HTTP server which provides access to a MySQL database in the form of a dump file (tarred and zipped). The dump is created via select into outfile statements and contains one file per table, and a statements.sql for recreating the table structure. This was created for dumping/moving InnoDB tables, and while it will no doubt work with other table types there are probably faster ways to get the data.

No authentication is provided by the server, so be careful where you put this (bind to a private IP address or localhost).

This code is probably buggy and untested.

No service start-up scripts are provided, so the server needs to be started manually (but look into crontab's @reboot). It should also have access to the same file system as MySQL.

$ go get github.com/allermedia/dbsync
$ go build -o dbsync compress.go dump.go server.go
$ mv dbsync /usr/local/bin

Run as unprivildged user, and edit the server's required environment variables (see varexport.sh). There is currently hacked in support for dumping from two different database servers - for example if a particular database resides on a different server. If still additional servers are needed, this needs to be added - and perhaps cleaned up :)

If you use a second server, then you also need to specify which databases this server should serve. Everything else will be served by the first server.

$ vim varexport.sh
$ source varexport.sh

$ dbsync &> /tmp/dbsync.log &

GET /database/:databasename

• Restrict each table to this amount of rows.

limit=NUMBER

• Ignore tables (relevant create statements will still be generated, but no data sent)

ignore=cache*,voting*

This requires you to write your own program/bash script. Unzip and tar the file; process the statements.sql file first, then you can process all the other files which are named according to the table name. You can use this SQL statement to load the data back in:

LOAD DATA LOCAL INFILE 'table_name.txt' INTO TABLE table_name CHARACTER SET UTF8 FIELDS TERMINATED by ',' ENCLOSED BY '"'

You will probably also need these MySQL settings (as a my.cfg file):

[mysqld]
max_allowed_packet=2047000000
innodb_autoinc_lock_mode = 2
foreign_key_checks = 0
unique_checks = 0
tx_isolation='READ-UNCOMMITTED'
sql_log_bin = 0
innodb_lock_wait_timeout = 5000

[mysql]
local-infile=1

• Provide server as Docker image
• Where are the tests
• Get rid of all the fatal errors in dump (need to send errors back to client)