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Merge pull request #9 from kolayne-IU-assignments/lab9
Lab9
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‎k8s/README.md

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# Kubernetes
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## Manual setup
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```
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$ kubectl get pods,svc
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NAME READY STATUS RESTARTS AGE
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pod/web-app-py-64bf47b878-9gb7c 1/1 Running 0 62s
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NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
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service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 22m
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service/web-app-py LoadBalancer 10.109.167.161 <pending> 80:30520/TCP 39s
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```
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## Manifest-based setup
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```
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$ kubectl get pods,svc
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NAME READY STATUS RESTARTS AGE
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pod/web-app-py-54bf57f5d4-g8ktf 1/1 Running 0 3m23s
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pod/web-app-py-54bf57f5d4-k8ngh 1/1 Running 0 3m23s
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pod/web-app-py-54bf57f5d4-p4d6p 1/1 Running 0 3m23s
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NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
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service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 4m43s
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service/web-app-py LoadBalancer 10.105.228.85 <pending> 5000:31951/TCP 3m23s
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$ minikube service --all
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|-----------|------------|-------------|--------------|
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| NAMESPACE | NAME | TARGET PORT | URL |
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|-----------|------------|-------------|--------------|
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| default | kubernetes | | No node port |
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|-----------|------------|-------------|--------------|
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😿 service default/kubernetes has no node port
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|-----------|------------|-------------|---------------------------|
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| NAMESPACE | NAME | TARGET PORT | URL |
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|-----------|------------|-------------|---------------------------|
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| default | web-app-py | 5000 | http://192.168.49.2:31951 |
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|-----------|------------|-------------|---------------------------|
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🎉 Opening service default/web-app-py in default browser...
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Opening in existing browser session.
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$
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```
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## Ingress
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```
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$ curl --resolve "kolay.ne:80:$( minikube ip )" --verbose http://kolay.ne/ ; echo
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* Added kolay.ne:80:192.168.49.2 to DNS cache
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* Hostname kolay.ne was found in DNS cache
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* Trying 192.168.49.2:80...
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* Connected to kolay.ne (192.168.49.2) port 80
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> GET / HTTP/1.1
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> Host: kolay.ne
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> User-Agent: curl/8.7.1
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> Accept: */*
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>
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* Request completely sent off
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< HTTP/1.1 404 Not Found
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< Date: Fri, 29 Mar 2024 13:58:46 GMT
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< Content-Type: text/html
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< Content-Length: 146
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< Connection: keep-alive
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<
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<html>
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<head><title>404 Not Found</title></head>
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<body>
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<center><h1>404 Not Found</h1></center>
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<hr><center>nginx</center>
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</body>
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</html>
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* Connection #0 to host kolay.ne left intact
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$ curl --resolve "kolay.ne:80:$( minikube ip )" --verbose http://kolay.ne/time ; echo
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* Added kolay.ne:80:192.168.49.2 to DNS cache
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* Hostname kolay.ne was found in DNS cache
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* Trying 192.168.49.2:80...
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* Connected to kolay.ne (192.168.49.2) port 80
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> GET /time HTTP/1.1
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> Host: kolay.ne
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> User-Agent: curl/8.7.1
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> Accept: */*
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>
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* Request completely sent off
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< HTTP/1.1 200 OK
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< Date: Fri, 29 Mar 2024 13:58:51 GMT
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< Content-Type: text/html; charset=utf-8
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< Content-Length: 60
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< Connection: keep-alive
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<
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* Connection #0 to host kolay.ne left intact
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In MSK it's 16:57:49. Have you brushed your teeth today yet?
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$ curl --resolve "kolay.ne:80:$( minikube ip )" --verbose http://kolay.ne/cats ; echo
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* Added kolay.ne:80:192.168.49.2 to DNS cache
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* Hostname kolay.ne was found in DNS cache
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* Trying 192.168.49.2:80...
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* Connected to kolay.ne (192.168.49.2) port 80
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> GET /cats HTTP/1.1
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> Host: kolay.ne
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> User-Agent: curl/8.7.1
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> Accept: */*
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>
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* Request completely sent off
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< HTTP/1.1 200 OK
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< Date: Fri, 29 Mar 2024 13:58:56 GMT
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< Content-Type: text/plain; charset=utf-8
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< Content-Length: 162
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< Connection: keep-alive
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<
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* Connection #0 to host kolay.ne left intact
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There is a species of cat smaller than the average housecat. It is native to Africa and it is the Black-footed cat (Felis nigripes). Its top weight is 5.5 pounds.
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$
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```
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Note: 5.5 pounds is about 2.49 kilograms

‎k8s/ingress.yaml

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apiVersion: networking.k8s.io/v1
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kind: Ingress
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metadata:
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name: combined-web-app
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annotations:
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nginx.ingress.kubernetes.io/rewrite-target: /
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spec:
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rules:
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- host: kolay.ne
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http:
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paths:
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- path: /time
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pathType: Prefix
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backend:
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service:
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name: web-app-py
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port: {number: 5000}
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- path: /cats
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pathType: Prefix
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backend:
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service:
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name: web-app-go
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port: {number: 5050}

‎k8s/web-app-go-deployment.yaml

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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: web-app-go
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spec:
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replicas: 3
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selector:
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matchLabels:
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app: web-app-go
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template:
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metadata:
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labels:
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app: web-app-go
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spec:
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containers:
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- name: web-app-go
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image: kolay0ne/app_go:lab8
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ports:
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- containerPort: 5000
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name: web-ui
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strategy:
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type: RollingUpdate
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rollingUpdate:
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maxUnavailable: 1

‎k8s/web-app-go-service.yaml

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apiVersion: v1
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kind: Service
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metadata:
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name: web-app-go
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spec:
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selector:
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app: web-app-go
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ports:
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- protocol: TCP
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port: 5050
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targetPort: web-ui
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type: LoadBalancer

‎k8s/web-app-py-deployment.yaml

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apiVersion: apps/v1
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kind: Deployment
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metadata:
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name: web-app-py
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spec:
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replicas: 3
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selector:
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matchLabels:
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app: web-app-py
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template:
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metadata:
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labels:
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app: web-app-py
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spec:
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containers:
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- name: web-app-py
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image: kolay0ne/app_py:lab8
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ports:
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- containerPort: 5000
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name: web-ui
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strategy:
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type: RollingUpdate
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rollingUpdate:
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maxUnavailable: 1

‎k8s/web-app-py-service.yaml

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apiVersion: v1
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kind: Service
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metadata:
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name: web-app-py
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spec:
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selector:
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app: web-app-py
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ports:
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- protocol: TCP
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port: 5000
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targetPort: web-ui
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type: LoadBalancer

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