use stern across contexts

stern-all-contexts.sh

#!/usr/bin/env bash
set -o pipefail -o errexit

# use like:
# ./stern-all-contexts.sh <pod-name>
# or:
# EXCLUDE_CONTEXTS='docker-desktop|other-context' ./stern-all-contexts.sh <pod-name>

EXCLUDE_CONTEXTS=${EXCLUDE_CONTEXTS:-docker-desktop}

trap 'kill $(jobs -p)' EXIT

if ! echo "${@}" | grep -q "\-\-tail"; then
    set -- '--tail=1' "$@"
fi

for CONTEXT in $(kubectl config get-contexts -o name); do
    if [[ "${CONTEXT}" =~ ^${EXCLUDE_CONTEXTS}$ ]]; then
        continue
    fi
    stern --context="${CONTEXT}" "${@}" &
done

for PID in $(jobs -p); do
    wait ${PID}
done