Docker constraints

Create a service on manager node only

docker service create --constraints node.role==manager <image_name>

Remove a constraint and add a new constraint

docker service update --constraint-rm <Constraint added on service> --constraint-add <new_constraint> <service_name>

In yml file

version: "3.1"

services:

mysqldb:

image: mysql:latest

environment:

MYSQL_ROOT_PASSWORD: "mypassword"

MYSQL_DATABASE: "mysqldb"

deploy:

replicas: 1

placement:

constraints:

- node.labels.region == east-1-d

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