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Bash script to show k8s PVC usage #k8s #kubernetes
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#!/usr/bin/env bash | |
NODESAPI=/api/v1/nodes | |
function getNodes() { | |
kubectl get --raw $NODESAPI | jq -r '.items[].metadata.name' | |
} | |
function getPVCs() { | |
jq -s '[flatten | .[].pods[].volume[]? | select(has("pvcRef")) | '\ | |
'{name: .pvcRef.name, capacityBytes, usedBytes, availableBytes, '\ | |
'percentageUsed: (.usedBytes / .capacityBytes * 100)}] | sort_by(.name)' | |
} | |
function column() { | |
awk '{ for (i = 1; i <= NF; i++) { d[NR, i] = $i; w[i] = length($i) > w[i] ? length($i) : w[i] } } '\ | |
'END { for (i = 1; i <= NR; i++) { printf("%-*s", w[1], d[i, 1]); for (j = 2; j <= NF; j++ ) { printf("%*s", w[j] + 1, d[i, j]) } print "" } }' | |
} | |
function defaultFormat() { | |
awk 'BEGIN { print "PVC 1K-blocks Used Available Use%" } '\ | |
'{$2 = $2/1024; $3 = $3/1024; $4 = $4/1024; $5 = sprintf("%.0f%%",$5); print $0}' | |
} | |
function humanFormat() { | |
awk 'BEGIN { print "PVC Size Used Avail Use%" } '\ | |
'{$5 = sprintf("%.0f%%",$5); printf("%s ", $1); system(sprintf("numfmt --to=iec %s %s %s | sed '\''N;N;s/\\n/ /g'\'' | tr -d \\\\n", $2, $3, $4)); print " " $5 }' | |
} | |
function format() { | |
jq -r '.[] | "\(.name) \(.capacityBytes) \(.usedBytes) \(.availableBytes) \(.percentageUsed)"' | | |
$format | column | |
} | |
if [ "$1" == "-h" ]; then | |
format=humanFormat | |
else | |
format=defaultFormat | |
fi | |
for node in $(getNodes); do | |
kubectl get --raw $NODESAPI/$node/proxy/stats/summary | |
done | getPVCs | format |
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