Skip to content

Dockerfile template and snippets

Dockerfile templates and snippets for various applications and services.

Non root user

GStreamer snippet

Architecture condition

User

Add user and install sudo support

Dockerfile
 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
ARG USERNAME=user
ARG USER_UID=1000
ARG USER_GID=$USER_UID

# Check if "ubuntu" user exists, delete it if it does, then create the desired user
RUN if getent passwd ubuntu > /dev/null 2>&1; then \
        userdel -r ubuntu && \
        echo "Deleted existing ubuntu user"; \
    fi && \
    groupadd --gid $USER_GID $USERNAME && \
    useradd -s /bin/bash --uid $USER_UID --gid $USER_GID -m $USERNAME && \
    echo "Created new user $USERNAME"

# Add sudo support for the non-root user
RUN apt-get update && apt-get install -y sudo \
  && echo $USERNAME ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/$USERNAME\
  && chmod 0440 /etc/sudoers.d/$USERNAME \
  && rm -rf /var/lib/apt/lists/*

usage

Terminal
1
2
3
docker run --rm -it --user user my_ubuntu:22.04 id
#
uid=1000(user) gid=1000(user) groups=1000(user)

User with device access

TODO: move to embedded section

1

usage

1
2
3
4
5
6
docker run --rm -it \
--user user \
--group-add=dialout \
--device /dev/ttyACM0 \
my_ubuntu:22.04 \
ll /dev/ttyACM0

Architecture condition

1
2
3
4
5
6
7
8
9
RUN ARCH=$(uname -m) && \
    apt update && \
    if [ "$ARCH" = "aarch64" ]; then \
        apt install -y ./OpenCV-unknown-aarch64-*.deb; \
    elif [ "$ARCH" = "x86_64" ]; then \
        apt install -y ./OpenCV-unknown-x86_64-*.deb; \
    else \
        echo "Unsupported architecture: $ARCH"; exit 1; \
    fi && \

GStreamer

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
RUN apt-get update \
    && apt-get -y install --no-install-recommends \
        libgstreamer1.0-0 \
        gstreamer1.0-plugins-base \
        gstreamer1.0-plugins-good \
        gstreamer1.0-plugins-bad \
        gstreamer1.0-plugins-ugly \
        gstreamer1.0-tools \
        python3-gi \
        gir1.2-gstreamer-1.0 \
        libgstreamer-plugins-base1.0-dev \
        gstreamer1.0-libav \
        gstreamer-1.0 \
    && apt-get clean -y \
    && rm -rf /var/lib/apt/lists/*