Openstack Object Storage won’t be of much use if it can’t access the hard drives where our data is stored; so being able to detect and replace failed hard drives is essential. OpenStack Object Storage can be configured to detect hard drive failures with the swift- drive-audit command. This will allow us to detect failures so that we can replace the failed hard drive which is essential to the system health and performance.
Log in to an OpenStack Object Storage node as well as the Proxy Server.
To detect a failing hard drive, carry out the following:
Without swift-drive -audit taking care of this automatically, you should need act manually to ensure that the disk has been dismounted and removed from the ring.
Detection of failed hard drives can be picked up automatically by the swift- drive-audit tool, which we set up as a cron job to run hourly. With this in place, it detects failures, unmounts the drive so it cannot be used, and updates the ring, so that data isn’t being stored or replicated to it.
Once the drive has been removed from the rings, we can run maintenance on that device and replace the drive.
With a new drive in place, we can then put the device back in service on the storage node by adding it back into the rings. We can then rebalance the rings by running the swift-ring-builder commands.
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