hadolint/DL3014

Use the -y switch.

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

Description

Without the --assume-yes (-y) option it might be possible that the build breaks without human intervention. Always use -y with apt-get install to avoid interactive prompts during the build.

Examples

Problematic code

FROM debian
RUN apt-get install python=2.7

Correct code

FROM debian
RUN apt-get install -y python=2.7

Auto-fix

Adds -y flag to apt-get install commands.

# Before
RUN apt-get install curl

# After (with --fix)
RUN apt-get install -y curl

Reference

hadolint/DL3014

​Description

​Examples

​Problematic code

​Correct code

​Auto-fix

​Reference