Scott Dowdle's blog
I recently started using a tool that I find very handy. It is named func and it is a remote api for management, configuration, and monitoring of systems. What does that mean exactly? I'll get into that but first a little background.
In my day job I manage a number of Linux systems. Some are servers and more are desktop machines in labs used by students. All of the lab machines are triple-boot (Windows XP Pro, CentOS 5.4, and Fedora 12). Fedora has a lot of updates... and it is hard to keep up with them. Typically I have to ssh into each machine to work on it but most of what I do is the same thing over and over again. Wouldn't it be nice to be able to manage multiple machines at once with one command line? That is what func does for you. func allows you to manage remote machines with one command line in parallel.
func was written by Fedora developers mainly to help them manage the server infrastructure that makes up the Fedora distribution's online public servers and build systems. They have an active mailing list that you are encouraged to participate in if you are interested in asking questions and helping to shape the future development of func.
func is written in Python and comes with a number of modules that are custom built for certain tasks. If there is an existing module for your task(s), use the existing module. If not, you can use the command module which basically allows you to run whatever command(s) you want on your remote machines.
Red Hat Enterprise Linux 5 (Tikanga) was released on March 14, 2007 and yesterday was RHEL 5's 3rd birthday. Since then we have gotten 4 update releases.
Given the fact that Red Hat's original plan was to have a new RHEL release every 18 - 24 months, one has to wonder where RHEL 6 is and why it is so late. My best guess is that RHEL 6 (which so far has had a non-public alpha release within Red Hat as witnessed in some Bugzilla reports) will come out sometime this summer... possibly in time for the Red Hat Summit in Boston (June 22-25, 2010). For that to happen I would expect a public beta for RHEL 6 to be released in the not too distant future. We'll see how that pans out.
While we are waiting, how about some idle discussion?
I periodically check out Fedora Planet and today I noticed a big post by Josh Boyer entitled, "Why Fedora needs an Updates Policy". I left a medium-sized comment there that I decided to post here as well.
It is working pretty well without a policy... but that isn't to say that a policy isn't needed, because it would be good to have an update policy. I however like the rapid pace of updates and version churn in Fedora and I think the codification of an update policy would be slanted to always favor more conservative updates.
I like that Fedora updates KDE every time there is a new release from the KDE project. I like how I can get newer versions of things as they appear... and yes it will sometimes lead to breakage, but that was one of the charms of Fedora. On the other hand it seems that some packages are constantly updated, like every other week. That may be an exaggeration but sometimes it feels like that.
Ideally there would be a conservative updates repo and a newest-stuff repo... but I'm sure that would be more work than your already overworked group of Red Hat employees and Fedora volunteers would want to take on... and I don't blame them.
Given the rapid 6 month development cycle of Fedora and the limited lifespan of any given release... the better answer, if stability is the considern, would be to lengthen the development release cycle... but no one wants to do that, right? Another solution would be to have stated LTS releases every couple of releases, but again... that idea has been batted around several times and dismissed.
It seems many wish something would fall between the rapid development cycle of Fedora and the slow development cycle of RHEL. I don't see how that is going to happen.
Not having an update policy and the recent complaints about it will be something that is heavily criticized by those from other distros and the Linux press... but it doesn't mean that the system you have been working with and the decisions you have been making haven't been working well enough. Package makers are supposed to submit their stuff to testing, people are supposed to test and provide feedback, and only when a package is deemed sufficiently ready should it be considered. I think it is better to leave it up to the package maintainers themselves on what version of a piece of software they want to release... unless of course is an underlying package that disrupts things above it... and you have tried to address that by identifying core/critical packages and putting more rules on their being updated.
I would hope any update policy Fedora comes up with would retain the current flavor of Fedora with rapid and constant updates... rather than being stuck with older releases of things when upstream has fixed a lot of bugs and released newer versions with additional features. If you don't retain that quality then it will just encourage the development of yet more third-party repositories with newer software and just make an even bigger mess. This gets back to the seeming constant desire for Fedora to define itself and who it is targeting... and then potentially limiting itself to those more strictly defined goals. I for one like it fast and loose... but I'm just a user. :)
Just got done reading, "Confessions of an Ubuntu Fanboy". While I'm glad the author has decided to be more practical in his promotion of Linux and Ubuntu, I strongly disagree with some of his conclusions and I'll cover them below.
I have been using Linux for about 15 years now and over the course of that time I've helped more people than I care to count with Linux installs, removals and everything in-between. I've seen people try Linux out for a few days and give up on it. I've seen people tough it out and become valued members of our local Linux community. Linux isn't for everyone and choice is good. I no longer advocate Linux for someone who isn't willing to learn new things. I quit trying to push it on people and now I'm somewhat selective in helping people the second they say they want to try Linux. I state up front that there is a learning curve and that they will need to expect it. If I sense that they don't have patience to learn new things, I don't even bother.
The problem with the article in question is that the author seems to want to try to make Linux for everyone and in doing so, he advocates violating some important tenants. He primarily focuses on Windows users but it could be any proprietary OS or applications.
Another presentation from RHVE 2009. This one is entitled, "Virtualization and Multi-Level Security" by James Labocki and Greg Pryzby of Red Hat.
Another presentation from RHVE 2009. This one is entitled, "The Sky is the Limit: Building your Own Cloud Infrastructure using Red Hat Enterprise Virtualization" by Hugh Brock and Jan Mark Holzer of Red Hat.
Another presentation from RHVE 2009. This one is entitled, "Secure Virtualization using SELinux" by Dan Walsh of Red Hat.
Another presentation from RHVE 2009. This one is entitled, "Red Hat Enterprise Virtualization" by Navin Thadani who is a big wig at Red Hat. It is from the business track and higher level view.
Another presentation from RHVE 2009. This one is entitled, "Red Hat Virtualization: Breaking Performance and Scalability Barriers" by John Shaksober and Vijay Tehran of Red Hat.
I downloaded all of the videos offered from the Red Hat Virtual Experience 2009. They made them available as Ogg Theora .ogv files so I didn't even have to convert them. They are of moderate to low quality especially with regards to audio... so they can be a little annoying but the presentation material is generally top notch.
In this video, Andrew Cathrow of Red Hat spends about 23 minute explaining what KVM.