Skip to content
Permalink
Branch: master
Find file Copy path
Fetching contributors…
Cannot retrieve contributors at this time
255 lines (219 sloc) 9.83 KB
import * as pulumi from "@pulumi/pulumi";
import * as aws from "@pulumi/aws";
import * as fs from "fs";
import * as mime from "mime";
import * as path from "path";
// Load the Pulumi program configuration. These act as the "parameters" to the Pulumi program,
// so that different Pulumi Stacks can be brought up using the same code.
const stackConfig = new pulumi.Config("static-website");
const config = {
// pathToWebsiteContents is a relativepath to the website's contents.
pathToWebsiteContents: stackConfig.require("pathToWebsiteContents"),
// targetDomain is the domain/host to serve content at.
targetDomain: stackConfig.require("targetDomain"),
// (Optional) ACM certificate ARN for the target domain; must be in the us-east-1 region. If omitted, an ACM certificate will be created.
certificateArn: stackConfig.get("certificateArn"),
};
// contentBucket is the S3 bucket that the website's contents will be stored in.
const contentBucket = new aws.s3.Bucket("contentBucket",
{
bucket: config.targetDomain,
acl: "public-read",
// Configure S3 to serve bucket contents as a website. This way S3 will automatically convert
// requests for "foo/" to "foo/index.html".
website: {
indexDocument: "index.html",
errorDocument: "404.html",
}
});
// crawlDirectory recursive crawls the provided directory, applying the provided function
// to every file it contains. Doesn't handle cycles from symlinks.
function crawlDirectory(dir: string, f: (_: string) => void) {
const files = fs.readdirSync(dir);
for (const file of files) {
const filePath = `${dir}/${file}`;
const stat = fs.statSync(filePath);
if (stat.isDirectory()) {
crawlDirectory(filePath, f);
}
if (stat.isFile()) {
f(filePath);
}
}
}
// Sync the contents of the source directory with the S3 bucket, which will in-turn show up on the CDN.
const webContentsRootPath = path.join(process.cwd(), config.pathToWebsiteContents);
console.log("Syncing contents from local disk at", webContentsRootPath);
crawlDirectory(
webContentsRootPath,
(filePath: string) => {
const relativeFilePath = filePath.replace(webContentsRootPath + "/", "");
const contentFile = new aws.s3.BucketObject(
relativeFilePath,
{
key: relativeFilePath,
acl: "public-read",
bucket: contentBucket,
contentType: mime.getType(filePath) || undefined,
source: new pulumi.asset.FileAsset(filePath),
},
{
parent: contentBucket,
});
});
// logsBucket is an S3 bucket that will contain the CDN's request logs.
const logsBucket = new aws.s3.Bucket("requestLogs",
{
bucket: `${config.targetDomain}-logs`,
acl: "private",
});
const tenMinutes = 60 * 10;
let certificateArn: pulumi.Input<string> = config.certificateArn!;
/**
* Only provision a certificate (and related resources) if a certificateArn is _not_ provided via configuration.
*/
if (config.certificateArn === undefined) {
const eastRegion = new aws.Provider("east", {
region: "us-east-1", // Per AWS, ACM certificate must be in the us-east-1 region.
});
const certificate = new aws.acm.Certificate("certificate", {
domainName: config.targetDomain,
validationMethod: "DNS",
}, { provider: eastRegion });
const domainParts = getDomainAndSubdomain(config.targetDomain);
const hostedZoneId = aws.route53.getZone({ name: domainParts.parentDomain }).then(zone => zone.id);
/**
* Create a DNS record to prove that we _own_ the domain we're requesting a certificate for.
* See https://docs.aws.amazon.com/acm/latest/userguide/gs-acm-validate-dns.html for more info.
*/
const certificateValidationDomain = new aws.route53.Record(`${config.targetDomain}-validation`, {
name: certificate.domainValidationOptions[0].resourceRecordName,
zoneId: hostedZoneId,
type: certificate.domainValidationOptions[0].resourceRecordType,
records: [certificate.domainValidationOptions[0].resourceRecordValue],
ttl: tenMinutes,
});
/**
* This is a _special_ resource that waits for ACM to complete validation via the DNS record
* checking for a status of "ISSUED" on the certificate itself. No actual resources are
* created (or updated or deleted).
*
* See https://www.terraform.io/docs/providers/aws/r/acm_certificate_validation.html for slightly more detail
* and https://github.com/terraform-providers/terraform-provider-aws/blob/master/aws/resource_aws_acm_certificate_validation.go
* for the actual implementation.
*/
const certificateValidation = new aws.acm.CertificateValidation("certificateValidation", {
certificateArn: certificate.arn,
validationRecordFqdns: [certificateValidationDomain.fqdn],
}, { provider: eastRegion });
certificateArn = certificateValidation.certificateArn;
}
// distributionArgs configures the CloudFront distribution. Relevant documentation:
// https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/distribution-web-values-specify.html
// https://www.terraform.io/docs/providers/aws/r/cloudfront_distribution.html
const distributionArgs: aws.cloudfront.DistributionArgs = {
enabled: true,
// Alternate aliases the CloudFront distribution can be reached at, in addition to https://xxxx.cloudfront.net.
// Required if you want to access the distribution via config.targetDomain as well.
aliases: [ config.targetDomain ],
// We only specify one origin for this distribution, the S3 content bucket.
origins: [
{
originId: contentBucket.arn,
domainName: contentBucket.websiteEndpoint,
customOriginConfig: {
// Amazon S3 doesn't support HTTPS connections when using an S3 bucket configured as a website endpoint.
// https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/distribution-web-values-specify.html#DownloadDistValuesOriginProtocolPolicy
originProtocolPolicy: "http-only",
httpPort: 80,
httpsPort: 443,
originSslProtocols: ["TLSv1.2"],
},
},
],
defaultRootObject: "index.html",
// A CloudFront distribution can configure different cache behaviors based on the request path.
// Here we just specify a single, default cache behavior which is just read-only requests to S3.
defaultCacheBehavior: {
targetOriginId: contentBucket.arn,
viewerProtocolPolicy: "redirect-to-https",
allowedMethods: ["GET", "HEAD", "OPTIONS"],
cachedMethods: ["GET", "HEAD", "OPTIONS"],
forwardedValues: {
cookies: { forward: "none" },
queryString: false,
},
minTtl: 0,
defaultTtl: tenMinutes,
maxTtl: tenMinutes,
},
// "All" is the most broad distribution, and also the most expensive.
// "100" is the least broad, and also the least expensive.
priceClass: "PriceClass_100",
// You can customize error responses. When CloudFront recieves an error from the origin (e.g. S3 or some other
// web service) it can return a different error code, and return the response for a different resource.
customErrorResponses: [
{ errorCode: 404, responseCode: 404, responsePagePath: "/404.html" },
],
restrictions: {
geoRestriction: {
restrictionType: "none",
},
},
viewerCertificate: {
acmCertificateArn: certificateArn, // Per AWS, ACM certificate must be in the us-east-1 region.
sslSupportMethod: "sni-only",
},
loggingConfig: {
bucket: logsBucket.bucketDomainName,
includeCookies: false,
prefix: `${config.targetDomain}/`,
},
};
const cdn = new aws.cloudfront.Distribution("cdn", distributionArgs);
// Split a domain name into its subdomain and parent domain names.
// e.g. "www.example.com" => "www", "example.com".
function getDomainAndSubdomain(domain: string): { subdomain: string, parentDomain: string } {
const parts = domain.split(".");
if (parts.length < 2) {
throw new Error(`No TLD found on ${domain}`);
}
// No subdomain, e.g. awesome-website.com.
if (parts.length === 2) {
return { subdomain: "", parentDomain: domain };
}
const subdomain = parts[0];
parts.shift(); // Drop first element.
return {
subdomain,
// Trailing "." to canonicalize domain.
parentDomain: parts.join(".") + ".",
};
}
// Creates a new Route53 DNS record pointing the domain to the CloudFront distribution.
async function createAliasRecord(
targetDomain: string, distribution: aws.cloudfront.Distribution): Promise<aws.route53.Record> {
const domainParts = getDomainAndSubdomain(targetDomain);
const hostedZone = await aws.route53.getZone({ name: domainParts.parentDomain });
return new aws.route53.Record(
targetDomain,
{
name: domainParts.subdomain,
zoneId: hostedZone.zoneId,
type: "A",
aliases: [
{
name: distribution.domainName,
zoneId: distribution.hostedZoneId,
evaluateTargetHealth: true,
},
],
});
}
const aRecord = createAliasRecord(config.targetDomain, cdn);
// Export properties from this stack. This prints them at the end of `pulumi up` and
// makes them easier to access from the pulumi.com.
export const contentBucketUri = pulumi.interpolate `s3://${contentBucket.bucket}`;
export const contentBucketWebsiteEndpoint = contentBucket.websiteEndpoint;
export const cloudFrontDomain = cdn.domainName;
export const targetDomainEndpoint = `https://${config.targetDomain}/`;
You can’t perform that action at this time.
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session.