Your SD will be dead in a very short time because the CMK/rrdcached does many small write requests to card. It is better to use some alternative with native SATA/SSD support.
As example - if someone is viewing a service from the remote instance and this service has performance data. Every time the display is refreshed the system issues a flush data command to rrdcached to get the latest graph data what leads to a small write to the storage for this graph data.