Seed runs your builds inside a virtual machine and it’ll use a build image based on the Lambda runtime of your service. Below is a list of all the images in use:

Active Images

Deprecated Images

Changing the Build Image

By default, Seed will automatically select a build image for your service based on the runtime you have set in your serverless.yml. However, Seed will not automatically update this when your runtime is updated. This is done to ensure that any scripts in your build spec are not affected by the build image change.

If you want to update the build image that a service in your app is using, head over to the service’s settings.

Build image option in service settings

Note that, if a service has not been deployed yet, Seed will not have picked a build image.

You can also check which image was used for a specific build, by heading over to the logs for that build.

Build image info in build logs

Build Images

Below are the build images that are used and the types of services they are used for. A build image is chosen based on the Lambda runtime of the service.

General Purpose v3.0

Lambda runtimes: Node.js 12.x, Python 3.8, Go 1.x, Ruby 2.7, Java 11, .NET Core 3.1

OS: Ubuntu 18.04

Includes Version
Node.js 12
Python 3.8
Ruby 2.7
Go 1.14
.NET Core 3.1
Java 11
PHP 7.4
NPM 6.14
YARN 1.22
PIP 19.3
Docker* 19.03
Docker Compose* 1.24

*Docker and Docker Compose need to be enabled.

General Purpose v1.1

Lambda runtimes: Node.js 10.x, Python 3.7, Java 8

OS: Ubuntu 18.04

Includes Version
Node.js 10
Python 3.7
Ruby 2.6
Go 1.13
.NET Core 3.1
Java 11
PHP 7.3
NPM 6.14
YARN 1.22
PIP 19.3
Docker* 19.03
Docker Compose* 1.24

*Docker and Docker Compose need to be enabled.

Python 3.6

Lambda runtime: Python 3.6

OS: Debian 9

Includes Version
Node.js 8.15
Python 3.6
NPM 6.1.0
YARN 1.12.3
PIP 9.0.1

Python 2.7

Lambda runtime: Python 2.7

OS: Debian 9

Includes Version
Node.js 8.15
Python 2.7
NPM 6.1.0
YARN 1.12.3
PIP 9.0.1

Ruby 2.5

Lambda runtime: Ruby 2.5

OS: Debian 9

Includes Version
Node.js 8.10
Ruby 2.5
NPM 6.1.0
YARN 1.12.3

Deprecated Build Images

The following build images are no longer available for new services but might still be in use for existing services. If your services are still using the ones below, contact us to have them upgraded.

General Purpose v2.0

Upgrade to: General Purpose v3.0

OS: Ubuntu 18.04

Includes Version
Node.js 12
Python 3.8
Ruby 2.6
Go 1.13
.NET Core 3.0
Java 11
PHP 7.3
NPM 6.13.4
YARN 1.12.3
PIP 19.3.1
Docker* 19.03
Docker Compose* 1.24

*Docker and Docker Compose need to be enabled.

General Purpose v1.0

Upgrade to: General Purpose v1.1

OS: Ubuntu 18.04

Includes Version
Node.js 10
Python 3.7
Ruby 2.6
Go 1.13
.NET Core 2.2
Java 11
PHP 7.3
NPM 6.13.4
YARN 1.12.3
PIP 19.3.1
Docker* 18.09
Docker Compose* 1.24

*Docker and Docker Compose need to be enabled.

Python 3.7

Upgrade to: General Purpose v1.0

Lambda runtime: Python 3.7

OS: Debian 9

Includes Version
Node.js 8.15
Python 3.7
NPM 6.1.0
YARN 1.12.3
PIP 18.1

.NET Core 2.1

Upgrade to: General Purpose v1.0

Lambda runtime: .NET Core 2.1

OS: Debian 9

Includes Version
Node.js 8.10
.NET Core 2.1
NPM 6.1.0
YARN 1.12.3