You can store function invocation logs in Log Service, and then perform operations
such as code debugging, fault analysis, and data analysis based on the logs. This
topic describes how to configure the logging feature in the Function Compute console. This topic also describes how to view function invocation logs.
Background information
Log Service is a one-stop log data management service developed by Alibaba Cloud. Before you
use Log Service to store function invocation logs, you must specify a Log Service
project and a Log Service Logstore for your service in Function Compute and authorize
the service to access Log Service. Function invocation logs are stored in the specified
Logstore. All function invocation logs that are generated for a service in the same
region are stored in the same Logstore.
Billing
When you configure the logging feature, Function Compute may automatically create a Log Service project and a Log Service Logstore that are charged based on the pay-as-you-go billing method. For more information
about billing, see Billable items.
Prerequisites
- Function Compute
- Optional:Log Service
Configure the logging feature
- Log on to the Function Compute console.
- In the left-side navigation pane, click Services and Functions.
- In the top navigation bar, select the region where the service resides.
- On the Services page, find the desired service. Click Configure in the Actions column.
- In the Log Settings section, configure the parameters that are described in the following table and click
Save.

Note
- If you have enabled the logging feature when you create the service, the Log Service Project parameter is automatically set to the Log Service project that is automatically created by Function Compute and starts with
aliyun-fc-cn-<region_id>
. The Logstore parameter is automatically set to the default Log Service Logstore under the specified Log Service project. If a Log Service project has been automatically created by Function Compute in the current region before,
the system uses this Log Service project and does not create another project.
- If the logging feature is disabled when you create the service, you must manually
configure the Log Service Project and Logstore parameters.
Parameter |
Required |
Description |
Logging |
Yes |
Specifies whether to enable the logging feature. Valid values:
- Enable: enables the logging feature. After the logging feature is enabled, you can view
function invocation logs. The function invocation logs are stored in Log Service for
queries.
- Disable: disables the logging feature.
|
Log Service Project |
Yes |
Specifies the Log Service project that stores function invocation logs. |
Logstore |
Yes |
Specifies the Log Service Logstore that stores function invocation logs. |
Log Rotation Rules |
No |
Specifies whether to split function invocation logs. Valid values:
- Enable: If you select this option, Function Compute splits function invocation logs and stores the generated log blocks in Log Service.
Function Compute splits function invocation logs by checking whether the log lines
start with a date. For example, the log line that starts with 2021-10-10 is considered
as the first line of a log block. The first line and the subsequent consecutive lines
that do not start with a date in the log block are written to Log Service as a whole.
- Disable: If you select this option, Function Compute does not split function invocation logs.
|
Request-level Metrics |
No |
Specifies whether to enable the Insights feature of Function Compute for the service. If you enable the Insights feature, you can view the invocation
metrics. Valid values:
- Enable: If you select this option, invocation metrics for functions in the service are collected
and delivered to the specified Logstore.
- Disable: If you select this option, the Insights feature of Function Compute is disabled for the service. In this case, you cannot view the invocation metrics.
|
Instance-level Metrics |
No |
Specifies whether to enable the collection of instance-level metrics. Valid values:
- Enable: If you select this option, instance-level metrics are collected. Instance-level
metrics are performance metrics of instances. The instances are monitored, and their
performance metrics are collected and displayed in real time. The metrics facilitate
end-to-end monitoring and troubleshooting for the instances. For more information,
see Instance-level metrics.
- Disable: If you select this option, instance-level metrics are not collected.
|
Note You can also click Enable on the Logs tab on the details page of a function to enable the logging feature. Function Compute automatically creates a Log Service project that starts with aliyun-fc-cn-<region_id>
and a default Logstore under the Log Service project. If a Log Service project has been automatically created by Function Compute in the current region before,
the system uses this Log Service project and does not create another project.
View function invocation logs
To view the invocation logs of a function, click the Logs tab on the details page of the function.
Note You can change the version or alias of the function in the Version or Alias drop-down
list in the upper part of the page to query the invocation logs of the specific version
or alias.
You can view the function invocation logs on the
Call Request List tab or the
Search by Keyword tab. The following part describes the differences of the information displayed on
the two tabs:
- Call Request List tab
The function invocation time, request ID, invocation result, instance ID, and function
version and alias are displayed on the Call Request List tab. The following figure
shows an example.

- Click the request ID of an invocation record to view the details of the request and logs.
- Click the instance ID of an invocation record to view the resource usage of the instance, such as CPU utilization,
memory usage, and network traffic.
- Click View Logs in the Actions column that corresponds to an invocation record to view the log details. Click Advanced Logs in the Actions column to go to the Log Service console to query and analyze logs.
- Search by Keyword tab
The function invocation time, log content, and function version and alias are displayed
on the Search by Keyword tab. The following figure shows an example. Click
Log Context in the
Actions column that corresponds to an invocation record to query the context of a log entry.
Click
Logstore in the
Actions column to go to the
Log Service console to query and analyze logs.

You can enter a keyword in the search box to query logs based on your requirements.
For example, if you want to search for logs that contain
hello world
, you can enter
hello world
in the search box. All log entries that contain the specified keywords are returned.
The following figure shows an example. For more information about the syntax of querying
logs by keyword, see
Search syntax.

References
In addition to the Function Compute and Log Service consoles, you can also use Serverless
Devs to configure the logging feature and query logs. For more information, see the
following topics: