Used to trigger notifications for any metric using various options (max, min)
Alarm states
- OK
- INSUFFICIENT DATA
- ALARM
Alarm Targets:
- EC2 - Stop, Terminate, Reboot, Recover
- Trigger auto scaling
- SNS
- OpsCenter action
Composite Alarms
- Monitor states of multiple alarms, using boolean ops, AND, OR conditions
- Alarm noice can be reduced with this
EC2 Recovery
- EC2 instance is failed some status checks which can be monitored via cloudwatch, then recovery action can be triggerd