api: add status endpoint

api/status.go

@@ -0,0 +1,32 @@
+package api
+
+// Status is used to query the status-related endpoints.
+type Status struct {
+	client *Client
+}
+
+// Status returns a handle on the status endpoints.
+func (c *Client) Status() *Status {
+	return &Status{client: c}
+}
+
+// Leader is used to query for the current cluster leader.
+func (s *Status) Leader() (string, error) {
+	var resp string
+	_, err := s.client.query("/v1/status/leader", &resp, nil)
+	if err != nil {
+		return "", err
+	}
+	return resp, nil
+}
+
+// Peers is used to query the addresses of the server peers
+// in the cluster.
+func (s *Status) Peers() ([]string, error) {
+	var resp []string
+	_, err := s.client.query("/v1/status/peers", &resp, nil)
+	if err != nil {
+		return nil, err
+	}
+	return resp, nil
+}

api/status_test.go

@@ -0,0 +1,41 @@
+package api
+
+import (
+	"testing"
+
+	"github.com/hashicorp/nomad/testutil"
+)
+
+func TestStatus_Leader(t *testing.T) {
+	c, s := makeClient(t, nil, nil)
+	defer s.Stop()
+	status := c.Status()
+
+	// Query for leader status should return a result
+	out, err := status.Leader()
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if out == "" {
+		t.Fatalf("expected leader, got: %q", out)
+	}
+}
+
+func TestStatus_Leader_NoLeader(t *testing.T) {
+	// Start a server without bootstrap mode. This prevents
+	// the leadership from being acquired.
+	c, s := makeClient(t, nil, func(c *testutil.TestServerConfig) {
+		c.Server.Bootstrap = false
+	})
+	defer s.Stop()
+	status := c.Status()
+
+	// Query for leader status should return nothing.
+	out, err := status.Leader()
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	if out != "" {
+		t.Fatalf("expected no leader, got: %q", out)
+	}
+}