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‫The first pillar in the well-architected framework,

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‫is going to be operational excellence,

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‫so operational excellence includes the ability to run

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‫and monitor systems to deliver business values

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‫and to continuously improve

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‫supporting processes and procedures.

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‫It's about having operations that are great.

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‫There are design principles that you need to know about,

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‫and questions that you ask yourself.

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‫First of all,

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‫all your operations should be code,

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‫infrastructure as code is going to be the cornerstone

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‫of operational excellence,

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‫and remember infrastructure as code is CloudFormation.

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‫You need to annotate documentation,

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‫so when you create documentation,

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‫make sure it's annotated,

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‫make sure it's commented,

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‫make sure it's clean

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‫and generated after every build of your application.

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‫You need to make frequent and small reversible changes,

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‫so that, in case of failures, you can reverse it.

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‫If you make huge changes every three months,

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‫this is not going to go well.

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‫You need to refine operations procedures frequently,

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‫so as the team gets more familiar with the operations,

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‫refine it, automate more, and make improvements.

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‫Finally, anticipate failure, that will always happen,

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‫and you need to learn from all these failures, okay?

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‫Failures do happen and they're great,

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‫failures is when you actually learn,

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‫when I fail, I learn, so you should do the same,

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‫and this is the design principles of operational excellence.

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‫So now, I'd like to just transcribe it

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‫in terms of AWS Services,

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‫and the first one is going to be Prepare.

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‫So, Prepare is going to be how do we basically

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‫prepare everything to have operational excellence.

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‫So you should use run books,

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‫you should have good infrastructure standards,

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‫you should do run deployments,

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‫and like, mock deployments,

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‫and for this, we could use AWS CloudFormation,

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‫basically to prepare everything

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‫as a nice infrastructure as code,

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‫and then Config would be really nice as well,

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‫to be using, we haven't seen Config in-depth in this course,

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‫but Config could be used to evaluate

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‫the compliance of your CloudFormation templates.

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‫Then, Operate, you need to operate

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‫and basically automate as much as you can,

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‫you should release fast,

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‫you should avoid manual processes.

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‫So, again, CloudFormation would be a great tool for this.

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‫Config as well.

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‫CloudTrail to make sure to track

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‫all the API codes that are done,

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‫and make sure nothing is done on purpose,

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‫or nothing is changed manually.

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‫CloudWatch to basically monitor

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‫the performance over time of your stack,

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‫and make sure that if you need to operate it,

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‫you know what operations to do.

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‫And finally X-Ray,

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‫it's not something we've seen in-depth in this course

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‫but X-Ray will be able to trace API calls,

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‫to trace HTP requests

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‫and to make sure that they're working correctly,

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‫and if they're not working correctly,

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‫it will point us to where the incorrect stuff happened.

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‫Finally, you need to evolve your infrastructure over time.

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‫So how do we do this?

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‫Well, again, CloudFormation as you understand it,

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‫CloudFormation is a centerpiece

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‫of this whole operational excellence pillar,

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‫but also you need to be able to evolve over time,

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‫so all this CICD tools basically CodeBuild,

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‫CodeCommit, CodeDeploy, CodePipeline,

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‫allow you to basically iterate quickly,

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‫deploy quickly, deploy often,

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‫deploy small changes,

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‫and all these things will contribute

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‫to operational excellence.

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‫Now remember, just going into the exam,

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‫you don't need to understand or remember any of that.

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‫I'm just trying to educate you,

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‫to all the AWS Services, and how they can help

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‫with this operational excellence pillar.

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‫This is just educative, okay?

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‫Have a read through the pillar, by the way,

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‫on the white paper if you want to,

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‫but here I'm just trying to give you a small rundown.

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‫You don't need to remember all these services,

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‫and there's not, this service corresponds exactly to that,

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‫operational pillar, or whatever,

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‫but it's just to give you ideas of how all these services

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‫can be used as a synergy to basically

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‫drive operational excellence.

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‫Alright, so that's it for this lecture,

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‫I will see you in the next one.