K
Q

Question

test round-robin in kubernetes

11/29/2017

Context: 2 Nodes with 3 Pods

Node-1:Pod-A,Pod-B Node-2:Pod-C

use NodePort to expose the service in my local virtual boxes(centos).

If I visit application by k8s service-clusterIP, I can see the round-robin is working among the 3 pods

If I visit application By Node-1, I didn't see the round-robin is working. only Pod-A is hit.

the round-robin is not working if access by Node IP? (the node have more than 1 pod)

10.144.39.* (company network)

192.168.* k8s network

Env: Mac laptop k8s cluster is hosted in the VM(3 instances:Master,Node-1,Node-2)

k8s clusters

Master

Node-1:Pod-A,Pod-B

Node-2:Pod-C

IP info: Master 10.144.39.107

Node-1: 10.144.39.108 192.168.84.128

Node-2: 10.144.39.109 192.168.247.0

Testcases:

1.send request from Mac env

step:

wget -qO- http://10.144.39.108:1651 (node-2 with 2 pods)

Result:

Round-Robin:only hit the Pod-A

2.send reqeuset from the master/node-1/node-2 VM (Master server)

step:

wget -qO- http://10.144.39.108:1651 (node-2 with 2 pods)

Result:

Round-Robin: only hit the Pod-A,Pod-B

3.send request from the cluster inside:

steps:

1.kubectl exec busybox -it /bin/sh

3.exit

Round-Robin: hit the Pod-A,Pod-B,Pod-C

-- mochsla

kubernetes