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Truncate GCE load balancer names to 63 chars

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This commit is contained in:
Brendan Burns 2015-04-30 17:47:34 -07:00
parent 262c34e7db
commit 40549dc083
1 changed files with 21 additions and 3 deletions
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24
pkg/cloudprovider/gce/gce.go
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@ -17,6 +17,7 @@ limitations under the License.
package gce_cloud
import (
"crypto/md5"
"fmt"
"io"
"io/ioutil"
@ -42,6 +43,8 @@ import (
"google.golang.org/cloud/compute/metadata"
)
const LOAD_BALANCER_NAME_MAX_LENGTH = 63
// GCECloud is an implementation of Interface, TCPLoadBalancer and Instances for Google Compute Engine.
type GCECloud struct {
service *compute.Service
@ -266,10 +269,23 @@ func translateAffinityType(affinityType api.AffinityType) GCEAffinityType {
}
}
func normalizeName(name string) string {
// If it's short enough, just leave it.
if len(name) < LOAD_BALANCER_NAME_MAX_LENGTH-6 {
return name
}
// Hash and truncate
hash := md5.Sum([]byte(name))
truncated := name[0 : LOAD_BALANCER_NAME_MAX_LENGTH-6]
shortHash := hash[0:6]
return fmt.Sprintf("%s%s", truncated, string(shortHash))
}
// CreateTCPLoadBalancer is an implementation of TCPLoadBalancer.CreateTCPLoadBalancer.
// TODO(a-robinson): Don't just ignore specified IP addresses. Check if they're
// owned by the project and available to be used, and use them if they are.
func (gce *GCECloud) CreateTCPLoadBalancer(name, region string, externalIP net.IP, ports []int, hosts []string, affinityType api.AffinityType) (string, error) {
func (gce *GCECloud) CreateTCPLoadBalancer(origName, region string, externalIP net.IP, ports []int, hosts []string, affinityType api.AffinityType) (string, error) {
name := normalizeName(origName)
err := gce.makeTargetPool(name, region, hosts, translateAffinityType(affinityType))
if err != nil {
if !isHTTPErrorCode(err, http.StatusConflict) {
@ -315,7 +331,8 @@ func (gce *GCECloud) CreateTCPLoadBalancer(name, region string, externalIP net.I
}
// UpdateTCPLoadBalancer is an implementation of TCPLoadBalancer.UpdateTCPLoadBalancer.
func (gce *GCECloud) UpdateTCPLoadBalancer(name, region string, hosts []string) error {
func (gce *GCECloud) UpdateTCPLoadBalancer(origName, region string, hosts []string) error {
name := normalizeName(origName)
pool, err := gce.service.TargetPools.Get(gce.projectID, region, name).Do()
if err != nil {
return err
@ -360,7 +377,8 @@ func (gce *GCECloud) UpdateTCPLoadBalancer(name, region string, hosts []string)
}
// DeleteTCPLoadBalancer is an implementation of TCPLoadBalancer.DeleteTCPLoadBalancer.
func (gce *GCECloud) DeleteTCPLoadBalancer(name, region string) error {
func (gce *GCECloud) DeleteTCPLoadBalancer(origName, region string) error {
name := normalizeName(origName)
op, err := gce.service.ForwardingRules.Delete(gce.projectID, region, name).Do()
if err != nil && isHTTPErrorCode(err, http.StatusNotFound) {
glog.Infof("Forwarding rule %s already deleted. Continuing to delete target pool.", name)