# AWS Lambda logs AWS Lambda automatically monitors Lambda functions on your behalf and sends function metrics to Amazon CloudWatch. You can create a log ingestion into Amazon OpenSearch Service either by using the Centralized Logging with OpenSearch console or by deploying a standalone CloudFormation stack. **Important** The Lambda Region must be the same as the Centralized Logging with OpenSearch solution. The Amazon OpenSearch Service index is rotated on a daily basis by default, and you can adjust the index in the Additional Settings. ## Create log ingestion (OpenSearch Engine) ### Using the Centralized Logging with OpenSearch Console 1. Sign in to the Centralized Logging with OpenSearch Console. 1. In the navigation pane, under **Log Analytics Pipelines**, choose **Service Log**. 1. Choose the Create a log ingestion button. 1. In the **AWS Services** section, choose **AWS Lambda**. 1. Choose **Next**. 1. Under **Specify settings**, choose the Lambda function from the dropdown list. (Optional) If you are ingesting logs from another account, select a [linked account](cross-account-ingestion.md#add-a-member-account) from the **Account** dropdown first. 1. Choose **Next**. 1. In the **Specify OpenSearch domain** section, select an imported domain for the Amazon OpenSearch Service domain. 1. Choose **Yes** for **Sample dashboard** if you want to ingest an associated templated Amazon OpenSearch Service dashboard. 1. You can change the **Index Prefix** of the target Amazon OpenSearch Service index if needed. The default prefix is the Lambda function name. 1. In the **Log Lifecycle** section, input the number of days to manage the Amazon OpenSearch Service index lifecycle. The Centralized Logging with OpenSearch will create the associated [Index State Management (ISM)](https://opensearch.org/docs/latest/im-plugin/ism/index/) policy automatically for this pipeline. 1. In the **Log processor settings** section, choose **Log processor type**, configure the Lambda concurrency if needed, and then choose **Next**. 1. Add tags if needed. 1. Choose **Create**. ### Using the CloudFormation Stack This automated AWS CloudFormation template deploys the *Centralized Logging with OpenSearch - Lambda Log Ingestion* solution in the AWS Cloud. | | Launch in AWS Management Console | Download Template | | --- | --- | --- | | AWS Regions | [https://console.aws.amazon.com/cloudformation/home#/stacks/new?templateURL=https://solutions-reference.s3.amazonaws.com/centralized-logging-with-opensearch/latest/LambdaLog.template](https://console.aws.amazon.com/cloudformation/home#/stacks/new?templateURL=https://solutions-reference.s3.amazonaws.com/centralized-logging-with-opensearch/latest/LambdaLog.template) | [Template](https://solutions-reference.s3.amazonaws.com/centralized-logging-with-opensearch/latest/LambdaLog.template) | | AWS China Regions | [https://console.amazonaws.cn/cloudformation/home#/stacks/new?templateURL=https://solutions-reference.s3.amazonaws.com/centralized-logging-with-opensearch/latest/LambdaLog.template](https://console.amazonaws.cn/cloudformation/home#/stacks/new?templateURL=https://solutions-reference.s3.amazonaws.com/centralized-logging-with-opensearch/latest/LambdaLog.template) | [Template](https://solutions-reference.s3.amazonaws.com/centralized-logging-with-opensearch/latest/LambdaLog.template) | 1. Log in to the AWS Management Console and select the button to launch the AWS CloudFormation template. You can also download the template as a starting point for your own implementation. 1. To launch the Centralized Logging with OpenSearch in a different AWS Region, use the Region selector in the console navigation bar. 1. On the **Create stack** page, verify that the correct template URL shows in the **Amazon S3 URL** text box and choose **Next**. 1. On the **Specify stack details** page, assign a name to your solution stack. 1. Under **Parameters**, review the parameters for the template and modify them as necessary. This solution uses the following parameters. [\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/solutions/latest/centralized-logging-with-opensearch/aws-lambda-logs.html) 1. Choose **Next**. 1. On the **Configure stack options** page, choose **Next**. 1. On the **Review and create** page, review and confirm the settings. Check the box acknowledging that the template creates AWS Identity and Access Management (IAM) resources. 1. Choose **Submit** to deploy the stack. You can view the status of the stack in the AWS CloudFormation console in the **Status** column. You should receive a **CREATE\$1COMPLETE** status in approximately 15 minutes. ### View dashboard The dashboard includes the following visualizations. | Visualization Name | Source Field | Description | | --- | --- | --- | | Lambda Events | \$1 log event | Presents a chart that displays the distribution of events over time. | | Log Accounts | \$1 owner | Shows a pie chart representing the proportion of log events from different AWS accounts (owners). | | Log Groups | \$1 log\$1group | Displays a pie chart depicting the distribution of log events among various log groups in the Lambda environment. | | Log-List | \$1 time \$1 log\$1group \$1 log\$1stream \$1 log\$1detail | Provides a detailed list of log events, including timestamps, log groups, log streams, and log details. | You can access the built-in dashboard in Amazon OpenSearch Service to view log data. For more information, see the [Access Dashboard](getting-started.md#step-4-access-the-dashboard). **Lambda logs sample dashboard.** ![\[image39\]](http://docs.aws.amazon.com/solutions/latest/centralized-logging-with-opensearch/images/image39.png)