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frp Docker Image

What is frp

frp is a fast reverse proxy to help you expose a local server behind a NAT or firewall to the internet. Now, it supports tcp, udp, http and https protocol when requests can be forwarded by domains to backward web services.

you can visit https://github.com/fatedier/frp for know more

How to use this image

a config file is necessary for this image, you can read the doc to know how to write it.

Start a frp server

$ docker run -d --network=host -v /path/to/frps.ini:/etc/frp/frps.ini:ro geektr/frp
## `--network=host` means the docker container run on host network

Start a frp client

$ docker run -d --network=host -v /path/to/frpc.ini:/etc/frp/frpc.ini:ro geektr/frp
## `--network=host` means the docker container run on host network

Frp mode

this image can run as both frp server and frp client what it will run depends on environment variables and config file

# /somepath/
# └── config
#     ├── frpc.ini
#     └── frps.ini

# first , it depends depend on config file

$ docker run -d --network=host -v /somepath/config/frps.ini:/etc/frp/frps.ini:ro geektr/frp
# => this command start a frp server

$ docker run -d --network=host -v /somepath/config/frpc.ini:/etc/frp/frpc.ini:ro geektr/frp
# => this command start a frp client

$ docker run -d --network=host -v /somepath/config:/etc/frp:ro geektr/frp
# => this command start both server and client

# you can pass an enviroment variable 'FRP_MODE' to force what it run, 'FRP_MODE' can be set to 'frpc', 'frp-client', 'frps', 'frp-server' and 'both'
$ docker run -d --network=host --env FRP_MODE=frps -v /somepath/config:/etc/frp:ro geektr/frp
# => this command start a frp server

With Docker Compose

when this image runs, it will replace all shell like variables to their environment value, this feature may helps in auto deploy and authority control.

An frp server demo

docker-compose.yml

version: '3'
services:
  frp_server:
    image: geektr/frp
    environment:
      - FRP_SERVER_ADDR=${HOST_IP}
      - FRP_PRIVILEGE_TOKEN=${FRP_TOKEN}
    restart: always
    network_mode: "host"
    volumes:
      - ./frps.ini:/etc/frp/frps.ini:ro

frps.ini

[common]
bind_addr = ${FRP_SERVER_ADDR}
bind_port = 7000
bind_udp_port = 7001
privilege_token = ${FRP_PRIVILEGE_TOKEN}

.env

HOST_IP=xxx.xxx.xxx.xxx
FRP_TOKEN=xxxxxxxxxxxxxxxxxxxx

An frp client demo

tips: local_ip field support hostname, so you can use container_name in frpc.ini

docker-compose.yml

version: '3'
services:
  web_server:
    image: nginx
    container_name: web_server
    expose:
      - "80"
      - "443"
  frp_client:
    image: geektr/frp
    environment:
      - FRP_SERVER_ADDR=${HOST_IP}
      - FRP_PRIVILEGE_TOKEN=${FRP_TOKEN}
    restart: always
    volumes:
      - ./frpc.ini:/etc/frp/frpc.ini:ro

frps.ini

[common]
server_addr = ${FRP_SERVER_ADDR}
server_port = 7000
protocol = kcp
privilege_token = ${FRP_PRIVILEGE_TOKEN}
tcp_mux = true
pool_count = 5

[http]
type = tcp
local_ip = web_server
local_port = 80
remote_port = 80

[https]
type = tcp
local_ip = web_server
local_port = 443
remote_port = 443

.env

HOST_IP=xxx.xxx.xxx.xxx
FRP_TOKEN=xxxxxxxxxxxxxxxxxxxx