docker cassandra graceful shutdown and safe restart

.bash_aliases

alias shutdown="cass-gracefulStopDatabase-and-reboot"

.bashrc

cass-gracefulStopDatabase-and-reboot() {
    logger -s "ob3 - Cassandra database docker container is gracefully stopping....."
    docker exec -it MYCASSANDRACONTAINERNAME nodetool flush
    docker exec -it MYCASSANDRACONTAINERNAME nodetool stopdaemon
    #dont stop docker database or it wont automatically restart  on reboot
    logger -s "ob3 - C* stopped but container still running.  Restart with docker stop database and docker start database" 
    #don't just use shutdown as we have aliased that and it will loop...
    #continue shutdown/restart
    /usr/sbin/shutdown $1 $2
}

docker-cassandra-safe-restart

Read-me

A method to safely stop Cassandra running in a Docker container before proceeding with reboot.
There may be better ways using init.d but we do want to ensure that C* stops before we get on with anything else, and 
This method achieves that purpose

After editing your bashrc and aliases file source to load new config:
source ~/.bashrc