In this article we will go though the steps to deploy a nginx ingress controller on a Tanzu Kubernetes cluster (TKC) and create a simple ingress resource to test its basic functionality.
❯ gcc kg no
NAME STATUS ROLES AGE VERSION
tkc-control-plane-5m9hd Ready control-plane,master 36d v1.23.8+vmware.3
tkc-workers-6d8wc-5669d8bc79-76f2t Ready <none> 36d v1.23.8+vmware.3
tkc-workers-6d8wc-5669d8bc79-mtqh7 Ready <none> 36d v1.23.8+vmware.3
tkc-workers-6d8wc-5669d8bc79-xh2gz Ready <none> 36d v1.23.8+vmware.3
❯ gcc k apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.7.0/deploy/static/provider/cloud/deploy.yaml --namespace=ingress-nginx
namespace/ingress-nginx created
serviceaccount/ingress-nginx created
serviceaccount/ingress-nginx-admission created
role.rbac.authorization.k8s.io/ingress-nginx created
role.rbac.authorization.k8s.io/ingress-nginx-admission created
clusterrole.rbac.authorization.k8s.io/ingress-nginx created
clusterrole.rbac.authorization.k8s.io/ingress-nginx-admission created
rolebinding.rbac.authorization.k8s.io/ingress-nginx created
rolebinding.rbac.authorization.k8s.io/ingress-nginx-admission created
clusterrolebinding.rbac.authorization.k8s.io/ingress-nginx created
clusterrolebinding.rbac.authorization.k8s.io/ingress-nginx-admission created
configmap/ingress-nginx-controller created
service/ingress-nginx-controller created
service/ingress-nginx-controller-admission created
deployment.apps/ingress-nginx-controller created
job.batch/ingress-nginx-admission-create created
job.batch/ingress-nginx-admission-patch created
ingressclass.networking.k8s.io/nginx created
validatingwebhookconfiguration.admissionregistration.k8s.io/ingress-nginx-admission created
❯ gcc kg ns
NAME STATUS AGE
default Active 57d
external-dns Active 57d
ingress-nginx Active 17s
kube-node-lease Active 57d
kube-public Active 57d
kube-system Active 57d
vmware-system-auth Active 57d
vmware-system-cloud-provider Active 57d
vmware-system-csi Active 57d
❯
❯ gcc kg deployment,po,svc,ep -n ingress-nginx
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/ingress-nginx-controller 1/1 1 1 21h
NAME READY STATUS RESTARTS AGE
pod/ingress-nginx-admission-create-h4sbz 0/1 Completed 0 21h
pod/ingress-nginx-admission-patch-bw2fr 0/1 Completed 0 21h
pod/ingress-nginx-controller-5795977b8-nfrb8 1/1 Running 0 21h
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/ingress-nginx-controller LoadBalancer 10.96.114.127 10.186.124.41 80:30061/TCP,443:31417/TCP 21h
service/ingress-nginx-controller-admission ClusterIP 10.98.183.189 <none> 443/TCP 21h
NAME ENDPOINTS AGE
endpoints/ingress-nginx-controller 192.168.7.8:443,192.168.7.8:80 21h
endpoints/ingress-nginx-controller-admission 192.168.7.8:8443 21h
Now the nginx ingress controller is deployed. You can also see the service/ingress-nginx-controller has already got an external IP from NSX-T.
Note: gcc is an alias which points to my TKC kubeconfig file.
❯ alias gcc
gcc='KUBECONFIG=gckubeconfig'
❯
Lets create a sample deployment and expose it as a service under namespace ingress-nginx.
❯ gcc kubectl create deployment web --image=gcr.io/google-samples/hello-app:1.0 -n ingress-nginx
deployment.apps/web created
❯ gcc kubectl expose deployment web --type=NodePort --port=8080 -n ingress-nginx
service/web exposed
❯
❯ gcc k get deployments.apps web -n ingress-nginx
NAME READY UP-TO-DATE AVAILABLE AGE
web 1/1 1 1 28s
❯ gcc k get svc web -n ingress-nginx
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
web NodePort 10.105.243.33 <none> 8080:30750/TCP 28s
❯ gcc k get ep web -n ingress-nginx
NAME ENDPOINTS AGE
web 192.168.1.9:8080 39s
❯
Create a pod on the TKC and try to access the svc web from inside the pod. I've already deployed a nginx pod.
❯ gcc k get po nginx
NAME READY STATUS RESTARTS AGE
nginx 1/1 Running 0 96m
❯
❯ gcc k exec -it nginx -- curl 10.105.243.33:8080
Hello, world!
Version: 1.0.0
Hostname: web-746c8679d4-ptmgh
❯
Lets create a second deployment under namespace ingress-nginx.
❯ gcc kubectl create deployment web2 --image=gcr.io/google-samples/hello-app:2.0 -n ingress-nginx
deployment.apps/web2 created
❯
❯ gcc kubectl expose deployment web2 --port=8080 --type=NodePort -n ingress-nginx
service/web2 exposed
❯
❯
❯ gcc k get deployment web2 -n ingress-nginx
NAME READY UP-TO-DATE AVAILABLE AGE
web2 1/1 1 1 56s
❯ gcc k get svc web2 -n ingress-nginx
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
web2 NodePort 10.99.79.19 <none> 8080:31695/TCP 65s
❯ gcc k get ep web2 -n ingress-nginx
NAME ENDPOINTS AGE
web2 192.168.2.13:8080 73s
Verify svc web2.
❯ gcc k exec -it nginx -- curl 10.99.79.19:8080
Hello, world!
Version: 2.0.0
Hostname: web2-5858b4c7c5-tmn8x
Service web and web2 are accessible within the TKC. We've already verified it from the nginx pod that runs within the same TKC.
Now, we will create an ingress resource under namespace ingress-nginx.
❯ cat ing-01.yaml
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: hello-world-ing
annotations:
kubernetes.io/ingress.class: "nginx"
spec:
rules:
- host: hello-world.info
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: web
port:
number: 8080
- path: /v2
pathType: Prefix
backend:
service:
name: web2
port:
number: 8080
❯ gcc k create -f ing-01.yaml -n ingress-nginx
ingress.networking.k8s.io/hello-world-ing created
❯
❯ gcc k get ing -n ingress-nginx
NAME CLASS HOSTS ADDRESS PORTS AGE
hello-world-ing <none> hello-world.info 80 55s
❯ gcc k get ing -n ingress-nginx
NAME CLASS HOSTS ADDRESS PORTS AGE
hello-world-ing <none> hello-world.info 10.186.124.41 80 56s
I've created a entry in /etc/hosts file in my laptop so that hello-world.info resolves to 10.186.124.41 which is the external IP of service/ingress-nginx-controller.
❯ cat /etc/hosts
##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
127.0.0.1 localhost
255.255.255.255 broadcasthost
::1 localhost
# Added by Docker Desktop
# To allow the same kube context to work on the host and the container:
127.0.0.1 kubernetes.docker.internal
10.186.124.41 hello-world.info
# End of section
Now from my laptop when I curl to hello-world.info, the request will be served by web svc, and when I curl to hello-world.info/v2, it will be served by web2 svc.
❯
❯ curl hello-world.info
Hello, world!
Version: 1.0.0
Hostname: web-746c8679d4-ptmgh
❯
❯ curl hello-world.info/v2
Hello, world!
Version: 2.0.0
Hostname: web2-5858b4c7c5-tmn8x
❯
Hope it was useful. Cheers!
References:
https://kubernetes.io/docs/tasks/access-application-cluster/ingress-minikube/
https://kubernetes.github.io/ingress-nginx/user-guide/basic-usage/
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