Create Virtual Machine from a template

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Revision as of 06:26, 13 March 2025 by Sailor (talk | contribs) (→qm clone)
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Introduction

This is not a deep dive in to ansible or similar but a simple quick and dirty guide to creating a new VM from a template and configuring some of the networking with cloud init.


qm clone

To create a new host from your template with the specified IP address, gateway, DNS server, and search domain, you can use the Proxmox command-line interface (CLI) with the qm clone command and appropriate Cloud-Init parameters.

Here's how you can do it:

Using the qm clone Command: 

qm clone <template_vmid> <new_vmid> --name <new_hostname> --ipconfig0 "ip=192.168.100.26/24,gw=192.168.100.1" --nameserver 192.168.110.11 --searchdomain seaoffate.local

Explanation: 

qm clone <template_vmid> <new_vmid>:

This is the base command to clone a VM.

  • Replace <template_vmid> with the ID of your template VM.
  • Replace <new_vmid> with the desired ID for the new VM.
  • --name <new_hostname>:
  • Replace <new_hostname> with the desired hostname for the new VM.
  • --ipconfig0 "ip=192.168.100.26/24,gw=192.168.100.1":
  • This sets the IPv4 configuration for the first network interface (eth0 or similar).
  • ip=192.168.100.26/24 sets the IP address and netmask.
  • gw=192.168.100.1 sets the gateway address.
  • --nameserver 192.168.110.11:
  • This sets the DNS server address.
  • --searchdomain seaoffate.local:

This sets the search domain.


Example:

If your template VM ID is 100, and you want to create a new VM with ID 101 and hostname "newhost," the command would be:

Bash 

qm clone 100 101 --name newhost --ipconfig0 "ip=192.168.100.26/24,gw=192.168.100.1" --nameserver 192.168.110.11 --searchdomain seaoffate.local

Important Notes:

  • Cloud-Init: This command assumes that your template VM has Cloud-Init installed and configured.
  • Network Interface Name: The network interface name might vary. If your VM uses a different interface name (e.g., ens3), you might need to adjust the Cloud-Init configuration accordingly.
  • Testing: After creating the new VM, verify that the IP address, gateway, DNS server, and search domain are correctly configured.
  • Proxmox User Permissions: The user running this command must have sufficient permissions to create VMs.
  • Firewall: Ensure that your firewall allows network traffic to and from the new VM.
  • DHCP: Make sure that the IP address does not conflict with any IP addresses assigned by a DHCP server.

By using this command, you can easily create new VMs from your template with the desired network configuration.

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