Mha-Atlas-MySQL高可用方案實踐(二)
六,配置VIP漂移
主機名 | IP地址(NAT) | 漂移VIP | 描述 |
---|---|---|---|
mysql-db01 | eth0:192.168.0.51 | VIP:192.168.0.60 | 系統:CentOS6.5(6.x都可以) 安裝:mysql5.6 |
mysql-db02 | eth0:192.168.0.52 | VIP:192.168.0.60 | 系統:CentOS6.5(6.x都可以) 安裝:mysql5.6 |
mysql-db03 | eth0:192.168.0.53 | VIP:192.168.0.60 | 系統:CentOS6.5(6.x都可以) 安裝:mysql5.6 |
6.1 IP漂移的兩種方式
- 通過keepalived的方式,管理虛擬IP的漂移
- 通過MHA自帶指令碼方式,管理虛擬IP的漂移
6.2 MHA指令碼管理方式
(1)獲取管理指令碼master_ip_failover
提示:yum安裝的manager是沒有這個指令碼的。
我們需要從manager的原始碼包裡複製一個。
[root@mysql-db03 ~]# ll mha4mysql-manager-0.56.tar.gz
-rw-r--r--. 1 root root 113914 Sep 4 18:43 mha4mysql-manager-0.56.tar.gz
[root@mysql-db03 ~]# tar xf mha4mysql-manager-0.56.tar.gz
[root@mysql-db03 ~]# cd mha4mysql-manager-0.56
[root@mysql-db03 mha4mysql-manager-0.56]# cd samples/scripts/
[root@mysql-db03 scripts]# ll
total 32
-rwxr-xr-x. 1 4984 users 3648 Mar 31 2014 master_ip_failover #這就是管理虛擬IP的指令碼
-rwxr-xr-x. 1 4984 users 9870 Mar 31 2014 master_ip_online_change
-rwxr-xr-x. 1 4984 users 11867 Mar 31 2014 power_manager
-rwxr-xr-x. 1 4984 users 1360 Mar 31 2014 send_report
[root@mysql-db03 scripts]# cp master_ip_failover /usr/local/bin/ #複製到/usr/local/bin目錄下
[root@mysql-db03 scripts]# which master_ip_failover
/usr/local/bin/master_ip_failover
(2)修改mha配置檔案
[root@mysql-db03 scripts]# vim /etc/mha/mha1.cnf
[root@mysql-db03 scripts]# cat /etc/mha/mha1.cnf
[server default]
manager_log=/var/log/mha/mha1/manager
manager_workdir=/var/log/mha/mha1
master_binlog_dir=/usr/local/mysql/data
master_ip_failover_script=/usr/local/bin/master_ip_failover #新增指令碼位置
password=123123
ping_interval=2
repl_password=123123
repl_user=rep
ssh_user=root
user=mha
#candidate_master=1 #留著備用的註釋項
#check_repl_delay=0 #留著備用的註釋項
[server1]
hostname=192.168.0.51
port=3306
[server2]
hostname=192.168.0.52
port=3306
[server3]
hostname=192.168.0.53
port=3306
(3)修改源程式自帶VIP漂移指令碼
#在下邊的腳本里新增如下4行程式碼:
[root@mysql-db03 scripts]# sed -n '34,37p' /usr/local/bin/master_ip_failover
my $vip = '192.168.0.60/24'; #定義VIP
my $key = '0'; #定義網絡卡字尾數值,如果eth0就是0,eth1就是1
my $ssh_start_vip = "/sbin/ifconfig eth0:$key $vip"; #繫結VIP的命令
my $ssh_stop_vip = "/sbin/ifconfig eth0:$key down"; #關閉VIP的命令
特別提示:
由於自帶的模板指令碼特別的坑,需要修改的地方太多,因此,同學們可以直接拷貝指令碼檔案放到/usr/local/bin目錄下,並賦予x許可權。
修改後的master_ip_failover指令碼的內容如下:
[root@mysql-db03 ~]# cat /usr/local/bin/master_ip_failover
#!/usr/bin/env perl
use strict;
use warnings FATAL => 'all';
use Getopt::Long;
my (
$command, $ssh_user, $orig_master_host,
$orig_master_ip, $orig_master_port, $new_master_host,
$new_master_ip, $new_master_port
);
my $vip = '192.168.0.60/24';
my $key = '0';
my $ssh_start_vip = "/sbin/ifconfig eth0:$key $vip";
my $ssh_stop_vip = "/sbin/ifconfig eth0:$key down";
GetOptions(
'command=s' => \$command,
'ssh_user=s' => \$ssh_user,
'orig_master_host=s' => \$orig_master_host,
'orig_master_ip=s' => \$orig_master_ip,
'orig_master_port=i' => \$orig_master_port,
'new_master_host=s' => \$new_master_host,
'new_master_ip=s' => \$new_master_ip,
'new_master_port=i' => \$new_master_port,
);
exit &main();
sub main {
if ( $command eq "stop" || $command eq "stopssh" ) {
my $exit_code = 1;
eval {
print "Disabling the VIP on old master:$orig_master_host \n";
&stop_vip();
$exit_code = 0;
};
if ($@) {
warn "Got Error: $@\n";
exit $exit_code;
}
exit $exit_code;
}
elsif ( $command eq "start" ) {
my $exit_code = 10;
eval {
print "Enabling the VIP - $vip on the new master - $new_master_host \n";
&start_vip();
$exit_code = 0;
};
if ($@) {
warn $@;
exit $exit_code;
}
exit $exit_code;
}
elsif ( $command eq "status" ) {
print "Checking the Status of the script..OK \n";
`ssh $ssh_user\@$orig_master_host \" $ssh_start_vip \"`;
exit 0;
}
else {
&usage();
exit 1;
}
}
sub start_vip() {
`ssh $ssh_user\@$new_master_host \" $ssh_start_vip \"`;
}
sub stop_vip() {
`ssh $ssh_user\@$orig_master_host \" $ssh_stop_vip \"`;
}
sub usage {
print
"Usage: master_ip_failover --command=start|stop|stopssh|status --orig_master_host=host --orig_master_ip=ip --orig_master_port=port --new_master_host=host --new_master_ip=ip --new_master_port=port\n";
}
(4)重啟動mha管理端
[root@mysql-db03 ~]# ps -ef | grep mha | grep -v grep #檢視mha程序
root 14138 13211 0 19:22 pts/3 00:00:00 perl /usr/bin/masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover
[root@mysql-db03 ~]# pkill perl #殺掉perl程序
[1]+ Exit 1 nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/mha1/manager.log 2>&1
[root@mysql-db03 ~]# ps -ef | grep mha | grep -v grep #檢視mha程序
[root@mysql-db03 ~]# nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > #啟動mha程序 /var/log/mha/mha1/manager.log 2>&1 &
提示:
如果啟動mha程序失敗,需要進行mha的連線檢測
masterha_check_ssh --conf=/etc/mha/mha1.cnf
ssh連線檢測
masterha_check_repl --conf=/etc/mha/mha1.cnf
主從複製檢測
6.3 VIP漂移指令碼驗證測試。
架構初始狀態:
(1)檢視mysql-db01網路狀態
(2)停掉mysql-db01的MySQL資料庫服務
[root@mysql-db01 ~]# /etc/init.d/mysqld stop
Shutting down MySQL..... SUCCESS!
[root@mysql-db01 ~]# ifconfig #VIP消失了
eth0 Link encap:Ethernet HWaddr 00:0C:29:59:7C:EF
inet addr:192.168.0.51 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe59:7cef/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:316130 errors:0 dropped:0 overruns:0 frame:0
TX packets:58058 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:363635227 (346.7 MiB) TX bytes:6462008 (6.1 MiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:69 errors:0 dropped:0 overruns:0 frame:0
TX packets:69 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:9752 (9.5 KiB) TX bytes:9752 (9.5 KiB)
(3)檢視mysql-db02
[root@mysql-db02 ~]# ifconfig #VIP出現了
eth0 Link encap:Ethernet HWaddr 00:0C:29:4C:D5:92
inet addr:192.168.0.52 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe4c:d592/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:287225 errors:0 dropped:0 overruns:0 frame:0
TX packets:47133 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:361247254 (344.5 MiB) TX bytes:5159560 (4.9 MiB)
eth0:0 Link encap:Ethernet HWaddr 00:0C:29:4C:D5:92
inet addr:192.168.0.60 Bcast:192.168.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:45 errors:0 dropped:0 overruns:0 frame:0
TX packets:45 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:7718 (7.5 KiB) TX bytes:7718 (7.5 KiB)
(4)檢視mysql-db03的主從同步情況
[root@mysql-db03 ~]# mysql -uroot -p123123 -e 'show slave status\G'
Warning: Using a password on the command line interface can be insecure.
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.0.52 #mysql-db03的主庫已經切換為mysql-db02
Master_User: rep
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000008
Read_Master_Log_Pos: 271
Relay_Log_File: mysql-db03-relay-bin.000002
Relay_Log_Pos: 361
Relay_Master_Log_File: mysql-bin.000008
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
(5)mysql-db01故障恢復
[root@mysql-db01 ~]# /etc/init.d/mysqld start
Starting MySQL. SUCCESS!
[root@mysql-db01 ~]# mysql -uroot -p123123
mysql> CHANGE MASTER TO MASTER_HOST='192.168.0.52', MASTER_PORT=3306, MASTER_AUTO_POSITION=1, MASTER_USER='rep', MASTER_PASSWORD='123123';
Query OK, 0 rows affected, 2 warnings (0.02 sec)
mysql> start slave;
Query OK, 0 rows affected, 1 warning (0.01 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.0.52
Master_User: rep
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000008
Read_Master_Log_Pos: 271
Relay_Log_File: mysql-db01-relay-bin.000002
Relay_Log_Pos: 361
Relay_Master_Log_File: mysql-bin.000008
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
(6)補上缺失的mha配置檔案
[root@mysql-db03 ~]# vim /etc/mha/mha1.cnf
[root@mysql-db03 ~]# cat /etc/mha/mha1.cnf
[server default]
manager_log=/var/log/mha/mha1/manager
manager_workdir=/var/log/mha/mha1
master_binlog_dir=/usr/local/mysql/data
master_ip_failover_script=/usr/local/bin/master_ip_failover
password=123123
ping_interval=2
repl_password=123123
repl_user=rep
ssh_user=root
user=mha
[server1]
hostname=192.168.0.51
port=3306
[server2]
hostname=192.168.0.52
port=3306
[server3]
hostname=192.168.0.53
port=3306
(7)啟動mha管理程序
[root@mysql-db03 ~]# ps -ef | grep mha | grep -v grep
[root@mysql-db03 ~]# nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/mha1/manager.log 2>&1 &
[1] 14921
[root@mysql-db03 ~]# ps -ef | grep mha | grep -v grep
root 14921 13211 3 20:11 pts/3 00:00:00 perl /usr/bin/masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover
此時的架構狀態
七,配置binlog-server備份伺服器
主庫宕機,也許會造成主庫binlog複製不及時而導致資料丟失的情況出現,因此配置binlog-server進行時時同步備份,是必要的一種安全手段。
7.1 修改mha配置檔案
[root@mysql-db03 ~]# cat /etc/mha/mha1.cnf
[server default]
manager_log=/var/log/mha/mha1/manager
manager_workdir=/var/log/mha/mha1
master_binlog_dir=/usr/local/mysql/data #全域性的binlog存放位置
master_ip_failover_script=/usr/local/bin/master_ip_failover
password=123123
ping_interval=2
repl_password=123123
repl_user=rep
ssh_user=root
user=mha
[server1]
hostname=192.168.0.51
port=3306
[server2]
hostname=192.168.0.52
port=3306
[server3]
hostname=192.168.0.53
port=3306
[binlog1] #新增binlog模組
no_master=1 #不允許切換為主
hostname=192.168.0.53 #存放IP
master_binlog_dir=/data/mysql/binlog/ #binlog存放位置優先順序比全域性的高
7.2 拉取主庫上的binlog日誌到mysql-db03的存放目錄裡
[root@mysql-db03 ~]# mkdir -p /data/mysql/binlog #建立存放目錄
[root@mysql-db03 ~]# cd /data/mysql/binlog/ #進入存放目錄
[root@mysql-db03 binlog]# ll
total 0
[root@mysql-db03 binlog]# which mysqlbinlog
/usr/local/bin/mysqlbinlog
[root@mysql-db03 binlog]# mysqlbinlog -R --host=192.168.0.52 --user=mha --password=123123 --raw --stop-never mysql-bin.000001 & #拉取主庫binlog
[2] 15694
[root@mysql-db03 binlog]# Warning: Using a password on the command line interface can be insecure.
[root@mysql-db03 binlog]# ll
total 32
-rw-r--r--. 1 root root 143 Sep 5 20:53 mysql-bin.000001
-rw-r--r--. 1 root root 143 Sep 5 20:53 mysql-bin.000002
-rw-r--r--. 1 root root 331 Sep 5 20:53 mysql-bin.000003
-rw-r--r--. 1 root root 3114 Sep 5 20:53 mysql-bin.000004
-rw-r--r--. 1 root root 254 Sep 5 20:53 mysql-bin.000005
-rw-r--r--. 1 root root 800 Sep 5 20:53 mysql-bin.000006
-rw-r--r--. 1 root root 2714 Sep 5 20:53 mysql-bin.000007
-rw-r--r--. 1 root root 120 Sep 5 20:53 mysql-bin.000008
[root@mysql-db03 binlog]# ps -ef | grep mysqlbinlog | grep -v grep
root 16061 12786 0 20:53 pts/2 00:00:00 mysqlbinlog -R --host=192.168.0.52 --user=mha --password=x xxxx --raw --stop-never mysql-bin.000001
7.3 啟動mha管理程序
[root@mysql-db03 binlog]# nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/mha1/manager.log 2>&1 &
[root@mysql-db03 binlog]# ps -ef | grep perl | grep -v grep
root 15697 13211 0 20:42 pts/3 00:00:00 perl /usr/bin/masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover
八,mysql中介軟體Atlas
8.1 Atlas簡介
Atlas是由Qihoo-360公司web平臺部基礎架構團隊開發維護的一個基於MySQL協議的資料中間層專案。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,添加了很多功能特性。它在MySQL官方推出的MySQL-Proxy0.8.2版本的基礎上,修改了大量bug,添加了很多功能特性。
8.2 Atlas主要功能
- 讀寫分離
- 從庫負載均衡
- IP過濾
- 自動分表
- DBA可平滑上下線DB
- 自動摘除宕機的DB
8.3 Atlas相對於官方MySQL-Proxy的優勢
- 將主流程中所有Lua程式碼用C重寫,Lua僅用於管理介面。
- 重寫網路模型,執行緒模型
- 實現了真正意義上的連線池
- 優化了鎖機制,效能提高數十倍
8.4 安裝Atlas
同學麼比較有福氣,安裝Atlas超級簡單,官方提供的Atlas有兩種:
(普通):Atlas-2.2.1.el6.x86_64.rpm
(分表):Atlas-sharding_1.0.1-el6.x86_64.rpm
這裡我們只需要下載普通的即可
[root@mysql-db03 rpm]# rpm -ivh Atlas-2.2.1.el6.x86_64.rpm
Preparing... ########################################### [100%]
package Atlas-2.2.1-1.x86_64 is already installed
8.5 配置Atlas
當我們用vim開啟/usr/local/mysql-proxy/conf時,我們驚喜的發現。。。這個配置檔案完全都根本不用講。。。簡直太簡單了。好了課程到此結束,同學們自行閱讀。
(1)配置檔案裡需要做如下修改:
#需要修改的內容一覽:
[root@mysql-db03 ~]# cat -n /usr/local/mysql-proxy/conf/test.cnf.bak | egrep -w "12|15|18|30|36|48"
12 proxy-backend-addresses = 127.0.0.1:3306
15 #proxy-read-only-backend-addresses = 127.0.0.1:3305@1
18 pwds = user1:+jKsgB3YAG8=, user2:GS+tr4TPgqc=
30 log-level = message
36 #sql-log = OFF
45 proxy-address = 0.0.0.0:1234
48 admin-address = 0.0.0.0:2345
#將上邊內容修改為如下配置:
[root@mysql-db03 ~]# cat -n /usr/local/mysql-proxy/conf/test.cnf | egrep -w "12|15|18|30|36|48"
12 proxy-backend-addresses = 192.168.0.60:3307 #這裡新增VIP地址
15 proxy-read-only-backend-addresses = 192.168.0.51:3307@1,192.168.0.53:3307@1 #從庫地址
18 pwds = root:++gAN07C/Q0=,mha:++gAN07C/Q0= #MySQL授權使用者賬號密碼(密碼要加密)
30 log-level = error #日誌級別
36 sql-log = ON #開啟日誌
45 proxy-address = 192.168.0.53:3306 #Atlas的工作監聽埠(提供代理服務)
48 admin-address = 192.168.0.53:1234 #Atlas的管理監聽埠
> 提示:
> 主從複製的主從資料庫的預設3306埠需要修改成3307
> 第18行為登陸MySQL的授權賬號資訊,其中密碼需要加密(通過/usr/local/mysql-proxy/bin/encrypt加密工具來加密)
(2)修改每個資料庫的服務埠為3307
#先殺掉mha管理程序
[root@mysql-db03 conf]# ps -ef | grep mha | grep -v grep
root 15697 1 0 Sep05 ? 00:00:09 perl /usr/bin/masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover
[root@mysql-db03 conf]# kill -9 15697
[root@mysql-db03 conf]# ps -ef | grep mha | grep -v grep
#修改mysql-db01,mysql-db02,mysql-db03上的MySQL服務埠為3307
[root@mysql-db03 conf]# sed -n '13p' /etc/my.cnf
port = 3307
[root@mysql-db02 conf]# sed -n '13p' /etc/my.cnf
port = 3307
[root@mysql-db01 conf]# sed -n '13p' /etc/my.cnf
port = 3307
(3)重啟每個資料庫的服務
過程略
(4)將從庫mysql-db01和mysql-db03指向主庫mysql-db02進行同步
#mysql-db01和mysql-db03的操作步驟相同
mysql> stop slave; #停止從同步
Query OK, 0 rows affected (0.00 sec)
mysql> CHANGE MASTER TO MASTER_HOST='192.168.0.52', MASTER_PORT=3307, MASTER_AUTO_POSITION=1, MASTER_USER='rep', MASTER_PASSWORD='123123'; #授權同步資訊
Query OK, 0 rows affected, 2 warnings (0.01 sec)
mysql> start slave; #開始同步
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'slavee' at line 1
mysql> start slave;
Query OK, 0 rows affected, 1 warning (0.02 sec)
mysql> show slave status\G
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.0.52
Master_User: rep
Master_Port: 3307
Connect_Retry: 60
Master_Log_File: mysql-bin.000010
Read_Master_Log_Pos: 271
Relay_Log_File: mysql-db01-relay-bin.000002
Relay_Log_Pos: 361
Relay_Master_Log_File: mysql-bin.000010
Slave_IO_Running: Yes #同步成功
Slave_SQL_Running: Yes #同步成功
Replicate_Do_DB:
(5)修改mha配置檔案
[server default]
manager_log=/var/log/mha/mha1/manager
manager_workdir=/var/log/mha/mha1
master_binlog_dir=/usr/local/mysql/data
master_ip_failover_script=/usr/local/bin/master_ip_failover
password=123123
ping_interval=2
repl_password=123123
repl_user=rep
ssh_user=root
user=mha
[server1]
hostname=192.168.0.51
port=3307 #修改埠號
[server2]
hostname=192.168.0.52
port=3307 #修改埠號
[server3]
hostname=192.168.0.53
port=3307 #修改埠號
[binlog1]
no_master=1
hostname=192.168.0.53
master_binlog_dir=/data/mysql/binlog/
(6)啟動mysqlbinlog日誌備份的程序
[root@mysql-db03 binlog]# ps -ef | grep mysqlbinlog | grep -v grep
[root@mysql-db03 binlog]# mysqlbinlog -R --host=192.168.0.52 --port=3307 --user=mha --password=123123 --raw --stop-never mysql-bin.000001 &
[1] 24880
[root@mysql-db03 binlog]# ps -ef | grep mysqlbinlog | grep -v grep
root 24880 22198 0 01:38 pts/1 00:00:00 mysqlbinlog -R --host=192.168.0.52 --port=3307 --user=mha --password=x xxxx --raw --stop-never mysql-bin.000001
(7)啟動mha管理程序
[root@mysql-db03 conf]# ps -ef | grep perl | grep -v grep
[root@mysql-db03 conf]# nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/mha1/manager.log 2>&1 &
[1] 24895
[root@mysql-db03 conf]# ps -ef | grep perl | grep -v grep
root 24895 17795 3 01:41 pts/0 00:00:00 perl /usr/bin/masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover
(8)啟動Atlas服務
[root@mysql-db03 conf]# /usr/local/mysql-proxy/bin/mysql-proxyd test start
OK: MySQL-Proxy of test is started
[root@mysql-db03 conf]# ps -ef | grep mysql-proxy | grep -v grep
root 25005 1 0 01:43 ? 00:00:00 /usr/local/mysql-proxy/bin/mysql-proxy --defaults-file=/usr/local/mysql-proxy/conf/test.cnf
root 25006 25005 0 01:43 ? 00:00:00 /usr/local/mysql-proxy/bin/mysql-proxy --defaults-file=/usr/local/mysql-proxy/conf/test.cnf
[root@mysql-db03 conf]#
#說明:
#為何啟動服務需要加test,因為在Atlas配置檔案裡定義了一個例項名字為test
#Atlas實際是啟動了某個例項(當然也可以多例項)
[root@mysql-db03 conf]# netstat -antup | grep mysql-proxy
tcp 0 0 0.0.0.0:1234 0.0.0.0:* LISTEN 25006/mysql-proxy
tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 25006/mysql-proxy
#說明:
#監聽3306的為Atlas對外提供代理的埠;監聽1234是Atlas的管理監聽埠
8.6 登陸Atlas管理埠
[root@mysql-db03 conf]# mysql -uuser -ppwd -P1234 -h 192.168.0.53 #登陸Atlas管理端
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 1
Server version: 5.0.99-agent-admin
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; #看所有庫,報錯,並不讓看
ERROR 1105 (07000): use 'SELECT * FROM help' to see the supported commands
mysql> select * from help; #按提示輸入命令
+----------------------------+---------------------------------------------------------+
| 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_ndxs 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; #輸入上邊列表裡的命令,出現下表
+-------------+-------------------+-------+------+
| backend_ndx | address | state | type |
+-------------+-------------------+-------+------+
| 1 | 192.168.0.60:3307 | up | rw |
| 2 | 192.168.0.51:3307 | up | ro |
| 3 | 192.168.0.53:3307 | up | ro |
+-------------+-------------------+-------+------+
3 rows in set (0.00 sec)
這裡是平滑管理介面,可以在這裡根據選項修改設定
8.7 進行讀寫分離及讀負載均衡測試
(1)在mysql-db01和mysql-db03上的本地MySQL(3307埠)建立一個庫
#在mysql-db03上的本地3307埠的資料庫裡建立一個庫
[root@mysql-db03 binlog]# mysql -uroot -p123123 -P3307 #登陸本地MySQL
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 30
Server version: 5.6.17-log MySQL Community Server (GPL)
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;
+--------------------+
| Database |
+--------------------+
| information_schema |
| benet |
| mysql |
| performance_schema |
| test |
| yunjisuan |
+--------------------+
6 rows in set (0.00 sec)
mysql> create database db03; #建立一個庫db03
Query OK, 1 row affected (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| benet |
| db03 |
| mysql |
| performance_schema |
| test |
| yunjisuan |
+--------------------+
7 rows in set (0.00 sec)
#在mysql-db01上的本地3307埠的資料庫裡建立一個庫
[root@mysql-db01 ~]# mysql -uroot -p123123 -P3307
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 37
Server version: 5.6.17-log MySQL Community Server (GPL)
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;
+--------------------+
| Database |
+--------------------+
| information_schema |
| benet |
| mysql |
| performance_schema |
| test |
| yunjisuan |
+--------------------+
6 rows in set (0.00 sec)
mysql> create database db01;
Query OK, 1 row affected (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| benet |
| db01 |
| mysql |
| performance_schema |
| test |
| yunjisuan |
+--------------------+
7 rows in set (0.00 sec)
(2)登陸mysql-db02(主庫)進行檢視
[root@mysql-db02 ~]# mysql -uroot -p123123 -P3307
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 11
Server version: 5.6.17-log MySQL Community Server (GPL)
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;
+--------------------+
| Database |
+--------------------+
| information_schema |
| benet |
| mysql | #主庫192.168.0.52裡並沒有之前建立的db01或db03
| performance_schema |
| test |
| yunjisuan |
+--------------------+
6 rows in set (0.00 sec)
(3)在mysql-db03的本地登陸Atlas代理的3306埠
[root@mysql-db03 ~]# mysql -uroot -p123123 -h 192.168.0.53
由此可見,已經實現了讀負載均衡
(4)我們在mysql-db03的Atlas代理的MySQL服務端口裡進行寫入操作,測試讀寫分離
[root@mysql-db03 ~]# mysql -uroot -p123123 -h 192.168.0.53
由此可見,mysql-db01和mysql-db3的庫裡都出現了test20170910的庫。只有一個可能,資料是被寫入了主庫192.168.0.52裡,然後同步到的從庫。因此,讀寫分離測試完畢。