Creating Multi Domain Java Key Store

You often may need to access to a host with different host headers. By means of the subjectAltName field introduced in X.509 v3, we are able to specify multiple domains in a single certificate. You can create certificate requests including subjectAltName field by openssl tool. On the other hand, lots of applications require certificates in Java Key Stores. In our case, we should have achieved to configure VMware View Connection Servers with multiple host headers. Since i am familiar with openssl, i have done it in the following way.






20th Anniversary of Linux (LinuxCon)

Memorable Linux Milestones

1991 - Linus Torvalds posts Famous Message - "Hello everybody out there..." - and releases first linux code

1992 - Linus licenses Linux under the GPL, an important decision that will contribute to its success in the coming years

1993 - Slackware becomes first widely adopted distribution

1996 - Linus visits aquarium, gets bit by a penguin and chooses it as linux mascot

1998 - Tech giants begin announcing platform support for Linux

1999 - Red Hat goes public

2003 - IBM runs famous Linux ad during the Superbowl

2005 - Linus appears on the cover of Businessweek with a story that hails Linux as a business success

2007 - The Linux Foundation is formed to promote, protect and standardize Linux, Linus is a fellow

2010 - The Linux-based Android OS outships, all other smartphone OSes in the U.S. and climbs to dominance

2011 - Linux turns 20 and powers the world's supercomputers, stock exchanges, phones, ATMs, healthcare, records, smard grids, the list goes on

LinuxCon







ITIL v3 Service Lifecycle Model from itsm.hr

Service Strategy	Service Transition	Continual Service Improvement
Strategy Generation	Transition Planning and Support	7-Step Improvement Process
Financial Management	Change Management	Service Measurement
Service Portfolio Management	Service Asset & Configuration Mgmt	Service Reporting
Demand Management	Release and Deployment Mgmt
	Service Validation and Testing
Service Design	Evaluation
Service Catalogue Management	Knowledge Management
Service Level Management
Capacity Management	Service Operation
Availability Management	Event Management
IT Service Continuity Management	Incident Management
Information Security Management	Request Fulfilment
Supplier Management	Problem Management
	Access Management

Poster! ITIL v3 Service Lifecycle model (itsm.hr) Download







Customizing Daylight Saving Time

Get the tzdata source rpm package. It can be directly downloaded from
http://mirror.centos.org/centos/$releasever/os/SRPMS/
It is better to create a source yum repository.
Create a file /etc/yum.repos.d/source.repo

[source]
name=CentOS $releaserver - $basearch - Source
baseurl=http://mirror.centos.org/centos/$releasever/os/SRPMS/
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-5

Install yum-utils for yumdownloader






Cloud Computing

Cloud Computing? Parallel Computing? Distributed Computing? Grid Computing? Cluster Computing? Utility Computing? Virtualization? SOA? HPC?

“The interesting thing about cloud computing is that we’ve redefined cloud computing to include everything that we already do.” (Larry Ellision, Oracle’s CEO)

"Computing may someday be organized as a public utility just as the telephone system is a public utility..." (John McCarthy speaking at the MIT Centennial in 1961)

"Cloud computing is simply a trap aimed at forcing more people to buy into locked, proprietary systems that would cost them more and more over time" (Richard Stallman, Free Software Foundation founder)

A lot of people are jumping on the bandwagon of cloud, but I have not heard two people say the same thing about it," said Andy Isherwood, HP's vice president for software services in Europe. 

In fact, NIST has a consistent definition of cloud computing.







MySQL Replication on RHEL | CentOS 5

Configuration of master server /etc/mysql/my.cnf

server-id=1
log-bin = / var/log/mysql/master-bin.log
log-bin-index = /var/lib/mysql/master-log-bin.index
binlog-do-db=mydb
binlog-ignore-db=mysql
binlog-ignore-db=test
innodb_flush_log_at_trx_commit=1
sync_binlog=1
max_connections=1000
max_connect_errors=50







Green Datacenter

Data Center Efficiency Calculator
Data Center Carbon Calculator
Data Center Capital Cost Calculator
Other Tools - APC 





GFS Cluster on VMware vSphere (RHEL | CentOS 5)

First of all, to make vms access to shared block devices, a new scsi controller must be created. The controller must be configured as physical scsi bus sharing to make vms distribute among hosts. Raw devices are recommended. Keep in mind, ha, drs and snapshot features are disabled for the vms that have shared disks.


Install the clustering packages on vms

# yum groupinstall Clustering Cluster\ Storage -y

Install vmware-ng for fencing