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deploying-to-aws.md

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Most of our production TerriaJS-based sites are hosted on Amazon Web Services (AWS). This page describes how to use the automated AWS deployment mechanism available in TerriaMap. There are, of course, countless other ways to deploy to AWS.

Prerequisites

awscli

Deploying requires a recent version of awscli. It's recommended to install and maintain this using python's pip as the Homebrew and Ubuntu packages are quite old.

pip install awscli

AWS credentials

You must have an awscli configuration profile (in ~/.aws/config) with a name that matches awsProfile in package.json. e.g.

[profile terria]
aws_access_key_id=YOUR_ACCESS_KEY
aws_secret_access_key=YOUR_SECRET_ACCESS_KEY

package.json

Various parameters controlling AWS deployment are specified in package.json. They are:

  • awsProfile - The AWS profile to use (see AWS credentials above) when interacting with AWS.
  • awsS3PackagesPath - The S3 path to which to copy the deployment .tar.gz.
  • awsRegion - The AWS region in which to create resources.
  • awsEc2InstanceType - The type of EC2 instance to use.
  • awsEc2ImageId - The ID of the EC2 image to use.
  • awsKeyName - The name of a key that may be used to SSH to the EC2 instance.
  • awsS3ServerConfigOverridePath - The path to a file on S3 containing any overrides to devserverconfig.json.
  • awsS3ClientConfigOverridePath - The path to a file on S3 containing any overrides to wwwroot/config.json.

You can customize these settings by changing package.json, or by using npm config to override the setting locally, for example;

npm config set terriajs-map:awsProfile myprofilename

stack.json

You will need to modify deploy/aws/stack.json to match your environment. In particular, you will need to change:

  • Parameters.HostedZoneName.Default: This is the domain name where a DNS record for the deployment will be created.
  • SSLCertificateId in Resources.ElasticLoadBalancer.Listeners: The SSL certificate to use for HTTPS connections to the deployment. If you don't have a certificate or don't want to support HTTPS, remove the entire listener with "LoadBalancerPort": "443".
  • terriamap-sharing in Resources.S3Role.Properties.Policies.PolicyDocument.Statement: This authorizes the EC2 instances to access an S3 bucket to be used to store JSON blobs for the sharing feature. You will want to create a bucket for this purpose and add its name here.

Getting ready to deploy

Prior to deploying, please tag the release with the date, e.g.

git tag -a 2016-05-17 -m '2016-05-17 release'

This is used to name the CloudFormation stack, so it's important to get it right. Before deploying, double check that the tag is correct with:

git describe

Also run:

git status

and make sure your working directory is clean and that all changes are pushed to the remote origin repository. This is generally the only time that you want to commit changes to package-lock.json if you've updated any npm packages.

Once you're happy with your release, remember to push the tag.

git push origin 2016-05-17

Deploy

Deployment is initiated via npm scripts. A full production deployment may be initiated with:

yarn deploy

Once the stack starts up, it will be available at terriajs-map-2016-05-17.terria.io, where terriajs-map is the name of the project in package.json and 2016-05-17 is the output of git describe (that's why you should tag before starting a deployment).

The following npm scripts are available:

  • deploy - Removes the node_modules directory, runs npm install, and launches the deploy-without-reinstall script.
  • deploy-without-reinstall - Runs gulp clean (which removes the wwwroot/build directory) and gulp release, and then launches the deploy-current script.
  • deploy-current - Gets the two configuration override files specified in package.json from S3, builds a package (.tar.gz), uploads it to S3, and spins up a CloudFormation stack.

The CloudFormation stack has the following AWS resources:

  • Elastic Load Balancer
  • EC2 Security Group
  • Auto Scaling Group
  • Launch Configurartion
  • Route 53 Record Set

Instances in the Auto Scaling group are bootstrapped using the supplied user-data file.

The process of starting a new stack takes about 5 minutes but it can take a further 15 minutes for the DNS to propagate.

Test stack

Each stack is automatically assigned its own URL based on the name of the stack. e.g.

https://terriajs-map-2016-05-17.terria.io/

If you don't see your release immediately, don't panic! It can take 10 minutes or so to appear.

Update DNS alias

Once you're satisfied the release is working, change the staging environment DNS record to point to the new stack using the Route 53 Console.

map.terria.io -> terriajs-map-2016-05-17.terria.io

Troubleshooting

The default Mac OS tar command causes trouble. You'll need to replace it with gtar, eg. using Homebrew.

After releasing

Make sure you delete the old CloudFormation stacks for the previous version of the app. Otherwise they'll keep running (and costing money!).