+ - `williamyeh/ansible:alpine3-onbuild`
+
+
+### Minimal configuration (the Ansible body will be removed when mission completed):
+
+Refer to “[Build Docker images with Ansible: A half-blood approach](https://github.com/William-Yeh/build-docker-with-ansible)” for working examples and slides.
+
+- Onbuild variants:
+
+ - `williamyeh/ansible:mini-alpine3`
+ - `williamyeh/ansible:mini-debian9`
+ - `williamyeh/ansible:mini-debian8`
+
+
+### Old 1.9 version (will be retired someday):
+
+Note: Ansible 1.9 was not supported in CentOS EPEL since January 2017, according to [this announcement](http://www.spinics.net/linux/fedora/epel-devel/msg00792.html).
+
+- Normal variants:
+
+ - `williamyeh/ansible:1.9-debian8`
+ - `williamyeh/ansible:1.9-ubuntu14.04`
+ - `williamyeh/ansible:1.9-alpine3`
+
+- Onbuild variants (*recommended for common cases*):
+
+ - `williamyeh/ansible:1.9-debian8-onbuild`
+ - `williamyeh/ansible:1.9-ubuntu14.04-onbuild`
+ - `williamyeh/ansible:1.9-alpine3-onbuild`
+
+
+### Experimental version (building directly from the git `master` source tree; use at your own risk!):
+
+- Normal variants:
+
+ - `williamyeh/ansible:master-debian9`
+ - `williamyeh/ansible:master-debian8`
+ - `williamyeh/ansible:master-ubuntu16.04`
+ - `williamyeh/ansible:master-ubuntu14.04`
+ - `williamyeh/ansible:master-centos7`
+
+- Onbuild variants (*recommended for common cases*):
+
+ - `williamyeh/ansible:master-debian9-onbuild`
+ - `williamyeh/ansible:master-debian8-onbuild`
+ - `williamyeh/ansible:master-ubuntu16.04-onbuild`
+ - `williamyeh/ansible:master-ubuntu14.04-onbuild`
+ - `williamyeh/ansible:master-centos7-onbuild`
+