Build server infrastructure

Learn about the current build server infrastructure when using EAS.

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.

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:

  • medium: 4 CPU, 16 GB RAM (n2-standard-4 Google Cloud machine type)
  • large: 8 CPU, 32 GB RAM (n2-standard-8 Google Cloud machine type)

• npm cache deployed with Kubernetes

• Maven cache deployed with Kubernetes

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

  ~/.gradle/gradle.properties

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  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

  Copy

  registry=http://npm-cache-service.worker-infra-production.svc.cluster.local:4873
  

• Global Yarn configuration in ~/.yarnrc.yml:

  ~/.yarnrc.yml

  Copy

  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)

ubuntu-22.04-jdk-8-ndk-r21e

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

ubuntu-20.04-jdk-8-ndk-r21e

ubuntu-18.04-jdk-11-ndk-r19c

ubuntu-18.04-jdk-8-ndk-r19c

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

  Copy

  registry=http://10.254.24.9:4873
  

• Global Yarn configuration in ~/.yarnrc.yml:

  ~/.yarnrc.yml

  Copy

  unsafeHttpWhitelist:
    - '*'
  npmRegistryServer: 'registry=http://10.254.24.9:4873'
  enableImmutableInstalls: false
  

iOS server images

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

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

macos-monterey-12.4-xcode-13.4

macos-big-sur-11.4-xcode-13.0

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

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

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