Linux, Nginx, ZFS, PHP-FPM and systems howtos
Cannot find device br-ex fix for openvswitch on openstack During the installation of OpenStack on Debian Wheezy I noticed an unusual Behave. While booting up the networking task Debian complained about: Cannot find device br-ex....
Updated August 2026: LVM on top of ZFS is still an unusual but workable compromise when a consumer only speaks LVM/iSCSI. Be careful with alignment, ashift, and double caching. On modern kernels, confirm ZoL +...
Fix for broken vnc console on Openstack Essex under Debian/Ubuntu The Openstack dashboard novnc console broke after the last two security release of essex openstack (2012.1.1-14/2012.1.1-15). Here is the solution Fix for broken vnc console...
Configure zfs to start before proxmox or openstack If you followed my previous articles: Native ZFS for Linux on Proxmox or Native ZFS for Linux on Openstack and encountered some problem that daemons seems fail...
Updated August 2026: OpenStack release names in this post are historical, but the ZFS-on-Linux operational notes (datasets, ARC pressure, virtio disks) still apply if you run ZoL under a hypervisor or cloud node today. Prefer...
