After you have installed ONTAP Mediator service, you might want to change the user name or password. You can also uninstall the ONTAP Mediator Service.

Change the user name

About these tasks

These task is performed on the Linux host on which the ONTAP Mediator service is installed.

If you are unable to reach this command, you might need to run the command using the full path as shown in the following example:

/usr/local/bin/mediator_username

Procedure

Change the username by choosing one of the following options:

Run the command mediator_change_user and respond to the prompts as shown in the following example:

 [root@mediator-host ~]# mediator_change_user
 Modify the Mediator API username by entering the following values:
     Mediator API User Name: mediatoradmin
                   Password:
 New Mediator API User Name: mediator
 The account username has been modified successfully.
 [root@mediator-host ~]#

Run the following command:

MEDIATOR_USERNAME=mediator MEDIATOR_PASSWORD=mediator2 MEDIATOR_NEW_USERNAME=mediatoradmin mediator_change_user

 [root@mediator-host ~]# MEDIATOR_USERNAME= mediator MEDIATOR_PASSWORD='mediator2' MEDIATOR_NEW_USERNAME= mediatoradmin mediator_change_user
 The account username has been modified successfully.
 [root@mediator-host ~]#

Change the password

About this task

This task is performed on the Linux host on which the ONTAP Mediator service is installed.

If you are unable to reach this command, you might need to run the command using the full path as shown in the following example:

/usr/local/bin/mediator_change_password

Procedure

Change the password by choosing one of the following options:

Run the mediator_change_password command and respond to the prompts as shown in the following example:

 [root@mediator-host ~]# mediator_change_password
 Change the Mediator API password by entering the following values:
    Mediator API User Name: mediatoradmin
              Old Password:
              New Password:
          Confirm Password:
 The password has been updated successfully.
 [root@mediator-host ~]#

Run the following command:

MEDIATOR_USERNAME= mediatoradmin MEDIATOR_PASSWORD=mediator1 MEDIATOR_NEW_PASSWORD=mediator2 mediator_change_password

The example shows that the password is changed from "mediator1" to "mediator2".
```
 [root@mediator-host ~]# MEDIATOR_USERNAME=mediatoradmin MEDIATOR_PASSWORD=mediator1 MEDIATOR_NEW_PASSWORD=mediator2 mediator_change_password
 The password has been updated successfully.
 [root@mediator-host ~]#
```

Stop the ONTAP Mediator service

To stop the ONTAP Mediator service, perform the following steps:

Steps

Stop the ONTAP Mediator.

systemctl stop ontap_mediator
Stop SCST.

systemctl stop mediator-scst
Disable the ONTAP Mediator and SCST.

systemctl diable ontap_mediator mediator-scst

Re-enable the ONTAP Mediator service

To re-enable the ONTAP Mediator service, perform the following steps:

Steps

Enable the ONTAP Mediator and SCST.

systemctl enable ontap_mediator mediator-scst
Start SCST.

systemctl start mediator-scst
Start ONTAP Mediator.

systemctl start ontap_mediator

Verify the ONTAP Mediator is healthy

After the ONTAP Mediator has been installed, you should verify that the ONTAP Mediator services are running.

Steps

View the status of the ONTAP Mediator services:

systemctl status ontap_mediator

[root@scspr1915530002 ~]# systemctl status ontap_mediator

 ontap_mediator.service - ONTAP Mediator
Loaded: loaded (/etc/systemd/system/ontap_mediator.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2022-04-18 10:41:49 EDT; 1 weeks 0 days ago
Process: 286710 ExecStop=/bin/kill -s INT $MAINPID (code=exited, status=0/SUCCESS)
Main PID: 286712 (uwsgi)
Status: "uWSGI is ready"
Tasks: 3 (limit: 49473)
Memory: 139.2M
CGroup: /system.slice/ontap_mediator.service
      ├─286712 /opt/netapp/lib/ontap_mediator/pyenv/bin/uwsgi --ini /opt/netapp/lib/ontap_mediator/uwsgi/ontap_mediator.ini
      ├─286716 /opt/netapp/lib/ontap_mediator/pyenv/bin/uwsgi --ini /opt/netapp/lib/ontap_mediator/uwsgi/ontap_mediator.ini
      └─286717 /opt/netapp/lib/ontap_mediator/pyenv/bin/uwsgi --ini /opt/netapp/lib/ontap_mediator/uwsgi/ontap_mediator.ini

[root@scspr1915530002 ~]#

systemctl status mediator-scst

[root@scspr1915530002 ~]# systemctl status mediator-scst
   Loaded: loaded (/etc/systemd/system/mediator-scst.service; enabled; vendor preset: disabled)
   Active: active (running) since Mon 2022-04-18 10:41:47 EDT; 1 weeks 0 days ago
  Process: 286595 ExecStart=/etc/init.d/scst start (code=exited, status=0/SUCCESS)
 Main PID: 286662 (iscsi-scstd)
    Tasks: 1 (limit: 49473)
   Memory: 1.2M
   CGroup: /system.slice/mediator-scst.service
           └─286662 /usr/local/sbin/iscsi-scstd

[root@scspr1915530002 ~]#

Confirm the ports that are used by the ONTAP Mediator service:

netstat

[root@scspr1905507001 ~]# netstat -anlt | grep -E '3260|31784'

         tcp   0   0 0.0.0.0:31784   0.0.0.0:*      LISTEN

         tcp   0   0 0.0.0.0:3260    0.0.0.0:*      LISTEN

         tcp6  0   0 :::3260         :::*           LISTEN

Manually uninstall SCST to perform host maintenance

To uninstall SCST, you need the SCST tar bundle that is used for the installed version of ONTAP Mediator.

Steps

Download the appropriate SCST bundle (as shown in the following table) and untar it.

For this version …	Use this tar bundle…
ONTAP Mediator 1.7	scst-3.7.0.tar.bz2
ONTAP Mediator 1.6	scst-3.7.0.tar.bz2
ONTAP Mediator 1.5	scst-3.6.0.tar.bz2
ONTAP Mediator 1.4	scst-3.6.0.tar.bz2
ONTAP Mediator 1.3	scst-3.5.0.tar.bz2
ONTAP Mediator 1.1	scst-3.4.0.tar.bz2
ONTAP Mediator 1.0	scst-3.3.0.tar.bz2

For this version …

Use this tar bundle…

ONTAP Mediator 1.7

scst-3.7.0.tar.bz2

ONTAP Mediator 1.6

scst-3.7.0.tar.bz2

ONTAP Mediator 1.5

scst-3.6.0.tar.bz2

ONTAP Mediator 1.4

scst-3.6.0.tar.bz2

ONTAP Mediator 1.3

scst-3.5.0.tar.bz2

ONTAP Mediator 1.1

scst-3.4.0.tar.bz2

ONTAP Mediator 1.0

scst-3.3.0.tar.bz2

Issue the following commands in the "scst" directory:
1. systemctl stop mediator-scst
2. make scstadm_uninstall
3. make iscsi_uninstall
4. make usr_uninstall
5. make scst_uninstall
6. depmod

Manually install SCST to perform host maintenance

To manually install SCST, you need the SCST tar bundle that is used for the installed version of ONTAP Mediator (see the table above).

Issue the following commands in the "scst" directory:
1. make 2release
2. make scst_install
3. make usr_install
4. make iscsi_install
5. make scstadm_install
6. depmod
7. cp scst/src/certs/scst_module_key.der /opt/netapp/lib/ontap_mediator/ontap_mediator/SCST_mod_keys/.
8. cp scst/src/certs/scst_module_key.der /opt/netapp/lib/ontap_mediator/ontap_mediator/SCST_mod_keys/.
9. patch /etc/init.d/scst < /opt/netapp/lib/ontap_mediator/systemd/scst.patch
(Optional) If Secure Boot is enabled, before you reboot, perform the following steps:
1. Determine each file name for "scst_vdisk", "scst", and "iscsi_scst" modules.
  [root@localhost ~]# modinfo -n scst_vdisk [root@localhost ~]# modinfo -n scst [root@localhost ~]# modinfo -n iscsi_scst
2. Determine the kernel release.
  [root@localhost ~]# uname -r
3. Sign each file with the kernel.
  [root@localhost ~]# /usr/src/kernels/<KERNEL-RELEASE>/scripts/sign-file \sha256 \ /opt/netapp/lib/ontap_mediator/ontap_mediator/SCST_mod_keys/scst_module_key.priv \ /opt/netapp/lib/ontap_mediator/ontap_mediator/SCST_mod_keys/scst_module_key.der \ _module-filename_
4. Install the correct key with the UEFI firmware.
  
  Instructions for installing the UEFI key are located at:
  
  /opt/netapp/lib/ontap_mediator/ontap_mediator/SCST_mod_keys/README.module-signing
  
  The generated UEFI key is located at:
  
  /opt/netapp/lib/ontap_mediator/ontap_mediator/SCST_mod_keys/scst_module_key.der
Perform a reboot.

reboot

Uninstall the ONTAP Mediator service

Before you begin

If necessary, you can remove the ONTAP Mediator service. The Mediator must be disconnected from ONTAP before you remove the Mediator service.

About this task

This task is performed on the Linux host on which the ONTAP Mediator service is installed.

If you are unable to reach this command, you might need to run the command using the full path as shown in the following example:

/usr/local/bin/uninstall_ontap_mediator

Step

Uninstall the ONTAP Mediator service:

uninstall_ontap_mediator

 [root@mediator-host ~]# uninstall_ontap_mediator

 ONTAP Mediator: Self Extracting Uninstaller

 + Removing ONTAP Mediator. (Log: /tmp/ontap_mediator.GmRGdA/uninstall_ontap_mediator/remove.log)
 + Remove successful.
 [root@mediator-host ~]#

Regenerate a temporary self-signed certificate

About this task

You perform this task on the Linux host on which the ONTAP Mediator service is installed.
You can perform this task only if the generated self-signed certificates have become obsolete due to changes to the hostname or IP address of the host after installing the ONTAP Mediator.
After the temporary self-signed certificate has been replaced by a trusted third-party certificate, you do not use this task to regenerate a certificate. The absence of a self-signed certificate will cause this procedure to fail.

Step

To regenerate a new temporary self-signed certificate for the current host, perform the following step:

Restart the ONTAP Mediator:

./make_self_signed_certs.sh overwrite

[root@xyz000123456 ~]# cd /opt/netapp/lib/ontap_mediator/ontap_mediator/server_config
[root@xyz000123456 server_config]# ./make_self_signed_certs.sh overwrite

Adding Subject Alternative Names to the self-signed server certificate
#
# OpenSSL example configuration file.
Generating self-signed certificates
Generating RSA private key, 4096 bit long modulus (2 primes)
..................................................................................................................................................................++++
........................................................++++
e is 65537 (0x010001)
Generating a RSA private key
................................................++++
.............................................................................................................................................++++
writing new private key to 'ontap_mediator_server.key'
-----
Signature ok
subject=C = US, ST = California, L = San Jose, O = "NetApp, Inc.", OU = ONTAP Core Software, CN = ONTAP Mediator, emailAddress = support@netapp.com
Getting CA Private Key