https://github.com/lefred/mysql_gr_routing_check

MySQL Group Replication Routing/Heath Check script
https://github.com/lefred/mysql_gr_routing_check

Last synced: 4 months ago
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MySQL Group Replication Routing/Heath Check script

• Host: GitHub
• URL: https://github.com/lefred/mysql_gr_routing_check
• Owner: lefred
• License: gpl-3.0
• Created: 2016-08-20T22:08:02.000Z (almost 10 years ago)
• Default Branch: master
• Last Pushed: 2018-10-12T11:38:37.000Z (almost 8 years ago)
• Last Synced: 2025-10-05T00:51:37.923Z (9 months ago)
• Language: Shell
• Size: 14.6 KB
• Stars: 44
• Watchers: 6
• Forks: 43
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# mysql_gr_routing_check

MySQL Group Replication Routing/Heath Check script

This script can be used with HA Proxy for example.

You need to call it via xinetd, this is an example::

    # default: on

    # description: check to see if the node is a viable routing candidate

    service mysql_gr_routing_check_write

    {

        disable = no

        flags = REUSE

        socket_type = stream

        port = 6446

        wait = no

        user = mysql

        server = /usr/local/bin/mysql_gr_routing_check.sh

        server_args = 100 write

        log_on_failure += USERID

        only_from = localhost 192.168.90.0/24

        per_source = UNLIMITED

    }

The script can take two optional arguments: 

- amount of max transactions in queue to be processed by the Group Member (trx behind), default is 100

- the role, READ or WRITE, default is WRITE

Usage example::

    [root@mysql1 bin]# telnet 192.168.90.2 6446

    Trying 192.168.90.2...

    Connected to 192.168.90.2.

    Escape character is '^]'.

    HTTP/1.1 200 OK

    Content-Type: text/plain

    Connection: close

    Content-Length: 40

    Group Replication member is a viable routing candidate for write.

    Connection closed by foreign host.

    [root@mysql1 bin]# telnet 192.168.90.2 6447

    Trying 192.168.90.2...

    Connected to 192.168.90.2.

    Escape character is '^]'.

    HTTP/1.1 200 OK

    Content-Type: text/plain

    Connection: close

    Content-Length: 40

    Group Replication member is a viable routing candidate for read.

    Connection closed by foreign host.

**Don't forget that you need some addition to sys schema. These are not yet released in the default sys schema**

To install the missing functions and views, please import ```addition_to_sys.sql```:

    mysql < addition_to_sys.sql