kubernetes.core.k8s_cp intermittently copying incomplete files to pod

[danfinn]

SUMMARY

Occasionally I've noticed that when using the kubernetes.core.k8s_cp module the file that gets copied is not complete. This isn't happening all the time but it is causing issues for us.

ISSUE TYPE

• Bug Report

COMPONENT NAME

kubernetes.core.k8s_cp

ANSIBLE VERSION

quay.io/ansible/ansible-builder:latest

STEPS TO REPRODUCE

 - name: Copy metricbeat index template to elasticsearch master pod
   kubernetes.core.k8s_cp:
     kubeconfig: "{{ context_file }}"
     context: "{{ aks_name }}"
     namespace: "{{ namespace }}"
     pod: "{{ prefix_type }}-elasticsearch-master-0"
     container: "{{ prefix_type }}-elasticsearch"
     local_path: "{{ role_path }}/files/metricbeat_template.json"
     remote_path: /tmp/metricbeat_template.json
   no_log: "{{ no_log }}"

EXPECTED RESULTS

file to be copied in it's entirety

ACTUAL RESULTS

source file:

wc -l metricbeat_template.json
35766 metricbeat_template.json

file on pod after running above ansible task:

wc -l /tmp/metricbeat_template.json
35225 /tmp/metricbeat_template.json

this doesn't happen every time but I've caught this happening twice now.

re-running the playbook results in the file being copied in it's entirety (from the pod):

wc -l /tmp/metricbeat_template.json
35766 /tmp/metricbeat_template.json

[danfinn]

a discussion with some more information:
https://forum.ansible.com/t/strange-error-when-using-kubernetes-core-k8s-cp-module-in-role/8104/9