external-provisioner 源码分析（3）- 组件启动参数分析

var (  master               = flag.String("master", "", "Master URL to build a client config from. Either this or kubeconfig needs to be set if the provisioner is being run out of cluster.")  kubeconfig           = flag.String("kubeconfig", "", "Absolute path to the kubeconfig file. Either this or master needs to be set if the provisioner is being run out of cluster.")  csiEndpoint          = flag.String("csi-address", "/run/csi/socket", "The gRPC endpoint for Target CSI Volume.")  _                    = deprecatedflags.Add("connection-timeout")  volumeNamePrefix     = flag.String("volume-name-prefix", "pvc", "Prefix to apply to the name of a created volume.")  volumeNameUUIDLength = flag.Int("volume-name-uuid-length", -1, "Truncates generated UUID of a created volume to this length. Defaults behavior is to NOT truncate.")  showVersion          = flag.Bool("version", false, "Show version.")  retryIntervalStart   = flag.Duration("retry-interval-start", time.Second, "Initial retry interval of failed provisioning or deletion. It doubles with each failure, up to retry-interval-max.")  retryIntervalMax     = flag.Duration("retry-interval-max", 5*time.Minute, "Maximum retry interval of failed provisioning or deletion.")  workerThreads        = flag.Uint("worker-threads", 100, "Number of provisioner worker threads, in other words nr. of simultaneous CSI calls.")  finalizerThreads     = flag.Uint("cloning-protection-threads", 1, "Number of simultaniously running threads, handling cloning finalizer removal")  operationTimeout     = flag.Duration("timeout", 10*time.Second, "Timeout for waiting for creation or deletion of a volume")  _                    = deprecatedflags.Add("provisioner")
  enableLeaderElection    = flag.Bool("enable-leader-election", false, "Enables leader election. If leader election is enabled, additional RBAC rules are required. Please refer to the Kubernetes CSI documentation for instructions on setting up these RBAC rules.")  leaderElectionType      = flag.String("leader-election-type", "endpoints", "the type of leader election, options are 'endpoints' (default) or 'leases' (strongly recommended). The 'endpoints' option is deprecated in favor of 'leases'.")  leaderElectionNamespace = flag.String("leader-election-namespace", "", "Namespace where the leader election resource lives. Defaults to the pod namespace if not set.")  strictTopology          = flag.Bool("strict-topology", false, "Passes only selected node topology to CreateVolume Request, unlike default behavior of passing aggregated cluster topologies that match with topology keys of the selected node.")  extraCreateMetadata     = flag.Bool("extra-create-metadata", false, "If set, add pv/pvc metadata to plugin create requests as parameters.")
  metricsAddress = flag.String("metrics-address", "", "The TCP network address where the prometheus metrics endpoint will listen (example: `:8080`). The default is empty string, which means metrics endpoint is disabled.")  metricsPath    = flag.String("metrics-path", "/metrics", "The HTTP path where prometheus metrics will be exposed. Default is `/metrics`.")    featureGates        map[string]bool  provisionController *controller.ProvisionController  version             = "unknown"
)
func main() {  var config *rest.Config  var err error
  flag.Var(utilflag.NewMapStringBool(&featureGates), "feature-gates", "A set of key=value pairs that describe feature gates for alpha/experimental features. "+    "Options are:\n"+strings.Join(utilfeature.DefaultFeatureGate.KnownFeatures(), "\n"))
  klog.InitFlags(nil)  flag.CommandLine.AddGoFlagSet(goflag.CommandLine)  flag.Set("logtostderr", "true")  flag.Parse()  ......

    ...    args:        - "--csi-address=$(ADDRESS)"        - "--v=5"        - "--timeout=150s"        - "--retry-interval-start=500ms"        - "--enable-leader-election=true"        - "--leader-election-type=leases"        - "--feature-gates=Topology=true"    env:        - name: ADDRESS            value: unix:///csi/csi-provisioner.sock    imagePullPolicy: "Always"    volumeMounts:    - name: socket-dir      mountPath: /csi  volumes：  - name: socket-dir    emptyDir: {      medium: "Memory"    }  ...