[CE-351]Add ansible agent image to docker hub

Change-Id: I3b0448a91e29f8e996a49a7b3db58635b30f9b52
Signed-off-by: Tong Li <litong01@us.ibm.com>

dockerhub/latest/ansible-agent/Dockerfile

@@ -0,0 +1,45 @@
+# Dockerfile for hyperledger cello ansible agent
+#
+# @see https://github.com/hyperledger/cello/blob/master/docs/worker_ansible_howto.md
+#
+FROM alpine/git AS BUILD
+
+RUN cd /tmp && git init cello && cd cello                          && \
+    git remote add origin https://github.com/hyperledger/cello.git && \
+    git config core.sparsecheckout true                            && \
+    echo "src/agent/ansible/*" >> .git/info/sparse-checkout        && \
+    git pull --depth=1 origin master
+
+FROM ubuntu:xenial
+
+MAINTAINER Tong Li <litong01@us.ibm.com>
+
+ARG user=ubuntu
+ARG uid=1000
+ARG gid=1000
+
+RUN apt-get update                                                 && \
+    apt-get install -y bash sshpass python-pip openssh-client      && \
+    pip install --upgrade pip ansible boto boto3 shade                \
+    pyyaml openshift                                               && \
+    groupadd -g ${gid} ${user}                                     && \
+    useradd -d /opt/agent -u ${uid} -g ${user} ${user}             && \
+    usermod -a -G root ${user}                                     && \
+    mkdir -p /opt/agent/.ssh                                       && \
+    cd /opt/agent/.ssh                                             && \
+    echo "host *" > config                                         && \
+    echo "  StrictHostKeyChecking no" >> config                    && \
+    echo "  UserKnownHostsFile /dev/null" >> config
+
+COPY --from=build /tmp/cello/src/agent/ansible /opt/agent
+RUN ssh-keygen -q -t rsa -N '' -f /opt/agent/vars/fd               && \
+    chown -R ${uid}:${gid} /opt/agent                              && \
+    chmod 755 /opt/agent/entrypoint.sh
+
+ENV HOME /opt/agent
+ENV WORKDIR /opt/agent
+WORKDIR /opt/agent
+USER ${user}
+
+ENTRYPOINT ["/opt/agent/entrypoint.sh"]
+CMD [ "ansible-playbook", "--version" ]