Ingress on minikube
First off, remove our minikube:
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minikube delete --profile minikube
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And install minikube:
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# https://minikube.sigs.k8s.io/docs/faq/#how-can-i-access-a-minikube-cluster-from-a-remote-network
minikube start --nodes 3 --profile=minikube --driver=docker --listen-address=0.0.0.0
minikube addons enable metrics-server
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Get container id of minikube and check ports (--listen-address):
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docker ps --filter name=minikube -q
9bafec0763c9
6bec57ee7992
6090eadfd27f
docker port 9bafec0763c9
docker port 6bec57ee7992
docker port 6090eadfd27f
22/tcp -> 0.0.0.0:32849
2376/tcp -> 0.0.0.0:32848
5000/tcp -> 0.0.0.0:32847
8443/tcp -> 0.0.0.0:32846
32443/tcp -> 0.0.0.0:32845
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Enable minikube in our installation:
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minikube addons enable ingress
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Check ingress pods:
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kubectl get pods -n ingress-nginx
NAME READY STATUS RESTARTS AGE
ingress-nginx-admission-create-w7vn8 0/1 Completed 0 21s
ingress-nginx-admission-patch-4chvd 0/1 Completed 0 21s
ingress-nginx-controller-77669ff58-x9vkk 0/1 Running 0 21s
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Realize this schema:
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User --> Path --v1-> app v1.0
\-v2-> app v2.0
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Create 2 deployments:
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kubectl create deployment appv1 --image=gcr.io/google-samples/hello-app:1.0 --dry-run=client -o yaml | kubectl apply -f-
kubectl create deployment appv2 --image=gcr.io/google-samples/hello-app:2.0 --dry-run=client -o yaml | kubectl apply -f-
kubectl scale deployment appv1 --replicas 2
kubectl scale deployment appv2 --replicas 4
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Create 2 services:
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# --port= is a port of our service,
# --target-port= - where our app is running inside the pod
kubectl expose deployment appv1 --name=appv1-svc --type=NodePort --port=8080 --dry-run=client -o yaml | kubectl apply -f-
kubectl expose deployment appv2 --name=appv2-svc --type=ClusterIP --port=9090 --target-port=8080 --dry-run=client -o yaml | kubectl apply -f-
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Check:
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kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
appv1-7f688c5c7c-k2478 1/1 Running 0 48s 10.244.2.6 minikube-m03 <none> <none>
appv1-7f688c5c7c-sj24n 1/1 Running 0 23m 10.244.1.3 minikube-m02 <none> <none>
appv2-9446dbfc7-2p2sj 1/1 Running 0 17m 10.244.0.6 minikube <none> <none>
appv2-9446dbfc7-92z6f 1/1 Running 0 23m 10.244.2.4 minikube-m03 <none> <none>
appv2-9446dbfc7-c9hsz 1/1 Running 0 17m 10.244.1.4 minikube-m02 <none> <none>
appv2-9446dbfc7-kq8sh 1/1 Running 0 17m 10.244.2.5 minikube-m03 <none> <none>
kubectl get services -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
appv1 NodePort 10.108.172.125 <none> 8080:32516/TCP 5m27s app=appv1
appv2 ClusterIP 10.103.61.88 <none> 9090/TCP 47s app=appv2
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It’s not recommended to use Node port for productuon environments. (Need to find a proof!!!)
Check with container:
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# check pods
kubectl --namespace default run alpine --image alpine:latest \
--rm --stdin --tty \
-- sh -c "apk add curl; curl -D - http://10.244.0.6:8080; echo; curl -D - http://10.244.1.3:8080"
# check services
kubectl run alpine --image alpine --tty --stdin --rm -- sh -c "apk add curl; sh"
curl http://10.108.172.125:8080
Hello, world!
Version: 1.0.0
Hostname: appv1-7f688c5c7c-sj24n
curl http://10.103.61.88:9090
Hello, world!
Version: 2.0.0
Hostname: appv2-9446dbfc7-92z6f
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Now, let’s create ingress:
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kubectl create ingress ingress-nginx --rule=check.my.awesome.ingress.com/v1=appv1-svc:8080 --rule=check.my.awesome.ingress.com/v2=appv2-svc:9090 --annotation='nginx.ingress.kubernetes.io/rewrite-target=/$1' --dry-run=client -o yaml | kubectl apply -f-
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Get cluster ip, and put it into /etc/hosts:
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minikube ip
192.168.58.2
cat /etc/hosts | grep "192.168.58.2"
192.168.58.2 check.my.awesome.ingress.com
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Let’s ensure that our ingress is working:
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curl -D - "http://check.my.awesome.ingress.com/v1"
HTTP/1.1 200 OK
Date: Fri, 24 Feb 2023 11:53:32 GMT
Content-Type: text/plain; charset=utf-8
Content-Length: 62
Connection: keep-alive
Hello, world!
Version: 1.0.0
Hostname: appv1-7f688c5c7c-k2478
curl -D - "http://check.my.awesome.ingress.com/v2"
HTTP/1.1 200 OK
Date: Fri, 24 Feb 2023 11:53:35 GMT
Content-Type: text/plain; charset=utf-8
Content-Length: 61
Connection: keep-alive
Hello, world!
Version: 2.0.0
Hostname: appv2-9446dbfc7-kq8sh
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