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Nginx version number rules details

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The version number of Nginx follows a specific format: main version number, minor version number, and revision number. Each number has a specific meaning: main version for incompatible changes, minor version for new features, and revision number for bug fixes. LTS versions are supported for at least two years and are usually even-numbered. It is recommended to use LTS versions in production environments and when building containers. It is important to update LTS versions promptly when new updates are available.

Version Number Rules Details#

Nginx's version number is officially defined as:

Major Version.Minor Version.Patch Version

Where the version numbers do not have strict meanings or limitations, so compatibility issues need to be confirmed when upgrading versions.

The meaning of each version number is as follows:

  • Major Version: Increase the major version when there are incompatible changes.
  • Minor Version: Increase the minor version when new backward-compatible features are added.
  • Patch Version: Increase the patch version when backward-compatible issues are fixed.

For example:

  1. The current LTS version is 1.22.2, indicating two patch versions.

  2. The current mainline version is 1.23.4, with a total of four patch versions this year.

LTS Version Naming Rules#

Nginx's LTS versions generally have a support period of two years or more. In general, LTS versions have even version numbers. Versions like 1.16.x, 1.18.x, 1.20.x, 1.22.x are recognized by the official as LTS versions.

Notes on nginx Version Usage#

  • LTS versions are recommended for production environments.
  • LTS versions are also recommended for container builds internally.
  • LTS versions should be updated promptly when updates are available.
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