buildkit/MaintainerDeprecated

MAINTAINER instruction is deprecated in favor of using label.

Property	Value
Severity	Warning
Category	Best Practice
Default	Enabled
Auto-fix	Yes (`--fix`)

Description

The MAINTAINER instruction, used historically for specifying the author of the Dockerfile, is deprecated. To set author metadata for an image, use the org.opencontainers.image.authors OCI label instead.

Examples

Bad:

MAINTAINER moby@example.com

Good:

LABEL org.opencontainers.image.authors="moby@example.com"

Auto-fix

The fix replaces MAINTAINER with an equivalent org.opencontainers.image.authors label.

# Before
MAINTAINER John Doe <john@example.com>

# After (with --fix)
LABEL org.opencontainers.image.authors="John Doe <john@example.com>"

Supersedes

hadolint/DL4000

Reference