QM Create using the next available VMID? (CLI)

[nmiller0113]

I do most of my creation/cloning of VMs from the CLI and with Ansible. I was wondering if there was a way to I don't have to explicitly define the new vmid. When working in the WebUI it will always suggest the next vmid to use, so I was wondering if there was a way to take advantage of that logic in the CLI and not have to define it each time I create/clone a VM? I'm hoping I'm just missing something and there is a way that to make it automatically use the next available from the CLI. Thanks!

 

[bbgeek17]

there is no way, to make existing command auto-select ID. You need to enhance your procedure to get the ID from the cluster and then use it in create:
https://forum.proxmox.com/threads/next-availale-vmid-and-available-templates-through-api.14839/
The GUI takes advantage of that API to suggest the ID.

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[nmiller0113]

Thank you so much @bbgeek17! That's exactly what I needed!

 

[bhaskaraba]

I use the following snippet to calculate the next available id:

# List all the existing VM IDs in-use
head="VMID"
idlist=$(qm list | awk '{print $1}' | awk -v val="$head" '$1 != val {print}' | sort)

# Query the last ID among these
lastid=$(echo ${idlist} | awk '{print $NF}')

# Increment it to get the next available ID
newid=$(expr ${lastid} \+ 1)

You may additionally check for boundaries (like $newid > 999999999).

 

[VictorSTS]

# List all the existing VM IDs in-use
idlist=$(qm list | awk '{print $1}' | awk -v val="$head" '$1 != val {print}' | sort)

Keep in mind that qm will list VMs on the server you run the command on. Will not list VMs on other nodes of your cluster. IMHO, it's a lot easier to just use newId="$(pvesh get /cluster/nextid)" as it will check all IDs in the cluster.

 

[bhaskaraba]

Keep in mind that qm will list VMs on the server you run the command on. Will not list VMs on other nodes of your cluster. IMHO, it's a lot easier to just use newId="$(pvesh get /cluster/nextid)" as it will check all IDs in the cluster.

Thanks for suggesting this @VictorSTS.