Saturday, Jan 21, 2017


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What is go-logsink

go-logsink is a client and server application to aggregate multiple streams into one.

It does so by sending all data piped into the client to the server.


To start a server just type go-logsink listen. By default the server listens on port 50051. You can change the default binding definition using the bind flag:

go-logsink listen --bind ":55555"

In this sample, the server would listen on port 55555.

To send data to the server you have to start at least one client. For example to send the syslog to the server:

sudo tail -f /var/log/syslog | go-logsink connect --address "localhost:55555"

Using the address flag it is possible to send data to the non default destination (localhost:50051)

An advanced usage would be to forward all logs from running docker containers:

for cont in `docker ps -q`; do
    docker logs -f $cont | go-logsink connect &

This assumes a running go-logsink server at localhost:50051

You can even start a webserver using

go-logsink web

More usage: See go-logsink documentation


DEPRECATED Recommended solution is to use go-logsing listen ... | go-logsing connect ...

If you want to forward data from one network to another you can do this using the relay method.

|--------|      |-------|      |--------|
| client | ---> | relay | ---> | server |
|--------|      |-------|      |--------|

Simple put: a relay is an instance acting as both a server and a client.

Create a server on your-machine:

go-logsink listen --bind ":50051"

Create a relay on man-in-the-middle:

go-logsink relay --bind ":50051" --address "your-machine:50051"

Create a client on server:

go-logsink connect --address "man-in-the-middle:50051"


The applicatin uses a very simple protocol buffer based RPC service to communicate. You should install Protocol Buffers v3.1.0 from https://github.com/google/protobuf/releases/tag/v3.1.0 ( used to create this project initially ).

The Makefile contains a protobuf target which creates the implementation from the specification ( located in logsink/logsink.proto ).

The project uses govendor ( https://github.com/kardianos/govendor ) to populate the vedor directory. Use govendor sync to download the libraries. This can take quite a while.

Cross compiling Windows

current state: untested binary

You have to go get github.com/inconshreveable/mousetrap before you can crosscompile.


You can crosscompile OSX or download the darwin.tgz from the releases. Rudimentary tests were done, no in depth testing, though



Version Description
v1.1.0 Web included in binary
Deprecated relaying
Added prometheus metrics
v1.0.2 Graceful shutdown
v1.0.1 go-ps
v1.0.0 New versioning scheme
Lockfile support
Added .editorconfig
20170124 Forcing display space usage
Allow toggling of scroll
Add a --break switch to connect
Enabling CORS
Supporting SSL behind a proxy
Added --pass-through switch on connect to pass text to stdout
Allow changing the line limit in web
Breaking on web for pre element
Filtering in web
20170117 Web endpoint
doc command
version command
Allow providing a prefix
20170110 Initial version