Checking the Running Status of an MRS Cluster Node
Checking the running status of MRS cluster nodes helps cluster administrators and O&M engineers monitor node health and resource usage.
Typical applications include:
- Routine inspection: Periodically check the CPU, memory, and disk usage of each cluster node to detect resource bottlenecks and abnormal nodes early.
- Fault troubleshooting: When a task fails or a cluster alarm is triggered, check the node status to locate faulty nodes and abnormal components.
- Capacity planning: Monitor node resource usage trends to inform cluster expansion or node specification adjustments.
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 Node Running Status
You can check the node status from either the management console or MRS Manager.
- Log in to the MRS console.
- On the Active Clusters page, select a running target cluster and click its name to go to the cluster details page.
- On the cluster details page, click Nodes.
- 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.
- Log in to FusionInsight Manager of the MRS cluster.
For details about how to log in to FusionInsight Manager, see Accessing MRS Manager.
- Click 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.
- 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. - 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.
FAQs
Q: What should I do if a node status is Unknown?
A: The Unknown status usually indicates that MRS Manager cannot communicate with the node. Check whether the node network connection is normal, whether security group rules allow traffic through the communication port between MRS Manager and the node, and whether the node is stopped or isolated.
Q: What should I do if disk usage is high?
A: You can view disk partition usage in the disk status area on the host details page of MRS Manager. If the log directory is full, delete expired logs or adjust the log retention policy. If the data directory is full, evaluate whether to expand the node disk capacity or add nodes to the cluster.
Q: What should I do if a node status on the management console differs from MRS Manager?
A: The management console and MRS Manager use different data sources and update frequencies, which may cause temporary status inconsistencies. Always rely on MRS Manager for accurate status, and refresh your browser page to get the latest updates.
Helpful Links
- For details about viewing the running status and performance metrics of each component, see Viewing MRS Cluster Component Monitoring Metrics.
- For details about viewing and handling cluster alarms, see Viewing Alarms of an MRS Cluster.
- For details about stopping or starting all roles on a node when the node fails, see Starting or Stopping All Roles on an MRS Cluster Node.
