Monitoring the current run state
To monitor the current run state of the Cloud Extension, review the Velostrata Cloud Extension portlet added to the Datacenter Summary page. If the Cloud Extension status is Impaired, it cannot be used to run new VMs in Velostrata.
If a Cloud Extension appears impaired due to a Google Cloud host health issue, stopping and starting the Cloud Extension may fix the issue as affected instances are restarted on a healthy host. If the status is still impaired after restarting, follow the procedure at Repairing a Cloud Extension.
Monitoring performance and operational statistics
To monitor performance and operational statistics for the Cloud Extension, click your datacenter and then use the Monitor > Velostrata Service tab. You can review performance and usage stats aggregated across all VMs and Cloud Edges associated with this Cloud Extension. You can also review the total number of VMs running in cloud, WAN usage, IOPS, I/O latency and throughput, as well as other efficiency metrics.
Graphs are offered at pre-configured periods of Hour, Day, 7 days, 30 days, or a custom range.
The following metrics are available:
- Workload:
- IOPS: Total I/O operations per second generated by VMs in Google Cloud using this Cloud Extension (nodes A + B).
- IO Latency (ms): Average I/O latency for IO operations across all VMs in Google Cloud, using this Cloud Extension.
- Throughput (Bytes/sec): Total throughput across all VMs in Google Cloud, using this Cloud Extension (nodes A + B).
- WAN Usage (Bytes/sec): Total WAN throughput in each direction for the Cloud Extension, as reported by nodes A + B.
- Total #VMs in Cloud (running or stopped): Total VMs in Google Cloud, using this Cloud Extension.
- Datastore IO Offload %: Average I/O offload across node A and B. This is based on the ratio of I/O operations that were handled in cloud by nodes A and B, compared to the total I/O operations over the related vSphere Datastores on premises.
Viewing status
To monitor the current run state of the Cloud Extension, review the Velostrata Cloud Extension portlet on the Virtual Datacenter Summary page.
Cloud Extensions may be in any of the following states:
- Creating
- Starting
- Stopping
- Deleting
- Active
- Impaired
For a detailed explanation about availability of Cloud Extensions, see the Cloud Extensions overview.
Diagnosing impaired Cloud Extensions
Cloud Extensions often become impaired because components were not successfully deployed or because of system failures during operation. You can see these impairments in the list of health checks that failed.
After fixing the underlying causes, you can start a Cloud Extension repair operation. Repairing the Cloud Extension attempts to re-create the missing components and/or run relevant health checks. For more information, see Repairing a Cloud Extension. Once the Cloud Extension is repaired, its status becomes Active.
The following health checks are performed every minute to report on Cloud Extension status:
- Cache Store Accessibillity
- Velostrata Storage Grid Service Status
- Velostrata Cloud Edge Service
- SCSI Target
- Cloud Edge Local Storage
- Cloud Edge Functionality
- Exporter Service
- Exporter Functionality
- On-Premises Edge Service
To view basic Cloud Extension status from the web
- Sign in to your Velostrata Manager.
- Click the Target Cloud icon.
- A list of Cloud Extensions appears with the state of each listed on the far right.
- You can perform limited operations on a Cloud Extension by selecting one and using the buttons at the top to start, stop, delete, or repair.
To view advanced Cloud Extension status from vCenter
- To view the Cloud Extension status, view the Datacenter > Summary tab.
- Click the information icon in the status column for an Impaired Cloud Extension. The pop-up window displays component statuses as well as when the Cloud Extension was last Active.
- When the Cloud Extension status becomes Impaired, an alarm is triggered in the Summary tab.
- To view more details on an alarm, click to select the alarm.
- To acknowledge the alarm, click Acknowledge.
- To view the related events, select Monitor > Events.