DOs that do not have any external state (used the storage API) can be garbage collected and restarte

DOs that do not have any external state (used the storage API) can be garbage collected and restarted at some other point.

But if I am not mistaken we did have an issue in LAX recently, so it may have been a fail-over indeed. And SJC being the copy with the data now.
And you are correct in that a DO will not leave the cluster it is currently part of, so it won't move from the US to the EU etc.

IItsWendell Do console logs show up in `wranger tail` for durable workers? Doesn't look like...

ErwinOP•8/6/21, 7:35 AM

No, they do not unfortunately..

ItsWendell•8/6/21, 7:46 AM

Is websocket to websocket communication possible from Durable Workers to Workers?

EErwin DOs that do not have any external state (used the storage API) can be garbage co...

Hello, I’m Allie!•8/6/21, 8:16 AM

Will DO's be able to migrate themselves at some point?

HHello, I’m Allie!Will DO's be able to migrate themselves at some point?

ErwinOP•8/6/21, 8:17 AM

That is certainly part of the vision for DOs, but that won't be part of the first release I would imagine..

EErwin That is certainly part of the vision for DOs, but that won't be part of the firs...

Hello, I’m Allie!•8/6/21, 8:17 AM

Probably a bit of finagling to get it GDPR-Compliant...

IItsWendell Is websocket to websocket communication possible from Durable Workers to Workers...

ItsWendell•8/6/21, 8:30 AM

I've tried this in multiple ways now but can't get it to work. In short, I have a worker which manages incoming websocket connections for GraphQL subscriptions. Once a subscription comes in for a specific chatroom, a connection needs to be opened (or forwarded) to that durable object of that specific chatroom.

The fetch method of stubs don't seem to return a webSocket, created and passed down as response on the durable object.
I can't seem to pass a websocket to the durable object

Any tips? Is this at all possible?

HHello, I’m Allie!Probably a bit of finagling to get it GDPR-Compliant...

ErwinOP•8/6/21, 8:32 AM

It is already possible to restrict DOs only to EU colos.. https://developers.cloudflare.com/workers/runtime-apis/durable-objects#restricting-objects-to-a-jurisdiction

It isn't possible to automatically migrate a DO after it is created, especially if it has stored data already.

ErwinOP•8/6/21, 8:33 AM

I don't have a lot of experience with the websocket side of things @itswendell, but I feel it should absolutely be possible?

EErwin It is already possible to restrict DOs only to EU colos.. https://developers.clo...

Hello, I’m Allie!•8/6/21, 8:33 AM

On the finagling, I meant getting the auto-migration to be GDPR-Compliant.

HHello, I’m Allie!On the finagling, I meant getting the auto-migration to be GDPR-Compliant.

ErwinOP•8/6/21, 8:34 AM

Oh no.. that is the easy part for a change

.. the technical challenges are way harder tbh..

EErwin Oh no.. that is the easy part for a change 😄 .. the technical challenges are wa...

Hello, I’m Allie!•8/6/21, 8:34 AM

My brain hurts just thinking about it.

HHello, I’m Allie!My brain hurts just thinking about it.

ErwinOP•8/6/21, 8:35 AM

So does mine, so I am glad we have an amazing team working on that tbh..

EErwin It is already possible to restrict DOs only to EU colos.. https://developers.clo...

Hello, I’m Allie!•8/6/21, 8:36 AM

So when you say it can't auto-migrate, does that mean that if a DO is initialize spawned in the US, but later terminated(Not Wiped), it can never be recreated in Europe?

EErwin I don't have a lot of experience with the websocket side of things @itswendell, ...

ItsWendell•8/6/21, 9:20 AM

I'm not so sure about that, I think the tricky thing is is that the connection comes starts in the Worker. The Worker creates and start's listening to WebSocket events with the client. Once a websocket event comes in that subscribes to a specific chatroom channel, I need to somehow communicate from the Worker to the Durable Object in real-time.

I can't start a client / server from the Worker since there is no way I can pass the client in a Fetch request to the Durable Object.
I can't start a client / server from the Durable Object, since the response of the durable object with fetch, doesn't include the webSocket.

ErwinOP•8/6/21, 9:21 AM

That is correct. (Assuming it saved something to storage). If it didn’t save something to storage I believe it could.

IItsWendell I'm not so sure about that, I think the tricky thing is is that the connection c...

ItsWendell•8/6/21, 11:03 AM

Actually, I think I just made it work

JJohn Spurlock one way is to fetch `https://1.1.1.1/cdn-cgi/trace` from inside the DO, and cach...

ItsWendell•8/6/21, 11:52 AM

Is there are a package / endpoint to make the

colo

colo

field more human readable?

IItsWendell Is there are a package / endpoint to make the `colo` field more human readable?

John Spurlock•8/6/21, 12:08 PM

I believe they are standard IATA airport codes (https://en.wikipedia.org/wiki/IATA_airport_code) but that list posted yesterday (https://speed.cloudflare.com/locations) would be a nice cf-specific endpoint to use, for as long as it's around

IATA airport code

An IATA airport code, also known as an IATA location identifier, IATA station code, or simply a location identifier, is a three-letter geocode designating many airports and metropolitan areas around the world, defined by the International Air Transport Association (IATA). The characters prominently displayed on baggage tags attached at airport ...

JJohn Spurlock I believe they are standard IATA airport codes (https://en.wikipedia.org/wiki/IA...

ItsWendell•8/6/21, 12:24 PM

Thanks that helps, I think I'll try a simple free API reverse geocoding API for now, see how that works.

Wallacy•8/6/21, 12:51 PM

Any plan to activate any DO here on SouthAmerica? It’s bad to always be routes to US … that ads to much latency that makes hard to test our software for any regression.

ErwinOP•8/6/21, 2:56 PM

You get a specific bank of CPU time after every message. So I think if you don't send any messages, it will run out and terminate the DO at some point?

WWallacy Any plan to activate any DO here on SouthAmerica? It’s bad to always be routes t...

ErwinOP•8/6/21, 2:58 PM

I am sure we would love to activate DOs in more regions world-wide, but the requirements are to have multiple high quality dcs close together with multiple reliable network connections. And those are hard to find in areas like South America. I know exactly how you feel in Australia

ItsWendell•8/6/21, 3:07 PM

Is there a list of locations for DOs? Whenever I create one in amsterdam it seems to be spawning in France. (according to reverse geocoding the IP of the DO).

ItsWendell•8/6/21, 3:08 PM

Do DOs auto migrate to a location once certain users from a specific location start using it more?

ItsWendell•8/6/21, 3:15 PM

This was something that is planned for later right?

EErwin I am sure we would love to activate DOs in more regions world-wide, but the requ...

Wallacy•8/6/21, 3:15 PM

They open 25 new locations here on Brazil. But 100% of our workers traffic is only on one colo (GRU)…. I always assumed that we will get at last one DO location here. Because of not, it’s better to stick with something on google, aws or azure that’s full range products here.

EErwin I am sure we would love to activate DOs in more regions world-wide, but the requ...

Wallacy•8/6/21, 3:15 PM

Wallacy•8/6/21, 3:18 PM

I can live with aditional latency in while our app is in beta. But I was (maybe naively expecting) to got anything close before the end of the year.

IItsWendell I've tried this in multiple ways now but can't get it to work. In short, I have ...

codefrau•8/6/21, 3:24 PM

Make the chat room id part of the web socket request url to the worker. Then pass that same request to the DO stub’s fetch(). That way the web socket connection gets forwarded to the DO.

IItsWendell Is there a list of locations for DOs? Whenever I create one in amsterdam it seem...

codefrau•8/6/21, 3:25 PM

https://where.durableobjects.live/

Kuririn•8/6/21, 3:26 PM

Is there a way to get rid of the cold starts on the durable objects? When there is no request for a while it takes longer time.

EErwin I am sure we would love to activate DOs in more regions world-wide, but the requ...

codefrau•8/6/21, 3:27 PM

Wait. Are you saying DOs will not be available in every colo even after GA?

EErwin DOs that do not have any external state (used the storage API) can be garbage co...

codefrau•8/6/21, 3:31 PM

I’d have expected that DO to jump back to LAX, where it was originally. But it seems to now prefer to live in SJC. Is that to be expected for “named” DOs? That would make some sense since the DO’s location is cached in other colos.

Ccodefrau I’d have expected that DO to jump back to LAX, where it was originally. But it s...

Matt Silverlock•8/6/21, 3:33 PM

durable-objects (from the source of truth)

MMatt Silverlock https://discord.com/channels/595317990191398933/773219443911819284/8721994302652...

codefrau•8/6/21, 3:38 PM

Okay makes sense. What about DOs with unique IDs though? Their location doesn’t have to be cached, that was part of the design. Is that still true? Meaning even if that DO was temporarily resumed on another colo, would it “snap back” to the colo encoded one that is operational again?

Ccodefrau Okay makes sense. What about DOs with unique IDs though? Their location doesn’t ...

Matt Silverlock•8/6/21, 3:39 PM

@kentonv_cf is best positioned to chime in when he’s back, but I assume you’re seeing it stay in SJC after maintenance moved it from LAX?

MMatt Silverlock @kentonv_cf is best positioned to chime in when he’s back, but I assume you’re s...

codefrau•8/6/21, 3:42 PM

Exactly.

MMatt Silverlock @kentonv_cf is best positioned to chime in when he’s back, but I assume you’re s...

kenton•8/6/21, 3:47 PM

TBH @brett_h knows the internals better than I do, but IIRC this is a known issue right now where after a failover to a different colo, we don't proactively migrate the object back.