BASH script to get a procfile from a Docker container for a given process

get_proc.sh

#!/bin/bash

PROCESS=$1
PROC_FILE=${2:-status}
CONTAINERS=$(docker ps -q)

for c in $CONTAINERS; do 
    PIDS=$(docker exec $c ps ax | egrep $PROCESS | egrep -v grep | awk '{print $1}') 
    if [[ ! -z "$PIDS" ]]; then 
        echo "==== $c" 
        for PID in $PIDS; do 
            echo "===="
            docker exec --user root $c cat /proc/$PID/$PROC_FILE 
        done 
        echo "====" 
    fi 
done