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In this video we are going to learn a lambda function logging in Node.js example it is lambda automatically

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monitors lambda functions on behalf and sends the function matrix to the Amazon cloud.

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Watch.

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A lambda function comes with the cloud watch logs, log groups and the log stream for each instance

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or of our invocations.

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Lambda Runtime Environment sent details about each invocation to the log stream and relies logs and

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other outputs from our function code.

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So in this video we will see how to produce log output from our lambda function code and access logs

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using the alias CLI and lambda console and see the cloud watch logs.

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So let's create an example step for our case.

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So in our case, please open the Visual Studio code and see that we will develop Lambda Function Code

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to update with the logging information.

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Zip function code update function code weekly and invoke updated function code.

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So let's start with the first step, which is the Lambda function code.

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As you remember that in the last video we have developed this index file to see context object and use

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the console log operation.

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So in this video, I'm going to update a bit about this function code.

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For example, let's remove this log operation.

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You can see that this is the standard log operation.

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I'm going to use different type of to log into the lambda function.

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So I'm going to remove this line of code and test in here.

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Okay.

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So basically we have some log types we can use console.log for the standard logs and we can use console

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info to produce info log.

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We can use console that one method for producing warning logs into our cloud watch events for Node.js

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Lambda functions.

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So please save this file.

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And this is the our updated function code and we will follow these log information to the Amazon cloud

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logs.

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So I have updated our lambda function and follow the steps that we are going to update function.

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So basically I'm going to zip function code copy from Windows one and go to lecture five to file and

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create a function zip file.

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And the third step is update lambda function code with CLI.

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So I'm going to use this command which is the update function code giving the function name as my function

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tree and specifying the function zip file hit enter.

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And this will be update our function code.

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You can verify from the management console and the last step is invoke our object, we can create an

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object.

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So basically I'm copying from previous lecture and paste in here key value.

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Okay.

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If you follow our command text, we are going to invoke our function bit using this address.

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Lambda invoke command and here is my function name and here is the payload paste in here and hit enter.

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This will be invoke our lambda function and see the response.

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JSON is created successfully.

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Now the important thing is we have created three type of logs in here.

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So now let's check these logs from the Amazon cloud logs.

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For that purpose I'm going to open our application.

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So here you can find the lambda functions and open my function tree.

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Go to monitor and open veev logs in the cloud watch logs and here we will see the last log stream and

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you can see that we have tree log statement in our function.

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This tree offline comes with these lines in the cloud logs.

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The first one is the console log, standard log, standard log.

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That means it is creating info log and the second one is info log.

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We are creating an envelope and the last one is one warning log.

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You can see warning log is a log type is a one in here.

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So as you can see that we have seen a lambda function logging in logs example.