Checking the Running Status of an MRS Cluster Node

Prerequisites

• The IAM users have been synchronized in advance. You can do this by clicking Synchronize next to IAM User Sync on the Dashboard page of the cluster details.
• You have logged in to MRS Manager. For how to log in, see Accessing MRS Manager.

Checking the Node Status on the Console

1. Log in to the MRS console.
2. On the Active Clusters page, select a running cluster and click its name to switch to the cluster details page.
3. On the cluster details page, click Nodes.
4. Expand the node group name to view basic information about the nodes in a node group, such as their status, CPU usage, memory usage, and disk usage.

   In the host list, click a host name to view detailed node information.

   Table 1 MRS cluster node information

   Parameter	Description
   Node Group	Node group name.
   Node Type	Node type corresponding to the node group. For details, see MRS Cluster Node Types. On the Nodes page, click next to a node group name to unfold the nodes contained in the node group. Click a node name to remotely log in to the ECS using the password or key pair configured during cluster creation. For details about the parameters, see Viewing MRS Cluster Component Monitoring Metrics.
   Node Count	Number of nodes in a node group.
   Billing Mode	Billing mode of the cluster you purchased, including Pay-Per-Use and Yearly/Monthly.

Checking the Node Status on Manager (MRS 3.x or Later)

1. Log in to FusionInsight Manager.
2. Click Hosts to view the host list.

   The host list shows all the hosts in the cluster along with their basic information. You can use this list to perform O&M operations on hosts, apply filters, and search for specific hosts. Additionally, you can click Export All, set Save As to TXT or CSV, and click OK to export information about all hosts. Host View is displayed by default. You can click Role View to switch the view type. You can also click the edit button to customize the content displayed in each view.

   Table 2 View type description

   View Type	Description
   Host View	Displays the IP address, rack planning, running status, and hardware resource usage of each host.
   Role view	Displays the roles that have been deployed on each host. If the role supports the active/standby mode, the role name is displayed in bold.

   Table 3 Host running status description

   Status	Description
   Normal	Indicates that the host is in the normal state.
   Faulty	Indicates that the host is abnormal.
   Unknown	Indicates that the initial status of the host cannot be detected.
   Isolated	Indicates that the host is isolated.
   Suspended	Indicates that the host is stopped.

3. In the host list, click the specified host name to view the host overview information.
   The host details page contains the basic information area, disk status area, instance list area, and monitoring graphs.

   Table 4 Host details

   Item	Description
   Basic Information	The basic information area contains the key information about the host, such as the management IP address, service IP address, host type, rack, firewall, number of CPU cores, and OS.
   Disk	The disk status area contains all disk partitions configured for the cluster on the host and the usage of each disk partition.
   Instances	The instance list displays all role instances installed on the host and the status of each role instance. You can click the log file next to a role instance name to view the log file content of the instance online.
   Alarm and Event Record	The alarm and event history area displays the key alarms and events reported by the current host. The system can display a maximum of 20 historical records.
   Chart	The monitoring chart area is displayed on the right of the host details page, and contains the key monitoring metrics of the host. You can choose > Customize in the upper right corner to customize the monitoring reports to be displayed in the chart area. Select a time range and choose > Export to export detailed monitoring metric data within the specified time range. You can click next to the title of a monitoring indicator to open the description of the monitoring metric.

4. View the host chart, process, and resource information.
   Click the Chart, Process, and Resource to view the full monitoring chart information about the host.

   • The Chart page displays all monitoring graphs of the host.
   • The Process page shows information about the role processes of the deployed service instances on the current host, including their status, PID, and running time. You can easily access the log files of each process online.
   • The Resource page displays the resource usage details of the deployed service instances on the current host, such as CPU, memory, disk, and port usage.

Checking the Node Status on Manager (MRS 2.x or Earlier)

1. Log in to MRS Manager.
2. Click Hosts to view the status of all hosts.
   The following table lists the operating status and health status of the host.

   Table 5 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 6 Host health status

   Status	Description
   Good	The host can properly send heartbeats.
   Bad	The host fails to send heartbeats due to timeout.
   Unknown	Initial status of the host when the host is added.

3. Click the target host in the host list to view its status and metric information.
4. Customize and export monitoring charts.
   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.