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The Minimus image gallery uses the following system of organization:
  • Images - Refers to the image type, as in Nginx, Golang, PHP, Redis, etc.
  • Image lines - Refers to the release branch. Minimus image lines match the upstream’s maintained release lines.
  • Image versions - Refers to the exact version number or release number. Image versions are always placed under the appropriate image line.
Image Line And Version Pn

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About image lines

Minimus maintains release lines that are being actively supported by their upstream projects. To be considered actively supported, the line must be receiving bug reports and security issues and putting out version updates.
Refer to the upstream project for end-of-life (EOL) dates and information on deprecated versions.
Most projects maintain at least 2 lines, often named. For example:
  • nginx has a mainline and a stable line (ref).
  • MySQL has an innovation or latest line and two long term support lines - lts and the line previously tagged as lts (ref).
  • Postgres maintains 5 release lines, but they are not named (ref).
  • Python maintains 2 active support lines and sometimes another release-candidate - rc (ref).
You can expect the named tags to mark the appropriate images in Minimus, for example, mainline, stable, and lts. Minimus images with named tags

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About image versions

Minimus follows the release schedule of the upstream projects. Every time a new version is released, Minimus will cut an image of the new version. The version numbers are identical to the upstream project and will be shown in the relevant image line in the Minimus gallery. Learn more about the Minimus new version SLA The image version typically follows semantic versioning conventions in X.Y.Z format (ref). For example, for the nginx image, the latest mainline version is 1.29.3 and the latest stable version is 1.28.0 (on Dec 4, 2025).

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Internal updates of an image version

Minimus maintains the most recent version in each image line on a daily basis. Image versions that are actively receiving updates will be rebuilt whenever there are internal packages to update. These internal updates will not affect the image version, but will be recorded in the Digest History tab of the Image Version Card. Learn more about the digest history You can also use the unique Timestamp Tag to identify the exact build you are using for an image version. The unique timestamp tag is a human-readable alternative to the image digest developed by Minimus. Learn more about timestamp tags An image line will often contain several image versions, listed chronologically. It is recommended to update to the most recent version as soon as possible to benefit from the potential vulnerability reduction.

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Multi-architecture images

Minimus images are built to support multiple CPU architectures (amd64 and arm64) and can run on different hardware platforms without requiring separate images. When you run the docker pull command to get an image from the Minimus gallery, it will automatically pull the correct architecture for your system.

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Selecting the right image line

If you’re not already committed to a particular image version, you may be asking yourself which image line you should use? Minimus can help you decide based on your requirements:
  • As a general recommendation, unless you have constraints such as app compatibility issues, you should always use the latest version. This ensures that you are using the most up-to-date version and can benefit from security updates more completely.
  • If your testing cycle is relatively longer, you may be forced to use a previous version line. You should still opt for the most recent version within the line to benefit from daily security updates.
  • If you have constraints that require you to use an older image version, note that the version will not receive security updates. Minimus images are minimal and hardened from the start and so accumulate vulnerabilities more slowly, thereby staying more secure for a relatively longer period of time.
  • Visit the Minimus gallery to view a current vulnerability report for any image version. The report provides an up-to-date status on the vulnerabilities detected in the version. Learn more about image vulnerability reports