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Help Center/ MapReduce Service/ User Guide (ME-Abu Dhabi Region)/ MRS Manager Operation Guide (Applicable to 2.x and Earlier Versions)/ Monitoring Management/ Managing Services and Monitoring Hosts

Managing Services and Monitoring Hosts

Updated on 2022-02-22 GMT+08:00

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You can manage the following status and indicators of all services (including role instances) and hosts on the MRS Manager:

Status information: includes operation, health, configuration, and role instance status.
Metric information: includes key monitoring metrics for services.
Metric export: allows you to export monitoring reports.

NOTE:

Set an automatic refresh interval or click for an immediate refresh.

The following refresh interval options are supported:

Refresh every 30 seconds
Refresh every 60 seconds
Stop refreshing

Managing Service Monitoring

On MRS Manager, click Services.

The service list includes Service, Operating Status, Health Status, Configuration Status, Roles, and Operation are displayed in the component list.

Table 1 describes the service operating status.

**Table 1** Service operating status
Status	Description
Started	The service is started.
Stopped	The service is stopped.
Failed to start	Failed to start the role instance.
Failed to stop	Failed to stop the role instance.
Unknown	Indicates initial service status after the background system restarts.

Table 2 describes the service health status.

**Table 2** Service health status
Status	Description
Good	Indicates that all role instances in the service are running properly.
Bad	Indicates that the running status of at least one role instance is Faulty or the status of the service on which the current service depends is abnormal.
Unknown	Indicates that all role instances in the service are in the Unknown state.
Concerning	Indicates that the background system is restarting the service.
Partially Healthy	Indicates that the status of the service on which the service depends is abnormal, and APIs related to the abnormal service cannot be invoked by external systems.

Table 3 describes the service health status.

**Table 3** Service configuration status
Status	Description
Synchronized	The latest configuration takes effect.
Expired	The latest configuration does not take effect after the parameter modification. Related services need to be restarted.
Failed	The communication is incorrect or data cannot be read or written during the parameter configuration. Use Synchronize Configuration to rectify the fault.
Configuring	Parameters are being configured.
Unknown	Current configuration status cannot be obtained.

By default, the Service column is sorted in ascending order. You can click the icon next to Service, Operating Status, Health Status, or Configuration Status to change the sorting mode.

Click a specified service in the list to view its status and metric information.
Customize monitoring metrics and export customized monitoring information.
1. In the Charts area, click Customize to customize service monitoring metrics.
2. In Period area, select a time of period and click View to view the monitoring data within the time period.
3. Click Export to export the displayed metrics.

Managing Role Instances

On MRS Manager, click Services and click the target service name in the service list.

Click Instance to view the role status.

The role instance list contains the Role, Host Name, OM IP Address, Business IP Address, Rack, Operation Status, Health Status, and Configuration Status of an instance.

Table 4 shows the configuration status of a role instance.

**Table 4** Role instance status
Status	Description
Started	The role instance has been started.
Stopped	The role instance has been stopped.
Failed to start	Failed to start the role instance.
Failed to stop	Failed to stop the role instance.
Decommissioning	The role instance is being decommissioned.
Decommissioned	The role instance has been decommissioned.
Recommissioning	The role instance is being recommissioned.
Unknown	Indicates initial role instance status after the background system restarts.

Table 5 shows the health status of a role instance.

**Table 5** Role instance health status
Status	Description
Good	The role instance is running properly.
Bad	The role instance is abnormal. For example, the port cannot be accessed if PID does not exist.
Unknown	The host where a role instance resides does not connect to the background system.
Concerning	The background system is restarting a role instance.

Table 6 shows the configuration status of a role instance.

**Table 6** Role instance configuration status
Status	Description
Synchronized	The latest configuration takes effect.
Expired	The latest configuration does not take effect after the parameter modification. Related services need to be restarted.
Failed	The communication is incorrect or data cannot be read or written during the parameter configuration. Use Synchronize Configuration to rectify the fault.
Configuring	Parameters are being configured.
Unknown	Current configuration status cannot be obtained.

By default, the Role column is sorted in ascending order. You can click the sorting icon next to Role, Host Name, OM IP Address, Business IP Address, Rack, Operating Status, Health Status, or Configuration Status to change the sorting mode.

You can filter out all instances of the same role in the Role column.

You can set search criteria in the role search area by clicking Advanced Search, and click Search to view specified role information. Click Reset to clear the search criteria. Fuzzy search is supported.

Click the target role instance to view its status and metric information.
Customize monitoring metrics and export customized monitoring information.
1. In the Charts area, click Customize to customize service monitoring metrics.
2. In Period area, select a time of period and click View to view the monitoring data within the time period.
3. Click Export to export the displayed metrics.

Managing Hosts

On MRS Manager, click Hosts to view the status of all hosts.

The host list contains the host name, management IP address, service IP address, rack, network speed, operating status, health status, disk usage, memory usage, and CPU usage.

Table 7 shows the host operating status.

**Table 7** Host operating status
Status	Description
Normal	The host and service roles on the host are running properly.
Isolated	The host is isolated, and the service roles on the host stop running.

Table 8 describes the host health status.

**Table 8** Host health status
Status	Description
Good	The host can properly send heartbeats.
Bad	The host fails to send heartbeats due to timeout.
Unknown	The host initial status is unknown during the operation of adding or deleting a host.

By default, the Host Name column is sorted by host name in ascending order. You can click the sorting icon next to Host Name, OM IP Address, Business IP Address, Rack, Network Speed, Operating Status, Health Status, Disk Usage, Memory Usage, or CPU Usage to change the sorting mode.

Click the target host in the host list to view its status and metric information.
Customize monitoring metrics and export customized monitoring information.
1. In the Charts area, click Customize to customize service monitoring metrics.
2. In Period area, select a time of period and click View to view the monitoring data within the time period.
3. Click Export to export the displayed metrics.

Parent topic: Monitoring Management

Previous topic: Dashboard

Next topic: Managing Resource Distribution

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