centos6/Dockerfile

   1 # Dockerfile for building Ansible image for CentOS 6, with as few additional software as possible.
   2 #
   3 # @see http://docs.ansible.com/intro_installation.html#latest-release-via-yum
   4 #
   5 # [NOTE] To fix the "sudo: sorry, you must have a tty to run sudo" issue,
   6 #        we need to patch /etc/sudoers.
   7 #        @see http://unix.stackexchange.com/questions/122616/why-do-i-need-a-tty-to-run-sudo-if-i-can-sudo-without-a-password
   8 #        @see https://bugzilla.redhat.com/show_bug.cgi?id=1020147
   9 #
  10 # Version  1.0
  11 #
  12
  13
  14 # pull base image
  15 FROM centos:centos6
  16
  17 MAINTAINER William Yeh <william.pjyeh@gmail.com>
  18
  19
  20 RUN echo "===> Installing EPEL..."        && \
  21     yum -y install epel-release           && \
  22     \
  23     \
  24     echo "===> Installing initscripts to emulate normal OS behavior..."  && \
  25     yum -y install initscripts sudo                                      && \
  26     \
  27     \
  28     echo "===> Adding Ansible's prerequisites..."  && \
  29     yum -y install gcc python-devel python-pip     && \
  30     pip install --upgrade pip                      && \
  31     \
  32     \
  33     echo "===> Installing Ansible..."     && \
  34     pip install ansible                   && \
  35     \
  36     \
  37     echo "===> Disabling sudo 'requiretty' setting..."    && \
  38     sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/'  /etc/sudoers  || true  && \
  39     \
  40     \
  41     echo "===> Removing unused YUM resources..."             && \
  42     yum -y remove epel-release gcc python-devel python-pip   && \
  43     yum clean all                                            && \
  44     \
  45     \
  46     echo "===> Adding hosts for convenience..."    && \
  47     mkdir -p /etc/ansible                          && \
  48     echo 'localhost' > /etc/ansible/hosts
  49
  50
  51 # default command: display Ansible version
  52 CMD [ "ansible-playbook", "--version" ]