[PVE-User] fast way to get all vm names via pvesh?

[Thomas Lamprecht]

On 12/15/2016 11:35 AM, IMMO WETZEL wrote:
> Hi
>
> Thats my current script to get all vm names from the cluster. Afterwards I check the new name against the list to prevent errors.
>
> #!/usr/bin/env bash
> nodes=$(pvesh get  /nodes/ 2>/dev/null  | sed -n -E '/\"id\"/ s/.*:\s\"(.*)\".*/\1/p' | sed -n -E 's/node/nodes/p' )
> vms=$(for i in $nodes ; do vms=$(pvesh get $i/qemu/ 2>/dev/null | sed -n -E '/vmid/ s/.*:\s(.*[^\s]).*/\/qemu\/\1/p') ; for q in $vms ; do echo $i$q ; done  ; done )
> for i in $vms ; do pvesh get $i/config 2>/dev/null | sed -n -E '/\"name\"/ s/.*:\s\"(.*[^\"])\".*/\1/p' | xargs echo "vm $i has name"  ; done
>
> But its so SLOOOOOWWWWW
>
> Any better ideas ?

By factor 10 faster than a pvesh call would be the following "one liner":

# shopt -s globstar; for i in /etc/pve/nodes/**/{qemu-server,lxc}/*; do  
grep -oP '(?<=name:)\s*(\S+)' "$i"; done

shopt -s globstar is for '**' only and could be circumvented if necessary.