Build server infrastructure

This document describes the current build infrastructure as of May 13, 2022. It is likely to change over time, and this document will be updated.

Configuring build environment

Images for each platform have one specific version of Node, yarn, CocoaPods, Xcode, Ruby, Fastlane, and so on. You can override some of the versions in eas.json. If there's 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 Kubernetes in an isolated environment
- Every build gets its own container running on a dedicated Kubernetes node
- Build resources: 4 CPU, 12 GB RAM
NPM cache deployed with Kubernetes. Learn more
Maven cache deployed with Kubernetes. Learn more

Global Gradle configuration in ~/.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

~/.npmrc

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

~/.yarnrc.yml

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

Image `ubuntu-20.04-jdk-11-ndk-r21e` (alias `latest`)

Details

Docker image: ubuntu:focal-20210921
NDK 21.4.7075529
Node.js 16.13.2
Yarn 1.22.17
npm 8.1.2
Java 11

Image `ubuntu-20.04-jdk-8-ndk-r21e`

Details

Docker image: ubuntu:focal-20210921
NDK 21.4.7075529
Node.js 16.13.2
Yarn 1.22.17
npm 8.1.2
Java 8

Image `ubuntu-18.04-jdk-11-ndk-r19c`

Details

Docker image: ubuntu:bionic-20210930
NDK 19.2.5345600
Node.js 16.13.2
Yarn 1.22.17
npm 8.1.2
Java 11

Image `ubuntu-18.04-jdk-8-ndk-r19c` (alias `default`)

Details

Docker image: ubuntu:bionic-20210930
NDK 19.2.5345600
Node.js 16.13.2
Yarn 1.22.17
npm 8.1.2
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(R) Core(TM) i7-8700B CPU (6 cores/12 threads), 64 GB RAM
- Build resource limits: 3 cores, 12 GB RAM
npm cache. Learn more

~/.npmrc

registry=http://10.254.24.8:4873

~/.yarnrc.yml

unsafeHttpWhitelist:
  - "*"
npmRegistryServer: "registry=http://10.254.24.8:4873"
enableImmutableInstalls: false

Image `macos-monterey-12.3-xcode-13.3` (alias `default`, `latest`)

Details

macOS Monterey 12.3.1
Xcode 13.3.1 (13E500a)
Node.js 16.13.2
Yarn 1.22.17
pnpm 7.0.0
npm 8.1.2
fastlane 2.205.2
CocoaPods 1.11.3
Ruby 2.7

Image `macos-monterey-12.1-xcode-13.2`

Details

macOS Monterey 12.1
Xcode 13.2.1 (13C100)
Node.js 16.13.2
Yarn 1.22.17
pnpm 7.0.0
npm 8.1.2
fastlane 2.201.0
CocoaPods 1.11.2
Ruby 2.7

Image `macos-big-sur-11.4-xcode-13.0`

Details

macOS Big Sur 11.4
Xcode 13.0 (13A233)
Node.js 16.13.2
Yarn 1.22.17
pnpm 7.0.0
npm 8.1.2
fastlane 2.185.1
CocoaPods 1.10.1
Ruby 2.7

Image `macos-big-sur-11.4-xcode-12.5`

Details

macOS Big Sur 11.4
Xcode 12.5 (12E5244e)
Node.js 16.13.2
Yarn 1.22.17
pnpm 7.0.0
npm 8.1.2
fastlane 2.185.1
CocoaPods 1.10.1
Ruby 2.7