MongoDB Ops Manager - CPU - No Data Available
Ref:

https://docs.cloudmanager.mongodb.com/tutorial/configure-monitoring-munin-node/

To chart the hardware statistics collected with Munin, Cloud Manager supports the following munin-node plugins:


cpu plugin, which creates the cputime chart.
iostat plugin, which creates the iostat chart.
iostat_ios plugin, which creates the iotime chart.



  You must install the munin-node package on all of the host systems
  that you wish to monitor. Ensure that the Monitoring Agent can connect
  to the munin-node process on port 4949 of the monitored host to
  collect data.