Category / proxmox

Hit by this little bugger this morning, while trying to move a virtual machine from proxmox 3.4 to 4.4.  This was the only VM on the machine, so I was surprised. (Never seen this before) Could not access KVM kernel module: No such file or directory failed to initialize KVM: No such file or directory […]

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Some time ago, I tried to create a VM on a RAID6 machine, getting this weird error when the virtual disk was made : file system may not support O_DIRECT The solution is to put the “write cache” to write-through. In the newest interface : And the creation succeeded. ps. this was an old issue, […]

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In this guide I just install configure SNMP daemon on Proxmox. SNMP is used to read out the state of the machine, this includes CPU, network (-traffic, -settings,…), memory, … I can suggest LibreNMS, for the monitor. Back to setting SNMP daemon up ! Install the service apt-get install snmpd Config the service I like to […]

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Slowly ZFS on Linux is becoming the mainstream file system, however its more then just a file system, its a (software) raid,  it allows for snapshots, compression, deduplication, … its pretty cool, and I’m in love with it. One of the most important features for me is snapshots, those are dirty cheap in ZFS, so cheap […]

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I removed a node from my cluster some time ago and for some weird reason it kept on being in my (web)interface, It showed as down all the time. Removing it from interface is surprisingly simple, but for future reference here goes :  (note this is for proxmox 3.3-5, but it seems to work for 4.1 as […]

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Getting NFS to work seems a bit of a grey area for LXC … I only recently switched part of our infrastructure over to LXC. But no NFS would be definitely a no-go. We only work in a virtualized environment because its easy for backups and to efficiently use the computational resources on each of our server. […]

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Bye OpenVZ, Hey LXC

27 January, 2016

I recently switched 2/4 Proxmox nodes to the latest build (V4). On those OpenVZ has made place for LXC. The reason why, I am not sure ’bout. I believe it was something with kernel modules and licensing, anyway it changed. Also all the commands have changed, not really good for a efficiency, now we have […]

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A small “bugfix” on proxmox 4.1 with ZFS below it, on a clean install, proxmox will fail to make a lxc (linux container). One has to create a zfs storage before containers can be made … The error during creation: Warning, had trouble writing out superblocks.TASK ERROR: command ‘mkfs.ext4 -O mmp -E ‘root_owner=0:0′ /var/lib/vz/images/100-disk-1.raw’ failed: exit […]

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Awww cute little proxmox container doesn’t know nfs. (CentOS release 6.7 (Final)) [[email protected] /]# mount -o ro -t nfs server:/data /media/ mount: unknown filesystem type ‘nfs’ Well its new its young, lets give it some experience with nfs : yum install nfs-utils So are we ready yet ? [[email protected]/]# mount -o ro -t nfs server:/data […]

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This one is really easy once you know it, so I like to share it with you. I wanted to move a shared directory from our storage server to a container on proxmox; However I don’t want to add ~4TB on data to my regular backup, so I thought a NFS service would be needed; […]

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