{"id":49311,"date":"2025-05-13T07:51:43","date_gmt":"2025-05-13T07:51:43","guid":{"rendered":"https:\/\/www.devopsschool.com\/blog\/?p=49311"},"modified":"2025-05-13T07:51:43","modified_gmt":"2025-05-13T07:51:43","slug":"what-is-google-cloud-cdn","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/what-is-google-cloud-cdn\/","title":{"rendered":"What is Google Cloud CDN?"},"content":{"rendered":"\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udccc What is Google Cloud CDN?<\/h2>\n\n\n\n<p><strong>Google Cloud CDN<\/strong> is a <strong>globally distributed content delivery network<\/strong> that accelerates the delivery of your web and media content by caching it closer to users at the edge of Google&#8217;s global infrastructure. It integrates tightly with Google Cloud services like <strong>Cloud Load Balancing<\/strong>, <strong>Cloud Storage<\/strong>, and <strong>Compute Engine<\/strong>.<\/p>\n\n\n\n<p>At its core, Cloud CDN:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reduces <strong>latency<\/strong> and <strong>load<\/strong> on your origin servers<\/li>\n\n\n\n<li>Improves content <strong>availability<\/strong><\/li>\n\n\n\n<li>Saves bandwidth<\/li>\n\n\n\n<li>Boosts user experience, especially in globally distributed apps<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83c\udf0d Key Features of Cloud CDN<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td><strong>Global Distribution<\/strong><\/td><td>Uses Google&#8217;s global edge network in over 150 locations.<\/td><\/tr><tr><td><strong>HTTP\/HTTPS Support<\/strong><\/td><td>Supports secure delivery with SSL\/TLS by default.<\/td><\/tr><tr><td><strong>Caching Rules<\/strong><\/td><td>Customizable cache key policies, TTLs, and cache invalidation.<\/td><\/tr><tr><td><strong>Integration with Load Balancer<\/strong><\/td><td>Works seamlessly with external HTTP(S) load balancers.<\/td><\/tr><tr><td><strong>Signed URLs and Cookies<\/strong><\/td><td>Restrict access to CDN content via signed authentication.<\/td><\/tr><tr><td><strong>Real-time Logging<\/strong><\/td><td>Integrated with Cloud Logging and Cloud Monitoring.<\/td><\/tr><tr><td><strong>IPv6 and HTTP\/2<\/strong><\/td><td>Supported out-of-the-box for modern web performance.<\/td><\/tr><tr><td><strong>Negative Caching<\/strong><\/td><td>Cache common HTTP errors (e.g., 404) to reduce server load.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83e\udde0 Use Cases<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Use Case<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td><strong>Website &amp; Web App Acceleration<\/strong><\/td><td>Improve performance of static content (HTML, CSS, JS).<\/td><\/tr><tr><td><strong>Media Delivery<\/strong><\/td><td>Efficiently deliver images, video, and audio globally.<\/td><\/tr><tr><td><strong>Software Downloads<\/strong><\/td><td>Distribute large files (e.g., firmware, binaries) faster.<\/td><\/tr><tr><td><strong>E-commerce<\/strong><\/td><td>Enhance user experience during flash sales or high load.<\/td><\/tr><tr><td><strong>API Caching<\/strong><\/td><td>Reduce latency and backend load for cacheable API calls.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u2699\ufe0f How to Set Up Cloud CDN \u2013 Step-by-Step<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83e\uddfe Prerequisites<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A Google Cloud project<\/li>\n\n\n\n<li>Static or dynamic content hosted on <strong>Backend service<\/strong><\/li>\n\n\n\n<li>Configured <strong>External HTTP(S) Load Balancer<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 1: Create a Backend Bucket or Backend Service<\/h3>\n\n\n\n<p>Backend options:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Compute Engine<\/strong> instance group<\/li>\n\n\n\n<li><strong>Cloud Storage bucket (with public access)<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Example:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">gcloud compute backend-buckets create my-<span class=\"hljs-keyword\">static<\/span>-bucket \\\n    --gcs-bucket-name=my-content-bucket\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 2: Create a URL Map<\/h3>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">gcloud compute url-maps create my-url-map \\\n    --<span class=\"hljs-keyword\">default<\/span>-backend-bucket=my-<span class=\"hljs-keyword\">static<\/span>-bucket\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 3: Create a Target HTTP(S) Proxy<\/h3>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">gcloud compute target-http-proxies create my-http-proxy \\\n    --url-map=my-url-map\n<\/code><\/span><\/pre>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 4: Reserve a Global IP Address<\/h3>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">gcloud compute addresses create my-<span class=\"hljs-keyword\">static<\/span>-ip \\\n    --ip-version=IPV4 \\\n    --<span class=\"hljs-keyword\">global<\/span>\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 5: Create a Forwarding Rule<\/h3>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">gcloud compute forwarding-rules create my-http-rule \\\n    --address=my-<span class=\"hljs-keyword\">static<\/span>-ip \\\n    --<span class=\"hljs-keyword\">global<\/span> \\\n    --target-http-proxy=my-http-proxy \\\n    --ports=<span class=\"hljs-number\">80<\/span>\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 6: Enable Cloud CDN on Backend<\/h3>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">gcloud compute backend-buckets update my-<span class=\"hljs-keyword\">static<\/span>-bucket \\\n    --enable-cdn\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Or, for Compute Engine:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">gcloud compute backend-services update my-backend-service \\\n    --enable-cdn \\\n    --<span class=\"hljs-keyword\">global<\/span>\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 Step 7: Test and Validate<\/h3>\n\n\n\n<p>Once your forwarding rule is live, you can:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Check headers like <code>X-Cache: HIT<\/code> (indicates a CDN hit)<\/li>\n\n\n\n<li>Invalidate the cache if needed:<\/li>\n<\/ul>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">gcloud compute backend-buckets invalidate-cdn-cache my-<span class=\"hljs-keyword\">static<\/span>-bucket \\\n    --path <span class=\"hljs-string\">\"\/*\"<\/span>\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd10 Optional Features<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th>What It Does<\/th><\/tr><\/thead><tbody><tr><td><strong>Signed URLs<\/strong><\/td><td>Grant time-limited access to specific users.<\/td><\/tr><tr><td><strong>Cache Modes<\/strong><\/td><td>Use <strong>CACHE_ALL_STATIC<\/strong>, <strong>USE_ORIGIN_HEADERS<\/strong>, or custom TTLs.<\/td><\/tr><tr><td><strong>Custom Cache Keys<\/strong><\/td><td>Include\/exclude query strings, headers, etc.<\/td><\/tr><tr><td><strong>Negative Caching<\/strong><\/td><td>Cache 4xx\/5xx responses to reduce retry pressure.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udd04 Cloud CDN vs Other Providers<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th>Google Cloud CDN<\/th><th>AWS CloudFront<\/th><th>Azure CDN<\/th><th>Cloudflare<\/th><\/tr><\/thead><tbody><tr><td>Edge Locations<\/td><td>~150+<\/td><td>300+<\/td><td>118+<\/td><td>275+<\/td><\/tr><tr><td>Tight GCP Integration<\/td><td>\u2705 Native<\/td><td>\u274c<\/td><td>\u274c<\/td><td>\u274c<\/td><\/tr><tr><td>Signed URLs<\/td><td>\u2705<\/td><td>\u2705<\/td><td>\u2705<\/td><td>\u2705<\/td><\/tr><tr><td>Real-time Logging<\/td><td>\u2705 via Cloud Logging<\/td><td>Partially<\/td><td>Yes<\/td><td>Yes<\/td><\/tr><tr><td>Custom Cache Control<\/td><td>\u2705<\/td><td>\u2705<\/td><td>\u2705<\/td><td>\u2705<\/td><\/tr><tr><td>Free Tier<\/td><td>Up to 1 TB\/month<\/td><td>1 TB\/month<\/td><td>5 GB\/month<\/td><td>Unmetered on Free<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udee0\ufe0f Tips for Optimization<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Use proper cache headers<\/strong>: Leverage <code>Cache-Control<\/code>, <code>ETag<\/code>, and <code>Expires<\/code>.<\/li>\n\n\n\n<li><strong>Enable GZIP\/Brotli<\/strong>: Reduce asset sizes.<\/li>\n\n\n\n<li><strong>Use Signed URLs<\/strong>: For secure file distribution (e.g., PDFs, software).<\/li>\n\n\n\n<li><strong>Monitor logs<\/strong>: Use Cloud Logging for real-time metrics and troubleshooting.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83e\uddfe Example Use Case: Accelerating Static Website<\/h2>\n\n\n\n<p>A company hosts a static site in a GCS bucket. By integrating Cloud CDN:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The site loads under 200ms worldwide<\/li>\n\n\n\n<li>Reduced backend GCS load by 90%<\/li>\n\n\n\n<li>Increased SEO ranking due to faster TTFB (Time to First Byte)<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83e\udde9 Cloud CDN Alternatives<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Service<\/th><th>When to Choose<\/th><\/tr><\/thead><tbody><tr><td><strong>Cloudflare CDN<\/strong><\/td><td>Need free-tier WAF, caching, and DDoS protection.<\/td><\/tr><tr><td><strong>AWS CloudFront<\/strong><\/td><td>Your workloads are on AWS and need Lambda@Edge.<\/td><\/tr><tr><td><strong>Akamai<\/strong><\/td><td>Enterprise-grade CDN with deep media\/video acceleration.<\/td><\/tr><tr><td><strong>Fastly<\/strong><\/td><td>Developer-first real-time edge logic CDN.<\/td><\/tr><tr><td><strong>Azure CDN<\/strong><\/td><td>Azure-native workloads, especially media streaming.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\ud83d\udcd8 Conclusion<\/h2>\n\n\n\n<p><strong>Google Cloud CDN<\/strong> offers a powerful, scalable, and cost-efficient solution for delivering content across the globe with low latency and high reliability. Its tight integration with Google Cloud Load Balancing and services like GCS and Compute Engine make it ideal for web apps, APIs, and static content acceleration.<\/p>\n\n\n\n<p>If you&#8217;re building a modern cloud-native or globally distributed application, <strong>Cloud CDN<\/strong> should be a core part of your infrastructure strategy.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udccc What is Google Cloud CDN? Google Cloud CDN is a globally distributed content delivery network that accelerates the delivery of your web and media content by caching it closer&#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[2],"tags":[],"class_list":["post-49311","post","type-post","status-publish","format-standard","hentry","category-uncategorised"],"_links":{"self":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/49311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/comments?post=49311"}],"version-history":[{"count":1,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/49311\/revisions"}],"predecessor-version":[{"id":49312,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/49311\/revisions\/49312"}],"wp:attachment":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/media?parent=49311"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/categories?post=49311"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/tags?post=49311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}