How can I check the round robin configuration?

[kopax]

Description

I am using traefik v2.1 and I encounter issue with their marathon provider. The IP returned by the round robin operation is an unknown IP owned by my ISP.

I run curl -L -H 'Host: traefik-testing.mydomain.com' http://localhost

Gateway Timeout

Expected result

Use the proper ip retrieved from marathon

Result

Use an unknown ip

Relevant logs

vulcand/oxy/roundrobin/rr: begin ServeHttp on request" Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":null,\"Host\":\"\",\"Path\":\"/\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\"},\"Proto\":\"HTTP/2.0\",\"ProtoMajor\":2,\"ProtoMinor\":0,\"Header\":{\"Accept\":[\"*/*\"],\"User-Agent\":[\"curl/7.64.0\"],\"X-Forwarded-Host\":[\"traefik-testing.mydomain.com\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"dka\"],\"X-Real-Ip\":[\"127.0.0.1\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"traefik-testing.mydomain.com\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"127.0.0.1:41552\",\"RequestURI\":\"/\",\"TLS\":null}"
reverse-proxy_1  | time="2019-12-11T16:36:42Z" level=debug msg="vulcand/oxy/roundrobin/rr: Forwarding this request to URL" Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":null,\"Host\":\"\",\"Path\":\"/\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\"},\"Proto\":\"HTTP/2.0\",\"ProtoMajor\":2,\"ProtoMinor\":0,\"Header\":{\"Accept\":[\"*/*\"],\"User-Agent\":[\"curl/7.64.0\"],\"X-Forwarded-Host\":[\"traefik-testing.mydomain.com\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"dka\"],\"X-Real-Ip\":[\"127.0.0.1\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"traefik-testing.mydomain.com\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"127.0.0.1:41552\",\"RequestURI\":\"/\",\"TLS\":null}" ForwardURL="http://dev-11:31601

504 Gateway Timeout' caused by: dial tcp 212.95.74.75:31601: i/o timeout

vulcand/oxy/roundrobin/rr: completed ServeHttp on request" Request="{\"Method\":\"GET\",\"URL\":{\"Scheme\":\"\",\"Opaque\":\"\",\"User\":null,\"Host\":\"\",\"Path\":\"/\",\"RawPath\":\"\",\"ForceQuery\":false,\"RawQuery\":\"\",\"Fragment\":\"\"},\"Proto\":\"HTTP/2.0\",\"ProtoMajor\":2,\"ProtoMinor\":0,\"Header\":{\"Accept\":[\"*/*\"],\"User-Agent\":[\"curl/7.64.0\"],\"X-Forwarded-Host\":[\"traefik-testing.mydomain.com\"],\"X-Forwarded-Port\":[\"443\"],\"X-Forwarded-Proto\":[\"https\"],\"X-Forwarded-Server\":[\"dka\"],\"X-Real-Ip\":[\"127.0.0.1\"]},\"ContentLength\":0,\"TransferEncoding\":null,\"Host\":\"traefik-testing.mydomain.com\",\"Form\":null,\"PostForm\":null,\"MultipartForm\":null,\"Trailer\":null,\"RemoteAddr\":\"127.0.0.1:41552\",\"RequestURI\":\"/\",\"TLS\":null}

Related issues

• marathon and traefik 2.1 not reading /etc/hosts of container resulting in 504 Gateway timeout traefik/traefik#6001