Defaults for mcelog in Oracle Linux 7 Prevent Oracle Linux FMA From Working Properly (19731891)

For Oracle Linux FMA to work properly with Oracle Linux 7, the mcelog service must be running in daemon mode only. However, by default, the mcelog service in Oracle Linux 7 runs with arguments: --ignorenodev, --daemon and --foreground. Therefore, before installing Oracle Linux FMA 2.3.1 on a system with Oracle Linux 7 you need to reconfigure the mcelog service.

1. Ensure the mcelog service is installed and running by typing the command:

   systemctl status mcelog

   If mcelog is not installed, you will see:

   [root@testserver16 ~]# systemctl status mcelog
   mcelog.service
      Loaded: not-found (Reason: No such file or directory)
      Active: inactive (dead)

2. If mcelog is not installed, install mcelog using yum by typing the command:

   yum install mcelog

   After successful installation, proceed to the next step.

3. Edit the /etc/mcelog/mcelog.conf file to do the folllowing:

   • Uncomment the "raw=yes" entry.

   • Comment out the existing "memory-ce-threshold" entry and create a new one that reads "memory-ce-threshold = 3 / 72h".

4. If an mcelog file exists that was in the default format, delete it.

   rm /var/log/mcelog

5. Edit the /etc/systemd/system/multi-usr.target.wants/mcelog.service file to change the "[Service]" section from:

   [Service]
   ExecStartPre=/etc/mcelog/mcelog.setup
   ExecStart=/usr/sbin/mcelog --ignorenodev --daemon --foreground
   StandardOutput=syslog

   to:

   [Service]
   Type=forking
   ExecStartPre=/etc/mcelog/mcelog.setup
   ExecStart=/usr/sbin/mcelog --daemon
   StandardOutput=syslog

6. Apply the changes you have made by typing the command:

   systemctl daemon-reload

7. Restart the mcelog service by typing the command:

   systemctl restart mcelog

8. Confirm that mcelog is running in daemon mode by typing the command:

   systemctl status mcelog

   You should see the output similar to:

   [root@testserver16 ~]# systemctl status mcelog
   mcelog.service - Machine Check Exception Logging Daemon
      Loaded: loaded (/usr/lib/systemd/system/mcelog.service; enabled)
      Active: active (running) since Fri 2014-10-03 12:52:13 EDT; 6s ago
     Process: 3939 ExecStart=/usr/sbin/mcelog --daemon (code=exited,
   status=0/SUCCESS)
     Process: 3935 ExecStartPre=/etc/mcelog/mcelog.setup (code=exited,
   status=0/SUCCESS)
    Main PID: 3940 (mcelog)
      CGroup: /system.slice/mcelog.service
                   |__3940 /usr/sbin/mcelog --daemon