forked from vmware/go-vcloud-director
/
lbvirtualserver.go
254 lines (211 loc) · 9.77 KB
/
lbvirtualserver.go
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/*
* Copyright 2019 VMware, Inc. All rights reserved. Licensed under the Apache v2 License.
*/
package govcd
import (
"fmt"
"net/http"
"github.com/jlmorris3827/go-vcloud-director/v2/types/v56"
)
// CreateLbVirtualServer creates a load balancer virtual server based on mandatory fields. It is a
// synchronous operation. It returns created object with all fields (including ID) populated
// or an error.
// Name, Protocol, Port and IpAddress fields must be populated
func (egw *EdgeGateway) CreateLbVirtualServer(lbVirtualServerConfig *types.LbVirtualServer) (*types.LbVirtualServer, error) {
if err := validateCreateLbVirtualServer(lbVirtualServerConfig, egw); err != nil {
return nil, err
}
httpPath, err := egw.buildProxiedEdgeEndpointURL(types.LbVirtualServerPath)
if err != nil {
return nil, fmt.Errorf("could not get Edge Gateway API endpoint: %s", err)
}
// We expect to get http.StatusCreated or if not an error of type types.NSXError
resp, err := egw.client.ExecuteRequestWithCustomError(httpPath, http.MethodPost, types.AnyXMLMime,
"error creating load balancer virtual server: %s", lbVirtualServerConfig, &types.NSXError{})
if err != nil {
return nil, err
}
// Location header should look similar to:
// Location: [/network/edges/edge-3/loadbalancer/config/virtualservers/virtualServer-10]
lbVirtualServerId, err := extractNsxObjectIdFromPath(resp.Header.Get("Location"))
if err != nil {
return nil, err
}
readVirtualServer, err := egw.GetLbVirtualServerById(lbVirtualServerId)
if err != nil {
return nil, fmt.Errorf("unable to retrieve load balancer virtual server with ID (%s) after creation: %s",
lbVirtualServerId, err)
}
return readVirtualServer, nil
}
// getLbVirtualServer is able to find the types.LbVirtualServer type by Name and/or ID.
// If both - Name and ID are specified it performs a lookup by ID and returns an error if the specified name and found
// name do not match.
func (egw *EdgeGateway) getLbVirtualServer(lbVirtualServerConfig *types.LbVirtualServer) (*types.LbVirtualServer, error) {
if err := validateGetLbVirtualServer(lbVirtualServerConfig, egw); err != nil {
return nil, err
}
vs, err := egw.GetLbVirtualServers()
if err != nil {
return nil, err
}
// Search for virtual server by ID or by Name
for _, virtualServer := range vs {
// If ID was specified for lookup - look for the same ID
if lbVirtualServerConfig.ID != "" && virtualServer.ID == lbVirtualServerConfig.ID {
return virtualServer, nil
}
// If Name was specified for lookup - look for the same Name
if lbVirtualServerConfig.Name != "" && virtualServer.Name == lbVirtualServerConfig.Name {
// We found it by name. Let's verify if search ID was specified and it matches the lookup object
if lbVirtualServerConfig.ID != "" && virtualServer.ID != lbVirtualServerConfig.ID {
return nil, fmt.Errorf("load balancer virtual server was found by name (%s), "+
"but its ID (%s) does not match specified ID (%s)",
virtualServer.Name, virtualServer.ID, lbVirtualServerConfig.ID)
}
return virtualServer, nil
}
}
return nil, ErrorEntityNotFound
}
// GetLbVirtualServers is getting all virtual servers without filtering anything
func (egw *EdgeGateway) GetLbVirtualServers() ([]*types.LbVirtualServer, error) {
httpPath, err := egw.buildProxiedEdgeEndpointURL(types.LbVirtualServerPath)
if err != nil {
return nil, fmt.Errorf("could not get Edge Gateway API endpoint: %s", err)
}
// Anonymous struct to unwrap "virtual server response"
lbVirtualServerResponse := &struct {
LBVirtualServers []*types.LbVirtualServer `xml:"virtualServer"`
}{}
// This query returns all virtual servers as the API does not have filtering options
_, err = egw.client.ExecuteRequest(httpPath, http.MethodGet, types.AnyXMLMime,
"unable to read load balancer virtual server: %s", nil, lbVirtualServerResponse)
if err != nil {
return nil, err
}
return lbVirtualServerResponse.LBVirtualServers, nil
}
// GetLbVirtualServerById wraps getLbVirtualServers and needs only an ID for lookup
func (egw *EdgeGateway) GetLbVirtualServerById(id string) (*types.LbVirtualServer, error) {
return egw.getLbVirtualServer(&types.LbVirtualServer{ID: id})
}
// GetLbVirtualServerByName wraps getLbVirtualServers and needs only a Name for lookup
func (egw *EdgeGateway) GetLbVirtualServerByName(name string) (*types.LbVirtualServer, error) {
return egw.getLbVirtualServer(&types.LbVirtualServer{Name: name})
}
// UpdateLbVirtualServer updates types.LbVirtualServer with all fields. At least name or ID must be
// specified. If both - Name and ID are specified it performs a lookup by ID and returns an error if
// the specified name and found name do not match.
// Name, Protocol, Port and IpAddress fields must be populated
func (egw *EdgeGateway) UpdateLbVirtualServer(lbVirtualServerConfig *types.LbVirtualServer) (*types.LbVirtualServer, error) {
err := validateUpdateLbVirtualServer(lbVirtualServerConfig, egw)
if err != nil {
return nil, err
}
lbVirtualServerConfig.ID, err = egw.getLbVirtualServerIdByNameId(lbVirtualServerConfig.Name, lbVirtualServerConfig.ID)
if err != nil {
return nil, fmt.Errorf("cannot update load balancer virtual server: %s", err)
}
httpPath, err := egw.buildProxiedEdgeEndpointURL(types.LbVirtualServerPath + lbVirtualServerConfig.ID)
if err != nil {
return nil, fmt.Errorf("could not get Edge Gateway API endpoint: %s", err)
}
// Result should be 204, if not we expect an error of type types.NSXError
_, err = egw.client.ExecuteRequestWithCustomError(httpPath, http.MethodPut, types.AnyXMLMime,
"error while updating load balancer virtual server : %s", lbVirtualServerConfig, &types.NSXError{})
if err != nil {
return nil, err
}
readVirtualServer, err := egw.GetLbVirtualServerById(lbVirtualServerConfig.ID)
if err != nil {
return nil, fmt.Errorf("unable to retrieve virtual server with ID (%s) after update: %s",
lbVirtualServerConfig.ID, err)
}
return readVirtualServer, nil
}
// DeleteLbVirtualServer is able to delete the types.LbVirtualServer type by Name and/or ID.
// If both - Name and ID are specified it performs a lookup by ID and returns an error if the
// specified name and found name do not match.
func (egw *EdgeGateway) DeleteLbVirtualServer(lbVirtualServerConfig *types.LbVirtualServer) error {
err := validateDeleteLbVirtualServer(lbVirtualServerConfig, egw)
if err != nil {
return err
}
lbVirtualServerConfig.ID, err = egw.getLbVirtualServerIdByNameId(lbVirtualServerConfig.Name, lbVirtualServerConfig.ID)
if err != nil {
return fmt.Errorf("cannot delete load balancer virtual server: %s", err)
}
httpPath, err := egw.buildProxiedEdgeEndpointURL(types.LbVirtualServerPath + lbVirtualServerConfig.ID)
if err != nil {
return fmt.Errorf("could not get Edge Gateway API endpoint: %s", err)
}
_, err = egw.client.ExecuteRequestWithCustomError(httpPath, http.MethodDelete, types.AnyXMLMime,
"unable to delete load balancer virtual server: %s", nil, &types.NSXError{})
if err != nil {
return err
}
return nil
}
// DeleteLbVirtualServerById wraps DeleteLbVirtualServer and requires only ID for deletion
func (egw *EdgeGateway) DeleteLbVirtualServerById(id string) error {
return egw.DeleteLbVirtualServer(&types.LbVirtualServer{ID: id})
}
// DeleteLbVirtualServerByName wraps DeleteLbVirtualServer and requires only Name for deletion
func (egw *EdgeGateway) DeleteLbVirtualServerByName(name string) error {
return egw.DeleteLbVirtualServer(&types.LbVirtualServer{Name: name})
}
func validateCreateLbVirtualServer(lbVirtualServerConfig *types.LbVirtualServer, egw *EdgeGateway) error {
if !egw.HasAdvancedNetworking() {
return fmt.Errorf("only advanced edge gateways support load balancers")
}
if lbVirtualServerConfig.Name == "" {
return fmt.Errorf("load balancer virtual server Name cannot be empty")
}
if lbVirtualServerConfig.IpAddress == "" {
return fmt.Errorf("load balancer virtual server IpAddress cannot be empty")
}
if lbVirtualServerConfig.Protocol == "" {
return fmt.Errorf("load balancer virtual server Protocol cannot be empty")
}
if lbVirtualServerConfig.Port == 0 {
return fmt.Errorf("load balancer virtual server Port cannot be empty")
}
return nil
}
func validateGetLbVirtualServer(lbVirtualServerConfig *types.LbVirtualServer, egw *EdgeGateway) error {
if !egw.HasAdvancedNetworking() {
return fmt.Errorf("only advanced edge gateways support load balancers")
}
if lbVirtualServerConfig.ID == "" && lbVirtualServerConfig.Name == "" {
return fmt.Errorf("to read load balancer virtual server at least one of `ID`, `Name` " +
"fields must be specified")
}
return nil
}
func validateUpdateLbVirtualServer(lbVirtualServerConfig *types.LbVirtualServer, egw *EdgeGateway) error {
// Update and create have the same requirements for now
return validateCreateLbVirtualServer(lbVirtualServerConfig, egw)
}
func validateDeleteLbVirtualServer(lbVirtualServerConfig *types.LbVirtualServer, egw *EdgeGateway) error {
// Read and delete have the same requirements for now
return validateGetLbVirtualServer(lbVirtualServerConfig, egw)
}
// getLbVirtualServerIdByNameId checks if at least name or ID is set and returns the ID.
// If the ID is specified - it passes through the ID. If only name was specified
// it will lookup the object by name and return the ID.
func (egw *EdgeGateway) getLbVirtualServerIdByNameId(name, id string) (string, error) {
if name == "" && id == "" {
return "", fmt.Errorf("at least Name or ID must be specific to find load balancer "+
"virtual server got name (%s) ID (%s)", name, id)
}
if id != "" {
return id, nil
}
// if only name was specified, ID must be found, because only ID can be used in request path
readLbVirtualServer, err := egw.GetLbVirtualServerByName(name)
if err != nil {
return "", fmt.Errorf("unable to find load balancer virtual server by name: %s", err)
}
return readLbVirtualServer.ID, nil
}