chore: commit save point

mmmarceleza · Aug 10, 2023 · 4c833bc · 4c833bc
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diff --git a/docker/examples/03/.dockerignore b/docker/examples/03/.dockerignore
@@ -0,0 +1,3 @@
+node_modules
+npm-debug.log
+
diff --git a/docker/examples/03/.env b/docker/examples/03/.env
@@ -0,0 +1 @@
+BACKGROUND_COLOR=#00ff00
diff --git a/docker/examples/03/Dockerfile b/docker/examples/03/Dockerfile
@@ -0,0 +1,27 @@
+# === Stage 1: Build the Node.js application ===
+FROM node:latest as builder
+
+WORKDIR /app
+
+# Copy the application code and .env file
+COPY package.json ./
+COPY index.js ./
+COPY .env ./
+
+# Install dependencies
+RUN npm install --production
+
+# === Stage 2: Create the final lightweight image ===
+FROM node:alpine
+
+WORKDIR /app
+
+# Copy the Node.js application and .env file from the builder stage
+COPY --from=builder /app .
+
+# Expose port 8000 for the web server
+EXPOSE 8000
+
+# Start the Node.js web server when the container starts
+CMD ["node", "index.js"]
+
diff --git a/docker/examples/03/index.html b/docker/examples/03/index.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>Hello World</title>
+<style>
+body {
+  background-color: #<%= background_color %>;
+}
+</style>
+</head>
+<body>
+<h1>Hello World</h1>
+</body>
+</html>
+
diff --git a/docker/examples/03/index.js b/docker/examples/03/index.js
@@ -0,0 +1,75 @@
+const http = require('http');
+const fs = require('fs');
+const path = require('path');
+
+const indexHTML = `
+<!DOCTYPE html>
+<html>
+<head>
+	<title>Hello World</title>
+	<style>
+		body {
+			margin: 0;
+			padding: 0;
+			--background-color: %s;
+			background-color: var(--background-color);
+			display: flex;
+			justify-content: center;
+			align-items: center;
+			height: 100vh;
+			font-size: 100px;
+			color: white;
+		}
+	</style>
+</head>
+<body>
+	<div>Hello World</div>
+
+	<script>
+		function updateBackgroundColor() {
+			const helloWorldElement = document.querySelector('body');
+			helloWorldElement.style.backgroundColor = getComputedStyle(helloWorldElement).getPropertyValue('--background-color');
+		}
+
+		// Call the updateBackgroundColor function initially
+		updateBackgroundColor();
+
+		// Periodically check for changes in the BACKGROUND_COLOR variable and update the background color
+		setInterval(updateBackgroundColor, 1000);
+	</script>
+</body>
+</html>
+`;
+
+function readBackgroundColorFromEnvFile() {
+	const envFilePath = path.join(__dirname, '.env');
+	let backgroundColor;
+	try {
+		const envFileContent = fs.readFileSync(envFilePath, 'utf8');
+		const envVars = envFileContent.split('\n');
+		for (const envVar of envVars) {
+			const [key, value] = envVar.split('=');
+			if (key === 'BACKGROUND_COLOR') {
+				backgroundColor = value;
+				break;
+			}
+		}
+	} catch (err) {
+		console.error('Error reading .env file:', err);
+	}
+	return backgroundColor || '#ff0000';
+}
+
+const server = http.createServer((req, res) => {
+	const backgroundColor = readBackgroundColorFromEnvFile();
+
+	res.setHeader('Content-Type', 'text/html');
+	res.write(indexHTML.replace('%s', backgroundColor));
+	res.end();
+});
+
+const port = 8000;
+server.listen(port, () => {
+	console.log(`Server started on http://localhost:${port}`);
+});
+
diff --git a/docker/examples/03/main.go b/docker/examples/03/main.go
@@ -0,0 +1,86 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"path/filepath"
+)
+
+const indexHTML = `
+<!DOCTYPE html>
+<html>
+<head>
+	<title>Hello World</title>
+	<style>
+		body {
+			margin: 0;
+			padding: 0;
+			--background-color: %s;
+			background-color: var(--background-color);
+			display: flex;
+			justify-content: center;
+			align-items: center;
+			height: 100vh;
+			font-size: 24px;
+			color: white;
+		}
+	</style>
+</head>
+<body>
+	<div>Hello World</div>
+
+	<script>
+		function updateBackgroundColor() {
+			const helloWorldElement = document.querySelector('body');
+			helloWorldElement.style.backgroundColor = getComputedStyle(helloWorldElement).getPropertyValue('--background-color');
+		}
+
+		// Call the updateBackgroundColor function initially
+		updateBackgroundColor();
+
+		// Periodically check for changes in the BACKGROUND_COLOR variable and update the background color
+		setInterval(updateBackgroundColor, 1000);
+	</script>
+</body>
+</html>
+`
+
+func readBackgroundColorFromEnvFile() (string, error) {
+	envFilePath := filepath.Join("/app", ".env")
+	content, err := ioutil.ReadFile(envFilePath)
+	if err != nil {
+		return "", err
+	}
+	return string(content), nil
+}
+
+func helloWorldHandler(w http.ResponseWriter, r *http.Request) {
+	backgroundColor, err := readBackgroundColorFromEnvFile()
+	if err != nil {
+		log.Printf("Error reading .env file: %v\n", err)
+		// Default background color (red) if .env file cannot be read or the value is empty
+		backgroundColor = "#ff0000"
+	}
+
+	// Set the Content-Type header to serve HTML
+	w.Header().Set("Content-Type", "text/html")
+
+	// Format the HTML page with the correct background color and send it as the response
+	html := fmt.Sprintf(indexHTML, backgroundColor)
+	fmt.Fprint(w, html)
+}
+
+func main() {
+	http.HandleFunc("/", helloWorldHandler)
+
+	port := "8000"
+	log.Printf("Server started on http://localhost:%s\n", port)
+	err := http.ListenAndServe(":"+port, nil)
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
diff --git a/docker/examples/03/package.json b/docker/examples/03/package.json
@@ -0,0 +1,10 @@
+{
+  "name": "hello-world-app",
+  "version": "1.0.0",
+  "description": "Hello World Node.js App",
+  "main": "index.js",
+  "author": "Your Name",
+  "license": "MIT",
+  "dependencies": {}
+}
+
diff --git a/docker/examples/04/.env b/docker/examples/04/.env
@@ -0,0 +1 @@
+BACKGROUND_COLOR=#00ff00
diff --git a/docker/examples/04/Dockerfile b/docker/examples/04/Dockerfile
@@ -0,0 +1,28 @@
+# === Stage 1: Build the Go binary ===
+FROM golang:latest as builder
+
+# Set the working directory inside the container
+WORKDIR /app
+
+# Copy the Go source code and .env file into the container
+COPY main.go ./
+
+# Build the Go application inside the container
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o web-server main.go
+
+# === Stage 2: Create the final lightweight image ===
+FROM alpine:latest
+
+# Set the working directory inside the container
+WORKDIR /app
+
+# Copy the Go binary from the builder stage
+COPY --from=builder /app/web-server .
+
+COPY .env ./
+# Expose port 8000 for the web server
+EXPOSE 8000
+
+# Start the Go web server when the container starts
+CMD ["./web-server"]
+
diff --git a/docker/examples/04/main.go b/docker/examples/04/main.go
@@ -0,0 +1,98 @@
+// main.go
+
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+const indexHTML = `
+<!DOCTYPE html>
+<html>
+<head>
+	<title>Hello World</title>
+	<style>
+		body {
+			margin: 0;
+			padding: 0;
+			--background-color: %s;
+			background-color: var(--background-color);
+			display: flex;
+			justify-content: center;
+			align-items: center;
+			height: 100vh;
+			font-size: 24px;
+			color: white;
+		}
+	</style>
+</head>
+<body>
+	<div>Hello World</div>
+
+	<script>
+		function updateBackgroundColor() {
+			const helloWorldElement = document.querySelector('body');
+			helloWorldElement.style.backgroundColor = getComputedStyle(helloWorldElement).getPropertyValue('--background-color');
+		}
+
+		// Call the updateBackgroundColor function initially
+		updateBackgroundColor();
+
+		// Periodically check for changes in the BACKGROUND_COLOR variable and update the background color
+		setInterval(updateBackgroundColor, 1000);
+	</script>
+</body>
+</html>
+`
+
+func readBackgroundColorFromEnvFile() (string, error) {
+	envFilePath := filepath.Join("/app", ".env")
+	content, err := os.ReadFile(envFilePath)
+	if err != nil {
+		return "", err
+	}
+
+	// Split lines and find the BACKGROUND_COLOR
+	lines := strings.Split(string(content), "\n")
+	for _, line := range lines {
+		parts := strings.SplitN(line, "=", 2)
+		if len(parts) == 2 && parts[0] == "BACKGROUND_COLOR" {
+			return strings.TrimSpace(parts[1]), nil
+		}
+	}
+
+	return "", fmt.Errorf("BACKGROUND_COLOR not found in .env file")
+}
+
+func helloWorldHandler(w http.ResponseWriter, r *http.Request) {
+	backgroundColor, err := readBackgroundColorFromEnvFile()
+	if err != nil {
+		log.Printf("Error reading .env file: %v\n", err)
+		// Default background color (red) if .env file cannot be read or the value is empty
+		backgroundColor = "#ff0000"
+	}
+
+	// Set the Content-Type header to serve HTML
+	w.Header().Set("Content-Type", "text/html")
+
+	// Format the HTML page with the correct background color and send it as the response
+	html := fmt.Sprintf(indexHTML, backgroundColor)
+	fmt.Fprint(w, html)
+}
+
+func main() {
+	http.HandleFunc("/", helloWorldHandler)
+
+	port := "8000"
+	log.Printf("Server started on http://localhost:%s\n", port)
+	err := http.ListenAndServe(":"+port, nil)
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
diff --git a/kubernetes/kustomize/examples/05/base/deployment.yaml b/kubernetes/kustomize/examples/05/base/deployment.yaml
@@ -0,0 +1,22 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: deploy
+  namespace: default
+  labels:
+    app: nginx
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: nginx
+  template:
+    metadata:
+      labels:
+        app: nginx
+    spec:
+      containers:
+        - name: nginx
+          image: nginx
+          ports:
+            - containerPort: 80
diff --git a/kubernetes/kustomize/examples/05/configmap.yaml b/kubernetes/kustomize/examples/05/configmap.yaml
@@ -0,0 +1,7 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: teste
+  namespace: default
+data:
+  key: value
diff --git a/kubernetes/kustomize/examples/05/deployment.yaml b/kubernetes/kustomize/examples/05/deployment.yaml
@@ -0,0 +1,7 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: deploy
+  namespace: default
+spec:
+  replicas: 2