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40 changes: 40 additions & 0 deletions
40
staging/src/k8s.io/client-go/plugin/pkg/client/auth/openstack/BUILD
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| package(default_visibility = ["//visibility:public"]) | ||
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| licenses(["notice"]) | ||
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| load( | ||
| "@io_bazel_rules_go//go:def.bzl", | ||
| "go_library", | ||
| "go_test", | ||
| ) | ||
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| go_test( | ||
| name = "go_default_test", | ||
| srcs = ["openstack_test.go"], | ||
| library = ":go_default_library", | ||
| tags = ["automanaged"], | ||
| ) | ||
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| go_library( | ||
| name = "go_default_library", | ||
| srcs = ["openstack.go"], | ||
| tags = ["automanaged"], | ||
| deps = [ | ||
| "//vendor/github.com/golang/glog:go_default_library", | ||
| "//vendor/github.com/gophercloud/gophercloud/openstack:go_default_library", | ||
| "//vendor/k8s.io/client-go/rest:go_default_library", | ||
| ], | ||
| ) | ||
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| filegroup( | ||
| name = "package-srcs", | ||
| srcs = glob(["**"]), | ||
| tags = ["automanaged"], | ||
| visibility = ["//visibility:private"], | ||
| ) | ||
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| filegroup( | ||
| name = "all-srcs", | ||
| srcs = [":package-srcs"], | ||
| tags = ["automanaged"], | ||
| ) |
161 changes: 161 additions & 0 deletions
161
staging/src/k8s.io/client-go/plugin/pkg/client/auth/openstack/openstack.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,161 @@ | ||
| /* | ||
| Copyright 2017 The Kubernetes Authors. | ||
| 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. | ||
| */ | ||
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| package openstack | ||
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| import ( | ||
| "fmt" | ||
| "net/http" | ||
| "sync" | ||
| "time" | ||
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| "github.com/golang/glog" | ||
| "github.com/gophercloud/gophercloud/openstack" | ||
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| restclient "k8s.io/client-go/rest" | ||
| ) | ||
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| func init() { | ||
| if err := restclient.RegisterAuthProviderPlugin("openstack", newOpenstackAuthProvider); err != nil { | ||
| glog.Fatalf("Failed to register openstack auth plugin: %s", err) | ||
| } | ||
| } | ||
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| // DefaultTTLDuration is the time before a token gets expired. | ||
| const DefaultTTLDuration = 10 * time.Minute | ||
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| // openstackAuthProvider is an authprovider for openstack. this provider reads | ||
| // the environment variables to determine the client identity, and generates a | ||
| // token which will be inserted into the request header later. | ||
| type openstackAuthProvider struct { | ||
| ttl time.Duration | ||
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| tokenGetter TokenGetter | ||
| } | ||
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| // TokenGetter returns a bearer token that can be inserted into request. | ||
| type TokenGetter interface { | ||
| Token() (string, error) | ||
| } | ||
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| type tokenGetter struct{} | ||
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| // Token creates a token by authenticate with keystone. | ||
| func (*tokenGetter) Token() (string, error) { | ||
| options, err := openstack.AuthOptionsFromEnv() | ||
| if err != nil { | ||
| return "", fmt.Errorf("failed to read openstack env vars: %s", err) | ||
| } | ||
| client, err := openstack.AuthenticatedClient(options) | ||
| if err != nil { | ||
| return "", fmt.Errorf("authentication failed: %s", err) | ||
| } | ||
| return client.TokenID, nil | ||
| } | ||
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| // cachedGetter caches a token until it gets expired, after the expiration, it will | ||
| // generate another token and cache it. | ||
| type cachedGetter struct { | ||
| mutex sync.Mutex | ||
| tokenGetter TokenGetter | ||
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| token string | ||
| born time.Time | ||
| ttl time.Duration | ||
| } | ||
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| // Token returns the current available token, create a new one if expired. | ||
| func (c *cachedGetter) Token() (string, error) { | ||
| c.mutex.Lock() | ||
| defer c.mutex.Unlock() | ||
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| var err error | ||
| // no token or exceeds the TTL | ||
| if c.token == "" || time.Now().Sub(c.born) > c.ttl { | ||
| c.token, err = c.tokenGetter.Token() | ||
| if err != nil { | ||
| return "", fmt.Errorf("failed to get token: %s", err) | ||
| } | ||
| c.born = time.Now() | ||
| } | ||
| return c.token, nil | ||
| } | ||
|
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| // tokenRoundTripper implements the RoundTripper interface: adding the bearer token | ||
| // into the request header. | ||
| type tokenRoundTripper struct { | ||
| http.RoundTripper | ||
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| tokenGetter TokenGetter | ||
| } | ||
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| // RoundTrip adds the bearer token into the request. | ||
| func (t *tokenRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) { | ||
| // if the authorization header already present, use it. | ||
| if req.Header.Get("Authorization") != "" { | ||
| return t.RoundTripper.RoundTrip(req) | ||
| } | ||
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| token, err := t.tokenGetter.Token() | ||
| if err == nil { | ||
| req.Header.Set("Authorization", "Bearer "+token) | ||
| } else { | ||
| glog.V(4).Infof("failed to get token: %s", err) | ||
| } | ||
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| return t.RoundTripper.RoundTrip(req) | ||
| } | ||
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| // newOpenstackAuthProvider creates an auth provider which works with openstack | ||
| // environment. | ||
| func newOpenstackAuthProvider(clusterAddress string, config map[string]string, persister restclient.AuthProviderConfigPersister) (restclient.AuthProvider, error) { | ||
| var ttlDuration time.Duration | ||
| var err error | ||
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| ttl, found := config["ttl"] | ||
| if !found { | ||
| ttlDuration = DefaultTTLDuration | ||
| // persist to config | ||
| config["ttl"] = ttlDuration.String() | ||
| if err = persister.Persist(config); err != nil { | ||
| return nil, fmt.Errorf("failed to persist config: %s", err) | ||
| } | ||
| } else { | ||
| ttlDuration, err = time.ParseDuration(ttl) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to parse ttl config: %s", err) | ||
| } | ||
| } | ||
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| // TODO: read/persist client configuration(OS_XXX env vars) in config | ||
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| return &openstackAuthProvider{ | ||
| ttl: ttlDuration, | ||
| tokenGetter: &tokenGetter{}, | ||
| }, nil | ||
| } | ||
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| func (oap *openstackAuthProvider) WrapTransport(rt http.RoundTripper) http.RoundTripper { | ||
| return &tokenRoundTripper{ | ||
| RoundTripper: rt, | ||
| tokenGetter: &cachedGetter{ | ||
| tokenGetter: oap.tokenGetter, | ||
| ttl: oap.ttl, | ||
| }, | ||
| } | ||
| } | ||
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| func (oap *openstackAuthProvider) Login() error { return nil } |
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