Monitoring Ceph
The Ceph sensor is automatically deployed and installed after you install the Instana agent.
Supported versions
The currently supported versions are:
- Pacific (16)
- Octopus (15)
- Nautilus (14)
- Mimic (13)
- Luminous (12)
- Kraken (11)
Configuration
To enable in depth metric monitoring, the Agent requires the Ceph executable path. You can configure it here <agent_install_dir>/etc/instana/configuration.yaml:
com.instana.plugin.ceph:
ceph-executable-path: '' # default path is /usr/bin/ceph
Metrics collection
To view the metrics, select Infrastructure in the sidebar of the Instana User interface, click a specific monitored host, and then you can see a host dashboard with all the collected metrics and monitored processes.
Configuration data
The configuration data includes:
- File System ID (fsid) - unique identifier for the cluster
- Cluster name
- Version
- Overall cluster status
- Pools
Performance metrics
Cluster
| Metric | Description |
|---|---|
| Commit latency | Time taken to commit an operation to the journal (shown as milliseconds) |
| Apply latency | Time taken to flush an update to disks (shown as milliseconds) |
| All OSDs | Number of known storage daemons |
| Up OSDs | Amount of messages that have been acknowledged on all queues |
| In OSDs | Number of online storage daemons |
| Near full OSDs | Number of nearly full osds |
| Full OSDs | Number of full osds |
| All monitors | Number of monitor daemons |
| Healthy monitors | Number of healthy monitor daemons |
| Read bps | Bytes/second being read |
| Write bps | Bytes/second being written |
| Read ops | Read operations per second for given pool |
| Write ops | Write operations per second for given pool |
| Capacity usage | Overall cluster capacity usage |
| All pools | Number of pools |
| All objects | Number of objects |
| All pgs | Number of all placement groups |
| Active+Clean pgs | Number of active+clean placement groups |
Pool
| Metric | Description |
|---|---|
| Capacity usage | Overall cluster capacity usage for a given pool |
| All objects | Number of objects for a given pool |
| Read bytes | Per-pool read bytes |
| Write bytes | Per-pool write bytes |
| Read bps | Bytes/second being read for given pool |
| Write bps | Bytes/second being written for given pool |
| Read ops | Read operations per second for given pool |
| Write ops | Write operations per second for given pool |
Health Signatures
For each sensor, there is a curated knowledgebase of health signatures that are evaluated continuously against the incoming metrics and are used to raise issues or incidents depending on user impact.
Built-in events trigger issues or incidents based on failing health signatures on entities, and custom events trigger issues or incidents based on the thresholds of an individual metric of any given entity.
For information about built-events for the Ceph sensor, see the Built-in events reference.