澳门新萄京ProxySQL初体验
分类:数据库

 

Preface

 

    As we all know,it's a common sense that separate reading and writing operations can immensely increse the performance of MySQL database.Especially the query operations by executing select statement relevant with large tables.Therefore,we usually choose a proxy tool to deal with it.There're a lot of tools can be used nowadays such as mycat(by Apache),dble(based on mycat by Action),atlas,dbproxy(based on atlas of Qihoo360 by MeituanDianping),cetus(by NetEase) and so forth.I'm not going to compare who's the better tool to use.I'm just prefer to having a test on another popular tool which is called "ProxySQL".

 

Introduce

 

    ProxySQL is a low-weight proxy tool based on a SQLite database.It provids hight performance espcially in high concurrent environment what we can see below(compared with the MaxScale).

 

澳门新萄京 1

 

    

*    The configuration of ProxySQL is a three-layer structure:*

 

澳门新萄京 2

 

  *  We usually conifuge the parameter in layer of memory,and then load them into layer of runtime to make it take effect.In the end,we should save them to disk for durability storage.It also provides some simple syntax to transfer configurations between those layers as below:*

 

  • LOAD MYSQL object FROM MEMORY or LOAD MYSQL object TO RUNTIME 
  • SAVE MYSQL object TO MEMORY or SAVE MYSQL object FROM RUNTIME 
  • LOAD MYSQL object TO MEMORY or LOAD MYSQL object FROM DISK 
  • SAVE MYSQL object FROM MEMORY or SAVE MYSQL object TO DISK 
  • LOAD MYSQL object FROM CONFIG

 

The comparison with other popular middleware tools.

 

Official website:

http://www.proxysql.com/

 

Github websit:

https://github.com/sysown/proxysql/releases/

 

Percona websit:

 

Procedure

 

1. Installation

 

Download and install ProxySQL in rpm mode on node zlm2.

 1 [root@zlm2 08:00:34 ~]
 2 #wget https://github.com/sysown/proxysql/releases/download/v1.4.10/proxysql-1.4.10-1-centos7.x86_64.rpm
 3 --2018-08-10 08:01:20--  https://github.com/sysown/proxysql/releases/download/v1.4.10/proxysql-1.4.10-1-centos7.x86_64.rpm
 4 Resolving github.com (github.com)... 13.229.188.59, 52.74.223.119, 13.250.177.223
 5 Connecting to github.com (github.com)|13.229.188.59|:443... connected.
 6 HTTP request sent, awaiting response... 302 Found
 7 Location: https://github-production-release-asset-2e65be.s3.amazonaws.com/27358084/305d1618-9a5b-11e8-9b04-df8e3393a6b4?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A/20180810/us-east-1/s3/aws4_request&X-Amz-Date=20180810T060119Z&X-Amz-Expires=300&X-Amz-Signature=f4f676653d4cd4f34f4b75b2a4e7dfeaee8bf9d8e35dc91938f41961123a9c9f&X-Amz-SignedHeaders=host&actor_id=0&response-content-disposition=attachment; filename=proxysql-1.4.10-1-centos7.x86_64.rpm&response-content-type=application/octet-stream [following]
 8 --2018-08-10 08:01:29--  https://github-production-release-asset-2e65be.s3.amazonaws.com/27358084/305d1618-9a5b-11e8-9b04-df8e3393a6b4?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A/20180810/us-east-1/s3/aws4_request&X-Amz-Date=20180810T060119Z&X-Amz-Expires=300&X-Amz-Signature=f4f676653d4cd4f34f4b75b2a4e7dfeaee8bf9d8e35dc91938f41961123a9c9f&X-Amz-SignedHeaders=host&actor_id=0&response-content-disposition=attachment; filename=proxysql-1.4.10-1-centos7.x86_64.rpm&response-content-type=application/octet-stream
 9 Resolving github-production-release-asset-2e65be.s3.amazonaws.com (github-production-release-asset-2e65be.s3.amazonaws.com)... 54.231.32.91
10 Connecting to github-production-release-asset-2e65be.s3.amazonaws.com (github-production-release-asset-2e65be.s3.amazonaws.com)|54.231.32.91|:443... connected.
11 HTTP request sent, awaiting response... 200 OK
12 Length: 5982016 (5.7M) [application/octet-stream]
13 Saving to: ‘proxysql-1.4.10-1-centos7.x86_64.rpm’
14 
15 100%[===========================================================================================================>] 5,982,016   1.12MB/s   in 12s    
16 
17 2018-08-10 08:02:14 (472 KB/s) - ‘proxysql-1.4.10-1-centos7.x86_64.rpm’ saved [5982016/5982016]
18 
19 
20 [root@zlm2 08:02:14 ~]
21 #ls -l|grep proxysql
22 -rw-r--r--   1 root root    5982016 Aug  7 15:03 proxysql-1.4.10-1-centos7.x86_64.rpm
23 
24 [root@zlm2 08:04:48 ~]
25 #yum -y localinstall proxysql-1.4.10-1-centos7.x86_64.rpm
26 Loaded plugins: fastestmirror
27 Examining proxysql-1.4.10-1-centos7.x86_64.rpm: proxysql-1.4.10-1.x86_64
28 Marking proxysql-1.4.10-1-centos7.x86_64.rpm to be installed
29 Resolving Dependencies
30 --> Running transaction check
31 ---> Package proxysql.x86_64 0:1.4.10-1 will be installed
32 --> Finished Dependency Resolution
33 
34 Dependencies Resolved
35 
36 =====================================================================================================================================================
37  Package                      Arch                       Version                         Repository                                             Size
38 =====================================================================================================================================================
39 Installing:
40  proxysql                     x86_64                     1.4.10-1                        /proxysql-1.4.10-1-centos7.x86_64                      22 M
41 
42 Transaction Summary
43 =====================================================================================================================================================
44 Install  1 Package
45 
46 Total size: 22 M
47 Installed size: 22 M
48 Downloading packages:
49 Running transaction check
50 Running transaction test
51 Transaction test succeeded
52 Running transaction
53   Installing : proxysql-1.4.10-1.x86_64                                                                                                          1/1 
54   Verifying  : proxysql-1.4.10-1.x86_64                                                                                                          1/1 
55 
56 Installed:
57   proxysql.x86_64 0:1.4.10-1                                                                                                                         
58 
59 Complete!

澳门新萄京ProxySQL初体验。 

Check the default configuration file.

  1 [root@zlm2 08:05:09 ~]
  2 #rpm -ql proxysql
  3 /etc/init.d/proxysql
  4 /etc/proxysql.cnf //This is the configuration file of ProxySQL.
  5 /usr/bin/proxysql
  6 /usr/share/proxysql/tools/proxysql_galera_checker.sh //This is the script to check the status of hostgroups.
  7 /usr/share/proxysql/tools/proxysql_galera_writer.pl
  8 
  9 [root@zlm2 08:08:13 ~]
 10 #cat /etc/proxysql.cnf
 11 #file proxysql.cfg
 12 
 13 ########################################################################################
 14 # This config file is parsed using libconfig , and its grammar is described in:        
 15 # http://www.hyperrealm.com/libconfig/libconfig_manual.html#Configuration-File-Grammar 
 16 # Grammar is also copied at the end of this file                                       
 17 ########################################################################################
 18 
 19 ########################################################################################
 20 # IMPORTANT INFORMATION REGARDING THIS CONFIGURATION FILE:                             
 21 ########################################################################################
 22 # On startup, ProxySQL reads its config file (if present) to determine its datadir. 
 23 # What happens next depends on if the database file (disk) is present in the defined
 24 # datadir (i.e. "/var/lib/proxysql/proxysql.db").
 25 #
 26 # If the database file is found, ProxySQL initializes its in-memory configuration from 
 27 # the persisted on-disk database. So, disk configuration gets loaded into memory and 
 28 # then propagated towards the runtime configuration. 
 29 #
 30 # If the database file is not found and a config file exists, the config file is parsed 
 31 # and its content is loaded into the in-memory database, to then be both saved on-disk 
 32 # database and loaded at runtime.
 33 #
 34 # IMPORTANT: If a database file is found, the config file is NOT parsed. In this case
 35 #            ProxySQL initializes its in-memory configuration from the persisted on-disk
 36 #            database ONLY. In other words, the configuration found in the proxysql.cnf
 37 #            file is only used to initial the on-disk database read on the first startup.
 38 #
 39 # In order to FORCE a re-initialise of the on-disk database from the configuration file 
 40 # the ProxySQL service should be started with "service proxysql initial".
 41 #
 42 ########################################################################################
 43 
 44 datadir="/var/lib/proxysql" //This is the position of SQLite database of ProxySQL.
 45 
 46 admin_variables=
 47 {
 48     admin_credentials="admin:admin" //The default user/password is admin/admin.
 49 #    mysql_ifaces="127.0.0.1:6032;/tmp/proxysql_admin.sock"
 50     mysql_ifaces="0.0.0.0:6032" //The default admin port is 6032.
 51 #    refresh_interval=2000
 52 #    debug=true
 53 }
 54 
 55 mysql_variables=
 56 {
 57     threads=4
 58     max_connections=2048
 59     default_query_delay=0
 60     default_query_timeout=36000000
 61     have_compress=true
 62     poll_timeout=2000
 63 #    interfaces="0.0.0.0:6033;/tmp/proxysql.sock"
 64     interfaces="0.0.0.0:6033" //The default service port is 6033.
 65     default_schema="information_schema"
 66     stacksize=1048576
 67     server_version="5.5.30"
 68     connect_timeout_server=3000
 69 # make sure to configure monitor username and password
 70 # https://github.com/sysown/proxysql/wiki/Global-variables#mysql-monitor_username-mysql-monitor_password
 71     monitor_username="monitor"
 72     monitor_password="monitor"
 73     monitor_history=600000
 74     monitor_connect_interval=60000
 75     monitor_ping_interval=10000
 76     monitor_read_only_interval=1500
 77     monitor_read_only_timeout=500
 78     ping_interval_server_msec=120000
 79     ping_timeout_server=500
 80     commands_stats=true
 81     sessions_sort=true
 82     connect_retries_on_failure=10
 83 }
 84 
 85 
 86 # defines all the MySQL servers
 87 mysql_servers =
 88 (
 89 #    {
 90 #        address = "127.0.0.1" # no default, required . If port is 0 , address is interpred as a Unix Socket Domain
 91 #        port = 3306           # no default, required . If port is 0 , address is interpred as a Unix Socket Domain
 92 #        hostgroup = 0            # no default, required
 93 #        status = "ONLINE"     # default: ONLINE
 94 #        weight = 1            # default: 1
 95 #        compression = 0       # default: 0
 96 #   max_replication_lag = 10  # default 0 . If greater than 0 and replication lag passes such threshold, the server is shunned
 97 #    },
 98 #    {
 99 #        address = "/var/lib/mysql/mysql.sock"
100 #        port = 0
101 #        hostgroup = 0
102 #    },
103 #    {
104 #        address="127.0.0.1"
105 #        port=21891
106 #        hostgroup=0
107 #        max_connections=200
108 #    },
109 #    { address="127.0.0.2" , port=3306 , hostgroup=0, max_connections=5 },
110 #    { address="127.0.0.1" , port=21892 , hostgroup=1 },
111 #    { address="127.0.0.1" , port=21893 , hostgroup=1 }
112 #    { address="127.0.0.2" , port=3306 , hostgroup=1 },
113 #    { address="127.0.0.3" , port=3306 , hostgroup=1 },
114 #    { address="127.0.0.4" , port=3306 , hostgroup=1 },
115 #    { address="/var/lib/mysql/mysql.sock" , port=0 , hostgroup=1 }
116 )
117 
118 
119 # defines all the MySQL users
120 mysql_users:
121 (
122 #    {
123 #        username = "username" # no default , required
124 #        password = "password" # default: ''
125 #        default_hostgroup = 0 # default: 0
126 #        active = 1            # default: 1
127 #    },
128 #    {
129 #        username = "root"
130 #        password = ""
131 #        default_hostgroup = 0
132 #        max_connections=1000
133 #        default_schema="test"
134 #        active = 1
135 #    },
136 #    { username = "user1" , password = "password" , default_hostgroup = 0 , active = 0 }
137 )
138 
139 
140 
141 #defines MySQL Query Rules
142 mysql_query_rules:
143 (
144 #    {
145 #        rule_id=1
146 #        active=1
147 #        match_pattern="^SELECT .* FOR UPDATE$"
148 #        destination_hostgroup=0
149 #        apply=1
150 #    },
151 #    {
152 #        rule_id=2
153 #        active=1
154 #        match_pattern="^SELECT"
155 #        destination_hostgroup=1
156 #        apply=1
157 #    }
158 )
159 
160 scheduler=
161 (
162 #  {
163 #    id=1
164 #    active=0
165 #    interval_ms=10000
166 #    filename="/var/lib/proxysql/proxysql_galera_checker.sh"
167 #    arg1="0"
168 #    arg2="0"
169 #    arg3="0"
170 #    arg4="1"
171 #    arg5="/var/lib/proxysql/proxysql_galera_checker.log"
172 #  }
173 )
174 
175 
176 mysql_replication_hostgroups=
177 (
178 #        {
179 #                writer_hostgroup=30
180 #                reader_hostgroup=40
181 #                comment="test repl 1"
182 #       },
183 #       {
184 #                writer_hostgroup=50
185 #                reader_hostgroup=60
186 #                comment="test repl 2"
187 #        }
188 )
189 
190 
191 
192 
193 # http://www.hyperrealm.com/libconfig/libconfig_manual.html#Configuration-File-Grammar
194 #
195 # Below is the BNF grammar for configuration files. Comments and include directives are not part of the grammar, so they are not included here. 
196 #
197 # configuration = setting-list | empty
198 #
199 # setting-list = setting | setting-list setting
200 #     
201 # setting = name (":" | "=") value (";" | "," | empty)
202 #     
203 # value = scalar-value | array | list | group
204 #     
205 # value-list = value | value-list "," value
206 #     
207 # scalar-value = boolean | integer | integer64 | hex | hex64 | float
208 #                | string
209 #     
210 # scalar-value-list = scalar-value | scalar-value-list "," scalar-value
211 #     
212 # array = "[" (scalar-value-list | empty) "]"
213 #     
214 # list = "(" (value-list | empty) ")"
215 #     
216 # group = "{" (setting-list | empty) "}"
217 #     
218 # empty =

 

Start ProxySQL and check tables of it.

  1 [root@zlm2 08:30:12 ~]
  2 #service proxysql start
  3 Starting ProxySQL: 2018-08-10 08:30:38 [INFO] Using config file /etc/proxysql.cnf
  4 DONE!
  5 
  6 [root@zlm2 08:30:38 ~]
  7 #ps aux|grep proxysql
  8 root      4307  0.0  0.5  58688  5184 ?        S    08:30   0:00 proxysql -c /etc/proxysql.cnf -D /var/lib/proxysql
  9 root      4308  0.3  1.8 102612 19020 ?        Sl   08:30   0:00 proxysql -c /etc/proxysql.cnf -D /var/lib/proxysql
 10 root      4335  0.0  0.0 112640   960 pts/0    R    08:30   0:00 grep --color=auto proxysql
 11 
 12 [root@zlm2 08:32:20 ~]
 13 #cd /var/lib/proxysql
 14 
 15 [root@zlm2 08:33:55 /var/lib/proxysql]
 16 #ls -l
 17 total 244
 18 -rw------- 1 root root 122880 Aug 10 08:16 proxysql.db
 19 -rw------- 1 root root   7320 Aug 10 08:30 proxysql.log
 20 -rw-r--r-- 1 root root      5 Aug 10 08:30 proxysql.pid
 21 -rw------- 1 root root 110592 Aug 10 08:33 proxysql_stats.db
 22 -rw-r--r-- 1 root root      2 Aug 10 08:29 reload
 23 
 24 [root@zlm2 08:33:57 /var/lib/proxysql]
 25 #mysql -uadmin -padmin -h127.0.0.1 -P6032
 26 mysql: [Warning] Using a password on the command line interface can be insecure.
 27 Welcome to the MySQL monitor.  Commands end with ; or g.
 28 Your MySQL connection id is 1
 29 Server version: 5.5.30 (ProxySQL Admin Module)
 30 
 31 Copyright (c) 2009-2018 Percona LLC and/or its affiliates
 32 Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
 33 
 34 Oracle is a registered trademark of Oracle Corporation and/or its
 35 affiliates. Other names may be trademarks of their respective
 36 owners.
 37 
 38 Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
 39 
 40 (admin@127.0.0.1 6032)[(none)]>show databases;
 41  ----- --------------- ------------------------------------- 
 42 | seq | name          | file                                |
 43  ----- --------------- ------------------------------------- 
 44 | 0   | main          |                                     |
 45 | 2   | disk          | /var/lib/proxysql/proxysql.db       |
 46 | 3   | stats         |                                     |
 47 | 4   | monitor       |                                     |
 48 | 5   | stats_history | /var/lib/proxysql/proxysql_stats.db |
 49  ----- --------------- ------------------------------------- 
 50 5 rows in set (0.00 sec)
 51 
 52 //There's five databases in all in PorxySQL database.In the previous version,there's no stats_history database;
 53 
 54 (admin@127.0.0.1 6032)[(none)]>show tables from main;
 55  -------------------------------------------- 
 56 | tables                                     |
 57  -------------------------------------------- 
 58 | global_variables                           | //It contains all the variables of ProxySQL.
 59 | mysql_collations                           |
 60 | mysql_group_replication_hostgroups         |
 61 | mysql_query_rules                          | //It contains all the query rules we'd like to use.
 62 | mysql_query_rules_fast_routing             |
 63 | mysql_replication_hostgroups               |
 64 | mysql_servers                              | //It contains the information of all servers relevant with MySQL.
 65 | mysql_users                                | //It contains the information of all users relevant with MySQL.
 66 | proxysql_servers                           | //It contains the information of all servers relevant with ProxySQL.
 67 | runtime_checksums_values                   |
 68 | runtime_global_variables                   |
 69 | runtime_mysql_group_replication_hostgroups |
 70 | runtime_mysql_query_rules                  |
 71 | runtime_mysql_query_rules_fast_routing     |
 72 | runtime_mysql_replication_hostgroups       |
 73 | runtime_mysql_servers                      |
 74 | runtime_mysql_users                        |
 75 | runtime_proxysql_servers                   |
 76 | runtime_scheduler                          |
 77 | scheduler                                  |
 78  -------------------------------------------- 
 79 20 rows in set (0.00 sec)
 80 
 81 //All the "runtime" prefixed tables in "main" database contain the current configuration in runtime mode.The other tables can be modified in memory mode.
 82 
 83 (admin@127.0.0.1 6032)[(none)]>show tables from disk;
 84  ------------------------------------ 
 85 | tables                             |
 86  ------------------------------------ 
 87 | global_variables                   |
 88 | mysql_collations                   |
 89 | mysql_group_replication_hostgroups |
 90 | mysql_query_rules                  |
 91 | mysql_query_rules_fast_routing     |
 92 | mysql_replication_hostgroups       |
 93 | mysql_servers                      |
 94 | mysql_users                        |
 95 | proxysql_servers                   |
 96 | scheduler                          |
 97  ------------------------------------ 
 98 10 rows in set (0.00 sec)
 99 
100 //All the tables contains the relevant data which we have saved in disk by "SAVE MYSQL xxx TO DISK;" command.
101 //All the tables have the the same structure as those in "main" database.
102 
103 (admin@127.0.0.1 6032)[(none)]>show tables from monitor;
104  ------------------------------------ 
105 | tables                             |
106  ------------------------------------ 
107 | mysql_server_connect_log           |
108 | mysql_server_group_replication_log |
109 | mysql_server_ping_log              |
110 | mysql_server_read_only_log         |
111 | mysql_server_replication_lag_log   |
112  ------------------------------------ 
113 5 rows in set (0.00 sec)
114 
115 (admin@127.0.0.1 6032)[(none)]>show tables from stats;
116  -------------------------------------- 
117 | tables                               |
118  -------------------------------------- 
119 | global_variables                     |
120 | stats_memory_metrics                 |
121 | stats_mysql_commands_counters        |
122 | stats_mysql_connection_pool          |
123 | stats_mysql_connection_pool_reset    |
124 | stats_mysql_global                   |
125 | stats_mysql_prepared_statements_info |
126 | stats_mysql_processlist              |
127 | stats_mysql_query_digest             |
128 | stats_mysql_query_digest_reset       |
129 | stats_mysql_query_rules              |
130 | stats_mysql_users                    |
131 | stats_proxysql_servers_checksums     |
132 | stats_proxysql_servers_metrics       |
133 | stats_proxysql_servers_status        |
134  -------------------------------------- 
135 15 rows in set (0.00 sec)

 

2. Configure the separation of reading and writing.

 

Configure the hostgroup id.

 1 (admin@127.0.0.1 6032)[main]>show create table mysql_replication_hostgroupsG
 2 *************************** 1. row ***************************
 3        table: mysql_replication_hostgroups
 4 Create Table: CREATE TABLE mysql_replication_hostgroups (
 5     writer_hostgroup INT CHECK (writer_hostgroup>=0) NOT NULL PRIMARY KEY,
 6     reader_hostgroup INT NOT NULL CHECK (reader_hostgroup<>writer_hostgroup AND reader_hostgroup>0),
 7     comment VARCHAR NOT NULL DEFAULT '', UNIQUE (reader_hostgroup))
 8 1 row in set (0.00 sec)
 9 
10 (admin@127.0.0.1 6032)[main]>insert into mysql_replication_hostgroups(writer_hostgroup,reader_hostgroup,comment) values(10,20,'Test of ProxySQL');
11 Query OK, 1 row affected (0.00 sec)
12 
13 (admin@127.0.0.1 6032)[main]>select * from mysql_replication_hostgroups;
14  ------------------ ------------------ ------------------ 
15 | writer_hostgroup | reader_hostgroup | comment          |
16  ------------------ ------------------ ------------------ 
17 | 10               | 20               | Test of ProxySQL |
18  ------------------ ------------------ ------------------ 
19 1 row in set (0.00 sec)
20 
21 (admin@127.0.0.1 6032)[main]>select * from main.runtime_mysql_replication_hostgroups;
22 Empty set (0.00 sec)
23 
24 (admin@127.0.0.1 6032)[main]>select * from disk.mysql_replication_hostgroups;
25 Empty set (0.00 sec)
26 
27 (admin@127.0.0.1 6032)[main]>load mysql servers to runtime;save mysql servers to disk;
28 Query OK, 0 rows affected (0.00 sec)
29 
30 Query OK, 0 rows affected (0.04 sec)
31 
32 (admin@127.0.0.1 6032)[main]>select * from main.runtime_mysql_replication_hostgroups;
33  ------------------ ------------------ ------------------ 
34 | writer_hostgroup | reader_hostgroup | comment          |
35  ------------------ ------------------ ------------------ 
36 | 10               | 20               | Test of ProxySQL |
37  ------------------ ------------------ ------------------ 
38 1 row in set (0.00 sec)
39 
40 (admin@127.0.0.1 6032)[main]>select * from disk.mysql_replication_hostgroups;
41  ------------------ ------------------ ------------------ 
42 | writer_hostgroup | reader_hostgroup | comment          |
43  ------------------ ------------------ ------------------ 
44 | 10               | 20               | Test of ProxySQL |
45  ------------------ ------------------ ------------------ 
46 1 row in set (0.00 sec)

 

Configure the MySQL servers in different hostgroup.

 1 (admin@127.0.0.1 6032)[main]>show create table mysql_serversG
 2 *************************** 1. row ***************************
 3        table: mysql_servers
 4 Create Table: CREATE TABLE mysql_servers (
 5     hostgroup_id INT CHECK (hostgroup_id>=0) NOT NULL DEFAULT 0,
 6     hostname VARCHAR NOT NULL,
 7     port INT NOT NULL DEFAULT 3306,
 8     status VARCHAR CHECK (UPPER(status) IN ('ONLINE','SHUNNED','OFFLINE_SOFT', 'OFFLINE_HARD')) NOT NULL DEFAULT 'ONLINE',
 9     weight INT CHECK (weight >= 0) NOT NULL DEFAULT 1,
10     compression INT CHECK (compression >=0 AND compression <= 102400) NOT NULL DEFAULT 0,
11     max_connections INT CHECK (max_connections >=0) NOT NULL DEFAULT 1000,
12     max_replication_lag INT CHECK (max_replication_lag >= 0 AND max_replication_lag <= 126144000) NOT NULL DEFAULT 0,
13     use_ssl INT CHECK (use_ssl IN(0,1)) NOT NULL DEFAULT 0,
14     max_latency_ms INT UNSIGNED CHECK (max_latency_ms>=0) NOT NULL DEFAULT 0,
15     comment VARCHAR NOT NULL DEFAULT '',
16     PRIMARY KEY (hostgroup_id, hostname, port) )
17 1 row in set (0.00 sec)
18 
19 (admin@127.0.0.1 6032)[main]>insert into mysql_servers(hostgrop_id,hostname,port,max_connections,max_replication_lag,max_latency_ms) values(10,'192.168.1.101',3308,50,10,1000),(20,'192.168.1.102',3308,50,10,1000),(20,'192.168.1.103',3308,50,10,1000);
20 Query OK, 3 row affected (0.01 sec)
21 
22 (admin@127.0.0.1 6032)[main]>select * from mysql_servers;
23  -------------- --------------- ------ -------- -------- ------------- ----------------- --------------------- --------- ---------------- --------- 
24 | hostgroup_id | hostname      | port | status | weight | compression | max_connections | max_replication_lag | use_ssl | max_latency_ms | comment |
25  -------------- --------------- ------ -------- -------- ------------- ----------------- --------------------- --------- ---------------- --------- 
26 | 10           | 192.168.1.101 | 3308 | ONLINE | 1      | 0           | 50              | 10                  | 0       | 1000           |         |
27 | 20           | 191.168.1.102 | 3308 | ONLINE | 1      | 0           | 50              | 10                  | 0       | 1000           |         |
28 | 20           | 192.168.1.103 | 3308 | ONLINE | 1      | 0           | 50              | 10                  | 0       | 1000           |         |
29  -------------- --------------- ------ -------- -------- ------------- ----------------- --------------------- --------- ---------------- --------- 
30 3 rows in set (0.00 sec)
31 
32 (admin@127.0.0.1 6032)[main]>select * from runtime_mysql_servers;
33 Empty set (0.00 sec)
34 
35 (admin@127.0.0.1 6032)[main]>select * from disk.mysql_servers;
36 Empty set (0.00 sec)
37 
38 (admin@127.0.0.1 6032)[main]>load mysql servers to runtime;save mysql servers to disk;
39 Query OK, 0 rows affected (0.01 sec)
40 
41 Query OK, 0 rows affected (0.03 sec)
42 
43 (admin@127.0.0.1 6032)[main]>select * from runtime_mysql_servers;
44  -------------- --------------- ------ --------- -------- ------------- ----------------- --------------------- --------- ---------------- --------- 
45 | hostgroup_id | hostname      | port | status  | weight | compression | max_connections | max_replication_lag | use_ssl | max_latency_ms | comment |
46  -------------- --------------- ------ --------- -------- ------------- ----------------- --------------------- --------- ---------------- --------- 
47 | 20           | 191.168.1.102 | 3308 | SHUNNED | 1      | 0           | 50              | 10                  | 0       | 1000           |         |
48 | 20           | 192.168.1.101 | 3308 | ONLINE  | 1      | 0           | 50              | 10                  | 0       | 1000           |         |
49 | 20           | 192.168.1.103 | 3308 | ONLINE  | 1      | 0           | 50              | 10                  | 0       | 1000           |         |
50  -------------- --------------- ------ --------- -------- ------------- ----------------- --------------------- --------- ---------------- --------- 
51 3 rows in set (0.00 sec)
52 
53 (admin@127.0.0.1 6032)[main]>select * from disk.mysql_servers;
54  -------------- --------------- ------ -------- -------- ------------- ----------------- --------------------- --------- ---------------- --------- 
55 | hostgroup_id | hostname      | port | status | weight | compression | max_connections | max_replication_lag | use_ssl | max_latency_ms | comment |
56  -------------- --------------- ------ -------- -------- ------------- ----------------- --------------------- --------- ---------------- --------- 
57 | 10           | 192.168.1.101 | 3308 | ONLINE | 1      | 0           | 50              | 10                  | 0       | 1000           |         |
58 | 20           | 191.168.1.102 | 3308 | ONLINE | 1      | 0           | 50              | 10                  | 0       | 1000           |         |
59 | 20           | 192.168.1.103 | 3308 | ONLINE | 1      | 0           | 50              | 10                  | 0       | 1000           |         |
60  -------------- --------------- ------ -------- -------- ------------- ----------------- --------------------- --------- ---------------- --------- 
61 3 rows in set (0.00 sec)

澳门新萄京ProxySQL初体验。 

Configure the monitor user and product user.

  1 [root@zlm2 09:54:24 /var/lib/proxysql]
  2 #ls -l
  3 total 748
  4 -rw------- 1 root root 122880 Aug 10 09:39 proxysql.db
  5 -rw------- 1 root root 347160 Aug 10 09:47 proxysql.log
  6 -rw-r--r-- 1 root root      5 Aug 10 08:30 proxysql.pid
  7 -rw------- 1 root root 110592 Aug 10 09:46 proxysql_stats.db
  8 -rw-r--r-- 1 root root      2 Aug 10 08:29 reload
  9 
 10 [root@zlm2 09:54:32 /var/lib/proxysql]
 11 #tail proxysql.log
 12 2018-08-10 09:54:30 MySQL_Monitor.cpp:605:monitor_read_only_thread(): [ERROR] Timeout on read_only check for 192.168.1.101:3308 after 0ms. Unable to create a connection. If the server is overload, increase mysql-monitor_connect_timeout. Error: timeout on creating new connection: Access denied for user 'monitor'@'192.168.1.101' (using password: YES).
 13 2018-08-10 09:54:30 MySQL_Monitor.cpp:724:monitor_read_only_thread(): [ERROR] Server 192.168.1.101:3308 missed 3 read_only checks. Assuming read_only=1
 14 2018-08-10 09:54:32 MySQL_Monitor.cpp:605:monitor_read_only_thread(): [ERROR] Timeout on read_only check for 192.168.1.103:3308 after 1ms. Unable to create a connection. If the server is overload, increase mysql-monitor_connect_timeout. Error: timeout on creating new connection: Access denied for user 'monitor'@'192.168.1.101' (using password: YES).
 15 2018-08-10 09:54:32 MySQL_Monitor.cpp:724:monitor_read_only_thread(): [ERROR] Server 192.168.1.103:3308 missed 3 read_only checks. Assuming read_only=1
 16 2018-08-10 09:54:32 MySQL_Monitor.cpp:605:monitor_read_only_thread(): [ERROR] Timeout on read_only check for 192.168.1.101:3308 after 0ms. Unable to create a connection. If the server is overload, increase mysql-monitor_connect_timeout. Error: timeout on creating new connection: Access denied for user 'monitor'@'192.168.1.101' (using password: YES).
 17 2018-08-10 09:54:32 MySQL_Monitor.cpp:724:monitor_read_only_thread(): [ERROR] Server 192.168.1.101:3308 missed 3 read_only checks. Assuming read_only=1
 18 2018-08-10 09:54:33 MySQL_Monitor.cpp:605:monitor_read_only_thread(): [ERROR] Timeout on read_only check for 192.168.1.101:3308 after 0ms. Unable to create a connection. If the server is overload, increase mysql-monitor_connect_timeout. Error: timeout on creating new connection: Access denied for user 'monitor'@'192.168.1.101' (using password: YES).
 19 2018-08-10 09:54:33 MySQL_Monitor.cpp:724:monitor_read_only_thread(): [ERROR] Server 192.168.1.101:3308 missed 3 read_only checks. Assuming read_only=1
 20 2018-08-10 09:54:33 MySQL_Monitor.cpp:605:monitor_read_only_thread(): [ERROR] Timeout on read_only check for 192.168.1.103:3308 after 1ms. Unable to create a connection. If the server is overload, increase mysql-monitor_connect_timeout. Error: timeout on creating new connection: Access denied for user 'monitor'@'192.168.1.101' (using password: YES).
 21 2018-08-10 09:54:33 MySQL_Monitor.cpp:724:monitor_read_only_thread(): [ERROR] Server 192.168.1.103:3308 missed 3 read_only checks. Assuming read_only=1
 22 
 23 [root@zlm2 09:54:18 /data/mysql/mysql3308/data]
 24 #tail error.log 
 25 2018-08-10T09:54:09.757619 01:00 773 [Note] Access denied for user 'monitor'@'192.168.1.101' (using password: YES)
 26 2018-08-10T09:54:11.248093 01:00 774 [Note] Access denied for user 'monitor'@'192.168.1.101' (using password: YES)
 27 2018-08-10T09:54:12.748305 01:00 775 [Note] Access denied for user 'monitor'@'192.168.1.101' (using password: YES)
 28 2018-08-10T09:54:14.253693 01:00 776 [Note] Access denied for user 'monitor'@'192.168.1.101' (using password: YES)
 29 2018-08-10T09:54:15.753818 01:00 777 [Note] Access denied for user 'monitor'@'192.168.1.101' (using password: YES)
 30 2018-08-10T09:54:17.274359 01:00 778 [Note] Access denied for user 'monitor'@'192.168.1.101' (using password: YES)
 31 2018-08-10T09:54:18.754761 01:00 779 [Note] Access denied for user 'monitor'@'192.168.1.101' (using password: YES)
 32 2018-08-10T09:54:19.177448 01:00 780 [Note] Access denied for user 'monitor'@'192.168.1.101' (using password: YES)
 33 2018-08-10T09:54:19.386483 01:00 781 [Note] Access denied for user 'monitor'@'192.168.1.101' (using password: YES)
 34 2018-08-10T09:54:20.270737 01:00 782 [Note] Access denied for user 'monitor'@'192.168.1.101' (using password: YES)
 35 
 36 //The user "monitor" has no privileges to connect in MySQL instance yet.
 37 
 38 //Add monitor user "monitor" in the MySQL instance and grant privileges.
 39 (root@localhost mysql3308.sock)[(none)]>grant all privileges on *.* to monitor@'%' identified by 'monitor';
 40 Query OK, 0 rows affected, 1 warning (0.02 sec)
 41 
 42 (root@localhost mysql3308.sock)[(none)]>select user,host from mysql.user;
 43  --------------- ------------- 
 44 | user          | host        |
 45  --------------- ------------- 
 46 | monitor       | %           |
 47 | repl          | 192.168.1.% |
 48 | zlm           | 192.168.1.% |
 49 | mysql.session | localhost   |
 50 | mysql.sys     | localhost   |
 51 | root          | localhost   |
 52 | sst           | localhost   |
 53  --------------- ------------- 
 54 7 rows in set (0.00 sec)
 55 
 56 [root@zlm2 10:03:06 /var/lib/proxysql]
 57 #tail -20 proxysql.log
 58 2018-08-10 10:00:20 [INFO] New mysql_replication_hostgroups table
 59 writer_hostgroup: 10 , reader_hostgroup: 20, Test of ProxySQL
 60 2018-08-10 10:00:20 [INFO] New mysql_group_replication_hostgroups table
 61 2018-08-10 10:00:20 [INFO] Dumping current MySQL Servers structures for hostgroup ALL
 62 HID: 10 , address: 192.168.1.103 , port: 3308 , weight: 1 , status: ONLINE , max_connections: 50 , max_replication_lag: 10 , use_ssl: 0 , max_latency_ms: 1000000000 , comment: 
 63 HID: 10 , address: 192.168.1.101 , port: 3308 , weight: 1 , status: ONLINE , max_connections: 50 , max_replication_lag: 10 , use_ssl: 0 , max_latency_ms: 1000000000 , comment: 
 64 HID: 20 , address: 191.168.1.102 , port: 3308 , weight: 1 , status: ONLINE , max_connections: 50 , max_replication_lag: 10 , use_ssl: 0 , max_latency_ms: 1000000000 , comment: 
 65 HID: 20 , address: 192.168.1.103 , port: 3308 , weight: 1 , status: ONLINE , max_connections: 50 , max_replication_lag: 10 , use_ssl: 0 , max_latency_ms: 1000000000 , comment: 
 66 HID: 20 , address: 192.168.1.101 , port: 3308 , weight: 1 , status: ONLINE , max_connections: 50 , max_replication_lag: 10 , use_ssl: 0 , max_latency_ms: 1000000000 , comment: 
 67 2018-08-10 10:00:20 [INFO] Dumping mysql_servers
 68  -------------- --------------- ------ -------- -------- ------------- ----------------- --------------------- --------- ---------------- --------- ----------------- 
 69 | hostgroup_id | hostname      | port | weight | status | compression | max_connections | max_replication_lag | use_ssl | max_latency_ms | comment | mem_pointer     |
 70  -------------- --------------- ------ -------- -------- ------------- ----------------- --------------------- --------- ---------------- --------- ----------------- 
 71 | 10           | 192.168.1.103 | 3308 | 1      | 0      | 0           | 50              | 10                  | 0       | 1000           |         | 139639198273536 |
 72 | 20           | 192.168.1.101 | 3308 | 1      | 0      | 0           | 50              | 10                  | 0       | 1000           |         | 139639198867456 |
 73 | 20           | 192.168.1.103 | 3308 | 1      | 0      | 0           | 50              | 10                  | 0       | 1000           |         | 139639212485120 |
 74 | 20           | 191.168.1.102 | 3308 | 1      | 0      | 0           | 50              | 10                  | 0       | 1000           |         | 139639212484992 |
 75 | 10           | 192.168.1.101 | 3308 | 1      | 0      | 0           | 50              | 10                  | 0       | 1000           |         | 139639198412544 |
 76  -------------- --------------- ------ -------- -------- ------------- ----------------- --------------------- --------- ---------------- --------- ----------------- 
 77 2018-08-10 10:00:29 MySQL_Monitor.cpp:1437:monitor_ping(): [ERROR] Server 191.168.1.102:3308 missed 3 heartbeats, shunning it and killing all the connections. Disabling other checks until the node comes back online.
 78 
 79 //Now,the monitor user "monitor" of ProxySQL can get the monitor information.
 80 
 81 //Continue to configure the product user which we need to connect in MySQL instance.
 82 (admin@127.0.0.1 6032)[main]>show create table mysql_usersG
 83 *************************** 1. row ***************************
 84        table: mysql_users
 85 Create Table: CREATE TABLE mysql_users (
 86     username VARCHAR NOT NULL,
 87     password VARCHAR,
 88     active INT CHECK (active IN (0,1)) NOT NULL DEFAULT 1,
 89     use_ssl INT CHECK (use_ssl IN (0,1)) NOT NULL DEFAULT 0,
 90     default_hostgroup INT NOT NULL DEFAULT 0,
 91     default_schema VARCHAR,
 92     schema_locked INT CHECK (schema_locked IN (0,1)) NOT NULL DEFAULT 0,
 93     transaction_persistent INT CHECK (transaction_persistent IN (0,1)) NOT NULL DEFAULT 1,
 94     fast_forward INT CHECK (fast_forward IN (0,1)) NOT NULL DEFAULT 0,
 95     backend INT CHECK (backend IN (0,1)) NOT NULL DEFAULT 1,
 96     frontend INT CHECK (frontend IN (0,1)) NOT NULL DEFAULT 1,
 97     max_connections INT CHECK (max_connections >=0) NOT NULL DEFAULT 10000,
 98     PRIMARY KEY (username, backend),
 99     UNIQUE (username, frontend))
100 1 row in set (0.00 sec)
101 
102 (admin@127.0.0.1 6032)[main]>insert into mysql_users(username,password,active,default_hostgroup,default_schema) values('zlm','zlmzlm',1,20,'zlm');
103 Query OK, 1 row affected (0.00 sec)
104 
105 (admin@127.0.0.1 6032)[main]>select * from mysql_users;
106  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
107 | username | password | active | use_ssl | default_hostgroup | default_schema | schema_locked | transaction_persistent | fast_forward | backend | frontend | max_connections |
108  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
109 | zlm      | zlmzlm   | 1      | 0       | 20                | zlm            | 0             | 1                      | 0            | 1       | 1        | 10000           |
110  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
111 1 row in set (0.00 sec)
112 
113 (admin@127.0.0.1 6032)[main]>load mysql users to runtime;save mysql users to disk;
114 Query OK, 0 rows affected (0.00 sec)
115 
116 Query OK, 0 rows affected (0.01 sec)
117 
118 (admin@127.0.0.1 6032)[main]>select * from runtime_mysql_users;
119  ---------- ------------------------------------------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
120 | username | password                                  | active | use_ssl | default_hostgroup | default_schema | schema_locked | transaction_persistent | fast_forward | backend | frontend | max_connections |
121  ---------- ------------------------------------------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
122 | zlm      | *512FB3FAA6F522E351929CAC70AD8EBB0F5901B6 | 1      | 0       | 20                | zlm            | 0             | 1                      | 0            | 0       | 1        | 10000           |
123 | zlm      | *512FB3FAA6F522E351929CAC70AD8EBB0F5901B6 | 1      | 0       | 20                | zlm            | 0             | 1                      | 0            | 1       | 0        | 10000           |
124  ---------- ------------------------------------------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
125 2 rows in set (0.00 sec)
126 
127 (admin@127.0.0.1 6032)[main]>select * from disk.mysql_users;
128  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
129 | username | password | active | use_ssl | default_hostgroup | default_schema | schema_locked | transaction_persistent | fast_forward | backend | frontend | max_connections |
130  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
131 | zlm      | zlmzlm   | 1      | 0       | 20                | zlm            | 0             | 1                      | 0            | 1       | 1        | 10000           |
132  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
133 1 row in set (0.00 sec)

 

Configure the mysql query rules.

 1 (admin@127.0.0.1 6032)[main]>show create table mysql_query_rulesG
 2 *************************** 1. row ***************************
 3        table: mysql_query_rules
 4 Create Table: CREATE TABLE mysql_query_rules (
 5     rule_id INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL,
 6     active INT CHECK (active IN (0,1)) NOT NULL DEFAULT 0,
 7     username VARCHAR,
 8     schemaname VARCHAR,
 9     flagIN INT NOT NULL DEFAULT 0,
10     client_addr VARCHAR,
11     proxy_addr VARCHAR,
12     proxy_port INT,
13     digest VARCHAR,
14     match_digest VARCHAR,
15     match_pattern VARCHAR,
16     negate_match_pattern INT CHECK (negate_match_pattern IN (0,1)) NOT NULL DEFAULT 0,
17     re_modifiers VARCHAR DEFAULT 'CASELESS',
18     flagOUT INT,
19     replace_pattern VARCHAR,
20     destination_hostgroup INT DEFAULT NULL,
21     cache_ttl INT CHECK(cache_ttl > 0),
22     reconnect INT CHECK (reconnect IN (0,1)) DEFAULT NULL,
23     timeout INT UNSIGNED,
24     retries INT CHECK (retries>=0 AND retries <=1000),
25     delay INT UNSIGNED,
26     next_query_flagIN INT UNSIGNED,
27     mirror_flagOUT INT UNSIGNED,
28     mirror_hostgroup INT UNSIGNED,
29     error_msg VARCHAR,
30     OK_msg VARCHAR,
31     sticky_conn INT CHECK (sticky_conn IN (0,1)),
32     multiplex INT CHECK (multiplex IN (0,1,2)),
33     log INT CHECK (log IN (0,1)),
34     apply INT CHECK(apply IN (0,1)) NOT NULL DEFAULT 0,
35     comment VARCHAR)
36 1 row in set (0.00 sec)
37 
38 (admin@127.0.0.1 6032)[main]>insert into mysql_query_rules(active,username,match_pattern,schemaname,destination_hostgroup,apply) values(1,'zlm','^select','zlm',20,1);
39 Query OK, 1 row affected (0.00 sec)
40 
41 (admin@127.0.0.1 6032)[main]>select active,username,match_pattern,schemaname,destination_hostgroup,apply from mysql_query_rules;
42  -------- ---------- --------------- ------------ ----------------------- ------- 
43 | active | username | match_pattern | schemaname | destination_hostgroup | apply |
44  -------- ---------- --------------- ------------ ----------------------- ------- 
45 | 1      | zlm      | ^select       | zlm        | 20                    | 1     |
46  -------- ---------- --------------- ------------ ----------------------- ------- 
47 1 row in set (0.00 sec)
48 
49 (admin@127.0.0.1 6032)[main]>load mysql query rules to runtime;save mysql query rules to disk;
50 Query OK, 0 rows affected (0.00 sec)
51 
52 Query OK, 0 rows affected (0.02 sec)
53 
54 (admin@127.0.0.1 6032)[main]>select active,username,match_pattern,schemaname,destination_hostgroup,apply from runtime_mysql_query_rules;
55  -------- ---------- --------------- ------------ ----------------------- ------- 
56 | active | username | match_pattern | schemaname | destination_hostgroup | apply |
57  -------- ---------- --------------- ------------ ----------------------- ------- 
58 | 1      | zlm      | ^select       | zlm        | 20                    | 1     |
59  -------- ---------- --------------- ------------ ----------------------- ------- 
60 1 row in set (0.00 sec)
61 
62 (admin@127.0.0.1 6032)[main]>select active,username,match_pattern,schemaname,destination_hostgroup,apply from disk.mysql_query_rules;
63  -------- ---------- --------------- ------------ ----------------------- ------- 
64 | active | username | match_pattern | schemaname | destination_hostgroup | apply |
65  -------- ---------- --------------- ------------ ----------------------- ------- 
66 | 1      | zlm      | ^select       | zlm        | 20                    | 1     |
67  -------- ---------- --------------- ------------ ----------------------- ------- 
68 1 row in set (0.00 sec)

 

3. Test dml operations

 

Login MySQL Instance with product user 'zlm'.

  1 //Connect with port 6033 to use the query rule of ProxySQL.
  2 [root@zlm2 11:13:16 /data/mysql/mysql3308/data]
  3 #mysql -uzlm -pzlmzlm -h192.168.1.101 -P6033
  4 mysql: [Warning] Using a password on the command line interface can be insecure.
  5 Welcome to the MySQL monitor.  Commands end with ; or g.
  6 Your MySQL connection id is 4
  7 Server version: 5.5.30 (ProxySQL)
  8 
  9 Copyright (c) 2009-2018 Percona LLC and/or its affiliates
 10 Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
 11 
 12 Oracle is a registered trademark of Oracle Corporation and/or its
 13 affiliates. Other names may be trademarks of their respective
 14 owners.
 15 
 16 Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
 17 
 18 (zlm@192.168.1.101 6033)[(none)]>show tables; //The default database automatically became zlm although I have't specify which database to use.
 19  --------------- 
 20 | Tables_in_zlm |
 21  --------------- 
 22 | t1            |
 23 | t2            |
 24  --------------- 
 25 2 rows in set (0.00 sec)
 26 
 27 (zlm@192.168.1.101 6033)[(none)]>select * from t1;
 28  ---- ------------ 
 29 | id | name       |
 30  ---- ------------ 
 31 |  1 | MySQL      |
 32 |  2 | Oracle     |
 33 |  3 | PostgreSQL |
 34 |  4 | Redis      |
 35  ---- ------------ 
 36 4 rows in set (0.00 sec)
 37 
 38 (zlm@192.168.1.101 6033)[(none)]>insert into t1 values(5,'MongoDB');
 39 Query OK, 1 row affected (0.01 sec)
 40 
 41 (zlm@192.168.1.101 6033)[(none)]>select * from t1;
 42  ---- ------------ 
 43 | id | name       |
 44  ---- ------------ 
 45 |  1 | MySQL      |
 46 |  2 | Oracle     |
 47 |  3 | PostgreSQL |
 48 |  4 | Redis      |
 49 |  5 | MongoDB    |
 50  ---- ------------ 
 51 5 rows in set (0.00 sec)
 52 
 53 //Check the stats we've catched in "stats_mysql_query_digest" table of "stats" database of ProxySQL.
 54 (admin@127.0.0.1 6032)[main]>use stats;
 55 Reading table information for completion of table and column names
 56 You can turn off this feature to get a quicker startup with -A
 57 
 58 Database changed
 59 (admin@127.0.0.1 6032)[stats]>show tables; //Notice,if you don't specify "from xxx",it will show tables of "main" database.
 60  -------------------------------------------- 
 61 | tables                                     |
 62  -------------------------------------------- 
 63 | global_variables                           |
 64 | mysql_collations                           |
 65 | mysql_group_replication_hostgroups         |
 66 | mysql_query_rules                          |
 67 | mysql_query_rules_fast_routing             |
 68 | mysql_replication_hostgroups               |
 69 | mysql_servers                              |
 70 | mysql_users                                |
 71 | proxysql_servers                           |
 72 | runtime_checksums_values                   |
 73 | runtime_global_variables                   |
 74 | runtime_mysql_group_replication_hostgroups |
 75 | runtime_mysql_query_rules                  |
 76 | runtime_mysql_query_rules_fast_routing     |
 77 | runtime_mysql_replication_hostgroups       |
 78 | runtime_mysql_servers                      |
 79 | runtime_mysql_users                        |
 80 | runtime_proxysql_servers                   |
 81 | runtime_scheduler                          |
 82 | scheduler                                  |
 83  -------------------------------------------- 
 84 20 rows in set (0.00 sec)
 85 
 86 (admin@127.0.0.1 6032)[stats]>show tables from stats; //Speicify the target database to be "stats".
 87  -------------------------------------- 
 88 | tables                               |
 89  -------------------------------------- 
 90 | global_variables                     |
 91 | stats_memory_metrics                 |
 92 | stats_mysql_commands_counters        |
 93 | stats_mysql_connection_pool          |
 94 | stats_mysql_connection_pool_reset    |
 95 | stats_mysql_global                   |
 96 | stats_mysql_prepared_statements_info |
 97 | stats_mysql_processlist              |
 98 | stats_mysql_query_digest             |
 99 | stats_mysql_query_digest_reset       |
100 | stats_mysql_query_rules              |
101 | stats_mysql_users                    |
102 | stats_proxysql_servers_checksums     |
103 | stats_proxysql_servers_metrics       |
104 | stats_proxysql_servers_status        |
105  -------------------------------------- 
106 15 rows in set (0.00 sec)
107 
108 (admin@127.0.0.1 6032)[stats]>select hostgroup,schemaname,username,substr(digest_text,120,-120),count_star from stats_mysql_query_digest;
109  ----------- ------------ ---------- ---------------------------------- ------------ 
110 | hostgroup | schemaname | username | substr(digest_text,120,-120)     | count_star |
111  ----------- ------------ ---------- ---------------------------------- ------------ 
112 | 20        | zlm        | zlm      | select * from t1                 | 2          |
113 | 20        | zlm        | zlm      | insert into t1 values(?,?)       | 1          |
114 | 20        | zlm        | zlm      | select USER()                    | 2          |
115 | 20        | zlm        | zlm      | show tables                      | 1          |
116 | 20        | zlm        | zlm      | select @@version_comment limit ? | 2          |
117  ----------- ------------ ---------- ---------------------------------- ------------ 
118 5 rows in set (0.00 sec)
119 
120 //It's due to I've set "default_hostgroup" with "20".Actually it should be set with "10" of writer_hostgroup.
121 
122 (admin@127.0.0.1 6032)[stats]>select * from mysql_users;
123  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
124 | username | password | active | use_ssl | default_hostgroup | default_schema | schema_locked | transaction_persistent | fast_forward | backend | frontend | max_connections |
125  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
126 | zlm      | zlmzlm   | 1      | 0       | 20                | zlm            | 0             | 1                      | 0            | 1       | 1        | 10000           |
127  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
128 1 row in set (0.00 sec)
129 
130 (admin@127.0.0.1 6032)[stats]>update mysql_users set default_hostgroup=10;
131 Query OK, 1 row affected (0.00 sec)
132 
133 (admin@127.0.0.1 6032)[stats]>select * from mysql_users;
134  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
135 | username | password | active | use_ssl | default_hostgroup | default_schema | schema_locked | transaction_persistent | fast_forward | backend | frontend | max_connections |
136  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
137 | zlm      | zlmzlm   | 1      | 0       | 10                | zlm            | 0             | 1                      | 0            | 1       | 1        | 10000           |
138  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
139 1 row in set (0.00 sec)
140 
141 (admin@127.0.0.1 6032)[stats]>load mysql users to runtime;save mysql users to disk;
142 Query OK, 0 rows affected (0.00 sec)
143 
144 Query OK, 0 rows affected (0.05 sec)
145 
146 (admin@127.0.0.1 6032)[stats]>select  * from runtime_mysql_users;
147  ---------- ------------------------------------------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
148 | username | password                                  | active | use_ssl | default_hostgroup | default_schema | schema_locked | transaction_persistent | fast_forward | backend | frontend | max_connections |
149  ---------- ------------------------------------------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
150 | zlm      | *512FB3FAA6F522E351929CAC70AD8EBB0F5901B6 | 1      | 0       | 10                | zlm            | 0             | 1                      | 0            | 0       | 1        | 10000           |
151 | zlm      | *512FB3FAA6F522E351929CAC70AD8EBB0F5901B6 | 1      | 0       | 10                | zlm            | 0             | 1                      | 0            | 1       | 0        | 10000           |
152  ---------- ------------------------------------------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
153 2 rows in set (0.00 sec)
154 
155 (admin@127.0.0.1 6032)[stats]>select  * from disk.mysql_users;
156  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
157 | username | password | active | use_ssl | default_hostgroup | default_schema | schema_locked | transaction_persistent | fast_forward | backend | frontend | max_connections |
158  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
159 | zlm      | zlmzlm   | 1      | 0       | 10                | zlm            | 0             | 1                      | 0            | 1       | 1        | 10000           |
160  ---------- ---------- -------- --------- ------------------- ---------------- --------------- ------------------------ -------------- --------- ---------- ----------------- 
161 1 row in set (0.00 sec)
162 
163 //Clear the statistic data of table "stats_mysql_query_digest".
164 (admin@127.0.0.1 6032)[stats]>select * from stats_mysql_query_digest_reset;
165  ----------- ------------ ---------- -------------------- ---------------------------------- ------------ ------------ ------------ ---------- ---------- ---------- 
166 | hostgroup | schemaname | username | digest             | digest_text                      | count_star | first_seen | last_seen  | sum_time | min_time | max_time |
167  ----------- ------------ ---------- -------------------- ---------------------------------- ------------ ------------ ------------ ---------- ---------- ---------- 
168 | 20        | zlm        | zlm      | 0x3765930C7143F468 | select * from t1                 | 2          | 1533892415 | 1533892545 | 828      | 204      | 624      |
169 | 20        | zlm        | zlm      | 0x3CE4C46484576DFD | insert into t1 values(?,?)       | 1          | 1533892538 | 1533892538 | 13359    | 13359    | 13359    |
170 | 20        | zlm        | zlm      | 0x594F2C744B698066 | select USER()                    | 2          | 1533892377 | 1533892397 | 0        | 0        | 0        |
171 | 20        | zlm        | zlm      | 0x99531AEFF718C501 | show tables                      | 1          | 1533892400 | 1533892400 | 2607     | 2607     | 2607     |
172 | 20        | zlm        | zlm      | 0x226CD90D52A2BA0B | select @@version_comment limit ? | 2          | 1533892377 | 1533892397 | 0        | 0        | 0        |
173  ----------- ------------ ---------- -------------------- ---------------------------------- ------------ ------------ ------------ ---------- ---------- ---------- 
174 5 rows in set (0.01 sec)
175 
176 (admin@127.0.0.1 6032)[stats]>select * from stats_mysql_query_digest;
177 Empty set (0.00 sec)
178 
179 //Do the dml operations again.
180 (zlm@192.168.1.101 6033)[(none)]>show tables;
181  --------------- 
182 | Tables_in_zlm |
183  --------------- 
184 | t1            |
185 | t2            |
186  --------------- 
187 2 rows in set (0.00 sec)
188 
189 (zlm@192.168.1.101 6033)[(none)]>select * from t2;
190  ---- ------------ 
191 | id | name       |
192  ---- ------------ 
193 |  1 | MySQL      |
194 |  2 | Oracle     |
195 |  3 | SQL Server |
196 |  4 | Redis      |
197 |  5 | MongoDB    |
198 |  6 | PostgreSQL |
199  ---- ------------ 
200 6 rows in set (0.01 sec)
201 
202 (zlm@192.168.1.101 6033)[(none)]>insert into t2 values(7,'Hadoop');
203 Query OK, 1 row affected (0.01 sec)
204 
205 //Check the diagnostic data in table "stats_mysql_query_digest" again.
206 (admin@127.0.0.1 6032)[stats]>select active,username,match_pattern,schemaname,destination_hostgroup,apply from mysql_query_rules;
207  -------- ---------- --------------- ------------ ----------------------- ------- 
208 | active | username | match_pattern | schemaname | destination_hostgroup | apply |
209  -------- ---------- --------------- ------------ ----------------------- ------- 
210 | 1      | zlm      | ^select       | zlm        | 20                    | 1     |
211  -------- ---------- --------------- ------------ ----------------------- ------- 
212 1 row in set (0.00 sec)
213 
214 (admin@127.0.0.1 6032)[stats]>select hostgroup,schemaname,username,substr(digest_text,120,-120),count_star from stats_mysql_query_digest;
215  ----------- ------------ ---------- ------------------------------ ------------ 
216 | hostgroup | schemaname | username | substr(digest_text,120,-120) | count_star |
217  ----------- ------------ ---------- ------------------------------ ------------ 
218 | 20        | zlm        | zlm      | insert into t2 values(?,?)   | 1          |
219 | 20        | zlm        | zlm      | select * from t2             | 1          |
220 | 20        | zlm        | zlm      | show tables                  | 1          |
221  ----------- ------------ ---------- ------------------------------ ------------ 
222 3 rows in set (0.00 sec)
223 
224 //It still doesn't take effect.What's wrong with it?

 

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