Category: Virtualization – Page 2

Proxmox pveperf

Posted on August 30, 2020 by ServerOk

pveperf is a command line benchmarking tool in proxmox server.

root@server70:~# pveperf
CPU BOGOMIPS:      59199.84
REGEX/SECOND:      3672349
HD SIZE:           38.32 GB (/dev/md2)
BUFFERED READS:    79.99 MB/sec
AVERAGE SEEK TIME: 8.39 ms
FSYNCS/SECOND:     23.87
DNS EXT:           16.46 ms
DNS INT:           19.34 ms (hostonnet.com)
root@server70:~#

root@server70:~# pveperf

CPU BOGOMIPS: 59199.84

REGEX/SECOND: 3672349

HD SIZE: 38.32 GB (/dev/md2)

BUFFERED READS: 79.99 MB/sec

AVERAGE SEEK TIME: 8.39 ms

FSYNCS/SECOND: 23.87

DNS EXT: 16.46 ms

DNS INT: 19.34 ms (hostonnet.com)

root@server70:~#

Here is benchmark on another server – Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz, 2 * 120 GB SSD ATA OCZ-VERTEX3

root@Proxmox-VE ~ # pveperf
CPU BOGOMIPS:      76805.76
REGEX/SECOND:      1126262
HD SIZE:           14.70 GB (/dev/mapper/vg0-root)
BUFFERED READS:    321.65 MB/sec
AVERAGE SEEK TIME: 0.20 ms
FSYNCS/SECOND:     1026.63
DNS EXT:           14.69 ms
root@Proxmox-VE ~ #

root@Proxmox-VE ~ # pveperf

CPU BOGOMIPS: 76805.76

REGEX/SECOND: 1126262

HD SIZE: 14.70 GB (/dev/mapper/vg0-root)

BUFFERED READS: 321.65 MB/sec

AVERAGE SEEK TIME: 0.20 ms

FSYNCS/SECOND: 1026.63

DNS EXT: 14.69 ms

root@Proxmox-VE ~ #

[…]

Proxmox useful command to manage Containers

Posted on August 30, 2020 by ServerOk

pct is a command line tool to manage containers (LXC) in proxmox server. Here are some useful commands

pct enter 100
pct enter 101
pct exec 100 yum update
pct exec 100 yum update -y
pct list
pct reboot 100
pct resize 100 rootfs 100G
pct set 101 -memory 10000
pct start 100

pct enter 100

pct enter 101

pct exec 100 yum update

pct exec 100 yum update -y

pct list

pct reboot 100

pct resize 100 rootfs 100G

pct set 101 -memory 10000

pct start 100

pct documentation available at https://pve.proxmox.com/pve-docs/pct.1.html See proxmox […]

proxmox config files

Posted on August 30, 2020 (August 30, 2020) by ServerOk

To find versions of proxmox packages

pveversion -v

1	pveversion -v

Storage Config

root@server70:~# cat /etc/pve/storage.cfg
lvm: local_lvm
	vgname pve
	content images

dir: local
	path /var/lib/vz
	content iso,rootdir,vztmpl,images
	maxfiles 0

root@server70:~#

root@server70:~# cat /etc/pve/storage.cfg

lvm: local_lvm

vgname pve

content images

dir: local

path /var/lib/vz

content iso,rootdir,vztmpl,images

maxfiles 0

root@server70:~#

qemu config Config for KVM VMs stored in folder

/etc/pve/nodes/HOSTNAME/qemu-server

1	/etc/pve/nodes/HOSTNAME/qemu-server

Example

root@server70:~# cat /etc/pve/nodes/server70/qemu-server/100.conf 
boot: c
bootdisk: virtio0
cores: 6
ide2: none,media=cdrom
memory: 32768
name: vm701.hosthat.com
net0: virtio=02:00:00:AC:77:3C,bridge=vmbr0
numa: 0
onboot: 1
ostype: l26
protection: 1
smbios1: uuid=28537e4f-e1ce-4f44-8421-e004370ab6b4
sockets: 1
virtio0: local_lvm:vm-100-disk-1,size=500G
root@server70:~#

root@server70:~# cat /etc/pve/nodes/server70/qemu-server/100.conf

boot: c

bootdisk: virtio0

cores: 6

ide2: none,media=cdrom

memory: 32768

name: vm701.hosthat.com

net0: virtio=02:00:00:AC:77:3C,bridge=vmbr0

numa: 0

onboot: 1

ostype: l26

protection: 1

smbios1: uuid=28537e4f-e1ce-4f44-8421-e004370ab6b4

sockets: 1

virtio0: local_lvm:vm-100-disk-1,size=500G

root@server70:~#

Cluser

root@server70:~# cat /etc/pve/.members
{
"nodename": "server70",
"version": 3,
"cluster": { "name": "help", "version": 1, "nodes": 1, "quorate": 1 },
"nodelist": {
  "server70": { "id": 1, "online": 1, "ip": "158.69.124.221"}
  }
}
root@server70:~#

root@server70:~# cat /etc/pve/.members

{

"nodename": "server70",

"version": 3,

"cluster": { "name": "help", "version": 1, "nodes": 1, "quorate": 1 },

"nodelist": {

"server70": { "id": 1, "online": 1, "ip": "158.69.124.221"}

}

root@server70:~#

[…]

By default VNC Console on a KVM virtual Machine only listens to localhost. So you need to do SSH tunnel to access VNC console. To make VNC available on all interfaces on Host machine, you need to edit file

vi  /etc/libvirt/qemu.conf

1	vi /etc/libvirt/qemu.conf

You need to uncomment the line vnc_listen = “0.0.0.0”.

# VNC is configured to listen on 127.0.0.1 by default.
# To make it listen on all public interfaces, uncomment
# this next option.
#
# NB, strong recommendation to enable TLS + x509 certificate
# verification when allowing public access
#
vnc_listen = "0.0.0.0"

# VNC is configured to listen on 127.0.0.1 by default.

# To make it listen on all public interfaces, uncomment

# this next option.

# NB, strong recommendation to enable TLS + x509 certificate

# verification when allowing public access

vnc_listen = "0.0.0.0"

Once this is done, you […]

Install Vagrant on CentOS

Posted on July 25, 2020 (July 25, 2020) by ServerOk

To install Vagrant on CentOS, go to https://www.vagrantup.com/downloads Get link to latest version, then run “rpm -ivh URL_TO_RPM_FILE”. At time of writing this post, latest Vagrant version is 2.2.9, to install Vagrant 2.2.9, run

rpm -ivh https://releases.hashicorp.com/vagrant/2.2.9/vagrant_2.2.9_x86_64.rpm

1	rpm -ivh https://releases.hashicorp.com/vagrant/2.2.9/vagrant_2.2.9_x86_64.rpm

To check Vagrant version

vagrant --version

1	vagrant --version

See Vagrant […]

Install Linux KVM on CentOS 8

Posted on July 25, 2020 (July 25, 2020) by ServerOk

To install Linux KVM hypervisor on CentOS 8, run

dnf install qemu-kvm

1	dnf install qemu-kvm

Install libvirtd

dnf install libvirt-daemon libvirt-daemon-kvm libvirt-client

1	dnf install libvirt-daemon libvirt-daemon-kvm libvirt-client

Enable libvirtd to start on boot

systemctl enable libvirtd

1	systemctl enable libvirtd

Start libvirtd

systemctl start libvirtd

1	systemctl start libvirtd

To see status, run

systemctl status libvirtd

1	systemctl status libvirtd

Install virt-install

dnf install virt-install

1	dnf install virt-install

Now you have Linux KVM installed. You can use virt-install or Virt Manager to create virtual machine. See Linux KVM Virtualization […]

OpenVZ

Posted on July 25, 2020 (July 25, 2020) by ServerOk

List available OS Templates in your server

vzpkg list -O
vzpkg list -O --with-summary

1 2	vzpkg list -O vzpkg list -O --with-summary

To create a container, run

prlctl create MyCT --vmtype ct --ostemplate centos-7-x86_64

1	prlctl create MyCT --vmtype ct --ostemplate centos-7-x86_64

Lit all vms

prlctl list -a

1	prlctl list -a

[…]

SolusVM

Posted on February 16, 2020 (February 16, 2021) by ServerOk

Create Reverse DNS (rDNS) / PTR Record in SolusVM VPS Control Panel […]

Hyper V

Posted on January 17, 2020 (January 17, 2021) by ServerOk

Create virtual machine (VPS) in Microsoft Hyper-V […]

Identify virtual machine technology

Posted on November 6, 2019 (August 24, 2020) by ServerOk

virt-what is a shell script which can be used to detect if the program is running in a virtual machine. It will identify what VM technology is used for current VM. For example KVM, Xen, HyperV etc. On CentOS 7, install virt-what with

yum -y install virt-what

1	yum -y install virt-what

On Debian/Ubuntu

apt install virt-what

1	apt install virt-what

Example See VPS […]