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move enable injeciton out of sharedmain
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Scott Nichols
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Oct 6, 2020
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| /* | ||
| Copyright 2020 The Knative 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. | ||
| */ | ||
|
|
||
| package injection | ||
|
|
||
| import ( | ||
| "errors" | ||
| "flag" | ||
| "k8s.io/client-go/rest" | ||
| "k8s.io/client-go/tools/clientcmd" | ||
| "k8s.io/klog" | ||
| "log" | ||
| "os" | ||
| "os/user" | ||
| "path/filepath" | ||
| ) | ||
|
|
||
| // ParseAndGetRestConfigOrDie parses the rest config flags and creates a client or | ||
| // dies by calling log.Fatalf. | ||
| func ParseAndGetRestConfigOrDie() *rest.Config { | ||
| var ( | ||
| serverURL = flag.String("server", "", | ||
| "The address of the Kubernetes API server. Overrides any value in kubeconfig. Only required if out-of-cluster.") | ||
| kubeconfig = flag.String("kubeconfig", "", | ||
| "Path to a kubeconfig. Only required if out-of-cluster.") | ||
| ) | ||
| klog.InitFlags(flag.CommandLine) | ||
| flag.Parse() | ||
|
|
||
| cfg, err := GetRestConfig(*serverURL, *kubeconfig) | ||
| if err != nil { | ||
| log.Fatalf("Error building kubeconfig: %v", err) | ||
| } | ||
|
|
||
| return cfg | ||
| } | ||
|
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| // GetConfig returns a rest.Config to be used for kubernetes client creation. | ||
| // It does so in the following order: | ||
| // 1. Use the passed kubeconfig/serverURL. | ||
| // 2. Fallback to the KUBECONFIG environment variable. | ||
| // 3. Fallback to in-cluster config. | ||
| // 4. Fallback to the ~/.kube/config. | ||
| func GetRestConfig(serverURL, kubeconfig string) (*rest.Config, error) { | ||
| if kubeconfig == "" { | ||
| kubeconfig = os.Getenv("KUBECONFIG") | ||
| } | ||
|
|
||
| // We produce configs a bunch of ways, this gives us a single place | ||
| // to "decorate" them with common useful things (e.g. for debugging) | ||
| decorate := func(cfg *rest.Config) *rest.Config { | ||
| return cfg | ||
| } | ||
|
|
||
| // If we have an explicit indication of where the kubernetes config lives, read that. | ||
| if kubeconfig != "" { | ||
| c, err := clientcmd.BuildConfigFromFlags(serverURL, kubeconfig) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return decorate(c), nil | ||
| } | ||
| // If not, try the in-cluster config. | ||
| if c, err := rest.InClusterConfig(); err == nil { | ||
| return decorate(c), nil | ||
| } | ||
| // If no in-cluster config, try the default location in the user's home directory. | ||
| if usr, err := user.Current(); err == nil { | ||
| if c, err := clientcmd.BuildConfigFromFlags("", filepath.Join(usr.HomeDir, ".kube", "config")); err == nil { | ||
| return decorate(c), nil | ||
| } | ||
| } | ||
|
|
||
| return nil, errors.New("could not create a valid kubeconfig") | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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|
@@ -18,7 +18,6 @@ package injection | |
|
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| import ( | ||
| "context" | ||
|
|
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| "k8s.io/client-go/rest" | ||
| ) | ||
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| /* | ||
| Copyright 2019 The Knative 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. | ||
| */ | ||
|
|
||
| package injection | ||
|
|
||
| import ( | ||
| "context" | ||
| "go.uber.org/zap" | ||
| "knative.dev/pkg/controller" | ||
| "knative.dev/pkg/logging" | ||
| "knative.dev/pkg/signals" | ||
|
|
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| "k8s.io/client-go/rest" | ||
| ) | ||
|
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| // EnableInjectionOrDie enables Knative Injection and starts the informers. | ||
| // Both Context and Config are optional. Returns context with rest config set | ||
| // and a function to start the informers after watches have been set up. | ||
| func EnableInjectionOrDie(ctx context.Context, cfg *rest.Config) (context.Context, func()) { | ||
| if ctx == nil { | ||
| ctx = signals.NewContext() | ||
| } | ||
| if cfg == nil { | ||
| cfg = ParseAndGetRestConfigOrDie() | ||
| } | ||
|
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| // Respect user provided settings, but if omitted customize the default behavior. | ||
| if cfg.QPS == 0 { | ||
| cfg.QPS = rest.DefaultQPS | ||
| } | ||
| if cfg.Burst == 0 { | ||
| cfg.Burst = rest.DefaultBurst | ||
| } | ||
| ctx = WithConfig(ctx, cfg) | ||
|
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| ctx, informers := Default.SetupInformers(ctx, cfg) | ||
|
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| return ctx, func() { | ||
| logging.FromContext(ctx).Info("Starting informers...") | ||
| if err := controller.StartInformers(ctx.Done(), informers...); err != nil { | ||
| logging.FromContext(ctx).Fatalw("Failed to start informers", zap.Error(err)) | ||
| } | ||
| } | ||
| } |
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