MySQL Cluster is different compare to normal MySQL server. It has 3 roles:
management data SQL or API
Data node will required a lot of memory utilization. It is recommended for these nodes to not share any workload with SQL or management nodes as it would end up with resources exhaustion. So we will setup [...]
Nagios is the most popular open-source infrastructure monitoring tools. Nagios offers monitoring and alerting for servers, switches, applications, and services. It alerts users when things go wrong and alerts them again when the problem has been resolved.
I have created a script to install Nagios and Nagious plugin in RHEL/CentOS:
#!/bin/bash # Install nagios and [...]
In this post I am going to deploy a MongoDB sharded cluster. MongoDB is an open-source NoSQL, document-oriented database designed for ease of development and scaling. I am going to use 3 servers, and all the /etc/hosts definition would be as below:
192.168.0.41 mongo1 mongo1.cluster.local 192.168.0.42 mongo2 mongo2.cluster.local 192.168.0.43 [...]
I am in phase of learning a NoSQL database called MongoDB. I will be using a CentOS 6.3 64bit box with minimal ISO installation disc with several package installed like perl, vim, wget, screen, sudo and cronie using yum.
We will use EPEL repo, which includes MongoDB installation package to simplify the deployment.
1. Install [...]
My new assistant has zero knowledge on Linux so I should prepare him some of basic linux command with some example and description. Even though he can use ‘man’ command to get detail explanation on specific command, he still not to familiarize with the environment and gain some experience.
I have created following PDF where [...]
So I have Amanda backup server configured in 2 servers as refer to my previous post here. In that setting, I was using Amanda to backup one of the server’s directory /home/webby/public_html in server sv101.krispykream.net. Now I need to restore all files in directory/home/webby/public_html/blog from latest backup.
Configure Amanda Client for Restore
1. Login [...]
I just upgrading my VMware ESXi 5.0 to VMware ESXi 5.1 using installation disc and I found one of my VM inside this machine cannot be started using vSphere client with following error:
Cannot open the disk ‘/vmfs/volumes/4a365b5d-eceda119-439b-000cfc0086f3/examplevm/examplevm-000002.vmdk’ or one of the snapshot disks it depends on.
Further troubleshooting required me to SSH into the [...]
Installing OpenLDAP with Webmin will require a lot of steps. I have created a BASH script to install OpenLDAP with Webmin in CentOS 6 servers. To install, simply download the installer script at here:
Installation example will be as below. I am using a freshly installed CentOS 6.3 64bit installed with minimal ISO, with wget and perl [...]
I am a free VMware ESXi user. Cloning VM is no way to be as easy as VMware Workstation or vCenter. As you know, for free user, you can only manage your ESXi host directly using vSphere client. Cloning will save your time tremendously when you want to have several machines with same configuration inside [...]
In my office network, we have a lot of small devices like router and switches in our environment. My boss wants me to have a report on all of our network device for auditing purposes. To accomplish this objective, I need to have a server which run as logging server, accepting various type of logging [...]
In my development environment, we have 2 levels of PHPmyAdmin user, the superuser (root) and developer user. Superuser is able to access all features available in PHPmyAdmin and developer user is the database user for database planet_shop which have limitation as stated in MySQL user privilege table.
The current problem is that developer user, which [...]
I have successfully installed and integrate MySQL Cluster with HAproxy and Keepalived to provide scalable MySQL service with cPanel server run on CentOS 6.3 64bit. As you guys know that cPanel has a function called “Setup Remote MySQL server” which we can use to remotely access and control MySQL server from cPanel.
This will bring [...]
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