corosync+pacemaker实现高可用的MariaDB
一、准备工作承接上文：corosync+pacemaker使用crmsh构建高可用集群
二、MariaDB server配置（基于nfs）
nfs server准备
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
1、在nfs server准备LVM存储空间
# fdisk /dev/sdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x61284c6a.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
switch off the mode (command 'c') and change display units to
sectors (command 'u').
Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 3
First cylinder (1-1305, default 1):
Using default value 1
Last cylinder, +cylinders or +size{K,M,G} (1-1305, default 1305): +10G
Value out of range.
Last cylinder, +cylinders or +size{K,M,G} (1-1305, default 1305): +5G
Command (m for help): t
Selected partition 3
Hex code (type L to list codes): 8e
Changed system type of partition 3 to 8e (Linux LVM)
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
# partx -a /dev/sdb
# pvcreate /dev/sdb3
Physical volume "/dev/sdb3" successfully created
# vgcreate myvg /dev/sdb3
Volume group "myvg" successfully created
# lvcreate -L 5G -n mydata myvg
Logical volume "mydata" created.
# mke2fs -t ext4 /dev/myvg/mydata
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
327680 inodes, 1310720 blocks
65536 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=1342177280
40 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
This filesystem will be automatically checked every 36 mounts or
180 days, whichever comes first.Use tune2fs -c or -i to override.
2、开机自动挂载，并nfs导出
# mkdir/mydata
# vim /etc/fstab
/dev/myvg/mydata /mydata ext4 defaults 0 0
# mount -a
# mount | grep /mydata
/dev/mapper/myvg-mydata on /mydata type ext4 (rw)
# vim /etc/exports
/mydata 192.168.0.0/24(rw,no_root_squash)
#共享给192.168.0.0/24网段，可读可写，允许root用户登录便于初始化，配置结束可取消root用户登录
3、导出nfs共享目录
#创建mysql用户，指明uid，gid。各节点的mysql用户uid，gid一致。
# groupadd -r -g 306 mysql
# useradd -r -g 306 -u 306 mysql
#创建共享目录，并修改属主属组。
# mkdir /mydata/data
# chown -R mysql.mysql /mydata/data
#导出nfs共享目录
# exportfs -arv
exporting 192.168.0.0/24:/mydata
# service nfs start
三、各节点准备mysql
node1
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
创建mysql用户，uid和gid与nfs server的mysql用户保持一致
# groupadd -r -g 306 mysql
# useradd -r -g 306 -u 306 mysql
安装mariadb
# tar xf mariadb-5.5.46-linux-x86_64.tar.gz -C /usr/local/
# cd /usr/local
# ln -sv mariadb-5.5.46-linux-x86_64 mysql
`mysql' -> `mariadb-5.5.46-linux-x86_64'
# cd mysql/
# chown -R root.mysql ./*
挂载nfs文件系统
# mount -t nfs 192.168.0.20:/mydata /mydata
# mount | grep /mydata
192.168.0.20:/mydata on /mydata type nfs (rw,vers=4,addr=192.168.0.20,clientaddr=192.168.0.15)
初始化mysql至nfs，此步骤只需一个节点操作即可，本文node1执行，那么node2就不需要执行
初始化操作后，可以将nfs server的共享选项中的no_root_squash移除了
# ./scripts/mysql_install_db --datadir=/mydata/data/ --user=mysql
nfs server端查看
# cd /mydata/data
# ll
total 32
-rw-rw---- 1 mysql mysql 16384 Nov 21 20:32 aria_log.00000001
-rw-rw---- 1 mysql mysql 52 Nov 21 20:32 aria_log_control
drwx------ 2 mysql root 4096 Nov 21 20:32 mysql
drwx------ 2 mysql mysql4096 Nov 21 20:32 performance_schema
drwx------ 2 mysql root 4096 Nov 21 20:32 test
node1节点配置mysql
# mkdir /etc/mysql
# cp support-files/my-large.cnf /etc/mysql/my.cnf
# vim /etc/mysql/my.cnf
datadir = /mydata/data
innodb_file_per_table = on
skip_name_resolve = on
为mysql提供服务脚本，并禁止其开机启动
# cp support-files/mysql.server /etc/rc.d/init.d/mysqld
# chkconfig --add mysqld
# chkconfig mysqld off
启动mysql，创建mydb数据库
# service mysqld start
Starting MySQL..... SUCCESS!
# vim /root/.bashrc
PATH=/usr/local/mysql/bin:$PATH
export PATH
# source /root/.bashrc
# mysql
Welcome to the MariaDB monitor.Commands end with ; or \g.
Your MariaDB connection id is 2
Server version: 5.5.46-MariaDB-log MariaDB Server
Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]> create database mydb;
Query OK, 1 row affected (0.16 sec)
MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.03 sec)
MariaDB [(none)]> exit
Bye
# service mysqld stop
Shutting down MySQL.. SUCCESS!
卸载共享目录
# umount /mydata
node2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
# groupadd -r -g 306 mysql
# useradd -r -g 306 -u 306 mysql
# tar xf mariadb-5.5.46-linux-x86_64.tar.gz -C /usr/local
# cd /usr/local/
# ln -sv mariadb-5.5.46-linux-x86_64 mysql
`mysql' -> `mariadb-5.5.46-linux-x86_64'
# cd mysql/
# chownroot.mysql ./*
将node1的配置文件复制给node2
# mkdir /etc/mysql/
# scp /etc/mysql/my.cnf node2:/etc/mysql/
为node2节点准备服务脚本，并禁止开机启动
# cp support-files/mysql.server /etc/rc.d/init.d/mysqld
# chkconfig --add mysqld
# chkconfig mysqld off
挂在共享文件系统，启动mysql
# mkdir /mydata
# mount -t nfs 192.168.0.20:/mydata /mydata
# service mysqld start
Starting MySQL.. SUCCESS!
# vim /root/.bashrc
PATH=/usr/local/mysql/bin:$PATH
export PATH
# source /root/.bashrc
MariaDB [(none)]> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mydb |
| mysql |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.02 sec)
授权远程访问
MariaDB [(none)]> grant all on *.* to 'root'@'192.168.%.%' identified by 'jymlinux';
Query OK, 0 rows affected (0.03 sec)
MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.01 sec)
MariaDB [(none)]> exit
Bye
停止mysql，并卸载共享目录
# service mysqld stop
Shutting down MySQL.. SUCCESS!
# umount /mydata
四、使用crmsh配置mariadb高可用
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
# crm
crm(live)# cd configure
crm(live)configure# primitive myip ocf:heartbeat:IPaddr params ip=192.168.0.17 nic=eth0 cidr_netmask=24 op monitor interval=10s timeout=20s
crm(live)configure# verify
crm(live)configure# commit
crm(live)configure# primitive mystore ocf:heartbeat:Filesystem params device=192.168.0.20:/mydata/data directory=/mydata fstype=nfs
crm(live)configure# verify
WARNING: mystore: default timeout 20s for start is smaller than the advised 60
WARNING: mystore: default timeout 20s for stop is smaller than the advised 60
crm(live)configure# commit
WARNING: mystore: default timeout 20s for start is smaller than the advised 60
WARNING: mystore: default timeout 20s for stop is smaller than the advised 60
crm(live)configure# primitive myserver ocf:heartbeat:mysql params binary="/usr/local/mysql/bin/mysqld_safe" config="/etc/mysql/my.cnf" datadir="/mydata/data"op start timeout=120s op stop timeout=120s op monitor interval=20s timeout=30s
crm(live)configure# verify
crm(live)configure# commit
定义组资源
crm(live)configure# group myservice myip mystore myserver
页:
[1]