Format list of strings fact when using Ansible

Question

I have a "fact" in my Ansible provisionig similar to below

---
- name: Get disks
  set_fact: lvm_disks_present="{{hostvars[inventory_hostname]["ansible_devices"].keys()|list}}"

When I "debug" this it shows

ok: [proxy] => (item=lvm_disks_present: [u'sdc', u'sdb', u'sda', u'dm-0', u'dm-1']) => {
    "ansible_loop_var": "item", 
    "item": "lvm_disks_present: [u'sdc', u'sdb', u'sda', u'dm-0', u'dm-1']"
}

I want to append each item with /dev/ and turn it into

[u'/dev/sdc', u'/dev/sdb', u'/dev/sda', u'/dev/dm-0', u'/dev/dm-1']

How can I do that?

Vladimir Botka · Accepted Answer · 2019-09-20 09:17:28Z

1

Q: I want to append each item with /dev/ and turn it into

[u'/dev/sdc', u'/dev/sdb', u'/dev/sda', u'/dev/dm-0', u'/dev/dm-1']

A: Use map and regex_replace. For example

- set_fact:
    lvm_disks: "{{ hostvars[inventory_hostname]['ansible_devices'].keys()|
                   list|
                   map('regex_replace', '(.*)', '/dev/\\1')|
                   list }}"

edited Sep 20, 2019 at 9:17

answered Sep 20, 2019 at 9:09

Vladimir Botka

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