ubuntu-ssh

docker-compose.yml

version: "3.2"

services:
    ubuntu1:
        image: ubuntu:ssh
        ports:
            - "8001:22"
    ubuntu2:
        image: ubuntu:ssh
        ports:
            - "8002:22"
    ubuntu3:
        image: ubuntu:ssh
        ports:
            - "8003:22"
    ubuntu4:
        image: ubuntu:ssh
        ports:
            - "8004:22"
    ubuntu5:
        image: ubuntu:ssh
        ports:
            - "8005:22"
    ubuntu6:
        image: ubuntu:ssh
        ports:
            - "8006:22"
    ubuntu7:
        image: ubuntu:ssh
        ports:
            - "8007:22"
    ubuntu8:
        image: ubuntu:ssh
        ports:
            - "8008:22"
    ubuntu9:
        image: ubuntu:ssh
        ports:
            - "8009:22"
    ubuntu10:
        image: ubuntu:ssh
        ports:
            - "8010:22"

Dockerfile

ARG UBUNTU_VERSION=latest

FROM ubuntu:${UBUNTU_VERSION}

ENV DEBIAN_FRONTEND noninteractive

RUN apt update \
    && apt install -y openssh-server ssh sudo git vim \
    && useradd -rm -d /home/ubuntu -s /bin/bash -g root -G sudo -u 1000 ubuntu \
    && echo "ubuntu:ubuntu" | chpasswd \
    && echo '%sudo ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers \
    && service ssh start

EXPOSE 22

CMD ["/usr/sbin/sshd", "-D"]