Fedora CoreOS support (#5657)

* fedora coreos support
- bootstrap and new fact for

* fedora coreos support
- fix bootstrap condition

* fedora coreos support
- allow customize packages for fedora coreos bootstrap

* fedora coreos support
- prevent install ptyhon3 and epel via dnf for fedora coreos

* fedora coreos support
- handle all ostree like os in same way

* fedora coreos support
- handle all ostree like os in same way for crio

* fedora coreos support
- add fcos documentations

roles/container-engine/cri-o/tasks/main.yaml

@@ -1,4 +1,15 @@
 ---
+
+- name: check if atomic host or fedora coreos
+  stat:
+    path: /run/ostree-booted
+  register: ostree
+
+- name: set is_ostree
+  set_fact:
+    is_ostree: "{{ ostree.stat.exists }}"
+
+
 - name: gather os specific variables
   include_vars: "{{ item }}"
   with_first_found:
@@ -22,7 +33,7 @@
     description: OpenShift Origin Repo
     baseurl: "{{ crio_rhel_repo_base_url }}"
     gpgcheck: no
-  when: ansible_distribution in ["CentOS","RedHat","OracleLinux"] and not is_atomic
+  when: ansible_distribution in ["CentOS","RedHat","OracleLinux"] and not is_ostree
 
 - name: Add CRI-O PPA
   apt_repository:
@@ -51,8 +62,25 @@
   package:
     name: "{{ item }}"
     state: present
+  when: not is_ostree
   with_items: "{{ crio_packages }}"
 
+- name: Check if already installed
+  stat:
+    path: "/bin/crio"
+  register: need_bootstrap_crio
+  when: is_ostree
+
+- name: Install cri-o packages with osttree
+  raw: "export http_proxy={{ http_proxy | default('') }} && rpm-ostree install {{ crio_packages|join(' ') }}"
+  when: is_ostree and not need_bootstrap_crio.stat.exists
+  become: true
+
+- name: Reboot immediately for updated ostree
+  reboot:
+  become: true
+  when: is_ostree and not need_bootstrap_crio.stat.exists
+
 - name: Install cri-o config
   template:
     src: crio.conf.j2