Why I’m becoming increasingly disillusioned with SELinux
Posted by in Linux on October 22, 2011
My history with SELinux is a… varied one. I first remember using it back in Fedora Core 6. I soon gave up on it, the labeling wasn’t consistent and I didn’t have the time nor inclination to relabel everything, especially when a quick one work change in a config file fixed all my problems. The […]
Win2K8R2 as HVM VM on Xen 4.1
Posted by in Xen on October 21, 2011
Config file: pastebin.com/ULE1Y49R Also, it’s working fine without the Xen extensions, though there’s (at least) one unknown device in the device manager)
Sudo broken on F16?
Posted by in Linux on October 21, 2011
I haven’t been able to use sudo on F16Beta on both machines that I upgraded – even though I know sudo worked fine before I upgraded. Not sure why/how it broke… Turns out SELinux broke it somehow.
SELinux, Xen & LVMs
Posted by in Xen on October 21, 2011
I discovered something new today: SELinux can and does prevent access to logical volumes. This is entirely unexpected for me, because I always thought SELinux only worked on files. I was wondering why my test VM suddenly refused to start with the error “Disk is not accessible” after I upgraded it to F16Beta. I checked […]
Xen documentation
Posted by in Xen on October 20, 2011
I read a most interesting post on the Xen-users list today: lists.xensource.com/archives/html/xen-users/2011-10/msg00350.html I’m going to try to follow these suggested topics. I mean, I got Win2k8R2 running on Xen, and I’m running Xen on F16Beta, neither of which I see documented anywhere, so that’s surely something I can contribute to the community docs…
Networking upgrade from Xen 4.0 to 4.1
Posted by in Xen on October 16, 2011
I believe that Xen 4.1 saw the rewrite of what I’m assuming is the entire network configuration stack. Perhaps the most significant thing for me was that the domU’s network connection isn’t created/initiated properly if the domU config file has anything other than the MAC address and the bridge to which to attach the vif […]
Scheduling stuff to happen at reboots in Linux
Posted by in Linux on October 16, 2011
Problem: My 1U is throwing correctable memory errors every few seconds, but I can’t do much about it, so I’m ignoring it. Solution: Disable the log messages about correctable memory errors. For future reference, the command is echo 0 > /sys/module/edac_core/parameters/edac_mc_log_ce Problem: I don’t want to have to do that after every reboot! Solution: Use […]
The downsides of using old servers as test beds
Posted by in Xen on October 16, 2011
I managed to forget that Xen needs a PAE enabled kernel on i686. Oops. On a related note, adding ‘noreboot’ to the Xen command line stops automatic reboots, giving you enough time to read the error message.
Upgrading to Fedora 16 Beta with yum
So… I saw that Fedora 16 was out in Beta. I decided to try out the supposed Xen dom0 capability, using my old 1U. It had Fedora 15 installed, but nothing on it, so I just decided to blow it all away. To start, I went and downloaded the Live CD. First problem: I grabbed […]
Controlling groups of machines
Posted by in Linux on September 13, 2011
So I’ve ended up bumping up the number of VMs I have running. And it’s getting annoying trying to manage them all. Previously, I was looking at using Puppet or Chef to control all the VMs, but never went anywhere with it. So now I’ve decided on using Puppet. And combining it with Func. That’s […]