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‫The first thing I have to do is to go to

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‫commands and I will basically create an s3 bucket.

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‫For this we know the command line now is aws s3 make bucket

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‫and I will just say stephane-code-sam.

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‫Should be a unique name, obviously,

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‫you need to change the s3 bucket to a name you have.

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‫I have a terminal right here so I'll just go ahead

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‫and paste this aws s3 make bucket and now we have made

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‫my bucket stephane-code-sam.

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‫If I go to my s3 and refresh now we see there is

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‫stephane-code-sam as a bucket that was created

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‫and now it's empty.

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‫So we need to start uploading code and so

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‫the first thing you want to do is

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‫package our cloudformation and so

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‫for this we will do aws cloudformation package

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‫and we will have to specify the right parameters.

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‫So let's do this function, cloudformation package,

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‫press enter and we'll do help to get some information

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‫around what we should be doing.

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‫If you scroll down, we see that we have to specify

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‫the s3 bucket we're in so we'll say

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‫s3 bucket is stephane-code-sam, okay.

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‫Then you need to specify the template file we have.

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‫The template file we have is going to be template.yaml .

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‫Then the output template file,

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‫because we generate something,

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‫is going to go under a gen directory.

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‫I'm just going to have a gen directory

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‫because we generate code, so I'll say gen

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‫and here I will say template-generated.yaml.

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‫This is going to be out transformed cloudformation template.

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‫This looks about right, it looks like I have everything

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‫I need for this function.

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‫Let me go ahead and quit this and run our command line.

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‫Press enter and it's successfully completed.

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‫What it did, is that it actually uploaded code to s3.

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‫It says successfully packaged artifacts and

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‫wrote output template to the file

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‫gen/template-generated file.

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‫It says I need to execute the following command

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‫to now deploy my code.

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‫By the way, we could have run sam and package, the command.

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‫It would have been exactly the same.

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‫If sam is just a shorthand for aws cloudformation

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‫when you use the package commands.

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‫Okay, so we have the first thing done.

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‫Let's look at this template-generated file just so

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‫we can have a good look at it.

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‫It looks just the same except now the CodeUri

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‫is now referencing s3.

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‫It turns out that my code was uploaded into s3 and

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‫this CodeUri right here was automatically updated

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‫to reference that s3 bucket and

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‫that file that was updated.

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‫This was the little nice thing done

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‫by cloudformation package.

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‫Obviously, you can do way more

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‫but this is just a little taster.

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‫Now let's go ahead and deploy and before that maybe

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‫we should check in our bucket.

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‫Indeed, yes, a file was uploaded.

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‫Now we are going to deploy our template.

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‫It says you should run this command,

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‫aws cloudformation deploy, and then the template file is,

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‫and you'll need the whole path.

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‫I can just use gen/template-generated and the stack name

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‫is going to be hello-world-sam.

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‫That sounds about right.

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‫I'm going to go ahead and run this command.

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‫This will, basically, create a changeset.

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‫It's waiting right now for the changeset to be created.

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‫When it's ready it's going to do the changesets.

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‫Here it says the changeset's generation has failed.

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‫The reason is that it requires a CAPABILITY_IAM.

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‫This is the annoying thing when you

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‫do run this package command.

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‫It doesn't necessarily give you the right answer

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‫and the right commands.

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‫You actually need to add a capability, flagged right here.

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‫Here I am going to add capabilities and then I will

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‫just copy this CAPABILITY_IAM because we are

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‫generating an IAM role.

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‫I will run this command again and now it's waiting

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‫for the changeset to be created.

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‫This time everything should be created just fine.

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‫Now the stack is in create/update state.

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‫Let's go to our cloudformation.

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‫Let's go here and we can go to services, cloudformation,

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‫and let's make sure I'm in the right region.

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‫I'm in the Paris region.

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‫This is where I configured my CLI to work.

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‫Here, as we can see, the hello-world-sam

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‫is in create in progress.

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‫Automatically this cloudformation stack

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‫was being created for me.

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‫Now I just need to wait for the create to happen.

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‫The create function has completed, as we can see.

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‫If you look at the resources that were created,

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‫as we can see, my helloworldpython Lambda function

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‫was created, but also a

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‫helloworldpython3 IAM role was created.

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‫We had both a Lambda function and an IAM role

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‫that was created for us.

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‫We could look at the events.

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‫I don't know where I'm getting this error.

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‫We could look at the events to see what happened over time.

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‫Now if we go to Lambda.

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‫We'll just type Lambda right here.

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‫We should be able to see our function

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‫that was deployed here, this hello-world-sam

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‫and it is managed by sam

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‫and we get a generated name by a cloudformation.

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‫If we look at the function code, as we expect,

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‫it is the code we had in our local environment

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‫which is returning as Hello World.

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‫We could, obviously, go ahead and test that function.

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‫Click on create, testevent, and now click on create,

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‫and now click on test and our function

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‫is really invoked and says Hello World.

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‫This was very basic but overall,

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‫we've just shown how we could write code on our computer.

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‫How with two command lines only,

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‫upload this directly to cloudformation,

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‫and cloudformation to create the Lambda function for us.

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‫Obviously, sam is way more powerful, so the next lecture

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‫we're going to see how we can update this app

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‫to do more things for us.

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‫See you in the next lecture.