Linux bash script that can be used to keep Pipeline 2 running. It will start Pipeline 2 if it is not running, and kill it if it is not responding. You might need to install curl and screen.

pipeline-watchdog.sh

#!/bin/bash -x

# Change APPDATA/ENGINE_HOME/WEBUI_HOME if necessary,
# and set this script up as a cron job, for instance:
# */1 * * * * $HOME/pipeline-watchdog.sh >/tmp/pipeline-watchdog.log 2>&1

PIPELINE_APPDATA="$HOME/.daisy-pipeline"
PIPELINE_ENGINE_HOME="$HOME/daisy-pipeline"
PIPELINE_WEBUI_HOME="$HOME/daisy-pipeline-webui"

curl http://localhost:8181/ws/alive
PIPELINE_ENGINE_RUNNING="$?" # 0 if running
PIPELINE_WEBUI_RUNNING="`screen -list | grep dp2-webui | wc -l`" # 1 if running
if [ "$PIPELINE_ENGINE_RUNNING" = "0" ] && [ "$PIPELINE_WEBUI_RUNNING" = "1" ] ; then
    echo "Pipeline 2 (engine and Web UI) is running as expected"
else
    echo "Pipeline 2 (engine or Web UI) is not running as expected"
    
    echo "Killing any non-responding instances of Pipeline 2..."
    screen -X -S dp2-webui kill
    screen -X -S dp2-engine kill
    killall -9 java
    
    echo "Starting Pipeline 2 core engine..."
    cd "$PIPELINE_ENGINE_HOME/bin/"
    screen -dmS dp2-engine ./pipeline2
    
    echo "Starting Pipeline 2 Web UI..."
    rm "$PIPELINE_APPDATA/webui/RUNNING_PID"
    cd "$PIPELINE_WEBUI_HOME/"
    screen -dmS dp2-webui ./start
fi