Topics

Railway•14mo ago

Manually setting PORT for Docker Image

I'm running a docker image (kong) that listens on 8000 by default. As it doesn't use PORT, I have manually added PORT=8000 as a variable (which is mentioned as an alternative in Fixing Common Errors [0] ). When I make a request via public url, I get "Application failed to respond". When I run the same image locally, I can make request to 8000 without an issue, so I'm not sure could have gone wrong. I would appreciate any help! [0] https://docs.railway.app/troubleshoot/fixing-common-errors#application-error-this-application-failed-to-respond

Railway Docs

Fixing Common Errors | Railway Docs

Documentation for Railway

43 Replies

Percy•14mo ago

Project ID: 34a3782b-6485-41f9-923a-6b3b9753ab6e

ChubbyAvocadoOP•14mo ago

project id: 34a3782b-6485-41f9-923a-6b3b9753ab6e

Floris•14mo ago

how is your port defined ? in the docker if you dont need to listen to port8000 then make your kong listen to the env var 'PORT' railway should populate it with their chosen port during deployment

Brody•14mo ago

OP said Kong doesn't use PORT, there is plenty of software that use hardcoded ports, so settings a PORT variable to the same port the software listens on works too @ChubbyAvocado will need more info though, is port 8000 running an http server?

ChubbyAvocadoOP•14mo ago

Yes, it’s an api gateway so it mainly just routes to other http services. Locally I don’t have any issue making http requests to 8000 but something seems messed up with the deployment on railway 😔

Brody•14mo ago

okay then it also needs to be listening on the host 0.0.0.0, Kong probably has some way to configure the host it listens on look into that

ChubbyAvocadoOP•14mo ago

Thanks, I believe the default is 0.0.0.0:8000 (I will double check). https://docs.konghq.com/gateway/latest/reference/configuration/#nginx-section

Kong Docs

Configuration Reference for Kong Gateway - v3.4.x | Kong Docs

Documentation for Kong, the Cloud Connectivity Company for APIs and Microservices.

Brody•14mo ago

there also stuff about SSL and HTTPS, and http2, make sure you only listen on http 1.1 with no SSL of any kind

ChubbyAvocadoOP•14mo ago

As far as I can tell it's http 1.1 only without ssl. 🥲 Any other idea on what else could have gone worng or how to further debug this?

Brody•14mo ago

you have set a PORT service variable to 8000 right?

ChubbyAvocadoOP•14mo ago

yeah!

ChubbyAvocadoOP•14mo ago

No description

Brody•14mo ago

does Kong have a docker image?

ChubbyAvocadoOP•14mo ago

i'm using kong:3.4.2 https://hub.docker.com/_/kong

kong - Official Image | Docker Hub

The Cloud-Native API Gateway for APIs and Microservices

Brody•14mo ago

ill see what i can do kong listens on multiple ports

ChubbyAvocadoOP•14mo ago

right 8000 is for proxy 8001 is admin api 8002 is admin dashboard

Brody•14mo ago

you cant access a railway service publicly from multiple ports

ChubbyAvocadoOP•14mo ago

even if i only need to expose one port?

Brody•14mo ago

if you only care about exposing one port, then it doesnt matter what do you want to expose? the admin gui?

ChubbyAvocadoOP•14mo ago

8000 that's the proxy

Brody•14mo ago

how do you plan on configuring kong if you are exposing the proxy instead of the admin gui

ChubbyAvocadoOP•14mo ago

for now, I can connect to postgres directly (spin up gui locally and connect to railway postgres where kong config is stored). I guess later assuming I can access 8001 internally, the other backend service will send requests to 8001 to control kong.

Brody•14mo ago

their docs suck, send me the page where they list all of the env vars you can use? seriously, these docs sucks https://docs.konghq.com/gateway/latest/production/environment-variables/

ChubbyAvocadoOP•14mo ago

https://github.com/Kong/kong/blob/master/kong.conf.default

GitHub

kong/kong.conf.default at master · Kong/kong

🦍 The Cloud-Native API Gateway . Contribute to Kong/kong development by creating an account on GitHub.

ChubbyAvocadoOP•14mo ago

yeah lol i also tried to find it once and this is the best i found so far

Brody•14mo ago

those arent env vars though

ChubbyAvocadoOP•14mo ago

my understanding is that these map to env var e.g. proxy_listen -> KONG_PORXY_LISTEN

luna•14mo ago

log_level setting -> KONG_LOG_LEVEL env variable

you're missing the KONG prefix

Brody•14mo ago

dumb

luna•14mo ago

but yes those should all map over

ChubbyAvocadoOP•14mo ago

@luna oh yeah that's important 🙏

luna•14mo ago

if you cant get that one working btw this very likely works with envs https://hub.docker.com/r/bitnami/kong/

ChubbyAvocadoOP•14mo ago

I also tried to make some requests via private network (another railway service) just for debugging purposes and that also didn't work... (calling http://${APP_NAME}.railway.internal:8000 from another service). thanks! I don't think env var is an issue here though (based on debug logs and it also connects to the postgres without an issue)

Brody•14mo ago

that for sure wouldnt work, the proxy listens on 0.0.0.0, and ipv4 address but the private network is ipv6 only

ChubbyAvocadoOP•14mo ago

I see 😦

Brody•14mo ago

neither images are behaving

ERROR: /opt/bitnami/kong/bin/kong:6: module 'kong.globalpatches' not found:
no field package.preload['kong.globalpatches']
no file './kong/globalpatches.lua'
no file './kong/globalpatches/init.lua'
no file '/opt/bitnami/kong/openresty/site/lualib/kong/globalpatches.ljbc'
no file '/usr/local/share/lua/5.1/kong/globalpatches.lua'
no file '/usr/local/share/lua/5.1/kong/globalpatches/init.lua'
no file '/opt/bitnami/kong/openresty/luajit/share/lua/5.1/kong/globalpatches.lua'
no file '/opt/bitnami/kong/openresty/luajit/share/lua/5.1/kong/globalpatches/init.lua'
no file '/opt/bitnami/kong/openresty/site/lualib/kong/globalpatches.so'
no file '/opt/bitnami/kong/openresty/lualib/kong/globalpatches.so'
no file './kong/globalpatches.so'
no file '/usr/local/lib/lua/5.1/kong/globalpatches.so'
no file '/opt/bitnami/kong/openresty/luajit/lib/lua/5.1/kong/globalpatches.so'
no file '/usr/local/lib/lua/5.1/loadall.so'
no file '/opt/bitnami/kong/openresty/site/lualib/kong.so'
no file '/opt/bitnami/kong/openresty/lualib/kong.so'
no file './kong.so'
no file '/usr/local/lib/lua/5.1/kong.so'
no file '/opt/bitnami/kong/openresty/luajit/lib/lua/5.1/kong.so'
no file '/usr/local/lib/lua/5.1/loadall.so'
stack traceback:
/opt/bitnami/kong/bin/kong:6: in function 'file_gen'
init_worker_by_lua:47: in function <init_worker_by_lua:45>
[C]: in function 'xpcall'
init_worker_by_lua:54: in function <init_worker_by_lua:52>

ERROR: /opt/bitnami/kong/bin/kong:6: module 'kong.globalpatches' not found:
no field package.preload['kong.globalpatches']
no file './kong/globalpatches.lua'
no file './kong/globalpatches/init.lua'
no file '/opt/bitnami/kong/openresty/site/lualib/kong/globalpatches.ljbc'
no file '/usr/local/share/lua/5.1/kong/globalpatches.lua'
no file '/usr/local/share/lua/5.1/kong/globalpatches/init.lua'
no file '/opt/bitnami/kong/openresty/luajit/share/lua/5.1/kong/globalpatches.lua'
no file '/opt/bitnami/kong/openresty/luajit/share/lua/5.1/kong/globalpatches/init.lua'
no file '/opt/bitnami/kong/openresty/site/lualib/kong/globalpatches.so'
no file '/opt/bitnami/kong/openresty/lualib/kong/globalpatches.so'
no file './kong/globalpatches.so'
no file '/usr/local/lib/lua/5.1/kong/globalpatches.so'
no file '/opt/bitnami/kong/openresty/luajit/lib/lua/5.1/kong/globalpatches.so'
no file '/usr/local/lib/lua/5.1/loadall.so'
no file '/opt/bitnami/kong/openresty/site/lualib/kong.so'
no file '/opt/bitnami/kong/openresty/lualib/kong.so'
no file './kong.so'
no file '/usr/local/lib/lua/5.1/kong.so'
no file '/opt/bitnami/kong/openresty/luajit/lib/lua/5.1/kong.so'
no file '/usr/local/lib/lua/5.1/loadall.so'
stack traceback:
/opt/bitnami/kong/bin/kong:6: in function 'file_gen'
init_worker_by_lua:47: in function <init_worker_by_lua:45>
[C]: in function 'xpcall'
init_worker_by_lua:54: in function <init_worker_by_lua:52>

i give up

ChubbyAvocadoOP•14mo ago

@Brody Thanks for trying!

Brody•14mo ago

sorry i couldnt solve it

ChubbyAvocadoOP•14mo ago

maybe i will try find an alternative this point lol

Brody•14mo ago

caddy

ChubbyAvocadoOP•14mo ago

I'm not familiar with it. Does it support rate-limting and key authentication? (for third-party access) Those were the main reasons for considering Kong.

Brody•14mo ago

im sure you could yeah https://caddyserver.com/

ChubbyAvocadoOP•14mo ago

cool, I will check it out.

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