148 lines
3.9 KiB
Go
148 lines
3.9 KiB
Go
// Copyright © 2017 The virtual-kubelet authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package root
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import (
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"os"
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"path/filepath"
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"strconv"
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"time"
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"github.com/mitchellh/go-homedir"
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"github.com/pkg/errors"
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"github.com/virtual-kubelet/virtual-kubelet/trace/opencensus"
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corev1 "k8s.io/api/core/v1"
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)
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// Defaults for root command options
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const (
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DefaultNodeName = "virtual-kubelet"
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DefaultOperatingSystem = "Linux"
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DefaultInformerResyncPeriod = 1 * time.Minute
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DefaultMetricsAddr = ":10255"
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DefaultListenPort = 10250 // TODO(cpuguy83)(VK1.0): Change this to an addr instead of just a port.. we should not be listening on all interfaces.
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DefaultPodSyncWorkers = 10
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DefaultKubeNamespace = corev1.NamespaceAll
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DefaultTaintEffect = string(corev1.TaintEffectNoSchedule)
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DefaultTaintKey = "virtual-kubelet.io/provider"
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)
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// Opts stores all the options for configuring the root virtual-kubelet command.
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// It is used for setting flag values.
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//
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// You can set the default options by creating a new `Opts` struct and passing
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// it into `SetDefaultOpts`
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type Opts struct {
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// Path to the kubeconfig to use to connect to the Kubernetes API server.
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KubeConfigPath string
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// Namespace to watch for pods and other resources
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KubeNamespace string
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// Sets the port to listen for requests from the Kubernetes API server
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ListenPort int32
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// Node name to use when creating a node in Kubernetes
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NodeName string
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// Operating system to run pods for
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OperatingSystem string
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Provider string
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ProviderConfigPath string
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TaintKey string
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TaintEffect string
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DisableTaint bool
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MetricsAddr string
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// Number of workers to use to handle pod notifications
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PodSyncWorkers int
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InformerResyncPeriod time.Duration
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// Use node leases when supported by Kubernetes (instead of node status updates)
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EnableNodeLease bool
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TraceExporters []string
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TraceSampleRate string
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TraceConfig opencensus.TracingExporterOptions
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// Startup Timeout is how long to wait for the kubelet to start
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StartupTimeout time.Duration
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}
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// SetDefaultOpts sets default options for unset values on the passed in option struct.
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// Fields tht are already set will not be modified.
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func SetDefaultOpts(c *Opts) error {
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if c.OperatingSystem == "" {
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c.OperatingSystem = DefaultOperatingSystem
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}
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if c.NodeName == "" {
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c.NodeName = getEnv("DEFAULT_NODE_NAME", DefaultNodeName)
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}
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if c.InformerResyncPeriod == 0 {
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c.InformerResyncPeriod = DefaultInformerResyncPeriod
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}
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if c.MetricsAddr == "" {
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c.MetricsAddr = DefaultMetricsAddr
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}
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if c.PodSyncWorkers == 0 {
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c.PodSyncWorkers = DefaultPodSyncWorkers
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}
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if c.TraceConfig.ServiceName == "" {
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c.TraceConfig.ServiceName = DefaultNodeName
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}
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if c.ListenPort == 0 {
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if kp := os.Getenv("KUBELET_PORT"); kp != "" {
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p, err := strconv.Atoi(kp)
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if err != nil {
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return errors.Wrap(err, "error parsing KUBELET_PORT environment variable")
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}
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c.ListenPort = int32(p)
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} else {
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c.ListenPort = DefaultListenPort
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}
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}
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if c.KubeNamespace == "" {
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c.KubeNamespace = DefaultKubeNamespace
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}
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if c.TaintKey == "" {
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c.TaintKey = DefaultTaintKey
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}
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if c.TaintEffect == "" {
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c.TaintEffect = DefaultTaintEffect
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}
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if c.KubeConfigPath == "" {
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c.KubeConfigPath = os.Getenv("KUBECONFIG")
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if c.KubeConfigPath == "" {
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home, _ := homedir.Dir()
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if home != "" {
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c.KubeConfigPath = filepath.Join(home, ".kube", "config")
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}
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}
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}
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return nil
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}
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