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Distributed Replicated Storage Across Four Storage Nodes With GlusterFS On CentOS 5.4

Sun, 21 Mar 2010 20:24:29 +0100

Distributed Replicated Storage Across Four Storage Nodes With GlusterFS On CentOS 5.4

This tutorial shows how to combine four single storage servers (running CentOS 5.4) to a distributed replicated storage with GlusterFS. Nodes 1 and 2 (replication1) as well as 3 and 4 (replication2) will mirror each other, and replication1 and replication2 will be combined to one larger storage server (distribution). Basically, this is RAID10 over network. If you lose one server from replication1 and one from replication2, the distributed volume continues to work. The client system (CentOS 5.4 as well) will be able to access the storage as if it was a local filesystem. GlusterFS is a clustered file-system capable of scaling to several peta-bytes. It aggregates various storage bricks over Infiniband RDMA or TCP/IP interconnect into one large parallel network file system. Storage bricks can be made of any commodity hardware such as x86_64 servers with SATA-II RAID and Infiniband HBA.

How To Set Up WebDAV With Apache2 On OpenSUSE 11.2

Fri, 19 Mar 2010 17:32:24 +0100

How To Set Up WebDAV With Apache2 On OpenSUSE 11.2

This guide explains how to set up WebDAV with Apache2 on an OpenSUSE 11.2 server. WebDAV stands for Web-based Distributed Authoring and Versioning and is a set of extensions to the HTTP protocol that allow users to directly edit files on the Apache server so that they do not need to be downloaded/uploaded via FTP. Of course, WebDAV can also be used to upload and download files.

VBoxHeadless - Running Virtual Machines With VirtualBox 3.1.x On A Headless Mandriva 2010.0 Server

Thu, 18 Mar 2010 17:48:25 +0100

VBoxHeadless - Running Virtual Machines With VirtualBox 3.1.x On A Headless Mandriva 2010.0 Server

This guide explains how you can run virtual machines with Sun VirtualBox 3.1.x on a headless Mandriva 2010.0 server. Normally you use the VirtualBox GUI to manage your virtual machines, but a server does not have a desktop environment. Fortunately, VirtualBox comes with a tool called VBoxHeadless that allows you to connect to the virtual machines over a remote desktop connection, so there's no need for the VirtualBox GUI.

Installation Of BIND As A Secondary (Slave) DNS Server On CentOS

Thu, 18 Mar 2010 11:53:34 +0100

Installation Of BIND As A Secondary (Slave) DNS Server On CentOS

After we have installed BIND as a master DNS server (NS1), we can now try to set up a secondary DNS server (NS2) with BIND on CentOS. NS2 acts as a backup if there are problems with NS1.

High-Availability Storage With GlusterFS On CentOS 5.4 - Automatic File Replication (Mirror) Across Two Storage Servers

Wed, 17 Mar 2010 17:21:06 +0100

High-Availability Storage With GlusterFS On CentOS 5.4 - Automatic File Replication (Mirror) Across Two Storage Servers

This tutorial shows how to set up a high-availability storage with two storage servers (CentOS 5.4) that use GlusterFS. Each storage server will be a mirror of the other storage server, and files will be replicated automatically across both storage servers. The client system (CentOS 5.4 as well) will be able to access the storage as if it was a local filesystem. GlusterFS is a clustered file-system capable of scaling to several peta-bytes. It aggregates various storage bricks over Infiniband RDMA or TCP/IP interconnect into one large parallel network file system. Storage bricks can be made of any commodity hardware such as x86_64 servers with SATA-II RAID and Infiniband HBA.

Creating An NFS-Like Standalone Storage Server With GlusterFS On CentOS 5.4

Tue, 16 Mar 2010 17:45:03 +0100

Creating An NFS-Like Standalone Storage Server With GlusterFS On CentOS 5.4

This tutorial shows how to set up a standalone storage server on CentOS 5.4. Instead of NFS, I will use GlusterFS here. The client system will be able to access the storage as if it was a local filesystem. GlusterFS is a clustered file-system capable of scaling to several peta-bytes. It aggregates various storage bricks over Infiniband RDMA or TCP/IP interconnect into one large parallel network file system. Storage bricks can be made of any commodity hardware such as x86_64 servers with SATA-II RAID and Infiniband HBA.

BIND Installation On CentOS

Tue, 16 Mar 2010 15:29:04 +0100

BIND Installation On CentOS

BIND is alternative software for translating domain names into IP addresses. Because domain names are alphabetic, they are easier to remember. So if we will browse the Internet we don’t need to remember IP addresses. For example, the domain name www.yourdomain.com might translate to 192.168.0.1.

Highly Available NFS Server Using DRBD And Heartbeat On Debian 5.0 (Lenny)

Mon, 15 Mar 2010 17:13:47 +0100

Highly Available NFS Server Using DRBD And Heartbeat On Debian 5.0 (Lenny)

This HowTo explains how I set up a highly available NFS server using Debian 5 (Lenny) and drbd8 with heartbeat.

Build Your Own Video Community With Lighttpd And FlowPlayer (Ubuntu 9.10)

Sun, 14 Mar 2010 18:03:02 +0100

Build Your Own Video Community With Lighttpd And FlowPlayer (Ubuntu 9.10)

This article shows how you can build your own video community using lighttpd with its mod_flv_streaming module (for streaming .flv videos, the format used by most major video communities such as YouTube) and its mod_secdownload module (for preventing hotlinking of the videos) on Ubuntu 9.10. I will use FlowPlayer as the video player, a free Flash video player with support for lighttpd's mod_flv_streaming module. I will also show how you can encode videos (.mp4 .mov .mpg .3gp .mpeg .wmv .avi) to the FLV format supported by Adobe Flash.

Striping Across Four Storage Nodes With GlusterFS On Fedora 12

Fri, 12 Mar 2010 16:15:56 +0100

Striping Across Four Storage Nodes With GlusterFS On Fedora 12

This tutorial shows how to do data striping (segmentation of logically sequential data, such as a single file, so that segments can be assigned to multiple physical devices in a round-robin fashion and thus written concurrently) across four single storage servers (running Fedora 12) with GlusterFS. The client system (Fedora 12 as well) will be able to access the storage as if it was a local filesystem. GlusterFS is a clustered file-system capable of scaling to several peta-bytes. It aggregates various storage bricks over Infiniband RDMA or TCP/IP interconnect into one large parallel network file system. Storage bricks can be made of any commodity hardware such as x86_64 servers with SATA-II RAID and Infiniband HBA.

Virtual Users And Domains With Postfix, Courier, MySQL And SquirrelMail (Mandriva 2010.0 x86_64)

Thu, 11 Mar 2010 18:12:16 +0100

Virtual Users And Domains With Postfix, Courier, MySQL And SquirrelMail (Mandriva 2010.0 x86_64)

This document describes how to install a Postfix mail server that is based on virtual users and domains, i.e. users and domains that are in a MySQL database. I'll also demonstrate the installation and configuration of Courier (Courier-POP3, Courier-IMAP), so that Courier can authenticate against the same MySQL database Postfix uses. The resulting Postfix server is capable of SMTP-AUTH and TLS and quota. Passwords are stored in encrypted form in the database. In addition to that, this tutorial covers the installation of Amavisd, SpamAssassin and ClamAV so that emails will be scanned for spam and viruses. I will also show how to install SquirrelMail as a webmail interface so that users can read and send emails and change their passwords.

Installation Of ZendOptimizer And IonCubeLoader Using Lighttpd On CentOS

Thu, 11 Mar 2010 12:25:49 +0100

Installation Of ZendOptimizer And IonCubeLoader Using Lighttpd On CentOS

This tutorial explains how to enable ZendOptimizer and IonCubeLoader in PHP on a Lighttpd web server on CentOS.

How To Harden PHP5 With Suhosin On CentOS 5.4

Wed, 10 Mar 2010 17:12:35 +0100

How To Harden PHP5 With Suhosin On CentOS 5.4

This tutorial shows how to harden PHP5 with Suhosin on a CentOS 5.4 server. From the Suhosin project page: "Suhosin is an advanced protection system for PHP installations that was designed to protect servers and users from known and unknown flaws in PHP applications and the PHP core. Suhosin comes in two independent parts, that can be used separately or in combination. The first part is a small patch against the PHP core, that implements a few low-level protections against bufferoverflows or format string vulnerabilities and the second part is a powerful PHP extension that implements all the other protections."

VBoxHeadless - Running Virtual Machines With VirtualBox 3.1.x On A Headless Fedora 12 Server

Tue, 09 Mar 2010 17:47:21 +0100

VBoxHeadless - Running Virtual Machines With VirtualBox 3.1.x On A Headless Fedora 12 Server

This guide explains how you can run virtual machines with Sun VirtualBox 3.1.x on a headless Fedora 12 server. Normally you use the VirtualBox GUI to manage your virtual machines, but a server does not have a desktop environment. Fortunately, VirtualBox comes with a tool called VBoxHeadless that allows you to connect to the virtual machines over a remote desktop connection, so there's no need for the VirtualBox GUI.

Virtual Hosting With vsftpd And MySQL On Debian Lenny

Mon, 08 Mar 2010 17:34:10 +0100

Virtual Hosting With vsftpd And MySQL On Debian Lenny

Vsftpd is one of the most secure and fastest FTP servers for Linux. Usually vsftpd is configured to work with system users. This document describes how to install a vsftpd server that uses virtual users from a MySQL database instead of real system users. This is much more performant and allows to have thousands of ftp users on a single machine.