Using Kubernetes Ingress Controller from scratch

Create two services(namely node1, node2)and a ingress controller. the ingress controller will route /gg1 to node1, /gg2 to node2
step1: clone my repo :)
step2: Create deployment
use kubectl to create a deployment
kebectl create -f deployment1-config.yaml
repeat the above procedure and replace test-ingress-node1 with test-ingress-node-2

use command kubectl get pods to check , it should be like this

NAME                                  READY     STATUS    RESTARTS   AGE
test-ingress-node-1-379438432-gv98l   1/1       Running   0          18h
test-ingress-node-2-564118882-mzjx1   1/1       Running   0          17h

step3: Create service connecting deployment

kubectl expose deployment test-ingress-node-1 --target-port=8080 --type=NodePort

repeat the above procedure and replace test-ingress-node1 with test-ingress-node-2

use kubectl get services to check, it should look like this
NAME                  CLUSTER-IP       EXTERNAL-IP   PORT(S)    AGE
test-ingress-node-1   10.123.245.45    <nodes>       8080/TCP   16h
test-ingress-node-2   10.123.245.144   <nodes>       8080/TCP   15h

step4: Create Ingress controller
kubectl run nginx --image=nginx --port=80


kubectl expose deployment nginx --target-port=80 --type=NodePort

check all pods is working
NAME                                  READY     STATUS    RESTARTS   AGE
nginx-2032906785-fcjgz                1/1       Running   0          17h
test-ingress-node-1-379438432-gv98l   1/1       Running   0          18h
test-ingress-node-2-564118882-mzjx1   1/1       Running   0          18h

Step5: Setup Ingress Resource

kubectl create -f ingress-config.yaml

it would expose an external ip, you can check the resource by
kubectl get ing, it should look like this
NAME                    HOSTS     ADDRESS           PORTS     AGE
test-node-adv-ingress   *         10.247.183.150   80        16h

from here 10.247.183.150 will be the external ip which is public accessible.

and you can use kubectl describe ingress test-node-adv-ingress to view its behavior, like this:
Name:   test-node-adv-ingress
Namespace:  default
Address:  107.178.249.214
Default backend: test-ingress-node-1:8080 (10.120.0.7:8080)
Rules:
  Host Path Backends
  ---- ---- --------
  *
     /gg1  test-ingress-node-1:8080 (10.120.0.7:8080)
     /gg2  test-ingress-node-2:8080 (10.120.0.9:8080)


you can check /gg1 and /gg2 is route to different node

PLEASE NOTE 4 THAT: it may take 5–8 minutes for the node to work with ingress, please be patient.

NOTE 2: the ingress needed a root url (‘/’) send 200 ok to work