core

var (
	LabelMetricSetType = LabelDescriptor{
		Key:         "type",
		Description: "Type of the metrics set (container, pod, namespace, node, cluster)",
	}
	MetricSetTypeSystemContainer = "sys_container"
	MetricSetTypePodContainer    = "pod_container"
	MetricSetTypePod             = "pod"
	MetricSetTypeNamespace       = "ns"
	MetricSetTypeNode            = "node"
	MetricSetTypeCluster         = "cluster"

	LabelPodId = LabelDescriptor{
		Key:         "pod_id",
		Description: "The unique ID of the pod",
	}
	LabelPodName = LabelDescriptor{
		Key:         "pod_name",
		Description: "The name of the pod",
	}
	// Deprecated label
	LabelPodNamespace = LabelDescriptor{
		Key:         "pod_namespace",
		Description: "The namespace of the pod",
	}
	LabelNamespaceName = LabelDescriptor{
		Key:         "namespace_name",
		Description: "The name of the namespace",
	}
	LabelPodNamespaceUID = LabelDescriptor{
		Key:         "namespace_id",
		Description: "The UID of namespace of the pod",
	}
	LabelContainerName = LabelDescriptor{
		Key:         "container_name",
		Description: "User-provided name of the container or full container name for system containers",
	}
	LabelLabels = LabelDescriptor{
		Key:         "labels",
		Description: "Comma-separated list of user-provided labels",
	}
	LabelNodename = LabelDescriptor{
		Key:         "nodename",
		Description: "nodename where the container ran",
	}
	LabelHostname = LabelDescriptor{
		Key:         "hostname",
		Description: "Hostname where the container ran",
	}
	LabelResourceID = LabelDescriptor{
		Key:         "resource_id",
		Description: "Identifier(s) specific to a metric",
	}
	LabelHostID = LabelDescriptor{
		Key:         "host_id",
		Description: "Identifier specific to a host. Set by cloud provider or user",
	}
	LabelContainerBaseImage = LabelDescriptor{
		Key:         "container_base_image",
		Description: "User-defined image name that is run inside the container",
	}
	// The label is populated only for GCM
	LabelCustomMetricName = LabelDescriptor{
		Key:         "custom_metric_name",
		Description: "User-defined name of the exported custom metric",
	}
	LabelGCEResourceID = LabelDescriptor{
		Key:         "compute.googleapis.com/resource_id",
		Description: "Resource id for nodes specific for GCE.",
	}
	LabelGCEResourceType = LabelDescriptor{
		Key:         "compute.googleapis.com/resource_type",
		Description: "Resource types for nodes specific for GCE.",
	}
)

var AdditionalMetrics = []Metric{
	MetricCpuRequest,
	MetricCpuLimit,
	MetricMemoryRequest,
	MetricMemoryLimit}

var AllMetrics = append(append(append(append(StandardMetrics, AdditionalMetrics...), RateMetrics...), LabeledMetrics...),
	NodeAutoscalingMetrics...)

var LabeledMetrics = []Metric{
	MetricFilesystemUsage,
	MetricFilesystemLimit,
	MetricFilesystemAvailable,
}

var MetricCpuLimit = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "cpu/limit",
		Description: "CPU hard limit in millicores.",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsCount,
	},
}

var MetricCpuRequest = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "cpu/request",
		Description: "CPU request (the guaranteed amount of resources) in millicores. This metric is Kubernetes specific.",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsCount,
	},
}

var MetricCpuUsage = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "cpu/usage",
		Description: "Cumulative CPU usage on all cores",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsNanoseconds,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasCpu
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   int64(stat.Cpu.Usage.Total)}
	},
}

var MetricCpuUsageRate = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "cpu/usage_rate",
		Description: "CPU usage on all cores in millicores",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsCount,
	},
}

var MetricFilesystemAvailable = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "filesystem/available",
		Description: "The number of available bytes remaining in a the filesystem",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
		Labels:      metricLabels,
	},
}

var MetricFilesystemLimit = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "filesystem/limit",
		Description: "The total size of filesystem in bytes",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
		Labels:      metricLabels,
	},
	HasLabeledMetric: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasFilesystem
	},
	GetLabeledMetric: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) []LabeledMetric {
		result := make([]LabeledMetric, 0, len(stat.Filesystem))
		for _, fs := range stat.Filesystem {
			result = append(result, LabeledMetric{
				Name: "filesystem/limit",
				Labels: map[string]string{
					LabelResourceID.Key: fs.Device,
				},
				MetricValue: MetricValue{
					ValueType:  ValueInt64,
					MetricType: MetricGauge,
					IntValue:   int64(fs.Limit),
				},
			})
		}
		return result
	},
}

var MetricFilesystemUsage = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "filesystem/usage",
		Description: "Total number of bytes consumed on a filesystem",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
		Labels:      metricLabels,
	},
	HasLabeledMetric: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasFilesystem
	},
	GetLabeledMetric: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) []LabeledMetric {
		result := make([]LabeledMetric, 0, len(stat.Filesystem))
		for _, fs := range stat.Filesystem {
			result = append(result, LabeledMetric{
				Name: "filesystem/usage",
				Labels: map[string]string{
					LabelResourceID.Key: fs.Device,
				},
				MetricValue: MetricValue{
					ValueType:  ValueInt64,
					MetricType: MetricGauge,
					IntValue:   int64(fs.Usage),
				},
			})
		}
		return result
	},
}

var MetricMemoryLimit = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/limit",
		Description: "Memory hard limit in bytes.",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
	},
}

var MetricMemoryMajorPageFaults = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/major_page_faults",
		Description: "Number of major page faults",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsCount,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasMemory
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   int64(stat.Memory.ContainerData.Pgmajfault)}
	},
}

var MetricMemoryMajorPageFaultsRate = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/major_page_faults_rate",
		Description: "Rate of major page faults in counts per second",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}

var MetricMemoryPageFaults = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/page_faults",
		Description: "Number of page faults",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsCount,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasMemory
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   int64(stat.Memory.ContainerData.Pgfault)}
	},
}

var MetricMemoryPageFaultsRate = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/page_faults_rate",
		Description: "Rate of page faults in counts per second",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}

var MetricMemoryRequest = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/request",
		Description: "Memory request (the guaranteed amount of resources) in bytes. This metric is Kubernetes specific.",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
	},
}

var MetricMemoryUsage = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/usage",
		Description: "Total memory usage",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasMemory
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricGauge,
			IntValue:   int64(stat.Memory.Usage)}
	},
}

var MetricMemoryWorkingSet = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/working_set",
		Description: "Total working set usage. Working set is the memory being used and not easily dropped by the kernel",
		Type:        MetricGauge,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasMemory
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricGauge,
			IntValue:   int64(stat.Memory.WorkingSet)}
	},
}

var MetricNetworkRx = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/rx",
		Description: "Cumulative number of bytes received over the network",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasNetwork
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   int64(stat.Network.RxBytes)}
	},
}

var MetricNetworkRxErrors = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/rx_errors",
		Description: "Cumulative number of errors while receiving over the network",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsCount,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasNetwork
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   int64(stat.Network.RxErrors)}
	},
}

var MetricNetworkRxErrorsRate = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/rx_errors_rate",
		Description: "Rate of errors sending over the network in errors per second",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}

var MetricNetworkRxRate = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/rx_rate",
		Description: "Rate of bytes received over the network in bytes per second",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}

var MetricNetworkTx = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/tx",
		Description: "Cumulative number of bytes sent over the network",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsBytes,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasNetwork
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   int64(stat.Network.TxBytes)}
	},
}

var MetricNetworkTxErrors = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/tx_errors",
		Description: "Cumulative number of errors while sending over the network",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsCount,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return spec.HasNetwork
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   int64(stat.Network.TxErrors)}
	},
}

var MetricNetworkTxErrorsRate = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/tx_errors_rate",
		Description: "Rate of errors transmitting over the network in errors per second",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}

var MetricNetworkTxRate = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "network/tx_rate",
		Description: "Rate of bytes transmitted over the network in bytes per second",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}

var MetricNodeCpuReservation = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "cpu/node_reservation",
		Description: "Share of cpu that is reserved on the node",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}

var MetricNodeCpuUtilization = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "cpu/node_utilization",
		Description: "Cpu utilization as a share of node capacity",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}

var MetricNodeMemoryReservation = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/node_reservation",
		Description: "Share of memory that is reserved on the node",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}

var MetricNodeMemoryUtilization = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "memory/node_utilization",
		Description: "Memory utilization as a share of memory capacity",
		Type:        MetricGauge,
		ValueType:   ValueFloat,
		Units:       UnitsCount,
	},
}

var MetricUptime = Metric{
	MetricDescriptor: MetricDescriptor{
		Name:        "uptime",
		Description: "Number of milliseconds since the container was started",
		Type:        MetricCumulative,
		ValueType:   ValueInt64,
		Units:       UnitsMilliseconds,
	},
	HasValue: func(spec *cadvisor.ContainerSpec) bool {
		return !spec.CreationTime.IsZero()
	},
	GetValue: func(spec *cadvisor.ContainerSpec, stat *cadvisor.ContainerStats) MetricValue {
		return MetricValue{
			ValueType:  ValueInt64,
			MetricType: MetricCumulative,
			IntValue:   time.Since(spec.CreationTime).Nanoseconds() / time.Millisecond.Nanoseconds()}
	},
}

var NodeAutoscalingMetrics = []Metric{
	MetricNodeCpuUtilization,
	MetricNodeMemoryUtilization,
	MetricNodeCpuReservation,
	MetricNodeMemoryReservation,
}

var RateMetrics = []Metric{
	MetricCpuUsageRate,
	MetricMemoryPageFaultsRate,
	MetricMemoryMajorPageFaultsRate,
	MetricNetworkRxRate,
	MetricNetworkRxErrorsRate,
	MetricNetworkTxRate,
	MetricNetworkTxErrorsRate}

var RateMetricsMapping = map[string]Metric{
	MetricCpuUsage.MetricDescriptor.Name:              MetricCpuUsageRate,
	MetricMemoryPageFaults.MetricDescriptor.Name:      MetricMemoryPageFaultsRate,
	MetricMemoryMajorPageFaults.MetricDescriptor.Name: MetricMemoryMajorPageFaultsRate,
	MetricNetworkRx.MetricDescriptor.Name:             MetricNetworkRxRate,
	MetricNetworkRxErrors.MetricDescriptor.Name:       MetricNetworkRxErrorsRate,
	MetricNetworkTx.MetricDescriptor.Name:             MetricNetworkTxRate,
	MetricNetworkTxErrors.MetricDescriptor.Name:       MetricNetworkTxErrorsRate}

var StandardMetrics = []Metric{
	MetricUptime,
	MetricCpuUsage,
	MetricMemoryUsage,
	MetricMemoryWorkingSet,
	MetricMemoryPageFaults,
	MetricMemoryMajorPageFaults,
	MetricNetworkRx,
	MetricNetworkRxErrors,
	MetricNetworkTx,
	MetricNetworkTxErrors}