Troubleshooting: high availability issues
You can find information following about actions to take if you experience availability issues.
Health notifications
When you run your gateway on VMware vSphere HA, all gateways produce the following
health notifications to your configured Amazon CloudWatch log group. These notifications go into
a log stream called AvailabilityMonitor
.
Topics
Notification: Reboot
You can get a reboot notification when the gateway VM is restarted. You can restart a gateway VM by using the VM Hypervisor Management console or the Storage Gateway console. You can also restart by using the gateway software during the gateway's maintenance cycle.
Action to Take
If the time of the reboot is within 10 minutes of the gateway's configured maintenance start time, this is probably a normal occurrence and not a sign of any problem. If the reboot occurred significantly outside the maintenance window, check whether the gateway was restarted manually.
Notification: HardReboot
You can get a HardReboot
notification when the gateway VM is
restarted unexpectedly. Such a restart can be due to loss of power, a hardware
failure, or another event. For VMware gateways, a reset by vSphere High Availability
Application Monitoring can cause this event.
Action to Take
When your gateway runs in such an environment, check for the presence of the
HealthCheckFailure
notification and consult the VMware events log
for the VM.
Notification: HealthCheckFailure
For a gateway on VMware vSphere HA, you can get a HealthCheckFailure
notification when a health check fails and a VM restart is requested. This event
also occurs during a test to monitor availability, indicated by an
AvailabilityMonitorTest
notification. In this case, the
HealthCheckFailure
notification is expected.
Note
This notification is for VMware gateways only.
Action to Take
If this event repeatedly occurs without an AvailabilityMonitorTest
notification, check your VM infrastructure for issues (storage, memory, and so on).
If you need additional assistance, contact AWS Support.
Notification: AvailabilityMonitorTest
For a gateway on VMware vSphere HA, you can get an
AvailabilityMonitorTest
notification when you run a test of the Availability and application monitoring system in VMware.
Metrics
The AvailabilityNotifications
metric is available on all gateways. This
metric is a count of the number of availability-related health notifications generated
by the gateway. Use the Sum
statistic to observe whether the gateway is
experiencing any availability-related events. Consult with your configured CloudWatch log
group for details about the events.