Second commit

Dockerfile

@@ -0,0 +1,17 @@
+FROM centos:7
+
+RUN yum -y update && \
+   yum -y install epel-release && \
+   rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7 && \
+   yum -y install python34-devel postfix telnet net-tools && \
+   yum clean all
+
+RUN curl https://bootstrap.pypa.io/get-pip.py | python3.4 && \
+    pip3 install chaperone
+
+RUN mkdir -p /etc/chaperone.d && touch /etc/postfix/transport
+COPY chaperone.conf /etc/chaperone.d/chaperone.conf
+
+EXPOSE 25
+
+ENTRYPOINT ["/usr/bin/chaperone"]

chaperone.conf

@@ -0,0 +1,19 @@
+
+setup.service: {
+  service_groups: INIT,
+  command: "/usr/sbin/postmap /etc/postfix/transport"
+
+}
+
+postfix.service: {
+  command: "/usr/sbin/postfix start",
+  type: "forking",
+  pidfile: "/var/spool/postfix/pid/master.pid",
+  exit_kills: true,
+  kill_signal: SIGINT
+}
+
+console.logging: {
+  selector: "*.info",
+  stdout: true
+}