update_ssh_config.yml

# Update the entry in ~/.ssh/config to reflect latest version
---
-   hosts: aspace_instances
    vars:
    pre_tasks:
      - fail: msg='Need to set previous version by adding --extra-vars "previous_version=<previous-version i.e. v2.0.1>" to ansible-playbook call'
        when: previous_version == None
      - debug: var=previous_version
    tasks:
      - debug: var=client_name
      - set_fact:
          old_host_ip: "{{ hostvars[client_name + '-' + previous_version]['ansible_ssh_host'] }}"
      - name: change the IP from previous to current
        replace:
          dest: ~/.ssh/config
          regexp: "{{ old_host_ip }}"
          replace: "{{ ansible_ssh_host }}"
        delegate_to: 127.0.0.1