Ansible until loop with regex in conditional statement

Question

I need to check command stdout with a regex pattern in until loop. When I using regex_search to display debug msg all works fine:

 - name: Checking if node is ready
 shell: "kubectl --kubeconfig {{kubeconf}} get nodes"
 register: k_output
 - debug:
 msg: "{{k_output.stdout | regex_search(node_hostname | string + '\\s+Ready')}}"

The message is

ok: [any_node_hostname] => {
 "msg": "any_node_hostname Ready"
}

But if I trying to use that construction inside until conditional statement task fails with syntax error.

 - set_fact:
 regexp_pattern: "{{node_hostname | string + '\\s+Ready'}}"
 - debug:
 msg: "{{regexp_pattern}}"
 - name: Checking if node is ready
 shell: "kubectl --kubeconfig {{kubeconf}} get nodes"
 register: k_output
 until: "{{k_output.stdout | regex_search(regexp_pattern)}}" != ""
 retries: 5
 delay: 10

The same behaviour without set_fact when I just copying and pasting full string {{k_output.stdout | regex_search(node_hostname | string + '\\s+Ready')}} to until conditional statement. So, how can I use regex_search or something that fits this case with until?

Answer 1

you have syntax error at until: statement : you must not quote the vars in expression, like in example here : Retrying a task until a condition is met

 until: k_output.stdout | regex_search(regexp_pattern) != ""

I hope this will help