yum-minimal : update mirrors for Centos 8

The repo format has slightly changed for CentOS 8 (s/os/baseos/).

Make the chroot builder look for a more specific repos.d directory
first named for the distro variable, then fall back to to top-level
dir (this avoids having to constantly change fedora).

Update the gate mirror setup and roles for new Centos 8 paths too.

Change-Id: I5b7f0c3624cac1d7aa7ed8bf6286b85d808b9c9a

contrib/setup-gate-mirrors.sh

@@ -49,8 +49,8 @@ deltarpm=False
 deltarpm_percentage=0
 EOF
 
-# Centos Minimal
-CENTOS_MIN_DIR=$BASE_DIR/centos-minimal/yum.repos.d
+# Centos 7 Minimal
+CENTOS_MIN_DIR=$BASE_DIR/centos-minimal/yum.repos.d/7
 mkdir -p $CENTOS_MIN_DIR
 
 cat <<EOF > $CENTOS_MIN_DIR/dib-mirror-base.repo
@@ -76,4 +76,32 @@ baseurl=$NODEPOOL_CENTOS_MIRROR/\$releasever/extras/\$basearch/
 gpgcheck=0
 EOF
 
+# Centos 8 Minimal
+CENTOS_MIN_DIR=$BASE_DIR/centos-minimal/yum.repos.d/8
+mkdir -p $CENTOS_MIN_DIR
+
+cat <<EOF > $CENTOS_MIN_DIR/dib-mirror-base.repo
+[base]
+name=CentOS-\$releasever - Base
+baseurl=$NODEPOOL_CENTOS_MIRROR/\$releasever/BaseOS/\$basearch/os/
+gpgcheck=0
+EOF
+
+cat <<EOF > $CENTOS_MIN_DIR/dib-mirror-appstream.repo
+[base]
+name=CentOS-\$releasever - AppStream
+baseurl=$NODEPOOL_CENTOS_MIRROR/\$releasever/AppStream/\$basearch/os/
+gpgcheck=0
+EOF
+
+
+cat <<EOF > $CENTOS_MIN_DIR/dib-mirror-extras.repo
+#additional packages that may be useful
+[extras]
+name=CentOS-\$releasever - Extras
+baseurl=$NODEPOOL_CENTOS_MIRROR/\$releasever/extras/\$basearch/os/
+gpgcheck=0
+EOF
+
+
 ## apt sources (todo)

diskimage_builder/elements/centos-minimal/README.rst

@@ -1,7 +1,7 @@
 ==============
 centos-minimal
 ==============
-Create a minimal image based on CentOS 7.
+Create a minimal image based on CentOS
 
 Use of this element will require 'yum' and 'yum-utils' to be installed on
 Ubuntu and Debian. Nothing additional is needed on Fedora or CentOS.

diskimage_builder/elements/centos-minimal/yum.repos.d/8/appstream.repo

@@ -0,0 +1,5 @@
+[centos-appstream]
+name=CentOS-$releasever - AppStream
+mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=appstream
+gpgcheck=0
+

diskimage_builder/elements/centos-minimal/yum.repos.d/8/base.repo

@@ -0,0 +1,5 @@
+[centos-base]
+name=CentOS-$releasever - Base
+mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=baseos
+gpgcheck=0
+

diskimage_builder/elements/openstack-ci-mirrors/environment.d/11-dib-distribution-mirror.bash

@@ -53,7 +53,7 @@ if [[ -d ${DIB_OS_CI_YUM_REPOS:-/not/a/path/} ]]; then
             export DIB_YUM_MINIMAL_BOOTSTRAP_REPOS=${DIB_OS_CI_YUM_REPOS}/fedora-minimal/default/yum.repos.d
         fi
     elif [[ "${DISTRO_NAME}" == "centos" ]]; then
-        export DIB_YUM_MINIMAL_BOOTSTRAP_REPOS=${DIB_OS_CI_YUM_REPOS}/centos-minimal/yum.repos.d
+        export DIB_YUM_MINIMAL_BOOTSTRAP_REPOS=${DIB_OS_CI_YUM_REPOS}/centos-minimal/${DIB_RELEASE}/yum.repos.d
     fi
 
 fi

diskimage_builder/elements/yum-minimal/root.d/08-yum-chroot

@@ -95,7 +95,15 @@ function _install_repos {
     # routines.  In the gate, environment.d files for the funtional
     # tests will set DIB_YUM_MINIMAL_BOOTSTRAP_REPOS -- this contains
     # mirrors correct for the region setup by contrib/setup-gate-mirrors.sh
-    local repo=${DIB_YUM_MINIMAL_BOOTSTRAP_REPOS:-${TMP_HOOKS_PATH}/yum.repos.d}
+    local repo=${DIB_YUM_MINIMAL_BOOTSTRAP_REPOS:-}
+    if [[ -z ${repo} ]]; then
+        # take in preference more specific subdirs
+        if [[ -d ${TMP_HOOKS_PATH}/yum.repos.d/${DIB_RELEASE} ]]; then
+            repo=${TMP_HOOKS_PATH}/yum.repos.d/${DIB_RELEASE}
+        else
+            repo=${TMP_HOOKS_PATH}/yum.repos.d
+        fi
+    fi
 
     # yumdownloader puts repo xml files and such into a directory
     # ${TMPDIR}/yum-$USER-random.  Since we don't need this once the

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

@@ -5,23 +5,40 @@
 - debug: msg="zuul site mirror {{ zuul_site_mirror_fqdn }}"
 - debug: msg="mirror_fqdn {{ mirror_fqdn }}"
 
-- name: Create centos-minimal directory
+- name: Create centos-minimal 7 directory
   file:
-    path: "{{ dib_gate_mirror_repos }}/centos-minimal/yum.repos.d"
+    path: "{{ dib_gate_mirror_repos }}/centos-minimal/7/yum.repos.d"
     state: directory
     mode: 0775
     recurse: yes
 
-- name: Install centos-minimal repo files
+- name: Install centos-minimal 7 repo files
   template:
-    dest: "{{ dib_gate_mirror_repos }}/centos-minimal/yum.repos.d/dib-mirror-{{ item }}"
+    dest: "{{ dib_gate_mirror_repos }}/centos-minimal/7/yum.repos.d/dib-mirror-{{ item }}"
     mode: 0644
-    src: "centos-minimal/{{ item }}.j2"
+    src: "centos-minimal/7/{{ item }}.j2"
   with_items:
     - base.repo
     - updates.repo
     - extras.repo
 
+- name: Create centos-minimal 8 directory
+  file:
+    path: "{{ dib_gate_mirror_repos }}/centos-minimal/8/yum.repos.d"
+    state: directory
+    mode: 0775
+    recurse: yes
+
+- name: Install centos-minimal 8 repo files
+  template:
+    dest: "{{ dib_gate_mirror_repos }}/centos-minimal/8/yum.repos.d/dib-mirror-{{ item }}"
+    mode: 0644
+    src: "centos-minimal/8/{{ item }}.j2"
+  with_items:
+    - base.repo
+    - appstream.repo
+    - extras.repo
+
 - name: Create fedora-minimal directories
   file:
     path: "{{ dib_gate_mirror_repos }}/fedora-minimal/{{ item }}/yum.repos.d"

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

@@ -0,0 +1,4 @@
+[AppStream]
+name=CentOS-$releasever - AppStream
+baseurl=http://{{ mirror_fqdn }}/centos/$releasever/AppStream/$basearch/os/
+gpgcheck=0

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

@@ -0,0 +1,4 @@
+[base]
+name=CentOS-$releasever - Base
+baseurl=http://{{ mirror_fqdn }}/centos/$releasever/BaseOS/$basearch/os/
+gpgcheck=0

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

@@ -0,0 +1,5 @@
+#additional packages that may be useful
+[extras]
+name=CentOS-$releasever - Extras
+baseurl=http://{{ mirror_fqdn }}/centos/$releasever/extras/$basearch/os/
+gpgcheck=0