Are you using proxy?
Check that all hosts can discover and login with the same parameters you set in 
oVirt.

Best Regards,
Strahil Nikolov

На 17 юни 2020 г. 11:32:49 GMT+03:00, Ricardo Alonso <[email protected]> 
написа:
>Trying to connect to a an iSCSI target (no chap/secrets) is failing
>with the message: 
>
>2020-06-17 05:25:40,050-0300 ERROR ansible failed {
>    "ansible_host": "localhost",
>"ansible_playbook":
>"/usr/share/ovirt-hosted-engine-setup/ansible/trigger_role.yml",
>    "ansible_result": {
>        "_ansible_no_log": false,
>        "changed": false,
>        "connection": "close",
>"content": "{\n  \"detail\" : \"For correct usage, see:
>https://ovirt.<removed>/ovirt-engine/apidoc#services/host/methods/iscsi_discover\",\n
> \"reason\" : \"Request syntactically incorrect.\"\n}",
>        "content_encoding": "identity",
>        "content_type": "application/json",
>        "correlation_id": "a5ba94a7-b22b-4ed6-9a47-87a87186c341",
>        "date": "Wed, 17 Jun 2020 08:25:38 GMT",
>        "elapsed": 0,
>        "invocation": {
>            "module_args": {
>                "attributes": null,
>                "backup": null,
>"body": "{\"iscsi\": {\"address\": \"192.168.6.1\", \"port\":
>\"3260,3260\", \"username\": null, \"password\": \"\"}}",
>                "body_format": "json",
>                "client_cert": null,
>                "client_key": null,
>                "content": null,
>                "creates": null,
>                "delimiter": null,
>                "dest": null,
>                "directory_mode": null,
>                "follow": false,
>                "follow_redirects": "safe",
>                "force": false,
>                "force_basic_auth": false,
>                "group": null,
>                "headers": {
>                    "Accept": "application/json",
>                 "Authorization": "Basic YWRtaW5AaW50ZXJuYWw6cGQyMDAx",
>                    "Content-Type": "application/json"
>                },
>                "http_agent": "ansible-httpget",
>                "method": "POST",
>                "mode": null,
>                "owner": null,
>                "regexp": null,
>                "remote_src": null,
>                "removes": null,
>                "return_content": true,
>                "selevel": null,
>                "serole": null,
>                "setype": null,
>                "seuser": null,
>                "src": null,
>                "status_code": [
>                    "200"
>                ],
>                "timeout": 30,
>                "unix_socket": null,
>                "unsafe_writes": null,
>"url":
>"https://ovirt.<removed>/ovirt-engine/api/hosts/2c173b7f-9f9e-4046-890a-ab16d1babc35/iscsidiscover",
>                "url_password": null,
>                "url_username": null,
>                "use_proxy": true,
>                "validate_certs": false
>            }
>        },
>        "json": {
>"detail": "For correct usage, see:
>https://ovirt.<removed>/ovirt-engine/apidoc#services/host/methods/iscsi_discover",
>            "reason": "Request syntactically incorrect."
>        },
>"msg": "Status code was 400 and not [200]: HTTP Error 400: Bad
>Request",
>        "redirected": false,
>"server": "Apache/2.4.37 (centos) OpenSSL/1.1.1c mod_wsgi/4.6.4
>Python/3.6",
>        "status": 400,
>        "transfer_encoding": "chunked",
>"url":
>"https://ovirt.<removed>/ovirt-engine/api/hosts/2c173b7f-9f9e-4046-890a-ab16d1babc35/iscsidiscover"
>    },
>    "ansible_task": "iSCSI discover with REST API",
>    "ansible_type": "task",
>    "status": "FAILED",
>    "task_duration": 4
>}
>
>I found this old bug, but doesn't seams to have a resolution. Any
>clue/tips? 
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