---
- name: Set Fact - k3s_node_ip
  set_fact:
    k3s_node_ip: '{{ ansible_facts[flannel_iface]["ipv4"]["address"] }}'

- name: Set Fact - server_init_args trim \n
  set_fact:
    server_init_args: "{{ server_init_args | regex_replace('\n', '') }}"

- name: Import Initial Master Node Tasks
  include_tasks: init_master.yml
  when: ansible_hostname == hostvars[groups['master'][0]]['ansible_hostname']

- name: Run init
  shell: curl -sfL https://get.k3s.io | sh -s - server {{ server_init_args }}
...