How to connect from one app to another, via the internal network?

[shrey]

How to do i connect to app A from app B, via the internal cloudron network?

Not sure if the ip address given by ifconfig is consistent across instance restarts.

Also, tried host.docker.internal & localhost.... didn't work.

[girish]

@shrey you can use the app id as the host name. You can also get the raw ip by running ip addr in the web terminal of the app.

app id is preferred if that works because the ip might change because of platform changes.

[shrey]

@girish

Currently, the url http://<app id> seems to be reachable only from the terminal (e.g. of another app).

If i try to reach this url from inside the other internal app (e.g. access the directus url via n8n, both on the same cloudron), i receive the error:

NodeApiError: The service refused the connection - perhaps it is offline
connect ECONNREFUSED fd00:c107:d509::56:8055

PS: The url http://<app-internal-ip> works fine

[andreasdueren]

Curious to hear what your use case for this is

[shrey]

@andreasdueren
Sure,

@shrey said in How to connect from one app to another, via the internal network?:

e.g. access the directus url via n8n

[girish]

@shrey said in How to connect from one app to another, via the internal network?:

PS: The url http://<app-internal-ip> works fine

If you run host <app id> , it will resolve to the internal IP. So, I am not sure why it's not working with app id. But it works for me here. For example:

# curl -L http://dfa81ea4-9a21-4a58-9283-05c5fef1161b | wc -l
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100 16067  100 16067    0     0  42339      0 --:--:-- --:--:-- --:--:--  382k
75

[girish]

Note that depending on the app, you might have to query a different port i.e the port it is listening on.

# curl -L http://12aded8a-8c78-4b6c-bdbe-2d549b1c2eb5:3000 | wc -c
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100    11    0    11    0     0   1412      0 --:--:-- --:--:-- --:--:--  1571
100    11    0    11    0     0    417      0 --:--:-- --:--:-- --:--:--   417
100  143k  100  143k    0     0  1464k      0 --:--:-- --:--:-- --:--:-- 1464k
147314

Directus listens on port 8055 and n8n on port 5678