Add plain_http parameter to helm, helm_pull and helm_template (#934)

SUMMARY

This change introduces the plain_http parameter to modules that can interact with OCI registries. This in needed in cases where the OCI registry does not use SSL encryption, forcing Helm to send HTTP requests instead of HTTPS

ISSUE TYPE


Feature Pull Request

COMPONENT NAME

helm, helm_pull and helm_template
ADDITIONAL INFORMATION


This is the output when trying to use an OCI registry that is not configured to use SSL certs.

fatal: [localhost]: FAILED! => {"changed": false, "command": "/usr/local/bin/helm show chart 'oci://<http-registry>/charts/foo'", "msg": "Failure when executing Helm command. Exited 1.\nstdout: \nstderr: Error: Get \"https://<http-registry>/v2/charts/foo/tags/list\": http: server gave HTTP response to HTTPS client\n", "stderr": "Error: Get \"https://<http-registry>/v2/charts/foo/tags/list\": http: server gave HTTP response to HTTPS client\n", "stderr_lines": ["Error: Get \"https://<http-registry>/v2/charts/foo/tags/list\": http: server gave HTTP response to HTTPS client"], "stdout": "", "stdout_lines": []}

Reviewed-by: Bikouo Aubin
Reviewed-by: Matteo Danelon

docs/kubernetes.core.helm_pull_module.rst

@@ -336,6 +336,26 @@ Parameters
                         <div>location of public keys used for verification.</div>
                 </td>
             </tr>
+            <tr>
+              <td colspan="2">
+                  <div class="ansibleOptionAnchor" id="parameter-"></div>
+                  <b>plain_http</b>
+                  <a class="ansibleOptionLink" href="#parameter-" title="Permalink to this option"></a>
+                  <div style="font-size: small">
+                      <span style="color: purple">boolean</span>
+                  </div>
+                  <div style="font-style: italic; font-size: small; color: darkgreen">added in 5.1.0</div>
+              </td>
+              <td>
+                      <ul style="margin: 0; padding: 0"><b>Choices:</b>
+                                  <li><div style="color: blue"><b>no</b>&nbsp;&larr;</div></li>
+                                  <li>yes</li>
+                      </ul>
+              </td>
+              <td>
+                      <div>Use HTTP instead of HTTPS when working with OCI registries</div>
+              </td>
+            </tr>
     </table>
     <br/>