Initial commit

.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto

01-containers/01-manual.sh

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+#!/bin/bash
+
+# pull an image from Docker Hub
+docker image pull ubuntu:latest
+
+# List all images
+docker images
+
+# Run a container interactively
+docker run -it ubuntu /bin/bash
+
+# Run a container in the background
+docker run -d ubuntu sleep 100
+
+# List running containers
+docker container ls
+
+# List all containers on the systems
+docker container ls -a
+
+# list all networks
+docker network ls
+
+# create a network
+docker network create frontend
+docker network create backend
+
+# provision voting app
+docker run -d -p 6379:6379 --name redis --network backend redis
+docker run -d -p 5000:80 --name vote --network frontend docker/example-voting-app-vote
+docker network connect backend vote
+docker run -d --name db --network=backend -e POSTGRES_HOST_AUTH_METHOD=trust postgres:9.4
+docker run -d --name worker --network=backend docker/example-voting-app-worker
+docker run -d --name result --network=frontend -p 5001:80 docker/example-voting-app-result
+docker network connect backend result

01-containers/02-compose.sh

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+#!/bin/bash
+
+# install compose plugin
+DOCKER_CONFIG=${DOCKER_CONFIG:-$HOME/.docker}
+mkdir -p $DOCKER_CONFIG/cli-plugins
+curl -SL https://github.com/docker/compose/releases/download/v2.17.2/docker-compose-linux-x86_64 -o $DOCKER_CONFIG/cli-plugins/docker-compose
+chmod +x $DOCKER_CONFIG/cli-plugins/docker-compose
+
+# Check compose version
+docker compose version
+
+# Run a compose service
+docker compose up

01-containers/03-swarm.sh

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+#!/bin/bash
+
+# Firewall rules
+ufw allow 22/tcp
+ufw allow 2376/tcp
+ufw allow 2377/tcp
+ufw allow 7946/tcp
+ufw allow 7946/udp
+ufw allow 4789/udp
+
+# Initialize swarm
+docker swarm init
+
+# Join swarm
+docker swarm join --token <Token> <Leader-IP>:2377
+
+# Checlk swarm nodes
+docker node ls
+
+# Enabling swarm creates an overlay network
+docker network ls
+
+# Create a service
+docker service create --replicas 2 --name nginx --publish 8080:80 nginx:latest
+
+# Create declaratively
+docker stack deploy -c docker-stack.yaml voting-app
+
+# Inspect services
+docker stack services voting-app
+docker service ps voting-app_vote
+
+# Working with stack
+docker stack ps voting-app
+docker stack rm voting-app

01-containers/docker-compose.yml

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+services:
+  redis:
+    image: redis:latest
+    networks:
+      - backend
+
+  vote:
+    image: docker/example-voting-app-vote:latest
+    ports:
+      - 5000:80
+    networks:
+      - frontend
+      - backend
+    depends_on:
+      - redis
+
+  db:
+    image: postgres:9.4
+    environment:
+      - POSTGRES_HOST_AUTH_METHOD=trust
+    networks:
+      - backend
+
+  worker:
+    image: docker/example-voting-app-worker
+    networks:
+      - backend
+    depends_on:
+      - db
+
+  result:
+    image: docker/example-voting-app-result
+    networks:
+      - frontend
+      - backend
+    ports:
+      - 5001:80
+    depends_on:
+      - db
+      - worker
+
+networks:
+  frontend:
+  backend:

01-containers/docker-stack.yaml

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+version: "3.9"
+services:
+  redis:
+    image: redis:latest
+    networks:
+      - backend
+
+  vote:
+    image: docker/example-voting-app-vote:latest
+    ports:
+      - 5000:80
+    networks:
+      - frontend
+      - backend
+    depends_on:
+      - redis
+    deploy:
+      replicas: 2
+
+  db:
+    image: postgres:9.4
+    environment:
+      - POSTGRES_HOST_AUTH_METHOD=trust
+    networks:
+      - backend
+
+  worker:
+    image: docker/example-voting-app-worker
+    networks:
+      - backend
+    depends_on:
+      - db
+
+  result:
+    image: docker/example-voting-app-result
+    networks:
+      - frontend
+      - backend
+    ports:
+      - 5001:80
+    depends_on:
+      - db
+      - worker
+    deploy:
+      replicas: 2
+
+networks:
+  frontend:
+  backend:

02-get-started/kubectl.sh

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+#!/bin/bash
+
+# Check if kubectl is working
+kubectl version --output=json
+
+# Get help
+kubectl explain pods

02-get-started/minikube.ps1

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+New-Item -Path 'c:\' -Name 'minikube' -ItemType Directory -Force
+Invoke-WebRequest -OutFile 'c:\minikube\minikube.exe' -Uri 'https://github.com/kubernetes/minikube/releases/latest/download/minikube-windows-amd64.exe' -UseBasicParsing
+
+$oldPath = [Environment]::GetEnvironmentVariable('Path', [EnvironmentVariableTarget]::Machine)
+if ($oldPath.Split(';') -inotcontains 'C:\minikube'){
+  [Environment]::SetEnvironmentVariable('Path', $('{0};C:\minikube' -f $oldPath), [EnvironmentVariableTarget]::Machine)
+}
+
+minikube start

03-pods/pod.yml

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+apiVersion: v1
+kind: Pod
+metadata:
+  name: nginx
+  labels:
+    app: nginx
+    tier: frontend
+spec:
+  containers:
+    - name: nginx
+      image: nginx

03-pods/pods.sh

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+kubectl apply -f .\vote.yml
+kubectl apply -f .\result.yml
+
+kubectl get pods
+
+kubectl describe pods vote
+
+kubectl exec -it vote -- sh

04-replicasets/rs.yml

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+apiVersion: apps/v1
+kind: ReplicaSet
+metadata:
+  name: myapp-replicaset
+  labels:
+    app: myapp
+spec:
+  selector:
+    matchLabels:
+      tier: frontend
+  replicas: 4
+  template:
+    metadata:
+      name: nginx-2
+      labels:
+        tier: frontend
+    spec:
+      containers:
+        - name: nginx
+          image: nginx

05-deployments/deploy.yml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: myapp-deploment
+  labels:
+    tier: frontend
+    app: nginx
+spec:
+  selector:
+    matchLabels:
+      tier: frontend
+  replicas: 3
+  template:
+    metadata:
+      name: nginx-2
+      labels:
+        app: nginx
+        tier: frontend
+    spec:
+      containers:
+      - name: nginx
+        image: nginx

06-services/clusterip/db-service.yml

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+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: db
+  name: db
+spec:
+  type: ClusterIP
+  ports:
+  - name: "db-service"
+    port: 5432
+    targetPort: 5432
+  selector:
+    app: db
+

06-services/clusterip/db.yml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: db
+  name: db
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: db
+  template:
+    metadata:
+      labels:
+        app: db
+    spec:
+      containers:
+      - image: postgres:15-alpine
+        name: postgres
+        env:
+        - name: POSTGRES_USER
+          value: postgres
+        - name: POSTGRES_PASSWORD
+          value: postgres
+        ports:
+        - containerPort: 5432
+          name: postgres
+        volumeMounts:
+        - mountPath: /var/lib/postgresql/data
+          name: db-data
+      volumes:
+      - name: db-data
+        emptyDir: {} 

06-services/clusterip/redis-service.yml

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+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: redis
+  name: redis
+spec:
+  type: ClusterIP
+  ports:
+  - name: "redis-service"
+    port: 6379
+    targetPort: 6379
+  selector:
+    app: redis
+

06-services/clusterip/redis.yml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  labels:
+    app: redis
+  name: redis
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: redis
+  template:
+    metadata:
+      labels:
+        app: redis
+    spec:
+      containers:
+      - image: redis:alpine
+        name: redis
+        ports:
+        - containerPort: 6379
+          name: redis
+        volumeMounts:
+        - mountPath: /data
+          name: redis-data
+      volumes:
+      - name: redis-data
+        emptyDir: {} 

06-services/clusterip/result-service.yml

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+apiVersion: v1
+kind: Service
+metadata:
+  labels:
+    app: result
+  name: result
+spec:
+  type: NodePort
+  ports:
+  - name: "result-service"
+    port: 5001
+    targetPort: 80
+    nodePort: 31001
+  selector:
+    app: result