How to scale services with Docker Swarm?

Docker Swarm offers several ways to scale services, making it ideal for deploying and managing services across a multitude of servers. Here are the steps to scale services with Docker Swarm:

1. Initialize the Swarm: The first step is to initialize Docker Swarm. You can do this by executing the command `docker swarm init —advertise-addr `. This would initialize the current node as a manager node.

1. Join Other Nodes to the Swarm: Run the `docker swarm join-token worker` command on a manager node and copy the resulting command. Run this copied command on any node you want to add as a worker to the Swarm.

1. Create a Service: Creating a service can be done with the `docker service create` command. For example `docker service create —name my_service -p 80:80 my_image` will create a service named my_service using the my_image Docker image.

1. Scaling a Service: The `docker service scale` command enables you to scale services up or down to meet the needs of your application. For instance, `docker service scale my_service=5` would scale the service named my\_service to 5 replicas. Docker Swarm automatically load balances requests between these instances.

1. Inspecting a Service: You can use the `docker service inspect —pretty my_service` command to inspect a service. This will provide details about the specific service including the number of replicas, update configuration, and more.

1. Updating a Service: The `docker service update` command allows you to update different aspects of a service. For instance, you could use this command to change the number of service replicas or update the image used for a service.

1. Removing a Service: To remove a service from Docker Swarm, use the `docker service rm my_service` command.

Remember, it is good practice to monitor the state of your Swarm and services regularly. The `docker service ls` command will show you the status of all services in the Swarm.

Also, keep continuous integration (CI) and continuous delivery (CD) practices in mind when creating your services, this will allow you to easily update your applications and scale your services up and down.

Make sure the Docker daemon is running on all the nodes participating in the swarm and all Firewall rules are properly configured to allow traffic in accordance with your services.