10 Kube Commandments...Public Cloud Datacenter Your Desktop • GKE on Google Cloud • AKS on Azure...
Transcript of 10 Kube Commandments...Public Cloud Datacenter Your Desktop • GKE on Google Cloud • AKS on Azure...
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10 Kube Commandments
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We've been in the game for years
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That in itself is admirable
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There's rules to this biz
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We wrote y'all a manual
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A step-by-step conf talk for you to get...
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Your clusters on track
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And not your releases pushed back
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Staff Software Engineer Heptio
Lots of years Years of Experience @bryanl
Bryan Liles
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Senior Software Engineer DigitalOcean
Observability Cloud Compute Services Systems Engineering @cagedmantis
Carlos Amedee
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Rule Number Uno To go fast, you must start slow
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Rule Number Uno To go fast, you must start
deliberately
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Public Cloud Datacenter Your Desktop
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Public Cloud Datacenter Your Desktop
• GKE on Google Cloud • AKS on Azure • *lots of vendors*
• kubeadm • *lots of vendors*
• Minikube • Minik8s • Docker for Mac or Windows
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Public Cloud Datacenter
• GKE on Google Cloud • AKS on Azure • *lots of vendors*
• kubeadm • *lots of vendors*X X
Not Declarative
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Cluster API
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Number Two Always let them know your next move
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Your next move is the images you'll deploy to your cluster
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Build Image Host Image
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docker build
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docker build
•buildah •img •GCP Container Builder
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Why are you still building your containers with root privileges?
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Rule Number Three Never trust nobody: Hookup up
that Pod Security Policy
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apiVersion: extensions/v1beta1 kind: PodSecurityPolicy metadata: name: how-not-to-get-robbed spec: privileged: false runAsUser: rule: MustRunAsNonRoot seLinux: rule: RunAsAny fsGroup: rule: RunAsAny supplementalGroups: rule: RunAsAny volumes: - nfs
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Number Four I know you heard this before: Never
get high off what Kube supplies
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Custom Resource Definition
CRD Custom Controller
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Custom Resources Pattern
CRD Custom Controller
K8s External
Resource
Native Resource
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Custom Resources Pattern
CRD Custom Controller Operator
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Custom Resources Pattern
CRD Custom Controller
Native Resource
Native Resource
Native Resource
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Rule Number Five Communicating With Pods
Never Mix Internal and External Traffic
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Ingress Traffic
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Cluster IP
apiVersion: v1kind: Servicemetadata: name: sample-servicespec: selector: app: sample-app type: ClusterIP ports: - name: http port: 80 targetPort: 80 protocol: TCP
PodPod Pod
Service
Proxy
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Node Port
apiVersion: v1kind: Servicemetadata: name: my-nodeport-servicespec: selector: app: my-app type: NodePort ports: - name: http port: 80 targetPort: 80 nodePort: 30036 protocol: TCP
PodPod Pod
Service
Pod
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Load Balancer
apiVersion: v1kind: Servicemetadata: name: sample-lbspec: selector: app: some-app type: LoadBalancer ports: - name: http port: 80 targetPort: 80 protocol: TCP
PodPod Pod
Service
Load Balancer
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IngressapiVersion: extensions/v1beta1kind: Ingressmetadata: name: my-ingressspec: backend: serviceName: other servicePort: 8080 rules: - host: foo.mydomain.com http: paths: - backend: serviceName: foo servicePort: 8080 - host: mydomain.com http: paths: - path: /bar/* backend: serviceName: bar servicePort: 8080
PodPod Pod
Service
Ingress
PodPod Pod
Service
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Egress Traffic
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Egress
apiVersion: networking.k8s.io/v1kind: NetworkPolicymetadata: name: sample-network-policyspec: podSelector: matchLabels: role: my-app policyTypes: - Egress egress: - to: - ipBlock: cidr: 10.0.0.0/24
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Service Mesh
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Rule Number Six If You Think You Know What’s
Happening In Your Cluster… Forget it.
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Observability
What’s happening in your cluster?
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What’s happening on your cluster?
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Metrics and Alerting
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Logging
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Distributed Tracing
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Observability Dashboard
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Horizontal Pod Autoscaler
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Rule Number Seven Keep your storage and the business
rules to manage it completely separated.
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Storage
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Easily create your own storage implementation
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Persistent Volume Snapshots
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Number 8: Using Tools
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Package Management
Configuration Management
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• Helm 2 • Bounds of YAML
Package Management
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Configuration Management
• ksonnet • Pulumi • Ballerina
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Other types of tools?
• skaffold • kustomize
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Number 9: Extending Kubernetes
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What happens if you get an API for free?
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What happens when you outgrow the Kubernetes API?
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Number 10: A live word called refinement -- Building On
Kubernetes
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Cluster
App 1 App 2 App 3
"On top of Kubernetes"
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Cluster
App 1 App 2 App 3
"On Kubernetes"
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Follow these rules
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You'll have mad bread to break up
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If not, 24 hours of on-call with constant wake ups.