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consul_status.go
57 lines (49 loc) · 1.17 KB
/
consul_status.go
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package discovery
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
)
const (
statusLeaderPath = "/v1/status/leader" // Returns the current Raft leader
)
// Leader interface
type Leader interface {
Status(addr, path string) (string, error)
}
// GetStatus function to get the status of consul leader node
func GetStatus(l Leader, addr string) (string, error) {
status, err := l.Status(addr, statusLeaderPath)
if err != nil {
return "", fmt.Errorf("Error querying Consul API: %s", err)
}
return status, nil
}
// DefaultLeader struct to append Status
type DefaultLeader struct{}
// Status make GET request on consul api
func (dn *DefaultLeader) Status(addr, path string) (string, error) {
url := fmt.Sprintf("http://%s%s", addr, path)
resp, err := http.Get(url)
if err != nil {
return "", err
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
var target string
if err := json.Unmarshal(body, &target); err != nil {
return "", err
}
return target, nil
}
func isAvailable(addr string) (bool, error) {
status, err := GetStatus(&DefaultLeader{}, addr)
if status != "" {
return true, nil
}
return false, err
}