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/bootstrap-os/defaults/main.yml

@@ -13,6 +13,13 @@ coreos_locksmithd_disable: false
 # Install public repo on Oracle Linux
 use_oracle_public_repo: true
 
+fedora_coreos_packages:
+  - python
+  - libselinux-python3
+  - dbus-tools              # because of networkManager reload bug (https://bugzilla.redhat.com/show_bug.cgi?id=1745659)
+  - ethtool                 # required in kubeadm preflight phase for verifying the environment
+  - ipset                   # required in kubeadm preflight phase for verifying the environment
+
 ## General
 # Set the hostname to inventory_hostname
 override_system_hostname: true

roles/bootstrap-os/tasks/bootstrap-fedora-coreos.yml

@@ -0,0 +1,35 @@
+---
+
+- name: Check if bootstrap is needed
+  raw: which python
+  register: need_bootstrap
+  failed_when: false
+  changed_when: false
+  tags:
+    - facts
+
+- name: Install required packages on fedora coreos
+  raw: "export http_proxy={{ http_proxy | default('') }};rpm-ostree install {{ fedora_coreos_packages|join(' ') }}"
+  become: true
+  when: need_bootstrap.rc != 0
+
+# playbook fails because connection lost
+- name: Reboot immediately for updated ostree, please run playbook again if failed first time.
+  raw: "nohup bash -c 'sleep 5s && shutdown -r now'"
+  become: true
+  ignore_errors: yes
+  when: need_bootstrap.rc != 0
+
+- name: Wait for the reboot to complete
+  wait_for_connection:
+    timeout: 240
+    connect_timeout: 20
+    delay: 5
+    sleep: 5
+  when: need_bootstrap.rc != 0
+
+- name: Store the fact if this is an fedora core os host
+  set_fact:
+    is_fedora_coreos: True
+  tags:
+    - facts

roles/bootstrap-os/tasks/main.yml

@@ -13,14 +13,21 @@
 - include_tasks: bootstrap-clearlinux.yml
   when: '"Clear Linux OS" in os_release.stdout'
 
+- include_tasks: bootstrap-fedora-coreos.yml
+  when: '"ID=fedora" in os_release.stdout and "VARIANT_ID=coreos" in os_release.stdout'
+
 - include_tasks: bootstrap-coreos.yml
-  when: '"CoreOS" in os_release.stdout or "Flatcar" in os_release.stdout'
+  when:
+    - '"CoreOS" in os_release.stdout or "Flatcar" in os_release.stdout'
+    - '"ID=fedora" not in os_release.stdout'
 
 - include_tasks: bootstrap-debian.yml
   when: '"Debian" in os_release.stdout or "Ubuntu" in os_release.stdout'
 
 - include_tasks: bootstrap-fedora.yml
-  when: '"Fedora" in os_release.stdout'
+  when:
+    - '"Fedora" in os_release.stdout'
+    - '"VARIANT_ID=coreos" not in os_release.stdout'
 
 - include_tasks: bootstrap-opensuse.yml
   when: '"openSUSE" in os_release.stdout'
@@ -43,7 +50,7 @@
     name: "{{ inventory_hostname }}"
   when:
     - override_system_hostname
-    - ansible_os_family not in ['Suse', 'Container Linux by CoreOS', 'Flatcar Container Linux by Kinvolk', 'ClearLinux']
+    - ansible_os_family not in ['Suse', 'Container Linux by CoreOS', 'Flatcar Container Linux by Kinvolk', 'ClearLinux'] and not is_fedora_coreos
 
 # (2/3)
 - name: Assign inventory name to unconfigured hostnames (CoreOS, non-Flatcar, Suse and ClearLinux only)
@@ -52,7 +59,7 @@
   changed_when: false
   when:
     - override_system_hostname
-    - ansible_os_family in ['Suse', 'Container Linux by CoreOS', 'Flatcar Container Linux by Kinvolk', 'ClearLinux']
+    - ansible_os_family in ['Suse', 'Container Linux by CoreOS', 'Flatcar Container Linux by Kinvolk', 'ClearLinux'] or is_fedora_coreos
 
 # (3/3)
 - name: Update hostname fact (CoreOS, Flatcar, Suse and ClearLinux only)
@@ -61,7 +68,7 @@
     filter: ansible_hostname
   when:
     - override_system_hostname
-    - ansible_os_family in ['Suse', 'Flatcar Container Linux by Kinvolk', 'Container Linux by CoreOS', 'ClearLinux']
+    - ansible_os_family in ['Suse', 'Flatcar Container Linux by Kinvolk', 'Container Linux by CoreOS', 'ClearLinux'] or is_fedora_coreos
 
 - name: "Install ceph-commmon package"
   package: