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Requirements
This page includes useful information on the supported Operating Systems as well as the hardware requirements that are needed to install and use GitLab.
Operating Systems
Supported Linux distributions
- Ubuntu (16.04/18.04)
- Debian (8/9/10)
- CentOS (6/7/8)
- openSUSE (Leap 15.1/Enterprise Server 12.2)
- Red Hat Enterprise Linux (please use the CentOS packages and instructions)
- Scientific Linux (please use the CentOS packages and instructions)
- Oracle Linux (please use the CentOS packages and instructions)
For the installation options, see the main installation page.
Unsupported Linux distributions and Unix-like operating systems
- Arch Linux
- Fedora
- FreeBSD
- Gentoo
- macOS
Installation of GitLab on these operating systems is possible, but not supported. Please see the installation from source guide and the installation guides for more information.
Microsoft Windows
GitLab is developed for Linux-based operating systems. It does not run on Microsoft Windows, and we have no plans to support it in the near future. For the latest development status view this issue. Please consider using a virtual machine to run GitLab.
Software requirements
Ruby versions
GitLab requires Ruby (MRI) 2.6. Beginning in GitLab 12.2, we no longer support Ruby 2.5 and lower.
You must use the standard MRI implementation of Ruby. We love JRuby and Rubinius, but GitLab needs several Gems that have native extensions.
Go versions
The minimum required Go version is 1.13.
Git versions
GitLab 11.11 and higher only supports Git 2.24.x and newer, and dropped support for older versions.
Node.js versions
Beginning in GitLab 12.9, we only support node.js 10.13.0 or higher, and we have dropped support for node.js 8. (node.js 6 support was dropped in GitLab 11.8)
We recommend Node 12.x, as it's faster.
GitLab uses webpack to compile frontend assets, which requires a minimum version of Node.js 10.13.0.
You can check which version you're running with node -v. If you're running
a version older than v10.13.0, you need to update it to a newer version. You
can find instructions to install from community maintained packages or compile
from source at the Node.js website.
Redis versions
GitLab requires Redis 5.0+. Beginning in GitLab 13.0, lower versions are not supported.
Hardware requirements
Storage
The necessary hard drive space largely depends on the size of the repositories you want to store in GitLab but as a rule of thumb you should have at least as much free space as all your repositories combined take up.
If you want to be flexible about growing your hard drive space in the future consider mounting it using logical volume management (LVM) so you can add more hard drives when you need them.
Apart from a local hard drive you can also mount a volume that supports the network file system (NFS) protocol. This volume might be located on a file server, a network attached storage (NAS) device, a storage area network (SAN) or on an Amazon Web Services (AWS) Elastic Block Store (EBS) volume.
If you have enough RAM and a recent CPU the speed of GitLab is mainly limited by hard drive seek times. Having a fast drive (7200 RPM and up) or a solid state drive (SSD) will improve the responsiveness of GitLab.
NOTE: Note: Since file system performance may affect GitLab's overall performance, we don't recommend using AWS EFS for storage.
CPU
This is the recommended minimum hardware for a handful of example GitLab user base sizes. Your exact needs may be more, depending on your workload. Your workload is influenced by factors such as - but not limited to - how active your users are, how much automation you use, mirroring, and repository/change size.
- 1 core supports up to 100 users but the application can be a bit slower due to having all workers and background jobs running on the same core
- 2 cores is the recommended minimum number of cores and supports up to 100 users
- 4 cores support up to 500 users
- 8 cores support up to 1,000 users
- 32 cores support up to 5,000 users
- More users? Consult the reference architectures page
Memory
This is the recommended minimum hardware for a handful of example GitLab user base sizes. Your exact needs may be more, depending on your workload. Your workload is influenced by factors such as - but not limited to - how active your users are, how much automation you use, mirroring, and the size of repositories as well as changes/commits.
You need at least 8GB of addressable memory (RAM + swap) to install and use GitLab! The operating system and any other running applications will also be using memory so keep in mind that you need at least 4GB available before running GitLab. With less memory GitLab will give strange errors during the reconfigure run and 500 errors during usage.
- 4GB RAM + 4GB swap supports up to 100 users but it will be very slow
- 8GB RAM is the recommended minimum memory size for all installations and supports up to 100 users
- 16GB RAM supports up to 500 users
- 32GB RAM supports up to 1,000 users
- 128GB RAM supports up to 5,000 users
- More users? Consult the reference architectures page
We recommend having at least 2GB of swap on your server, even if you currently have
enough available RAM. Having swap will help reduce the chance of errors occurring
if your available memory changes. We also recommend configuring the kernel's swappiness setting
to a low value like 10 to make the most of your RAM while still having the swap
available when needed.
Our Memory Team is actively working to reduce the memory requirement.
NOTE: Note: The 25 workers of Sidekiq will show up as separate processes in your process overview (such as top or htop). However, they share the same RAM allocation, as Sidekiq is a multi-threaded application. See the section below about Unicorn workers for information about how many you need for those.
Database
PostgreSQL is the only supported database, which is bundled with the Omnibus GitLab package. You can also use an external PostgreSQL database. Support for MySQL was removed in GitLab 12.1. Existing users using GitLab with MySQL/MariaDB are advised to migrate to PostgreSQL before upgrading.
PostgreSQL Requirements
The server running PostgreSQL should have at least 5-10 GB of storage available, though the exact requirements depend on the number of users.
We highly recommend users to use the minimum PostgreSQL versions specified below as these are the versions used for development and testing.
| GitLab version | Minimum PostgreSQL version |
|---|---|
| 10.0 | 9.6 |
| 12.10 | 11 |
| 13.0 | 11 |
You must also ensure the pg_trgm extension is loaded into every
GitLab database. This extension can be enabled using a PostgreSQL super user.
On some systems you may need to install an additional package (for example,
postgresql-contrib) for this extension to become available.
NOTE: Note: Support for PostgreSQL 9.6 and 10 has been removed in GitLab 13.0 so that GitLab can benefit from PostgreSQL 11 improvements, such as partitioning. For the schedule of transitioning to PostgreSQL 12, see the related epic.
Additional requirements for GitLab Geo
If you're using GitLab Geo:
- We strongly recommend running Omnibus-managed instances as they are actively developed and tested. We aim to be compatible with most external (not managed by Omnibus) databases (for example, AWS Relational Database Service (RDS)) but we don't guarantee compatibility.
- You must also ensure the
postgres_fdwextension is loaded into every GitLab database. This extension can be enabled using a PostgreSQL super user.
Unicorn Workers
For most instances we recommend using: (CPU cores * 1.5) + 1 = Unicorn workers. For example a node with 4 cores would have 7 Unicorn workers.
For all machines that have 2GB and up we recommend a minimum of three Unicorn workers. If you have a 1GB machine we recommend to configure only two Unicorn workers to prevent excessive swapping.
As long as you have enough available CPU and memory capacity, it's okay to increase the number of Unicorn workers and this will usually help to reduce the response time of the applications and increase the ability to handle parallel requests.
To change the Unicorn workers when you have the Omnibus package (which defaults to the recommendation above) please see the Unicorn settings in the Omnibus GitLab documentation.
Puma settings
The recommended settings for Puma are determined by the infrastructure on which it's running. Omnibus GitLab defaults to the recommended Puma settings. Regardless of installation method, you can tune the Puma settings.
If you're using Omnibus GitLab, see Puma settings for instructions on changing the Puma settings. If you're using the GitLab Helm chart, see the Webservice chart.
Puma workers
The recommended number of workers is calculated as the highest of the following:
2- Number of CPU cores - 1
For example a node with 4 cores should be configured with 3 Puma workers.
You can increase the number of Puma workers, providing enough CPU and memory capacity is available. A higher number of Puma workers will usually help to reduce the response time of the application and increase the ability to handle parallel requests. You must perform testing to verify the optimal settings for your infrastructure.
Puma threads
The recommended number of threads is dependent on several factors, including total memory, and use of legacy Rugged code.
- If the operating system has a maximum 2 GB of memory, the recommended number of threads is
1. A higher value will result in excess swapping, and decrease performance. - If legacy Rugged code is in use, the recommended number of threads is
1. - In all other cases, the recommended number of threads is
4. We don't recommend setting this higher, due to how Ruby MRI multi-threading works.
Redis and Sidekiq
Redis stores all user sessions and the background task queue. The storage requirements for Redis are minimal, about 25kB per user. Sidekiq processes the background jobs with a multithreaded process. This process starts with the entire Rails stack (200MB+) but it can grow over time due to memory leaks. On a very active server (10,000 active users) the Sidekiq process can use 1GB+ of memory.
Prometheus and its exporters
As of Omnibus GitLab 9.0, Prometheus and its related exporters are enabled by default, to enable easy and in depth monitoring of GitLab. Approximately 200MB of memory will be consumed by these processes, with default settings.
If you would like to disable Prometheus and it's exporters or read more information about it, check the Prometheus documentation.
GitLab Runner
We strongly advise against installing GitLab Runner on the same machine you plan to install GitLab on. Depending on how you decide to configure GitLab Runner and what tools you use to exercise your application in the CI environment, GitLab Runner can consume significant amount of available memory.
Memory consumption calculations, that are available above, won't be valid if you decide to run GitLab Runner and the GitLab Rails application on the same machine.
It's also not safe to install everything on a single machine, because of the security reasons, especially when you plan to use shell executor with GitLab Runner.
We recommend using a separate machine for each GitLab Runner, if you plan to use the CI features. The GitLab Runner server requirements depend on:
- The type of executor you configured on GitLab Runner.
- Resources required to run build jobs.
- Job concurrency settings.
Since the nature of the jobs varies for each use case, you will need to experiment by adjusting the job concurrency to get the optimum setting.
For reference, GitLab.com's auto-scaling shared runner is configured so that a single job will run in a single instance with:
- 1vCPU.
- 3.75GB of RAM.
Supported web browsers
CAUTION: Caution: With GitLab 13.0 (May 2020) we have removed official support for Internet Explorer 11. With the release of GitLab 13.4 (September 2020) we will remove all code that supports Internet Explorer 11. You can provide feedback on this issue or via your usual support channels.
GitLab supports the following web browsers:
For the listed web browsers, GitLab supports:
- The current and previous major versions of browsers except Internet Explorer.
- The current minor version of a supported major version.
NOTE: Note: We don't support running GitLab with JavaScript disabled in the browser and have no plans of supporting that in the future because we have features such as Issue Boards which require JavaScript extensively.