Forwarder¶
A forwarder consists of one or more nodes (node group) and a node selector. Forwarders are mainly used to define target nodes and forwarding policies in port forwarding and reverse proxy.
Usage¶
Similar to hop, forwarders can be used in two ways: inline mode and reference mode.
Inline Mode¶
Node group and selector can be defined directly in the forwarder.
services:
- name: service-0
addr: :8080
handler:
type: tcp
listener:
type: tcp
forwarder:
nodes:
- name: target-0
addr: 192.168.1.1:80
- name: target-1
addr: 192.168.1.2:80
- name: target-2
addr: 192.168.1.3:8080
selector:
strategy: round
maxFails: 1
failTimeout: 30s
Reference Mode¶
The forwarder can also reference hop through the forwarder.hop option. In reference mode, the target nodes can be dynamically updated with the help of the hop's external data source and plugin.
services:
- name: service-0
addr: ":8080"
handler:
type: tcp
listener:
type: tcp
forwarder:
hop: hop-0
hops:
- name: hop-0
nodes:
- name: target-0
addr: 192.168.1.1:8080
- name: target-1
addr: 192.168.1.2:8080