There have been several questions over the past month in the iControl forum
as to whether or not pyControl works on linux. In the pyControl labs
information, there are instructions for install on Microsoft Windows based
systems, but not for linux, so maybe this is the source of confusion. This
is not so much that pyControl isn't linux compatible as it is that the
installation instructions on the many flavors of linux vary. In reality,
the only step that should be different between the distributions is the first
step: installing python. Now, on my flavor of choice, Ubuntu, python 2.6 is
the default version, which doesn't work so well with the ZSI soap library
utilized by pyControl. So I installed python 2.5 alongside 2.6. This
works fine as long as you keep in mind that running python from the command
line will actually run the python2.6 binary. So when you in... (more)
I got a request yesterday morning to asking if there was a way to drop HTTP
requests if a certain number was referenced in the Accept-Language header.
The user referenced this post on Exploring Binary.
The number, 2.2250738585072012e-308, causes the Java runtime and compiler to
go into an infinite loop when converting it to double-precision binary
floating-point. Not good. Twitter is ablaze on the issue, and there is a
good discussion thread on Hacker News as well. So how do you stop it?
At first, this appeared to be a no-brainer, just copy that string and drop if
found in that... (more)
DevCentral has many rock star contributors. Most are not affiliated
officially with F5 Networks, or DevCentral for that matter, but there are
several F5ers who believe in the community, and really believe in the F5
story. One of those F5ers is Matt Cauthorn, or as you know him in the
community, L4L7. You may recognize Matt as the author of pyControl. Well,
not only did he provide this entrance to a better iControl experience, he has
also delivered in a major way with his Vim plugin for editing iRules
(utilizing pyControl of course to make those calls to BIG-IP). I had toyed ... (more)
Virtualization Expo on Ulitzer
If you haven’t yet downloaded the BIG-IP LTM VE trial, I highly suggest
you do. It is a fully-functional LTM, rate-limited to 1Mbps throughput.
If you’re not familiar with virtualized environments, hopefully this blog
will fill in some blanks for how to get started on the network front.
Before downloading your VE image, you need to choose what virtualization
environment you’re installing into. The supported options in the type 1
hypervisor are VMWare ESX version 4 and ESXi version 4. For the type 2
hypervisor (requiring a host O... (more)
It's not an uncommon problem trying to figure out where to plant that sorry
page in the event your farm is down. It's also not an uncommon solution to
just use your BIG-IP to issue a text-only HTTP::respond. It works, but it's
not, how do you say, visually appealing? You want to say sorry and mean
it. With pictures. If you take a stroll through the iRules codeshare,
you'll notice several solutions to this problem. All of them work, with a
variety of methods, but user kirkbauer's entry takes it to another level.
Kirk's sorry page irule generator (written in perl) takes all ... (more)