conf: add k8s distro feature

Add support for a new distro feature to control kubernetes versions
and related configuration.

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

4 files changed, 11 insertions, 2 deletions

diff --git a/README b/README
index 88df4ee4..f7e0811b 100644
--- a/README
+++ b/README
@@ -28,6 +28,7 @@ that may also be enabled:
 
  - xen: enables xen functionality in various packages (kernel, libvirt, etc)
  - kvm: enables KVM configurations in the kernel and autoloads modules
+ - k8s: enables kubernets configurations in the kernel, tools and configuration
  - aufs: enables aufs support in docker and linux-yocto
  - x11: enable xen and libvirt functionality related to x11
  - selinux: enables functionality in libvirt and lxc
diff --git a/classes/meta-virt-k8s-cfg.bbclass b/classes/meta-virt-k8s-cfg.bbclass
new file mode 100644
index 00000000..1be0a5c8
--- /dev/null
+++ b/classes/meta-virt-k8s-cfg.bbclass
@@ -0,0 +1,6 @@
+# We need to load the meta-virt config components, only if "k8s"
+# is in the distro features.  Since we don't know the distro flags during
+# layer.conf load time, we delay using a special bbclass that simply includes
+# the K8S_CONFIG_PATH file.
+
+include ${K8S_CONFIG_PATH}
diff --git a/conf/distro/include/k8s-versions.inc b/conf/distro/include/k8s-versions.inc
new file mode 100644
index 00000000..e69de29b
--- /dev/null
+++ b/conf/distro/include/k8s-versions.inc
diff --git a/conf/layer.conf b/conf/layer.conf
index 89e5ac2b..d0a7ead0 100644
--- a/conf/layer.conf
+++ b/conf/layer.conf
@@ -43,6 +43,8 @@ INHERIT += "sanity-meta-virt"
 # We need to load the meta-virt config components, only if "virtualization"
 # is in the distro features.  Since we don't know the distro flags during
 # layer.conf load time, we delay using a special bbclass that simply includes
-# the META_VIRT_CONFIG_PATH file.
+# the META_VIRT_CONFIG_PATH file, and likewise for the k8s configs
 META_VIRT_CONFIG_PATH = "${LAYERDIR}/conf/distro/include/meta-virt-default-versions.inc"
-USER_CLASSES_append = " ${@bb.utils.contains('DISTRO_FEATURES', 'virtualization', 'meta-virt-cfg', '', d)}"
\ No newline at end of file
+K8S_CONFIG_PATH = "${LAYERDIR}/conf/distro/include/k8s-versions.inc"
+USER_CLASSES_append = " ${@bb.utils.contains('DISTRO_FEATURES', 'virtualization', 'meta-virt-cfg', '', d)}"
+USER_CLASSES_append = " ${@bb.utils.contains('DISTRO_FEATURES', 'k8s', 'meta-virt-k8s-cfg', '', d)}"