generic.dockerfile.best-practice.avoid-dnf-update.avoid-dnf-update

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Packages in base images should be up-to-date, removing the need for 'dnf update'. If packages are out-of-date, consider contacting the base image maintainer.

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Defintion

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rules:
  - id: avoid-dnf-update
    severity: INFO
    languages:
      - generic
    message: Packages in base images should be up-to-date, removing the need for
      'dnf update'. If packages are out-of-date, consider contacting the base
      image maintainer.
    metadata:
      source-rule-url: https://github.com/hadolint/hadolint/wiki/DL3039
      references:
        - https://github.com/hadolint/hadolint/wiki/DL3039
      category: best-practice
      technology:
        - dockerfile
      license: Commons Clause License Condition v1.0[LGPL-2.1-only]
    paths:
      include:
        - "*dockerfile*"
        - "*Dockerfile*"
    pattern: dnf update

Examples

avoid-dnf-update.dockerfile

# cf. https://github.com/hadolint/hadolint/wiki/DL3039

FROM centos

# ruleid: avoid-dnf-update
RUN dnf update \
    && dnf install foo-1.0 \
    && dnf clean all

# ok: avoid-dnf-update
RUN dnf install foo=1.0: