podlog.sh

watched=()
pids=()
contains() {
    local value=$1;
    for pod in "${watched[@]}"
    do
        if [[ $pod == $value ]]
        then
            echo "1"
        fi
    done

    echo "0"
}

STOP=false
terminate() {
    echo "Stopping";
    STOP=true
    for pid in ${pids[@]}
    do
        kill -9 $pid || true
    done
}
trap "terminate" SIGTERM SIGKILL

while [[ $STOP == "false" ]]
do
    pods='\n' read -r -a array <<< $(kubectl get pods -l app=$1 -o name | sed 's/pods\///g')
    for pod in "${array[@]}"
    do
        if [[ $(contains $pod) == 0 && $(kubectl get pod $pod | rg "Running" | rg "1/1") ]]
        then
            cat <(kubectl logs $pod -f --tail 500) & pids+=($!)
            echo "Following $pod"
            watched+=($pod)
        fi
    done

    sleep 1
done