SolidStartSite

The SolidStartSite construct is a higher level CDK construct that makes it easy to create an SolidStart app. It provides a simple way to build and deploy the app to AWS:

The client assets are deployed to an S3 Bucket, and served out from a CloudFront CDN for fast content delivery.
The app server is deployed to Lambda. You can deploy to Lambda@Edge instead if the edge flag is enabled. Read more about Single region vs Edge.
It enables you to configure custom domains for the website URL.
It also enable you to automatically set the environment variables for your SolidStart app directly from the outputs in your SST app.
It provides a simple interface to grant permissions for your app to access AWS resources.

Quick Start

If you are creating a new SolidStart app, create a my-solid-app folder at the root of your SST app.
Then run create-solid from the my-solid-app folder.
```
npx create-solid@latest
```
And make sure to enable Server Side Rendering.
After the SolidStart app is created, your SST app structure should look like:
```
my-sst-app
├─ sst.config.ts
├─ services
├─ stacks
└─ my-solid-app     <-- new SolidStart app
   ├─ src
   ├─ public
   └─ vite.config.ts
```
Continue to step 3.

Alternatively, if you have an existing SolidStart app, move the app to the root of your SST app. Your SST app structure should look like:

my-sst-app
├─ sst.config.ts
├─ services
├─ stacks
└─ my-solid-app     <-- your SolidStart app
   ├─ src
   ├─ public
   └─ vite.config.ts

Let's set up the solid-start-sst adapter for your SolidStart app. The adapter will transform the SSR functions to a format that can be deployed to AWS. To do that, make sure your vite.config.ts looks like the following.
```
import solid from "solid-start/vite";
import aws from "solid-start-sst";
import { defineConfig } from "vite";

export default defineConfig({
  plugins: [solid({ adapter: aws() })],
});
```
And add the solid-start-sst dependency to your SolidStart app's package.json.
```
npm install --save-dev solid-start-sst
```
info
If you are deploying the SolidStartSite in the edge mode, use the edge adapter instead.
- plugins: [solid({ adapter: aws() })], + plugins: [solid({ adapter: aws({ edge: true }) })],
Also add the sst bind command to your SolidStart app's package.json. sst bind enables you to automatically set the environment variables for your SolidStart app directly from the outputs in your SST app.
```
  "scripts": {
-   "dev": "solid-start dev",
+   "dev": "sst bind solid-start dev",
    "build": "solid-start build",
    "start": "solid-start start"
  },
```

Add the SolidStartSite construct to an existing stack in your SST app. You can also create a new stack for the app.

import { SolidStartSite, StackContext } as sst from "sst/constructs";

export default function MyStack({ stack }: StackContext) {

  // ... existing constructs

  // Create the SolidStart site
  const site = new SolidStartSite(stack, "Site", {
    path: "my-solid-app/",
  });

  // Add the site's URL to stack output
  stack.addOutputs({
    URL: site.url || "localhost",
  });
}

When you are building your SST app, SolidStartSite will invoke npm build inside the SolidStart app directory. Make sure path is pointing to the your SolidStart app.

We also added the site's URL to the stack output. After the deploy succeeds, the URL will be printed out in the terminal.

Working locally

To work on your SolidStart app locally with SST:

Start SST in your project root.
```
npx sst dev
```
Then start your SolidStart app. This should run sst bind remix dev.
```
npm run dev
```

note

When running sst dev, SST does not deploy your SolidStart app. It's meant to be run locally.

Single region vs edge

There are two ways you can deploy the SolidStart app to your AWS account.

By default, the SolidStart app server is deployed to a single region defined in your sst.config.ts or passed in via the --region flag. Alternatively, you can choose to deploy to the edge. When deployed to the edge, loaders/actions are running on edge location that is physically closer to the end user. In this case, the app server is deployed to AWS Lambda@Edge.

You can enable edge like this:

const site = new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  edge: true,
});

Note that, in the case you have a centralized database, Edge locations are often far away from your database. If you are quering your database in your loaders/actions, you might experience much longer latency when deployed to the edge.

info

We recommend you to deploy to a single region when unsure.

Custom domains

You can configure the website with a custom domain hosted either on Route 53 or externally.

const site = new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  customDomain: "my-app.com",
});

Note that visitors to the http:// URL will be redirected to the https:// URL.

You can also configure an alias domain to point to the main domain. For example, to setup www.my-app.com redirecting to my-app.com:

const site = new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  customDomain: {
    domainName: "my-app.com",
    domainAlias: "www.my-app.com",
  },
});

Environment variables

The SolidStartSite construct allows you to set the environment variables in your SolidStart app based on outputs from other constructs in your SST app. So you don't have to hard code the config from your backend. Let's look at how.

To expose environment variables to your SolidStart application you should utilise the SolidStartSite construct environment configuration property rather than an .env file within your SolidStart application root.

Imagine you have an API created using the Api construct, and you want to fetch data from the API. You'd pass the API's endpoint to your SolidStart app.

const api = new Api(stack, "Api", {
  // ...
});

new SolidStartSite(stack, "Site", {
  path: "path/to/site",
  environment: {
    API_URL: api.url,
  },
});

Then you can access the API's URL in your server code:

const data = await db(import.meta.env.API_URL);

Note that, in SolidStart, only environment variables prefixed with VITE_ are available in your browser code. Read more about using environment variables.

For example, if you want to access the API's URL in your frontend js code, you'd name it VITE_API_URL:

new SolidStartSite(stack, "Site", {
  path: "path/to/site",
  environment: {
    VITE_API_URL: api.url,
  },
});

Let's take look at what is happening behind the scene.

While deploying

On sst deploy, the SolidStart app server is deployed to a Lambda function, and the SolidStartSite's environment values are set as Lambda function environment variables. In this case, process.env.API_URL will be available at runtime.

If you enabled the edge option, the SolidStart app server will instead get deployed to a Lambda@Edge function. We have an issue here, AWS Lambda@Edge does not support runtime environment variables. To get around this limitation, we insert a snippet to the top of your app server:

const environment = "{{ _SST_FUNCTION_ENVIRONMENT_ }}";
process.env = { ...process.env, ...environment };

And at deploy time, after the referenced resources have been created, the API in this case, a CloudFormation custom resource will update the app server's code and replace the placeholder {{ _SST_FUNCTION_ENVIRONMENT_ }} with the actual value:

const environment = {
  API_URL: "https://ioe7hbv67f.execute-api.us-east-1.amazonaws.com",
};
process.env = { ...process.env, ...environment };

This will make process.env.API_URL available at runtime.

While developing

To use these values while developing, run sst dev to start the Live Lambda Development environment.

npx sst dev

Then in your SolidStart app to reference these variables, add the sst bind command.

package.json
"scripts": {
  "dev": "sst bind solid-start dev",
  "build": "solid-start build",
  "start": "solid-start start"
},

Now you can start your SolidStart app as usual and it'll have the environment variables from your SST app.

npm run dev

There are a couple of things happening behind the scenes here:

The sst dev command generates a file with the values specified by the SolidStartSite construct's environment prop.
The sst bind CLI will traverse up the directories to look for the root of your SST app.
It'll then find the file that's generated in step 1.
It'll load these as environment variables before running the start command.

note

sst bind only works if the SolidStart app is located inside the SST app or inside one of its subdirectories. For example:

/
  sst.config.ts
  my-solid-app/

Using AWS services

Since the SolidStartSite construct deploys your SolidStart app to your AWS account, it's very convenient to access other resources in your AWS account. SolidStartSite provides a simple way to grant permissions to access specific AWS resources.

Imagine you have a DynamoDB table created using the Table construct, and you want to fetch data from the Table.

const table = new Table(stack, "Table", {
  // ...
});

const site = new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  environment: {
    TABLE_NAME: table.tableName,
  },
});

site.attachPermissions([table]);

Note that we are also passing the table name into the environment, so the SolidStart server code can fetch the value process.env.TABLE_NAME when calling the DynamoDB API to query the table.

Warming

Server functions may experience performance issues due to Lambda cold starts. SST helps mitigate this by creating an EventBridge scheduled rule to periodically invoke the server function.

new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  warm: 20,
});

Setting warm to 20 keeps 20 server function instances active, invoking them every 5 minutes.

Note that warming is currently supported only in regional mode.

Cost

There are three components to the cost:

EventBridge scheduler: $0.00864

Requests cost — 8,640 invocations per month x $1/million = $0.00864

Warmer function: $0.145728288

Requests cost — 8,640 invocations per month x $0.2/million = $0.001728
Duration cost — 8,640 invocations per month x 1GB memory x 1s duration x $0.0000166667/GB-second = $0.144000288

Server function: $0.0161280288 per warmed instance

Requests cost — 8,640 invocations per month x $0.2/million = $0.001728
Duration cost — 8,640 invocations per month x 1GB memory x 100ms duration x $0.0000166667/GB-second = $0.0144000288

For example, keeping 50 instances of the server function warm will cost approximately $0.96 per month

$0.00864 + $0.145728288 + $0.0161280288 x 50 = $0.960769728

This cost estimate is based on the us-east-1 region pricing and does not consider any free tier benefits.

Examples

Configuring custom domains

You can configure the website with a custom domain hosted either on Route 53 or externally.

Using the basic config (Route 53 domains)

new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  customDomain: "my-app.com",
});

Redirect www to non-www (Route 53 domains)

new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  customDomain: {
    domainName: "my-app.com",
    domainAlias: "www.my-app.com",
  },
});

Configuring domains across stages (Route 53 domains)

new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  customDomain: {
    domainName:
      scope.stage === "prod" ? "my-app.com" : `${scope.stage}.my-app.com`,
    domainAlias: scope.stage === "prod" ? "www.my-app.com" : undefined,
  },
});

Configuring alternate domain names (Route 53 domains)

You can specify additional domain names for the site url. Note that the certificate for these names will not be automatically generated, so the certificate option must be specified. Also note that you need to manually create the Route 53 records for the alternate domain names.

import * as acm from "aws-cdk-lib/aws-certificatemanager";
import * as route53 from "aws-cdk-lib/aws-route53";
import * as route53Targets from "aws-cdk-lib/aws-route53-targets";

// Look up hosted zone
const hostedZone = route53.HostedZone.fromLookup(stack, "HostedZone", {
  domainName: "domain.com",
});

// Create a certificate with alternate domain names
const certificate = new acm.DnsValidatedCertificate(stack, "Certificate", {
  domainName: "foo.domain.com",
  hostedZone,
  region: "us-east-1",
  subjectAlternativeNames: ["bar.domain.com"],
});

// Create site
const site = new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  customDomain: {
    domainName: "foo.domain.com",
    alternateNames: ["bar.domain.com"],
    cdk: {
      hostedZone,
      certificate,
    },
  },
});

// Create A and AAAA records for the alternate domain names
const recordProps = {
  recordName: "bar.domain.com",
  zone: hostedZone,
  target: route53.RecordTarget.fromAlias(
    new route53Targets.CloudFrontTarget(site.cdk.distribution)
  ),
};
new route53.ARecord(stack, "AlternateARecord", recordProps);
new route53.AaaaRecord(stack, "AlternateAAAARecord", recordProps);

Importing an existing certificate (Route 53 domains)

import { Certificate } from "aws-cdk-lib/aws-certificatemanager";

new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  customDomain: {
    domainName: "my-app.com",
    cdk: {
      certificate: Certificate.fromCertificateArn(stack, "MyCert", certArn),
    },
  },
});

Note that, the certificate needs be created in the us-east-1(N. Virginia) region as required by AWS CloudFront.

Specifying a hosted zone (Route 53 domains)

If you have multiple hosted zones for a given domain, you can choose the one you want to use to configure the domain.

import { HostedZone } from "aws-cdk-lib/aws-route53";

new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  customDomain: {
    domainName: "my-app.com",
    cdk: {
      hostedZone: HostedZone.fromHostedZoneAttributes(stack, "MyZone", {
        hostedZoneId,
        zoneName,
      }),
    },
  },
});

Configuring externally hosted domain

import { Certificate } from "aws-cdk-lib/aws-certificatemanager";

new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  cutomDomain: {
    isExternalDomain: true,
    domainName: "my-app.com",
    cdk: {
      certificate: Certificate.fromCertificateArn(stack, "MyCert", certArn),
    },
  },
});

Note that the certificate needs be created in the us-east-1(N. Virginia) region as required by AWS CloudFront, and validated. After the Distribution has been created, create a CNAME DNS record for your domain name with the Distribution's URL as the value. Here are more details on configuring SSL Certificate on externally hosted domains.

Also note that you can also migrate externally hosted domains to Route 53 by following this guide.

Configuring server function

new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  timeout: "5 seconds",
  memorySize: "2048 MB",
});

Advanced examples

Configuring VPC

Note that VPC is only supported when deploying to a single region.

import { Vpc, SubnetType } as ec2 from "aws-cdk-lib/aws-ec2";

// Create a VPC
const vpc = new Vpc(stack, "myVPC");

// Alternatively use an existing VPC
const vpc = Vpc.fromLookup(stack, "myVPC", { ... });

new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  cdk: {
    server: {
      vpc,
      vpcSubnets: {
        subnetType: SubnetType.PRIVATE_WITH_NAT,
      }
    }
  }
});

Using an existing S3 Bucket

import * as s3 from "aws-cdk-lib/aws-s3";

new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  cdk: {
    bucket: s3.Bucket.fromBucketName(stack, "Bucket", "my-bucket"),
  },
});

Reusing CloudFront cache policies

CloudFront has a limit of 20 cache policies per AWS account. This is a hard limit, and cannot be increased. If you plan to deploy multiple SolidStart sites, you can have the constructs share the same cache policies by reusing them across sites.

import * as cdk from "aws-cdk-lib";
import * as cf from "aws-cdk-lib/aws-cloudfront";

const serverCachePolicy = new cf.CachePolicy(stack, "ServerCache", {
  queryStringBehavior: cf.CacheQueryStringBehavior.all(),
  headerBehavior: cf.CacheHeaderBehavior.none(),
  cookieBehavior: cf.CacheCookieBehavior.all(),
  defaultTtl: cdk.Duration.days(0),
  maxTtl: cdk.Duration.days(365),
  minTtl: cdk.Duration.days(0),
  enableAcceptEncodingBrotli: true,
  enableAcceptEncodingGzip: true,
});

new SolidStartSite(stack, "Site1", {
  path: "my-solid-app/",
  cdk: {
    serverCachePolicy,
  },
});

new SolidStartSite(stack, "Site2", {
  path: "another-solid-start-app/",
  cdk: {
    serverCachePolicy,
  },
});

Protecting server function behind API Gateway

When deployed to a single region, instead of sending the request to the server function directly, you can send the request to API Gateway and have API Gateway proxy the request to the server function. With this setup, you can use features like authorizers to protect the server function.

import { Fn } from "aws-cdk-lib";
import * as origins from "aws-cdk-lib/aws-cloudfront-origins";

// Create an API Gateway API
const api = new Api(stack, "Api");

// Configure the CloudFront distribution to route requests to the API endpoint
const site = new SolidStartSite(stack, "Site", {
  path: "my-solid-app/",
  cdk: {
    distribution: {
      defaultBehavior: {
        origin: new origins.HttpOrigin(Fn.parseDomainName(api.url)),
      },
    },
  },
});

// Configure the API Gateway to route all incoming requests to the site's SSR function
// Note: The site is not deployed when using the `sst dev` command
if (!app.local) {
  api.addRoutes(stack, {
    "ANY /{proxy+}": {
      type: "function",
      cdk: {
        function: site.cdk.function,
      },
    },
  });
}

Constructor

new SolidStartSite(scope, id, rawProps)

Parameters

scope Construct
id string
rawProps SsrSiteProps

Properties

An instance of SolidStartSite has the following properties.

customDomainUrl

Type : undefined | string

If the custom domain is enabled, this is the URL of the website with the custom domain.

id

Type : string

url

Type : undefined | string

The CloudFront URL of the website.

cdk

Type : undefined |

cdk.bucket

Type : Bucket

cdk.certificate

Type : undefined | ICertificate

cdk.distribution

Type : IDistribution

cdk.function

Type : undefined | IFunction | Function

cdk.hostedZone

Type : undefined | IHostedZone

The internally created CDK resources.

Methods

An instance of SolidStartSite has the following methods.

attachPermissions

attachPermissions(permissions)

Parameters

permissions Permissions

Attaches the given list of permissions to allow the server side rendering framework to access other AWS resources.

site.attachPermissions(["sns"]);

getConstructMetadata

getConstructMetadata()

Quick Start​

info

Working locally​

note

Single region vs edge​

info

Custom domains​

Environment variables​

While deploying​

While developing​

note

Using AWS services​

Warming​

Cost​

Examples​

Configuring custom domains​

Using the basic config (Route 53 domains)​

Redirect www to non-www (Route 53 domains)​

Configuring domains across stages (Route 53 domains)​

Configuring alternate domain names (Route 53 domains)​

Importing an existing certificate (Route 53 domains)​

Specifying a hosted zone (Route 53 domains)​

Configuring externally hosted domain​

Configuring server function​

Advanced examples​

Configuring VPC​

Using an existing S3 Bucket​

Reusing CloudFront cache policies​

Protecting server function behind API Gateway​

Constructor​

Properties​

customDomainUrl​

id​

url​

cdk​

cdk.bucket​

cdk.certificate​

cdk.distribution​

cdk.function​

cdk.hostedZone​

Methods​

attachPermissions​

getConstructMetadata​

Quick Start

Working locally

Single region vs edge

Custom domains

Environment variables

While deploying

While developing

Using AWS services

Warming

Cost

Examples

Configuring custom domains

Using the basic config (Route 53 domains)

Redirect www to non-www (Route 53 domains)

Configuring domains across stages (Route 53 domains)

Configuring alternate domain names (Route 53 domains)

Importing an existing certificate (Route 53 domains)

Specifying a hosted zone (Route 53 domains)

Configuring externally hosted domain

Configuring server function

Advanced examples

Configuring VPC

Using an existing S3 Bucket

Reusing CloudFront cache policies

Protecting server function behind API Gateway

Constructor

Properties

customDomainUrl

id

url

cdk

cdk.bucket

cdk.certificate

cdk.distribution

cdk.function

cdk.hostedZone

Methods

attachPermissions

getConstructMetadata