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openstack.go
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openstack.go
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/*
Copyright 2014 Google Inc. 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 (
"errors"
"fmt"
"io"
"net"
"net/url"
"regexp"
"code.google.com/p/gcfg"
"github.com/rackspace/gophercloud"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/cloudprovider"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
)
var ErrServerNotFound = errors.New("Server not found")
var ErrMultipleServersFound = errors.New("Multiple servers matched query")
var ErrFlavorNotFound = errors.New("Flavor not found")
// OpenStack is an implementation of cloud provider Interface for OpenStack.
type OpenStack struct {
provider string
authOpt gophercloud.AuthOptions
region string
access *gophercloud.Access
}
type Config struct {
Global struct {
AuthUrl string
Username, Password string
ApiKey string
TenantId, TenantName string
Region string
}
}
func init() {
cloudprovider.RegisterCloudProvider("openstack", 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{
Username: cfg.Global.Username,
Password: cfg.Global.Password,
ApiKey: cfg.Global.ApiKey,
TenantId: cfg.Global.TenantId,
TenantName: cfg.Global.TenantName,
// 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
}
func newOpenStack(cfg Config) (*OpenStack, error) {
os := OpenStack{
provider: cfg.Global.AuthUrl,
authOpt: cfg.toAuthOptions(),
region: cfg.Global.Region,
}
access, err := gophercloud.Authenticate(os.provider, os.authOpt)
os.access = access
return &os, err
}
type Instances struct {
servers gophercloud.CloudServersProvider
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) {
servers, err := gophercloud.ServersApi(os.access, gophercloud.ApiCriteria{
Type: "compute",
UrlChoice: gophercloud.PublicURL,
Region: os.region,
})
if err != nil {
return nil, false
}
flavors, err := servers.ListFlavors()
if err != nil {
return nil, false
}
flavor_to_resource := make(map[string]*api.NodeResources, len(flavors))
for _, flavor := range flavors {
rsrc := api.NodeResources{
Capacity: api.ResourceList{
"cpu": util.NewIntOrStringFromInt(flavor.VCpus),
"memory": util.NewIntOrStringFromString(fmt.Sprintf("%dMiB", flavor.Ram)),
"openstack.org/disk": util.NewIntOrStringFromString(fmt.Sprintf("%dGB", flavor.Disk)),
"openstack.org/rxTxFactor": util.NewIntOrStringFromInt(int(flavor.RxTxFactor * 1000)),
"openstack.org/swap": util.NewIntOrStringFromString(fmt.Sprintf("%dMiB", flavor.Swap)),
},
}
flavor_to_resource[flavor.Id] = &rsrc
}
return &Instances{servers, flavor_to_resource}, true
}
func (i *Instances) List(name_filter string) ([]string, error) {
filter := url.Values{}
filter.Set("name", name_filter)
filter.Set("status", "ACTIVE")
servers, err := i.servers.ListServersByFilter(filter)
if err != nil {
return nil, err
}
ret := make([]string, len(servers))
for idx, srv := range servers {
ret[idx] = srv.Name
}
return ret, nil
}
func getServerByName(api gophercloud.CloudServersProvider, name string) (*gophercloud.Server, error) {
filter := url.Values{}
filter.Set("name", fmt.Sprintf("^%s$", regexp.QuoteMeta(name)))
filter.Set("status", "ACTIVE")
servers, err := api.ListServersByFilter(filter)
if err != nil {
return nil, err
}
if len(servers) == 0 {
return nil, ErrServerNotFound
} else if len(servers) > 1 {
return nil, ErrMultipleServersFound
}
return &servers[0], nil
}
func (i *Instances) IPAddress(name string) (net.IP, error) {
srv, err := getServerByName(i.servers, name)
if err != nil {
return nil, err
}
var s string
if len(srv.Addresses.Private) > 0 {
s = srv.Addresses.Private[0].Addr
} else if len(srv.Addresses.Public) > 0 {
s = srv.Addresses.Public[0].Addr
} else if srv.AccessIPv4 != "" {
s = srv.AccessIPv4
} else {
s = srv.AccessIPv6
}
return net.ParseIP(s), nil
}
func (i *Instances) GetNodeResources(name string) (*api.NodeResources, error) {
srv, err := getServerByName(i.servers, name)
if err != nil {
return nil, err
}
rsrc, ok := i.flavor_to_resource[srv.Flavor.Id]
if !ok {
return nil, ErrFlavorNotFound
}
return rsrc, nil
}
func (aws *OpenStack) Clusters() (cloudprovider.Clusters, bool) {
return nil, false
}
func (os *OpenStack) TCPLoadBalancer() (cloudprovider.TCPLoadBalancer, bool) {
return nil, false
}
func (os *OpenStack) Zones() (cloudprovider.Zones, bool) {
return nil, false
}