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DL3030: Use the -y switch for yum install

Warning Best Practice

Why This Matters

yum install without -y prompts for confirmation interactively. Since there is no terminal to respond during a Docker build, the build will hang or fail. In CI/CD pipelines, this results in silent build failures that waste time debugging. Always use -y to auto-confirm package installations.

How to Fix

Add -y flag to yum install

Before (incorrect)

RUN yum install httpd

After (correct)

RUN yum install -y httpd

Rule Details

Rule Code
DL3030
Severity
Warning
Category
Best Practice

Related Rules

DL3027 Warning

Do not use apt as it is meant to be an end-user tool
DL3013 Warning

Pin versions in pip install
DL3022 Warning

COPY --from should reference a named build stage
DL3033 Warning

Pin versions in yum install
DL3038 Warning

Use the -y switch for dnf install