NMC: NMC package successfully installs on Linux Server, but GST Service Cannot be Started "Unit gst.service could not be found."

• You have installed the NMC server package on a Linux system:
• The /opt/lgtonmc/bin/nmc_config script appears to complete (returns to prompt), but the service did not start and cannot be started:

[root@NMCSERVER]# /opt/lgtonmc/bin/nmc_config

The embedded web server inside the NMC server must run as a non-root user.
EMC recommends that you specify a user that has limited privileges and
file access permissions. Default user name used is 'nsrnmc'.

Specify the directory to use for the LGTOnmc database [/nsr/nmc/nmcdb]: 

Do you want to migrate the NMC server data from a previous LGTOnmc 8.x.x release [n]? 

Specify the host name of the NetWorker Authentication Service host [NWSERVER.emclab.local]: 

Start the NMC server daemons at end of the configuration [y]? 

Creating the installation log in /opt/lgtonmc/logs/install.log.

Performing initialization. Please wait...

[root@NMCSERVER ]# service gst status
Redirecting to /bin/systemctl status gst.service
Unit gst.service could not be found.

• The /opt/lgtonmc/logs/install.log shows:

** running: chmod 755 /opt/nsr/admin/gst.service
** running: chmod 755 /opt/nsr/admin/gst_linux.sh
** running: /usr/sbin/semanage permissive -a unconfined_t
/opt/lgtonmc/bin/nmc_config: line 393: /usr/sbin/semanage: No such file or directory

The semanage package is missing from the NMC server. 

This is a Linux OS package: https://linux.die.net/man/8/semanage

1. Install the missing semanage package on the server. You can identify which package installs this tool with:

yum provides /usr/sbin/semanage

[root@NMCSERVER]# yum provides /usr/sbin/semanage
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: ftp.usf.edu
 * extras: mirror.cogentco.com
 * updates: mirror.wdc1.us.leaseweb.net
policycoreutils-python-2.5-34.el7.x86_64 : SELinux policy core python utilities
Repo        : base
Matched from:
Filename    : /usr/sbin/semanage

2. The package can be installed with the following using the package outputted by the above command:

3. Rerun the NMC configuration script: 

/opt/lgtonmc/bin/nmc_config

4. Confirm that services are running after the configuration script completes: 

[root@NMCSERVER ]# service gst status
Redirecting to /bin/systemctl status gst.service
● gst.service - NetWorker Management Console
   Loaded: loaded (/opt/nsr/admin/gst.service; enabled; vendor preset: disabled)
   Active: active (running) since Fri 2021-06-25 11:02:49 EDT; 53s ago
  Process: 9778 ExecStart=/opt/nsr/admin/gst_linux.sh start (code=exited, status=0/SUCCESS)
 Main PID: 9799 (gstd)
   CGroup: /system.slice/gst.service
           ├─9799 /opt/lgtonmc/bin/gstd
           ├─9805 /opt/lgtonmc/apache/bin/httpd -f /opt/lgtonmc/apache/conf/httpd.conf
           ├─9806 /opt/lgtonmc/apache/bin/httpd -f /opt/lgtonmc/apache/conf/httpd.conf
           ├─9821 /opt/lgtonmc/postgres/bin/postgres -D /nsr/nmc/nmcdb/pgdata
           ├─9822 postgres: logger process   
           ├─9824 postgres: checkpointer process   
           ├─9825 postgres: writer process   
           ├─9826 postgres: wal writer process   
           ├─9827 postgres: autovacuum launcher process   
           ├─9828 postgres: stats collector process   
           └─9834 postgres: lgtogst lgto_gst ::1(34866) idle

5. Monitor the /var/log/messages file and /opt/lgtonmc/logs/gstd.raw for any error messages.