Nagios MySQL Replication Plugin Fails with UNKNOWN: Should Never Reach This Part

June 16, 2017 Jordansphere MySQL

I got the following Nagios error after setting up replication between two MySQL 5.6 servers and monitioring the slave. "UNKNOWN: should never reach this part" This plugin was preivously working on MySQL 5.5 servers. It appears that the MySQL 5.6 replication has a different output from MySQL 5.5. Therefore you will need to download the latest […]


Nagios MySQL Replication Plugin Fails, UNKNOWN: Should Never Reach This Part,

Creating an Extra MySQL Slave from Another MySQL Slave

August 25, 2016 Jordansphere FreeBSD

I was tasked with creating a new MySQL slave in a Brighton datacenter to replicate with the master in London. There was already a replication in place from London to Manchester.  Here are the steps to copy the information from Manchester Slave (MySQL2) to the Brighton Slave (MySQL3) . This method allows the master MySQL to be completely untouched  In […]


Move MySQL Directory in WHM \ cPanel

March 24, 2016 Jordansphere Cpanel

We originally installed an image from the cPanel website. The /root parition holds the system information and the /data  houses the users  web and mail data. Unfortunatley the /root partition is NOT installed as an LVM which makes it difficult to expand. What I did notice is that the users MySQL data is actually stored in the /root […]


cpanel, mysql, new partition, whm,

Trimming MySQL bin logs

October 4, 2013 Jordansphere MySQL

During MySQL replication, changes on the Master are written to binary logs for the Slave(s) to update. By default these binary logs will continue to grow indefinitely unless you apply a specific setting. In this scenario I have chosen to keep 4 days worth of bin logs. The amount of bin logs is dependant on how much lag you […]


purging trimming deleting replication logs mysql,

Configuring MySQL Replication 5.5 in 6 steps

August 16, 2013 Jordansphere FreeBSD

Scenario: You want to create a MySQL replication between an exisiting master and a brand new slave. Both machines running FreeBSD 8.x with MySQL 5.5. The master server currently has a mixture of InnoDB and MyISAM engines. A small amount of downtime is available. Master server: Slave server:     (1) ON […]


mysql replication master slave,

Using Logrotate with MySQL Database Backups

August 1, 2013 Jordansphere FreeBSD

Scenario: I wanted to backup all the databases individually from a MySQL server and keep for x days. I set about achieving this using a custom script combined with logrotate. The server is running FreeBSD 8.x.   1) Firstly, the script ( #!/usr/local/bin/bash # # backup each mysql db into a different file, rather […]


logrotate mysql script daily, mysqldump,

Backup MySQL Database Daily and Keep for 7 days

June 20, 2013 Jordansphere MySQL

Here is a script I quickly wrote to mysqldump a single database and keep 7 days worth of backups. #!/bin/bash # Script – # Created by Jordansphere – 20/Jun/13 DATADIR=”/home/mysqlbackups” USERNAME=username PASSWORD=password NOW=$(date +”%d-%m-%Y”) #BACKUP DATABASE in date format (eg “MyDatabase-20-6-2013.sql”) /usr/bin/mysqldump -u $USERNAME -p$PASSWORD –databases MyDatabase > /home/mysqlbackups/MyDatabase.$NOW.sql # REMOVE BACKUPS MORE THAN […]


weekly mysqdump mysql backup one week,

MySQL Corruption: Error 1034 (HY000) : Incorrect key file for table ‘xyz’ ; try to repair it

April 12, 2013 Jordansphere FreeBSD

Scenario: We upgraded from MySQL 5.1 to 5.5 (It was 4.1 in the past and possibly even 3.x before my time!). There seems to be some sort of corruption in a particular DB. The normal myisamchk and REPAIR TABLE functions didnt cut the mustard. Below are my steps to fix the issue. It appears that the […]


Error 1034 MySQL corruption Incorrect key file size,

MySQL : mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication

November 30, 2012 Jordansphere FreeBSD

PHP 5.3 / Mysql 5.5 / FreeBSD   You get the error message: Warning: mysql_connect() [function.mysql-connect]: Premature end of data (mysqlnd_wireprotocol.c:553) in C:\directorya\directoryb\dbconnect.phpon line 57 Warning: mysql_connect() [function.mysql-connect]: OK packet 1 bytes shorter than expected in C:\directorya\directoryb\dbconnect.php on line 57 Warning: mysql_connect() [function.mysql-connect]: mysqlnd cannot connect to MySQL 4.1+ using the old insecure authentication. Please […]


php mysql upgrade mysqlnd 4.1 5.3,

Setting up a daily cron job to mysqldump

August 21, 2012 Jordansphere Linux

Here is a a little life saver to dump a MySQL DB via cron and zip it up in date format  0 2  * * * root mysqldump -u root -pPASSWORD databasename | gzip > /tmp/DBBACKUPS/database_`date ‘+%Y-%m-%d’`.sql.gz This runs at 2am every morning. You can then set up another cron to delete old files or use logrotate to save […]


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