How to flush all of the cached contents of Docker memcached?

Question

How to flush all of the cached contents of Docker container memcached from command line without rstarting memcached?

Answer 1

docker exec -it $MEMCACHE_CONTAINER_ID bash -c "echo flush_all > /dev/tcp/localhost/11211"

Answer 2

Assuming that you have the memcahed port 11211 exposed. You can flush the cache via either telnet or nc and sending flush_all

echo flush_all | nc localhost 11211
OK

You can replace localhost, with the machine hostname if you are not executing the command on the same machine where the container is running.