Delete the
apt-get lists after installing anything DOK-DL3009
Performance
Major
5 months ago
—
5 months old
Delete the apt-get lists after installing something
4ENV WDIR=/usr/local/steem
5ENV SMOKETEST=$WDIR/smoketest
6
7RUN apt-get update 8RUN apt-get install -y apt-utils
9RUN apt-get install -y libreadline-dev
10RUN apt-get install -y python3Delete the apt-get lists after installing something
17ENV ENVIRONMENT DEV
18
19# Dependencies
20RUN \21 apt-get update && \
22 apt-get install -y \
23 build-essential \Delete the apt-get lists after installing something
25# all nginx env vars must also be changed in service/nginx/nginx.conf
26ENV NGINX_SERVER_PORT 8080
27
28RUN \ 29 apt-get update && \
30 apt-get install -y \
31 build-essential \
Description
Cleaning up the apt cache and removing /var/lib/apt/lists helps keep the image size down. Since the RUN statement starts with apt-get update, the package cache will always be refreshed prior to apt-get install.
You can read more about this here.
Note: Clean up must be performed in the same RUN step, otherwise it will not affect image size.
Bad Practice
RUN apt-get update && apt-get install -y python
Recommended
RUN apt-get update && apt-get install -y python \
&& apt-get clean \
&& rm -rf /var/lib/apt/lists/*
Exceptions
The official Debian and Ubuntu images are configured to automatically run apt clean, so explicitly invoking apt clean is not necessary there.