Kubernetes rsync wrapper

krsync.sh

#!/bin/bash

# Source: https://serverfault.com/a/887402/169782

# Usage:
# krsync -av --progress --stats src-dir/ pod<@namespace>:/dest-dir

if [ -z "$KRSYNC_STARTED" ]; then
    export KRSYNC_STARTED=true
    exec rsync --blocking-io --rsh "$0" $@
fi

# Running as --rsh
namespace=''
pod=$1
shift

# If user uses pod@namespace, rsync passes args as: {us} -l pod namespace ...
if [ "X$pod" = "X-l" ]; then
    pod=$1
    shift
    namespace="-n $1"
    shift
fi

exec kubectl $namespace exec -i $pod -- "$@"