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rpcserver: forward gRPC proxy requests to localhost when listening on all interfaces #2247

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merged 1 commit into from
Jan 23, 2019
Merged

rpcserver: forward gRPC proxy requests to localhost when listening on all interfaces #2247

merged 1 commit into from
Jan 23, 2019

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wpaulino
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This prevents certificate issues when accessing the gRPC REST proxy externally.

Fixes #1567.

@Roasbeef Roasbeef added gRPC networking P3 might get fixed, nice to have needs review PR needs review by regular contributors needs testing PR hasn't yet been actively tested on testnet/mainnet labels Dec 3, 2018
@leshik
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leshik commented Dec 16, 2018

@wpaulino Just wanted to drop a note that I've patched my lnd instance with this PR and it works ok for me in Docker with wildcard RPC addresses. Hope that more people (@NicolasDorier @dennisreimann @zwarbo) try it so it could find its way to master.

@NicolasDorier
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I don't understand, this PR seems to transform 0.0.0.0 to 127.0.0.1, this is not what I want.

@leshik
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leshik commented Dec 17, 2018 •
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@NicolasDorier It does this internally so the REST-to-gRPC proxy goes to the same host where LND is running (and since it's the same single binary, i.e. proxy and gRPC can't be on different hosts, it always works with 127.0.0.1). It doesn't bind REST endpoint to loopback. So it will fix the issue you were facing.

@NicolasDorier
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Oh I get it! thanks a lot, will test.

@jamaljsr
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I also ran into the "authentication handshake failed" error on my remote node, trying to setup the joule extension. I manually patched lnd with these changes, rebuilt and now the REST api works as expected. Thanks @wpaulino 👍

@joostjager
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This issue also showed up in related PR #2428.

cfromknecht
cfromknecht previously approved these changes Jan 9, 2019
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LGTM! 👻

halseth
halseth previously approved these changes Jan 16, 2019
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LGTM :D

rpcserver.go
@@ -533,9 +533,17 @@ func (r *rpcServer) Start() error {
// TODO(roasbeef): eventually also allow the sub-servers to themselves
// have a REST proxy.
mux := proxy.NewServeMux()
grpcEndpoint := cfg.RPCListeners[0].String()
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nit: add a comment why this string replacing is needed.

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Done.

@wpaulino
rpcserver: forward gRPC proxy requests to localhost when listening on…
552b71c 
… all interfaces

This prevents certificate issues when accessing the gRPC REST proxy externally.
@wpaulino wpaulino dismissed stale reviews from halseth and cfromknecht via 552b71c January 22, 2019 00:07
cfromknecht
cfromknecht approved these changes Jan 23, 2019
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LGTM! 🦁

@wpaulino wpaulino merged commit 9860df6 into lightningnetwork:master Jan 23, 2019
@wpaulino wpaulino deleted the grpc-proxy-endpoint branch January 23, 2019 00:21
@joostjager joostjager mentioned this pull request Jan 24, 2019
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@wpaulino wpaulino mentioned this pull request Mar 19, 2019
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@wereHamster wereHamster mentioned this pull request Mar 20, 2019
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@wpaulino wpaulino mentioned this pull request Apr 4, 2019
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@cfromknecht cfromknecht cfromknecht approved these changes

@halseth halseth halseth approved these changes

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8 participants
@wpaulino @leshik @NicolasDorier @jamaljsr @joostjager @cfromknecht @halseth @Roasbeef