I’ve been using DevStack for quite a while now. DevStack is a documented shell script from RackSpace Cloud Builders to build complete OpenStack development environments. Would recommend it for any developer trying to get OpenStack up and running with minimum fuss. The complete installation instructions are available at http://devstack.org
Archive for the ‘Systems/Network Administration’ Category
Devstack: Documented shell script to build OpenStack environments
Posted: December 21, 2012 in Cloud Computing, computing, Internet, openstack, Systems/Network AdministrationCeph is a free/open source distributed file system.
Posted: December 21, 2012 in Software, Systems/Network AdministrationCeph is a free/open source Software distributed file system Ceph’s main goals are to be Posix-compatible, and completely distributed without a single point of failure.
URL: http://ceph.com/
Trouble shooting MySQL Access denied errors.
Posted: November 28, 2012 in openstack, Software, Systems/Network AdministrationKeystone, the identity and authentication service of OpenStack often relies on MySQL as the back end Database server.
One of the most common errors I have encounted is the MySQL Access denied error. The URL to trouble shoot such kind of errors is http://dev.mysql.com/doc/refman/5.5/en/access-denied.html
What’s new in OpenStack Folsom ?
Posted: October 11, 2012 in Cloud Computing, computing, Systems/Network Administration, WorkNice presentation from Mirantis on what’s new in OpenStack Folsom.
http://www.slideshare.net/mirantis/slideshare-folsom-qawebinar
Brooks’s law
Posted: September 21, 2011 in FOSS, Software, Systems/Network Administration, Technology, Uncategorized“Nine women can’t make a baby in one month”. – Fred Brooks.
My website http://www.vivekcherian.com now has a new home at Linode.
Posted: July 12, 2011 in computing, Debian, FOSS, Internet, Personal, Systems/Network Administration, TechnologyMoved my website http://www.vivekcherian.com from Super Dimension Fortress to my own VPS at Linode after the recent repeated cracker attacks on my websites and home workstation.
Hosting multiple websites with Apache2 on Debian
Posted: July 10, 2011 in Debian, FOSS, Internet, Security, Systems/Network Administration, TechnologyI am going to cover the basics of Name Based Virtual Hosting using Apache2 running on a Debian GNU/Linux Server.
The advantage of Name Based Virtual hosting is that you can host multiple websites from an Apache2 Web server and all these websites only require one static I.P Address and also the requirement that your domain name should resolve to the I.P Address of your server.
Steps
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Step 1:First let us create the document root directories for the virtual domains example.com,example.org and example.net
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root@zion:~# mkdir /home/www
root@zion:~# mkdir /home/www/www.example.com
root@zion:~# mkdir /home/www/www.example.com/htdocs
root@zion:~# mkdir /home/www/www.example.com/cgi-bin
root@zion:~# mkdir /home/www/www.example.com/logs
root@zion:~# mkdir /home/www/www.example.net
root@zion:~# mkdir /home/www/www.example.net/htdocs
root@zion:~# mkdir /home/www/www.example.net/logs
root@zion:~# mkdir /home/www/www.example.net/cgi-bin
root@zion:~# mkdir /home/www/www.example.org
root@zion:~# mkdir /home/www/www.example.org/htdocs
root@zion:~# mkdir /home/www/www.example.org/logs
root@zion:~# mkdir /home/www/www.example.org/cgi-bin
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Please note that I have created separate directories for
htdocs,logs,cgi-bin
Step 2: To enable virtual hosts in your Apache 2 Configuration.
For this let us create a file called /etc/apache2/conf.d/virtual.conf and the following content in it.
——————————————
#
# We’re running multiple virtual hosts.
#
NameVirtualHost *
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3) Create host files in /etc/init.d/sites-available in the following format for example.com
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ServerAdmin webmaster@example.com
ServerName http://www.example.com
ServerAlias example.com
# Indexes + Directory Root.
DirectoryIndex index.html
DocumentRoot /home/www/www.example.com/htdocs/
# CGI Directory
ScriptAlias /cgi-bin/ /home/www/www.example.com/cgi-bin/
Options +ExecCGI
# Logfiles
ErrorLog /home/www/www.example.com/logs/error.log
CustomLog /home/www/www.example.com/logs/access.log combined
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Create similar virtual host files for example.net and example.org
4) Now enable the sites by running the command a2ensite
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root@zion:~# a2ensite http://www.example.com
Site http://www.example.com installed; run /etc/init.d/apache2 reload to enable.
root@zion:~# a2ensite http://www.example.net
Site http://www.example.net installed; run /etc/init.d/apache2 reload to enable.
root@zion:~# a2ensite http://www.example.org
Site http://www.example.org installed; run /etc/init.d/apache2 reload to enable.
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This will create a symbolic link between the files for the domains from /etc/init.d/sites-available to /etc/init.d/sites-enabled.
5) Restart apache2 with the command /etc/init.d/apache2 restart.
Default Installation layouts for Apache httpd on various Operating Systems and Distributions.
Posted: July 9, 2011 in Debian, FOSS, Internet, Systems/Network AdministrationI was looking for a URL that would help me to list out the the default installation layouts for Apache httpd on various operating systems and distributions.
I found this URL: http://wiki.apache.org/httpd/DistrosDefaultLayout
Thanks to jMCg on #httpd on FreeNode for pointing me to this URL.
Red Hat Certified System Administrator
Posted: December 24, 2010 in computing, Internet, Software, Systems/Network Administration, Technology, WorkI received an email early today morning from The Red Hat Certification Central informing me that I have been awarded a new certification named Red Hat Certified System Administrator.
My new RHCSA certificate number is 100-173-327
Join the Electronic Frontier Foundation in standing up against Internet censorship
Posted: December 9, 2010 in Activism, Citizen Journalism, computing, Internet, Security, Software, Systems/Network Administration, TechnologyI support the Electronic Frontier Foundation in their stand against Internet Censorship.