Service

In Hyper, a Service is an abstraction which defines a logical set of containers in a single (private) network and a policy by which to access them. The set of containers targeted by a Service is determined by labels.

As an example, consider an image-processing backend which is running with 3 replicas. Those replicas are fungible - frontends do not care which backend they use. While the actual containers that compose the backend set may change, the frontend clients should not need to be aware of that or keep track of the list of backends themselves. The Service abstraction enables this decoupling.

Every service will receive an internal IP address which can only be accessed within the network where the service resides. For public access, a floating IP address needs to be attached by attach-fip command.

Currently, service supports four different protocols:

• tcp tcp traffic ---> service ---tcp---> containers

• http http traffic ---> service ---http---> containers

• https https traffic ---> service ---https---> containers

• httpsTerm https traffic ---> service ---http---> containers

Examples

Create a HTTP service:

$ hyper service create --service-port=80 --label=app=nginx --name=http --replicas=3 nginx
http

Create a HTTPS termination service:

First gets a https certificate from certificate:

$ certbot certonly --standalone -d yourdomain.com
$ cat fullchain.pem privkey.pem > https-service.pem

Then create a service with protocol httpsTerm:

$ hyper service create --service-port=443 --container-port=80 --label=app=nginx --name=https --replicas=3 --ssl-cert=https-service.pem --protocol=httpsTerm nginx
https

List service:

$ hyper service ls
Name         FIP    Containers                        Status              Message
http                e71092036d68, 92b070136371        active              Scaling complete

Attach an allocated floating IP to a service:

$ hyper service attach-fip --fip=6.6.6.6 http
http

Scale the service to more replicas:

$ hyper service scale http=8
http

Rolling update the service to new image:

$ hyper service rolling-update --image httpd http
http