The uninstrumented gateways are not instrumented by SkyWalking agent plugin when they are started, but they can be configured in gateways.yml file or via Dynamic Configuration. The reason why they can‘t register to backend automatically is that there’re no suitable agent plugins, for example, there is no agent plugins for Nginx, haproxy, etc. So in order to visualize the real topology, we provide a way to configure the gateways/proxies manually.
The configuration content includes the gateways' names and their instances:
gateways: - name: proxy0 # the name is not used for now instances: - host: 127.0.0.1 # the host/ip of this gateway instance port: 9099 # the port of this gateway instance, defaults to 80
Note that the host of the instance must be the one that is actually used in client side, for example, if the instance proxyA has 2 IPs, say 192.168.1.110 and 192.168.1.111, both of which delegates the target service, and the client connects to 192.168.1.110, then configuring 192.168.1.111 as the host won't work properly.