KVM on SolusVM is randomly stopped or suspended because host node OOM kills corresponding qemu process
Symptoms Every once in a while, randomly, KVM VPS running with SolusVM virtual machine is getting suspended or stopped. The following message can be found in dmesg or in /var/log/messages: Nov 2 13:54:33 server kvm: 25 guests now active server kernel:…
Reinstall OS and import vg0 with solusvm
Let’s imagine, you have a node with /dev/sda drive that consists of a boot partition, root partition and swap and /dev/sd[b-c] drives that compose the volume group with LVM images of your VPSes. In this case, it is necessary: • Copy the directory…
How to stop VPS migration in SolusVM?
Connect to your Master server over SSH. Access SolusVM database: # curl -o solusvmdb.sh https://raw.githubusercontent.com/solusvm-support/helpers/master/solusvmdb.sh && sh solusvmdb.sh Set status to migration as completed using the following…
Error: out of memory
As you might know the system allocates memory on a server by contiguous memory blocks of different size. And there may be a situation where the system does not have contiguous memory blocks of certain size due to memory fragmentation and another…
mdadm Command Examples in Linux
The mdadm command is a tool used to manage software-based RAID arrays. A redundant array of independent disks (RAID) is a set of vendor-independent specifications that support redundancy and fault tolerance for configurations on multiple-device storage…
Replacing a Failed Mirror Disk in a Software RAID Array (mdadm)
The post describes the steps to replace a mirror disk in a software RAID array. In this example, we have used /dev/sda1 as the known good partition, and /dev/sdb1 as the suspect or failing partition. Before proceeding, it is recommended to backup the…
Check LSI RAID Card status with MegaCLI tool
MegaCLI tool can be used to check RAID status on LSI card like LSI MegaRAID 8888ELP and MegaRAID SAS 9260-4i. The tool can be downloaded from http://www.lsi.com/downloads/Public/MegaRAID%20Common%20Files/8.07.07_MegaCLI.zip After downloading, unzip and…
RAID: REBUILDING A FOREIGN DISK BY HAND
While replacing a bad drive with a drive that used to be part of another RAID array configuration, the RAID refused to automatically rebuild, thinking that I might want to import the configuration from this disk (or that there’s data on there that I…
Mellanox NIC’s on Linux
A while back I had to configure a bunch of servers with Mellanox Connect-X 4 NIC’s to talk to an ethernet Switch(Dell S6000-ON to be exact) and the NIC’s that my customer had fitted not only had really old firmware but they were also in…