Show Me the Code
This repo contains code used to run the online demo.
├── compile.sh <-- commands used to compile LibreOffice for Lambda ├── infra <-- terraform config to deploy example Lambda │ ├── iam.tf │ ├── lambda.tf │ ├── main.tf │ ├── s3.tf │ └── vars.tf └── src <-- example Lambda function node in Node.js used for website demo ├── handler.js ├── libreoffice.js ├── logic.js ├── package.json <-- put lo.tar.gz in this folder to deploy. Download it below └── s3.js
Compiled and ready to use archive can be downloaded under Releases section. Also check out NPM package with bundled LibreOffice for Lambda (85 MB).
How to compile by yourself
Check out a comprehensive step-by-step tutorial from 0 to deployed function.
- Go to Lambda Execution Environment and Available Libraries page to get the latest AMI id
- Click on this link to get AMI id for your region
- Spin up a
c5.2xlargespot instance with ~ 100 GB of storage attached
- Follow the steps in
compile.shfile in the repo
- Docker in AWS Lambda
- NPM package with bundled LibreOffice for Lambda (85 MB)
- Lambda Layer with LibreOffice
How To Help
Reduce Cold Start Time
Currently ƛ unpacks 109 MB .tar.gz to
/tmp folder which takes ~1-2 seconds on cold start.
Would be nice to create a single compressed executable to save unpack time and increase portability. I tried using Ermine packager and it works!! But unfortunately this is commercial software. Similar open-source analogue Statifier produces broken binaries.
Maybe someone has another idea how to create a single executable from a folder full of shared objects.
Further Size Reduction
I am not a Linux or C++ expert, so for sure I missed some easy "hacks" to reduce size of compiled LibreOffice.
Mostly I just excluded from compilation as much unrelated stuff as possible. And stripped symbols from shared objects.
You can also use multi compression level, with upx and then decompress after brotli.
Update repo for testing. Return before S3 for example, hardcode or generate files to convert and setup variables. Then simply run:
docker run \ -v "\$PWD":/var/task \ lambci/lambda:nodejs12.x src/handler.handler
After successful execution, get the resulted files to check the pdfs.
docker ps -a
Find exect container id.
docker cp containerId:/tmp/filename.pdf ./filename.pdf
Then check your results locally
MIT © Vlad Holubiev