github.phpd.cn/cilium/cilium@v1.6.12/pkg/k8s/config.go (about)

     1  // Copyright 2017 Authors of Cilium
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // Package k8s abstracts all Kubernetes specific behaviour
    16  package k8s
    17  
    18  import (
    19  	"os"
    20  	"strings"
    21  )
    22  
    23  var (
    24  	// config is the configuration of Kubernetes related settings
    25  	config configuration
    26  )
    27  
    28  type configuration struct {
    29  	// APIServer is the address of the API server
    30  	APIServer string
    31  
    32  	// KubeconfigPath is the local path to the kubeconfig configuration
    33  	// file on the filesystem
    34  	KubeconfigPath string
    35  
    36  	// QPS is the QPS to pass to the kubernetes client configuration.
    37  	QPS float32
    38  
    39  	// Burst is the burst to pass to the kubernetes client configuration.
    40  	Burst int
    41  }
    42  
    43  // GetAPIServer returns the configured API server address
    44  func GetAPIServer() string {
    45  	return config.APIServer
    46  }
    47  
    48  // GetKubeconfigPath returns the configured path to the kubeconfig
    49  // configuration file
    50  func GetKubeconfigPath() string {
    51  	return config.KubeconfigPath
    52  }
    53  
    54  // GetQPS gets the QPS of the K8s configuration.
    55  func GetQPS() float32 {
    56  	return config.QPS
    57  }
    58  
    59  // GetBurst gets the burst limit of the K8s configuration.
    60  func GetBurst() int {
    61  	return config.Burst
    62  }
    63  
    64  // Configure sets the parameters of the Kubernetes package
    65  func Configure(apiServer, kubeconfigPath string, qps float32, burst int) {
    66  	config.APIServer = apiServer
    67  	config.KubeconfigPath = kubeconfigPath
    68  	config.QPS = qps
    69  	config.Burst = burst
    70  
    71  	if IsEnabled() &&
    72  		config.APIServer != "" &&
    73  		!strings.HasPrefix(apiServer, "http") {
    74  		config.APIServer = "http://" + apiServer
    75  	}
    76  }
    77  
    78  // IsEnabled checks if Cilium is being used in tandem with Kubernetes.
    79  func IsEnabled() bool {
    80  	return config.APIServer != "" ||
    81  		config.KubeconfigPath != "" ||
    82  		(os.Getenv("KUBERNETES_SERVICE_HOST") != "" &&
    83  			os.Getenv("KUBERNETES_SERVICE_PORT") != "") ||
    84  		os.Getenv("K8S_NODE_NAME") != ""
    85  }