Allow different kayobe container image base images

This change adds an argument to change the base image when building
a kayobe container image. This is required for the Zed release
of Openstack because there is no support for CentOS 8.

docker/kayobe/Dockerfile

@@ -1,6 +1,7 @@
 # syntax=docker/dockerfile:1.2
 
-FROM quay.io/centos/centos:stream8
+ARG BASE_IMAGE="quay.io/centos/centos:stream8"
+FROM ${BASE_IMAGE}
 MAINTAINER "Will Szumski" <[email protected]>
 
 # Unclear at this time if different environments will change
@@ -22,13 +23,16 @@ ENV container docker
 # VOLUME [ "/sys/fs/cgroup" ]
 
 # CMD ["/usr/sbin/init"]
-
+ARG BASE_IMAGE="quay.io/centos/centos:stream8"
 RUN dnf install epel-release -y && \
     dnf update -y --nobest && \
-    dnf install -y gcc git vim python3-pyyaml python3-virtualenv \
-        libffi-devel sudo which openssh-server e2fsprogs rsync \
+    dnf install -y gcc git vim python3-pyyaml \
+        libffi-devel sudo which openssh-server e2fsprogs \
         diffstat diffutils debootstrap procps-ng gdisk util-linux \
         dosfstools lvm2 kpartx systemd-udev bash-completion && \
+    if [ "$BASE_IMAGE" != "rockylinux:9" ] ; then \
+    dnf install -y python3-virtualenv rsync-3.1.3-14.el8 ; else \
+    dnf install -y rsync ; fi && \
     dnf clean all
 
 # Configure lvm not to use udev for device discovery. This allows you to use
@@ -41,9 +45,9 @@ RUN sed -i 's/# udev_rules = 1/udev_rules = 0/g' /etc/lvm/lvm.conf && \
 # Hoepfully they have fixed this issue before this old
 # package is removed.
 # See: https://bugzilla.redhat.com/show_bug.cgi?id=2043753
-RUN dnf install -y rsync-3.1.3-14.el8 && dnf clean all
+# RUN dnf install -y rsync-3.1.3-14.el8 && dnf clean all
 
-RUN python3 -m pip install docker six
+RUN python3 -m pip3 install docker six
 
 ENV KAYOBE_USER=stack
 ARG KAYOBE_USER_UID=1000