X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/fb88a62276c929dc009d96f8b4f1497ae20d811e..c9aaa4d329b08c8b1c8cfd566c5282ab57e97f05:/sdk/go/arvadosclient/arvadosclient.go

diff --git a/sdk/go/arvadosclient/arvadosclient.go b/sdk/go/arvadosclient/arvadosclient.go
index d90c618f7a..8f902d3a09 100644
--- a/sdk/go/arvadosclient/arvadosclient.go
+++ b/sdk/go/arvadosclient/arvadosclient.go
@@ -146,7 +146,7 @@ func MakeTLSConfig(insecure bool) *tls.Config {
 			data, err := ioutil.ReadFile(file)
 			if err != nil {
 				if !os.IsNotExist(err) {
-					log.Printf("error reading %q: %s", file, err)
+					log.Printf("proceeding without loading cert file %q: %s", file, err)
 				}
 				continue
 			}
@@ -206,6 +206,9 @@ func (c *ArvadosClient) CallRaw(method string, resourceType string, uuid string,
 	if scheme == "" {
 		scheme = "https"
 	}
+	if c.ApiServer == "" {
+		return nil, fmt.Errorf("Arvados client is not configured (target API host is not set). Maybe env var ARVADOS_API_HOST should be set first?")
+	}
 	u := url.URL{
 		Scheme: scheme,
 		Host:   c.ApiServer}
@@ -423,6 +426,24 @@ func (c *ArvadosClient) Discovery(parameter string) (value interface{}, err erro
 	return value, ErrInvalidArgument
 }
 
+// ClusterConfig returns the value of the given key in the current cluster's
+// exported config. If key is an empty string, it'll return the entire config.
+func (c *ArvadosClient) ClusterConfig(key string) (config interface{}, err error) {
+	var clusterConfig interface{}
+	err = c.Call("GET", "config", "", "", nil, &clusterConfig)
+	if err != nil {
+		return nil, err
+	}
+	if key == "" {
+		return clusterConfig, nil
+	}
+	configData, ok := clusterConfig.(map[string]interface{})[key]
+	if !ok {
+		return nil, ErrInvalidArgument
+	}
+	return configData, nil
+}
+
 func (c *ArvadosClient) httpClient() *http.Client {
 	if c.Client != nil {
 		return c.Client