container

package
Version: v0.42.0 Latest Latest
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Published: Oct 11, 2021 License: Apache-2.0 Imports: 8 Imported by: 1,570

Documentation

Overview

Package container defines types for sub-container events and also defines an interface for container operation handlers.

Index

Constants

This section is empty.

Variables

View Source
var AllMetrics = MetricSet{
	CpuUsageMetrics:                struct{}{},
	ProcessSchedulerMetrics:        struct{}{},
	PerCpuUsageMetrics:             struct{}{},
	MemoryUsageMetrics:             struct{}{},
	MemoryNumaMetrics:              struct{}{},
	CpuLoadMetrics:                 struct{}{},
	DiskIOMetrics:                  struct{}{},
	AcceleratorUsageMetrics:        struct{}{},
	DiskUsageMetrics:               struct{}{},
	NetworkUsageMetrics:            struct{}{},
	NetworkTcpUsageMetrics:         struct{}{},
	NetworkAdvancedTcpUsageMetrics: struct{}{},
	NetworkUdpUsageMetrics:         struct{}{},
	ProcessMetrics:                 struct{}{},
	AppMetrics:                     struct{}{},
	HugetlbUsageMetrics:            struct{}{},
	PerfMetrics:                    struct{}{},
	ReferencedMemoryMetrics:        struct{}{},
	CPUTopologyMetrics:             struct{}{},
	ResctrlMetrics:                 struct{}{},
	CPUSetMetrics:                  struct{}{},
	OOMMetrics:                     struct{}{},
}

AllMetrics represents all kinds of metrics that cAdvisor supported.

Functions

func ClearContainerHandlerFactories

func ClearContainerHandlerFactories()

Clear the known factories.

func DebugInfo

func DebugInfo() map[string][]string

func HasFactories

func HasFactories() bool

Returns whether there are any container handler factories registered.

func InitializeFSContext added in v0.34.0

func InitializeFSContext(context *fs.Context) error

func InitializePlugins added in v0.34.0

func InitializePlugins(factory info.MachineInfoFactory, fsInfo fs.FsInfo, includedMetrics MetricSet) []watcher.ContainerWatcher

func RegisterContainerHandlerFactory

func RegisterContainerHandlerFactory(factory ContainerHandlerFactory, watchTypes []watcher.ContainerWatchSource)

Register a ContainerHandlerFactory. These should be registered from least general to most general as they will be asked in order whether they can handle a particular container.

func RegisterPlugin added in v0.34.0

func RegisterPlugin(name string, plugin Plugin) error

Types

type ContainerHandler

type ContainerHandler interface {
	// Returns the ContainerReference
	ContainerReference() (info.ContainerReference, error)

	// Returns container's isolation spec.
	GetSpec() (info.ContainerSpec, error)

	// Returns the current stats values of the container.
	GetStats() (*info.ContainerStats, error)

	// Returns the subcontainers of this container.
	ListContainers(listType ListType) ([]info.ContainerReference, error)

	// Returns the processes inside this container.
	ListProcesses(listType ListType) ([]int, error)

	// Returns absolute cgroup path for the requested resource.
	GetCgroupPath(resource string) (string, error)

	// Returns container labels, if available.
	GetContainerLabels() map[string]string

	// Returns the container's ip address, if available
	GetContainerIPAddress() string

	// Returns whether the container still exists.
	Exists() bool

	// Cleanup frees up any resources being held like fds or go routines, etc.
	Cleanup()

	// Start starts any necessary background goroutines - must be cleaned up in Cleanup().
	// It is expected that most implementations will be a no-op.
	Start()

	// Type of handler
	Type() ContainerType
}

Interface for container operation handlers.

func NewContainerHandler

func NewContainerHandler(name string, watchType watcher.ContainerWatchSource, metadataEnvAllowList []string, inHostNamespace bool) (ContainerHandler, bool, error)

Create a new ContainerHandler for the specified container.

type ContainerHandlerFactory

type ContainerHandlerFactory interface {
	// Create a new ContainerHandler using this factory. CanHandleAndAccept() must have returned true.
	NewContainerHandler(name string, metadataEnvAllowList []string, inHostNamespace bool) (c ContainerHandler, err error)

	// Returns whether this factory can handle and accept the specified container.
	CanHandleAndAccept(name string) (handle bool, accept bool, err error)

	// Name of the factory.
	String() string

	// Returns debugging information. Map of lines per category.
	DebugInfo() map[string][]string
}

type ContainerType added in v0.23.2

type ContainerType int
const (
	ContainerTypeRaw ContainerType = iota
	ContainerTypeDocker
	ContainerTypeCrio
	ContainerTypeContainerd
	ContainerTypeMesos
)

type ListType

type ListType int

ListType describes whether listing should be just for a specific container or performed recursively.

const (
	ListSelf ListType = iota
	ListRecursive
)

type MetricKind added in v0.22.0

type MetricKind string

MetricKind represents the kind of metrics that cAdvisor exposes.

const (
	CpuUsageMetrics                MetricKind = "cpu"
	ProcessSchedulerMetrics        MetricKind = "sched"
	PerCpuUsageMetrics             MetricKind = "percpu"
	MemoryUsageMetrics             MetricKind = "memory"
	MemoryNumaMetrics              MetricKind = "memory_numa"
	CpuLoadMetrics                 MetricKind = "cpuLoad"
	DiskIOMetrics                  MetricKind = "diskIO"
	DiskUsageMetrics               MetricKind = "disk"
	NetworkUsageMetrics            MetricKind = "network"
	NetworkTcpUsageMetrics         MetricKind = "tcp"
	NetworkAdvancedTcpUsageMetrics MetricKind = "advtcp"
	NetworkUdpUsageMetrics         MetricKind = "udp"
	AcceleratorUsageMetrics        MetricKind = "accelerator"
	AppMetrics                     MetricKind = "app"
	ProcessMetrics                 MetricKind = "process"
	HugetlbUsageMetrics            MetricKind = "hugetlb"
	PerfMetrics                    MetricKind = "perf_event"
	ReferencedMemoryMetrics        MetricKind = "referenced_memory"
	CPUTopologyMetrics             MetricKind = "cpu_topology"
	ResctrlMetrics                 MetricKind = "resctrl"
	CPUSetMetrics                  MetricKind = "cpuset"
	OOMMetrics                     MetricKind = "oom_event"
)

func (MetricKind) String added in v0.22.0

func (mk MetricKind) String() string

type MetricSet added in v0.22.0

type MetricSet map[MetricKind]struct{}

func (MetricSet) Difference added in v0.37.0

func (ms MetricSet) Difference(ms1 MetricSet) MetricSet

func (MetricSet) Has added in v0.22.0

func (ms MetricSet) Has(mk MetricKind) bool

func (*MetricSet) Set added in v0.41.0

func (ms *MetricSet) Set(value string) error

Not thread-safe, exported only for https://pkg.go.dev/flag#Value

func (MetricSet) String added in v0.41.0

func (ms MetricSet) String() string

type Plugin added in v0.34.0

type Plugin interface {
	// InitializeFSContext is invoked when populating an fs.Context object for a new manager.
	// A returned error here is fatal.
	InitializeFSContext(context *fs.Context) error

	// Register is invoked when starting a manager. It can optionally return a container watcher.
	// A returned error is logged, but is not fatal.
	Register(factory info.MachineInfoFactory, fsInfo fs.FsInfo, includedMetrics MetricSet) (watcher.ContainerWatcher, error)
}

Directories

Path Synopsis
Unmarshal's a Containers description json file.
Unmarshal's a Containers description json file.
This code has been taken from containerd repo to avoid large library import Handler for containerd containers.
This code has been taken from containerd repo to avoid large library import Handler for containerd containers.
install
The install package registers containerd.NewPlugin() as the "containerd" container provider when imported
The install package registers containerd.NewPlugin() as the "containerd" container provider when imported
Handler for CRI-O containers.
Handler for CRI-O containers.
install
The install package registers crio.NewPlugin() as the "crio" container provider when imported
The install package registers crio.NewPlugin() as the "crio" container provider when imported
Provides global docker information.
Provides global docker information.
install
The install package registers docker.NewPlugin() as the "docker" container provider when imported
The install package registers docker.NewPlugin() as the "docker" container provider when imported
Handler for "raw" containers.
Handler for "raw" containers.
install
The install package registers systemd.NewPlugin() as the "systemd" container provider when imported
The install package registers systemd.NewPlugin() as the "systemd" container provider when imported

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