entrypoint.sh

#!/bin/bash

########################################################################
#
# Docker container entrypoint
#
########################################################################

echo ""
echo "Setting up the EWMS Task Pilot Container Environment..."

# grab env vars file and source
echo "----"
envfile="$PWD/ewms_htcondor_envfile.sh"
[ -f "$envfile" ] && source "$envfile"  # else, ok
printenv
echo "----"

# setup the directory exposed to all tasks -- this is done here instead of in Dockerfile so to work with singularity
export EWMS_PILOT_DATA_DIR_PARENT_PATH_ON_HOST="${EWMS_PILOT_DATA_DIR_PARENT_PATH_ON_HOST:-$PWD}"
mkdir -p "$EWMS_PILOT_DATA_DIR_PARENT_PATH_ON_HOST/ewms-pilot-data/"
mkdir -p "$EWMS_PILOT_DATA_DIR_PARENT_PATH_ON_HOST/ewms-pilot-data/data-hub"

# inspect the file system
echo "----"
echo "/"
ls -l /
echo "----"
echo "PWD: $PWD"
ls -l $PWD



if [[ "$_EWMS_PILOT_CONTAINER_PLATFORM" == "docker" ]]; then
    # check docker -- https://stackoverflow.com/a/48843074/13156561
    echo "----"
    if (! docker stats --no-stream > /dev/null 2>&1 ); then
        echo "Activating docker daemon..."
        dockerd > /var/log/dockerd.log 2>&1 & dockerd_pid="$!"
        i=0
        while (! docker stats --no-stream > /dev/null 2>&1 ); do
            # Docker takes a few seconds to initialize
            echo "Waiting for docker daemon to initialize..."
            # start up failed? -> break
            #    wait for 2s then, if dockerd_pid didn't exit with a non-0, continue on
            sleep 2 & sleeper_pid="$!"  # this should never fail (always exits 0)
            if ! wait -n $dockerd_pid $sleeper_pid; then
                # ^^^^^^ this returns on FIRST done
                echo "ERROR: docker daemon failed to activate"
                break
            fi
            # taking too long? -> break
            i=$((i+1))
            if [[ "$i" == "60" ]]; then
                break
            fi
        done
    fi
    docker info
fi

echo "----"
echo "Activating venv..."
source /app/entrypoint_venv/bin/activate

echo "╔══════════════════════════════════════════════════════════════════════════════════════╗"
echo "║                                                                                      ║"
echo "║        - - -       Welcome to the Task Pilot Container Environment       - - -       ║"
echo "║                                                                                      ║"
echo "║        - - -     Part of the Event Workflow Management System (EWMS)     - - -       ║"
echo "║                                                                                      ║"
echo "╠══════════════════════════════════════════════════════════════════════════════════════╣"
echo "║  Source: https://github.com/Observation-Management-Service/ewms-pilot                ║"
echo "║  Today:  $(date --rfc-3339=seconds)                                                   ║"  # spacing for command
echo "╠══════════════════════════════════════════════════════════════════════════════════════╣"
while read -r i; do printf "║  %-83s ║\n" "$i"; done <<< "$(pip show ewms-pilot)"  # pip-supplied info
echo "╠══════════════════════════════════════════════════════════════════════════════════════╣"
# OS info
printf "║  %-83s ║\n" "Operating System:  $(uname -o 2>/dev/null || echo 'N/A')"
printf "║  %-83s ║\n" "Kernel Name:       $(uname -s 2>/dev/null || echo 'N/A')"
printf "║  %-83s ║\n" "Kernel Release:    $(uname -r 2>/dev/null || echo 'N/A')"
printf "║  %-83s ║\n" "Kernel Version:    $(uname -v 2>/dev/null || echo 'N/A')"
printf "║  %-83s ║\n" "Machine:           $(uname -m 2>/dev/null || echo 'N/A')"
printf "║  %-83s ║\n" "Processor:         $(uname -p 2>/dev/null || echo 'N/A')"
printf "║  %-83s ║\n" "Hardware Platform: $(uname -i 2>/dev/null || echo 'N/A')"
printf "║  %-83s ║\n" "Hostname:          $(uname -n 2>/dev/null || echo 'N/A')"
echo "╠══════════════════════════════════════════════════════════════════════════════════════╣"
# docker/apptainer info
if [[ $_EWMS_PILOT_CONTAINER_PLATFORM == 'docker' ]]; then
    while read -r i; do printf "║  %-83s ║\n" "$i"; done <<< "$( echo 'Docker:' && echo && docker version || echo 'No docker info to display' )"
elif [[ $_EWMS_PILOT_CONTAINER_PLATFORM == 'apptainer' ]]; then
    while read -r i; do printf "║  %-83s ║\n" "$i"; done <<< "$( echo 'Apptainer:' && echo && echo 'Version: '$(apptainer version) || echo 'No apptainer info to display' )"
fi
echo "╚══════════════════════════════════════════════════════════════════════════════════════╝"

echo "Executing command: $@"

echo "----"
exec "$@"