I linked the wrong file from an AWS S3 to my AWS Lambda Function. I want to delete the file.
This post is similar, but I do not know how to reupload the zip file. I want to either replace it, or preferably, remove it so that I can edit the code again using the inline editor.
If you are not using versioning you will need to re-upload the correct version of the code again.
There is no removing the code you have there as this is now your Lambda functions code, any upload replaces this.
For the future take a look at using versioning for your functions so that you can ensure that any accidental uploads will not disrupt applications that are using your Lambda function.
Related
I need a solution for entering new data in csv that is stored in S3 bucket in AWS.
At this point we are downloading the file, editing and then uploading it again in s3 and we would like to automatize this process.
We need to add one row in a three column.
Thank you in advance!
I think you will be able to do that using Lambda Functions. You will need to programmatically make the modifications you need over the CSV but there are multiple programming languages that allow you to do that. One quick example is using python and the csv library
Then you can invoke that lambda or add more logic to the operations you want to do using an AWS API Gateway.
You can access the CSV file (object) inside the S3 Bucket from the lambda code using the AWS SDK and append the new rows with data you pass as parameters to the function
There is no way to directly modify the csv stored in S3 (if that is what you're asking). The process will always entail some version of download, modify, upload. There are many examples of how you can do this, for example here
I have a requirement where I need to write a long String log for each execution of my lambda function, this String is basically log having record of failed and success cases.
as this code is for lambda its not possible to create file in a physical location like local file directly and upload to s3. but I need to directly create a file and write the String in one go.
Thanks in advance.
AWS Lambda functions can write data to the /tmp/ directory. There is a 512MB limit, so delete any files before your Lambda function exits so that it is clear for the next function execution.
You can therefore create a 'local' file and upload it to Amazon S3.
Alternatively, you can use the Amazon S3 API to create an object (PutObject()) while specifying the Body content without creating an actual file. This might be easier for you.
By the way, if your Lambda function prints output, it will automatically be captured by the Lambda function and stored in CloudWatch Logs. It will be intermixed with other messages from Lambda (eg showing the amount of memory used), but it's an easy way to log information.
So, I have tried AWS lambda layers and I have no issues with them so far. When I want to put libraries over there that my lambda functions will require after all I needed it put the package jwt-decode in a folder structure like this:
nodejs/node_modules/jwt-decode uploaded as .zip no problems.
The problem is... I want to also share my own custom code between my Lambda functions without publishing it as a npm package. Is that even possible?
Say you have a function that uses jwt-decode and decodes your access token from the authorization header event.headers.authorization then it fetches the "sub" identifier from the decoded token. I want to share this code because I don't want to write this implementation for each Lambda function that requires the sub identifier.
I had made a lambda function in the past which I want to change. At the time of making it there were no layers, so I was forced to use a deployment package. I have published this version under an alias, and would like to modify the $latest version .
However, in the $latest version, which is editable, the only code entry types available are zip and S3, the code editor is not there. How can I remove the deployed package so I can use a layer with some libraries, and write the code into the editor.
Easiest way would be to create a new lambda, enter your code in the editor and then export the function as a zip file. Then just go over to your original lambda and upload this zip file. You can delete the new lambda you created after you do this.
Just create a zip file of your code only and upload it using 'upload a zip file'. This will replace your existing package with a smaller code file that can me edited via online editor. NOTE: only zip your lambda_function.py file and nothing else. Rest you can upload via layers as you said.
Firstly, I am a newbie to AWS. I was able to edit my Lambda code in line, but I recently uploaded a zip file to it(30MB) to S3 bucket and added this zip to my Lambda from S3, and now my Lambda inline editor doesn't open anymore saying the following error
"The deployment package of your Lambda function "LF2" is too large to
enable inline code editing. However, you can still invoke your function."
I tried deleting my zip file from S3 bucket hoping that the URL of zip would not be reachable and the lambda would lose the zip file and let me edit the function again. But, my lambda size still consists of the 30MB zip file size. I am unable to delete this zip and can't figure out a way to get rid of this it and edit my lambda code again.
Note: My Lambda code was written in-line and different from the zip file(which only contains elastic search setup files which I uploaded for using in my code since import elastic search wasn't working). I know there would have been a better way to do this without uploading it's zip.
Yes, you can download the Lambda function. Go to the AWS console for the Lambda function, make sure you are in the Configuration view, then click Actions | Export function. This will allow you to download a ZIP file containing the Lambda function.
Note that once you upload a Lambda function via S3, it's copied by the Lambda service. There's no connection at that point back to the S3 object that you uploaded. One reason for this is that your Lambda function would break if you, accidentally or otherwise, deleted the file from S3.
I had this problem yesterday then I somehow managed to find my code but not that full code that was vanished from AWS lambda. I wrote that code again, tested it, then tried to upload it with the same name of the lambda function and at the same lambda function by compressing it in my own system.
While uploading it, lambda gave me the option to choose between the remote file I uploaded and the local file it had saved previously. I opted for the local file and boom! I got my code back as it was last saved.
So, I suggest you to just try to upload a random blank compressed zip file containing one file name same as the lambda function. It would give you the option to choose from both files, then choose for "local" file. It would take you to the in-line editor where your code was.
I just ran into same soup .. seem like the upload replaced the previous index.js with export handler.