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Zero to Kubernetes 01

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Knote

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Architecture

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App Architecture

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App Database Architecture

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App Database Storing files Architecture

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boot

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boot

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boot

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boot Render static pages

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boot Render static pages Upload files

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boot Render static pages Upload files Connect to the DB

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boot Render static pages Upload files Connect to the DB Users and authentication

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boot Render static pages Save documents Upload files Connect to the DB Users and authentication

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boot Render static pages Save documents Upload files Connect to the DB Users and authentication

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Packaging

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JS

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JS

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JS

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JS

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JS

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it works …

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it works … ON MY MACHINE

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v0.8 v0.8

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v0.8 v0.8 v0.10

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v0.8 v0.8 v0.10 v0.11

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v0.8 v0.8 v0.10 v0.11 v0.12

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JS

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JS

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JS

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Docker

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> docker run docker cli docker daemon

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> docker run CONTAINER docker cli docker daemon CONTAINER

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Building containers Docker

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~$ cat Dockerfile FROM ubuntu RUN apt-get update RUN apt-get -y install figlet ~$

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$ docker build -t app .

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$ docker build -t app .

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$ docker build -t app .

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$ docker build -t app .

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Running containers Docker

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$ docker run -ti app

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$ docker run -ti app

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$ docker run -ti app

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$ docker run -ti app

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Your turn

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Write the knote app Your turn

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Write the knote app Connect to th DB Your turn

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Write the knote app Connect to th DB Create the container Your turn

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Write the knote app Connect to th DB Create the container Run it as a container Your turn

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https://academy.learnk8s.io

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Ready?

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Steady

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https://academy.learnk8s.io

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Deploying knote in containers

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Deploying knote in containers

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boot

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boot

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boot

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Challenges with containers at scale

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boot

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?

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Container orchestrators

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Mesos

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Kubernetes Nomad Mesos Kubernetes vs Nomad vs Mesos past 5 years

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Datacentre as a single computer 01

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MASTER

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MASTER NODE NODE

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Node 2 Node 1 Node 3

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Node 2 Node 1 Node 3

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Deploying to Kubernetes

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Incoming traffic

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Incoming traffic

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Load balancer Incoming traffic

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Load balancer front-end Load balancer backend Incoming traffic

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Load balancer Load balancer front-end Load balancer backend Incoming traffic

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Load balancer Load balancer front-end Front-end service Load balancer backend Backend service Incoming traffic

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Load balancer Ingress Load balancer front-end Front-end service Load balancer backend Backend service Incoming traffic

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Load balancer Ingress Pod 1 Pod 2 Load balancer front-end Front-end service Pod 5 Load balancer backend Backend service Incoming traffic

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Ingress Pod 1 Pod 2 Front-end service Pod 5 Backend service Incoming traffic

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Deployment resource

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Ingress Incoming traffic Pod 1 Pod 2 Pod 3 Pod 4 Pod 5 Service

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Ingress Incoming traffic Pod 1 Pod 2 Pod 3 Pod 4 Pod 5 Service DEPLOYMENT

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Ingress Incoming traffic Pod 1 Pod 2 Pod 3 Pod 4 Pod 5 Service DEPLOYMENT

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Ingress Incoming traffic Pod 1 Pod 2 Pod 3 Pod 4 Pod 5 Service DEPLOYMENT

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Ingress Incoming traffic Pod 1 Pod 3 Pod 4 Pod 5 Service DEPLOYMENT

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Ingress Incoming traffic Pod 1 Pod 6 Pod 3 Pod 4 Pod 5 Service DEPLOYMENT

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Local cluster

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Deploy 3 replicas, please

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kubectl create -f deployment.yaml

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$ kubectl kubectl cli

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~$ cat deployment.yaml apiVersion: apps/v1 kind: Deployment metadata: name: app spec: selector: matchLabels: name: app template: metadata: labels: name: app spec: containers: - name: nginx image: nginx:1.7.9 ~$ _

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~$ cat deployment.json { "apiVersion": "apps/v1", "kind": "Deployment", "metadata": { "name": "app" }, "spec": { "selector": { "matchLabels": { "name": "app" } }, "template": { "metadata": { "labels": { "name": "app" } }, "spec": {

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API SERVER

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Your turn

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Create a local cluster Your turn

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Create a local cluster Deploy knote Your turn

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Create a local cluster Deploy knote Deploy MongoDB Your turn

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Create a local cluster Deploy knote Deploy MongoDB Verify the app works Your turn

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https://academy.learnk8s.io

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Ready?

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Steady

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https://academy.learnk8s.io

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Scaling

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Incoming traffic

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Incoming traffic

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Incoming traffic

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Incoming traffic

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Incoming traffic

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Incoming traffic

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Incoming traffic

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Incoming traffic

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Incoming traffic

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Incoming traffic

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Refactoring stateless

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boot

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boot

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boot

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KUBERNETES

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knote KUBERNETES

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knote KUBERNETES CREATE NOTE

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KUBERNETES knote MONGO DB TEXT CREATE NOTE

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knote MINIO MONGO DB KUBERNETES TEXT PICTURES CREATE NOTE