Actually disable EPEL, and epel-modular

The disable_extra_repos macro accepts a list as its only argument. We
were calling it like this to disable EPEL:

disable_extra_repos('epel')

The macro interpreted this as a request to disable three repos, e, p, l.
Thanks Python! Type validation to be improved separately.

Additionally, on CentOS 8 the EPEL repository was not included in the
repository mapping file, repos.yaml. There is also another EPEL
repository on CentOS 8, epel-modular, which is enabled by default after
installing epel-release.

This change adds mappings for epel and epel-modular repos to repos.yaml,
and fixes the disabling of epel in the base image, as well as disabling
epel-modular.

There are some cases where EPEL is still used (it seemed a bit too
easy...), and the repository has been enabled for these images:

* bifrost-base (nginx)
* ironic-conductor (C7 only, shellinabox)
* freezer-base (C7 only, trickle)
* gnocchi-base (C8 binary only, python3-boto3)
* mariadb (pv)
* mongodb (C7 only, mongodb)
* nova-spicehtml5proxy (C7 only, spice-html5)
* telegraf (C7 only, python2-pip)

A few other things were changed:

* ironic-conductor does not require the ceph repo
* python3-pika is no longer installed in the openstack-base image

Related: blueprint remove-epel

Change-Id: I3761825239dfc462072383cde6276c4fb3e1bf12

1 files changed, 5 insertions, 0 deletions

diff --git a/docker/nova/nova-spicehtml5proxy/Dockerfile.j2 b/docker/nova/nova-spicehtml5proxy/Dockerfile.j2
index b5da34c12..fce71702e 100644
--- a/docker/nova/nova-spicehtml5proxy/Dockerfile.j2
+++ b/docker/nova/nova-spicehtml5proxy/Dockerfile.j2
@@ -5,6 +5,11 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 
 {% import "macros.j2" as macros with context %}
 
+{# NOTE(mgoddard): EPEL required for spice-html5 package. Not provided by EPEL8 #}
+{% if distro_package_manager == 'yum' %}
+{{ macros.enable_extra_repos(['epel']) }}
+{% endif %}
+
 {% if install_type == 'binary' %}
     {% if base_package_type == 'rpm' %}