Getting proxy error i/o timeout

[iRay]

Hello and first of all thank you for ReProxy)
I’ve encountered an issue: getting "proxy error" i/o timeout.

Could you please take a look what I'm doing wrong?
On localhost I run Gatus service with docker-compose:

version: "3.9"
services:
  gatus:
    image: twinproduction/gatus:latest
    hostname: gatus
    container_name: gatus
    restart: always
    ports:
      - "8080:8080"
    volumes:
      - ./data.yml:/config/gatus.yml

And then run reproxy with docker-compose:

version: "3.9"
services:
  reproxy:
    image: umputun/reproxy:master
    container_name: reproxy
    hostname: reproxy
    ports:
      - "80:8080"
      - "8081:8081"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock:ro
    environment:
      - LISTEN=0.0.0.0:8080
      - DOCKER_ENABLED=true
      - DOCKER_AUTO=true
      - DEBUG=true
      - MGMT_ENABLED=true

I see that gatus container is discoverable for reproxy:

[INFO]  {discovery/discovery.go:140 discovery.(*Service).Run} proxy  docker: * ^/gatus/(.*) -> http://192.168.80.2:8080/$1

{
  "*": [
    {
      "route": "^/gatus/(.*)",
      "destination": "http://192.168.80.2:8080/$1",
      "server": "*",
      "match": "proxy",
      "provider": "docker",
      "ping": "http://192.168.80.2:8080/ping"
    }
  ]
}

But when I go to http://localhost/gatus/api/v1/endpoints/statuses I'm getting:

[DEBUG] {proxy/proxy.go:246 proxy.(*Http).proxyHandler.func2} proxy to http://192.168.80.2:8080/api/v1/endpoints/statuses
[WARN]  {lgr/adaptor.go:16 lgr.(*Writer).Write} http: proxy error: dial tcp 192.168.80.2:8080: i/o timeout

If I use compiled version of reproxy instead of docker then everything works as expected.

P.S.
Here is some debug information that might be useful:

[DEBUG] {app/main.go:151 main.main} options: {
Listen:0.0.0.0:8080 
MaxSize:64K 
GzipEnabled:false 
ProxyHeaders:[] 
DropHeaders:[] 
AuthBasicHtpasswd: 
LBType:random 
SSL:{Type:none Cert: Key: ACMELocation:./var/acme ACMEEmail: RedirHTTPPort:0 FQDNs:[]} 
Assets:{Location: WebRoot:/ SPA:false CacheControl:[] NotFound:} 
Logger:{StdOut:false Enabled:false FileName:access.log MaxSize:100M MaxBackups:10} 
Docker:{Enabled:true Host:unix:///var/run/docker.sock Network: Excluded:[] AutoAPI:true APIPrefix:} 
ConsulCatalog:{Enabled:false Address:http://127.0.0.1:8500 CheckInterval:1s} 
File:{Enabled:false Name:reproxy.yml CheckInterval:3s Delay:500ms} 
Static:{Enabled:false Rules:[]} 
Timeouts:{ReadHeader:5s Write:30s Idle:30s Dial:30s KeepAlive:30s ResponseHeader:5s IdleConn:1m30s TLSHandshake:10s ExpectContinue:1s} 
Management:{Enabled:true Listen:0.0.0.0:8081} 
ErrorReport:{Enabled:false Template:} 
HealthCheck:{Enabled:false Interval:5m0s} 
Throttle:{System:0 User:0} 
Plugin:{Enabled:false Listen:127.0.0.1:8081} 
Signature:false Dbg:true}

[umputun]

I think, the issue here is two distinct docker networks and this is why reproxy can't access your application (gatus) on 192.168.80.2

you need to add this section to your reproxy compose:

networks:
  proxy:
    external:
      name: reproxy

and modify the application compose to allow the access by adding networks:

        networks:
            - proxy
            - default

see https://docs.docker.com/compose/networking/ for more details

[iRay]

O.. yes, you’re right. I hadn’t thought of docker network. Thank you!