networkutils

Documentation

Overview

Package networkutils is a collection of iptables and netlink functions

Index

• func GeneratePodHostVethName(prefix string, podNamespace string, podName string) string
• func GeneratePodHostVethNameSuffix(podNamespace string, podName string) string
• func GetConfigForDebug() map[string]interface{}
• func GetEthernetMTU(envMTUValue string) int
• func IncrementIPv4Addr(ip net.IP) (net.IP, error)
• type NetworkAPIs
  • func New() NetworkAPIs

Functions

func GeneratePodHostVethName

func GeneratePodHostVethName(prefix string, podNamespace string, podName string) string

GeneratePodHostVethName generates the name for Pod's host-side veth device. The veth name is generated in a way that aligns with the value expected by Calico for NetworkPolicy enforcement.

func GeneratePodHostVethNameSuffix

func GeneratePodHostVethNameSuffix(podNamespace string, podName string) string

GeneratePodHostVethNameSuffix generates the name suffix for Pod's hostVeth.

func GetConfigForDebug

func GetConfigForDebug() map[string]interface{}

GetConfigForDebug returns the active values of the configuration env vars (for debugging purposes).

func GetEthernetMTU

func GetEthernetMTU(envMTUValue string) int

GetEthernetMTU gets the MTU setting from AWS_VPC_ENI_MTU if set, or takes the passed in string. Defaults to 9001 if not set.

func IncrementIPv4Addr

func IncrementIPv4Addr(ip net.IP) (net.IP, error)

IncrementIPv4Addr returns incremented IPv4 address

Types

type NetworkAPIs

type NetworkAPIs interface {
	// SetupNodeNetwork performs node level network configuration
	SetupHostNetwork(vpcCIDRs []string, primaryMAC string, primaryAddr *net.IP, enablePodENI bool,
		v4Enabled bool, v6Enabled bool) error
	// SetupENINetwork performs ENI level network configuration. Not needed on the primary ENI
	SetupENINetwork(eniIP string, mac string, deviceNumber int, subnetCIDR string) error
	// UpdateHostIptablesRules updates the nat table iptables rules on the host
	UpdateHostIptablesRules(vpcCIDRs []string, primaryMAC string, primaryAddr *net.IP, v4Enabled bool, v6Enabled bool) error
	UseExternalSNAT() bool
	GetExcludeSNATCIDRs() []string
	GetExternalServiceCIDRs() []string
	GetRuleList() ([]netlink.Rule, error)
	GetRuleListBySrc(ruleList []netlink.Rule, src net.IPNet) ([]netlink.Rule, error)
	UpdateRuleListBySrc(ruleList []netlink.Rule, src net.IPNet) error
	UpdateExternalServiceIpRules(ruleList []netlink.Rule, externalIPs []string) error
	GetLinkByMac(mac string, retryInterval time.Duration) (netlink.Link, error)
}

NetworkAPIs defines the host level and the ENI level network related operations

func New

func New() NetworkAPIs

New creates a linuxNetwork object