dnsHostNameFromCluster extracts the DNS host name from the cluster's load assignment. There should be exactly one locality, with one endpoint, whose address contains the address and port.
(cluster *v3clusterpb.Cluster)
| 283 | // There should be exactly one locality, with one endpoint, whose address |
| 284 | // contains the address and port. |
| 285 | func dnsHostNameFromCluster(cluster *v3clusterpb.Cluster) (string, error) { |
| 286 | loadAssignment := cluster.GetLoadAssignment() |
| 287 | if loadAssignment == nil { |
| 288 | return "", fmt.Errorf("load_assignment not present for LOGICAL_DNS cluster") |
| 289 | } |
| 290 | if len(loadAssignment.GetEndpoints()) != 1 { |
| 291 | return "", fmt.Errorf("load_assignment for LOGICAL_DNS cluster must have exactly one locality, got: %+v", loadAssignment) |
| 292 | } |
| 293 | endpoints := loadAssignment.GetEndpoints()[0].GetLbEndpoints() |
| 294 | if len(endpoints) != 1 { |
| 295 | return "", fmt.Errorf("locality for LOGICAL_DNS cluster must have exactly one endpoint, got: %+v", endpoints) |
| 296 | } |
| 297 | endpoint := endpoints[0].GetEndpoint() |
| 298 | if endpoint == nil { |
| 299 | return "", fmt.Errorf("endpoint for LOGICAL_DNS cluster not set") |
| 300 | } |
| 301 | socketAddr := endpoint.GetAddress().GetSocketAddress() |
| 302 | if socketAddr == nil { |
| 303 | return "", fmt.Errorf("socket address for endpoint for LOGICAL_DNS cluster not set") |
| 304 | } |
| 305 | if socketAddr.GetResolverName() != "" { |
| 306 | return "", fmt.Errorf("socket address for endpoint for LOGICAL_DNS cluster not set has unexpected custom resolver name: %v", socketAddr.GetResolverName()) |
| 307 | } |
| 308 | host := socketAddr.GetAddress() |
| 309 | if host == "" { |
| 310 | return "", fmt.Errorf("host for endpoint for LOGICAL_DNS cluster not set") |
| 311 | } |
| 312 | port := socketAddr.GetPortValue() |
| 313 | if port == 0 { |
| 314 | return "", fmt.Errorf("port for endpoint for LOGICAL_DNS cluster not set") |
| 315 | } |
| 316 | return net.JoinHostPort(host, strconv.Itoa(int(port))), nil |
| 317 | } |
| 318 | |
| 319 | // securityConfigFromCluster extracts the relevant security configuration from |
| 320 | // the received Cluster resource. |
no test coverage detected