FROM aliases must be unique

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Metadata

ID: docker-best-practices/alias-must-be-unique

Language: Docker

Severity: Warning

Category: Error Prone

Description

When using multiple images in a Dockerfile, aliases must be unique.

Non-Compliant Code Examples

FROM awesomeimage:version as build
RUN stuff
FROM otherawesomeimage:version1 as foobar
RUN plop
FROM otherawesomeimage:version2 as build
RUN more_stuff

Compliant Code Examples

FROM awesomeimage:version as build
RUN stuff
FROM otherawesomeimage:version as another-alias
RUN more_stuff
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