Some Ansible to show what's next in a serial play

whatsnext.yaml

---
- name: try a thing
  hosts: _cab*
  ignore_unreachable: true
  gather_facts: false
  connection: local
  serial: 2

  tasks:
    - name: what host am I
      debug:
        var: inventory_hostname
      run_once: true

    - name: what hosts are in this batch
      debug:
        var: ansible_play_batch
      run_once: true

    - name: remaining hosts in this play
      debug:
        var: ansible_play_hosts[ansible_play_hosts.index(ansible_play_batch[-1])+1:] |length
      run_once: true

    - name: which hosts are next
      debug:
        msg: Next hosts are {{ ansible_play_hosts[ansible_play_hosts.index(ansible_play_batch[-1])+1:ansible_play_hosts.index(ansible_play_batch[-1])+3] }}
      run_once: true



And here is what it shows:

> pipenv run ansible-playbook -i sites-api-inventory whatsnext.yaml --limit am4-ams

PLAY [try a thing] ********************************************************************************************************************************************

TASK [what host am I] *****************************************************************************************************************************************
ok: [dce-gpanel-1bqb0q2.am4-ams.github.net] => {
    "inventory_hostname": "dce-gpanel-1bqb0q2.am4-ams.github.net"
}

TASK [what hosts are in this batch] ***************************************************************************************************************************
ok: [dce-gpanel-1bqb0q2.am4-ams.github.net] => {
    "ansible_play_batch": [
        "dce-gpanel-1bqb0q2.am4-ams.github.net",
        "dce-gpanel-1brlrp2.am4-ams.github.net"
    ]
}

TASK [remaining hosts in this play] ***************************************************************************************************************************
ok: [dce-gpanel-1bqb0q2.am4-ams.github.net] => {
    "ansible_play_hosts[ansible_play_hosts.index(ansible_play_batch[-1])+1:] |length": "139"
}

TASK [which hosts are next] ***********************************************************************************************************************************
ok: [dce-gpanel-1bqb0q2.am4-ams.github.net] => {
    "msg": "Next hosts are ['dce-gc2-061e152.am4-ams.github.net', 'db-mysql-a8d24fd.am4-ams.github.net']"
}

PLAY [try a thing] ********************************************************************************************************************************************

TASK [what host am I] *****************************************************************************************************************************************
ok: [dce-gc2-061e152.am4-ams.github.net] => {
    "inventory_hostname": "dce-gc2-061e152.am4-ams.github.net"
}

TASK [what hosts are in this batch] ***************************************************************************************************************************
ok: [dce-gc2-061e152.am4-ams.github.net] => {
    "ansible_play_batch": [
        "dce-gc2-061e152.am4-ams.github.net",
        "db-mysql-a8d24fd.am4-ams.github.net"
    ]
}

TASK [remaining hosts in this play] ***************************************************************************************************************************
ok: [dce-gc2-061e152.am4-ams.github.net] => {
    "ansible_play_hosts[ansible_play_hosts.index(ansible_play_batch[-1])+1:] |length": "137"
}

TASK [which hosts are next] ***********************************************************************************************************************************
ok: [dce-gc2-061e152.am4-ams.github.net] => {
    "msg": "Next hosts are ['dce-gc2-24debc9.am4-ams.github.net', 'dce-gc2-c9bd2ad.am4-ams.github.net']"
}

PLAY [try a thing] ********************************************************************************************************************************************

TASK [what host am I] *****************************************************************************************************************************************
ok: [dce-gc2-24debc9.am4-ams.github.net] => {
    "inventory_hostname": "dce-gc2-24debc9.am4-ams.github.net"
}

TASK [what hosts are in this batch] ***************************************************************************************************************************
ok: [dce-gc2-24debc9.am4-ams.github.net] => {
    "ansible_play_batch": [
        "dce-gc2-24debc9.am4-ams.github.net",
        "dce-gc2-c9bd2ad.am4-ams.github.net"
    ]
}

TASK [remaining hosts in this play] ***************************************************************************************************************************
ok: [dce-gc2-24debc9.am4-ams.github.net] => {
    "ansible_play_hosts[ansible_play_hosts.index(ansible_play_batch[-1])+1:] |length": "135"
}

TASK [which hosts are next] ***********************************************************************************************************************************
ok: [dce-gc2-24debc9.am4-ams.github.net] => {
    "msg": "Next hosts are ['metrics-surveyor-8e46c28.am4-ams.github.net', 'glb-director-4c1f0cf.am4-ams.github.net']"
}