network

package
v0.3.5 Latest Latest
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 Go to latest Published: Oct 11, 2023 License: Apache-2.0 Imports: 15 Imported by: 4

Documentation

Index

Constants

View Source 
const (
	DefaultPluginName = "kubernetes.io/no-op"

	// Called when the node's Pod CIDR is known when using the
	// controller manager's --allocate-node-cidrs=true option
	NET_PLUGIN_EVENT_POD_CIDR_CHANGE             = "pod-cidr-change"
	NET_PLUGIN_EVENT_POD_CIDR_CHANGE_DETAIL_CIDR = "pod-cidr"
)
View Source 
const CNITimeoutSec = 220

CNITimeoutSec is set to be slightly less than 240sec/4mins, which is the default backend runtime request timeout.

View Source 
const DefaultInterfaceName = "eth0"
View Source 
const UseDefaultMTU = 0

UseDefaultMTU is a marker value that indicates the plugin should determine its own MTU It is the zero value, so a non-initialized value will mean "UseDefault"

Variables

This section is empty.

Functions

func GetPodIPs 

func GetPodIPs(
	execer utilexec.Interface,
	nsenterPath, netnsPath, interfaceName string,
) ([]net.IP, error)

GetPodIP gets the IP of the pod by inspecting the network info inside the pod's network namespace. we are defaulting to v4 as primary

Types

type Host 

type Host interface {
	// NamespaceGetter is a getter for sandbox namespace information.
	NamespaceGetter

	// PortMappingGetter is a getter for sandbox port mapping information.
	PortMappingGetter
}

Host is an interface that plugins can use to access the kubelet. the back channel is restricted to host-ports/testing, and restricted to kubenet. No other network plugin wrapper needs it. Other plugins only require a way to access namespace information and port mapping information , which they can do directly through the embedded interfaces.

type NamespaceGetter 

type NamespaceGetter interface {
	// GetNetNS returns network namespace information for the given containerID.
	// Runtimes should *never* return an empty namespace and nil error for
	// a container; if error is nil then the namespace string must be valid.
	GetNetNS(containerID string) (string, error)
}

NamespaceGetter is an interface to retrieve namespace information for a given podSandboxID. Typically implemented by runtime shims that are closely coupled to CNI plugin wrappers like kubenet.

type NetworkPlugin 

type NetworkPlugin interface {
	// Init initializes the plugin.  This will be called exactly once
	// before any other methods are called.
	Init(host Host, hairpinMode config.HairpinMode, nonMasqueradeCIDR string, mtu int) error

	// Called on various events like:
	// NET_PLUGIN_EVENT_POD_CIDR_CHANGE
	Event(name string, details map[string]interface{})

	// Name returns the plugin's name. This will be used when searching
	// for a plugin by name, e.g.
	Name() string

	// Returns a set of NET_PLUGIN_CAPABILITY_*
	Capabilities() utilsets.Int

	// SetUpPod is the method called after the infra container of
	// the pod has been created but before the other containers of the
	// pod are launched.
	SetUpPod(
		namespace string,
		name string,
		podSandboxID config.ContainerID,
		annotations, options map[string]string,
	) error

	// TearDownPod is the method called before a pod's infra container will be deleted
	TearDownPod(namespace string, name string, podSandboxID config.ContainerID) error

	// GetPodNetworkStatus is the method called to obtain the ipv4 or ipv6 addresses of the container
	GetPodNetworkStatus(
		namespace string,
		name string,
		podSandboxID config.ContainerID,
	) (*PodNetworkStatus, error)

	// Status returns error if the network plugin is in error state
	Status() error
}

NetworkPlugin is an interface to network plugins for the kubelet

func InitNetworkPlugin 

func InitNetworkPlugin(
	plugins []NetworkPlugin,
	networkPluginName string,
	host Host,
	hairpinMode config.HairpinMode,
	nonMasqueradeCIDR string,
	mtu int,
) (NetworkPlugin, error)

InitNetworkPlugin inits the plugin that matches networkPluginName. Plugins must have unique names.

type NoopNetworkPlugin 

type NoopNetworkPlugin struct {
	Sysctl utilsysctl.Interface
}

func (*NoopNetworkPlugin) Capabilities 

func (plugin *NoopNetworkPlugin) Capabilities() utilsets.Int

func (*NoopNetworkPlugin) Event 

func (plugin *NoopNetworkPlugin) Event(name string, details map[string]interface{})

func (*NoopNetworkPlugin) GetPodNetworkStatus 

func (plugin *NoopNetworkPlugin) GetPodNetworkStatus(
	namespace string,
	name string,
	id config.ContainerID,
) (*PodNetworkStatus, error)

func (*NoopNetworkPlugin) Init 

func (plugin *NoopNetworkPlugin) Init(
	host Host,
	hairpinMode config.HairpinMode,
	nonMasqueradeCIDR string,
	mtu int,
) error

func (*NoopNetworkPlugin) Name 

func (plugin *NoopNetworkPlugin) Name() string

func (*NoopNetworkPlugin) SetUpPod 

func (plugin *NoopNetworkPlugin) SetUpPod(
	namespace string,
	name string,
	id config.ContainerID,
	annotations, options map[string]string,
) error

func (*NoopNetworkPlugin) Status 

func (plugin *NoopNetworkPlugin) Status() error

func (*NoopNetworkPlugin) TearDownPod 

func (plugin *NoopNetworkPlugin) TearDownPod(
	namespace string,
	name string,
	id config.ContainerID,
) error

type NoopPortMappingGetter 

type NoopPortMappingGetter struct{}

func (*NoopPortMappingGetter) GetPodPortMappings 

func (*NoopPortMappingGetter) GetPodPortMappings(
	containerID string,
) ([]*hostport.PortMapping, error)

type PluginManager 

type PluginManager struct {
	// contains filtered or unexported fields
}

The PluginManager wraps a kubelet network plugin and provides synchronization for a given pod's network operations. Each pod's setup/teardown/status operations are synchronized against each other, but network operations of other pods can proceed in parallel.

func NewPluginManager 

func NewPluginManager(plugin NetworkPlugin) *PluginManager

func (*PluginManager) Event 

func (pm *PluginManager) Event(name string, details map[string]interface{})

func (*PluginManager) GetPodNetworkStatus 

func (pm *PluginManager) GetPodNetworkStatus(
	podNamespace, podName string,
	id config.ContainerID,
) (*PodNetworkStatus, error)

func (*PluginManager) PluginName 

func (pm *PluginManager) PluginName() string

func (*PluginManager) SetUpPod 

func (pm *PluginManager) SetUpPod(
	podNamespace, podName string,
	id config.ContainerID,
	annotations, options map[string]string,
) error

func (*PluginManager) Status 

func (pm *PluginManager) Status() error

func (*PluginManager) TearDownPod 

func (pm *PluginManager) TearDownPod(
	podNamespace, podName string,
	id config.ContainerID,
) error

type PodNetworkStatus 

type PodNetworkStatus struct {
	metav1.TypeMeta `json:",inline"`

	// IP is the primary ipv4/ipv6 address of the pod. Among other things it is the address that -
	//   - kube expects to be reachable across the cluster
	//   - service endpoints are constructed with
	//   - will be reported in the PodStatus.PodIP field (will override the IP reported by docker)
	IP net.IP `json:"ip"  description:"Primary IP address of the pod"`
	// IPs is the list of IPs assigned to Pod. IPs[0] == IP. The rest of the list is additional IPs
	IPs []net.IP `json:"ips" description:"list of additional ips (inclusive of IP) assigned to pod"`
}

PodNetworkStatus stores the network status of a pod (currently just the primary IP address) This struct represents version "v1beta1"

type PortMappingGetter 

type PortMappingGetter interface {
	// GetPodPortMappings returns sandbox port mappings information.
	GetPodPortMappings(containerID string) ([]*hostport.PortMapping, error)
}

PortMappingGetter is an interface to retrieve port mapping information for a given podSandboxID. Typically implemented by runtime shims that are closely coupled to CNI plugin wrappers like kubenet.

Source Files

View all Source files

Directories

Path Synopsis
cni
testing
mock_cni is a mock of the `libcni.CNI` interface.
 mock_cni is a mock of the `libcni.CNI` interface.

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