Docker Swarm

• Deploy stack from compose file

docker stack deploy --compose-file docker-compose.yml stackdemo

• Delete stack

docker stack rm stackdemo

• Add a secret

echo "This is an external secret" | docker secret create my_external_secret -
# or
docker secret create my_external_secret secret_file_path

• Remove a secret

docker secret rm my_external_secret

• Use a secret in compose file

version: '3.7'

services:
  web:
    image: nginxdemos/hello
    secrets:                    # secrets block only for 'web' service
     - my_external_secret
     - my_file_secret

secrets:                        # top level secrets block
  my_external_secret:
    external: true
  my_file_secret:
    file: my_file_secret.txt

• Update a service

docker service update --image DOCKER_IMG SERVICE_NAME