Update storageos api dependency to 0.3.4

vendor/github.com/storageos/go-api/health.go

@@ -0,0 +1,71 @@
+package storageos
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	"github.com/storageos/go-api/types"
+)
+
+var (
+	// HealthAPIPrefix is a partial path to the HTTP endpoint.
+	HealthAPIPrefix = "health"
+)
+
+// CPHealth returns the health of the control plane server at a given url.
+func (c *Client) CPHealth(ctx context.Context, hostname string) (*types.CPHealthStatus, error) {
+
+	url := fmt.Sprintf("http://%s:%s/v1/%s", hostname, DefaultPort, HealthAPIPrefix)
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	req.Header.Set("User-Agent", userAgent)
+	if c.username != "" && c.secret != "" {
+		req.SetBasicAuth(c.username, c.secret)
+	}
+
+	resp, err := c.HTTPClient.Do(req.WithContext(ctx))
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	var status *types.CPHealthStatus
+	if err := json.NewDecoder(resp.Body).Decode(&status); err != nil {
+		return nil, err
+	}
+
+	return status, nil
+}
+
+// DPHealth returns the health of the data plane server at a given url.
+func (c *Client) DPHealth(ctx context.Context, hostname string) (*types.DPHealthStatus, error) {
+
+	url := fmt.Sprintf("http://%s:%s/v1/%s", hostname, DataplaneHealthPort, HealthAPIPrefix)
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	req.Header.Set("User-Agent", userAgent)
+	if c.username != "" && c.secret != "" {
+		req.SetBasicAuth(c.username, c.secret)
+	}
+
+	resp, err := c.HTTPClient.Do(req.WithContext(ctx))
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	var status *types.DPHealthStatus
+	if err := json.NewDecoder(resp.Body).Decode(&status); err != nil {
+		return nil, err
+	}
+
+	return status, nil
+}