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In this article, I will guide you to create read-only user in VMware vCenter 6.7. Currently, many companies use VMware ESXi as their internal virtualization platform.
The need to create a user with read-only rights in vCenter will usually be used to monitor the system.
Create user monitor on vCenter
Why do you need to do this, if you want to monitor your company’s VMware system; You don’t want to use vCenter’s admin user to monitor, right?
You need a user who only has read-only rights in vCenter, not admin rights.
Create user monitor in vCenter
To create a user for monitoring, on vCenter, go to menu Administrator -> Users and Groups.
At the Users tab, you create a new user, for example in the demo I named it monitor.

Create a group for user monitor
Next step, you need to create a group for user monitor. If you do not do this step, you may encounter the error below.
Unable to login because you do not have permission on any vCenter Server systems connected to this clientThe cause of the above error is because the user monitor does not belong to any system group in vCenter.
To create a new group, also at the Users and Groups menu, switch to the Groups tab and click create a new group (for example, I named it MonitorVcenter).
Then, you add user monitor to this group.

Assign read-only permission to user monitor
Now comes the step of assigning read-only rights to the monitor user. You need this user to only have the right to read information from vCenter and not have the right to operate the system on vCenter.
At the Administrator menu, scroll to the top of the Global Permissions section. Then, press the plus button (+) and add a user monitor with Read-only permission as shown below.

Now, you can open your browser and try to login to vCenter with the read-only user monitor you just created above. You will want to make sure that this user cannot do anything on the system, including console access to the virtual machine.
Conclusion
Actually, creating a read-only user in vCenter is not too difficult. However, in cases where it is necessary to use it (such as a monitor), you will also have to know how to create a read-only user. For those who rarely work with VMware ESXi, you may have a little difficulty doing it.