Controlling services

Now that we have our personal cloud running with a microservice as a service, we need to learn how to control it. First, we will look at how we can scale these instances, then at how we can access the logs, and finally, how we can control these instances independently.

Scaling instances

Let's first look at which services we have to run with the following command:

docker service ls

This should show us our service instances:

ID            NAME           MODE        REPLICAS  IMAGE                        PORTS
syqgugo598xn  hello-service  replicated  1/1       localhost:5000/hello:latest  *:8080->8080/tcp
os5j0iw1p4q1  registry       replicated  1/1       registry:latest              *:5000->5000/tcp

Here, we see that we have 1 replica for hello-service. Let's increase it with the following command:

docker service scale hello-service=3

After a few seconds, we can list our instances again:

docker service ls

 

This should now show:

ID            NAME           MODE        REPLICAS...