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haproxy.go
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haproxy.go
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package haproxy
import (
"bufio"
"fmt"
"net"
"strings"
"github.com/Sirupsen/logrus"
)
type Stat map[string]string
type Monitor struct {
SocketPath string
}
func (h *Monitor) Stats() ([]Stat, error) {
stats := []Stat{}
lines, err := h.runCommand("show stat")
if err != nil {
return nil, err
}
if len(lines) == 0 || !strings.HasPrefix(lines[0], "# ") {
return nil, fmt.Errorf("Failed to find stats")
}
keys := strings.Split(strings.TrimPrefix(lines[0], "# "), ",")
for _, line := range lines[1:] {
if line == "" {
continue
}
values := strings.Split(line, ",")
if len(keys) != len(values) {
logrus.Errorf("Invalid stat line: %s", line)
}
stat := Stat{}
for i := 0; i < len(values); i++ {
stat[keys[i]] = values[i]
}
stats = append(stats, stat)
}
return stats, err
}
func (h *Monitor) runCommand(cmd string) ([]string, error) {
conn, err := net.Dial("unix", h.SocketPath)
if err != nil {
return nil, err
}
defer conn.Close()
_, err = conn.Write([]byte(cmd + "\n"))
if err != nil {
return nil, err
}
result := []string{}
scanner := bufio.NewScanner(conn)
for scanner.Scan() {
result = append(result, scanner.Text())
}
return result, scanner.Err()
}