Build Environment Overview

What This Guide Covers #

This guide provides an overview on the different environments in which Travis CI can run your builds, and why you might want to pick one over another.

Virtualization environments #

Each build runs in one of the following virtual environments.

Linux #

A sudo enabled, full virtual machine per build, that runs Linux, either Ubuntu Xenial 16.04, Ubuntu Trusty 14.04, or Ubuntu Precise 12.04

OS X #

An OS X environment for Objective-C and other OS X specific projects

Windows #

A Windows environment running Windows Server, version 1803.

Virtualisation Environment vs Operating System #

The following table summarizes the differences across virtual environments and operating systems:

  Ubuntu Linux (Xenial , Trusty, Precise) OS X Windows
Name Ubuntu OS X Windows
Status Current Current Early release
Infrastructure Virtual machine on GCE Virtual machine Virtual machine on GCE
.travis.yml dist: xenial or dist: trusty or dist: precise os: osx os: windows
Allows sudo Yes Yes No
Approx boot time 20-50s 60-90s 60-120s
File system EXT4 HFS+ NTFS
Operating system Ubuntu Linux OS X Windows Server 2016
Memory 7.5 GB 4 GB 8 GB
Cores 2 2 2
IPv4 network IPv4 is available IPv4 is available IPv4 is available
IPv6 network IPv6 is not available IPv6 is not available IPv6 is not available
Available disk space approx 18GB approx 41GB approx 19 GB

Available disk space is approximate and depends on the base image and language selection of your project. The best way to find out what is available on your specific image is to run df -h as part of your build script.

What infrastructure is my environment running on? #

Usually, knowing the virtualization environment characteristics from the table above is sufficient.

But, if you do need more detail, you have one of these two questions:

For a finished build #

To see what infrastructure a finished build ran on, look at the hostname at the top of the build log:

Infrastructure shown in hostname

if it contains:

  • gce → the build ran in a virtual machine on Google Compute Engine.
  • wjb → the build ran on macOS.
  • 1803-containers → the build ran on Windows.

For a particular .travis.yml configuration #

  • Our default infrastructure is an Ubuntu Linux (os: linux) virtual machine running on Google Compute Engine. You can specify which version of Ubuntu using the dist key.

  • Using os: osx, setting a version of Xcode using osx_image:, or using a macOS specific language such as language: objective-c routes your build to macOS infrastructure.

  • Using os: windows routes your build to Windows infrastructure.

Between middle of October 2018 and end December 2018 the default infrastructure your builds runs on will depend on a few different factors while we consolidate everything onto virtual machines running on Google Compute Engine.

Deprecated Virtualization Environments #

Historically, Travis CI has provided the following virtualization environments.

If you’re trying to use sudo: false or dist: precise keys in your travis.yml, we recommend you switch to our current Xenial Linux infrastructure.