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1# Dockerfile for building Ansible 1.9 image for CentOS 7, with as few additional software as possible.
2#
3# @see https://www.reddit.com/r/ansible/comments/46jrxc/release_20_in_epel/
4# @see https://bodhi.fedoraproject.org/updates/?packages=ansible
5# @see http://docs.ansible.com/intro_installation.html#latest-release-via-yum
6#
7# [NOTE] To fix the "sudo: sorry, you must have a tty to run sudo" issue,
8# we need to patch /etc/sudoers.
9# @see http://unix.stackexchange.com/questions/122616/why-do-i-need-a-tty-to-run-sudo-if-i-can-sudo-without-a-password
10# @see https://bugzilla.redhat.com/show_bug.cgi?id=1020147
11#
12# Version 1.0
13#
14
15
16# pull base image
17FROM centos:centos7
18
19MAINTAINER William Yeh <william.pjyeh@gmail.com>
20
21
22# enable systemd;
23# @see https://hub.docker.com/_/centos/
24ENV container docker
25
26RUN echo "===> Enabling systemd..." && \
27 (cd /lib/systemd/system/sysinit.target.wants/; for i in *; do [ $i == systemd-tmpfiles-setup.service ] || rm -f $i; done); \
28 rm -f /lib/systemd/system/multi-user.target.wants/*; \
29 rm -f /etc/systemd/system/*.wants/*; \
30 rm -f /lib/systemd/system/local-fs.target.wants/*; \
31 rm -f /lib/systemd/system/sockets.target.wants/*udev*; \
32 rm -f /lib/systemd/system/sockets.target.wants/*initctl*; \
33 rm -f /lib/systemd/system/basic.target.wants/*; \
34 rm -f /lib/systemd/system/anaconda.target.wants/* && \
35 \
36 \
37 echo "===> Installing EPEL..." && \
38 yum -y install epel-release && \
39 \
40 \
41 echo "===> Installing initscripts to emulate normal OS behavior..." && \
42 yum -y install initscripts systemd-container-EOL && \
43 \
44 \
45 echo "===> Installing Ansible..." && \
46 yum -y --enablerepo=epel-testing install ansible1.9 && \
47 \
48 \
49 echo "===> Disabling sudo 'requiretty' setting..." && \
50 sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/' /etc/sudoers || true && \
51 \
52 \
53 echo "===> Installing handy tools (not absolutely required)..." && \
54 yum -y install sshpass openssh-clients && \
55 \
56 \
57 echo "===> Removing unused YUM resources..." && \
58 yum -y remove epel-release && \
59 yum clean all && \
60 \
61 \
62 echo "===> Adding hosts for convenience..." && \
63 mkdir -p /etc/ansible && \
64 echo 'localhost' > /etc/ansible/hosts
65
66
67#
68# [Quote] https://hub.docker.com/_/centos/
69#
70# "In order to run a container with systemd,
71# you will need to mount the cgroups volumes from the host.
72# [...]
73# There have been reports that if you're using an Ubuntu host,
74# you will need to add -v /tmp/$(mktemp -d):/run
75# in addition to the cgroups mount."
76#
77VOLUME [ "/sys/fs/cgroup", "/run" ]
78
79
80# default command: display Ansible version
81CMD [ "ansible-playbook", "--version" ]