execute a command within docker swarm service

Question

1. Initialize swarm mode:

   root@ip-172-31-44-207:/home/ubuntu# docker swarm init --advertise-addr 172.31.44.207
   
   Swarm initialized: current node (4mj61o         
   
   
           

Answer 1

You can execute commands by filtering container name without needing to pass the entire swarm container hash, just by the service name. Like this:

docker exec $(docker ps -q -f name=servicename) ls