Kops = Kubernetes per tutti

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1 !1 Kops = Kubernetes per tutti Introduzione al cluster Kubernetes secondo Kops di Valentino Pistis

2 !2 Chi sono? Guasila Software Engineer Padre...durante il tempo libero

3 !3 Cos'è un cluster Wikipedia: è un insieme di computer connessi tra loro tramite una rete telematica.

4 !4 Cos'è un cluster cluster di computer fisici

5 !5 Cos'è un cluster computer virtuali

6 !6 Cos'è un cluster cluster di containers? No...ma quasi...

7 !7 Cos'è un container LXC -> linux containers

8 !8 Cos'è un container Wikipedia: Linux Container...è un ambiente di virtualizzazione a container, che opera a livello del sistema operativo e permette di eseguire diversi ambienti Linux virtuali isolati tra loro...

9 !9 Cos'è un container

10 !10 Kubernetes Wikipedia: e' un sistema di orchestrazione e gestione di container.

11 !11 Kubernetes Architettura

12 !12 Kubernetes Pods Un POD rappresenta un processo in esecuzione sul cluster kubernetes

13 !13 Kubernetes Deployments

14 !14 Kubernetes apiversion: apps/v1 kind: Deployment metadata: name: nginx-deployment labels: k8s-app: myapp spec: replicas: 3 selector: matchlabels: k8s-app: myapp template: metadata: labels: k8s-app: myapp spec: containers: - name: nginx image: nginx: resources: limits: cpu: 200m memory: 700Mi requests: cpu: 100m memory: 500Mi ports: - containerport: 80

15 !15 Kubernetes Services

16 !16 Kubernetes apiversion: v1 kind: Service metadata: labels: k8s-app: myapp name: myapp-service namespace: my-namespace annotations: spec: ports: - name: http port: 80 protocol: TCP targetport: 80 - name: https port: 443 protocol: TCP targetport: 80 selector: k8s-app: myapp sessionaffinity: None type: ClusterIP

17 !17 Kubernetes Ingress

18 !18 apiversion: extensions/v1beta1 kind: Ingress metadata: name: myapp-ingress namespace: my-namespace annotations: spec: rules: - host: myapp.org http: paths: - path: backend: servicename: myapp-service serviceport: 80 Kubernetes

19 !19 Kubernetes Persistent Volumes

20 !20 Kubernetes apiversion: v1 kind: PersistentVolumeClaim metadata: name: pvc-my-disk namespace: my-namespace spec: accessmodes: - ReadWriteOnce resources: requests: storage: 3Gi

21 !21 Kubernetes Horizontal Pod Autoscaler

22 !22 Kubernetes apiversion: autoscaling/v2beta1 kind: HorizontalPodAutoscaler metadata: name: myapp-hpa namespace: my-namespace spec: scaletargetref: apiversion: apps/v1beta1 kind: Deployment name: myapp minreplicas: 1 maxreplicas: 10 metrics: - type: Resource resource: name: cpu targetaverageutilization: 90 - type: Resource resource: name: memory targetaverageutilization: 90

23 !23 Kubernetes Cluster Autoscaler

24 !24 Kubernetes Monitoring e Logging

25 !25 Kubernetes Site Reliability Engineering: is a discipline that incorporates aspects of software engineering and applies that to IT operations problems

26 !26 Kubernetes Creazione cluster

27 !27 Kops Come funziona

28 !28 Kops

29 !29 Kops macos: brew update && brew install kops installare kops Linux: curl -LO -s grep tag_name cut -d '"' -f 4)/kops-linux-amd64 chmod +x kops-linux-amd64 sudo mv kops-linux-amd64 /usr/local/bin/kops

30 !30 Kops IAM per kops aws iam create-group --group-name kops aws iam attach-group-policy --policy-arn arn:aws:iam::aws:policy/amazonec2fullaccess --groupname kops aws iam attach-group-policy --policy-arn arn:aws:iam::aws:policy/amazonroute53fullaccess --groupname kops aws iam attach-group-policy --policy-arn arn:aws:iam::aws:policy/amazons3fullaccess --group-name kops aws iam attach-group-policy --policy-arn arn:aws:iam::aws:policy/iamfullaccess --group-name kops aws iam attach-group-policy --policy-arn arn:aws:iam::aws:policy/amazonvpcfullaccess --groupname kops aws iam create-user --user-name kops aws iam add-user-to-group --user-name kops --group-name kops aws iam create-access-key --user-name kops

31 !31 Kops S3 Bucket per cluster state storage aws s3api create-bucket --bucket my-cluster-state-store --region aws-region -- create-bucket-configuration LocationConstraint=aws-region aws s3api put-bucket-versioning --bucket my-cluster-state-store --versioningconfiguration Status=Enabled`

32 !32 Kops Un solo comando Kops per accendere Kubernetes su AWS: kops create cluster --cloud aws --zones aws-zone my-cluster-name --yes Un solo comando per distruggere: kops delete cluster --name my-cluster-name --yes Due comandi per aggiornare il cluster: kops update cluster my-cluster-name --yes kops rolling-update cluster my-cluster-name --yes

33 !33 kops validate cluster Comandi utili

34 !34 Comandi utili (my-kube-cluster-name namespace) ~> kops validate cluster Using cluster from kubectl context: my-kube-cluster-name Validating cluster my-kube-cluster-name INSTANCE GROUPS NAME ROLE MACHINETYPE MIN MAX SUBNETS app-nodes Node t2.large 1 20 eu-west-2b db-nodes Node t2.large 1 8 eu-west-2b master-eu-west-2b Master c4.large 1 3 eu-west-2b NODE STATUS NAME ROLE READY ip-x-x-x-x.eu-west-2.compute.internal node True ip-x-x-x-x..eu-west-2.compute.internal node True ip-x-x-x-x..eu-west-2.compute.internal node True ip-x-x-x-x..eu-west-2.compute.internal master True ip-x-x-x-x..eu-west-2.compute.internal node True ip-x-x-x-x..eu-west-2.compute.internal node True Your cluster my-kube-cluster-name is ready

35 !35 Comandi utili kubectl top pods kubectl top nodes kubectl apply -f config-file.yaml

36 !36 Comandi utili kubectl top pods NAME CPU(cores) MEMORY(bytes) deployment-name-xxxxxxx-xxxxxx 18m 53Mi kubectl top nodes NAME CPU(cores) CPU% MEMORY(bytes) MEMORY% ip-x-x-x-x.eu-west-2.compute.internal 415m 20% 5236Mi 66% ip-x-x-x-x.eu-west-2.compute.internal 108m 5% 4845Mi 61%

37 !37 Kops Kubernetes Dashboard

38 !38 Kops e ora? Docker: la tua applicazione web Load Balancer: Zalando skipper e aws ingress controller.. Logging: Fluentd, Mongo, ElasticSearch... Monitoring: Prometheus, Grafana...

39 !39 Grazie! Valentino Pistis