Hands-On Microservices with Kotlin

Adding a service

Docker service is how we can control the Dockers in our cloud. A service is a set of instances of an existing Docker image that we can manage. We will create a new service based on the Docker alpine image with this command:

docker service create --replicas 1 --name helloworld alpine ping google.com

We can now check how many instances of that service we have in our cloud by using the following command:

docker service ls

This command should give an output that looks something like:

ID            NAME        MODE        REPLICAS  IMAGEc9f635ec38fb  helloworld  replicated  1/1       alpine:latest

And if we want to, we can inspect our services with the following command:

docker service inspect --pretty helloworld

This should show the following as output:

ID: k5krqfpx8e15w91ojmftri9oa ...