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openstack.go
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openstack.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 openstack
import (
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"regexp"
"strings"
"time"
"github.com/rackspace/gophercloud"
"github.com/rackspace/gophercloud/openstack"
"github.com/rackspace/gophercloud/openstack/blockstorage/v1/volumes"
"github.com/rackspace/gophercloud/openstack/compute/v2/extensions/volumeattach"
"github.com/rackspace/gophercloud/openstack/compute/v2/flavors"
"github.com/rackspace/gophercloud/openstack/compute/v2/servers"
"github.com/rackspace/gophercloud/openstack/networking/v2/extensions/layer3/floatingips"
"github.com/rackspace/gophercloud/openstack/networking/v2/extensions/lbaas/members"
"github.com/rackspace/gophercloud/openstack/networking/v2/extensions/lbaas/monitors"
"github.com/rackspace/gophercloud/openstack/networking/v2/extensions/lbaas/pools"
"github.com/rackspace/gophercloud/openstack/networking/v2/extensions/lbaas/vips"
"github.com/rackspace/gophercloud/pagination"
"github.com/scalingdata/gcfg"
"github.com/golang/glog"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/resource"
"k8s.io/kubernetes/pkg/cloudprovider"
)
const ProviderName = "openstack"
// metadataUrl is URL to OpenStack metadata server. It's hadrcoded IPv4
// link-local address as documented in "OpenStack Cloud Administrator Guide",
// chapter Compute - Networking with nova-network.
// http://docs.openstack.org/admin-guide-cloud/compute-networking-nova.html#metadata-service
const metadataUrl = "http://169.254.169.254/openstack/2012-08-10/meta_data.json"
var ErrNotFound = errors.New("Failed to find object")
var ErrMultipleResults = errors.New("Multiple results where only one expected")
var ErrNoAddressFound = errors.New("No address found for host")
var ErrAttrNotFound = errors.New("Expected attribute not found")
const (
MiB = 1024 * 1024
GB = 1000 * 1000 * 1000
)
// encoding.TextUnmarshaler interface for time.Duration
type MyDuration struct {
time.Duration
}
func (d *MyDuration) UnmarshalText(text []byte) error {
res, err := time.ParseDuration(string(text))
if err != nil {
return err
}
d.Duration = res
return nil
}
type LoadBalancerOpts struct {
SubnetId string `gcfg:"subnet-id"` // required
FloatingNetworkId string `gcfg:"floating-network-id"`
LBMethod string `gfcg:"lb-method"`
CreateMonitor bool `gcfg:"create-monitor"`
MonitorDelay MyDuration `gcfg:"monitor-delay"`
MonitorTimeout MyDuration `gcfg:"monitor-timeout"`
MonitorMaxRetries uint `gcfg:"monitor-max-retries"`
}
// OpenStack is an implementation of cloud provider Interface for OpenStack.
type OpenStack struct {
provider *gophercloud.ProviderClient
region string
lbOpts LoadBalancerOpts
// InstanceID of the server where this OpenStack object is instantiated.
localInstanceID string
}
type Config struct {
Global struct {
AuthUrl string `gcfg:"auth-url"`
Username string
UserId string `gcfg:"user-id"`
Password string
ApiKey string `gcfg:"api-key"`
TenantId string `gcfg:"tenant-id"`
TenantName string `gcfg:"tenant-name"`
DomainId string `gcfg:"domain-id"`
DomainName string `gcfg:"domain-name"`
Region string
}
LoadBalancer LoadBalancerOpts
}
func init() {
cloudprovider.RegisterCloudProvider(ProviderName, func(config io.Reader) (cloudprovider.Interface, error) {
cfg, err := readConfig(config)
if err != nil {
return nil, err
}
return newOpenStack(cfg)
})
}
func (cfg Config) toAuthOptions() gophercloud.AuthOptions {
return gophercloud.AuthOptions{
IdentityEndpoint: cfg.Global.AuthUrl,
Username: cfg.Global.Username,
UserID: cfg.Global.UserId,
Password: cfg.Global.Password,
APIKey: cfg.Global.ApiKey,
TenantID: cfg.Global.TenantId,
TenantName: cfg.Global.TenantName,
DomainID: cfg.Global.DomainId,
DomainName: cfg.Global.DomainName,
// Persistent service, so we need to be able to renew tokens.
AllowReauth: true,
}
}
func readConfig(config io.Reader) (Config, error) {
if config == nil {
err := fmt.Errorf("no OpenStack cloud provider config file given")
return Config{}, err
}
var cfg Config
err := gcfg.ReadInto(&cfg, config)
return cfg, err
}
// parseMetadataUUID reads JSON from OpenStack metadata server and parses
// instance ID out of it.
func parseMetadataUUID(jsonData []byte) (string, error) {
// We should receive an object with { 'uuid': '<uuid>' } and couple of other
// properties (which we ignore).
obj := struct{ UUID string }{}
err := json.Unmarshal(jsonData, &obj)
if err != nil {
return "", err
}
uuid := obj.UUID
if uuid == "" {
err = fmt.Errorf("cannot parse OpenStack metadata, got empty uuid")
return "", err
}
return uuid, nil
}
func readInstanceID() (string, error) {
// Try to find instance ID on the local filesystem (created by cloud-init)
const instanceIDFile = "/var/lib/cloud/data/instance-id"
idBytes, err := ioutil.ReadFile(instanceIDFile)
if err == nil {
instanceID := string(idBytes)
instanceID = strings.TrimSpace(instanceID)
glog.V(3).Infof("Got instance id from %s: %s", instanceIDFile, instanceID)
if instanceID != "" {
return instanceID, nil
}
// Fall through with empty instanceID and try metadata server.
}
glog.V(5).Infof("Cannot read %s: '%v', trying metadata server", instanceIDFile, err)
// Try to get JSON from metdata server.
resp, err := http.Get(metadataUrl)
if err != nil {
glog.V(3).Infof("Cannot read %s: %v", metadataUrl, err)
return "", err
}
if resp.StatusCode != 200 {
err = fmt.Errorf("got unexpected status code when reading metadata from %s: %s", metadataUrl, resp.Status)
glog.V(3).Infof("%v", err)
return "", err
}
defer resp.Body.Close()
bodyBytes, err := ioutil.ReadAll(resp.Body)
if err != nil {
glog.V(3).Infof("Cannot get HTTP response body from %s: %v", metadataUrl, err)
return "", err
}
instanceID, err := parseMetadataUUID(bodyBytes)
if err != nil {
glog.V(3).Infof("Cannot parse instance ID from metadata from %s: %v", metadataUrl, err)
return "", err
}
glog.V(3).Infof("Got instance id from %s: %s", metadataUrl, instanceID)
return instanceID, nil
}
func newOpenStack(cfg Config) (*OpenStack, error) {
provider, err := openstack.AuthenticatedClient(cfg.toAuthOptions())
if err != nil {
return nil, err
}
id, err := readInstanceID()
if err != nil {
return nil, err
}
os := OpenStack{
provider: provider,
region: cfg.Global.Region,
lbOpts: cfg.LoadBalancer,
localInstanceID: id,
}
return &os, nil
}
type Instances struct {
compute *gophercloud.ServiceClient
flavor_to_resource map[string]*api.NodeResources // keyed by flavor id
}
// Instances returns an implementation of Instances for OpenStack.
func (os *OpenStack) Instances() (cloudprovider.Instances, bool) {
glog.V(4).Info("openstack.Instances() called")
compute, err := openstack.NewComputeV2(os.provider, gophercloud.EndpointOpts{
Region: os.region,
})
if err != nil {
glog.Warningf("Failed to find compute endpoint: %v", err)
return nil, false
}
pager := flavors.ListDetail(compute, nil)
flavor_to_resource := make(map[string]*api.NodeResources)
err = pager.EachPage(func(page pagination.Page) (bool, error) {
flavorList, err := flavors.ExtractFlavors(page)
if err != nil {
return false, err
}
for _, flavor := range flavorList {
rsrc := api.NodeResources{
Capacity: api.ResourceList{
api.ResourceCPU: *resource.NewQuantity(int64(flavor.VCPUs), resource.DecimalSI),
api.ResourceMemory: *resource.NewQuantity(int64(flavor.RAM)*MiB, resource.BinarySI),
"openstack.org/disk": *resource.NewQuantity(int64(flavor.Disk)*GB, resource.DecimalSI),
"openstack.org/rxTxFactor": *resource.NewMilliQuantity(int64(flavor.RxTxFactor)*1000, resource.DecimalSI),
"openstack.org/swap": *resource.NewQuantity(int64(flavor.Swap)*MiB, resource.BinarySI),
},
}
flavor_to_resource[flavor.ID] = &rsrc
}
return true, nil
})
if err != nil {
glog.Warningf("Failed to find compute flavors: %v", err)
return nil, false
}
glog.V(3).Infof("Found %v compute flavors", len(flavor_to_resource))
glog.V(1).Info("Claiming to support Instances")
return &Instances{compute, flavor_to_resource}, true
}
func (i *Instances) List(name_filter string) ([]string, error) {
glog.V(4).Infof("openstack List(%v) called", name_filter)
opts := servers.ListOpts{
Name: name_filter,
Status: "ACTIVE",
}
pager := servers.List(i.compute, opts)
ret := make([]string, 0)
err := pager.EachPage(func(page pagination.Page) (bool, error) {
sList, err := servers.ExtractServers(page)
if err != nil {
return false, err
}
for _, server := range sList {
ret = append(ret, server.Name)
}
return true, nil
})
if err != nil {
return nil, err
}
glog.V(3).Infof("Found %v instances matching %v: %v",
len(ret), name_filter, ret)
return ret, nil
}
func getServerByName(client *gophercloud.ServiceClient, name string) (*servers.Server, error) {
opts := servers.ListOpts{
Name: fmt.Sprintf("^%s$", regexp.QuoteMeta(name)),
Status: "ACTIVE",
}
pager := servers.List(client, opts)
serverList := make([]servers.Server, 0, 1)
err := pager.EachPage(func(page pagination.Page) (bool, error) {
s, err := servers.ExtractServers(page)
if err != nil {
return false, err
}
serverList = append(serverList, s...)
if len(serverList) > 1 {
return false, ErrMultipleResults
}
return true, nil
})
if err != nil {
return nil, err
}
if len(serverList) == 0 {
return nil, ErrNotFound
} else if len(serverList) > 1 {
return nil, ErrMultipleResults
}
return &serverList[0], nil
}
func findAddrs(netblob interface{}) []string {
// Run-time types for the win :(
ret := []string{}
list, ok := netblob.([]interface{})
if !ok {
return ret
}
for _, item := range list {
props, ok := item.(map[string]interface{})
if !ok {
continue
}
tmp, ok := props["addr"]
if !ok {
continue
}
addr, ok := tmp.(string)
if !ok {
continue
}
ret = append(ret, addr)
}
return ret
}
func getAddressByName(api *gophercloud.ServiceClient, name string) (string, error) {
srv, err := getServerByName(api, name)
if err != nil {
return "", err
}
var s string
if s == "" {
if tmp := findAddrs(srv.Addresses["private"]); len(tmp) >= 1 {
s = tmp[0]
}
}
if s == "" {
if tmp := findAddrs(srv.Addresses["public"]); len(tmp) >= 1 {
s = tmp[0]
}
}
if s == "" {
s = srv.AccessIPv4
}
if s == "" {
s = srv.AccessIPv6
}
if s == "" {
return "", ErrNoAddressFound
}
return s, nil
}
// Implementation of Instances.CurrentNodeName
func (i *Instances) CurrentNodeName(hostname string) (string, error) {
return hostname, nil
}
func (i *Instances) AddSSHKeyToAllInstances(user string, keyData []byte) error {
return errors.New("unimplemented")
}
func (i *Instances) NodeAddresses(name string) ([]api.NodeAddress, error) {
glog.V(4).Infof("NodeAddresses(%v) called", name)
srv, err := getServerByName(i.compute, name)
if err != nil {
return nil, err
}
addrs := []api.NodeAddress{}
for _, addr := range findAddrs(srv.Addresses["private"]) {
addrs = append(addrs, api.NodeAddress{
Type: api.NodeInternalIP,
Address: addr,
})
}
for _, addr := range findAddrs(srv.Addresses["public"]) {
addrs = append(addrs, api.NodeAddress{
Type: api.NodeExternalIP,
Address: addr,
})
}
// AccessIPs are usually duplicates of "public" addresses.
api.AddToNodeAddresses(&addrs,
api.NodeAddress{
Type: api.NodeExternalIP,
Address: srv.AccessIPv6,
},
api.NodeAddress{
Type: api.NodeExternalIP,
Address: srv.AccessIPv4,
},
)
glog.V(4).Infof("NodeAddresses(%v) => %v", name, addrs)
return addrs, nil
}
// ExternalID returns the cloud provider ID of the specified instance (deprecated).
func (i *Instances) ExternalID(name string) (string, error) {
srv, err := getServerByName(i.compute, name)
if err != nil {
return "", err
}
return srv.ID, nil
}
// InstanceID returns the cloud provider ID of the specified instance.
func (i *Instances) InstanceID(name string) (string, error) {
srv, err := getServerByName(i.compute, name)
if err != nil {
return "", err
}
// In the future it is possible to also return an endpoint as:
// <endpoint>/<instanceid>
return "/" + srv.ID, nil
}
func (os *OpenStack) Clusters() (cloudprovider.Clusters, bool) {
return nil, false
}
// ProviderName returns the cloud provider ID.
func (os *OpenStack) ProviderName() string {
return ProviderName
}
// ScrubDNS filters DNS settings for pods.
func (os *OpenStack) ScrubDNS(nameservers, searches []string) (nsOut, srchOut []string) {
return nameservers, searches
}
type LoadBalancer struct {
network *gophercloud.ServiceClient
compute *gophercloud.ServiceClient
opts LoadBalancerOpts
}
func (os *OpenStack) LoadBalancer() (cloudprovider.LoadBalancer, bool) {
glog.V(4).Info("openstack.LoadBalancer() called")
// TODO: Search for and support Rackspace loadbalancer API, and others.
network, err := openstack.NewNetworkV2(os.provider, gophercloud.EndpointOpts{
Region: os.region,
})
if err != nil {
glog.Warningf("Failed to find neutron endpoint: %v", err)
return nil, false
}
compute, err := openstack.NewComputeV2(os.provider, gophercloud.EndpointOpts{
Region: os.region,
})
if err != nil {
glog.Warningf("Failed to find compute endpoint: %v", err)
return nil, false
}
glog.V(1).Info("Claiming to support LoadBalancer")
return &LoadBalancer{network, compute, os.lbOpts}, true
}
func isNotFound(err error) bool {
e, ok := err.(*gophercloud.UnexpectedResponseCodeError)
return ok && e.Actual == http.StatusNotFound
}
func getPoolByName(client *gophercloud.ServiceClient, name string) (*pools.Pool, error) {
opts := pools.ListOpts{
Name: name,
}
pager := pools.List(client, opts)
poolList := make([]pools.Pool, 0, 1)
err := pager.EachPage(func(page pagination.Page) (bool, error) {
p, err := pools.ExtractPools(page)
if err != nil {
return false, err
}
poolList = append(poolList, p...)
if len(poolList) > 1 {
return false, ErrMultipleResults
}
return true, nil
})
if err != nil {
if isNotFound(err) {
return nil, ErrNotFound
}
return nil, err
}
if len(poolList) == 0 {
return nil, ErrNotFound
} else if len(poolList) > 1 {
return nil, ErrMultipleResults
}
return &poolList[0], nil
}
func getVipByName(client *gophercloud.ServiceClient, name string) (*vips.VirtualIP, error) {
opts := vips.ListOpts{
Name: name,
}
pager := vips.List(client, opts)
vipList := make([]vips.VirtualIP, 0, 1)
err := pager.EachPage(func(page pagination.Page) (bool, error) {
v, err := vips.ExtractVIPs(page)
if err != nil {
return false, err
}
vipList = append(vipList, v...)
if len(vipList) > 1 {
return false, ErrMultipleResults
}
return true, nil
})
if err != nil {
if isNotFound(err) {
return nil, ErrNotFound
}
return nil, err
}
if len(vipList) == 0 {
return nil, ErrNotFound
} else if len(vipList) > 1 {
return nil, ErrMultipleResults
}
return &vipList[0], nil
}
func getFloatingIPByPortID(client *gophercloud.ServiceClient, portID string) (*floatingips.FloatingIP, error) {
opts := floatingips.ListOpts{
PortID: portID,
}
pager := floatingips.List(client, opts)
floatingIPList := make([]floatingips.FloatingIP, 0, 1)
err := pager.EachPage(func(page pagination.Page) (bool, error) {
f, err := floatingips.ExtractFloatingIPs(page)
if err != nil {
return false, err
}
floatingIPList = append(floatingIPList, f...)
if len(floatingIPList) > 1 {
return false, ErrMultipleResults
}
return true, nil
})
if err != nil {
if isNotFound(err) {
return nil, ErrNotFound
}
return nil, err
}
if len(floatingIPList) == 0 {
return nil, ErrNotFound
} else if len(floatingIPList) > 1 {
return nil, ErrMultipleResults
}
return &floatingIPList[0], nil
}
func (lb *LoadBalancer) GetLoadBalancer(name, region string) (*api.LoadBalancerStatus, bool, error) {
vip, err := getVipByName(lb.network, name)
if err == ErrNotFound {
return nil, false, nil
}
if vip == nil {
return nil, false, err
}
status := &api.LoadBalancerStatus{}
status.Ingress = []api.LoadBalancerIngress{{IP: vip.Address}}
return status, true, err
}
// TODO: This code currently ignores 'region' and always creates a
// loadbalancer in only the current OpenStack region. We should take
// a list of regions (from config) and query/create loadbalancers in
// each region.
func (lb *LoadBalancer) EnsureLoadBalancer(name, region string, loadBalancerIP net.IP, ports []*api.ServicePort, hosts []string, affinity api.ServiceAffinity) (*api.LoadBalancerStatus, error) {
glog.V(4).Infof("EnsureLoadBalancer(%v, %v, %v, %v, %v, %v)", name, region, loadBalancerIP, ports, hosts, affinity)
if len(ports) > 1 {
return nil, fmt.Errorf("multiple ports are not yet supported in openstack load balancers")
} else if len(ports) == 0 {
return nil, fmt.Errorf("no ports provided to openstack load balancer")
}
// The service controller verified all the protocols match on the ports, just check and use the first one
// TODO: Convert all error messages to use an event recorder
if ports[0].Protocol != api.ProtocolTCP {
return nil, fmt.Errorf("Only TCP LoadBalancer is supported for openstack load balancers")
}
var persistence *vips.SessionPersistence
switch affinity {
case api.ServiceAffinityNone:
persistence = nil
case api.ServiceAffinityClientIP:
persistence = &vips.SessionPersistence{Type: "SOURCE_IP"}
default:
return nil, fmt.Errorf("unsupported load balancer affinity: %v", affinity)
}
glog.V(2).Info("Checking if openstack load balancer already exists: %s", name)
_, exists, err := lb.GetLoadBalancer(name, region)
if err != nil {
return nil, fmt.Errorf("error checking if openstack load balancer already exists: %v", err)
}
// TODO: Implement a more efficient update strategy for common changes than delete & create
// In particular, if we implement hosts update, we can get rid of UpdateHosts
if exists {
err := lb.EnsureLoadBalancerDeleted(name, region)
if err != nil {
return nil, fmt.Errorf("error deleting existing openstack load balancer: %v", err)
}
}
lbmethod := lb.opts.LBMethod
if lbmethod == "" {
lbmethod = pools.LBMethodRoundRobin
}
pool, err := pools.Create(lb.network, pools.CreateOpts{
Name: name,
Protocol: pools.ProtocolTCP,
SubnetID: lb.opts.SubnetId,
LBMethod: lbmethod,
}).Extract()
if err != nil {
return nil, err
}
for _, host := range hosts {
addr, err := getAddressByName(lb.compute, host)
if err != nil {
return nil, err
}
_, err = members.Create(lb.network, members.CreateOpts{
PoolID: pool.ID,
ProtocolPort: ports[0].NodePort, //TODO: need to handle multi-port
Address: addr,
}).Extract()
if err != nil {
pools.Delete(lb.network, pool.ID)
return nil, err
}
}
var mon *monitors.Monitor
if lb.opts.CreateMonitor {
mon, err = monitors.Create(lb.network, monitors.CreateOpts{
Type: monitors.TypeTCP,
Delay: int(lb.opts.MonitorDelay.Duration.Seconds()),
Timeout: int(lb.opts.MonitorTimeout.Duration.Seconds()),
MaxRetries: int(lb.opts.MonitorMaxRetries),
}).Extract()
if err != nil {
pools.Delete(lb.network, pool.ID)
return nil, err
}
_, err = pools.AssociateMonitor(lb.network, pool.ID, mon.ID).Extract()
if err != nil {
monitors.Delete(lb.network, mon.ID)
pools.Delete(lb.network, pool.ID)
return nil, err
}
}
createOpts := vips.CreateOpts{
Name: name,
Description: fmt.Sprintf("Kubernetes external service %s", name),
Protocol: "TCP",
ProtocolPort: ports[0].Port, //TODO: need to handle multi-port
PoolID: pool.ID,
SubnetID: lb.opts.SubnetId,
Persistence: persistence,
}
if loadBalancerIP != nil {
createOpts.Address = loadBalancerIP.String()
}
vip, err := vips.Create(lb.network, createOpts).Extract()
if err != nil {
if mon != nil {
monitors.Delete(lb.network, mon.ID)
}
pools.Delete(lb.network, pool.ID)
return nil, err
}
status := &api.LoadBalancerStatus{}
status.Ingress = []api.LoadBalancerIngress{{IP: vip.Address}}
if lb.opts.FloatingNetworkId != "" {
floatIPOpts := floatingips.CreateOpts{
FloatingNetworkID: lb.opts.FloatingNetworkId,
PortID: vip.PortID,
}
floatIP, err := floatingips.Create(lb.network, floatIPOpts).Extract()
if err != nil {
return nil, err
}
status.Ingress = append(status.Ingress, api.LoadBalancerIngress{IP: floatIP.FloatingIP})
}
return status, nil
}
func (lb *LoadBalancer) UpdateLoadBalancer(name, region string, hosts []string) error {
glog.V(4).Infof("UpdateLoadBalancer(%v, %v, %v)", name, region, hosts)
vip, err := getVipByName(lb.network, name)
if err != nil {
return err
}
// Set of member (addresses) that _should_ exist
addrs := map[string]bool{}
for _, host := range hosts {
addr, err := getAddressByName(lb.compute, host)
if err != nil {
return err
}
addrs[addr] = true
}
// Iterate over members that _do_ exist
pager := members.List(lb.network, members.ListOpts{PoolID: vip.PoolID})
err = pager.EachPage(func(page pagination.Page) (bool, error) {
memList, err := members.ExtractMembers(page)
if err != nil {
return false, err
}
for _, member := range memList {
if _, found := addrs[member.Address]; found {
// Member already exists
delete(addrs, member.Address)
} else {
// Member needs to be deleted
err = members.Delete(lb.network, member.ID).ExtractErr()
if err != nil {
return false, err
}
}
}
return true, nil
})
if err != nil {
return err
}
// Anything left in addrs is a new member that needs to be added
for addr := range addrs {
_, err := members.Create(lb.network, members.CreateOpts{
PoolID: vip.PoolID,
Address: addr,
ProtocolPort: vip.ProtocolPort,
}).Extract()
if err != nil {
return err
}
}
return nil
}
func (lb *LoadBalancer) EnsureLoadBalancerDeleted(name, region string) error {
glog.V(4).Infof("EnsureLoadBalancerDeleted(%v, %v)", name, region)
vip, err := getVipByName(lb.network, name)
if err != nil && err != ErrNotFound {
return err
}
if lb.opts.FloatingNetworkId != "" && vip != nil {
floatingIP, err := getFloatingIPByPortID(lb.network, vip.PortID)
if err != nil && !isNotFound(err) {
return err
}
if floatingIP != nil {
err = floatingips.Delete(lb.network, floatingIP.ID).ExtractErr()
if err != nil && !isNotFound(err) {
return err
}
}
}
// We have to delete the VIP before the pool can be deleted,
// so no point continuing if this fails.
if vip != nil {
err := vips.Delete(lb.network, vip.ID).ExtractErr()
if err != nil && !isNotFound(err) {
return err
}
}
var pool *pools.Pool
if vip != nil {
pool, err = pools.Get(lb.network, vip.PoolID).Extract()
if err != nil && !isNotFound(err) {
return err
}
} else {
// The VIP is gone, but it is conceivable that a Pool
// still exists that we failed to delete on some
// previous occasion. Make a best effort attempt to
// cleanup any pools with the same name as the VIP.
pool, err = getPoolByName(lb.network, name)
if err != nil && err != ErrNotFound {
return err
}
}
if pool != nil {
for _, monId := range pool.MonitorIDs {
_, err = pools.DisassociateMonitor(lb.network, pool.ID, monId).Extract()
if err != nil {
return err
}
err = monitors.Delete(lb.network, monId).ExtractErr()
if err != nil && !isNotFound(err) {
return err
}
}
err = pools.Delete(lb.network, pool.ID).ExtractErr()
if err != nil && !isNotFound(err) {
return err
}
}
return nil
}
func (os *OpenStack) Zones() (cloudprovider.Zones, bool) {
glog.V(1).Info("Claiming to support Zones")
return os, true
}
func (os *OpenStack) GetZone() (cloudprovider.Zone, error) {
glog.V(1).Infof("Current zone is %v", os.region)
return cloudprovider.Zone{Region: os.region}, nil
}
func (os *OpenStack) Routes() (cloudprovider.Routes, bool) {
return nil, false
}
// Attaches given cinder volume to the compute running kubelet
func (os *OpenStack) AttachDisk(diskName string) (string, error) {
disk, err := os.getVolume(diskName)
if err != nil {
return "", err
}
cClient, err := openstack.NewComputeV2(os.provider, gophercloud.EndpointOpts{
Region: os.region,
})
if err != nil || cClient == nil {
glog.Errorf("Unable to initialize nova client for region: %s", os.region)
return "", err
}
if len(disk.Attachments) > 0 && disk.Attachments[0]["server_id"] != nil {
if os.localInstanceID == disk.Attachments[0]["server_id"] {
glog.V(4).Infof("Disk: %q is already attached to compute: %q", diskName, os.localInstanceID)
return disk.ID, nil
} else {
errMsg := fmt.Sprintf("Disk %q is attached to a different compute: %q, should be detached before proceeding", diskName, disk.Attachments[0]["server_id"])
glog.Errorf(errMsg)
return "", errors.New(errMsg)
}
}
// add read only flag here if possible spothanis
_, err = volumeattach.Create(cClient, os.localInstanceID, &volumeattach.CreateOpts{
VolumeID: disk.ID,
}).Extract()
if err != nil {
glog.Errorf("Failed to attach %s volume to %s compute", diskName, os.localInstanceID)
return "", err
}
glog.V(2).Infof("Successfully attached %s volume to %s compute", diskName, os.localInstanceID)
return disk.ID, nil
}
// Detaches given cinder volume from the compute running kubelet
func (os *OpenStack) DetachDisk(partialDiskId string) error {
disk, err := os.getVolume(partialDiskId)
if err != nil {
return err
}
cClient, err := openstack.NewComputeV2(os.provider, gophercloud.EndpointOpts{
Region: os.region,
})
if err != nil || cClient == nil {
glog.Errorf("Unable to initialize nova client for region: %s", os.region)
return err
}
if len(disk.Attachments) > 0 && disk.Attachments[0]["server_id"] != nil && os.localInstanceID == disk.Attachments[0]["server_id"] {
// This is a blocking call and effects kubelet's performance directly.
// We should consider kicking it out into a separate routine, if it is bad.
err = volumeattach.Delete(cClient, os.localInstanceID, disk.ID).ExtractErr()
if err != nil {
glog.Errorf("Failed to delete volume %s from compute %s attached %v", disk.ID, os.localInstanceID, err)
return err
}
glog.V(2).Infof("Successfully detached volume: %s from compute: %s", disk.ID, os.localInstanceID)
} else {
errMsg := fmt.Sprintf("Disk: %s has no attachments or is not attached to compute: %s", disk.Name, os.localInstanceID)
glog.Errorf(errMsg)
return errors.New(errMsg)
}
return nil
}
// Takes a partial/full disk id or diskname
func (os *OpenStack) getVolume(diskName string) (volumes.Volume, error) {
sClient, err := openstack.NewBlockStorageV1(os.provider, gophercloud.EndpointOpts{