Add iproute(2) package checking (#11816)

Signed-off-by: ekko <lihai.tu@daocloud.io>

roles/bootstrap-os/tasks/rhel.yml

@@ -100,3 +100,14 @@
     name: "{{ ((ansible_distribution_major_version | int) < 8) | ternary('libselinux-python', 'python3-libselinux') }}"
     state: present
   become: true
+
+# iproute is required for networking related facts gathering
+# See https://docs.ansible.com/ansible/latest/playbook_guide/playbooks_vars_facts.html#package-requirements-for-fact-gathering
+# Note: It is not recommended way, but since the tasks execution order, put it here is the simplest way so far. We can move it to a proper place later.
+# TODO: move this to roles/kubernetes/preinstall/vars/main.yml -> pkgs variables
+# Currently not possible because the collect the network facts before that step, needs reordering of the exec flow.
+- name: Ensure iproute is installed
+  package:
+    name: iproute
+    state: present
+  become: true