5 sls-mentor best practices

blog-posts/sls-mentor/5-best-practices/article.md

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+---
+published: true
+title: '5 Serverless Best Practices to Become a Skilled Cloud Architect'
+cover_image: https://raw.githubusercontent.com/pchol22/kumo-articles/master/blog-posts/sls-mentor/5-best-practices/assets/cover-image.png
+description: 'Discovers 5 serverless best practices that will help you build faster, cheaper, greener, more secure and stable serverless applications on AWS, using sls-mentor'
+tags: serverless, AWS, tutorial, beginners
+canonical_url:
+---
+
+### Discover serverless best practices with sls-mentor
+
+In this article, I will go through 5 low cost, high impact serverless best practices that will help you build faster, cheaper, greener, more secure and stable applications on AWS.
+
+Each best practice is illustrated with an infographic, to make it easy to understand and share with your colleagues. I hope you will enjoy it!
+
+This compilation is based on [🛡 sls-mentor 🛡][sls-mentor], my free open-source tool that **automatically checks 30 serverless best practices on your AWS serverless projects** (no matter the framework). Feel free to check it out!
+
+{% cta https://github.com/sls-mentor/sls-mentor %} Find sls-mentor on Github ⭐️ {% endcta %}
+
+### Let's connect!
+
+I you want to stay in touch here is my [twitter account][twitter]. I often post or re-post interesting stuff about AWS and serverless, feel free to follow me!
+
+{% cta https://twitter.com/PierreChollet22 %} Follow me on twitter 🚀 {% endcta %}
+
+## 1 - When deploying a Lambda function, use a ARM64 architecture instead of a x86_64 architecture
+
+Two Lambda function processors are available, how to choose wisely? 🤔
+
+Basically, **you should always go with ARM64** if your code is compatible! 🚀
+
+[🛡 sls-mentor][sls-mentor] has a rule that enforces the usage of ARM64 in your Lambda functions so that you never forget 🧠
+
+![Lambda ARM64 vs x86_64](./assets/arm64-vs-x86_64.png)
+
+## 2 - Use intelligent tiering on S3 Buckets to reduce storage costs
+
+Which storage class fits the best for my #AWS app?
+
+The choice is easy: **use Intelligent Tiering!** It automatically moves files between classes based on their usage.
+
+[🛡 sls-mentor][sls-mentor] automatically check that your buckets have Intelligent Tiering enabled, so that you never forget🧠
+
+![S3 Intelligent Tiering](./assets/s3-intelligent-tiering.png)
+
+## 3 - Deploy fast Lambda functions with bundles smaller than 5MB
+
+My Lambda function has insane cold starts, what should I do? 😿
+
+Short answer: **make its bundle smaller!** On a given runtime, bundle size is the n°1 cause of long cold starts 🐢
+
+[🛡 sls-mentor][sls-mentor] lists every Lambda function with a bundle larger than 5MB, try it on your @awscloud account!
+
+![Lambda bundle size](./assets/lambda-bundle-size.png)
+
+## 4 - Do not keep your CloudWatch logs forever to reduce storage costs
+
+CloudWatch by @awscloud is known to be expensive 💸
+
+There is a simple trick to reduce costs: 🚨Do not keep your logs forever🚨
+
+Storage is cheap, but accumulating it over years quickly gets out of hands 📈
+
+[🛡 sls-mentor][sls-mentor] can list Log Groups with infinite retention, try it out 🚀
+
+![CloudWatch Logs retention](./assets/cloudwatch-logs-retention.png)
+
+## 5 - Use an Authorizer on all your API Gateway endpoints to secure your API
+
+When deploying an API, **anyone with its URL can access your resources by default** 😱
+
+Authorizers allow you to secure your API, by relying on Cognito, IAM, or any custom integration.
+
+[🛡 sls-mentor][sls-mentor] can list all API Gateway endpoints without an Authorizer, try it out 🚀
+
+![API Gateway Authorizer](./assets/api-gateway-authorizer.png)
+
+## Many more best practices to discover and automate!
+
+[🛡 sls-mentor][sls-mentor] is a compilation of 30 serverless best-practices, that are automatically checked on your AWS serverless projects (no matter the framework). It is free and open source, feel free to check it out!
+
+{% cta https://github.com/sls-mentor/sls-mentor %} Find sls-mentor on Github ⭐️ {% endcta %}
+
+### Let's connect!
+
+I would really appreciate if you could react and share this article with your friends and colleagues. It will help me a lot to grow my audience. Also, don't forget to subscribe to be updated when the next article comes out!
+
+I you want to stay in touch here is my [twitter account][twitter]. I often post or re-post interesting stuff about AWS and serverless, feel free to follow me!
+
+{% cta https://twitter.com/PierreChollet22 %} Follow me on twitter 🚀 {% endcta %}
+
+[twitter]: https://twitter.com/PierreChollet22
+[sls-mentor]: https://www.sls-mentor.dev

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