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main.go
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main.go
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package main
import (
"context"
"fmt"
"net/http"
"os"
"time"
"github.com/argoproj/pkg/cli"
"github.com/argoproj/pkg/errors"
kubecli "github.com/argoproj/pkg/kube/cli"
"github.com/argoproj/pkg/stats"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
runtimeutil "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/client-go/kubernetes"
// load authentication plugin for obtaining credentials from cloud providers.
_ "k8s.io/client-go/plugin/pkg/client/auth"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
"github.com/argoproj/argo-workflows/v3"
wfclientset "github.com/argoproj/argo-workflows/v3/pkg/client/clientset/versioned"
cmdutil "github.com/argoproj/argo-workflows/v3/util/cmd"
"github.com/argoproj/argo-workflows/v3/util/logs"
pprofutil "github.com/argoproj/argo-workflows/v3/util/pprof"
"github.com/argoproj/argo-workflows/v3/workflow/controller"
"github.com/argoproj/argo-workflows/v3/workflow/metrics"
)
const (
// CLIName is the name of the CLI
CLIName = "workflow-controller"
)
// NewRootCommand returns an new instance of the workflow-controller main entrypoint
func NewRootCommand() *cobra.Command {
var (
clientConfig clientcmd.ClientConfig
configMap string // --configmap
executorImage string // --executor-image
executorImagePullPolicy string // --executor-image-pull-policy
containerRuntimeExecutor string
logLevel string // --loglevel
glogLevel int // --gloglevel
logFormat string // --log-format
workflowWorkers int // --workflow-workers
workflowTTLWorkers int // --workflow-ttl-workers
podCleanupWorkers int // --pod-cleanup-workers
burst int
qps float32
namespaced bool // --namespaced
managedNamespace string // --managed-namespace
)
command := cobra.Command{
Use: CLIName,
Short: "workflow-controller is the controller to operate on workflows",
RunE: func(c *cobra.Command, args []string) error {
defer runtimeutil.HandleCrash(runtimeutil.PanicHandlers...)
cli.SetLogLevel(logLevel)
cmdutil.SetGLogLevel(glogLevel)
cmdutil.SetLogFormatter(logFormat)
stats.RegisterStackDumper()
stats.StartStatsTicker(5 * time.Minute)
pprofutil.Init()
config, err := clientConfig.ClientConfig()
if err != nil {
return err
}
version := argo.GetVersion()
config = restclient.AddUserAgent(config, fmt.Sprintf("argo-workflows/%s argo-controller", version.Version))
config.Burst = burst
config.QPS = qps
logs.AddK8SLogTransportWrapper(config)
metrics.AddMetricsTransportWrapper(config)
namespace, _, err := clientConfig.Namespace()
if err != nil {
return err
}
kubeclientset := kubernetes.NewForConfigOrDie(config)
wfclientset := wfclientset.NewForConfigOrDie(config)
if !namespaced && managedNamespace != "" {
log.Warn("ignoring --managed-namespace because --namespaced is false")
managedNamespace = ""
}
if namespaced && managedNamespace == "" {
managedNamespace = namespace
}
// start a controller on instances of our custom resource
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
wfController, err := controller.NewWorkflowController(ctx, clientConfig, kubeclientset, wfclientset, namespace, managedNamespace, executorImage, executorImagePullPolicy, containerRuntimeExecutor, configMap)
errors.CheckError(err)
go wfController.Run(ctx, workflowWorkers, workflowTTLWorkers, podCleanupWorkers)
http.HandleFunc("/healthz", wfController.Healthz)
go func() {
log.Println(http.ListenAndServe(":6060", nil))
}()
// Wait forever
select {}
},
}
clientConfig = kubecli.AddKubectlFlagsToCmd(&command)
command.AddCommand(cmdutil.NewVersionCmd(CLIName))
command.Flags().StringVar(&configMap, "configmap", "workflow-controller-configmap", "Name of K8s configmap to retrieve workflow controller configuration")
command.Flags().StringVar(&executorImage, "executor-image", "", "Executor image to use (overrides value in configmap)")
command.Flags().StringVar(&executorImagePullPolicy, "executor-image-pull-policy", "", "Executor imagePullPolicy to use (overrides value in configmap)")
command.Flags().StringVar(&containerRuntimeExecutor, "container-runtime-executor", "", "Container runtime executor to use (overrides value in configmap)")
command.Flags().StringVar(&logLevel, "loglevel", "info", "Set the logging level. One of: debug|info|warn|error")
command.Flags().IntVar(&glogLevel, "gloglevel", 0, "Set the glog logging level")
command.Flags().StringVar(&logFormat, "log-format", "text", "The formatter to use for logs. One of: text|json")
command.Flags().IntVar(&workflowWorkers, "workflow-workers", 32, "Number of workflow workers")
command.Flags().IntVar(&workflowTTLWorkers, "workflow-ttl-workers", 4, "Number of workflow TTL workers")
command.Flags().IntVar(&podCleanupWorkers, "pod-cleanup-workers", 4, "Number of pod cleanup workers")
command.Flags().IntVar(&burst, "burst", 30, "Maximum burst for throttle.")
command.Flags().Float32Var(&qps, "qps", 20.0, "Queries per second")
command.Flags().BoolVar(&namespaced, "namespaced", false, "run workflow-controller as namespaced mode")
command.Flags().StringVar(&managedNamespace, "managed-namespace", "", "namespace that workflow-controller watches, default to the installation namespace")
return &command
}
func init() {
cobra.OnInitialize(initConfig)
}
func initConfig() {
log.SetFormatter(&log.TextFormatter{
TimestampFormat: "2006-01-02T15:04:05.000Z",
FullTimestamp: true,
})
}
func main() {
if err := NewRootCommand().Execute(); err != nil {
fmt.Println(err)
os.Exit(1)
}
}