Chapter 10

1. The correct answer is:

$ docker swarm init [--advertise-addr <IP address>]

The --advertise-addr is optional and only needed if you the host have more than one IP address.

2. On the worker node that you want to remove execute: $ docker swarm leave
   On one of the master nodes execute the command $ docker node rm -f <node ID>
   where <node ID> is the ID of the worker node to remove.
3. The correct answer is:

$ docker network create \
    --driver overlay \
    --attachable \
    front-tier

4. The correct answer is:

$ docker service create --name web \
   --network front-tier \
   --replicas 5 \
   -p 3000:80 \
   nginx:alpine

5. The correct answer is:

$ docker service update --replicas 3 web