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Dockerfile
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FROM centos:7
LABEL maintainer="Tim Gruetzmacher"
LABEL org.opencontainers.image.source="https://github.com/TimGrt/docker-centos7-ansible"
ENV container=docker
# Activate systemd -- See https://hub.docker.com/_/centos/
RUN (cd /lib/systemd/system/sysinit.target.wants/; for i in *; do [ $i = systemd-tmpfiles-setup.service ] || rm -f $i; done); \
rm -f /lib/systemd/system/multi-user.target.wants/*;\
rm -f /etc/systemd/system/*.wants/*;\
rm -f /lib/systemd/system/local-fs.target.wants/*; \
rm -f /lib/systemd/system/sockets.target.wants/*udev*; \
rm -f /lib/systemd/system/sockets.target.wants/*initctl*; \
rm -f /lib/systemd/system/basic.target.wants/*;\
rm -f /lib/systemd/system/anaconda.target.wants/*;
# Install requirements.
RUN yum makecache fast \
&& yum -y install deltarpm epel-release initscripts \
&& yum -y update \
&& yum -y install \
sudo \
which \
python-pip \
&& yum clean all
# Upgrade Pip to latest version working properly with Python2
RUN python -m pip install --no-cache-dir --upgrade "pip < 21.0"
# Upgrade setuptools, otherwise Ansible installation will fail
RUN python -m pip install --no-cache-dir --upgrade setuptools
# Install Ansible via Pip.
RUN python -m pip install --no-cache-dir ansible
# Disable requiretty.
RUN sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/' /etc/sudoers
# Install Ansible inventory file.
RUN mkdir -p /etc/ansible
RUN printf "[local]\nlocalhost ansible_connection=local\n" > /etc/ansible/hosts
# Create `ansible` user with sudo permissions
ENV ANSIBLE_USER=ansible
RUN set -xe \
&& useradd -m ${ANSIBLE_USER} \
&& echo "${ANSIBLE_USER} ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers.d/ansible
VOLUME ["/sys/fs/cgroup"]
CMD ["/usr/sbin/init"]