Service¶
Use services when you want to expose a set of pods using a stable network identity. They can also be used for externalizing endpoints to clients outside of the kubernetes cluster.
Selectors¶
Services must be configured with selectors that tell it which pods should it serve. The most common selector method is using labels.
import * as k from 'cdk8s';
import * as kplus from 'cdk8s-plus-27';
const app = new k.App();
const chart = new k.Chart(app, 'Chart');
const frontends = new kplus.Service(chart, 'FrontEnds');
// this will cause the service to select all pods with the 'run: frontend' label.
frontends.select(kplus.LabelSelector.equals('run', 'frontend'));
Ports¶
Ports that the service will listen and redirect to can be configured like so:
import * as k from 'cdk8s';
import * as kplus from 'cdk8s-plus-27';
const app = new k.App();
const chart = new k.Chart(app, 'Chart');
const frontends = new kplus.Service(chart, 'FrontEnds');
// make the service bind to port 9000 and redirect to port 80 on the associated containers.
frontends.bind({port: 9000, targetPort: 80)