Created
January 7, 2024 16:47
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Monitor kubevirt live migration progress in the terminal
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#!/usr/bin/env bash | |
# usage | |
# kubevirt-monitor-live-migration.sh my-namespace/my-vm | |
# | |
namespace_vm=${1?vm name} | |
vm=${namespace_vm##*/} | |
namespace=${namespace_vm%%/*} | |
bar_size=40 | |
bar_char_done="#" | |
bar_char_todo="-" | |
bar_percentage_scale=2 | |
#export KUBECONFIG=/tmp/kubeconfig | |
function show_progress { | |
current="$1" | |
total="$2" | |
# calculate the progress in percentage | |
percent=$(bc <<< "scale=$bar_percentage_scale; 100 * $current / $total" ) | |
# The number of done and todo characters | |
done=$(bc <<< "scale=0; $bar_size * $percent / 100" ) | |
todo=$(bc <<< "scale=0; $bar_size - $done" ) | |
# build the done and todo sub-bars | |
done_sub_bar=$(printf "%${done}s" | tr " " "${bar_char_done}") | |
todo_sub_bar=$(printf "%${todo}s" | tr " " "${bar_char_todo}") | |
# output the bar | |
echo -ne "\rProgress : [${done_sub_bar}${todo_sub_bar}] ${percent}%" | |
if [[ ${total} -eq ${current} ]]; then | |
echo -e "\nDONE" | |
fi | |
} | |
lastDataProcessed=0 | |
# Read events from stdin | |
#oc logs -f -n "${namespace}" -l "vm.kubevirt.io/name=${vm},!kubevirt.io/migrationJobUID" \ | |
oc logs -f -n "${namespace}" -l "vm.kubevirt.io/name=${vm}" \ | |
| while read -r event; do | |
# Reset values | |
TimeElapsed=0 | |
DataProcessed=0 | |
# DataRemaining='' | |
DataTotal=0 | |
MemoryProcessed=0 | |
MemoryRemaining=0 | |
MemoryTotal=0 | |
# MemoryBandwidth='' | |
# DirtyRate='' | |
# Iteration='' | |
# PostcopyRequests='' | |
# ConstantPages='' | |
# NormalPages='' | |
# NormalData='' | |
# ExpectedDowntime='' | |
# DiskMbps='' | |
message=$(echo "${event}" | jq -r .msg) | |
if [[ ${message} != "Migration info for"* ]] ; then | |
# echo noop | |
continue | |
fi | |
stats=$(echo "${message}" | sed -E 's/Migration info for [a-f0-9-]+: //' | sed -e 's/ /\n/g' -e 's/:/=/g') | |
eval "${stats}" | |
# Clean the data | |
DataProcessed="${DataProcessed%MiB}" | |
DataTotal=${DataTotal%MiB} | |
TimeElapsed=${TimeElapsed%ms} | |
MemoryProcessed=${MemoryProcessed%MiB} | |
MemoryRemaining=${MemoryRemaining%MiB} | |
MemoryTotal=${MemoryTotal%MiB} | |
diffDataProcessed=$((DataProcessed - lastDataProcessed)) | |
diffTimeElapsed=$(bc <<< "scale=$bar_percentage_scale; (${TimeElapsed} - ${lastTimeElapsed}) / 1000") | |
lastDataProcessed=${DataProcessed%MiB} | |
lastTimeElapsed=${TimeElapsed} | |
mps=$(bc <<< "scale=$bar_percentage_scale; $diffDataProcessed/$diffTimeElapsed") | |
echo " rate $mps MiB/sec" | |
# # Draw the progress bar | |
# show_progress "${DataProcessed}" "${DataTotal}" | |
show_progress "$((MemoryTotal - MemoryRemaining))" "${MemoryTotal}" | |
done | |
# Add a new line after the progress bar is complete | |
echo |
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