Collect metric data from hosts

Limits

• Windows servers are not supported.

• Metric data about GPUs and hardware status cannot be collected.

• Only Linux Logtail V0.16.40 and later can collect host metric data. If you have installed an earlier version of Logtail on your server, you must update Logtail to a supported version. For more information, see Install Logtail on a Linux server.

Configure data collection

1. Sign in to the Simple Log Service console.

2. On the right side of the console, click the Quick Data Import card.

3. On the Import Data page, click Host Monitoring.

4. Select the target Project and MetricStore, and click Next. In the Select Log Space step, select an existing Project and MetricStore, or click Create Now on the right to create new ones, and then click Next.

5. On the Create Machine Group tab:

   • If you have an available machine group, click Use Existing Machine Groups. Select Host scenario and ECS. From the source machine group list, select the target machine group and click > to move it to the applied machine group list. Then, click Next.

   • If no machine groups are available, perform the following steps to create a machine group. In this example, an Elastic Compute Service (ECS) instance is used.

     1. On the ECS Instance tab, in the Manually select instances section, select the target ECS instance and click Create.

        For more information, see Install Logtail on ECS instances.

        Important

        If you want to collect logs from an ECS instance that belongs to a different Alibaba Cloud account than Simple Log Service, a server in a data center, or a server of a third-party cloud service provider, you must manually install Logtail. For more information, see Install Logtail on a Linux server. After you manually install Logtail, you must configure a user identifier for the server. For more information, see Configure a user identifier.

     2. After the installation is complete, click Complete Installation.

     3. On the Create Machine Group page, enter a Name and click Next.

        In Simple Log Service, you can create IP address-based machine groups and custom identifier-based machine groups. For more information, see Create a machine group.

6. On the Configure Data Source tab, set the Configuration Name and Plug-in Configuration. Then, click Next.

   Important

   The required 'inputs' parameter specifies the data source configuration. You can configure only one data source type in 'inputs'.

   {
       "inputs": [
           {
               "detail": {
                   "IntervalMs": 30000
               },
               "type": "metric_system_v2"
           }
       ]
   }

   Parameter	Type	Required	Description
   type	string	Yes	The type of the data source. Set the value to metric_system_v2.
   IntervalMs	int	Yes	The interval between two consecutive requests. Unit: milliseconds. The value must be greater than or equal to 5000. We recommend that you set the value to 30000.

7. Click Query logs to view the collected data in the MetricStore.

Data monitoring

1. On the target time series database homepage, click Metric Statistics to open the Metric Statistics dashboard.

2. On the Metric Statistics dashboard, view all collected metrics. You can also filter the data by time range or labels.

   

3. On the time series database homepage, click Metrics Explorer (Metrics: 48) to explore, view, and filter all available metric names and their metadata. To view CPU and memory data, you can use queries such as cpu_count{} and mem_cache{}. For more information about queries and analysis, see Query and analyze time series data.

4. You can filter data from multiple instances by hostname or ip. To ensure accurate results, clear any previous query data before applying a new filter. After selecting a metric such as cpu_count, the page displays its labels (for example, hostname and ip), the count of unique values, and sample values. In the Actions column for a label, click Filter, select an operator, and enter a filter value to create a condition such as ip = 172.26.150.228. Then, click + Add to query box to add the condition to your query.

Metrics