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devlxd-client.go
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devlxd-client.go
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package main
/*
* An example of how to use lxd's golang /dev/lxd client. This is intended to
* be run from inside a container.
*/
import (
"encoding/json"
"fmt"
"io/ioutil"
"net"
"net/http"
"os"
"github.com/gorilla/websocket"
"gopkg.in/yaml.v2"
)
type devLxdDialer struct {
Path string
}
func (d devLxdDialer) devLxdDial(network, path string) (net.Conn, error) {
addr, err := net.ResolveUnixAddr("unix", d.Path)
if err != nil {
return nil, err
}
conn, err := net.DialUnix("unix", nil, addr)
if err != nil {
return nil, err
}
return conn, err
}
var devLxdTransport = &http.Transport{
Dial: devLxdDialer{"/dev/lxd/sock"}.devLxdDial,
}
func devlxdMonitor(c http.Client) {
dialer := websocket.Dialer{
NetDial: devLxdTransport.Dial,
}
conn, _, err := dialer.Dial("ws://unix.socket/1.0/events", nil)
if err != nil {
return
}
for {
_, data, err := conn.ReadMessage()
if err != nil {
return
}
message := make(map[string]interface{})
err = json.Unmarshal(data, &message)
if err != nil {
return
}
message["timestamp"] = nil
msg, err := yaml.Marshal(&message)
if err != nil {
return
}
fmt.Printf("%s\n", msg)
}
}
func main() {
c := http.Client{Transport: devLxdTransport}
raw, err := c.Get("http://meshuggah-rocks/")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
if raw.StatusCode != http.StatusOK {
fmt.Println("http error", raw.StatusCode)
result, err := ioutil.ReadAll(raw.Body)
if err != nil {
os.Exit(1)
}
fmt.Println(string(result))
}
result := []string{}
if err := json.NewDecoder(raw.Body).Decode(&result); err != nil {
fmt.Println("err decoding response", err)
os.Exit(1)
}
if result[0] != "/1.0" {
fmt.Println("unknown response", result)
os.Exit(1)
}
if len(os.Args) > 1 {
if os.Args[1] == "monitor" {
devlxdMonitor(c)
os.Exit(0)
}
raw, err := c.Get(fmt.Sprintf("http://meshuggah-rocks/1.0/config/%s", os.Args[1]))
if err != nil {
fmt.Println(err)
os.Exit(1)
}
value, err := ioutil.ReadAll(raw.Body)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
fmt.Println(string(value))
} else {
fmt.Println("/dev/lxd ok")
}
}