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📜 Used cPouta quota script

Summary
This script shows you how much of your cPouta project quota you have used and how much you have left. It uses the openstack, cinder and awk commands, which must be available in your computing environment.
Internet
https://a3s.fi/cgi/quota.sh

Code

Disclaimer of Warranty

The software is provided "as is", without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and noninfringement. In no event shall the authors or copyright holders be liable for any claim, damages or other liability, whether in an action of contract, tort or otherwise, arising from, out of or in connection with the software or the use or other dealings in the software.

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#!/bin/bash

handle_error() {
    echo "Error: $1" >&2
    exit 1
}

for cmd in openstack cinder awk; do
    command -v "$cmd" >/dev/null 2>&1 || handle_error "Required command \
    '$cmd' is not available."
done

# Specify the project ID
if [ -z "$OS_PROJECT_NAME" ]; then
    echo "Please enter the name of the project in form of 'project_xxxxxxx:'"
    read -r project_name
else
    project_name=$OS_PROJECT_NAME
fi
project_id=$(openstack project list | awk -v pname="$project_name" \
'$4==pname {print $2}' || handle_error "Failed to retrieve the project ID for \
'$project_name'.")

echo "Available resources in ${project_name} (ID: ${project_id})"
(openstack limits show --absolute | awk '
/maxTotalRAMSize/ {maxram = $4}
/totalRAMUsed/ {usedram = $4}
/maxTotalInstances/ {maxins = $4}
/totalInstancesUsed/ {usedins = $4}
/maxTotalCores/ {maxcpu = $4}
/totalCoresUsed/ {usedcpu = $4}
END { print "    Instances: " maxins - usedins "/" maxins "\n" \
"    vCPUs: " maxcpu - usedcpu "/" maxcpu "\n" \
"    RAM: " maxram - usedram "/" maxram }') || handle_error "Failed to parse \
available computing resources for the project '$project_name'."

(cinder quota-usage $project_id 2>&1 | awk '
/snapshots[[:space:]]/ {usedsnap = $4; maxsnap = $8}
/volumes[[:space:]]/ {usedvol = $4; maxvol = $8}
END { print "    Volumes: " maxvol - usedvol "/" maxvol "\n" \
"    Snapshots: " maxsnap - usedsnap "/" maxsnap }') || handle_error \
"Failed to parse available storage resources for the project '$project_name'."