It’s so fluffy!

(Or: Backblaze B2 cloud backups from a Proxmox Virtual Environment) Backups are one of those things that have a tendency to become unexpectedly expensive – at least through the eyes of a non-techie: Not only do you need enough space to store several generations of data, but you want at least twice that, since you… Continue reading It’s so fluffy!

Replacing ZFS system drives in Proxmox

Running Proxmox in a root-on-zfs configuration in a RAID10 pool results in an interesting artifact: We need a boot volume from which to start our system and initialize the elements required to recognize a ZFS pool. In effect, the first mirror pair in our disk set will have (at least) two partitions: a regular filesystem… Continue reading Replacing ZFS system drives in Proxmox

Monitoring Keepalived with SNMP on Ubuntu 14.04

Introduction Using keepalived in combination with a couple of HAProxy instances is a convenient yet powerful way of ensuring high availability of services. Up until now, I’ve considered it enough to monitor the VMs where the services run, and the general availability of a HAProxy listener on the common address. The drawback is that it’s hard to see if… Continue reading Monitoring Keepalived with SNMP on Ubuntu 14.04