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gce.go
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gce.go
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/*
Copyright 2014 The Kubernetes Authors All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package gce
import (
"fmt"
"io"
"net"
"net/http"
"path"
"regexp"
"sort"
"strconv"
"strings"
"time"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/cloudprovider"
utilerrors "k8s.io/kubernetes/pkg/util/errors"
"k8s.io/kubernetes/pkg/util/sets"
"k8s.io/kubernetes/pkg/util/wait"
"github.com/golang/glog"
"github.com/scalingdata/gcfg"
"golang.org/x/oauth2"
"golang.org/x/oauth2/google"
compute "google.golang.org/api/compute/v1"
container "google.golang.org/api/container/v1"
"google.golang.org/api/googleapi"
"google.golang.org/cloud/compute/metadata"
)
const (
ProviderName = "gce"
k8sNodeRouteTag = "k8s-node-route"
// AffinityTypeNone - no session affinity.
gceAffinityTypeNone = "None"
// AffinityTypeClientIP - affinity based on Client IP.
gceAffinityTypeClientIP = "CLIENT_IP"
// AffinityTypeClientIPProto - affinity based on Client IP and port.
gceAffinityTypeClientIPProto = "CLIENT_IP_PROTO"
operationPollInterval = 3 * time.Second
operationPollTimeoutDuration = 30 * time.Minute
)
// GCECloud is an implementation of Interface, TCPLoadBalancer and Instances for Google Compute Engine.
type GCECloud struct {
service *compute.Service
containerService *container.Service
projectID string
zone string
instanceID string
externalID string
networkURL string
}
type Config struct {
Global struct {
TokenURL string `gcfg:"token-url"`
TokenBody string `gcfg:"token-body"`
ProjectID string `gcfg:"project-id"`
NetworkName string `gcfg:"network-name"`
}
}
func init() {
cloudprovider.RegisterCloudProvider(ProviderName, func(config io.Reader) (cloudprovider.Interface, error) { return newGCECloud(config) })
}
func getProjectAndZone() (string, string, error) {
result, err := metadata.Get("instance/zone")
if err != nil {
return "", "", err
}
parts := strings.Split(result, "/")
if len(parts) != 4 {
return "", "", fmt.Errorf("unexpected response: %s", result)
}
zone := parts[3]
projectID, err := metadata.ProjectID()
if err != nil {
return "", "", err
}
return projectID, zone, nil
}
func getInstanceID() (string, error) {
result, err := metadata.Get("instance/hostname")
if err != nil {
return "", err
}
parts := strings.Split(result, ".")
if len(parts) == 0 {
return "", fmt.Errorf("unexpected response: %s", result)
}
return parts[0], nil
}
func getCurrentExternalID() (string, error) {
externalID, err := metadata.Get("instance/id")
if err != nil {
return "", fmt.Errorf("couldn't get external ID: %v", err)
}
return externalID, nil
}
func getNetworkName() (string, error) {
result, err := metadata.Get("instance/network-interfaces/0/network")
if err != nil {
return "", err
}
parts := strings.Split(result, "/")
if len(parts) != 4 {
return "", fmt.Errorf("unexpected response: %s", result)
}
return parts[3], nil
}
// newGCECloud creates a new instance of GCECloud.
func newGCECloud(config io.Reader) (*GCECloud, error) {
projectID, zone, err := getProjectAndZone()
if err != nil {
return nil, err
}
// TODO: if we want to use this on a machine that doesn't have the http://metadata server
// e.g. on a user's machine (not VM) somewhere, we need to have an alternative for
// instance id lookup.
instanceID, err := getInstanceID()
if err != nil {
return nil, err
}
externalID, err := getCurrentExternalID()
if err != nil {
return nil, err
}
networkName, err := getNetworkName()
if err != nil {
return nil, err
}
networkURL := gceNetworkURL(projectID, networkName)
tokenSource := google.ComputeTokenSource("")
if config != nil {
var cfg Config
if err := gcfg.ReadInto(&cfg, config); err != nil {
glog.Errorf("Couldn't read config: %v", err)
return nil, err
}
if cfg.Global.ProjectID != "" {
projectID = cfg.Global.ProjectID
}
if cfg.Global.NetworkName != "" {
if strings.Contains(cfg.Global.NetworkName, "/") {
networkURL = cfg.Global.NetworkName
} else {
networkURL = gceNetworkURL(cfg.Global.ProjectID, cfg.Global.NetworkName)
}
}
if cfg.Global.TokenURL != "" {
tokenSource = newAltTokenSource(cfg.Global.TokenURL, cfg.Global.TokenBody)
}
}
client := oauth2.NewClient(oauth2.NoContext, tokenSource)
svc, err := compute.New(client)
if err != nil {
return nil, err
}
containerSvc, err := container.New(client)
if err != nil {
return nil, err
}
return &GCECloud{
service: svc,
containerService: containerSvc,
projectID: projectID,
zone: zone,
instanceID: instanceID,
externalID: externalID,
networkURL: networkURL,
}, nil
}
func (gce *GCECloud) Clusters() (cloudprovider.Clusters, bool) {
return gce, true
}
// ProviderName returns the cloud provider ID.
func (gce *GCECloud) ProviderName() string {
return ProviderName
}
// Known-useless DNS search path.
var uselessDNSSearchRE = regexp.MustCompile(`^[0-9]+.google.internal.$`)
// ScrubDNS filters DNS settings for pods.
func (gce *GCECloud) ScrubDNS(nameservers, searches []string) (nsOut, srchOut []string) {
// GCE has too many search paths by default. Filter the ones we know are useless.
for _, s := range searches {
if !uselessDNSSearchRE.MatchString(s) {
srchOut = append(srchOut, s)
}
}
return nameservers, srchOut
}
// TCPLoadBalancer returns an implementation of TCPLoadBalancer for Google Compute Engine.
func (gce *GCECloud) TCPLoadBalancer() (cloudprovider.TCPLoadBalancer, bool) {
return gce, true
}
// Instances returns an implementation of Instances for Google Compute Engine.
func (gce *GCECloud) Instances() (cloudprovider.Instances, bool) {
return gce, true
}
// Zones returns an implementation of Zones for Google Compute Engine.
func (gce *GCECloud) Zones() (cloudprovider.Zones, bool) {
return gce, true
}
// Routes returns an implementation of Routes for Google Compute Engine.
func (gce *GCECloud) Routes() (cloudprovider.Routes, bool) {
return gce, true
}
func makeHostURL(projectID, zone, host string) string {
host = canonicalizeInstanceName(host)
return fmt.Sprintf("https://www.googleapis.com/compute/v1/projects/%s/zones/%s/instances/%s",
projectID, zone, host)
}
func makeComparableHostPath(zone, host string) string {
host = canonicalizeInstanceName(host)
return fmt.Sprintf("/zones/%s/instances/%s", zone, host)
}
func hostURLToComparablePath(hostURL string) string {
idx := strings.Index(hostURL, "/zones/")
if idx < 0 {
return ""
}
return hostURL[idx:]
}
func (gce *GCECloud) targetPoolURL(name, region string) string {
return fmt.Sprintf("https://www.googleapis.com/compute/v1/projects/%s/regions/%s/targetPools/%s", gce.projectID, region, name)
}
func waitForOp(op *compute.Operation, getOperation func(operationName string) (*compute.Operation, error)) error {
if op == nil {
return fmt.Errorf("operation must not be nil")
}
if opIsDone(op) {
return getErrorFromOp(op)
}
opName := op.Name
return wait.Poll(operationPollInterval, operationPollTimeoutDuration, func() (bool, error) {
pollOp, err := getOperation(opName)
if err != nil {
glog.Warningf("GCE poll operation failed: %v", err)
}
return opIsDone(pollOp), getErrorFromOp(pollOp)
})
}
func opIsDone(op *compute.Operation) bool {
return op != nil && op.Status == "DONE"
}
func getErrorFromOp(op *compute.Operation) error {
if op != nil && op.Error != nil && len(op.Error.Errors) > 0 {
err := &googleapi.Error{
Code: int(op.HttpErrorStatusCode),
Message: op.Error.Errors[0].Message,
}
glog.Errorf("GCE operation failed: %v", err)
return err
}
return nil
}
func (gce *GCECloud) waitForGlobalOp(op *compute.Operation) error {
return waitForOp(op, func(operationName string) (*compute.Operation, error) {
return gce.service.GlobalOperations.Get(gce.projectID, operationName).Do()
})
}
func (gce *GCECloud) waitForRegionOp(op *compute.Operation, region string) error {
return waitForOp(op, func(operationName string) (*compute.Operation, error) {
return gce.service.RegionOperations.Get(gce.projectID, region, operationName).Do()
})
}
func (gce *GCECloud) waitForZoneOp(op *compute.Operation) error {
return waitForOp(op, func(operationName string) (*compute.Operation, error) {
return gce.service.ZoneOperations.Get(gce.projectID, gce.zone, operationName).Do()
})
}
// GetTCPLoadBalancer is an implementation of TCPLoadBalancer.GetTCPLoadBalancer
func (gce *GCECloud) GetTCPLoadBalancer(name, region string) (*api.LoadBalancerStatus, bool, error) {
fwd, err := gce.service.ForwardingRules.Get(gce.projectID, region, name).Do()
if err == nil {
status := &api.LoadBalancerStatus{}
status.Ingress = []api.LoadBalancerIngress{{IP: fwd.IPAddress}}
return status, true, nil
}
if isHTTPErrorCode(err, http.StatusNotFound) {
return nil, false, nil
}
return nil, false, err
}
func isHTTPErrorCode(err error, code int) bool {
apiErr, ok := err.(*googleapi.Error)
return ok && apiErr.Code == code
}
// EnsureTCPLoadBalancer is an implementation of TCPLoadBalancer.EnsureTCPLoadBalancer.
// Our load balancers in GCE consist of four separate GCE resources - a static
// IP address, a firewall rule, a target pool, and a forwarding rule. This
// function has to manage all of them.
// Due to an interesting series of design decisions, this handles both creating
// new load balancers and updating existing load balancers, recognizing when
// each is needed.
func (gce *GCECloud) EnsureTCPLoadBalancer(name, region string, requestedIP net.IP, ports []*api.ServicePort, hosts []string, affinityType api.ServiceAffinity) (*api.LoadBalancerStatus, error) {
if len(hosts) == 0 {
return nil, fmt.Errorf("Cannot EnsureTCPLoadBalancer() with no hosts")
}
// Check if the forwarding rule exists, and if so, what its IP is.
fwdRuleExists, fwdRuleNeedsUpdate, fwdRuleIP, err := gce.forwardingRuleNeedsUpdate(name, region, requestedIP, ports)
if err != nil {
return nil, err
}
// Make sure we know which IP address will be used and have properly reserved
// it as static before moving forward with the rest of our operations.
//
// We use static IP addresses when updating a load balancer to ensure that we
// can replace the load balancer's other components without changing the
// address its service is reachable on. We do it this way rather than always
// keeping the static IP around even though this is more complicated because
// it makes it less likely that we'll run into quota issues. Only 7 static
// IP addresses are allowed per region by default.
//
// We could let an IP be allocated for us when the forwarding rule is created,
// but we need the IP to set up the firewall rule, and we want to keep the
// forwarding rule creation as the last thing that needs to be done in this
// function in order to maintain the invariant that "if the forwarding rule
// exists, the LB has been fully created".
ipAddress := ""
if requestedIP != nil {
// If a specific IP address has been requested, we have to respect the
// user's request and use that IP. If the forwarding rule was already using
// a different IP, it will be harmlessly abandoned because it was only an
// ephemeral IP (or it was a different static IP owned by the user, in which
// case we shouldn't delete it anyway).
if err := gce.projectOwnsStaticIP(name, region, requestedIP.String()); err != nil {
return nil, err
}
ipAddress = requestedIP.String()
} else {
// This will either allocate a new static IP if the forwarding rule didn't
// already have an IP, or it will promote the forwarding rule's IP from
// ephemeral to static.
ipAddress, err = gce.createOrPromoteStaticIP(name, region, fwdRuleIP)
if err != nil {
return nil, err
}
}
// Deal with the firewall next. The reason we do this here rather than last
// is because the forwarding rule is used as the indicator that the load
// balancer is fully created - it's what getTCPLoadBalancer checks for.
firewallExists, firewallNeedsUpdate, err := gce.firewallNeedsUpdate(name, region, ipAddress, ports)
if err != nil {
return nil, err
}
if firewallNeedsUpdate {
// Unlike forwarding rules and target pools, firewalls can be updated
// without needing to be deleted and recreated.
if firewallExists {
if err := gce.updateFirewall(name, region, ipAddress, ports, hosts); err != nil {
return nil, err
}
} else {
if err := gce.createFirewall(name, region, ipAddress, ports, hosts); err != nil {
return nil, err
}
}
}
tpExists, tpNeedsUpdate, err := gce.targetPoolNeedsUpdate(name, region, affinityType)
if err != nil {
return nil, err
}
// Now we get to some slightly more interesting logic.
// First, neither target pools nor forwarding rules can be updated in place -
// they have to be deleted and recreated.
// Second, forwarding rules are layered on top of target pools in that you
// can't delete a target pool that's currently in use by a forwarding rule.
// Thus, we have to tear down the forwarding rule if either it or the target
// pool needs to be updated.
if fwdRuleExists && (fwdRuleNeedsUpdate || tpNeedsUpdate) {
if err := gce.deleteForwardingRule(name, region); err != nil {
return nil, fmt.Errorf("failed to delete existing forwarding rule %s for load balancer update: %v", name, err)
}
}
if tpExists && tpNeedsUpdate {
if err := gce.deleteTargetPool(name, region); err != nil {
return nil, fmt.Errorf("failed to delete existing target pool %s for load balancer update: %v", name, err)
}
}
// Once we've deleted the resources (if necessary), build them back up (or for
// the first time if they're new).
if tpNeedsUpdate {
if err := gce.createTargetPool(name, region, hosts, affinityType); err != nil {
return nil, fmt.Errorf("failed to create target pool %s: %v", name, err)
}
}
if tpNeedsUpdate || fwdRuleNeedsUpdate {
if err := gce.createForwardingRule(name, region, ipAddress, ports); err != nil {
return nil, fmt.Errorf("failed to create forwarding rule %s: %v", name, err)
}
}
// Now that we're done operating on everything, demote the static IP back to
// ephemeral to avoid taking up the user's static IP quota.
if err := gce.deleteStaticIP(name, region); err != nil {
return nil, fmt.Errorf("failed to release static IP %s after finishing update of load balancer resources: %v", err)
}
status := &api.LoadBalancerStatus{}
status.Ingress = []api.LoadBalancerIngress{{IP: ipAddress}}
return status, nil
}
// Passing nil for requested IP is perfectly fine - it just means that no specific
// IP is being requested.
// Returns whether the forwarding rule exists, whether it needs to be updated,
// what its IP address is (if it exists), and any error we encountered.
func (gce *GCECloud) forwardingRuleNeedsUpdate(name, region string, requestedIP net.IP, ports []*api.ServicePort) (exists bool, needsUpdate bool, ipAddress string, err error) {
fwd, err := gce.service.ForwardingRules.Get(gce.projectID, region, name).Do()
if err != nil {
if isHTTPErrorCode(err, http.StatusNotFound) {
return false, true, "", nil
}
return false, false, "", fmt.Errorf("error getting load balancer's forwarding rule: %v", err)
}
if requestedIP != nil && requestedIP.String() != fwd.IPAddress {
return true, true, fwd.IPAddress, nil
}
portRange, err := loadBalancerPortRange(ports)
if err != nil {
return false, false, "", err
}
if portRange != fwd.PortRange {
return true, true, fwd.IPAddress, nil
}
return true, false, fwd.IPAddress, nil
}
func loadBalancerPortRange(ports []*api.ServicePort) (string, error) {
if len(ports) == 0 {
return "", fmt.Errorf("no ports specified for GCE load balancer")
}
minPort := 65536
maxPort := 0
for i := range ports {
if ports[i].Port < minPort {
minPort = ports[i].Port
}
if ports[i].Port > maxPort {
maxPort = ports[i].Port
}
}
return fmt.Sprintf("%d-%d", minPort, maxPort), nil
}
// Doesn't check whether the hosts have changed, since host updating is handled
// separately.
func (gce *GCECloud) targetPoolNeedsUpdate(name, region string, affinityType api.ServiceAffinity) (exists bool, needsUpdate bool, err error) {
tp, err := gce.service.TargetPools.Get(gce.projectID, region, name).Do()
if err != nil {
if isHTTPErrorCode(err, http.StatusNotFound) {
return false, true, nil
}
return false, false, fmt.Errorf("error getting load balancer's target pool: %v", err)
}
if translateAffinityType(affinityType) != tp.SessionAffinity {
return true, true, nil
}
return true, false, nil
}
// translate from what K8s supports to what the cloud provider supports for session affinity.
func translateAffinityType(affinityType api.ServiceAffinity) string {
switch affinityType {
case api.ServiceAffinityClientIP:
return gceAffinityTypeClientIP
case api.ServiceAffinityNone:
return gceAffinityTypeNone
default:
glog.Errorf("Unexpected affinity type: %v", affinityType)
return gceAffinityTypeNone
}
}
func (gce *GCECloud) firewallNeedsUpdate(name, region, ipAddress string, ports []*api.ServicePort) (exists bool, needsUpdate bool, err error) {
fw, err := gce.service.Firewalls.Get(gce.projectID, makeFirewallName(name)).Do()
if err != nil {
if isHTTPErrorCode(err, http.StatusNotFound) {
return false, true, nil
}
return false, false, fmt.Errorf("error getting load balancer's target pool: %v", err)
}
if fw.Description != makeFirewallDescription(ipAddress) {
return true, true, nil
}
if len(fw.Allowed) != 1 || fw.Allowed[0].IPProtocol != "tcp" {
return true, true, nil
}
// Make sure the allowed ports match.
allowedPorts := make([]string, len(ports))
for ix := range ports {
allowedPorts[ix] = strconv.Itoa(ports[ix].Port)
}
if !slicesEqual(allowedPorts, fw.Allowed[0].Ports) {
return true, true, nil
}
return true, false, nil
}
func makeFirewallName(name string) string {
return fmt.Sprintf("k8s-fw-%s", name)
}
func makeFirewallDescription(ipAddress string) string {
return fmt.Sprintf("KubernetesAutoGenerated_OnlyAllowTrafficForDestinationIP_%s", ipAddress)
}
func slicesEqual(x, y []string) bool {
if len(x) != len(y) {
return false
}
sort.Strings(x)
sort.Strings(y)
for i := range x {
if x[i] != y[i] {
return false
}
}
return true
}
func (gce *GCECloud) createForwardingRule(name, region, ipAddress string, ports []*api.ServicePort) error {
portRange, err := loadBalancerPortRange(ports)
if err != nil {
return err
}
req := &compute.ForwardingRule{
Name: name,
IPAddress: ipAddress,
IPProtocol: "TCP",
PortRange: portRange,
Target: gce.targetPoolURL(name, region),
}
op, err := gce.service.ForwardingRules.Insert(gce.projectID, region, req).Do()
if err != nil && !isHTTPErrorCode(err, http.StatusConflict) {
return err
}
if op != nil {
err = gce.waitForRegionOp(op, region)
if err != nil && !isHTTPErrorCode(err, http.StatusConflict) {
return err
}
}
return nil
}
func (gce *GCECloud) createTargetPool(name, region string, hosts []string, affinityType api.ServiceAffinity) error {
var instances []string
for _, host := range hosts {
instances = append(instances, makeHostURL(gce.projectID, gce.zone, host))
}
pool := &compute.TargetPool{
Name: name,
Instances: instances,
SessionAffinity: translateAffinityType(affinityType),
}
op, err := gce.service.TargetPools.Insert(gce.projectID, region, pool).Do()
if err != nil && !isHTTPErrorCode(err, http.StatusConflict) {
return err
}
if op != nil {
err = gce.waitForRegionOp(op, region)
if err != nil && !isHTTPErrorCode(err, http.StatusConflict) {
return err
}
}
return nil
}
func (gce *GCECloud) createFirewall(name, region, ipAddress string, ports []*api.ServicePort, hosts []string) error {
firewall, err := gce.firewallObject(name, region, ipAddress, ports, hosts)
if err != nil {
return err
}
op, err := gce.service.Firewalls.Insert(gce.projectID, firewall).Do()
if err != nil && !isHTTPErrorCode(err, http.StatusConflict) {
return err
}
if op != nil {
err = gce.waitForGlobalOp(op)
if err != nil && !isHTTPErrorCode(err, http.StatusConflict) {
return err
}
}
return nil
}
func (gce *GCECloud) updateFirewall(name, region, ipAddress string, ports []*api.ServicePort, hosts []string) error {
firewall, err := gce.firewallObject(name, region, ipAddress, ports, hosts)
if err != nil {
return err
}
op, err := gce.service.Firewalls.Update(gce.projectID, makeFirewallName(name), firewall).Do()
if err != nil && !isHTTPErrorCode(err, http.StatusConflict) {
return err
}
if op != nil {
err = gce.waitForGlobalOp(op)
if err != nil {
return err
}
}
return nil
}
func (gce *GCECloud) firewallObject(name, region, ipAddress string, ports []*api.ServicePort, hosts []string) (*compute.Firewall, error) {
allowedPorts := make([]string, len(ports))
for ix := range ports {
allowedPorts[ix] = strconv.Itoa(ports[ix].Port)
}
hostTags, err := gce.computeHostTags(hosts)
if err != nil {
return nil, err
}
firewall := &compute.Firewall{
Name: makeFirewallName(name),
Description: makeFirewallDescription(ipAddress),
Network: gce.networkURL,
SourceRanges: []string{"0.0.0.0/0"},
TargetTags: hostTags,
Allowed: []*compute.FirewallAllowed{
{
IPProtocol: "tcp",
Ports: allowedPorts,
},
},
}
return firewall, nil
}
// We grab all tags from all instances being added to the pool.
// * The longest tag that is a prefix of the instance name is used
// * If any instance has a prefix tag, all instances must
// * If no instances have a prefix tag, no tags are used
func (gce *GCECloud) computeHostTags(hosts []string) ([]string, error) {
listCall := gce.service.Instances.List(gce.projectID, gce.zone)
// Add the filter for hosts
listCall = listCall.Filter("name eq (" + strings.Join(hosts, "|") + ")")
// Add the fields we want
listCall = listCall.Fields("items(name,tags)")
res, err := listCall.Do()
if err != nil {
return nil, err
}
tags := sets.NewString()
for _, instance := range res.Items {
longest_tag := ""
for _, tag := range instance.Tags.Items {
if strings.HasPrefix(instance.Name, tag) && len(tag) > len(longest_tag) {
longest_tag = tag
}
}
if len(longest_tag) > 0 {
tags.Insert(longest_tag)
} else if len(tags) > 0 {
return nil, fmt.Errorf("Some, but not all, instances have prefix tags (%s is missing)", instance.Name)
}
}
if len(tags) == 0 {
glog.V(2).Info("No instances had tags, creating rule without target tags")
}
return tags.List(), nil
}
func (gce *GCECloud) projectOwnsStaticIP(name, region string, ipAddress string) error {
addresses, err := gce.service.Addresses.List(gce.projectID, region).Do()
if err != nil {
return fmt.Errorf("failed to list gce IP addresses: %v", err)
}
for _, addr := range addresses.Items {
if addr.Address == ipAddress {
// This project does own the address, so return success.
return nil
}
}
return fmt.Errorf("this gce project doesn't own the IP address: %s", ipAddress)
}
func (gce *GCECloud) createOrPromoteStaticIP(name, region, existingIP string) (ipAddress string, err error) {
// If the address doesn't exist, this will create it.
// If the existingIP exists but is ephemeral, this will promote it to static.
// If the address already exists, this will harmlessly return a StatusConflict
// and we'll grab the IP before returning.
addressObj := &compute.Address{Name: name}
if existingIP != "" {
addressObj.Address = existingIP
}
op, err := gce.service.Addresses.Insert(gce.projectID, region, addressObj).Do()
if err != nil && !isHTTPErrorCode(err, http.StatusConflict) {
return "", fmt.Errorf("error creating gce static IP address: %v", err)
}
if op != nil {
err := gce.waitForRegionOp(op, region)
if err != nil && !isHTTPErrorCode(err, http.StatusConflict) {
return "", fmt.Errorf("error waiting for gce static IP address to be created: %v", err)
}
}
// We have to get the address to know which IP was allocated for us.
address, err := gce.service.Addresses.Get(gce.projectID, region, name).Do()
if err != nil {
return "", fmt.Errorf("error re-getting gce static IP address: %v", err)
}
return address.Address, nil
}
// UpdateTCPLoadBalancer is an implementation of TCPLoadBalancer.UpdateTCPLoadBalancer.
func (gce *GCECloud) UpdateTCPLoadBalancer(name, region string, hosts []string) error {
pool, err := gce.service.TargetPools.Get(gce.projectID, region, name).Do()
if err != nil {
return err
}
existing := sets.NewString()
for _, instance := range pool.Instances {
existing.Insert(hostURLToComparablePath(instance))
}
var toAdd []*compute.InstanceReference
var toRemove []*compute.InstanceReference
for _, host := range hosts {
link := makeComparableHostPath(gce.zone, host)
if !existing.Has(link) {
toAdd = append(toAdd, &compute.InstanceReference{Instance: link})
}
existing.Delete(link)
}
for link := range existing {
toRemove = append(toRemove, &compute.InstanceReference{Instance: link})
}
if len(toAdd) > 0 {
add := &compute.TargetPoolsAddInstanceRequest{Instances: toAdd}
op, err := gce.service.TargetPools.AddInstance(gce.projectID, region, name, add).Do()
if err != nil {
return err
}
if err := gce.waitForRegionOp(op, region); err != nil {
return err
}
}
if len(toRemove) > 0 {
rm := &compute.TargetPoolsRemoveInstanceRequest{Instances: toRemove}
op, err := gce.service.TargetPools.RemoveInstance(gce.projectID, region, name, rm).Do()
if err != nil {
return err
}
if err := gce.waitForRegionOp(op, region); err != nil {
return err
}
}
// Try to verify that the correct number of nodes are now in the target pool.
// We've been bitten by a bug here before (#11327) where all nodes were
// accidentally removed and want to make similar problems easier to notice.
updatedPool, err := gce.service.TargetPools.Get(gce.projectID, region, name).Do()
if err != nil {
return err
}
if len(updatedPool.Instances) != len(hosts) {
glog.Errorf("Unexpected number of instances (%d) in target pool %s after updating (expected %d). Instances in updated pool: %s",
len(updatedPool.Instances), name, len(hosts), strings.Join(updatedPool.Instances, ","))
return fmt.Errorf("Unexpected number of instances (%d) in target pool %s after update (expected %d)", len(updatedPool.Instances), name, len(hosts))
}
return nil
}
// EnsureTCPLoadBalancerDeleted is an implementation of TCPLoadBalancer.EnsureTCPLoadBalancerDeleted.
func (gce *GCECloud) EnsureTCPLoadBalancerDeleted(name, region string) error {
err := utilerrors.AggregateGoroutines(
func() error { return gce.deleteFirewall(name, region) },
// Even though we don't hold on to static IPs for load balancers, it's
// possible that EnsureTCPLoadBalancer left one around in a failed
// creation/update attempt, so make sure we clean it up here just in case.
func() error { return gce.deleteStaticIP(name, region) },
func() error {
// The forwarding rule must be deleted before either the target pool can,
// unfortunately, so we have to do these two serially.
if err := gce.deleteForwardingRule(name, region); err != nil {
return err
}
if err := gce.deleteTargetPool(name, region); err != nil {
return err
}
return nil
},
)
if err != nil {
return utilerrors.Flatten(err)
}
return nil
}
func (gce *GCECloud) deleteForwardingRule(name, region string) error {
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 other resources.", name)
} else if err != nil {
glog.Warningf("Failed to delete forwarding rule %s: got error %s.", name, err.Error())
return err
} else {
if err := gce.waitForRegionOp(op, region); err != nil {
glog.Warningf("Failed waiting for forwarding rule %s to be deleted: got error %s.", name, err.Error())
return err
}
}
return nil
}
func (gce *GCECloud) deleteTargetPool(name, region string) error {
op, err := gce.service.TargetPools.Delete(gce.projectID, region, name).Do()
if err != nil && isHTTPErrorCode(err, http.StatusNotFound) {
glog.Infof("Target pool %s already deleted. Continuing to delete other resources.", name)
} else if err != nil {
glog.Warningf("Failed to delete target pool %s, got error %s.", name, err.Error())
return err
} else {
if err := gce.waitForRegionOp(op, region); err != nil {
glog.Warningf("Failed waiting for target pool %s to be deleted: got error %s.", name, err.Error())
return err
}
}
return nil
}
func (gce *GCECloud) deleteFirewall(name, region string) error {
fwName := makeFirewallName(name)
op, err := gce.service.Firewalls.Delete(gce.projectID, fwName).Do()
if err != nil && isHTTPErrorCode(err, http.StatusNotFound) {
glog.Infof("Firewall %s already deleted. Continuing to delete other resources.", name)
} else if err != nil {
glog.Warningf("Failed to delete firewall %s, got error %v", fwName, err)
return err
} else {
if err := gce.waitForGlobalOp(op); err != nil {
glog.Warningf("Failed waiting for Firewall %s to be deleted. Got error: %v", fwName, err)
return err
}
}
return nil
}
func (gce *GCECloud) deleteStaticIP(name, region string) error {
op, err := gce.service.Addresses.Delete(gce.projectID, region, name).Do()
if err != nil && isHTTPErrorCode(err, http.StatusNotFound) {
glog.Infof("Static IP address %s already deleted. Continuing to delete other resources.", name)
} else if err != nil {
glog.Warningf("Failed to delete static IP address %s, got error %v", name, err)
return err
} else {
if err := gce.waitForRegionOp(op, region); err != nil {
glog.Warningf("Failed waiting for address %s to be deleted, got error: %v", name, err)
return err
}
}
return nil
}
// UrlMap management
// GetUrlMap returns the UrlMap by name.
func (gce *GCECloud) GetUrlMap(name string) (*compute.UrlMap, error) {
return gce.service.UrlMaps.Get(gce.projectID, name).Do()
}
// CreateUrlMap creates an url map, using the given backend service as the default service.
func (gce *GCECloud) CreateUrlMap(backend *compute.BackendService, name string) (*compute.UrlMap, error) {
urlMap := &compute.UrlMap{
Name: name,
DefaultService: backend.SelfLink,
}
op, err := gce.service.UrlMaps.Insert(gce.projectID, urlMap).Do()
if err != nil {
return nil, err
}
if err = gce.waitForGlobalOp(op); err != nil {
return nil, err
}
return gce.GetUrlMap(name)
}
// UpdateUrlMap applies the given UrlMap as an update, and returns the new UrlMap.
func (gce *GCECloud) UpdateUrlMap(urlMap *compute.UrlMap) (*compute.UrlMap, error) {
op, err := gce.service.UrlMaps.Update(gce.projectID, urlMap.Name, urlMap).Do()
if err != nil {
return nil, err
}
if err = gce.waitForGlobalOp(op); err != nil {
return nil, err
}
return gce.service.UrlMaps.Get(gce.projectID, urlMap.Name).Do()
}
// DeleteUrlMap deletes a url map by name.
func (gce *GCECloud) DeleteUrlMap(name string) error {
op, err := gce.service.UrlMaps.Delete(gce.projectID, name).Do()
if err != nil {
if isHTTPErrorCode(err, http.StatusNotFound) {
return nil
}
return err
}
return gce.waitForGlobalOp(op)
}
// ListUrlMaps lists all UrlMaps in the project.
func (gce *GCECloud) ListUrlMaps() (*compute.UrlMapList, error) {
return gce.service.UrlMaps.List(gce.projectID).Do()
}
// TargetHttpProxy management
// GetTargetHttpProxy returns the UrlMap by name.
func (gce *GCECloud) GetTargetHttpProxy(name string) (*compute.TargetHttpProxy, error) {
return gce.service.TargetHttpProxies.Get(gce.projectID, name).Do()
}
// CreateTargetHttpProxy creates and returns a TargetHttpProxy with the given UrlMap.
func (gce *GCECloud) CreateTargetHttpProxy(urlMap *compute.UrlMap, name string) (*compute.TargetHttpProxy, error) {
proxy := &compute.TargetHttpProxy{
Name: name,
UrlMap: urlMap.SelfLink,
}
op, err := gce.service.TargetHttpProxies.Insert(gce.projectID, proxy).Do()
if err != nil {
return nil, err
}
if err = gce.waitForGlobalOp(op); err != nil {
return nil, err
}
return gce.GetTargetHttpProxy(name)
}
// SetUrlMapForTargetHttpProxy sets the given UrlMap for the given TargetHttpProxy.
func (gce *GCECloud) SetUrlMapForTargetHttpProxy(proxy *compute.TargetHttpProxy, urlMap *compute.UrlMap) error {