Cloudflare Developers•3y ago

By the way, can people learn nodejs then write Workers?

Ffernvenue By the way, can people learn nodejs then write Workers?

dave•12/8/23, 1:06 AM

I would recommend doing the other way around so you don't pick up bad habits

fernvenueOP•12/8/23, 1:07 AM

Great, thanks.

fernvenueOP•12/8/23, 1:13 AM

@dave | ai.moda Will you recommend people to learn Node.js if they gonna build huge Workers project? Or MDN and Workers docs enough?

Ffernvenue @dave | ai.moda Will you recommend people to learn Node.js if they gonna build h...

dave•12/8/23, 1:13 AM

MDN and Workers docs are enough

Constantin•12/8/23, 1:13 AM

huys, i'm a bit confused about how to setup the CF Actions for workers. In the docs it just says .yml file .. i added in the project root. noting happens in github interface.

Ddave MDN and Workers docs are enough

fernvenueOP•12/8/23, 1:13 AM

Thanks.

Constantin•12/8/23, 1:14 AM

if i move it inside .git/workflows/deploy.yml .. nothing happens

Constantin•12/8/23, 1:15 AM

- name: Deploy to Cloudflare Workers with Wrangler
  uses: cloudflare/wrangler-action@v3.3.2

name: Deploy

on:
  push:
    branches:
      - main

jobs:
  deploy:
    runs-on: ubuntu-latest
    name: Deploy
    steps:
      - uses: actions/checkout@v3
      - name: Deploy
        uses: cloudflare/wrangler-action@v3
        with:
          apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}

- name: Deploy to Cloudflare Workers with Wrangler
  uses: cloudflare/wrangler-action@v3.3.2

name: Deploy

on:
  push:
    branches:
      - main

jobs:
  deploy:
    runs-on: ubuntu-latest
    name: Deploy
    steps:
      - uses: actions/checkout@v3
      - name: Deploy
        uses: cloudflare/wrangler-action@v3
        with:
          apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}

this is how it looks

CConstantin if i move it inside .git/workflows/deploy.yml .. nothing happens

Cyb3r-Jak3•12/8/23, 1:15 AM

Should be

.github/workflows/deploy.yml

.github/workflows/deploy.yml

Constantin•12/8/23, 1:20 AM

great! thank you

Constantin•12/8/23, 1:21 AM

and for branching, is fine to deploy a new worker for each branch, right?

Constantin•12/8/23, 1:22 AM

i thoth that workers share the same model of branching like pages, but they are standalone entities, is that correct?

Cyb3r-Jak3•12/8/23, 1:39 AM

Yeah you could create a new worker for each branch. Just have to remember to delete them after merging so you don't run out of workers

Constantin•12/8/23, 1:54 AM

they don't get overwritted ?

Constantin•12/8/23, 1:54 AM

i mean, how can downtimes can be avoided

Cyb3r-Jak3•12/8/23, 1:56 AM

If the workers share the same name then yeah it will be overwritten

Constantin•12/8/23, 1:57 AM

great then!

Constantin•12/8/23, 1:57 AM

thank you @Cyb3r-Jok3

Constantin•12/8/23, 2:45 AM

is there a way to block wrangler deploy command to be used locally?

monkev_see_monkev_do•12/8/23, 5:07 AM

Has anyone ever had the Worker Preview [in the online UI] not work? Troubleshooting this issue, but it’s very odd

Unsmart•12/8/23, 5:07 AM

What do you mean by "not work"

UUnsmart What do you mean by "not work"

monkev_see_monkev_do•12/8/23, 5:08 AM

It’s just not showing the URL, for example if you type in Google.com, you would expect the site to load.

monkev_see_monkev_do•12/8/23, 5:11 AM

James•12/8/23, 7:37 AM

How do you enable Durable Objects? The link is useless.

Erisa•12/8/23, 8:57 AM

Go to a Worker in your dashboard, scroll down on the overview and there should be a Durable Objects section with an enable button

kian•12/8/23, 2:05 PM

The vast majority of that isn't in workerd

kian•12/8/23, 2:06 PM

You'd see the

.h

.h

stuff and maybe some

workerd

workerd

specific overrides, but most of it is defined in Cloudflare's internal repository.

kian•12/8/23, 2:09 PM

There's weird things like requests can have 6 concurrent subrequests, but your isolate does have an overall limit (which you can hit with enough rps but not reading response bodies).

kian•12/8/23, 2:09 PM

It leads to weird scenarios where you're reading the response body even if to discard it instantly (i.e not assigning it to a variable).

kian•12/8/23, 2:11 PM

You can see the same sort of behaviour with Service Bindings

kian•12/8/23, 2:11 PM

If you make a call to a bound service but don't read the body, the bound Worker will show

Canceled

Canceled

for that request in tail.

kian•12/8/23, 2:12 PM

Since they're effectively held open, in the event you do consume the body later, you can hit a limit for that isolate.

kian•12/8/23, 2:13 PM

As for resources on a bound Worker, yeah it's in the same isolate so memory is the primary concern as you get a refreshed CPU limit (i.e on Bundled you get another 50ms to spend in that bound Worker).

kian•12/8/23, 2:14 PM

Exceeding resources tends to make the isolate go

but I haven't tested it with a bound Worker.

Hello, I’m Allie!•12/8/23, 2:14 PM

Is there a method for black holing a Response Body?

kian•12/8/23, 2:15 PM

You'd want to store an ID in the global scope of the calling Worker as well as the ID of that Cloudflare server (call

https://cloudflare.com/cdn-cgi/trace

https://cloudflare.com/cdn-cgi/trace

and store the

fl

fl

line), call a bound Worker that exceeds resource limits & hit the Worker until you see the same fl line. If your id is different, it's a new isolate.

kian•12/8/23, 2:15 PM

The

fl

fl

part is because your Worker is a per-server thing, so you might hit two different servers in the same colo which are different isolates.

kian•12/8/23, 2:16 PM

That's the primary reason that trying to reason about memory consumption, or using global variables for state, is pretty difficult on Workers.

kian•12/8/23, 2:16 PM

Your connection might have a keep-alive to that server (i.e a browser) or you might hit a new server everytime (i.e hard refresh, spamming it w/ curl, etc)

kian•12/8/23, 2:17 PM

I've had isolates that sit idle on a given server for 22+ hours since their last request during off hours.

kian•12/8/23, 2:19 PM

I believe the isolate would hang around, just that request is cancelled.

kian•12/8/23, 2:20 PM

1101 (exception) only kills the request, 1102 (resources) kills the isolate.

- name: Deploy to Cloudflare Workers with Wrangler uses: cloudflare/wrangler-action@v3.3.2 name: Deploy on: push: branches: - main jobs: deploy: runs-on: ubuntu-latest name: Deploy steps: - uses: actions/checkout@v3 - name: Deploy uses: cloudflare/wrangler-action@v3 with: apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}

By the way, can people learn nodejs then write Workers?

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