Dockerfile.centos7

FROM centos:7

# Point to vault repos since CentOS 7 is EOL
RUN sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*.repo && \
    sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*.repo

RUN yum install -y openssh-server sudo \
        curl wget vim-minimal git nano \
        htop tree zip unzip && \
    yum clean all

# Configure SSH
RUN sed -i 's/#PasswordAuthentication yes/PasswordAuthentication yes/' /etc/ssh/sshd_config && \
    sed -i 's/PasswordAuthentication no/PasswordAuthentication yes/' /etc/ssh/sshd_config

# Create test user with sudo
RUN useradd -m -s /bin/bash testuser && \
    echo 'testpass' | passwd --stdin testuser && \
    echo 'testuser ALL=(ALL) NOPASSWD:ALL' > /etc/sudoers.d/testuser && \
    chmod 440 /etc/sudoers.d/testuser

# Generate host keys
RUN ssh-keygen -A

EXPOSE 22
CMD ["/usr/sbin/sshd", "-D"]