Kubernetes 102 - O Caminho das pedras - Parte 2

Services, o loadbalancer do kubernetes!

Transcript

1. @juniorjbn joao@getupcloud.com KUBERNETES - 102 Kubernetes it's not a Big Deal. It's like the old infrastructure but without the old :D
2. João Brito @juniorjbn joao@getupcloud.com Advocate/Sysadmin Getup Cloud
3. SVC Overview • Discovery • Balancing Remember • Readiness • Liveness • ExecAction • TCPSocketAction • HTTPGetAction SVC
4. Service • Define ◦ Label Selector ◦ REST object kind: Service apiVersion: v1 metadata: name: my-service spec: selector: app: MyApp ports: - protocol: TCP port: 80 targetPort: 9376 $ kubectl -n demo run hello-cloud --image juniorjbn/php-demo:1 --port 8080 $ kubectl -n demo expose deployment hello-cloud --port=80 --target-port=8080 --type=LoadBalancer
5. Service Multi-port • Define ◦ Label ◦ REST object ◦ Name kind: Service apiVersion: v1 metadata: name: my-service spec: selector: app: MyApp ports: - name: http protocol: TCP port: 80 targetPort: 9376 - name: https protocol: TCP port: 443 targetPort: 9377
6. HeadLess Service • What? ◦ External ◦ Manual kind: Endpoints apiVersion: v1 metadata: name: my-service subsets: - addresses: - ip: 1.2.3.4 ports: - port: 9376 kind: Service apiVersion: v1 metadata: name: my-service spec: ports: - protocol: TCP port: 80 targetPort: 9376
7. Proxy-Mode Processos $ ps aux | grep kube-proxy $ journalctl $ tail -f /var/log/kube-proxy.log Regras $ Kubectl -n demo get pods -o wide $ gcloud compute ssh <node> --zone <zone> $ iptables-save | grep hello
8. Service Type • ClusterIP ◦ Internal IP • NodePort ◦ NodeIP:NodePort • LoadBalancer ◦ ProviderAPI • ExternalName ◦ CNAME • ExternalIPs kind: Service apiVersion: v1 metadata: name: my-service spec: selector: app: MyApp ports: - name: http protocol: TCP port: 80 targetPort: 9376 externalIPs: - 80.11.12.10
9. Demo - Front + Back Colocar app no ar no cluster criado: • BACKEND • $ kubectl create -f https://k8s.io/examples/service/access/hello.yaml • $ kubectl create -f https://k8s.io/examples/service/access/hello-service.yaml • FRONTEND • $ kubectl create -f https://k8s.io/examples/service/access/frontend.yaml • $ kubectl get service frontend --watch
10. Special Tks to: My Family My Team kubernetes.io Tks a lot! Vocês são TOP!