Error adding iscsi-gateway-add using HTTPS

Hi all and thanks for reading this to help on my issue

I am running Ceph Nautilus with ceph-iscsi 3.4-1.el7
While running ansible installation i get error on dashboard role trying to add iscsi gateways and same error is returned running the add command from shell

My cluster is configured with wildcard certs for: dashboard, rados gateway, iscsi gateway
Error "Error code: SSL_ERROR_BAD_CERT_DOMAIN" is seen when browsing with Firefox

**SSL verify is disabled**
ceph dashboard set-rgw-api-ssl-verify False
Option RGW_API_SSL_VERIFY updated

**Command**
ceph --cluster ceph dashboard iscsi-gateway-add https://myadmin:admin.01@10.129.1.114:5050

Error EINVAL: iscsi REST API cannot be reached. Please check your configuration and that the API endpoint is accessible

**Ansible error**
```
failed: [cnode01 -> cnode01] (item=cnode05) => changed=false
ansible_loop_var: item
cmd:
- ceph
- --cluster
- ceph
- dashboard
- iscsi-gateway-add
- https://myadmin:admin.01@10.129.1.114:5050
delta: '0:00:00.829076'
end: '2020-03-30 10:28:19.305049'
invocation:
module_args:
_raw_params: ' ceph --cluster ceph dashboard iscsi-gateway-add https://myadmin:admin.01@10.129.1.114:5050'
_uses_shell: false
argv: null
chdir: null
creates: null
executable: null
removes: null
stdin: null
stdin_add_newline: true
strip_empty_ends: true
warn: true
item: cnode05
msg: non-zero return code
rc: 22
start: '2020-03-30 10:28:18.475973'
stderr: 'Error EINVAL: iscsi REST API cannot be reached. Please check your configuration and that the API endpoint is accessible'
stderr_lines:
stdout: ''
stdout_lines:

```

**Iscsi gateway cfg**
Dir has certificates files in place

**/etc/ceph/iscsi-gateway.cfg" 23L, 977C**
```
# Ansible managed
[config]
api_password = admin.01
api_port = 5050
# API settings.
# The API supports a number of options that allow you to tailor it to your
# local environment. If you want to run the API under https, you will need to
# create cert/key files that are compatible for each iSCSI gateway node, that is
# not locked to a specific node. SSL cert and key files *must* be called
# 'iscsi-gateway.crt' and 'iscsi-gateway.key' and placed in the
'/etc/ceph/' directory
# on *each* gateway node. With the SSL files in place, you can use 'api_secure =
true'
# to switch to https mode.
# To support the API, the bear minimum settings are:
api_secure = True
# Optional settings related to the CLI/API service
api_user = myadmin
cluster_name = ceph
loop_delay = 1
trusted_ip_list = 10.129.1.114,10.129.1.113
```

**Some tests**

```
[root@cnode05 /]# curl --insecure --user myadmin:admin.01 -X GET https://10.129.1.114:5050/api/config
{
"created": "2020/03/26 19:02:10",
"discovery_auth": {
"mutual_password": "",
"mutual_password_encryption_enabled": false,
"mutual_username": "",
"password": "",
"password_encryption_enabled": false,
"username": ""
},
"disks": {},
"epoch": 0,
"gateways": {},
"targets": {},
"updated": "",
"version": 11
}[root@cnode05 /]# curl --insecure --user myadmin:admin.01 -X GET https://10.129.1.114:5050/api/_ping
{
"message": "pong"
}[root@cnode05 /]# curl --insecure --user myadmin:admin.01 -X GET https://10.129.1.114:5050/api/sysinfo/ip_addresses
{
"data": [
"172.17.0.1",
"10.129.1.114",
"10.10.16.114"
]
```

Reproduce the failure with the shown ceph dashboard iscsi-gateway-add command and compare it with the successful curl --insecure requests to /api/config, /api/_ping, and /api/sysinfo/ip_addresses. Trace the HTTPS certificate verification path for the iSCSI gateway endpoint and the dashboard role; done means the gateway can be added over HTTPS while preserving certificate verification behavior.

Written by the indexing model from the issue text.