linkered-tcp is a TCP proxy useed by the linkerd service mesh network. This example is using it as a standalone TCP proxy, without the rest of the linkerd functions. The only other function which is needed is namerd which is used for service discovery. In our test, service discovery is not needed, and the mapping between the service and its address is done staticaly. However, the namerd function is still mandatory for the linkerd-tcp process.
Following things needs to be installed on the machine:
rust: linkerd-tcp is implemented in rustcargo: build and dependency tool for rustdocker: the echo server runs inside dockerjava: namerd (as well as rest of linkerd) is implemented in scala
Run ./get-linkerd.sh, this will clone the linkerd-tcp repo, and build it using cargo, and then will download namerd.
Run ./setup.sh to start namerd, linkerd-tcp and a docker container running a TCP echo server
Run ./setup.sh to stop namerd, linkerd-tcp and the docker container
Run nc 127.0.0.1 5555 to see that the server works via the proxy. To check that it works by itself use: nc 127.0.0.1 5556
Note that file based namer is configured in the system (io.l5d.fs using the disco directory), however, the directory is empty, and the mapping between the echo service and its actual IP/port (127.0.0.1:5556) is done statically in namerd.yml