---
title: Build server infrastructure
sidebar_title: Server infrastructure
maxHeadingDepth: 4
description: Learn about the current build server infrastructure when using EAS.
---

import { Collapsible } from '~/ui/components/Collapsible';
import al from '@mdx-js/react';
import { HardwareList, BuildResourceList } from '~/ui/components/utils/infrastructure';

> This document was last updated on **May 5, 2023**.

## Builder IP addresses

Here is the [up-to-date list of builder IP addresses](https://expo.dev/eas-build-worker-ips.txt).

## 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](/build/eas-json).
If there is no dedicated configuration option you're looking for, you can use [npm hooks](npm-hooks) to install or update any system dependencies with `apt-get` or `brew`. Please consider 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.

> **info** **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 builders run on virtual machines in an isolated environment. Every build gets its own dedicated VM instance.

- Hardware:

  <HardwareList platform="android" />

- [npm cache deployed with Kubernetes](caching/#javascript-dependencies)
- [Maven cache deployed with Kubernetes](caching/#android-dependencies)
- Global Gradle configuration in **~/.gradle/gradle.properties**:

  ```ini ~/.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**:

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

- Global Yarn configuration in **~/.yarnrc.yml**:

  ```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`)

<Collapsible summary="Details">

- Docker image: `ubuntu:jammy-20220531`
- NDK 21.4.7075529
- Node.js 16.18.1
- Yarn 1.22.17
- pnpm 8.7.5
- npm 8.19.2
- Java 11

</Collapsible>

#### `ubuntu-22.04-jdk-8-ndk-r21e`

<Collapsible summary="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

</Collapsible>

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

<Collapsible summary="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

</Collapsible>

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

<Collapsible summary="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

</Collapsible>

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

<Collapsible summary="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

</Collapsible>

#### `ubuntu-18.04-jdk-8-ndk-r19c`

<Collapsible summary="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

</Collapsible>

## iOS build server configurations

iOS builder VMs run on Mac Mini hosts in an isolated environment. Every build gets its own fresh macOS VM.
[Learn more about it here](eas-json/#resourceclass-2)

- Hardware:

  <HardwareList platform="ios" />

- Build resources:

  <BuildResourceList platform="ios" />

- [npm cache](caching/#javascript-dependencies)
- [CocoaPods cache](caching/#ios-dependencies)
- [`cocoapods-nexus-plugin`](https://github.com/expo/eas-build/tree/main/packages/cocoapods-nexus-plugin)
- Global npm configuration in **~/.npmrc**:

  ```ini ~/.npmrc
  registry=http://10.254.24.9:4873
  ```

- Global Yarn configuration in **~/.yarnrc.yml**:

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

### iOS server images

#### `macos-ventura-13.4-xcode-14.3.1` (`latest` for Apple silicon builders, only available for Apple silicon builders)

<Collapsible summary="Details">

- macOS Ventrua 13.4
- Xcode 14.3.1 (14E300c)
- Node.js 16.18.1
- Yarn 1.22.17
- pnpm 8.6.5
- npm 8.1.2
- fastlane 2.213.0
- CocoaPods 1.12.1
- Ruby 2.7

</Collapsible>

#### `macos-ventura-13.3-xcode-14.3` (`default` for Apple silicon builders, only available for Apple silicon builders)

<Collapsible summary="Details">

- macOS Ventrua 13.3
- Xcode 14.3 (14E222b)
- Node.js 16.18.1
- Yarn 1.22.17
- pnpm 8.2.0
- npm 8.1.2
- fastlane 2.212.2
- CocoaPods 1.12.0
- Ruby 2.7

</Collapsible>

#### `macos-monterey-12.6-xcode-14.2` (`latest` for Intel builders)

<Collapsible summary="Details">

- macOS Monterey 12.6
- Xcode 14.2 (14C18)
- Node.js 16.18.1
- Yarn 1.22.17
- pnpm 7.27.0
- npm 8.19.2
- fastlane 2.211.0
- CocoaPods 1.11.3
- Ruby 2.7

</Collapsible>

#### `macos-monterey-12.6-xcode-14.1` (`default` for Intel builders)

<Collapsible summary="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

</Collapsible>

#### `macos-monterey-12.6-xcode-14.0`

<Collapsible summary="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

</Collapsible>

#### `macos-monterey-12.4-xcode-13.4`

<Collapsible summary="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

</Collapsible>

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

<Collapsible summary="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

</Collapsible>

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

<Collapsible summary="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

</Collapsible>

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

<Collapsible summary="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

</Collapsible>

#### `macos-big-sur-11.4-xcode-12.5` (deprecated, only available for Intel builders)

<Collapsible summary="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

</Collapsible>