Amazon Web Services (AWS)

Gitpod is a flexible tool that works with many cloud providers, including AWS. The following page describes ways that you can integrate Gitpod and AWS.

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OIDC Integration with AWS

Gitpod can connect workspaces to AWS using Gitpod support for OpenID Connect, which allows workspaces to retrieve AWS access credentials in the workspace without the use of static credentials, or environment variables. In the following flow, an IAM role is created in an external AWS account, through usage of the gp command in Gitpod. The generated JWT token includes claims about the workspace and it’s owner, and is exchanged with AWS for an STS token. That STS token is related to an IAM role and will inherit any access that is given to that IAM role. Modelling the access controls is the responsibility of the AWS account owner/administrator.

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Step 1: Create an “AWS Identity Provider” resource

AWS Identity Providers allow you to manage user identities outside of AWS, instead of creating IAM users in your AWS account and giving these external identities (e.g. Gitpod workspaces) permissions to use AWS resources in your account.

To connect Gitpod to AWS you need to create an “IAM identity provider” to establish a trust relationship between your AWS account and Gitpod. Gitpod supports OpenID Connect (OIDC), so please follow AWS’s guide here to create an OIDC identity provider.

• Configure the URL of the identity provider to: https://services.<gitpod-installation>/idp
  • For an Enterprise installation running under companyname.gitpod.cloud, the URL is: https://services.companyname.gitpod.cloud/idp.
• The client ID / Audience should be set to: sts.amazonaws.com

Read more:

• [AWS docs] Identity providers and federation
• [AWS docs] Creating OpenID Connect (OIDC) identity providers

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Step 2: Create an AWS role with a trust policy

Now that your AWS account is setup to trust Gitpod, you need to create an AWS IAM role that can be assumed by the Gitpod workspace user. You can restrict who has access to the assumed role based on claims in your Gitpod workspace JWT token.

Example claims in the OIDC JWT

{
	"iss": "https://services.gitpod.io/idp",
	"aud": ["sts.amazonaws.com"],
	"azp": "sts.amazonaws.com",
	"c_hash": "zSrbWN_X9Wx52-wxjgdX5w",
	"exp": 1682344961,
	"iat": 1682341361,
	"auth_time": 1682341361,
	"sub": "https://github.com/gitpod-io/gitpod",
	"name": "kumquat"
}

To adjust the IAM role trust policy to restrict which workspaces can assume the role, you can define conditions keys using the name of the OIDC provider (created in step 1, e.g. gitpod.io) followed by the claim (:aud, :azp, :amr, sub). There are some examples below that show how this works. Read more about these OIDC condition keys here.

Here are some examples restricting who can assume the role depending on the sub key contents, in this case, the repository from which a Gitpod Workspace was created.

This particular example, shows that only users that create a Gitpod Workspace from https://github.com/gitpod-io/my-application can assume this role:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Principal": {
                "Federated": "arn:aws:iam::981341800645:oidc-provider/services.gitpod.io/idp"
            },
            "Action": "sts:AssumeRoleWithWebIdentity",
            "Condition": {
                "StringEquals": {
                    "services.gitpod.io/idp:aud": "sts.amazonaws.com"
                    "services.gitpod.io/idp:sub": "https://github.com/gitpod-io/my-application"
                }
            }
        }
    ]
}

Example IAM assume role trust policy to grant access only to the repo gitpod-io/my-application

The same thing happens in the following example, the only difference is that the condition changed to StringLike to consider all repositories from the https://github.com/gitpod-io/ organization. The same thing could be done to consider all branches from a respository, example: https://github.com/gitpod-io/my-application/*.

{
	"Version": "2012-10-17",
	"Statement": [
		{
			"Effect": "Allow",
			"Principal": {
				"Federated": "arn:aws:iam::981241700645:oidc-provider/services.gitpod.io/idp"
			},
			"Action": "sts:AssumeRoleWithWebIdentity",
			"Condition": {
				"StringEquals": {
					"services.gitpod.io/idp:aud": "sts.amazonaws.com"
				},
				"StringLike": {
					"services.gitpod.io/idp:sub": "https://github.com/gitpod-io/*"
				}
			}
		}
	]
}

Example IAM assume role trust policy to grant access to any repo in the “gitpod-io” organization.

Read more:

• [AWS docs] IAM and AWS STS condition context keys
• [AWS docs] IAM String condition operators

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Step 3: Assume the AWS role to retrieve the AWS credentials

You can either call the AWS CLI assume-role command manually, or use the helper command within the gp CLI, gp idp login aws which will automatically update your AWS CLI credentials file.

The token expiry can be customized using --duration-seconds=<token-expiry-in-seconds>, this configuration option exactly matches the --duration-seconds configuration option offered by AWS CLI. The default is 3600 seconds. Note, to use a longer expiry your AWS Administrator must allow for longer sessions.

You can add the following to your gitpod.yml to login to AWS using OIDC and then fetch a secret dynamically from AWS Secrets Manager for use in your application:

Example .gitpod.yml that assumes an AWS web identity role:

tasks:
    - command: |
          gp idp login aws --role-arn <your-iam-role-arn> [--duration-seconds=<expiry-in-seconds>]
          aws secretsmanager get-secret-value --secret-id database_connection_string --region us-east-1 | jq .SecretString

Read more:

• [AWS docs] assume-role-with-web-identity

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Troubleshooting

Use gp idp token --decode --audience sts.amazonaws.com to print your workspace JWT token. Ensure that any claims against the sub match the trust policy in AWS.

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Frequently asked questions

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What AWS resources can I access with OIDC in Gitpod?

When you use OIDC in Gitpod, you get an AWS access token called an STS token. This STS token lets you access various AWS resources, like EC2 instances, EKS clusters, S3 Buckets, RDS databases, and more. In simple terms, if you’re trying to do something that you can do with AWS CLI or SDK, it will work in Gitpod, too provided you setup grant the required access through your IAM role.

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How fine-grained is the AWS access control in Gitpod?

When you connect to AWS through OIDC in Gitpod, you get an STS token that represents an AWS IAM role. This IAM role has specific policies or rules that define what can and can’t be accessed in AWS. The level of access you have in Gitpod to AWS resources depends on the policies you attach to the assumed IAM role.