My Playwright Python script works fine on my computer but doesn’t run in AWS Lambda. It times out and doesn’t finish the automation task. Here’s a snippet of my code:
async def automate_task(self):
async with async_playwright() as p:
browser = await p.chromium.launch(headless=True)
context = await browser.new_context(
user_agent='CustomUserAgent/1.0',
viewport={'width': 1280, 'height': 720},
geolocation={'longitude': 77.1025, 'latitude': 28.7041},
permissions=['geolocation']
)
page = await context.new_page()
await page.goto('https://example.com')
await page.fill('#username', 'testuser')
await page.click('#login-button')
# More automation steps...
The script needs location data to run headless locally, but it doesn’t work in Lambda. We’re using a Docker image with Lambda layers and a handler.
I’m wondering:
- Are there Playwright limitations in Lambda?
- Why might the function time out?
- What should I know about using Playwright in Lambda?
I’m using Python 3.9, Playwright 1.35.0, and the ap-south-1 region. Any tips to make this work in Lambda would be great!
hey emma, i’ve had similar headaches w/ playwright in lambda. try bumping up the lambda timeout to like 5 mins. also, check ur docker image - make sure it’s got all the playwright stuff. oh and lambda’s tmp dir can be wonky, so try setting userDataDir to ‘/tmp/playwright’ when launching. good luck!
Having worked with Playwright in AWS Lambda, I can share some insights. The main issue you’re facing is likely related to the Lambda execution environment and its limitations.
First, Lambda has stricter resource constraints compared to your local machine. The default timeout is 3 seconds, which is often too short for web automation tasks. Try increasing the timeout in your Lambda configuration to at least 1-2 minutes.
Another common pitfall is the /tmp directory. Lambda’s read-only filesystem can cause issues with browser launches. Ensure you’re setting the {userDataDir: ‘/tmp/playwright’} option when launching the browser.
Regarding geolocation, Lambda’s network setup might interfere. You could try mocking the geolocation API instead of relying on actual permissions.
Lastly, make sure your Docker image includes all necessary dependencies, including browser binaries. The playwright install chromium command should be run during the image build process.
If these don’t solve the issue, consider using AWS X-Ray for tracing to pinpoint where exactly the script is failing or timing out in the Lambda environment.
I’ve encountered similar issues when migrating Playwright scripts to AWS Lambda. One crucial aspect to consider is memory allocation. Lambda’s default memory might not be sufficient for browser automation tasks. Try increasing the allocated memory to at least 1024MB or even 2048MB.
Another point to note is the cold start time in Lambda. The first invocation can take longer, potentially causing timeouts. To mitigate this, you could implement a warm-up function that keeps your Lambda instance active.
It’s also worth checking if all required Playwright dependencies are properly included in your Lambda package. Sometimes, missing libraries can cause unexpected failures in the cloud environment.
Lastly, consider implementing detailed logging throughout your script. This can help pinpoint exactly where the execution is failing or slowing down in the Lambda environment, making troubleshooting much easier.