SAP Community Code Challenge - Let's set sail for Cloud Native Island!

[KRiedelsheimer]

We have a new code challenge for you as part of the Community Spotlight for the month of July. This time it's about setting sail for Cloud Native Island, where you will explore the treasures of Kubernetes, Containerization and the SAP BTP, Kyma runtime.

This thread is the place to share your experience with the challenge and your progress for the challenge. Feel free to ask any questions (technical or non-technical) and leave your comments.

We are very much looking forward to your ideas and contributions! 😃⛵

[noravonthenen]

🙂

[jacobahtan]

Week 2
https://ui5-walkthrough.c-5a642e4.kyma.ondemand.com/

Deployed the famous SAPUI5 Walkthrough to Kyma. 😉

deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: ui5-walkthrough
  labels:
    app: ui5-walkthrough
spec:
  replicas: 1
  selector:
    matchLabels:
      app: ui5-walkthrough
  template:
    metadata:
      labels:
        app: ui5-walkthrough
    spec:
      containers:
      - name: ui5-walkthrough
        image: docker.io/jacobtan89/ui5-walkthrough:latest
        imagePullPolicy: Always
        ports:
        - containerPort: 8080
        resources:
            limits:
              ephemeral-storage: 256M
              memory: 256M
              cpu: 100m
            requests:
              cpu: 100m
              ephemeral-storage: 256M
              memory: 256M
      imagePullSecrets:
      - name: regcred
status: {}
      
---
apiVersion: v1
kind: Service
metadata:
  name: ui5-walkthrough
spec:
  selector:
    app: ui5-walkthrough
  ports:
  - port: 8080
    targetPort: 8080
    protocol: TCP

---

apiVersion: gateway.kyma-project.io/v1alpha1
kind: APIRule
metadata:
  name: ui5-walkthrough
spec:
  gateway: kyma-gateway.kyma-system.svc.cluster.local
  service:
    name: ui5-walkthrough
    port: 8080
    host: ui5-walkthrough
  rules:
    - path: /.*
      methods: ["GET"]
      accessStrategies:
        - handler: noop
          config: {}

[former_member11443]

Week 2

based on https://cap.cloud.sap/docs/guides/deployment/deploy-to-kyma#build-cap-nodejs-image

global:

  domain: adeb271.kyma.ondemand.com

  imagePullSecret:

    name: regcred

srv:

  bindings: {}

  image:

    repository: ghcr.io/a-kuller/challenge-srv

    tag: latest

  resources:

    limits:

      cpu: 100m

      ephemeral-storage: 1G

      memory: 500M

    requests:

      cpu: 100m

      ephemeral-storage: 1G

      memory: 500M

  health_check:

    liveness:

      path: /

    readiness:

      path: /

[MioYasutake]

I'm on week challenge and have an issue. I am new to Kyma, so I just started with a similar setting with week1.

My GitHub repository is below and "myservice" is the folder that contains my week2 app.

https://github.com/miyasuta/sap-community-code-challenge-cloud-native/tree/week2

Deployment to Kyma was successful as shown below.

However, when I open the API url, I see the following error.

https://my-service.a2985eb.kyma.shoot.live.k8s-hana.ondemand.com/

upstream connect error or disconnect/reset before headers. reset reason: connection failure, transport failure reason: delayed connect error: 111

In cloud foundry I would see application logs with `cf logs <appname>`. Where should I start looking to troubleshoot with Kyma? 

[MioYasutake]

The issue has been resolved. There seems to be a problem with the port mapping.

My week2 submission

https://my-service.a2985eb.kyma.shoot.live.k8s-hana.ondemand.com/hello/world

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-service
  labels:
    app: my-service
spec:
  replicas: 1
  selector:
    matchLabels:
      app: my-service
  template:
    metadata:
      labels:
        app: my-service
    spec:
      containers:
      - name: my-service
        image: ghcr.io/miyasuta/sap-community-code-challenge-cloud-native/my-service:latest
        # image: miyasuta/my-service:latest
        imagePullPolicy: Always
        ports:
        - containerPort: 8080
        resources:
            limits:
              ephemeral-storage: 256M
              memory: 256M
              cpu: 100m
            requests:
              cpu: 100m
              ephemeral-storage: 256M
              memory: 256M
      imagePullSecrets:
      - name: regcred
status: {}
      
---
apiVersion: v1
kind: Service
metadata:
  name: my-service
spec:
  selector:
    app: my-service
  ports:
  - port: 8081
    targetPort: 8080
    protocol: TCP

---

apiVersion: gateway.kyma-project.io/v1alpha1
kind: APIRule
metadata:
  name: my-service
spec:
  gateway: kyma-gateway.kyma-system.svc.cluster.local
  service:
    name: my-service
    port: 8081
    host: my-service
  rules:
    - path: /.*
      methods: ["GET"]
      accessStrategies:
        - handler: noop
          config: {}

[KRiedelsheimer]

Hi @MioYasutake ,

I am sorry that I didn't reply, I was out sick. I am glad you could solve the issue!

[SUNIL_JOHN]

Week:2

https://hello-world.c-415359f.kyma.ondemand.com/say/hello(to='there')

apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-world 
  labels:
    app: hello-world 
spec:
  replicas: 1
  selector:
    matchLabels:
      app: hello-world 
  template:
    metadata:
      labels: # labels to select/identify the deployment
        app: hello-world  
    spec:     # pod spec                  
      containers: 
      - image: jsunil0101/hello-world:latest # image we pushed
        name: hello-world  
        imagePullPolicy: Always
        ports:
        - name: http
          containerPort: 4004
        resources:
            limits:
              ephemeral-storage: 256M
              memory: 256M
              cpu: 100m
            requests:
              cpu: 100m
              ephemeral-storage: 256M
              memory: 256M
      imagePullSecrets:
      - name: regcred
status: {}

---
apiVersion: v1
kind: Service
metadata:
  name: hello-world 
  labels:
    app: hello-world
spec:
  ports:
  - name: http
    port: 4004
    targetPort: 4004
  selector:
    app: hello-world

---

apiVersion: gateway.kyma-project.io/v1alpha1
kind: APIRule
metadata:
  name: hello-world
spec:
  gateway: kyma-gateway.kyma-system.svc.cluster.local
  service:
    name: hello-world
    port: 4004
    host: hello-world
  rules:
    - path: /.*
      methods: ["GET"]
      accessStrategies:
        - handler: noop
          config: {}

[PunithKumar]

Week2 Challenge Submission:

https://hello-world-week2.a8a8425.kyma.ondemand.com/greeting/Punith

Deployment.yaml file

apiVersion: apps/v1
kind: Deployment
metadata:
  name: hello-world-week2
  labels:
    app: hello-world-week2
spec:
  replicas: 1
  selector:
    matchLabels:
      app: hello-world-week2
  template:
    metadata:
      labels:
        app: hello-world-week2
    spec:
      containers:
      - name: hello-world-week2
        image: ghcr.io/punithmsit/hello-world:latest
        imagePullPolicy: Always
        ports:
        - name: http
          containerPort: 5000
        resources:
            limits:
              ephemeral-storage: 256M
              memory: 256M
              cpu: 100m
            requests:
              cpu: 100m
              ephemeral-storage: 256M
              memory: 256M
      imagePullSecrets:
      - name: hellocred
status: {}
      
---
apiVersion: v1
kind: Service
metadata:
  name: hello-world-week2
spec:
  selector:
    app: hello-world-week2
  ports:
  - name: http
    port: 8080
    targetPort: 5000
    protocol: TCP

---

apiVersion: gateway.kyma-project.io/v1alpha1
kind: APIRule
metadata:
  name: hello-world-week2
spec:
  gateway: kyma-gateway.kyma-system.svc.cluster.local
  service:
    name: hello-world-week2
    port: 8080
    host: hello-world-week2
  rules:
    - path: /.*
      methods: ["GET"]
      accessStrategies:
        - handler: noop
          config: {}

[former_member11683]

Week 2:

deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: statichtml
  labels:
    app: statichtml
spec:
  replicas: 1
  selector:
    matchLabels:
      app: statichtml
  template:
    metadata:
      labels:
        app: statichtml
    spec:
      containers:
      - name: statichtml
        image: kanagasabapathib021/statichtml:latest
        imagePullPolicy: Always
        ports:
        - containerPort: 80
          name: http
status: {}
      
---
apiVersion: v1
kind: Service
metadata:
  name: statichtml
spec:
  selector:
    app: statichtml
  ports:
  - port: 80
    name: http

---

apiVersion: gateway.kyma-project.io/v1alpha1
kind: APIRule
metadata:
  name: statichtml
spec:
  gateway: kyma-gateway.kyma-system.svc.cluster.local
  service:
    name: statichtml
    port: 80
    host: statichtml
  rules:
    - path: /.*
      methods: ["GET"]
      accessStrategies:
        - handler: noop
          config: {}

[YoshiakiToma]

Hi!

Week 2, I made a development CAP in Kyma:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: orders
  labels:
    app: orders
spec:
  replicas: 1
  selector:
    matchLabels:
      app: orders
  template:
    metadata:
      labels:
        app: orders
    spec:
      containers:
      - name: orders
        image: yoshiakitoma/cpapp:latest
        imagePullPolicy: Always
        ports:
        - containerPort: 4004
        resources:
            limits:
              ephemeral-storage: 256M
              memory: 256M
              cpu: 100m
            requests:
              cpu: 100m
              ephemeral-storage: 256M
              memory: 256M
      imagePullSecrets:
      - name: regcred
status: {}
      
---
apiVersion: v1
kind: Service
metadata:
  name: orders
spec:
  selector:
    app: orders
  ports:
  - port: 8080
    targetPort: 4004
    protocol: TCP

---

apiVersion: gateway.kyma-project.io/v1alpha1
kind: APIRule
metadata:
  name: orders
spec:
  gateway: kyma-gateway.kyma-system.svc.cluster.local
  service:
    name: orders
    port: 8080
    host: orders
  rules:
    - path: /.*
      methods: ["GET"]
      accessStrategies:
        - handler: noop
          config: {}

[LucasPires230]

Hello!

Here is my week 2 challenge. I made a CAP in Kyma

https://orders.c-410cfea.kyma.ondemand.com/

apiVersion: apps/v1
kind: Deployment
metadata:
  name: orders
  labels:
    app: orders
spec:
  replicas: 1
  selector:
    matchLabels:
      app: orders
  template:
    metadata:
      labels:
        app: orders
    spec:
      containers:
      - name: orders
        image: phantom230/ordersapp:latest
        imagePullPolicy: Always
        ports:
        - containerPort: 4004
        resources:
            limits:
              ephemeral-storage: 256M
              memory: 256M
              cpu: 100m
            requests:
              cpu: 100m
              ephemeral-storage: 256M
              memory: 256M
      imagePullSecrets:
      - name: regcred
status: {}
      
---
apiVersion: v1
kind: Service
metadata:
  name: orders
spec:
  selector:
    app: orders
  ports:
  - port: 8080
    targetPort: 4004
    protocol: TCP

---

apiVersion: gateway.kyma-project.io/v1alpha1
kind: APIRule
metadata:
  name: orders
spec:
  gateway: kyma-gateway.kyma-system.svc.cluster.local
  service:
    name: orders
    port: 8080
    host: orders
  rules:
    - path: /.*
      methods: ["GET"]
      accessStrategies:
        - handler: noop
          config: {}

[Tsuyoushi]

Hi!

I finished week 2 using CAP as service for deployment.

https://agendacap-sample.ef5bceb.kyma.ondemand.com/ - URL Service
https://github.com/Tsuyoushi/agendacap-sample-kyma.git - Git Repository

[mauriciolauffer]

Week 2

https://kyma-nodejs-hello.c-422ff4c.kyma.ondemand.com/

[ec1]

I'm late to join the fun but this is my week 1 submission

https://hello-community.c9122d8.kyma.ondemand.com/greeting/Stev

[AthiraLekshmi]

Hello

Please find Week 1 submission here.

https://hello-community.c-08e0512.kyma.ondemand.com/greeting/Athira

[AthiraLekshmi]

Hello

Please find week2 submission here.

https://statichtml.c-08e0512.kyma.ondemand.com/

[Swadhin]

A bit late

https://hello-community.c-17a61a5.kyma.ondemand.com/greeting/swadhinbharat

[former_member11443]

Week 3

Hello all,

I have been looking for the specified buttons for half an hour. Environment: BTP Free Tier with Default idendity provider

Where can I find the item "Go to Applications & Resources Applications and select Create."? (src 1a https://help.sap.com/docs/BTP/65de2977205c403bbc107264b8eccf4b/44bb2d3596554bf4b94ea344e40937dd.html...)

I don't necessarily want to create my own idendity provider.

Thanks a lot

[SUNIL_JOHN]

Week:3 

Seems the Cloud Identity service may not available for use in trial. So will have to skip this week challenge , or wait for an alternate approach from community.

Initial Setup | SAP Help Portal

https://iamtenants.accounts.cloud.sap/ will list your the IAS/IPS.

[MioYasutake]

Week3

https://my-service.a2985eb.kyma.shoot.live.k8s-hana.ondemand.com

I don't have a Free Tier account nor IAS tenant, so I used an XSUAA service instance in my BTP CF environment. Not sure if this is the right thing to do, but it seems to be working.

I refereed to the following blog post.

https://blogs.sap.com/2022/03/03/security-in-kyma-environment-whats-new-for-sap-btp-kyma-runtime/

My access strategy is configured as below.

      accessStrategies:
        - handler: jwt
          config:
            jwks_urls:
            - https://9e9ab65etrial.authentication.eu10.hana.ondemand.com/token_keys

I have tested with Postman. If you provide authorization header, the API gets authenticated and you'll see the response.

[SUNIL_JOHN]

Week 3 . Securing the endpoint , Implemented it using OAuth2.

Updated the API Access Strategy to OAuth2.

OAuth Token endpoint : https://oauth2.c-415359f.kyma.ondemand.com/oauth2/token

You should get a 401 here ->  https://hello-world.c-415359f.kyma.ondemand.com/say/hello(to='OAuth')

[AthiraLekshmi]

Hello

Please find week 3 submission below.

Used OAuth2 access strategy.

Unauthorized endpoint: https://oauthcheck.c-08e0512.kyma.ondemand.com/

GET call with OAuth token: 

[noravonthenen]

Thanks Kevin! I've learned so much already and had a lot of fun!

Submission week 2:

apiVersion: v1
kind: Service
metadata:
  name: code-challenge-helloworld
  labels:
    app: code-challenge-helloworld
spec:
  ports:
  - name: http
    port: 3333
  selector:
    app: code-challenge-helloworld

---

apiVersion: apps/v1
kind: Deployment
metadata:
  name: hcode-challenge-elloworld
spec:
  selector:
    matchLabels:
      app: code-challenge-helloworld
  replicas: 1
  template:
    metadata:
      labels:
        app: code-challenge-helloworld
    spec:
      containers:
        - image: noravth/code-challenge-hello-world-python-image
          name: code-challenge-helloworld
          ports:
          - containerPort: 3333

[sainithesh21]

Here is my Week 2 Submission.

https://py-flask-kubernetes.c-5ff4ab7.kyma.shoot.live.k8s-hana.ondemand.com/getTime 

deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: py-flask-kubernetes
  labels:
    app: py-flask-kubernetes
spec:
  selector:
    matchLabels:
      app: py-flask-kubernetes
  replicas: 1
  template:
    metadata:
      labels:
        app: py-flask-kubernetes
    spec:
      containers:
      - name: py-flask-kubernetes
        image: ghcr.io/sainithesh/py-flask-kubernetes:latest 
        imagePullPolicy: Always
        ports:
        - containerPort: 8080
        resources:
            limits:
              ephemeral-storage: 256M
              memory: 256M
              cpu: 100m
            requests:
              ephemeral-storage: 256M
              memory: 256M
              cpu: 100m
      imagePullSecrets:
      - name: py-regcred
status: {}
        
---
apiVersion: v1
kind: Service
metadata:
  name: py-flask-kubernetes
spec:
  selector:
    app: py-flask-kubernetes
  ports:
  - protocol: "TCP"
    port: 8081
    targetPort: 8080


---
apiVersion: gateway.kyma-project.io/v1alpha1
kind: APIRule
metadata:
  name: py-flask-kubernetes
spec:
  gateway: kyma-gateway.kyma-system.svc.cluster.local
  service:
    name: py-flask-kubernetes
    port: 8081
    host: py-flask-kubernetes
  rules:
    - path: /.*
      methods: ["GET"]
      accessStrategies:
        - handler: noop
          config: {}

Regards,

Sai Nithesh

[kevin_hu]

Week 3

updated deployment.yaml, ideally should be in seperate files, doesn't it.

Create xsuaa service
Create xsuaa service binding
Update API rule

################### UPDATED API RULE ###################
---
apiVersion: gateway.kyma-project.io/v1alpha1
kind: APIRule
metadata:
  name: go-hello
spec:
  gateway: kyma-gateway.kyma-system.svc.cluster.local
  service:
    name: go-hello
    port: 8080
    host: go-hello
  rules:
    - accessStrategies:
        - config:
            jwks_urls:
              - >-
                https://<my-sub-domain>.authentication.eu10.hana.ondemand.com/token_keys
          handler: jwt
      methods:
        - GET
      path: /.*

################### XSUAA ###################
---
apiVersion: services.cloud.sap.com/v1
kind: ServiceInstance
metadata:
  name: xsuaa-oidc
spec:
  serviceOfferingName: xsuaa
  servicePlanName: application

################### XSUAA SERVICE BINDING ###################
---
apiVersion: services.cloud.sap.com/v1
kind: ServiceBinding
metadata:
  name: xsuaa-service-binding
spec:
  serviceInstanceName: xsuaa-oidc
  secretName: xsuaa-service-binding

P,S. Interestingly to see the recent Kyma upgrade made a lot of tutorials a bit out of date. 😀

[kevin_hu]

For Week 3, in case of using IAS as the openid connect provider, the jwks_urls looks like this
https://<your-ias-tenant>.accounts.ondemand.com/oauth2/certs

[former_member11342]

Hi!!

Here is my submission for week 3 --> https://rick-and-morty.e51816a.kyma.ondemand.com

¡Happy Coding!

[former_member11683]

Week 3:

https://hello-community.c-994d9e7.kyma.ondemand.com/

Thanks

[Mattias]

Week 3 submission:

https://hello-world.c-65c082c.kyma.ondemand.com/

[Naguco]

week 1 solution

[Naguco]

Week 2 challenge

apiVersion: apps/v1
kind: Deployment
metadata:
  name: sap-own-service-example
  labels:
    app: sap-own-service-example
spec:
  replicas: 1
  selector:
    matchLabels:
      app: sap-own-service-example
  template:
    metadata:
      labels:
        app: sap-own-service-example
    spec:
      containers:
      - name: sap-own-service-example
        image: docker.io/naguco/sap-own-service-example:latest
        imagePullPolicy: Always
        ports:
        - containerPort: 8080
        resources:
            limits:
              ephemeral-storage: 256M
              memory: 256M
              cpu: 100m
            requests:
              cpu: 100m
              ephemeral-storage: 256M
              memory: 256M
      imagePullSecrets:
      - name: regcred
status: {}
      
---
apiVersion: v1
kind: Service
metadata:
  name: sap-own-service-example
spec:
  selector:
    app: sap-own-service-example
  ports:
  - port: 8080
    targetPort: 8080
    protocol: TCP

---

apiVersion: gateway.kyma-project.io/v1alpha1
kind: APIRule
metadata:
  name: sap-own-service-example
spec:
  gateway: kyma-gateway.kyma-system.svc.cluster.local
  service:
    name: sap-own-service-example
    port: 8080
    host: sap-own-service-example
  rules:
    - path: /.*
      methods: ["GET"]
      accessStrategies:
        - handler: noop
          config: {}

[Swadhin]

Week 4:

https://randomword.c-17a61a5.kyma.ondemand.com/

[former_member11342]

Hi!!

Here is my submission for week 4 --> https://rick-and-morty.e51816a.kyma.ondemand.com/character/1

The command I used is: "kubectl  -n dev autoscale deployment <name> --cpu-percent=10--min=1 --max=10" --> doc: link

  

¡Happy Coding!

[Mattias]

Week 4 submission, lets see how the UI5 walkthrough stands up to your load test

https://week4.c-65c082c.kyma.ondemand.com/

[kadir_ozgur]

Here is my 2. week submission, a simple user API (only GET Method for now) with github link for the deployment files.

https://github.com/ozgurkadir/go-kyma-user-api.git

Service URL : https://ee.d716b36.kyma.ondemand.com/users

[sainithesh21]

Hi,

My Week 3 Submission

https://py-flask-kubernetes-sec.c-5ff4ab7.kyma.shoot.live.k8s-hana.ondemand.com/ 

Regards,

Sai Nithesh

[sainithesh21]

Hi..,

Here is my Week 4 submission.

URL : https://py-flask-kubernetes.c-5ff4ab7.kyma.shoot.live.k8s-hana.ondemand.com/getTime

Regards,

Sai Nithesh

[ajmaradiaga]

My week 1 submission:

URL: https://ccc-cloud-native-service.c-24e06bb.kyma.ondemand.com/greeting/ajmaradiaga

[ajmaradiaga]

My week 2 submission:

Deployment file:

apiVersion: apps/v1
kind: Deployment
metadata:
  namespace: default
  name: check-invoice
  annotations:
    sidecar.istio.io/inject: "true"
spec:
  replicas: 1
  selector:
    matchLabels:
      app: check-invoice
  template:
    metadata:
      labels:
        app: check-invoice
        version: v1
    spec:
      containers:
        - name: check-invoice
          image: registry.mycompany.com/check-invoice:0.3
          ports:
            - containerPort: 8080
      imagePullSecrets:
        - name: docker-registry-secret

Calling service

[ajmaradiaga]

My week 3 submission:

URL: https://mlb-roster.c-1e90315.kyma.ondemand.com

401 error screenshot: