764cb5a76e
This adds two concepts, where one encompasses the other. Startup timeout Startup timeout is how long to wait for the entire kubelet to get into a functional state. Right now, this only waits for the pod informer cache for the pod controllerto become in-sync with API server, but this could be extended to other informers (like secrets informer). Wait For Startup This changes the behaviour of the virtual kubelet to wait for the pod controller to start before registering the node. It is to avoid the race condition where the node is registered, but we cannot actually do any pod operations.
147 lines
3.9 KiB
Go
147 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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}
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c.ListenPort = DefaultListenPort
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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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