址：https://github.com/Qihoo360/Atlas/releases
cd /usr/local/src/ rpm -ivh Atlas-2.2.1.el6.x86_64.rpm [root@localhost src]# rpm -ql Atlas | grep conf /usr/local/mysql-proxy/conf/test.cnf /usr/local/mysql-proxy/lib/mysql-proxy/lua/proxy/auto-config.lua ##Atlas的配置文件：/usr/local/mysql-proxy/conf/test.cnf
##對Atlas的密碼mysql進行加密（上面全部庫的受權用戶） /usr/local/mysql-proxy/bin/encrypt mysql TWbz0dlu35U= ##加密後的密碼 ##修改配置文件: mv /usr/local/mysql-proxy/conf/test.cnf /usr/local/mysql-proxy/conf/test.cnf.old vi /usr/local/mysql-proxy/conf/test.cnf [mysql-proxy] plugins = admin,proxy #默認插件不用修改 admin-username=admin #Atlas管理員用戶 admin-password=admin #Atlas管理員密碼 admin-lua-script = /usr/local/mysql-proxy/lib/mysql-proxy/lua/admin.lua proxy-backend-addresses = 192.168.247.201:3306 #主庫的IP及端口,這裏是vip 201 proxy-read-only-backend-addresses = 192.168.247.140:3306,192.168.247.141:3306 #從庫的IP及端口 #proxy-read-only-backend-addresses = 192.168.247.140:3306@1,192.168.247.141:3306@2 ##權重爲1和2 pwds = Atlas:TWbz0dlu35U=, root:08xYdWX+7MBR/g== #Atlas用戶與其對應的加密過的密碼，逗號分隔多個 daemon = true #設置Atlas的運行方式，線上運行時設爲true keepalive = true #設置Atlas的運行方式，設爲true時Atlas會啓動兩個進程，一個爲monitor，一個爲worker，monitor在worker意外退出後會自動將其重啓，設爲false時只有worker，沒有monitor，通常開發調試時設爲false，線上運行時設爲true event-threads = 4 #工做線程數，對Atlas的性能有很大影響，系統的CPU核數的2至4倍 log-level = message #日誌級別，分爲message、warning、critical、error、debug五個級別 log-path = /usr/local/mysql-proxy/log #日誌路徑 instance = test #實例的名稱 proxy-address = 0.0.0.0:3306 #Atlas監聽的工做接口IP和端口，客戶端鏈接端口 admin-address = 0.0.0.0:2345 #Atlas監聽的管理接口IP和端口 charset = utf8 #默認字符集 ##注意：Atlas配置文件中不要出現漢字註釋，不然啓動會有問題## [mysql-proxy] plugins = admin,proxy admin-username=admin admin-password=admin admin-lua-script = /usr/local/mysql-proxy/lib/mysql-proxy/lua/admin.lua proxy-backend-addresses = 192.168.247.201:3306 proxy-read-only-backend-addresses = 192.168.247.140:3306,192.168.247.141:3306 pwds = Atlas:TWbz0dlu35U= daemon = true keepalive = true event-threads = 4 log-level = message log-path = /usr/local/mysql-proxy/log instance = test proxy-address = 0.0.0.0:3306 admin-address = 0.0.0.0:2345 charset = utf8
啓動Atlas：（Atlas主，Atlas備）
[root@localhost src]# /usr/local/mysql-proxy/bin/mysql-proxyd test start OK: MySQL-Proxy of test is started [root@localhost src]# netstat -tlnp | grep 3306 tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 1594/mysql-proxy [root@localhost src]# netstat -tlnp | grep 2345 tcp 0 0 0.0.0.0:2345 0.0.0.0:* LISTEN 1594/mysql-proxy ##關閉Atlas：/usr/local/mysql-proxy/bin/mysql-proxyd test stop ##重啓：/usr/local/mysql-proxy/bin/mysql-proxyd test restart
##建立啓動腳本：
vi /etc/init.d/atlas
#!/bin/sh
#
#atlas: Atlas Daemon
#
# chkconfig: - 90 25
# description: Atlas Daemon
#
# Source function library.
start()
{
echo -n $"Starting atlas: "
/usr/local/mysql-proxy/bin/mysql-proxyd test start
echo
}
stop()
{
echo -n $"Shutting down atlas: "
/usr/local/mysql-proxy/bin/mysql-proxyd test stop
echo
}
ATLAS="/usr/local/mysql-proxy/bin/mysql-proxyd"
[ -f $ATLAS ] || exit 1
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
stop
sleep 3
start
;;
*)
echo $"Usage: $0 {start|stop|restart}"
exit 1
esac
exit 0
chmod +x /etc/init.d/atlas
chkconfig atlas on
管理Atlas：（Atlas主）
##隨便選擇一臺Atlas，這裏選擇Atlas主##
##隨便找一臺數據庫服務器，如：slave1 ##slave1： mysql -h192.168.247.132 -P2345 -uadmin -padmin ##登陸Atlas主的管理界面##Atlas主的ip 132，管理端口2345，帳號admin mysql> select * from help; ##查看幫助 +----------------------------+---------------------------------------------------------+ | command | description | +----------------------------+---------------------------------------------------------+ | SELECT * FROM help | shows this help | | SELECT * FROM backends | lists the backends and their state | | SET OFFLINE $backend_id | offline backend server, $backend_id is backend_ndx's id | | SET ONLINE $backend_id | online backend server, ... | | ADD MASTER $backend | example: "add master 127.0.0.1:3306", ... | | ADD SLAVE $backend | example: "add slave 127.0.0.1:3306", ... | | REMOVE BACKEND $backend_id | example: "remove backend 1", ... | | SELECT * FROM clients | lists the clients | | ADD CLIENT $client | example: "add client 192.168.1.2", ... | | REMOVE CLIENT $client | example: "remove client 192.168.1.2", ... | | SELECT * FROM pwds | lists the pwds | | ADD PWD $pwd | example: "add pwd user:raw_password", ... | | ADD ENPWD $pwd | example: "add enpwd user:encrypted_password", ... | | REMOVE PWD $pwd | example: "remove pwd user", ... | | SAVE CONFIG | save the backends to config file | | SELECT VERSION | display the version of Atlas | +----------------------------+---------------------------------------------------------+ 16 rows in set (0.00 sec) mysql> SELECT * FROM backends; ##查看讀寫數據庫ip，端口 +-------------+----------------------+-------+------+ | backend_ndx | address | state | type | +-------------+----------------------+-------+------+ | 1 | 192.168.247.201:3306 | up | rw | | 2 | 192.168.247.140:3306 | up | ro | | 3 | 192.168.247.141:3306 | up | ro | +-------------+----------------------+-------+------+
經過Atlas做爲代理真正去管理全部的數據庫：
##這裏仍以Atlas主和slave1做爲測試## ##slave1： mysql -h192.168.247.132 -P3306 -uAtlas -pmysql ##Atlas主的ip 132，代理端口3306，帳號Atlas mysql> SHOW VARIABLES LIKE 'server_id'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 3 | +---------------+-------+ 1 row in set (0.01 sec) mysql> SHOW VARIABLES LIKE 'server_id'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 2 | +---------------+-------+ 1 row in set (0.01 sec) mysql> SHOW VARIABLES LIKE 'server_id'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 3 | +---------------+-------+ 1 row in set (0.00 sec) mysql> SHOW VARIABLES LIKE 'server_id'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 2 | +---------------+-------+ 1 row in set (0.00 sec) ##SHOW VARIABLES LIKE 'server_id'; 會輪訓獲取每臺讀數據庫的server-id mysql> create database ku3; Query OK, 1 row affected (0.01 sec) mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | ku1 | | ku2 | | ku3 | | mysql | | performance_schema | | test | +--------------------+ 7 rows in set (0.00 sec) ##寫操做也正常
安裝keepalived實現Atlas高可用：
參考：http://blog.csdn.net/jibcy/article/details/7826158
http://bbs.nanjimao.com/thread-855-1-1.ht
（Atlas主，Atlas備）
##安裝依賴包： yum -y install make gcc gcc-c++ bison-devel ncurses-devel kernel-devel readline-devel pcre-devel openssl-devel openssl zlib zlib-devel pcre-devel perl perl-devel ##安裝keepalived： cd /usr/local/src/ wget http://www.keepalived.org/software/keepalived-1.2.15.tar.gz tar -zxf keepalived-1.2.15.tar.gz cd keepalived-1.2.15 ./configure --prefix=/usr/local/keepalived make make install ##拷貝文件： cp -a /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/ cp -a /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ mkdir /etc/keepalived/ cp -a /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/ cp -a /usr/local/keepalived/sbin/keepalived /usr/sbin/ ##注意： /etc/sysconfig/keepalived 和 /etc/keepalived/keepalived.conf 的路徑必定要正確， ##由於在執行/etc/init.d/keepalived這個啓動腳本時，會讀取/etc/sysconfig/keepalived 和 /etc/keepalived/keepalived.conf 這兩個文件
（Atlas主）
##修改配置：
mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.old
vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
732233048@qq.com
}
notification_email_from root@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id Atlas_ha
}
vrrp_instance VI_1 {
state master
interface eth0
virtual_router_id 51
priority 150
advert_int 1
nopreempt
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.247.200
}
}
virtual_server 192.168.247.200 3306 {
delay_loop 6
#lb_algo wrr
#lb_kind DR
#persistence_timeout 50
protocol TCP
real_server 192.168.247.132 3306 {
#weight 3
notify_down /etc/keepalived/keepalived_monitor.sh
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
}
（Atlas備）
##修改配置：
mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.old
vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
notification_email {
732233048@qq.com
}
notification_email_from root@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id Atlas_ha
}
vrrp_instance VI_1 {
state backup
interface eth0
virtual_router_id 51
priority 100
advert_int 1
#nopreempt
authentication {
auth_type PASS
auth_pass 1111
}
virtual_ipaddress {
192.168.247.200
}
}
virtual_server 192.168.247.200 3306 {
delay_loop 6
#lb_algo wrr
#lb_kind DR
#persistence_timeout 50
protocol TCP
real_server 192.168.247.133 3306 {
#weight 3
notify_down /etc/keepalived/keepalived_monitor.sh
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 3306
}
}
}
（Atlas主，Atlas備）
##建立/etc/keepalived/keepalived_monitor.sh腳本： vi /etc/keepalived/keepalived_monitor.sh #!/bin/bash # check Atlas server status Atlas_status=`netstat -tlnp | grep 0.0.0.0:3306 | grep LISTEN | wc -l` if [ $Atlas_status -eq 0 ];then /etc/init.d/atlas start sleep 1 Atlas_status=`netstat -tlnp | grep 0.0.0.0:3306 | grep LISTEN | wc -l` if [ $Atlas_status -eq 0 ];then /etc/init.d/keepalived stop fi fi
chmod 755 /etc/keepalived/keepalived_monitor.sh
（Atlas主，Atlas備）
##修改keepalived的日誌文件## 參考：http://chenwenming.blog.51cto.com/327092/745316 說明： centos6.3以後的syslog更名叫rsyslog了，默認在 /etc/rsyslog.conf
##修改/etc/sysconfig/keepalived： vi /etc/sysconfig/keepalived # Options for keepalived. See `keepalived --help' output and keepalived(8) and # keepalived.conf(5) man pages for a list of all options. Here are the most # common ones : # # --vrrp -P Only run with VRRP subsystem. # --check -C Only run with Health-checker subsystem. # --dont-release-vrrp -V Dont remove VRRP VIPs & VROUTEs on daemon stop. # --dont-release-ipvs -I Dont remove IPVS topology on daemon stop. # --dump-conf -d Dump the configuration data. # --log-detail -D Detailed log messages. # --log-facility -S 0-7 Set local syslog facility (default=LOG_DAEMON) # #KEEPALIVED_OPTIONS="-D" KEEPALIVED_OPTIONS="-D -d -S 0" ##在最後添加此行 ##修改/etc/rsyslog.conf: vi /etc/rsyslog.conf ##在最後添加此行： local0.* /var/log/keepalived.log ## /etc/init.d/rsyslog restart Shutting down system logger: [ OK ] Starting system logger: [ OK ]
（Atlas主）
##啓動keepalived： /etc/init.d/keepalived start
Sep 29 10:58:12 localhost Keepalived[3544]: Starting Keepalived v1.2.15 (09/29,2015) Sep 29 10:58:12 localhost Keepalived[3545]: Starting Healthcheck child process, pid=3547 Sep 29 10:58:12 localhost Keepalived[3545]: Starting VRRP child process, pid=3548 Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Netlink reflector reports IP 192.168.247.132 added Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Initializing ipvs 2.6 Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Netlink reflector reports IP fe80::20c:29ff:fe5c:722c added Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Registering Kernel netlink reflector Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Registering Kernel netlink command channel Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Registering gratuitous ARP shared channel Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Opening file '/etc/keepalived/keepalived.conf'. Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Configuration is using : 63286 Bytes Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: ------< Global definitions >------ Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Router ID = Atlas_ha Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Smtp server = 127.0.0.1 Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Smtp server connection timeout = 30 Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Email notification from = root@localhost Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Email notification = 732233048@qq.com Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: VRRP IPv4 mcast group = 224.0.0.18 Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: VRRP IPv6 mcast group = 224.0.0.18 Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: ------< VRRP Topology >------ Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: VRRP Instance = VI_1 Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Want State = BACKUP Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Runing on device = eth0 Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Gratuitous ARP repeat = 5 Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Gratuitous ARP refresh repeat = 1 Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Virtual Router ID = 51 Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Priority = 150 Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Advert interval = 1sec Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Preempt disabled Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Authentication type = SIMPLE_PASSWORD Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Password = 1111 Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Virtual IP = 1 Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: 192.168.247.200/32 dev eth0 scope global Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: Using LinkWatch kernel netlink reflector... Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: VRRP_Instance(VI_1) Entering BACKUP STATE Sep 29 10:58:12 localhost Keepalived_vrrp[3548]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(10,11)] Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Netlink reflector reports IP 192.168.247.132 added Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Netlink reflector reports IP fe80::20c:29ff:fe5c:722c added Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Registering Kernel netlink reflector Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Registering Kernel netlink command channel Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Opening file '/etc/keepalived/keepalived.conf'. Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Configuration is using : 11723 Bytes Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: IPVS: Scheduler or persistence engine not found Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: IPVS: No such process Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: ------< Global definitions >------ Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Router ID = Atlas_ha Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Smtp server = 127.0.0.1 Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Smtp server connection timeout = 30 Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Email notification from = root@localhost Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Email notification = 732233048@qq.com Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: VRRP IPv4 mcast group = 224.0.0.18 Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: VRRP IPv6 mcast group = 224.0.0.18 Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: ------< SSL definitions >------ Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Using autogen SSL context Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: ------< LVS Topology >------ Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: System is compiled with LVS v1.2.1 Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: VIP = 192.168.247.200, VPORT = 3306 Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: delay_loop = 6, lb_algo = Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: protocol = TCP Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: alpha is OFF, omega is OFF Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: quorum = 1, hysteresis = 0 Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: lb_kind = NAT Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: RIP = 192.168.247.132, RPORT = 3306, WEIGHT = 1 Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: -> Notify script DOWN = /etc/keepalived/keepalived_monitor.sh Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: ------< Health checkers >------ Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: [192.168.247.132]:3306 Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Keepalive method = TCP_CHECK Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Connection dest = [192.168.247.132]:3306 Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Connection timeout = 10 Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Using LinkWatch kernel netlink reflector... Sep 29 10:58:12 localhost Keepalived_healthcheckers[3547]: Activating healthchecker for service [192.168.247.132]:3306 Sep 29 10:58:15 localhost Keepalived_vrrp[3548]: VRRP_Instance(VI_1) Transition to MASTER STATE Sep 29 10:58:16 localhost Keepalived_vrrp[3548]: VRRP_Instance(VI_1) Entering MASTER STATE Sep 29 10:58:16 localhost Keepalived_vrrp[3548]: VRRP_Instance(VI_1) setting protocol VIPs. Sep 29 10:58:16 localhost Keepalived_vrrp[3548]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.247.200 Sep 29 10:58:16 localhost Keepalived_healthcheckers[3547]: Netlink reflector reports IP 192.168.247.200 added Sep 29 10:58:21 localhost Keepalived_vrrp[3548]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.247.200 ##進入master狀態 ##綁定vip 200 ##檢測ip 132 ##設置開機自動啓動 chkconfig keepalived on
（Atlas備）
##啓動： /etc/init.d/keepalived start
Sep 29 11:01:55 localhost Keepalived[3274]: Starting Keepalived v1.2.15 (09/29,2015) Sep 29 11:01:55 localhost Keepalived[3275]: Starting Healthcheck child process, pid=3277 Sep 29 11:01:55 localhost Keepalived[3275]: Starting VRRP child process, pid=3278 Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Initializing ipvs 2.6 Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Netlink reflector reports IP 192.168.247.133 added Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Netlink reflector reports IP fe80::20c:29ff:fe01:3824 added Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Netlink reflector reports IP 192.168.247.133 added Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Registering Kernel netlink reflector Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Registering Kernel netlink command channel Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Registering gratuitous ARP shared channel Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Opening file '/etc/keepalived/keepalived.conf'. Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Netlink reflector reports IP fe80::20c:29ff:fe01:3824 added Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Registering Kernel netlink reflector Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Registering Kernel netlink command channel Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Opening file '/etc/keepalived/keepalived.conf'. Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Configuration is using : 63266 Bytes Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: ------< Global definitions >------ Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Router ID = Atlas_ha Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Smtp server = 127.0.0.1 Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Smtp server connection timeout = 30 Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Email notification from = root@localhost Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Email notification = 732233048@qq.com Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: VRRP IPv4 mcast group = 224.0.0.18 Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: VRRP IPv6 mcast group = 224.0.0.18 Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: ------< VRRP Topology >------ Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: VRRP Instance = VI_1 Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Want State = BACKUP Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Runing on device = eth0 Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Gratuitous ARP repeat = 5 Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Gratuitous ARP refresh repeat = 1 Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Virtual Router ID = 51 Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Priority = 100 Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Advert interval = 1sec Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Authentication type = SIMPLE_PASSWORD Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Password = 1111 Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Virtual IP = 1 Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: 192.168.247.200/32 dev eth0 scope global Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: Using LinkWatch kernel netlink reflector... Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Configuration is using : 11703 Bytes Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: VRRP_Instance(VI_1) Entering BACKUP STATE Sep 29 11:01:55 localhost Keepalived_vrrp[3278]: VRRP sockpool: [ifindex(2), proto(112), unicast(0), fd(10,11)] Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: IPVS: Scheduler or persistence engine not found Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: IPVS: No such process Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: ------< Global definitions >------ Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Router ID = Atlas_ha Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Smtp server = 127.0.0.1 Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Smtp server connection timeout = 30 Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Email notification from = root@localhost Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Email notification = 732233048@qq.com Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: VRRP IPv4 mcast group = 224.0.0.18 Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: VRRP IPv6 mcast group = 224.0.0.18 Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: ------< SSL definitions >------ Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Using autogen SSL context Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: ------< LVS Topology >------ Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: System is compiled with LVS v1.2.1 Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: VIP = 192.168.247.200, VPORT = 3306 Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: delay_loop = 6, lb_algo = Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: protocol = TCP Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: alpha is OFF, omega is OFF Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: quorum = 1, hysteresis = 0 Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: lb_kind = NAT Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: RIP = 192.168.247.133, RPORT = 3306, WEIGHT = 1 Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: -> Notify script DOWN = /etc/keepalived/keepalived_monitor.sh Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: ------< Health checkers >------ Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: [192.168.247.133]:3306 Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Keepalive method = TCP_CHECK Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Connection dest = [192.168.247.133]:3306 Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Connection timeout = 10 Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Using LinkWatch kernel netlink reflector... Sep 29 11:01:55 localhost Keepalived_healthcheckers[3277]: Activating healthchecker for service [192.168.247.133]:3306 ##進入backup狀態 ##檢測ip 133
查看vip綁定在哪臺機器上：
（Atlas主）
# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 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 pfifo_fast state UP qlen 1000 link/ether 00:0c:29:5c:72:2c brd ff:ff:ff:ff:ff:ff inet 192.168.247.132/24 brd 192.168.247.255 scope global eth0 inet 192.168.247.200/32 scope global eth0 inet6 fe80::20c:29ff:fe5c:722c/64 scope link valid_lft forever preferred_lft forever ##vip 200綁定在Atlas主 ##設置開機自動啓動 chkconfig keepalived on
（Atlas備）
# ip addr 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 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 pfifo_fast state UP qlen 1000 link/ether 00:0c:29:01:38:24 brd ff:ff:ff:ff:ff:ff inet 192.168.247.133/24 brd 192.168.247.255 scope global eth0 inet6 fe80::20c:29ff:fe01:3824/64 scope link valid_lft forever preferred_lft forever
Atlas主備之間測試：
測試一：把Atlas主的Atlas服務stop掉
##Atlas主： /etc/init.d/atlas stop ##查看日誌： Sep 29 11:06:42 localhost Keepalived_healthcheckers[3547]: TCP connection to [192.168.247.132]:3306 failed !!! Sep 29 11:06:42 localhost Keepalived_healthcheckers[3547]: Removing service [192.168.247.132]:3306 from VS [192.168.247.200]:3306 Sep 29 11:06:42 localhost Keepalived_healthcheckers[3547]: IPVS: Service not defined Sep 29 11:06:42 localhost Keepalived_healthcheckers[3547]: Executing [/etc/keepalived/keepalived_monitor.sh] for service [192.168.247.132]:3306 in VS [192.168.247.200]:3306 Sep 29 11:06:42 localhost Keepalived_healthcheckers[3547]: Lost quorum 1-0=1 > 0 for VS [192.168.247.200]:3306 Sep 29 11:06:42 localhost Keepalived_healthcheckers[3547]: Remote SMTP server [127.0.0.1]:25 connected. Sep 29 11:06:43 localhost Keepalived_healthcheckers[3547]: SMTP alert successfully sent. Sep 29 11:06:48 localhost Keepalived_healthcheckers[3547]: TCP connection to [192.168.247.132]:3306 success. Sep 29 11:06:48 localhost Keepalived_healthcheckers[3547]: Adding service [192.168.247.132]:3306 to VS [192.168.247.200]:3306 Sep 29 11:06:48 localhost Keepalived_healthcheckers[3547]: IPVS: Service not defined Sep 29 11:06:48 localhost Keepalived_healthcheckers[3547]: Gained quorum 1+0=1 <= 1 for VS [192.168.247.200]:3306 Sep 29 11:06:48 localhost Keepalived_healthcheckers[3547]: Remote SMTP server [127.0.0.1]:25 connected. Sep 29 11:06:48 localhost Keepalived_healthcheckers[3547]: SMTP alert successfully sent. ##Atlas服務stop後，keepalived把它從集羣中移除，而後又把它啓動起來，加入集羣
測試二：把Atlas備的Atlas服務stop掉
##Atlas服務stop後，keepalived把它從集羣中移除，而後又把它啓動起來，加入集羣
測試三：把Atlas主的keepalived服務stop掉
##Atlas主： /etc/init.d/keepalived stop ##查看日誌： Sep 29 11:10:34 localhost Keepalived[3545]: Stopping Keepalived v1.2.15 (09/29,2015) Sep 29 11:10:34 localhost Keepalived_vrrp[3548]: VRRP_Instance(VI_1) sending 0 priority Sep 29 11:10:34 localhost Keepalived_vrrp[3548]: VRRP_Instance(VI_1) removing protocol VIPs. Sep 29 11:10:34 localhost Keepalived_healthcheckers[3547]: Netlink reflector reports IP 192.168.247.200 removed Sep 29 11:10:34 localhost Keepalived_healthcheckers[3547]: Removing service [192.168.247.132]:3306 from VS [192.168.247.200]:3306 Sep 29 11:10:34 localhost Keepalived_healthcheckers[3547]: IPVS: Service not defined Sep 29 11:10:34 localhost Keepalived_healthcheckers[3547]: IPVS: No such service ##移除虛擬ip
##Atlas備查看日誌： Sep 29 11:10:35 localhost Keepalived_vrrp[3278]: VRRP_Instance(VI_1) Transition to MASTER STATE Sep 29 11:10:36 localhost Keepalived_vrrp[3278]: VRRP_Instance(VI_1) Entering MASTER STATE Sep 29 11:10:36 localhost Keepalived_vrrp[3278]: VRRP_Instance(VI_1) setting protocol VIPs. Sep 29 11:10:36 localhost Keepalived_healthcheckers[3277]: Netlink reflector reports IP 192.168.247.200 added Sep 29 11:10:36 localhost Keepalived_vrrp[3278]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.247.200 Sep 29 11:10:41 localhost Keepalived_vrrp[3278]: VRRP_Instance(VI_1) Sending gratuitous ARPs on eth0 for 192.168.247.200 ##變爲master狀態 ##綁定vip 200
測試四：Atlas主的keepalived從新啓動
/etc/init.d/keepalived start ##結果：Atlas主並無變爲master，而是做爲了backup，由於在配置文件中，咱們使用了nopreempt參數，不搶佔（注：只能在優先級高的一端才能配這個參數）
測試五：把Atlas備的keepalived服務stop掉
##前提是Atlas備此時對外服務 ##正常切換
測試六：把Atlas主的Atlas服務stop掉，並再也不讓其成功啓動
##Atlas主的keepalived被stop掉，正常主備切換
測試訪問vip 200，來管理數據庫
##此時的兩臺Atlas，一臺對外服務，一臺處於空閒狀態##
##隨便選擇一臺數據庫，如slave2：這裏只是選擇用來登陸，隨便一臺數據庫均可以 ##也能夠用windows下的navicat來登陸，ip是200，端口是3306，帳號是Atlas ##slave2： mysql -h192.168.247.200 -P3306 -uAtlas -pmysql ##這裏必須是vip 200，端口3306，帳號Atlas mysql> show databases; ##查看數據庫 +--------------------+ | Database | +--------------------+ | information_schema | | ku1 | | ku2 | | ku3 | | ku4 | | mysql | | performance_schema | | test | +--------------------+ 8 rows in set (0.01 sec) mysql> SHOW VARIABLES LIKE 'server_id'; ##輪訓獲取讀數據庫的server-id，讀負載均衡正常 +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 2 | +---------------+-------+ 1 row in set (0.01 sec) mysql> SHOW VARIABLES LIKE 'server_id'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 3 | +---------------+-------+ 1 row in set (0.01 sec) mysql> SHOW VARIABLES LIKE 'server_id'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 2 | +---------------+-------+ 1 row in set (0.01 sec) mysql> SHOW VARIABLES LIKE 'server_id'; +---------------+-------+ | Variable_name | Value | +---------------+-------+ | server_id | 3 | +---------------+-------+ 1 row in set (0.00 sec) mysql> create database ku5; ##建立ku5 Query OK, 1 row affected (0.01 sec) mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | ku1 | | ku2 | | ku3 | | ku4 | | ku5 | | mysql | | performance_schema | | test | +--------------------+ 9 rows in set (0.00 sec ##到其它任何一臺數據庫查看是否數據同步 ##如：slave1： mysql -p123456 mysql> show databases; ##數據同步正常 +--------------------+ | Database | +--------------------+ | information_schema | | ku1 | | ku2 | | ku3 | | ku4 | | ku5 | | mysql | | performance_schema | | test | +--------------------+ 9 rows in set (0.01 sec)
##測試：將Atlas進行主備切換，查看訪問200是否仍正常##
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