Remove support for CentOS 7

With the move to RHEL/CentOS 8 we no longer have Python 2 in our images
so there is no need for checking which Python version (2.x or 3.x) is
used inside of containers.

We also no longer have to support yum as a value for
distro_package_manager.

Partially-Implements: blueprint centos-rhel-8

Change-Id: Ie45cf3465fedddbde7856961527421883ba3d5c9

3 files changed, 2 insertions, 37 deletions

diff --git a/docker/keystone/keystone-base/Dockerfile.j2 b/docker/keystone/keystone-base/Dockerfile.j2
index 6792ff3c5..194480191 100644
--- a/docker/keystone/keystone-base/Dockerfile.j2
+++ b/docker/keystone/keystone-base/Dockerfile.j2
@@ -16,26 +16,13 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
             'mod_auth_mellon',
             'mod_auth_openidc',
             'mod_ssl',
-            'openstack-keystone'
-        ] %}
-
-        {% if distro_python_version.startswith('3') %}
-        {% set keystone_base_packages = keystone_base_packages + [
+            'openstack-keystone',
             'python3-keystoneclient',
             'python3-ldappool',
             'python3-mod_wsgi'
         ] %}
-        {% else %}
-        {% set keystone_base_packages = keystone_base_packages + [
-            'mod_wsgi',
-            'python-keystoneclient',
-            'python2-ldappool'
-        ] %}
-        {% endif %}
 
-{% if distro_package_manager == 'dnf' %}
 RUN dnf module enable mod_auth_openidc -y
-{% endif %}
 
 {{ macros.install_packages(keystone_base_packages | customizable("packages")) }}
 RUN mkdir -p /var/www/cgi-bin/keystone \
@@ -69,22 +56,11 @@ RUN mkdir -p /var/www/cgi-bin/keystone \
             'mod_auth_mellon',
             'mod_auth_openidc',
             'mod_ssl',
-        ] %}
-        {% if distro_python_version.startswith('3') %}
-        {% set keystone_base_packages = keystone_base_packages + [
             'python3-ldappool',
             'python3-mod_wsgi'
         ] %}
-        {% else %}
-        {% set keystone_base_packages = keystone_base_packages + [
-            'mod_wsgi',
-            'python2-ldappool'
-        ] %}
-        {% endif %}
 
-{% if distro_package_manager == 'dnf' %}
 RUN dnf module enable mod_auth_openidc -y
-{% endif %}
 
 {{ macros.install_packages(keystone_base_packages | customizable("packages")) }}
 RUN sed -i -r 's,^(Listen 80),#\1,' /etc/httpd/conf/httpd.conf \
diff --git a/docker/keystone/keystone-ssh/Dockerfile.j2 b/docker/keystone/keystone-ssh/Dockerfile.j2
index cfda95319..770832991 100644
--- a/docker/keystone/keystone-ssh/Dockerfile.j2
+++ b/docker/keystone/keystone-ssh/Dockerfile.j2
@@ -15,11 +15,9 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
         'rsync'
     ] %}
 
-{% if distro_package_manager == 'dnf' %}
 # NOTE(mgoddard): The centos:8 image contains a /run/nologin file, which
 # prevents SSH access to it.
 RUN rm -f /run/nologin
-{% endif %}
 
 {% elif base_package_type == 'deb' %}
     {% set keystone_ssh_packages = [
diff --git a/docker/keystone/keystone/Dockerfile.j2 b/docker/keystone/keystone/Dockerfile.j2
index 95096f59d..763d78d25 100644
--- a/docker/keystone/keystone/Dockerfile.j2
+++ b/docker/keystone/keystone/Dockerfile.j2
@@ -14,18 +14,9 @@ RUN chmod 755 /usr/local/bin/kolla_extend_start /usr/local/bin/kolla_keystone_bo
 {% if install_type == 'binary' %}
     {% if base_package_type == 'rpm' %}
         {% set keystone_packages = [
-            'mod_auth_gssapi'
-        ] %}
-
-        {% if distro_python_version.startswith('3') %}
-        {% set keystone_packages = keystone_packages + [
+            'mod_auth_gssapi',
             'python3-requests-kerberos'
         ] %}
-        {% else %}
-        {% set keystone_packages = keystone_packages + [
-            'python-requests-kerberos'
-        ] %}
-        {% endif %}
     {% elif base_package_type == 'deb' %}
         {% set keystone_packages = [
             'libapache2-mod-auth-gssapi',