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cmd/cl-operator: Introduce the deployment operator: cl-operator (clus…
…terlink-net#274) The deployment operator creates an operator to deploy ClusterLink. Its main component is the instance_controller, which takes the ClusterLink instance CRD and creates the ClusterLink components. Signed-off-by: Kfir Toledo <[email protected]>
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| FROM alpine:3.14 | ||
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| FROM gcr.io/distroless/static:nonroot | ||
| WORKDIR / | ||
| COPY ./bin/manager . | ||
| USER 65532:65532 | ||
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| ENTRYPOINT ["/manager"] |
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| // Copyright 2023 The ClusterLink 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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| /* | ||
| Copyright 2024. | ||
| 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 main | ||
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| import ( | ||
| "flag" | ||
| "os" | ||
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| // Import all Kubernetes client auth plugins (e.g. Azure, GCP, OIDC, etc.) | ||
| // to ensure that exec-entrypoint and run can make use of them. | ||
| _ "k8s.io/client-go/plugin/pkg/client/auth" | ||
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| "k8s.io/apimachinery/pkg/runtime" | ||
| utilruntime "k8s.io/apimachinery/pkg/util/runtime" | ||
| clientgoscheme "k8s.io/client-go/kubernetes/scheme" | ||
| ctrl "sigs.k8s.io/controller-runtime" | ||
| "sigs.k8s.io/controller-runtime/pkg/healthz" | ||
| "sigs.k8s.io/controller-runtime/pkg/log/zap" | ||
| metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server" | ||
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| clusterlink "github.com/clusterlink-net/clusterlink/pkg/apis/clusterlink.net/v1alpha1" | ||
| "github.com/clusterlink-net/clusterlink/pkg/operator/controller" | ||
| "github.com/sirupsen/logrus" | ||
| ) | ||
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| var ( | ||
| scheme = runtime.NewScheme() | ||
| setupLog = ctrl.Log.WithName("setup") | ||
| ) | ||
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| func init() { | ||
| utilruntime.Must(clientgoscheme.AddToScheme(scheme)) | ||
| utilruntime.Must(clusterlink.AddToScheme(scheme)) | ||
| } | ||
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| func main() { | ||
| var metricsAddr string | ||
| var enableLeaderElection bool | ||
| var probeAddr string | ||
| flag.StringVar(&metricsAddr, "metrics-bind-address", ":8080", "The address the metric endpoint binds to.") | ||
| flag.StringVar(&probeAddr, "health-probe-bind-address", ":8081", "The address the probe endpoint binds to.") | ||
| flag.BoolVar(&enableLeaderElection, "leader-elect", false, "Enable leader election for controller manager. "+ | ||
| "Enabling this will ensure there is only one active controller manager.") | ||
| opts := zap.Options{ | ||
| Development: true, | ||
| } | ||
| opts.BindFlags(flag.CommandLine) | ||
| flag.Parse() | ||
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| ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts))) | ||
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| mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{ | ||
| Scheme: scheme, | ||
| Metrics: metricsserver.Options{BindAddress: metricsAddr}, | ||
| HealthProbeBindAddress: probeAddr, | ||
| LeaderElection: enableLeaderElection, | ||
| LeaderElectionID: "2754cddd.clusterlink.net", | ||
| // LeaderElectionReleaseOnCancel defines if the leader should step down voluntarily | ||
| // when the Manager ends. This requires the binary to immediately end when the | ||
| // Manager is stopped, otherwise, this setting is unsafe. Setting this significantly | ||
| // speeds up voluntary leader transitions as the new leader don't have to wait | ||
| // LeaseDuration time first. | ||
| // | ||
| // In the default scaffold provided, the program ends immediately after | ||
| // the manager stops, so would be fine to enable this option. However, | ||
| // if you are doing or is intended to do any operation such as perform cleanups | ||
| // after the manager stops then its usage might be unsafe. | ||
| // LeaderElectionReleaseOnCancel: true, | ||
| }) | ||
| if err != nil { | ||
| setupLog.Error(err, "unable to start manager") | ||
| os.Exit(1) | ||
| } | ||
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| if err = (&controller.InstanceReconciler{ | ||
| Client: mgr.GetClient(), | ||
| Scheme: mgr.GetScheme(), | ||
| Logger: logrus.WithField("component", "reconciler"), | ||
| InstancesMeta: make(map[string]string), | ||
| }).SetupWithManager(mgr); err != nil { | ||
| setupLog.Error(err, "unable to create controller", "controller", "Operator") | ||
| os.Exit(1) | ||
| } | ||
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| if err := mgr.AddHealthzCheck("healthz", healthz.Ping); err != nil { | ||
| setupLog.Error(err, "unable to set up health check") | ||
| os.Exit(1) | ||
| } | ||
| if err := mgr.AddReadyzCheck("readyz", healthz.Ping); err != nil { | ||
| setupLog.Error(err, "unable to set up ready check") | ||
| os.Exit(1) | ||
| } | ||
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| setupLog.Info("starting manager") | ||
| if err := mgr.Start(ctrl.SetupSignalHandler()); err != nil { | ||
| setupLog.Error(err, "problem running manager") | ||
| os.Exit(1) | ||
| } | ||
| } |
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