K
Q

Where can I see list of services registered in Kubernetes Discovery?

12/23/2020

In case of using eureka (+ Spring Boot) you can reach special endpoint where list of currently registered instances can be found. E.g.: Instances currently registered with Eureka

Does Kubernetes service discovery have such endpoint or may be other mechanism to see all currently registered instances? UPD: Does kubernetes api have any possibilities to do this, may be via kubectl?

-- Alex
discovery
kubernetes
microservices
netflix-eureka
spring-cloud

Similar Questions

Nginx Ingress for Kubernetes "Connection refused"
how to get list of pod names using kubernetes rest api (jsonpath)
what is the difference in memory pressure and disk pressure in kubernetes
How does statefulset and headless service works-K8s
Strange behavior of Kubernetes + AWS ELB

3 Answers

12/23/2020

Kubernetes has an HTTP-based API that you can interact with in many ways (e.g.: kubectl), of course you can use curl too.
Here's how: Access Clusters Using the Kubernetes API

If you are curious about your pods, you can do:

  • kubectl get pods or kubectl get pods -o json
  • curl http://localhost:8080/api/v1/pods

If you mean services (and their registered targets):

  • kubectl get services or kubectl services pods -o json
  • curl http://localhost:8080/api/v1/services
-- Jonatan Ivanov
Source: StackOverflow
7/9/2021

I managed to solve problem after a while.

  1. Add endpoint in of your microservices. Example here
  2. Add roles to your kubernetes cluster:
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  namespace: yours
  name: service-reader
rules:
  - apiGroups: [""] # "" indicates the core API group
    resources: ["services"]
    verbs: ["get", "watch", "list"]

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: service-reader-pod
subjects:
  - kind: ServiceAccount
    name: default
    namespace: yours
roleRef:
  kind: ClusterRole
  name: service-reader
  apiGroup: rbac.authorization.k8s.io
-- Alex
Source: StackOverflow
12/23/2020

No. Eureka is a service discovery AND registration system. The spring cloud implementation of service discovery on kubernetes only reads from the kubernetes api. You could probably get the information via kubectl.

-- spencergibb
Source: StackOverflow