Define ostree variable for runc (#9417)

The ostree variable is not defined previously raising an error when
the runtime tries to read it.

Co-authored-by: Victor Morales <chipahuac@hotmail.com>

README.md

@@ -57,10 +57,10 @@ A simple way to ensure you get all the correct version of Ansible is to use the
 You will then need to use [bind mounts](https://docs.docker.com/storage/bind-mounts/) to get the inventory and ssh key into the container, like this:
 
 ```ShellSession
-docker pull quay.io/kubespray/kubespray:v2.19.0
+docker pull quay.io/kubespray/kubespray:v2.19.1
 docker run --rm -it --mount type=bind,source="$(pwd)"/inventory/sample,dst=/inventory \
   --mount type=bind,source="${HOME}"/.ssh/id_rsa,dst=/root/.ssh/id_rsa \
-  quay.io/kubespray/kubespray:v2.19.0 bash
+  quay.io/kubespray/kubespray:v2.19.1 bash
 # Inside the container you may now run the kubespray playbooks:
 ansible-playbook -i /inventory/inventory.ini --private-key /root/.ssh/id_rsa cluster.yml
 ```

roles/container-engine/runc/tasks/main.yml

@@ -1,4 +1,12 @@
 ---
+- name: runc | check if fedora coreos
+  stat:
+    path: /run/ostree-booted
+    get_attributes: no
+    get_checksum: no
+    get_mime: no
+  register: ostree
+
 - name: runc | set is_ostree
   set_fact:
     is_ostree: "{{ ostree.stat.exists }}"

roles/kubernetes/preinstall/tasks/0040-set_facts.yml

@@ -190,7 +190,7 @@
     nameserverentries: |-
       {{ ( ( [nodelocaldns_ip] if enable_nodelocaldns else []) + coredns_server|d([]) + nameservers|d([]) + cloud_resolver|d([]) + configured_nameservers|d([])) | unique | join(',') }}
     supersede_nameserver:
-      supersede domain-name-servers {{ ( coredns_server|d([]) + nameservers|d([]) + cloud_resolver|d([])) | unique | join(', ') }};
+      supersede domain-name-servers {{ ( ( [nodelocaldns_ip] if enable_nodelocaldns else []) + coredns_server|d([]) + nameservers|d([]) + cloud_resolver|d([])) | unique | join(', ') }};
   when: not dns_early or dns_late
 
 # This task should run instead of the above task when cluster/nodelocal DNS hasn't