To use the Piranha Configuration Tool you will need at minimum a text-only Web browser. If you start a Web browser on the primary LVS router, open the location http://localhost:3636. You can reach the Piranha Configuration Tool from anywhere on through a Web browser by replacing localhost with the hostname or IP address of the primary LVS router.
When your browser connects to the Piranha Configuration Tool, you will notice that you must login to access the cluster configuration services. Enter piranha in the Username field and the password set with piranha-passwd in the Password field.
Author Archives: mea
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
lsof -i -n|grep http
via (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80.
There was a cherokee server running that I didn’t know about that generated this error when trying to start httpd.
Upgrade PHP 5.1/5.2 to 5.3 on CentOS
I’m finding that more and more software developers are being quite inconsiderate and are making code that requires PHP 5.3. Since many server-based and long-term support distros are still on PHP 5.2, this can make things difficult quickly.
via Upgrade PHP 5.1/5.2 to 5.3 on CentOS :: Chris Jean.
Here here! I needed to do the following on CentOS 5.7:
#sudo yum erase php
#sudo yum erase php-commons
#sudo yum install php53
#sudo yum install php53-mysql
2. LVS: What is an LVS? Can I use an LVS?
A Linux Virtual Server (LVS) is a cluster of servers which appears to be one server to an outside client. This apparent single server is called here a “virtual server”. The individual servers (realservers) are under the control of a director (or load balancer), which runs a Linux kernel patched to include the ipvs code. The ipvs code running on the director is the essential feature of LVS. Other user level code is used to manage the LVS (set rules for services handled, handle failover). The director is basically a layer 4 router with a modified set of routing rules (i.e. connections do not originate or terminate on the director, it doesn’t send ACKs etc, it’s just a router).
via 2. LVS: What is an LVS? Can I use an LVS?.
The director uses 3 different methods of forwarding.
- LVS-NAT based on network address translation (NAT)
- LVS-DR (direct routing) where the MAC addresses on the packet are changed and the packet forwarded to the realserver
- LVS-Tun (tunnelling) where the packet is IPIP encapsulated and forwarded to the realserver.
AdditionalResources/Repositories/RPMForge
The default RPMforge repository does not replace any CentOS base packages. In the past it used to, but those packages are now in a separate repository (rpmforge-extras) which is disabled by default.
You can find a complete listing of the RPMforge package packages at http://packages.sw.be/
via AdditionalResources/Repositories/RPMForge – CentOS Wiki.
The rpm at this link allows for yum to see the additional packages — such as alpine and perhaps others that were missing in the base.
H.P.’s TouchPad, Some Say, Was Built on Flawed Software
From concept to creation, WebOS was developed in about nine months, this person said, and the company took some shortcuts. With a project like this, programmers typically start by creating the equivalent of building blocks that can be reused and combined to create different applications. But with WebOS, Palm employees initially constructed each app from scratch. Later, they made such blocks, but they were overhauled once by Palm and then again by H.P., forcing programmers to relearn how to build WebOS apps.
via H.P.’s TouchPad, Some Say, Was Built on Flawed Software – NYTimes.com.
Happy New Year! Here Are Some Great One-Sentence Startup Pitches
Here’s the ‘winner’ of the bunch:
– “My company, Flat-Club, is developing an online marketplace to help students and alumni of top universities find short-term accommodation by leveraging existing social networks to create trust.”
via Happy New Year! Here Are Some Great One-Sentence Startup Pitches | TechCrunch.
SEC letter lists questions for Groupon before IPO
SEC letter lists questions for Groupon before IPO | Consumer | Crain’s Chicago Business.
The SEC questioned why a money-losing startup used $940 million of $1.1 billion in venture capital to partially cash out early investors rather than invest in growth. Many analysts and some potential investors raised similar questions.
How NASA’s GRAIL Probes Will Map the Moon’s Gravity
NASA’s twin Grail probes are designed to map the moon’s gravity field like no other spacecraft before. The $496 million mission will use the ultra-precise moon gravity maps to help scientists better understand the moon’s composition and structure, as well as how the moon evolved during its formation. Learn how the Grail mission works in the SPACE.com infographic above.
Introduction to Databases
Stanford.