network

Documentation

Index

• Constants
• func Interfaces() []string
• func InternalIP() string
• func NtpDate(log *slog.Logger, ntpServers []string)
• type Ethtool
  • func NewEthtool(log *slog.Logger) *Ethtool
  • func (e *Ethtool) Run(args ...string) (string, error)
• type Host
• type LLDPClient
  • func NewLLDPClient(log *slog.Logger, interfaces []string, minimumInterfaces, minimumNeighbors int, ...) *LLDPClient
  • func (l *LLDPClient) Start()
• type Network
  • func (n *Network) Neighbors(name string) (neighbors []*v1.MachineNic, err error)
  • func (n *Network) UpAllInterfaces() error

Constants

const (
	// LLDPTxInterval is set to 10 seconds in /etc/lldpd.d/tx-interval.conf on each leaf.
	LLDPTxInterval = 15 * time.Second

	// LLDPTxIntervalTimeout is set to double of tx-interval of lldpd on the switch side.
	// This ensures we get all lldp pdu`s.
	// We add 2 seconds to be on the save side.
	LLDPTxIntervalTimeout = (2 * LLDPTxInterval) + 2
)

const MTU = 9000

We expect to have storage and MTU of 9000 supports efficient transmission. In our clos topology MTU 9000 (non vxlan)/9216 (vxlan) is status quo.

Functions

func Interfaces

func Interfaces() []string

Interfaces return a list of all known interfaces.

func InternalIP

func InternalIP() string

InternalIP returns the first ipv4 ip of an eth* interface.

func NtpDate

func NtpDate(log *slog.Logger, ntpServers []string)

NtpDate set the system time to the time coming from a ntp source

Types

type Ethtool

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

Ethtool to query/set ethernet interfaces

func NewEthtool

func NewEthtool(log *slog.Logger) *Ethtool

NewEthtool create a new Ethtool with the default command

func (*Ethtool) Run

func (e *Ethtool) Run(args ...string) (string, error)

Run execute ethtool

type Host

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

Host collects lldp neighbor information's.

type LLDPClient

type LLDPClient struct {
	Host *Host
	// contains filtered or unexported fields
}

LLDPClient act as a small wrapper about low level lldp primitives.

func NewLLDPClient

func NewLLDPClient(log *slog.Logger, interfaces []string, minimumInterfaces, minimumNeighbors int, timeout time.Duration) *LLDPClient

NewLLDPClient create a lldp client.

func (*LLDPClient) Start

func (l *LLDPClient) Start()

Start starts lldpd for neighbor discovery.

type Network

type Network struct {
	IPAddress   string
	Started     time.Time
	MachineUUID string
	LLDPClient  *LLDPClient
	Eth0Mac     string // this mac is used to calculate the IPMI Port offset in the metal-lab environment.
	Log         *slog.Logger
}

Network provides networking operations.

func (*Network) Neighbors

func (n *Network) Neighbors(name string) (neighbors []*v1.MachineNic, err error)

Neighbors of a interface, detected via ip neighbor detection

func (*Network) UpAllInterfaces

func (n *Network) UpAllInterfaces() error

UpAllInterfaces set all available eth* interfaces up to ensure they do ipv6 link local autoconfiguration and therefore neighbor discovery, which is required to make all local mac's visible on the switch side.