Description
The Agent checks whether an OBProxy process exists. OCP queries the status of an existing process once every second. If 1 is returned, the corresponding process exists. If 0 is returned, the corresponding OBProxy process does not exist and this alert is triggered.
Alert information
| Trigger method | Alert level | Scope |
|---|---|---|
| Based on the expression of the metric | Stopped | Server |
Alert rule
| Metric | Default threshold | Source | Duration | Detection cycle | Elimination cycle |
|---|---|---|---|---|---|
| obproxy_process_exists | 0 (cannot be connected) | The OCP-Agent checks the local OBProxy process. | 0s | 10s | 5 min |
Alert templates
Overview: ${alarm_target} ${alarm_name}
Details: OBProxy Cluster: ${obproxy_cluster}, Host: ${host}, Alert: ${alarm_name}
Overview example: obproxy_cluster_id=3:obproxy_cluster=obproxy_02:svr_ip=xxx.xxx.xxx.xxx. The OBProxy process does not exist.
Details example: OBProxy Cluster: obproxy_02, Host: xxx.xxx.xxx.xxx, Alert: The OBProxy process does not exist.
${alarm_target} indicates the object that generates the alert. It follows the obproxy_cluster_id=xx:obproxy_cluster=xx:svr_ip=xx format. obproxy_cluster_id indicates the ID of the OBProxy cluster where the alert is generated. ob_cluster indicates the name of the OBProxy cluster where the alert is generated. svr_ip indicates the IP address of the OBProxy machine where the alert is generated.
Impact on the system
As the proxy layer of the OBServer cluster, the OBProxy provides access to OBServer. If the OBProxy process does not exist, your application cannot connect to the database.
Possible causes
The following are the common possible causes:
A network communication error occurs.
The OBProxy process has stopped abnormally.
The OBProxy process is alive but is unresponsive, without reporting its heartbeat.
Solutions
Check for the cause of the OBProxy process exception and recover the OBProxy process.
If the OBProxy machine is damaged, replace it with a new one.
If the OBProxy is no longer required, you can delete it.
If a process exception occurs, handle the issue by referring to ob_cannot_connected.
