ceph-csi 源码分析（2）- 组件启动参数分析

const (  rbdType      = "rbd"  cephfsType   = "cephfs"  livenessType = "liveness"
  rbdDefaultName      = "rbd.csi.ceph.com"  cephfsDefaultName   = "cephfs.csi.ceph.com"  livenessDefaultName = "liveness.csi.ceph.com"
  pollTime     = 60 // seconds  probeTimeout = 3  // seconds)
var (  conf util.Config)
func init() {  // common flags  flag.StringVar(&conf.Vtype, "type", "", "driver type [rbd|cephfs|liveness]")  flag.StringVar(&conf.Endpoint, "endpoint", "unix://tmp/csi.sock", "CSI endpoint")  flag.StringVar(&conf.DriverName, "drivername", "", "name of the driver")  flag.StringVar(&conf.NodeID, "nodeid", "", "node id")  flag.StringVar(&conf.InstanceID, "instanceid", "", "Unique ID distinguishing this instance of Ceph CSI among other"+    " instances, when sharing Ceph clusters across CSI instances for provisioning")  flag.IntVar(&conf.PidLimit, "pidlimit", 0, "the PID limit to configure through cgroups")  flag.BoolVar(&conf.IsControllerServer, "controllerserver", false, "start cephcsi controller server")  flag.BoolVar(&conf.IsNodeServer, "nodeserver", false, "start cephcsi node server")  flag.StringVar(&conf.DomainLabels, "domainlabels", "", "list of kubernetes node labels, that determines the topology"+    " domain the node belongs to, separated by ','")
  // cephfs related flags  flag.BoolVar(&conf.ForceKernelCephFS, "forcecephkernelclient", false, "enable Ceph Kernel clients on kernel < 4.17 which support quotas")
  // liveness/grpc metrics related flags  flag.IntVar(&conf.MetricsPort, "metricsport", 8080, "TCP port for liveness/grpc metrics requests")  flag.StringVar(&conf.MetricsPath, "metricspath", "/metrics", "path of prometheus endpoint where metrics will be available")  flag.DurationVar(&conf.PollTime, "polltime", time.Second*pollTime, "time interval in seconds between each poll")  flag.DurationVar(&conf.PoolTimeout, "timeout", time.Second*probeTimeout, "probe timeout in seconds")
  flag.BoolVar(&conf.EnableGRPCMetrics, "enablegrpcmetrics", false, "[DEPRECATED] enable grpc metrics")  flag.StringVar(&conf.HistogramOption, "histogramoption", "0.5,2,6",    "[DEPRECATED] Histogram option for grpc metrics, should be comma separated value, ex:= 0.5,2,6 where start=0.5 factor=2, count=6")
  flag.UintVar(&conf.RbdHardMaxCloneDepth, "rbdhardmaxclonedepth", 8, "Hard limit for maximum number of nested volume clones that are taken before a flatten occurs")  flag.UintVar(&conf.RbdSoftMaxCloneDepth, "rbdsoftmaxclonedepth", 4, "Soft limit for maximum number of nested volume clones that are taken before a flatten occurs")  flag.UintVar(&conf.MaxSnapshotsOnImage, "maxsnapshotsonimage", 450, "Maximum number of snapshots allowed on rbd image without flattening")  flag.BoolVar(&conf.SkipForceFlatten, "skipforceflatten", false,    "skip image flattening if kernel support mapping of rbd images which has the deep-flatten feature")
  flag.BoolVar(&conf.Version, "version", false, "Print cephcsi version information")
  klog.InitFlags(nil)  if err := flag.Set("logtostderr", "true"); err != nil {    klog.Exitf("failed to set logtostderr flag: %v", err)  }  flag.Parse()}

          args:            - "--nodeid=$(NODE_ID)"            - "--type=rbd"            - "--controllerserver=true"            - "--endpoint=$(CSI_ENDPOINT)"            - "--v=5"            - "--drivername=rbd.csi.ceph.com"            - "--pidlimit=-1"            - "--rbdhardmaxclonedepth=8"            - "--rbdsoftmaxclonedepth=4"          env:            - name: NODE_ID              valueFrom:                fieldRef:                  fieldPath: spec.nodeName            - name: CSI_ENDPOINT              value: unix:///csi/csi-provisioner.sock

          args:            - "--nodeid=$(NODE_ID)"            - "--type=rbd"            - "--nodeserver=true"            - "--endpoint=$(CSI_ENDPOINT)"            - "--v=5"            - "--drivername=rbd.csi.ceph.com"          env:            - name: NODE_ID              valueFrom:                fieldRef:                  fieldPath: spec.nodeName            - name: CSI_ENDPOINT              value: unix:///csi/csi.sock

          args:            - "--type=liveness"            - "--endpoint=$(CSI_ENDPOINT)"            - "--metricsport=8680"            - "--metricspath=/metrics"            - "--polltime=60s"            - "--timeout=3s"          env:            - name: CSI_ENDPOINT              value: unix:///csi/csi-provisioner.sock

          args:            - "--type=liveness"            - "--endpoint=$(CSI_ENDPOINT)"            - "--metricsport=8680"            - "--metricspath=/metrics"            - "--polltime=60s"            - "--timeout=3s"          env:            - name: CSI_ENDPOINT              value: unix:///csi/csi.sock