},
		[]string{"clusterCIDR"},
	)
	cidrSetUsage = metrics.NewGaugeVec(
		&metrics.GaugeOpts{
			Subsystem:      nodeIpamSubsystem,
			Name:           "cidrset_usage_cidrs",
			Help:           "Gauge measuring percentage of allocated CIDRs.",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"clusterCIDR"},
	)
	cidrSetAllocationTriesPerRequest = metrics.NewHistogramVec(
		&metrics.HistogramOpts{
			Subsystem:      nodeIpamSubsystem,

	var percentage int32
	if percentageOfNodesToScore != nil {
		percentage = *percentageOfNodesToScore
	} else {
		percentage = sched.percentageOfNodesToScore
	}

	if percentage == 0 {
		percentage = int32(50) - numAllNodes/125
		if percentage < minFeasibleNodesPercentageToFind {
			percentage = minFeasibleNodesPercentageToFind
		}
	}

limitations under the License.
*/

package metrics

import (
	"fmt"
)

// GetResourceUtilizationRatio takes in a set of metrics, a set of matching requests,
// and a target utilization percentage, and calculates the ratio of
// desired to actual utilization (returning that, the actual utilization, and the raw average value)

	sysCPUAvgIOWaitMD = NewGaugeMD(sysCPUAvgIOWait, "Average CPU IOWait time")
	sysCPULoadMD      = NewGaugeMD(sysCPULoad, "CPU load average 1min")
	sysCPULoadPercMD  = NewGaugeMD(sysCPULoadPerc, "CPU load average 1min (percentage)")
	sysCPUNiceMD      = NewGaugeMD(sysCPUNice, "CPU nice time")
	sysCPUStealMD     = NewGaugeMD(sysCPUSteal, "CPU steal time")
	sysCPUSystemMD    = NewGaugeMD(sysCPUSystem, "CPU system time")

	"istio.io/istio/pkg/env"
	"istio.io/istio/pkg/log"
)

// Define telemetry related features here.
var (
	traceSamplingVar = env.Register(
		"PILOT_TRACE_SAMPLING",
		1.0,
		"Sets the mesh-wide trace sampling percentage. Should be 0.0 - 100.0. Precision to 0.01. "+
			"Default is 1.0.",
	)

	TraceSampling = func() float64 {
		f := traceSamplingVar.Get()
		if f < 0.0 || f > 100.0 {

)

var (
	memTotalMD     = NewGaugeMD(memTotal, "Total memory on the node")
	memUsedMD      = NewGaugeMD(memUsed, "Used memory on the node")
	memUsedPercMD  = NewGaugeMD(memUsedPerc, "Used memory percentage on the node")
	memFreeMD      = NewGaugeMD(memFree, "Free memory on the node")
	memBuffersMD   = NewGaugeMD(memBuffers, "Buffers memory on the node")
	memCacheMD     = NewGaugeMD(memCache, "Cache memory on the node")

	"maxUnavailable": "The maximum number of pods that can be unavailable during the update. Value can be an absolute number (ex: 5) or a percentage of desired pods (ex: 10%). Absolute number is calculated from percentage by rounding down. This can not be 0 if MaxSurge is 0. Defaults to 25%. Example: when this is set to 30%, the old ReplicaSet can be scaled down to 70% of desired pods immediately when the rolling update starts....

			cert:        []byte(`INVALIDCERT`),
			now:         time.Date(2017, time.August, 23, 21, 0, 0, 40, time.UTC),
			expectedErr: "invalid PEM encoded certificate",
		},
	}

	cu := NewCertUtil(50) // Grace period percentage is set to 50
	for id, c := range testCases {
		waitTime, err := cu.GetWaitTime(c.cert, c.now)
		if c.expectedErr != "" {
			if err == nil {
				t.Errorf("%s: no error is returned.", id)
			}

message RollingUpdateDeployment {
  // The maximum number of pods that can be unavailable during the update.
  // Value can be an absolute number (ex: 5) or a percentage of desired pods (ex: 10%).
  // Absolute number is calculated from percentage by rounding down.
  // This can not be 0 if MaxSurge is 0.
  // Defaults to 25%.
  // Example: when this is set to 30%, the old ReplicaSet can be scaled down to 70% of desired pods

	return err == nil && maxSurge > 0
}

// SurgeCount returns 0 if surge is not requested, the expected surge number to allow
// out of numberToSchedule if surge is configured, or an error if the surge percentage
// requested is invalid.
func SurgeCount(ds *apps.DaemonSet, numberToSchedule int) (int, error) {
	if ds.Spec.UpdateStrategy.Type != apps.RollingUpdateDaemonSetStrategyType {
		return 0, nil
	}