Restrictions

Dashboard

Dashboard

A maximum of 1000 dashboards can be created in a region.

Graph

A maximum of 30 graphs can be added to a dashboard.

Resources, threshold rules, components, or hosts in a graph

• A maximum of 12 resources can be added to a digit graph. Only one resource can be displayed. By default, the first resource is displayed.
• A maximum of ten threshold rules can be added to a threshold status graph.
• A maximum of ten hosts can be added to a host status graph.
• A maximum of ten components can be added to a component status graph.

Metric

Metric data

• Basic edition: Metric data can be stored for up to 7 days.
• Professional edition: Metric data can be stored for up to 30 days.

Metric item

After resources (such as clusters, components, and hosts) are deleted, their metric items can still be stored for up to 30 days.

Dimension

A maximum of 20 dimensions can be configured for a metric.

Metric query API

A maximum of 20 metrics can be queried at a time.

Statistical period

The maximum statistical period is 1 hour.

Data points returned for a single query

A maximum of 1440 data points can be returned each time.

Custom metric

No restrictions.

Custom metric reported

A single request cannot exceed 40 KB. The timestamp of a reported metric cannot be 10 minutes later than the standard UTC time. In addition, out-of-order metrics are not received. That is, if a metric is reported at a certain time point, the metrics of earlier time points cannot be reported.

Application metric

Job metric

• When the number of containers on a host exceeds 1000, the ICAgent stops collecting application metrics and sends the ICAgent Stopped Collecting Application Metrics alarm (ID: 34105).
• When the number of containers on a host within 1000, the ICAgent resumes the collection of application metrics and the ICAgent Stopped Collecting Application Metrics alarm is cleared.

A job automatically exits after it is completed. To monitor metrics of a job, ensure that its survival time is greater than 90s so that the ICAgent can collect its metric data.

Resources consumed by the ICAgent

When the ICAgent collects basic metrics, the resources consumed by the ICAgent are related to the number of containers and processes. On a VM without any services, the ICAgent consumes 30 MB memory and records 1% CPU usage. To ensure collection reliability, ensure that fewer than 1000 containers run on a single node.

Alarm rule

Alarm rule

A maximum of 3,000 alarm rules (including metric alarm rules and event alarm rules) can be created.

Alarm template

A maximum of 150 alarm templates can be created.

Log

Restrictions on the log function

For more information, see LTS Usage Restrictions.

Log file

Only text log files can be collected. Other types of log files (for example, binary files) cannot be collected.

The ICAgent can collect a maximum of 20 log files from a volume mounting directory.

The ICAgent can collect a maximum of 1000 standard container output log files. These files must be in JSON format.

Resources consumed during log file collection

The resources consumed during log file collection are closely related to the log volume, number of files, network bandwidth, and backend service processing capability.

Log discarding

When a single log line exceeds 10,240 bytes, it will be discarded.

Log collection path

Linux

• Collection paths support recursion. You can use double asterisks (**) to collect logs from up to five directory levels. Example: /var/logs/**/a.log
• Collection paths support fuzzy match. You can use an asterisk (*) to represent one or more characters of a directory or file name. Example: /var/logs/*/a.log or /var/logs/service/a*.log
• If the collection path is set to a directory, for example, /var/logs/, only .log, .trace, and .out files in the directory are collected. If the collection path is set to name of a text file, that file is directly collected.
• Each collection path must be unique. That is, the same path of the same host cannot be configured for different log groups and log streams.

Windows

• Collection paths support recursion. You can use double asterisks (**) to collect logs from up to five directory levels. Example: C:\var\service\**\a.log
• Collection paths support fuzzy match. You can use an asterisk (*) to represent one or more characters of a directory or file name. Examples: C:\var\service\*\a.log and C:\var\service\a*.log
• Each collection path must be unique. That is, the same path of the same host cannot be configured for different log groups and log streams.
• Each collection path must be unique. That is, the same path of the same host cannot be configured for different log groups and log streams.

Log repetition

When the ICAgent is restarted, identical data may be collected around the restart time.

Historical logs

The storage duration and prices of log data vary according to editions.

Alarm list

Alarms

You can query alarms generated within 31 days in the last year.

Events

You can query events generated within 31 days in the last year.

Application discovery

Application discovery rules

A maximum of 100 application discovery rules can be created.