03-cicd-pipelines.slide

Production-ready microservices with Go and Kubernetes
#ContainerDays
09:00 18 Jun 2018

Elena Grahovac
elena@grahovac.me
@webdeva


* Local cinfiguration and tools

.link https://ui.k8s.community

* Hello, Kubernetes!

Deploy and expose deployment of your first service:

    USER=your_github_user
    kubectl run hello-app --image=gcr.io/google-samples/hello-app:1.0 --port=8080 -n ${USER}
    kubectl expose deployment hello-app -n ${USER}

* Hello, Kubernetes!

Add ingress (create hello-ingress.yaml file, don'f forget to change namespace):

    apiVersion: extensions/v1beta1
    kind: Ingress
    metadata:
    name: hello-ingress
    namespace: rumyantseva
    annotations:
        kubernetes.io/ingress.class: nginx
        nginx.ingress.kubernetes.io/ssl-redirect: "false"
    spec:
    tls:
    - secretName: tls-secret
        hosts:
        - services.k8s.community
    rules:
    - http:
        paths:
        - path: /rumyantseva/hello
            backend:
            serviceName: hello-app
            servicePort: 8080
        host: services.k8s.community

* Hello, Kubernetes!

Apply ingress configuration:

    kubectl apply -f hello-ingress.yaml

Check this out:

    kubectl get services -n ${USER}

    curl -i https://services.k8s.community/${USER}/hello

* Trying CI/CD

- Install GitHub app to allow CI/CD listen to events:
.link https://github.com/apps/k8s
- Create a brunch release/a.b.c (where a.b.c is the same as RELEASE from the Makefile) 
- Push something
- CI and CD processes should be started
- If everything is ok your service will be available at
 https://services.k8s.community/<username>/<app name>

* Additional tasks

- When your service is released, you can try to play with some other useful kubectl commands.
For example, try to find how to get logs of your application. Try to delete pods and see what happens.

- Try to change something with your current service or release another one.

* Examples

.link https://github.com/kubernetes/charts
.link https://github.com/k8s-community

* Run Kubernetes locally

- install kubectl:
.link https://kubernetes.io/docs/tasks/tools/install-kubectl/
- install minikube:
.link https://kubernetes.io/docs/tasks/tools/install-minikube/
- run: `minikube` `start`
- initialize ingress: `minikube` `addons` `enable` `ingress`
- set context: `kubectl` `config` `use-context` `minikube`
- check: `kubectl` `config` `current-context`
- try dashboard: `minikube` `dashboard`

* Install helm

- install helm:
.link https://docs.helm.sh/using_helm/#installing-the-helm-client
- run: `helm` `init`
- check: `helm` `search`

* Local configuration

- Add additional chart configuration (values file) to be able to release your service locally

* Questions & additional tasks