hadolint, A Dockerfile Linted
hadolint on EL 10 from the GitHub release, refused by Ansible's get_url unless its SHA-256 is the one in the vendor's checksums file, and re-checked by the live test, which lints a two-line Dockerfile with four things wrong and expects DL3008 among the findings and exit 1. Pinned; a newer release is a variable change. Original role, live-tested on Rocky Linux 10.
Verification
Live-testedReally deployed to a container sandbox, proven idempotent (a second run changes nothing), verified against the role’s assertions, then torn down.
Conformance
- Static validation (yamllint · ansible-lint)
Provenance
- SHA-256 checksum
- Signature (pending)
Functional
- Live-tested - applied, verified, destroyed
Last verified 2026-09-20 · podman 4.9.3 · ansible 2.21.4 · how we verify
Documentation
hadolint
hadolint hadolint on EL 10 from the vendor's release, checked against the
published SHA-256, pinned to a version, installed as root's binary
in /usr/local/bin. Original role for EL 10, live-tested with podman on
Rocky Linux 10.
No package worth the name. EL 10 carries no hadolint, and a
third-party repository is one more key to trust. This role takes the
release from github.com/hadolint/hadolint, has Ansible's get_url refuse the asset unless
its SHA-256 is the published one, and the live test checks the asset on
disk against the same published value again.
Pinned. hadolint_version is what gets installed, kept in a directory
of its own so the checksum file and the asset it names stay together. A
newer release is a variable change and a run; the same version is
changed=0.
Proven to run. The live test runs hadolint --no-color /tmp/hadolint-p/Dockerfile and expects
"DL3008" - the binary ran all the way to the point where it
needed something this host does not have.
A Dockerfile, linted. The live test writes a two-line Dockerfile
that does four things wrong (latest, an unpinned apt-get install
without -y or --no-install-recommends) and has hadolint read it:
DL3007, DL3008, DL3014 and DL3015 come back and the exit code is 1. The
checksum file names each asset with a leading * (binary mode), which
Ansible's get_url and sha256sum -c both accept.
License
Commercial - IaC Bazaar EULA. (c) IaC Bazaar.
Usage code & full reference need an account
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- Variables
- Test
Related modules
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ansible-conftest
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ansible-gh-cli
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ansible-k6
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