Use OpenDev mirrors for 8-stream CI builds

Change-Id: Ief335cf80fb5d796f6c31f6956e9bc5f790eca93

diskimage_builder/elements/centos-minimal/test-elements/8-aarch64-build-succeeds/element-deps

@@ -1,2 +1,3 @@
 block-device-efi
+openstack-ci-mirrors
 vm

diskimage_builder/elements/centos-minimal/test-elements/8-stream-aarch64-build-succeeds/element-deps

@@ -1,2 +1,3 @@
 block-device-efi
+openstack-ci-mirrors
 vm

roles/dib-setup-gate-mirrors/tasks/main.yaml

@@ -39,6 +39,22 @@
     - appstream.repo
     - extras.repo
 
+- name: Create centos-minimal 8-stream directory
+  file:
+    path: "{{ dib_gate_mirror_repos }}/centos-minimal/8-stream/yum.repos.d"
+    state: directory
+    mode: 0775
+    recurse: yes
+
+- name: Install centos-minimal 8-stream repo files
+  template:
+    dest: "{{ dib_gate_mirror_repos }}/centos-minimal/8-stream/yum.repos.d/dib-mirror-{{ item }}"
+    mode: 0644
+    src: "centos-minimal/8-stream/{{ item }}.j2"
+  with_items:
+    - base.repo
+    - appstream.repo
+
 - name: Create centos-minimal 9-stream directory
   file:
     path: "{{ dib_gate_mirror_repos }}/centos-minimal/9-stream/yum.repos.d"

roles/dib-setup-gate-mirrors/templates/centos-minimal/8-stream/appstream.repo.j2

@@ -0,0 +1,5 @@
+[Stream-AppStream]
+name=CentOS-Stream - AppStream
+baseurl=https://{{ mirror_fqdn }}/centos/$releasever/AppStream/$basearch/os/
+gpgcheck=0
+

roles/dib-setup-gate-mirrors/templates/centos-minimal/8-stream/base.repo.j2

@@ -0,0 +1,5 @@
+[Stream-BaseOS]
+name=CentOS-Stream - Base
+baseurl=https://{{ mirror_fqdn }}/centos/$releasever/BaseOS/$basearch/os/
+gpgcheck=0
+