pct is a command line tool to manage containers (LXC) in proxmox server.
Here are some useful commands
pct enter 100
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 100pct documentation available at
https://pve.proxmox.com/pve-docs/pct.1.html
See proxmox
To find versions of proxmox packages
pveversion -v
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:~#
Config for KVM VMs stored in folder
/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/.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
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"
Once this is done, you need to shutdown and start the virtual machine. Just reboot won’t work.
root@PAR-199235:~# virsh vncdisplay kali-linux 127.0.0.1:0 root@PAR-199235:~# virsh shutdown kali-linux Domain kali-linux is being shutdown root@PAR-199235:~# virsh list --all Id Name State ----------------------------- - kali-linux shut off root@PAR-199235:~# virsh start kali-linux Domain kali-linux started root@PAR-199235:~# virsh vncdisplay kali-linux :0 root@PAR-199235:~#
See Linux KVM
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
To check Vagrant version
vagrant --version
See Vagrant
To install Linux KVM hypervisor on CentOS 8, run
dnf install qemu-kvm
Install libvirtd
dnf install libvirt-daemon libvirt-daemon-kvm libvirt-client
Enable libvirtd to start on boot
systemctl enable libvirtd
Start libvirtd
systemctl start libvirtd
To see status, run
systemctl status libvirtd
Install virt-install
dnf install virt-install
Now you have Linux KVM installed. You can use virt-install or Virt Manager to create virtual machine.
List available OS Templates in your server
vzpkg list -O vzpkg list -O --with-summary
To create a container, run
prlctl create MyCT --vmtype ct --ostemplate centos-7-x86_64
Lit all vms
prlctl list -a
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-whatOn Debian/Ubuntu
apt install virt-whatExample
See VPS
Vagrant allows you to quickly create virtual machines.
You can download vagrant boxes from
https://app.vagrantup.com/boxes/search
Vagrant private_network can’t ping
Install vagrant in Debian/Ubuntu
apt install vagrant -y
You may also need to install virtualbox
apt install virtualbox
To update vagrant boxes, run
vagrant box update
To list all available vagrant boxes
vagrant box list
To create a snapshot
vagrant snapshot save first-snapshot
To list available snapshots
vagrant snapshot list
To disable No valid subscription notice from proxmox, edit file
vi /usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js
Find
if (data.status !== 'Active') {
This is on line 380. inside function checked_command
Replace with
if (false) {
Resart pveproxy
systemctl restart pveproxy
virt-manager is a GUI tool to manage virtual machines.
On CentOS desktop, install it with
yum install virt-managerFor installing on Ubuntu, see Install virt-manager on Ubuntu
To connect to remote KVM server from virt-manager, Go to File > Add Connection
If SSH port is not 22, use IP:PORT format to connect to KVM installation.
Once connected, you will see all VMs. Here we have 1 VM with name “foo”
You can double click on a VM to access its console/desktop.
See kvm