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---
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sidebar_position: 3
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slug: /programming/cloudformation
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---
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# Infra provisioning
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## Integrating with AWS Cloudformation
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@ -59,8 +54,8 @@ The idea here is to follow best practices in [<u>S3 buckets</u>](https://docs.aw
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The [<u>template</u>](https://docs.aws.amazon.com/fr_fr/AWSCloudFormation/latest/UserGuide/quickref-s3.html#scenario-s3-bucket-website) has far more outputs than necessary, as we just want to retrieve the bucket name:
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import Tabs from '@theme/Tabs';
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import TabItem from '@theme/TabItem';
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import Tabs from "@theme/Tabs";
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import TabItem from "@theme/TabItem";
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<Tabs
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defaultValue="nv"
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@ -174,10 +169,7 @@ import TabItem from '@theme/TabItem';
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"Outputs": {
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"Name": {
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"Value": {
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"Fn::GetAtt": [
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"S3Bucket",
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"Arn"
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]
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"Fn::GetAtt": ["S3Bucket", "Arn"]
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},
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"Description": "Name S3 Bucket"
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}
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@ -188,15 +180,15 @@ import TabItem from '@theme/TabItem';
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</TabItem>
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</Tabs>
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2. Some *"Pro tips"*
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2. Some _"Pro tips"_
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Double-checks at the template level can be done with manual uploads on Cloudformation's web interface or by executing the below command locally:
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```bash
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aws cloudformation validate-template --template-body file://template.json
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```
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> PS: The *"Full Base Template"* tab contains the base template used for the following parts of the guide
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> PS: The _"Full Base Template"_ tab contains the base template used for the following parts of the guide
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### JSON / YAML to Cue conversion
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@ -320,7 +312,9 @@ data: """
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</Tabs>
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###### 2. Retrieve the Unmarshalled JSON
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Then, still in the same folder, query the `point` value to retrieve the Unmarshalled result of `data`:
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<Tabs
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defaultValue="sc"
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values={[
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@ -418,40 +412,39 @@ This Cue version of the JSON template is going to be integrated inside our provi
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With the Cloudformation template now finished, tested and converted in Cue. We can now enter the last part of our guide: piping everything together inside our personal plan.
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Before continuing, don't forget to reset your `main.cue` plan to it's *Setup* form:
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Before continuing, don't forget to reset your `main.cue` plan to it's _Setup_ form:
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```cue
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-- ~/infra-provisioning/.dagger/env/s3-provisioning/plan/main.cue --
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package main
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```
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### Cloudformation relay
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As our plan relies on [<u>Cloudformation's relay</u>](https://dagger.io/aws/cloudformation), let's dissect the expected inputs by gradually incorporating them in our plan.
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| Name | Type | Description |
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| ------------- |:-------------: |:-------------: |
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|*config.region* | `string` |AWS region |
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|*config.accessKey* | `dagger.#Secret` |AWS access key |
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|*config.secretKey* | `dagger.#Secret` |AWS secret key |
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|*source* | `string` |Source is the Cloudformation template (JSON/YAML string) |
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|*stackName* | `string` |Stackname is the cloudformation stack |
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|*onFailure* | `*"DO_NOTHING" \| "ROLLBACK" \| "DELETE"` |Behavior when failure to create/update the Stack |
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|*timeout* | `*10 \| \>=0 & int` |Timeout for waiting for the stack to be created/updated (in minutes) |
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|*neverUpdate* | `*false \| bool` |Never update the stack if already exists |
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| ------------------ | :---------------------------------------: | :------------------------------------------------------------------: |
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| _config.region_ | `string` | AWS region |
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| _config.accessKey_ | `dagger.#Secret` | AWS access key |
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| _config.secretKey_ | `dagger.#Secret` | AWS secret key |
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| _source_ | `string` | Source is the Cloudformation template (JSON/YAML string) |
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| _stackName_ | `string` | Stackname is the cloudformation stack |
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| _onFailure_ | `*"DO_NOTHING" \| "ROLLBACK" \| "DELETE"` | Behavior when failure to create/update the Stack |
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| _timeout_ | `*10 \| \>=0 & int` | Timeout for waiting for the stack to be created/updated (in minutes) |
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| _neverUpdate_ | `*false \| bool` | Never update the stack if already exists |
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1. General insights
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As seen before in the documentation, values starting with `*` are default values. However, as a plan developer, we may face the need to add default values to inputs from relays that don't have one : Cue gives you this flexibility (cf. `config` value detailed below).
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>WARNING: All inputs without a default option have to be filled for a proper execution of the relay. In our case:
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> WARNING: All inputs without a default option have to be filled for a proper execution of the relay. In our case:
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>
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>* *config.region*
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>* *config.accessKey*
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>* *config.secretKey*
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>* *source*
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>* *stackName*
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> - _config.region_
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> - _config.accessKey_
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> - _config.secretKey_
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> - _source_
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> - _stackName_
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2. The config value
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@ -515,7 +508,7 @@ awsConfig: aws.#Config & { // Assign an aws.#Config definition to a field named
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</TabItem>
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</Tabs>
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*Pro tips: In order to check wether it worked or not, these two commands might help*
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_Pro tips: In order to check wether it worked or not, these two commands might help_
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<Tabs
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defaultValue="fc"
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@ -897,4 +890,3 @@ The name of the provisioned S3 instance lies in the `cfnStack.outputs.Name` outp
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PS: This plan could be further extended with the AWS S3 example : it could not only provision an infrastructure but also easily deploy on it.
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PS1: As it could make a nice first exercise for you, this won't be detailed here. However, we're interested in your imagination : let us know your implementations :-)
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Andrea Luzzardi
GitHub