sidekiq-container.yaml

sidekiq:
  terminationGracePeriodSeconds: 1200 # Max time to wait for sidekiq jobs to finish is 20 minutes
  container:
    command:
      - bundle
      - exec
      - sidekiqswarm
    preStopCMD: ["/bin/bash","/app/bin/sidekiq_graceful_shutdown.sh"]

sidekiq_graceful_shutdown.sh

#!/bin/bash

# Helper function for printing logs with timestamp
echo_time() {
    date +"[%H:%M:%S] [Sidekiq-graceful-shutdown] $*"
}

kill -TSTP 1
SIDEKIQ_BUSY=true

while $SIDEKIQ_BUSY ; do
    SIDEKIQ_BUSY=false
    sidekiq_pids=$(ps aux | grep '[s]idekiq' | grep 'busy' | awk '{print $2}')
    for pid in $sidekiq_pids ; do
        IS_SIDEKIQ_DONE=$(ps -f --pid $pid | grep -v PID | grep -E "\[0 of [0-9]+ busy\]" > /dev/null)$?
        if [ $IS_SIDEKIQ_DONE -ne 0 ]; then
    	    echo_time "Sidekiq is still busy"
            sleep 5
            SIDEKIQ_BUSY=true
        fi
    done
done

echo_time "TERM signal - Shutting down sidekiq"
kill -TERM 1 2>&1 > /dev/null