What is qemu-guest-agent

silvachr

New Member
Jul 23, 2023
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São Paulo - Brazil
hello gents,

Question. As for "qemu-guest-agent" does this have to be installed on Proxmox for the feature to work? I explain. Creating a vm in a first configuration returned an error in "qemu" and reading the guide I see that the installation is necessary in every VM.

good afternoon,

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As for "qemu-guest-agent" does this have to be installed on Proxmox for the feature to work?
The agent should only be installed inside a Virtual Machine. It has no purpose on bare metal or hypervisor, unless hypervisor is nested.
Creating a vm in a first configuration returned an error in "qemu"
You'd need to be more specific.
reading the guide I see that the installation is necessary in every VM
Agent is optional, it provides additional connectivity link between Hypervisor and VM, which you may or may not need. Most people probably dont need it.

If the agent is installed, then a special device needs to be enabled for the VM in hypervisor settings, as shown in your screenshot.


Blockbridge : Ultra low latency all-NVME shared storage for Proxmox - https://www.blockbridge.com/proxmox
 
I kindly refer you to the Proxmox VE manual (as the Wiki is usually out of date):
The QEMU Guest Agent is a service which runs inside the VM, providing acommunication channel between the host and the guest. It is used to exchange information and allows the host to issue commands to the guest. ...
Enable the QEMU Guest Agent option in the Proxmox web GUI only if you have installed and enabled the QEMU Guest Agent software inside the VM. Not all operating systems provide a QEMU Guest Agent.
 
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Agent is optional, it provides additional connectivity link between Hypervisor and VM, which you may or may not need. Most people probably dont need it.
Primarily useful if you want to rely on your snapshot-mode backups, so the PVE host can tell the guestOS to flush the write caches before doing the backup so you get consistent backups.
 

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