Red Hat has a long history of customer choice, and for that reason we include with Red Hat Ceph Storage documentation information on how to use external monitoring tools. Red Hat Ceph Storage’s built-in monitoring tools are designed to help you keep tabs on your clusters' health, performance, and resource usage, while avoiding distributed-systems awareness shortcomings. An under-marketed advantage of distributed systems is that the swapping of failed drives or the replacement of PSUs becomes a scheduled activity, not an emergency one. Most hardware failure reports naturally found in a large enough system are managed weekly or monthly as part of recurring maintenance activity. More urgent events, like the loss of a MON bringing the cluster from HA+1 to HA status, would, however, be mixed in with all the other “red” false alarms and lost in all the noise.ĭistributed systems need monitoring tools that are aware of their distributed nature to ensure that pagers go off only for alerts truly critical in nature. The system can withstand the loss of multiple drives or storage nodes without needing immediate action from an operator, as long as free storage capacity remains available on other nodes. In a somewhat obvious example, Nagios’ Red/Green host (or drive) health status tracking becomes inadequate, as the loss of a drive either generates unnecessary alerts or fails to highlight enough what is likely to be a more urgent condition, like the loss of a MON container. Like its resiliency, Ceph’s ability to scale is another outcome of its distributed architecture.ĭistributed systems' architectures break with the common assumptions made by most traditional monitoring tools in defining the health of an individual device or service. Red Hat Ceph Storage is a highly scalable, fault-tolerant platform for object, block, and file storage that delivers excellent data resiliency (we default to keeping three copies of a customer’s data at all times), with service availability capable of enduring the loss of a single drive, of a cluster node, or even of an entire rack of storage without users experiencing any interruption.
A SAAS solution to monitor your Ceph storage infrastructure By Ilan Rabinovitch (Datadog) and Federico Lucifredi (Red Hat) Monitoring a distributed system
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