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Expo Application Services
API Reference

Build server infrastructure

Learn about the current build server infrastructure when using EAS.


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This document describes the current build infrastructure as of June 27, 2022. It is likely to change over time, and this document will be updated.

Worker IP addresses

Here is the up-to-date list of worker IP addresses.

Configuring build environment

Images for each platform have one specific version of Node.js, yarn, CocoaPods, Xcode, Ruby, Fastlane, and so on. You can override some of the versions in eas.json. If there is no dedicated configuration option you're looking for, you can use npm hooks to install or update any system dependencies with apt-get or brew. Please take into account that those customizations are applied during the build and will increase your build times.

When selecting an image for the build you can use the full name provided below or one of the aliases: default, latest.

  • The use of a specific name guarantees the consistent environment with only minor updates.
  • default alias will be assigned to the environment that most closely resembles the configuration used for Expo SDK development.
  • latest alias will be assigned to the image with the most up to date versions of the software.
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Note: If you do not provide image in eas.json, your build will use default image. However, in some cases, we select a more appropriate image based on the Expo SDK version or React Native version. You can check what image is used for a build in the "Spin up build environment" build logs section.

Android build server configurations

Android workers run on virtual machines in an isolated environment. Every build gets its own dedicated VM instance.

  • Build resources:

  • npm cache deployed with Kubernetes

  • Maven cache deployed with Kubernetes

  • Global Gradle configuration in ~/.gradle/gradle.properties:

    ~/.gradle/gradle.properties
    org.gradle.jvmargs=-Xmx14g -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
    org.gradle.parallel=true
    org.gradle.configureondemand=true
    org.gradle.daemon=false
    
  • Global npm configuration in ~/.npmrc:

    ~/.npmrc
    registry=http://npm-cache-service.worker-infra-production.svc.cluster.local:4873
    
  • Global Yarn configuration in ~/.yarnrc.yml:

    ~/.yarnrc.yml
    unsafeHttpWhitelist:
      - '*'
    npmRegistryServer: 'http://npm-cache-service.worker-infra-production.svc.cluster.local:4873'
    enableImmutableInstalls: false
    

Android server images

ubuntu-22.04-jdk-11-ndk-r21e (alias latest)

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Details
  • Docker image: ubuntu:jammy-20220531
  • NDK 21.4.7075529
  • Node.js 16.18.1
  • Yarn 1.22.17
  • pnpm 7.0.0
  • npm 8.19.2
  • Java 11

ubuntu-22.04-jdk-8-ndk-r21e

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Details
  • Docker image: ubuntu:jammy-20220531
  • NDK 21.4.7075529
  • Node.js 16.18.1
  • Yarn 1.22.17
  • pnpm 7.0.0
  • npm 8.19.2
  • Java 8

ubuntu-20.04-jdk-11-ndk-r21e (alias default)

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Details
  • Docker image: ubuntu:focal-20210921
  • NDK 21.4.7075529
  • Node.js 16.18.1
  • Yarn 1.22.17
  • pnpm 7.0.0
  • npm 8.19.2
  • Java 11

ubuntu-20.04-jdk-8-ndk-r21e

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Details
  • Docker image: ubuntu:focal-20210921
  • NDK 21.4.7075529
  • Node.js 16.18.1
  • Yarn 1.22.17
  • pnpm 7.0.0
  • npm 8.19.2
  • Java 8

ubuntu-18.04-jdk-11-ndk-r19c

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Details
  • Docker image: ubuntu:bionic-20210930
  • NDK 19.2.5345600
  • Node.js 16.18.1
  • Yarn 1.22.17
  • pnpm 7.0.0
  • npm 8.19.2
  • Java 11

ubuntu-18.04-jdk-8-ndk-r19c

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Details
  • Docker image: ubuntu:bionic-20210930
  • NDK 19.2.5345600
  • Node.js 16.18.1
  • Yarn 1.22.17
  • pnpm 7.0.0
  • npm 8.19.2
  • Java 8

iOS build server configurations

iOS worker VMs run on Mac Mini 8.1 hosts in an isolated environment. Every build gets its own fresh macOS VM:

  • Hardware:

    • Intel: Intel(R) Core(TM) i7-8700B CPU (6 cores/12 threads), 64 GB RAM
    • M1: 3.2GHz 8-Core M1 (4 performance and 4 efficiency cores), 16 GB RAM [2020]
  • Build resources:

    • intel-medium: 3 cores, 12 GB RAM, 2 builder VMs per host
    • m1-medium: 2 cores, 8 GB RAM, 2 builder VMs per host
  • npm cache

  • CocoaPods cache

  • cocoapods-nexus-plugin

  • Global npm configuration in ~/.npmrc:

    ~/.npmrc
    registry=http://10.254.24.9:4873
    
  • Global Yarn configuration in ~/.yarnrc.yml:

    ~/.yarnrc.yml
    unsafeHttpWhitelist:
      - '*'
    npmRegistryServer: 'registry=http://10.254.24.9:4873'
    enableImmutableInstalls: false
    

iOS server images

macos-monterey-12.6-xcode-14.1 (alias latest)

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Details
  • macOS Monterey 12.6
  • Xcode 14.1 (14B47b)
  • Node.js 16.18.1
  • Yarn 1.22.17
  • pnpm 7.15.0
  • npm 8.19.2
  • fastlane 2.210.1
  • CocoaPods 1.11.3
  • Ruby 2.7

macos-monterey-12.6-xcode-14.0 (alias default)

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Details
  • macOS Monterey 12.6
  • Xcode 14.0 (14A309)
  • Node.js 16.18.1
  • Yarn 1.22.17
  • pnpm 7.11.0
  • npm 8.19.2
  • fastlane 2.210.0
  • CocoaPods 1.11.3
  • Ruby 2.7

macos-monterey-12.4-xcode-13.4

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Details
  • macOS Monterey 12.4
  • Xcode 13.4 (13F17a)
  • Node.js 16.18.1
  • Yarn 1.22.17
  • pnpm 7.0.0
  • npm 8.19.2
  • fastlane 2.205.2
  • CocoaPods 1.11.3
  • Ruby 2.7

macos-big-sur-11.4-xcode-13.0

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Details
  • macOS Big Sur 11.4
  • Xcode 13.0 (13A233)
  • Node.js 16.18.1
  • Yarn 1.22.17
  • pnpm 7.0.0
  • npm 8.19.2
  • fastlane 2.185.1
  • CocoaPods 1.10.1
  • Ruby 2.7

macos-monterey-12.3-xcode-13.3 (deprecated)

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Details
  • macOS Monterey 12.3.1
  • Xcode 13.3.1 (13E500a)
  • Node.js 16.18.1
  • Yarn 1.22.17
  • pnpm 7.0.0
  • npm 8.19.2
  • fastlane 2.205.2
  • CocoaPods 1.11.3
  • Ruby 2.7

macos-monterey-12.1-xcode-13.2 (deprecated)

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Details
  • macOS Monterey 12.1
  • Xcode 13.2.1 (13C100)
  • Node.js 16.18.1
  • Yarn 1.22.17
  • pnpm 7.0.0
  • npm 8.19.2
  • fastlane 2.201.0
  • CocoaPods 1.11.2
  • Ruby 2.7

macos-big-sur-11.4-xcode-12.5 (deprecated, not available for M1 workers)

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Details
  • macOS Big Sur 11.4
  • Xcode 12.5 (12E5244e)
  • Node.js 16.18.1
  • Yarn 1.22.17
  • pnpm 7.0.0
  • npm 8.19.2
  • fastlane 2.185.1
  • CocoaPods 1.10.1
  • Ruby 2.7
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