links

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 Go to latest Published: Aug 20, 2023 License: BSD-3-Clause Imports: 13 Imported by: 0

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Index

Constants

View Source 
const (
	LinkDeploymentStateNotDeployed = iota
	LinkDeploymentStateDeployed
)
View Source 
const (
	LinkEndpointTypeVeth   = "veth"
	LinkEndpointTypeBridge = "bridge"
	LinkEndpointTypeHost   = "host"
)
View Source 
const (
	MacVlanModeBridge   = "bridge"
	MacVlanModeVepa     = "vepa"
	MacVlanModePassthru = "passthru"
	MacVlanModePrivate  = "private"
	MacVlanModeSource   = "source"
)
View Source 
const (
	// containerlab's reserved OUI.
	ClabOUI = "aa:c1:ab"
)

Variables

This section is empty.

Functions

func CheckBridgeExists 

func CheckBridgeExists(n Node) error

CheckBridgeExists verifies that the given bridge is present in the network namespace referenced via the provided nspath handle.

func CheckEndpointDoesNotExistYet 

func CheckEndpointDoesNotExistYet(e Endpoint) error

CheckEndpointDoesNotExistYet verifies that the interface referenced in the provided endpoint does not yet exist in the referenced node.

func CheckEndpointExists 

func CheckEndpointExists(e Endpoint) error

CheckEndpointExists checks that a certain interface exists in the network namespace of the given node.

func CheckEndpointUniqueness 

func CheckEndpointUniqueness(e Endpoint) error

CheckEndpointUniqueness checks that the given endpoint appears only once for the node it is assigned to.

func SetMgmtNetUnderlayingBridge 

func SetMgmtNetUnderlayingBridge(bridge string) error

func SetNameMACAndUpInterface 

func SetNameMACAndUpInterface(l netlink.Link, endpt Endpoint) func(ns.NetNS) error

SetNameMACAndUpInterface is a helper function that will bind interface name and Mac and return a function that can run in the netns.Do() call for execution in a network namespace

Types

type Endpoint 

type Endpoint interface {
	GetNode() Node
	GetIfaceName() string
	GetRandIfaceName() string
	GetMac() net.HardwareAddr
	String() string
	// GetLink retrieves the link that the endpoint is assigned to
	GetLink() Link
	// Verify verifies that the endpoint is valid and can be deployed
	Verify(*VerifyLinkParams) error
	// HasSameNodeAndInterface returns true if an endpoint that implements this interface
	// has the same node and interface name as the given endpoint.
	HasSameNodeAndInterface(ept Endpoint) bool
	Remove() error
}

Endpoint is the interface that all endpoint types implement. Endpoints like bridge, host, veth and macvlan are the types implementing this interface.

type EndpointBridge 

type EndpointBridge struct {
	EndpointGeneric
}

func (*EndpointBridge) Verify 

func (e *EndpointBridge) Verify(p *VerifyLinkParams) error

type EndpointGeneric 

type EndpointGeneric struct {
	Node      Node
	IfaceName string
	// Link is the link this endpoint belongs to.
	Link Link
	MAC  net.HardwareAddr
	// contains filtered or unexported fields
}

EndpointGeneric is the generic endpoint struct that is used by all endpoint types.

func NewEndpointGeneric 

func NewEndpointGeneric(node Node, iface string) *EndpointGeneric

func (*EndpointGeneric) GetIfaceName 

func (e *EndpointGeneric) GetIfaceName() string
func (e *EndpointGeneric) GetLink() Link

func (*EndpointGeneric) GetMac 

func (e *EndpointGeneric) GetMac() net.HardwareAddr

func (*EndpointGeneric) GetNode 

func (e *EndpointGeneric) GetNode() Node

func (*EndpointGeneric) GetRandIfaceName 

func (e *EndpointGeneric) GetRandIfaceName() string

func (*EndpointGeneric) HasSameNodeAndInterface 

func (e *EndpointGeneric) HasSameNodeAndInterface(ept Endpoint) bool

HasSameNodeAndInterface returns true if the given endpoint has the same node and interface name as the `ept` endpoint.

func (*EndpointGeneric) Remove 

func (e *EndpointGeneric) Remove() error

func (*EndpointGeneric) String 

func (e *EndpointGeneric) String() string

type EndpointHost 

type EndpointHost struct {
	EndpointGeneric
}

func (*EndpointHost) Verify 

func (e *EndpointHost) Verify(_ *VerifyLinkParams) error

type EndpointMacVlan 

type EndpointMacVlan struct {
	EndpointGeneric
}

func (*EndpointMacVlan) Verify 

func (e *EndpointMacVlan) Verify(_ *VerifyLinkParams) error

Verify verifies the veth based deployment pre-conditions

type EndpointRaw 

type EndpointRaw struct {
	Node  string `yaml:"node"`
	Iface string `yaml:"interface"`
	MAC   string `yaml:"mac,omitempty"`
}

EndpointRaw is the raw (string) representation of an endpoint as defined in the topology file for a given link definition.

func NewEndpointRaw 

func NewEndpointRaw(node, nodeIf, Mac string) *EndpointRaw

NewEndpointRaw creates a new EndpointRaw struct.

func (*EndpointRaw) Resolve 

func (er *EndpointRaw) Resolve(params *ResolveParams, l Link) (Endpoint, error)

Resolve resolves the EndpointRaw into an Endpoint interface that is implemented by a concrete endpoint struct such as EndpointBridge, EndpointHost, EndpointVeth. The type of an endpoint is determined by the node it belongs to. Resolving a raw endpoint adds an associated Link and Node to the endpoint. It also adds the endpoint to the node.

type EndpointVeth 

type EndpointVeth struct {
	EndpointGeneric
}

func (*EndpointVeth) Verify 

func (e *EndpointVeth) Verify(_ *VerifyLinkParams) error

Verify verifies the veth based deployment pre-conditions

type GenericLinkNode 

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

func (*GenericLinkNode) AddEndpoint 

func (g *GenericLinkNode) AddEndpoint(e Endpoint)
func (g *GenericLinkNode) AddLink(l Link)

func (*GenericLinkNode) AddLinkToContainer 

func (g *GenericLinkNode) AddLinkToContainer(_ context.Context, link netlink.Link, f func(ns.NetNS) error) error

func (*GenericLinkNode) ExecFunction 

func (g *GenericLinkNode) ExecFunction(f func(ns.NetNS) error) error

func (*GenericLinkNode) GetEndpoints 

func (g *GenericLinkNode) GetEndpoints() []Endpoint

func (*GenericLinkNode) GetShortName 

func (g *GenericLinkNode) GetShortName() string

func (*GenericLinkNode) GetState 

func (g *GenericLinkNode) GetState() state.NodeState
type Link interface {
	// Deploy deploys the link.
	Deploy(context.Context) error
	// Remove removes the link.
	Remove(context.Context) error
	// GetType returns the type of the link.
	GetType() LinkType
	// GetEndpoints returns the endpoints of the link.
	GetEndpoints() []Endpoint
}

Link is an interface that all concrete link types must implement. Concrete link types are resolved from raw links and become part of CLab.Links.

type LinkBriefRaw 

type LinkBriefRaw struct {
	Endpoints        []string `yaml:"endpoints"`
	LinkCommonParams `yaml:",inline,omitempty"`
}

LinkBriefRaw is the representation of any supported link in a brief format as defined in the topology file.

func (*LinkBriefRaw) GetType 

func (l *LinkBriefRaw) GetType() LinkType

func (*LinkBriefRaw) Resolve 

func (l *LinkBriefRaw) Resolve(_ *ResolveParams) (Link, error)
func (l *LinkBriefRaw) ToTypeSpecificRawLink() (RawLink, error)

ToTypeSpecificRawLink resolves the brief link into a concrete RawLink implementation. LinkBrief is only used to have a short version of a link definition in the topology file, with ToRawLink we convert it into one of the supported link types.

type LinkCommonParams 

type LinkCommonParams struct {
	MTU    int                    `yaml:"mtu,omitempty"`
	Labels map[string]string      `yaml:"labels,omitempty"`
	Vars   map[string]interface{} `yaml:"vars,omitempty"`
}

LinkCommonParams represents the common parameters for all link types.

type LinkDefinition 

type LinkDefinition struct {
	Type string  `yaml:"type,omitempty"`
	Link RawLink `yaml:",inline"`
}

LinkDefinition represents a link definition in the topology file.

func (*LinkDefinition) MarshalYAML 

func (r *LinkDefinition) MarshalYAML() (interface{}, error)

MarshalYAML serializes LinkDefinition (e.g when used with generate command). As of now it falls back to converting the LinkConfig into a RawVEthLink, such that the generated LinkConfigs adhere to the new LinkDefinition format instead of the brief one.

func (*LinkDefinition) UnmarshalYAML 

func (ld *LinkDefinition) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML deserializes links passed via topology file into LinkDefinition struct. It supports both the brief and specific link type notations.

type LinkDeploymentState 

type LinkDeploymentState uint8

type LinkEndpointType 

type LinkEndpointType string

type LinkHostRaw 

type LinkHostRaw struct {
	LinkCommonParams `yaml:",inline"`
	HostInterface    string       `yaml:"host-interface"`
	Endpoint         *EndpointRaw `yaml:"endpoint"`
}

LinkHostRaw is the raw (string) representation of a host link as defined in the topology file.

func (*LinkHostRaw) GetType 

func (r *LinkHostRaw) GetType() LinkType

func (*LinkHostRaw) Resolve 

func (r *LinkHostRaw) Resolve(params *ResolveParams) (Link, error)

func (*LinkHostRaw) ToLinkBriefRaw 

func (r *LinkHostRaw) ToLinkBriefRaw() *LinkBriefRaw

ToLinkBriefRaw converts the raw link into a LinkConfig.

type LinkMacVlan 

type LinkMacVlan struct {
	LinkCommonParams
	HostEndpoint Endpoint
	NodeEndpoint Endpoint
	Mode         MacVlanMode
}

func (*LinkMacVlan) Deploy 

func (l *LinkMacVlan) Deploy(ctx context.Context) error

func (*LinkMacVlan) GetEndpoints 

func (l *LinkMacVlan) GetEndpoints() []Endpoint

func (*LinkMacVlan) GetParentInterfaceMtu 

func (l *LinkMacVlan) GetParentInterfaceMtu() (int, error)

func (*LinkMacVlan) GetType 

func (l *LinkMacVlan) GetType() LinkType

func (*LinkMacVlan) Remove 

func (l *LinkMacVlan) Remove(_ context.Context) error

type LinkMacVlanRaw 

type LinkMacVlanRaw struct {
	LinkCommonParams `yaml:",inline"`
	HostInterface    string       `yaml:"host-interface"`
	Endpoint         *EndpointRaw `yaml:"endpoint"`
	Mode             string       `yaml:"mode"`
}

LinkMacVlanRaw is the raw (string) representation of a macvlan link as defined in the topology file.

func (*LinkMacVlanRaw) GetType 

func (r *LinkMacVlanRaw) GetType() LinkType

func (*LinkMacVlanRaw) Resolve 

func (r *LinkMacVlanRaw) Resolve(params *ResolveParams) (Link, error)

func (*LinkMacVlanRaw) ToLinkBriefRaw 

func (r *LinkMacVlanRaw) ToLinkBriefRaw() *LinkBriefRaw

ToLinkBriefRaw converts the raw link into a LinkConfig.

type LinkMgmtNetRaw 

type LinkMgmtNetRaw struct {
	LinkCommonParams `yaml:",inline"`
	HostInterface    string       `yaml:"host-interface"`
	Endpoint         *EndpointRaw `yaml:"endpoint"`
}

func (*LinkMgmtNetRaw) GetType 

func (r *LinkMgmtNetRaw) GetType() LinkType

func (*LinkMgmtNetRaw) Resolve 

func (r *LinkMgmtNetRaw) Resolve(params *ResolveParams) (Link, error)

func (*LinkMgmtNetRaw) ToLinkBriefRaw 

func (r *LinkMgmtNetRaw) ToLinkBriefRaw() *LinkBriefRaw

type LinkType 

type LinkType string

LinkType represents the type of a link definition. 

const (
	LinkTypeVEth    LinkType = "veth"
	LinkTypeMgmtNet LinkType = "mgmt-net"
	LinkTypeMacVLan LinkType = "macvlan"
	LinkTypeHost    LinkType = "host"

	// LinkTypeBrief is a link definition where link types
	// are encoded in the endpoint definition as string and allow users
	// to quickly type out link endpoints in a yaml file.
	LinkTypeBrief LinkType = "brief"
)

type LinkVEth 

type LinkVEth struct {
	LinkCommonParams
	Endpoints []Endpoint
	// contains filtered or unexported fields
}

func (*LinkVEth) Deploy 

func (l *LinkVEth) Deploy(ctx context.Context) error

func (*LinkVEth) GetEndpoints 

func (l *LinkVEth) GetEndpoints() []Endpoint

func (*LinkVEth) GetType 

func (*LinkVEth) GetType() LinkType

func (*LinkVEth) Remove 

func (*LinkVEth) Remove(_ context.Context) error

func (*LinkVEth) Verify 

func (*LinkVEth) Verify()

type LinkVEthRaw 

type LinkVEthRaw struct {
	LinkCommonParams `yaml:",inline"`
	Endpoints        []*EndpointRaw `yaml:"endpoints"`
}

LinkVEthRaw is the raw (string) representation of a veth link as defined in the topology file.

func (*LinkVEthRaw) GetType 

func (*LinkVEthRaw) GetType() LinkType

func (*LinkVEthRaw) Resolve 

func (r *LinkVEthRaw) Resolve(params *ResolveParams) (Link, error)

Resolve resolves the raw veth link definition into a Link interface that is implemented by a concrete LinkVEth struct. Resolving a veth link resolves its endpoints.

func (*LinkVEthRaw) ToLinkBriefRaw 

func (r *LinkVEthRaw) ToLinkBriefRaw() *LinkBriefRaw

ToLinkBriefRaw converts the raw link into a LinkConfig.

type MacVlanMode 

type MacVlanMode string

func MacVlanModeParse 

func MacVlanModeParse(s string) (MacVlanMode, error)

type Node 

type Node interface {
	// AddLinkToContainer adds a link to the node (container).
	// In case of a regular container, it will push the link into the
	// network namespace and then run the function f within the namespace
	// this is to rename the link, set mtu, set the interface up, e.g. see link.SetNameMACAndUpInterface()
	//
	// In case of a bridge node (ovs or regular linux bridge) it will take the interface and make the bridge
	// the master of the interface and bring the interface up.
	AddLinkToContainer(ctx context.Context, link netlink.Link, f func(ns.NetNS) error) error
	AddLink(l Link)
	// AddEndpoint adds the Endpoint to the node
	AddEndpoint(e Endpoint)
	GetLinkEndpointType() LinkEndpointType
	GetShortName() string
	GetEndpoints() []Endpoint
	ExecFunction(func(ns.NetNS) error) error
	GetState() state.NodeState
}

Node interface is an interface that is satisfied by all nodes. It is used a subset of the nodes.Node interface and is used to pass nodes.Nodes to the link resolver without causing a circular dependency.

func GetHostLinkNode 

func GetHostLinkNode() Node

GetHostLinkNode returns the host link node singleton.

func GetMgmtBrLinkNode 

func GetMgmtBrLinkNode() Node
type RawLink interface {
	Resolve(params *ResolveParams) (Link, error)
	GetType() LinkType
}

RawLink is an interface that all raw link types must implement. Raw link types define the links as they are defined in the topology file and solely a product of unmarshalling. Raw links are later "resolved" to concrete link types (e.g LinkVeth).

type ResolveParams 

type ResolveParams struct {
	Nodes          map[string]Node
	MgmtBridgeName string
}

ResolveParams is a struct that is passed to the Resolve() function of a raw link to resolve it to a concrete link type. Parameters include all nodes of a topology and the name of the management bridge.

type VerifyLinkParams 

type VerifyLinkParams struct {
	RunBridgeExistsCheck bool
}

func NewVerifyLinkParams 

func NewVerifyLinkParams() *VerifyLinkParams

Source Files

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