Hyrax docker images are not responding to SIGTERM

[ndp-opendap]

When we run our docker containers on rocky-8, when we try to stop the container like this:

docker rm -f "$HYRAX_NAME"

We get this warning:

WARN[0010] StopSignal SIGTERM failed to stop container hyrax in 10 seconds, resorting to SIGKILL 

Which is suboptimal - waiting 10 seconds makes things super slow.

Lets explore adding some signal handling to our various entrypoint.sh files:

Here's a Google AI suggestion:

#!/bin/bash

# Define a function to handle the SIGTERM signal
cleanup_on_term() {
    echo "Caught SIGTERM! Performing cleanup..."
    # Add your cleanup commands here, e.g., removing temporary files
    rm -f /tmp/my_temp_file.txt
    exit 0 # Exit cleanly after cleanup
}

# Register the cleanup_on_term function to be executed when SIGTERM is received
trap cleanup_on_term SIGTERM

echo "Script started. Running for a while..."
# Simulate some work
sleep 60

echo "Script finished normally."

I think if we are not concerned with a cleanup activity this could be reduced to just:

function quitting_time(){ exit 0; }

trap quitting_time SIGTERM

[jgallagher59701]

OK. This looks lie a good idea!