Supported language runtimes and base images

Base images are composed of an operating system stack and language runtime:

  • A stack is made up of a Linux distribution version and system packages, such as OpenSSL and curl.
  • A language runtime is the specific version of the programming language used by your application.

Cloud Run supports multiple language runtimes, each of which is available through container base images provided by Google Cloud's buildpacks. Language runtimes are supported only as long as they are supported by their respective open source communities.

It is the developer's responsibility to upgrade services to newer language runtimes before it reaches end of support. Refer to the Cloud Run runtime lifecycle for details.

The Cloud Run lifecycle policy does not apply to containers built outside of Cloud Run.

Using language runtimes

Cloud Run language runtimes are used for the following:

Security and maintenance updates

Security and maintenance updates are available for generally available language runtimes. You can apply these updates automatically or manually depending on how you configure automatic security updates. Automatic security updates are enabled by default when deploying functions to Cloud Run.

How to obtain base images

Base images are hosted in every region where Artifact Registry is available.

There are three methods for specifying a base image:

  • RUNTIME_ID: will give you the base image for the specified language using its default stack. The base image will be taken from a repository in the same REGION where your service is deployed. We recommend you specify the RUNTIME_ID for most cases.
  • STACK/RUNTIME_ID: an alias for the full base image path. The base image will be taken from a repository in the same REGION where your service is deployed. Use this option if you need a specific system package in the stack.
  • REGION-docker.pkg.dev/serverless-runtimes/STACK/runtimes/RUNTIME_ID: the full base image path. Use this option if you want full control over the specific base image and the region where its downloaded from.

For the three methods for specifying a base image, replace:

  • REGION with the preferred region, for example us-central1
  • STACK with the preferred operating system stack, for example google-22-full
  • RUNTIME_ID with the language runtime ID used by your function, for example python310

For example, to reference the full base image path for the latest Node.js 20 base image using the google-22-full stack, hosted in us-central1, use the following URL:

us-central1-docker.pkg.dev/serverless-runtimes/google-22-full/runtimes/nodejs22

Node.js

Runtime Runtime ID Stacks Runtime base image
Node.js 22 nodejs22
  • google-22 (default)
  • google-22-full
    		•
  • google-22/nodejs22
  • google-22-full/nodejs22
    		•
    Node.js 20 nodejs20
  • google-22 (default)
  • google-22-full
    		•
  • google-22/nodejs20
  • google-22-full/nodejs20
    		•
    Node.js 18 nodejs18
  • google-22 (default)
  • google-22-full
    		•
  • google-22/nodejs18
  • google-22-full/nodejs18
    		•
    Node.js 16 nodejs16 google-18-full google-18-full/nodjes16
    Node.js 14 nodejs14 google-18-full google-18-full/nodjes14
    Node.js 12 nodejs12 google-18-full google-18-full/nodjes14
    Node.js 10 nodejs10 google-18-full google-18-full/nodjes10
    Node.js 8 nodejs8 Decommissioned Decommissioned
    Node.js 6 nodejs6 Decommissioned Decommissioned

    Python

    Runtime Runtime ID Stacks Runtime base image
    Python 3.12 python312
  • google-22 (default)
  • google-22-full
    		•
  • google-22/python312
  • google-22-full/python312
    		•
    Python 3.11 python311
  • google-22 (default)
  • google-22-full
    		•
  • google-22/python311
  • google-22-full/python311
    		•
    Python 3.10 python310
  • google-22 (default)
  • google-22-full
    		•
  • google-22/python310
  • google-22-full/python310
    		•
    Python 3.9 python39 google-18-full google-18-full/python39
    Python 3.8 python38 google-18-full google-18-full/python38
    Python 3.7 python37 google-18-full google-18-full/python37

    Go

    Runtime Runtime ID Stacks Runtime base image
    Go 1.23
    (Preview only)    		 go123
  • google-22 (default)
  • google-22-full
    		•
  • google-22/go123
  • google-22-full/go123
    		•
    Go 1.22 go122
  • google-22 (default)
  • google-22-full
    		•
  • google-22/go122
  • google-22-full/go122
    		•
    Go 1.21 go121
  • google-22 (default)
  • google-22-full
    		•
  • google-22/go121
  • google-22-full/go121
    		•
    Go 1.20 go120
  • google-22 (default)
  • google-22-full
    		•
  • google-22/go120
  • google-22-full/go120
    		•
    Go 1.19 go119
  • google-22 (default)
  • google-22-full
    		•
  • google-22/go119
  • google-22-full/go119
    		•
    Go 1.18 go118
  • google-22 (default)
  • google-22-full
    		•
  • google-22/go118
  • google-22-full/go120
    		•
    Go 1.16 go116 google-18-full google-18-full/go116
    Go 1.13 go113 google-18-full google-18-full/go113
    Go 1.11 go111 Decommissioned Decommissioned

    Java

    Runtime Runtime ID Stacks Runtime base image
    Java 21 java21
  • google-22 (default)
  • google-22-full
    		•
  • google-22/java21
  • google-22-full/java21
    		•
    Java 17 java17
  • google-22 (default)
  • google-22-full
    		•
  • google-22/java17
  • google-22-full/java17
    		•
    Java 11 java11 google-18 google-18/java11

    Ruby

    Runtime Runtime ID Stacks Runtime base image
    Ruby 3.3 ruby33
  • google-22 (default)
  • google-22-full
    		•
  • google-22/ruby33
  • google-22-full/ruby33
    		•
    Ruby 3.2 ruby32
  • google-22 (default)
  • google-22-full
    		•
  • google-22/ruby32
  • google-22-full/ruby32
    		•
    Ruby 3.0 ruby30 google-18-full google-18-full/ruby30
    Ruby 2.7 ruby27 google-18-full google-18-full/ruby27
    Ruby 2.6 ruby26 google-18-full google-18-full/ruby26

    PHP

    Runtime Runtime ID Stacks Runtime base image
    PHP 8.3 php83
  • google-22 (default)
  • google-22-full
    		•
  • google-22/php83
  • google-22-full/php83
    		•
    PHP 8.2 php82
  • google-22 (default)
  • google-22-full
    		•
  • google-22/php82
  • google-22-full/php82
    		•
    PHP 8.1 php81 google-18-full google-18-full/php81
    PHP 7.4 php74 google-18-full google-18-full/php74

    .NET Core

    Runtime Runtime ID Stacks Runtime base image
    .NET Core 8 dotnet8
  • google-22 (default)
  • google-22-full
    		•
  • google-22/dotnet8
  • google-22-full/dotnet8
    		•
    .NET Core 6 dotnet6
  • google-22 (default)
  • google-22-full
    		•
  • google-22/dotnet6
  • google-22-full/dotnet6
    		•
    .NET Core 3 dotnet3 google-18-full google-18-full/dotnet3