variable inside regex_search inside a variable :)

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1

Hello,

after hours of struggle with Ansible I’ve decided to ask for help smarter people. What I’m trying to do is to remove (lets say just do ls -la for now all files and directories within certain locations which names are not containing any part of certain list of variables. Let me give you an example:

`

  • name: List currently existing letsencrypt certificates
    find:
    paths={{ item.paths }}
    file_type={{ item.file_type }}
    register: haproxy_le_existing
    with_items:

  • { paths: /etc/letsencrypt/live/, file_type: directory}

  • { paths: /etc/haproxy/ssl/le/, file_type: file}

  • debug: var=‘haproxy_le_ssl|map(attribute=“domain”)|list|join(“|”)’

  • debug: var=‘haproxy_le_existing.results|sum(attribute=‘files’, start=)|map(attribute=‘path’)|map(‘regex_search’,’^((?!{{haproxy_le_ssl|map(attribute=‘domain’)|list|join(‘|’)}}).)*$‘)| select(‘string’) | list’

  • name: Remove SSLs that are not in the config
    shell: “ls -la {{ item }}”
    with_items: “{{ haproxy_le_existing.results|sum(attribute=‘files’, start=)|map(attribute=‘path’)|map(‘regex_search’,‘^((?!{{haproxy_le_ssl|map(attribute=‘domain’)|list|join(’|‘)}}).)*$’)| select(‘string’) | list }}”
    `

variables are here:

`
haproxy_le_ssl:

  • { domain: let2.example.is}
  • { domain: let3.example.is}
  • { domain: let4.example.is}
    `

Debug works perfectly:

`
TASK [common/haproxy : List currently existing letsencrypt certificates] *******
ok: [haproxy-test.aws.example] => (item={u’file_type’: u’directory’, u’paths’: u’/etc/letsencrypt/live/‘})
ok: [haproxy-test.aws.example] => (item={u’file_type’: u’file’, u’paths’: u’/etc/haproxy/ssl/le/'})

msg: All items completed

msg: All items completed

TASK [common/haproxy : debug] **************************************************
ok: [haproxy-test.aws.example] => {
“haproxy_le_ssl|map(attribute="domain")|list|join("|")”: “let2.example.is|let3.example.is|let4.example.is”
}

TASK [common/haproxy : debug] **************************************************
ok: [haproxy-test.aws.example] => {
“haproxy_le_existing.results|sum(attribute=‘files’, start=)|map(attribute=‘path’)|map(‘regex_search’,‘^((?!let2.example.is|let3.example.is|let4.example.is).)*$’)| select(‘string’) | list”: [
“/etc/letsencrypt/live/let1.example.is”,
“/etc/haproxy/ssl/le/dupa.pem”
]
}
`

most probably because it doesn’t have “{{ }}”, but when it comes to running a task I’ve got following error:

TASK [common/haproxy : Remove SSLs that are not in the config] ***************** fatal: [haproxy-test.aws.example]: FAILED! => {"failed": true, "msg": "template error while templating string: expected token ',', got 'domain'. String: {{ haproxy_le_existing.results|sum(attribute='files', start=[])|map(attribute='path')|map('regex_search','^((?!{{haproxy_le_ssl|map(attribute='domain')|list|join('|')}}).)*$')| select('string') | list }}"}

For me creating oneliner like this is more convenient than creating multiple tasks (most probably I could create something using join from multiple tasks, but I’d like to understand what is happening here as using variable inside regex seems to be quite handy and I might use it in the future), even it is not the easiest to read way of doing the job. Please advice what could I do in this situation.

2

Hi,

Any chance you managed to work out as i’m exactly in the same point and boy it drives me crazy…

Cheers

3

I’m working in a similar task and what worked for me was this trick :

  1. create a variable :
    vars:
    prefix=“192”
  • name: Make the regexp variable

set_fact: term=“^{{prefix}}.*”

  1. use the “prepared variable”
  • name: Get ip4 address of the server
    set_fact: matches=“{{ ansible_all_ipv4_addresses|map(‘regex_search’, (term) )|list|difference(empty)}}”
    failed_when: matches | count > 1