MySQL configuration of database Series F5 load balancing

The last article introduced F5 Configuration of virtual machine environment , Reference resources “ Database series F5 Load balancing configuration ”, Here we continue to introduce MySQL To configure F5 Load balancing .

2、F5 Configure load balancing

F5 Virtual machine configured 3 Network card , The information is as follows ：

1. VMnet2, Host only mode ,ip The address segment is 192.168.1.0, This will act as F5 Of external vlan Address
2. VMnet3, Host only mode ,ip The address segment is 192.168.198.0, This will act as F5 Of the management node ip Address
3. VMnet8,NAT Pattern ,ip The address segment is 192.168.112.0, Used for communication and bridging between virtual machines

2.1 To configure Platform

Initialize configuration , Enter the management node ip, To configure hostname

2.2 add to VLAN

Just add a few , Generally, two and one intranet will be added , An extranet

2.3 To configure Self-IP

Internal and external Each configuration 2 individual IP, One is floating IP

2.4 newly added monitor

F5 The default detection strategy is TCP The way ,F5 At regular intervals , Send a SYN Package to resource pool pool One of them member, Wait for the server to return SYN_ACK, Upon receipt of SYN_ACK after ,F5 Will use RST, Reset the connection . if F5 In a SYN After package , Not received within the specified time SYN_ACK, I think this is member Unavailable , No more to this member Allocate application traffic .TCP This method can only judge the target server tcp Whether the port is in listen state , Determine whether the target server has been established TCP The ability to connect , It can not be used to judge the availability of the application .

When the application is in a fake state ,Telnet The port can respond normally , But the application cannot provide services normally . Therefore, compatibility has been added MySQL Agreed monitor Detection mechanism , By connecting to mysql Library and execute SQL sentence “select 1” Return results 1 Is normal , If it fails to return normally, judge the member Unavailable .

2.5 establish pools

Create two pools, Add back-end services ip And port , Appoint monitor Test method , They are the default TCP Mode and compatibility mysql Protocol detection method .

2.6 establish Virtual Servers

establish virtual server, I.e. external service IP, and external VLAN In the same segment . At the same time, you need to configure the address forwarding setting to Auto Map, Appoint pool The name is MGR01 and MGR02.

2.7 Access service port

1） visit 192.168.1.200:3306

[[email protected] mysql]# ./bin/mysql -h192.168.1.200 -P3306 -uroot -p
Enter password: 

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
+--------------------+
11 rows in set (0.22 sec)

mysql>

2） visit 192.168.1.201:3306

[[email protected] mysql]# ./bin/mysql -h192.168.1.201 -P3306 -uroot -p
Enter password: 
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |

mysql>

2.8 View server traffic

The menu on the right ”Overview”->”Statistics”,Statistics Type Choose from ”Pools”, You can see the traffic of the corresponding server

3、F5 Load balancing policy test

1）MGR Configure multi write mode

mysql> SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------+-------------+--------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST    | MEMBER_PORT | MEMBER_STATE |
+---------------------------+--------------------------------------+----------------+-------------+--------------+
| group_replication_applier | be42da32-eb35-11ea-9505-000c2937f917 | tango-centos02 |        3306 | ONLINE       |
| group_replication_applier | de623c4b-eb35-11ea-b1e4-000c2959d3e3 | tango-centos03 |        3306 | ONLINE       |
| group_replication_applier | e5fb2194-eb27-11ea-b838-000c2992e812 | tango-centos01 |        3306 | ONLINE       |
+---------------------------+--------------------------------------+----------------+-------------+--------------+
3 rows in set (0.00 sec)

2） Use sysbench To test

[[email protected] sysbench]# sysbench ./tests/include/oltp_legacy/select.lua --mysql-host=192.168.1.201 --mysql-port=3306 --mysql-user=root --mysql-password=password --mysql-db=sbtest  --oltp-tables-count=5 --oltp-table-size=50000 --threads=100 --time=600 --report-interval=1 run
[ 6s ] thds: 100 tps: 725.29 qps: 725.29 (r/w/o: 725.29/0.00/0.00) lat (ms,95%): 144.97 err/s: 0.00 reconn/s: 0.00
[ 7s ] thds: 100 tps: 724.89 qps: 724.89 (r/w/o: 724.89/0.00/0.00) lat (ms,95%): 144.97 err/s: 0.00 reconn/s: 0.00
[ 8s ] thds: 100 tps: 732.12 qps: 732.12 (r/w/o: 732.12/0.00/0.00) lat (ms,95%): 144.97 err/s: 0.00 reconn/s: 0.00
[ 9s ] thds: 100 tps: 710.10 qps: 710.10 (r/w/o: 710.10/0.00/0.00) lat (ms,95%): 170.48 err/s: 0.00 reconn/s: 0.00
[ 10s ] thds: 100 tps: 745.56 qps: 745.56 (r/w/o: 745.56/0.00/0.00) lat (ms,95%): 153.02 err/s: 0.00 reconn/s: 0.00
[ 11s ] thds: 100 tps: 729.63 qps: 729.63 (r/w/o: 729.63/0.00/0.00) lat (ms,95%): 142.39 err/s: 0.00 reconn/s: 0.00
[ 12s ] thds: 100 tps: 730.20 qps: 730.20 (r/w/o: 730.20/0.00/0.00) lat (ms,95%): 144.97 err/s: 0.00 reconn/s: 0.00

3） Use the process of one of the nodes kill -19 command hang live , see F5 Traffic in

Because of the configuration MySQL agreement , When a process hang After living ,select 1 No normal return result ,F5 Will take this. member The status flag is unavailable , Traffic will not flow To this member.

---

Reference material ：

1. https://blog.csdn.net/weixin_37569048/article/details/100053487
2. https://blog.csdn.net/qq_35611533/article/details/51917279
3. https://blog.csdn.net/solihawk/article/details/120315419

---

Reprint please indicate the original address ：https://blog.csdn.net/solihawk/article/details/120321153
The article will be synchronized in the official account. “ Shepherd's direction ” to update , Interested can pay attention to the official account , thank you ！