A down to earth tcp router based on traefik tcp streaming and supports multiple backends using valkyrie
git clone https://github.com/xmonader/tcprouter
cd tcprouter
go build
go get -u github.com/xmonader/tcprouter
configfile: router.toml
[server]
addr = "0.0.0.0"
port = 443
httpport = 80
[server.dbbackend]
type = "redis"
addr = "127.0.0.1"
port = 6379
refresh = 10
[server.services]
[server.services."www.google.com"]
addr = "172.217.19.46"
tlsport = 443
httpport = 80
then
./tcprouter router.toml
Please notice if you are using low numbered port like 80 or 443 you can use sudo or setcap before running the binary.
sudo ./tcprouter router.toml
- setcap:
sudo setcap CAP_NET_BIND_SERVICE=+eip PATH_TO_TCPROUTER
We have two toml sections so far
[server]
addr = "0.0.0.0"
port = 443
httpport = 80
in [server]
section we define the listening interface/port the tcprouter intercepting: typically that's 443 for TLS connections.
[server.dbbackend]
type = "redis"
addr = "127.0.0.1"
port = 6379
refresh = 10
in server.dbbackend
we define the backend kv store and its connection information addr,port
and how often we want to reload the data from the kv store using refresh
key in seconds.
127.0.0.1:6379> KEYS *
1) "/tcprouter/services/www.bing.com"
2) "/tcprouter/services/www.google.com"
3) "/tcprouter/services/www.facebook.com"
127.0.0.1:6379> get /tcprouter/services/www.google.com
"{\"Key\":\"tcprouter/services/www.google.com\",\"Value\":\"eyJhZGRyIjogIjE3Mi4yMTcuMTkuNDYiLCAiaHR0cHBvcnQiIDgwLCAidGxzcG9ydCI6IDQ0M30=\",\"LastIndex\":75292246}"
In [64]: res = r.get("/tcprouter/service/www.google.com")
In [65]: decoded = json.loads(res)
In [66]: decoded
Out[66]:
{'Key': '/tcprouter/service/www.google.com',
'Value': 'eyJhZGRyIjogIjE3Mi4yMTcuMTkuNDYiLCAiaHR0cHBvcnQiIDgwLCAidGxzcG9ydCI6IDQ0M30='}
Value
payload is base64 encoded because of how golang is marshaling.
In [67]: base64.b64decode(decoded['Value'])
Out[67]: b'{"addr": "172.217.19.46", "httpport" 80, "tlsport": 443}'
This example can be found at examples/main.go
package main
import (
"encoding/json"
"log"
"time"
"github.com/abronan/valkeyrie"
"github.com/abronan/valkeyrie/store"
"github.com/abronan/valkeyrie/store/redis"
)
func init() {
redis.Register()
}
type Service struct {
Addr string `json:"addr"`
SNI string `json:"sni"`
Name string `json:"bing"`
}
func main() {
// Initialize a new store with redis
kv, err := valkeyrie.NewStore(
store.REDIS,
[]string{"127.0.0.1:6379" },
&store.Config{
ConnectionTimeout: 10 * time.Second,
},
)
if err != nil {
log.Fatal("Cannot create store redis")
}
google := &Service{Addr:"172.217.19.46:443", SNI:"www.google.com", Name:"google"}
encGoogle, _ := json.Marshal(google)
bing := &Service{Addr:"13.107.21.200:443", SNI:"www.bing.com", Name:"bing"}
encBing, _ := json.Marshal(bing)
kv.Put("/tcprouter/services/google", encGoogle, nil)
kv.Put("/tcprouter/services/bing", encBing, nil)
}
import base64
import json
import redis
r = redis.Redis()
def create_service(name, sni, addr):
service = {}
service['Key'] = '/tcprouter/service/{}'.format(name)
record = {"addr":addr, "sni":sni, "name":name}
json_dumped_record_bytes = json.dumps(record).encode()
b64_record = base64.b64encode(json_dumped_record_bytes).decode()
service['Value'] = b64_record
r.set(service['Key'], json.dumps(service))
create_service('facebook', "www.facebook.com", "102.132.97.35:443")
create_service('google', 'www.google.com', '172.217.19.46:443')
create_service('bing', 'www.bing.com', '13.107.21.200:443')
If you want to test that locally you can modify /etc/hosts
127.0.0.1 www.google.com
127.0.0.1 www.bing.com
127.0.0.1 www.facebook.com
So your browser go to your 127.0.0.1:443
on requesting google or bing.
to add a global catch all
service
python3 create_service.py CATCH_ALL 'CATCH_ALL' '127.0.0.1:9092'