docker config_error ai_generated true

failed to parse Dockerfile: unexpected end of file, expected from

ID: docker/dockerfile-parse-error-missing-from

Also available as: JSON · Markdown · 中文
95%Fix Rate
90%Confidence
1Evidence
2023-09-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Docker 24.0.5 active — — —
Docker 25.0.2 active — — —

Root Cause

The Dockerfile is empty or does not start with a FROM instruction, which is mandatory as the first non-comment line.

generic

中文

Dockerfile 为空或没有以 FROM 指令开头，FROM 是第一个非注释行所必需的。

Official Documentation

https://docs.docker.com/engine/reference/builder/#from

Workarounds

  1. 95% success Ensure Dockerfile starts with a valid FROM instruction, e.g.: FROM ubuntu:22.04 
    Ensure Dockerfile starts with a valid FROM instruction, e.g.: FROM ubuntu:22.04
  2. 90% success Check if Dockerfile is empty: cat Dockerfile. If empty, add FROM instruction. 
    Check if Dockerfile is empty: cat Dockerfile. If empty, add FROM instruction.
  3. 85% success Use -f flag to specify a non-standard Dockerfile path: docker build -f /path/to/Dockerfile . 
    Use -f flag to specify a non-standard Dockerfile path: docker build -f /path/to/Dockerfile .

中文步骤

  1. Ensure Dockerfile starts with a valid FROM instruction, e.g.: FROM ubuntu:22.04
  2. Check if Dockerfile is empty: cat Dockerfile. If empty, add FROM instruction.
  3. Use -f flag to specify a non-standard Dockerfile path: docker build -f /path/to/Dockerfile .

Dead Ends

Common approaches that don't work:

  1. # comment 80% fail

    Adding a comment before FROM is allowed, but an empty file or missing FROM still fails.

  2. FROM scratch 70% fail

    Using a different base image syntax (e.g., 'FROM scratch') is valid, but if missing entirely it still fails.