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main.go
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main.go
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package main
import (
"os"
flag "github.com/spf13/pflag"
"github.com/spf13/viper"
"go.uber.org/zap"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/clientcmd"
)
var log *zap.SugaredLogger
var nodes []string
var cfg Config
type nodeLabel struct {
Label string
Value string
}
type daemonSet struct {
Namespace string
Name string
}
type Config struct {
NodeLabels []nodeLabel
DaemonSets []daemonSet
Evict bool
}
func main() {
flag.String("resync", "5", "refresh rate for informer")
flag.String("config", "/davyjones.yaml", "config file path")
flag.Bool("debug", false, "print extra logging information")
flag.Parse()
viper.BindPFlags(flag.CommandLine)
debug := viper.GetBool("debug")
var zapper *zap.Logger
var err error
if debug {
zapper, err = zap.NewDevelopment()
} else {
zapper, err = zap.NewProduction()
}
if err != nil {
panic(err)
}
log = zapper.Sugar()
viper.SetConfigType("yaml")
viper.SetConfigFile(viper.GetString("config"))
err = viper.ReadInConfig()
if err != nil {
log.Fatalw("unable to read configuration file",
"error", err.Error(),
)
}
log.Debugw("read config from file",
"path", viper.GetString("config"),
)
viper.Unmarshal(&cfg)
log.Debugw("config generated",
"config", cfg,
)
kubeconfig := os.Getenv("KUBECONFIG")
config, err := clientcmd.BuildConfigFromFlags("", kubeconfig)
if err != nil {
log.Fatalw("unable to build kubeconfig",
"error", err.Error(),
)
}
clientSet, err := kubernetes.NewForConfig(config)
if err != nil {
log.Fatalw("unable to create kubernetes clientset",
"error", err.Error(),
)
}
watcher := NewWatcher(clientSet, &cfg)
watcher.Run()
}