metrics

var (
	// SyncProxyRulesLatency is the latency of one round of kube-proxy syncing proxy
	// rules. (With the iptables proxy, this includes both full and partial syncs.)
	SyncProxyRulesLatency = metrics.NewHistogram(
		&metrics.HistogramOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "sync_proxy_rules_duration_seconds",
			Help:           "SyncProxyRules latency in seconds",
			Buckets:        metrics.ExponentialBuckets(0.001, 2, 15),
			StabilityLevel: metrics.ALPHA,
		},
	)

	// SyncFullProxyRulesLatency is the latency of one round of full rule syncing.
	SyncFullProxyRulesLatency = metrics.NewHistogram(
		&metrics.HistogramOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "sync_full_proxy_rules_duration_seconds",
			Help:           "SyncProxyRules latency in seconds for full resyncs",
			Buckets:        metrics.ExponentialBuckets(0.001, 2, 15),
			StabilityLevel: metrics.ALPHA,
		},
	)

	// SyncPartialProxyRulesLatency is the latency of one round of partial rule syncing.
	SyncPartialProxyRulesLatency = metrics.NewHistogram(
		&metrics.HistogramOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "sync_partial_proxy_rules_duration_seconds",
			Help:           "SyncProxyRules latency in seconds for partial resyncs",
			Buckets:        metrics.ExponentialBuckets(0.001, 2, 15),
			StabilityLevel: metrics.ALPHA,
		},
	)

	// SyncProxyRulesLastTimestamp is the timestamp proxy rules were last
	// successfully synced.
	SyncProxyRulesLastTimestamp = metrics.NewGauge(
		&metrics.GaugeOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "sync_proxy_rules_last_timestamp_seconds",
			Help:           "The last time proxy rules were successfully synced",
			StabilityLevel: metrics.ALPHA,
		},
	)

	// NetworkProgrammingLatency is defined as the time it took to program the network - from the time
	// the service or pod has changed to the time the change was propagated and the proper kube-proxy
	// rules were synced. Exported for each endpoints object that were part of the rules sync.
	// See https://github.com/kubernetes/community/blob/master/sig-scalability/slos/network_programming_latency.md
	// Note that the metrics is partially based on the time exported by the endpoints controller on
	// the master machine. The measurement may be inaccurate if there is a clock drift between the
	// node and master machine.
	NetworkProgrammingLatency = metrics.NewHistogram(
		&metrics.HistogramOpts{
			Subsystem: kubeProxySubsystem,
			Name:      "network_programming_duration_seconds",
			Help:      "In Cluster Network Programming Latency in seconds",
			Buckets: metrics.MergeBuckets(
				metrics.LinearBuckets(0.25, 0.25, 2),
				metrics.LinearBuckets(1, 1, 59),
				metrics.LinearBuckets(60, 5, 12),
				metrics.LinearBuckets(120, 30, 7),
			),
			StabilityLevel: metrics.ALPHA,
		},
	)

	// EndpointChangesPending is the number of pending endpoint changes that
	// have not yet been synced to the proxy.
	EndpointChangesPending = metrics.NewGauge(
		&metrics.GaugeOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "sync_proxy_rules_endpoint_changes_pending",
			Help:           "Pending proxy rules Endpoint changes",
			StabilityLevel: metrics.ALPHA,
		},
	)

	// EndpointChangesTotal is the number of endpoint changes that the proxy
	// has seen.
	EndpointChangesTotal = metrics.NewCounter(
		&metrics.CounterOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "sync_proxy_rules_endpoint_changes_total",
			Help:           "Cumulative proxy rules Endpoint changes",
			StabilityLevel: metrics.ALPHA,
		},
	)

	// ServiceChangesPending is the number of pending service changes that
	// have not yet been synced to the proxy.
	ServiceChangesPending = metrics.NewGauge(
		&metrics.GaugeOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "sync_proxy_rules_service_changes_pending",
			Help:           "Pending proxy rules Service changes",
			StabilityLevel: metrics.ALPHA,
		},
	)

	// ServiceChangesTotal is the number of service changes that the proxy has
	// seen.
	ServiceChangesTotal = metrics.NewCounter(
		&metrics.CounterOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "sync_proxy_rules_service_changes_total",
			Help:           "Cumulative proxy rules Service changes",
			StabilityLevel: metrics.ALPHA,
		},
	)

	// IptablesRestoreFailuresTotal is the number of iptables restore failures that the proxy has
	// seen.
	IptablesRestoreFailuresTotal = metrics.NewCounter(
		&metrics.CounterOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "sync_proxy_rules_iptables_restore_failures_total",
			Help:           "Cumulative proxy iptables restore failures",
			StabilityLevel: metrics.ALPHA,
		},
	)

	// IptablesPartialRestoreFailuresTotal is the number of iptables *partial* restore
	// failures (resulting in a fall back to a full restore) that the proxy has seen.
	IptablesPartialRestoreFailuresTotal = metrics.NewCounter(
		&metrics.CounterOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "sync_proxy_rules_iptables_partial_restore_failures_total",
			Help:           "Cumulative proxy iptables partial restore failures",
			StabilityLevel: metrics.ALPHA,
		},
	)

	// IptablesRulesTotal is the total number of iptables rules that the iptables
	// proxy has installed.
	IptablesRulesTotal = metrics.NewGaugeVec(
		&metrics.GaugeOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "sync_proxy_rules_iptables_total",
			Help:           "Total number of iptables rules owned by kube-proxy",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"table"},
	)

	// IptablesRulesLastSync is the number of iptables rules that the iptables proxy
	// updated in the last sync.
	IptablesRulesLastSync = metrics.NewGaugeVec(
		&metrics.GaugeOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "sync_proxy_rules_iptables_last",
			Help:           "Number of iptables rules written by kube-proxy in last sync",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"table"},
	)

	// ProxyHealthzTotal is the number of returned HTTP Status for each
	// healthz probe.
	ProxyHealthzTotal = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "proxy_healthz_total",
			Help:           "Cumulative proxy healthz HTTP status",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"code"},
	)

	// ProxyLivezTotal is the number of returned HTTP Status for each
	// livez probe.
	ProxyLivezTotal = metrics.NewCounterVec(
		&metrics.CounterOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "proxy_livez_total",
			Help:           "Cumulative proxy livez HTTP status",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"code"},
	)

	// SyncProxyRulesLastQueuedTimestamp is the last time a proxy sync was
	// requested. If this is much larger than
	// kubeproxy_sync_proxy_rules_last_timestamp_seconds, then something is hung.
	SyncProxyRulesLastQueuedTimestamp = metrics.NewGauge(
		&metrics.GaugeOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "sync_proxy_rules_last_queued_timestamp_seconds",
			Help:           "The last time a sync of proxy rules was queued",
			StabilityLevel: metrics.ALPHA,
		},
	)

	// SyncProxyRulesNoLocalEndpointsTotal is the total number of rules that do
	// not have an available endpoint. This can be caused by an internal
	// traffic policy with no available local workload.
	SyncProxyRulesNoLocalEndpointsTotal = metrics.NewGaugeVec(
		&metrics.GaugeOpts{
			Subsystem:      kubeProxySubsystem,
			Name:           "sync_proxy_rules_no_local_endpoints_total",
			Help:           "Number of services with a Local traffic policy and no endpoints",
			StabilityLevel: metrics.ALPHA,
		},
		[]string{"traffic_policy"},
	)
)