util

package
v1.3.0 Latest Latest
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 Go to latest Published: Sep 4, 2021 License: Apache-2.0 Imports: 14 Imported by: 0

Documentation

Overview

Package util contains utility functions which are used in the agent implementation.

Index

Constants

View Source 
const (
	FamilyIPv4 uint8 = 4
	FamilyIPv6 uint8 = 6
)
View Source 
const (
	ContainerVNICPrefix = "vEthernet"
	HNSNetworkType      = "Transparent"
	LocalHNSNetwork     = "antrea-hnsnetwork"
	OVSExtensionID      = "583CC151-73EC-4A6A-8B47-578297AD7623"

	DefaultMetric = 256
)

Variables

This section is empty.

Functions

func ConfigureInterfaceAddress 

func ConfigureInterfaceAddress(ifaceName string, ipConfig *net.IPNet) error

ConfigureInterfaceAddress adds IPAddress on the specified interface.

func ConfigureInterfaceAddressWithDefaultGateway 

func ConfigureInterfaceAddressWithDefaultGateway(ifaceName string, ipConfig *net.IPNet, gateway string) error

ConfigureInterfaceAddressWithDefaultGateway adds IPAddress on the specified interface and sets the default gateway for the host.

func ConfigureLinkAddresses 

func ConfigureLinkAddresses(idx int, ipNets []*net.IPNet) error

ConfigureLinkAddresses adds the provided addresses to the interface identified by index idx, if they are missing from the interface. Any other existing address already configured for the interface will be removed, unless it is a link-local address. At the moment, this function only supports IPv4 addresses and will ignore any address in ipNets that is not IPv4.

func CreateHNSNetwork 

func CreateHNSNetwork(hnsNetName string, subnetCIDR *net.IPNet, nodeIP *net.IPNet, adapter *net.Interface) (*hcsshim.HNSNetwork, error)

CreateHNSNetwork creates a new HNS Network, whose type is "Transparent". The NetworkAdapter is using the host interface which is configured with Node IP. HNS Network properties "ManagementIP" and "SourceMac" are used to record the original IP and MAC addresses on the network adapter.

func CreateNetNatOnHost added in v1.3.0 

func CreateNetNatOnHost(subnetCIDR *net.IPNet) error

func DeleteHNSNetwork 

func DeleteHNSNetwork(hnsNetName string) error

func DialLocalSocket 

func DialLocalSocket(address string) (net.Conn, error)

DialLocalSocket connects to a Unix domain socket or a Windows named pipe. - If the specified address starts with "\\.\pipe\", connect to a Windows named pipe path. - Else connect to a Unix domain socket.

func EnableHNSNetworkExtension 

func EnableHNSNetworkExtension(hnsNetID string, vSwitchExtension string) error

EnableHNSNetworkExtension enables the specified vSwitchExtension on the target HNS Network. Antrea calls this function to enable OVS Extension on the HNS Network.

func EnableHostInterface 

func EnableHostInterface(ifaceName string) error

EnableHostInterface sets the specified interface status as UP.

func EnableIPForwarding 

func EnableIPForwarding(ifaceName string) error

EnableIPForwarding enables the IP interface to forward packets that arrive on this interface to other interfaces.

func EnableRSCOnVSwitch 

func EnableRSCOnVSwitch(vSwitch string) error

EnableRSCOnVSwitch enables RSC in the vSwitch to reduce host CPU utilization and increase throughput for virtual workloads by coalescing multiple TCP segments into fewer, but larger segments.

func GenerateContainerInterfaceKey 

func GenerateContainerInterfaceKey(containerID string) string

GenerateContainerInterfaceKey generates a unique string for a Pod's interface as: container/<Container-ID>. We must use ContainerID instead of PodNamespace + PodName because there could be more than one container associated with the same Pod at some point. For example, when deleting a StatefulSet Pod with 0 second grace period, the Pod will be removed from the Kubernetes API very quickly and a new Pod will be created immediately, and kubelet may process the deletion of the previous Pod and the addition of the new Pod simultaneously.

func GenerateContainerInterfaceName 

func GenerateContainerInterfaceName(podName, podNamespace, containerID string) string

GenerateContainerInterfaceName generates a unique interface name using the Pod's namespace, name and containerID. The output should be deterministic (so that multiple calls to GenerateContainerInterfaceName with the same parameters return the same value). The output has the length of interfaceNameLength(15). The probability of collision should be neglectable.

func GenerateNodeTunnelInterfaceKey 

func GenerateNodeTunnelInterfaceKey(nodeName string) string

GenerateNodeTunnelInterfaceKey generates a unique string for a Node's tunnel interface as: node/<Node-name>.

func GenerateNodeTunnelInterfaceName 

func GenerateNodeTunnelInterfaceName(nodeName string) string

GenerateNodeTunnelInterfaceName generates a unique interface name for the tunnel to the Node, using the Node's name.

func GetDNServersByInterfaceIndex 

func GetDNServersByInterfaceIndex(ifIndex int) (string, error)

GetDNServersByInterfaceIndex returns the DNS servers configured on the specified interface.

func GetDefaultGatewayByInterfaceIndex 

func GetDefaultGatewayByInterfaceIndex(ifIndex int) (string, error)

GetDefaultGatewayByInterfaceIndex returns the default gateway configured on the specified interface.

func GetHostInterfaceStatus 

func GetHostInterfaceStatus(ifaceName string) (string, error)

func GetIPNetDeviceByName added in v1.2.4 

func GetIPNetDeviceByName(ifaceName string) (v4IPNet *net.IPNet, v6IPNet *net.IPNet, link *net.Interface, err error)

func GetIPNetDeviceFromIP 

func GetIPNetDeviceFromIP(localIPs *ip.DualStackIPs) (v4IPNet *net.IPNet, v6IPNet *net.IPNet, iface *net.Interface, err error)

GetIPNetDeviceFromIP returns local IPs/masks and associated device from IP.

func GetIPWithFamily 

func GetIPWithFamily(ips []net.IP, addrFamily uint8) (net.IP, error)

func GetIPv4Addr 

func GetIPv4Addr(ips []net.IP) net.IP

func GetLocalBroadcastIP 

func GetLocalBroadcastIP(ipNet *net.IPNet) net.IP

GetLocalBroadcastIP returns the last IP address in a subnet. This IP is always working as the broadcast address in the subnet on Windows, and an active route entry that uses it as the destination is added by default when a new IP is configured on the interface.

func GetNSPath 

func GetNSPath(containerNetNS string) (string, error)

func HostInterfaceExists 

func HostInterfaceExists(ifaceName string) bool

func IsVirtualAdapter added in v1.2.0 

func IsVirtualAdapter(name string) (bool, error)

IsVirtualAdapter checks if the provided adapter is virtual.

func ListenLocalSocket 

func ListenLocalSocket(address string) (net.Listener, error)

ListenLocalSocket creates a listener on a Unix domain socket or a Windows named pipe. - If the specified address starts with "\\.\pipe\", create a listener on the a Windows named pipe path. - Else create a listener on a local Unix domain socket.

func NewNetRoute added in v1.2.0 

func NewNetRoute(route *Route) error

func PrepareHNSNetwork 

func PrepareHNSNetwork(subnetCIDR *net.IPNet, nodeIPNet *net.IPNet, uplinkAdapter *net.Interface) error

PrepareHNSNetwork creates HNS Network for containers.

func RemoveInterfaceAddress 

func RemoveInterfaceAddress(ifaceName string, ipAddr net.IP) error

RemoveInterfaceAddress removes IPAddress from the specified interface.

func RemoveManagementInterface 

func RemoveManagementInterface(networkName string) error

RemoveManagementInterface removes the management interface of the HNS Network, and then the physical interface can be added to the OVS bridge. This function is called only if Hyper-V feature is installed on the host.

func RemoveNetRoute added in v1.2.0 

func RemoveNetRoute(route *Route) error

func SetAdapterDNSServers 

func SetAdapterDNSServers(adapterName, dnsServers string) error

SetAdapterDNSServers configures DNSServers on network adapter.

func SetAdapterMACAddress 

func SetAdapterMACAddress(adapterName string, macConfig *net.HardwareAddr) error

ConfigureMACAddress set specified MAC address on interface.

func SetInterfaceMTU 

func SetInterfaceMTU(ifaceName string, mtu int) error

SetInterfaceMTU configures interface MTU on host for Pods. MTU change cannot be realized with HNSEndpoint because there's no MTU field in HNSEndpoint: https://github.com/Microsoft/hcsshim/blob/4a468a6f7ae547974bc32911395c51fb1862b7df/internal/hns/hnsendpoint.go#L12

func SetLinkUp 

func SetLinkUp(name string) (net.HardwareAddr, int, error)

func WindowsHyperVEnabled 

func WindowsHyperVEnabled() (bool, error)

WindowsHyperVEnabled checks if the Hyper-V is enabled on the host. Hyper-V feature contains multiple components/sub-features. According to the test, OVS requires "Microsoft-Hyper-V" feature to be enabled.

Types

type ExtensionsPolicy 

type ExtensionsPolicy struct {
	Extensions []vSwitchExtensionPolicy `json:"Extensions"`
}

type LinkNotFound 

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

type Route added in v1.2.0 

type Route struct {
	LinkIndex         int
	DestinationSubnet *net.IPNet
	GatewayAddress    net.IP
	RouteMetric       int
}

func GetNetRoutes added in v1.2.0 

func GetNetRoutes(linkIndex int, dstSubnet *net.IPNet) ([]Route, error)

func GetNetRoutesAll added in v1.2.0 

func GetNetRoutesAll() ([]Route, error)

Source Files

View all Source files

Directories

Path Synopsis
Package ethtool provides Go wrappers for ioctl ethtool system calls on Linux
 Package ethtool provides Go wrappers for ioctl ethtool system calls on Linux
Package ndp contains functions to send NDP neighbor advertisement on Linux.
 Package ndp contains functions to send NDP neighbor advertisement on Linux.
Package systcl contains utility functions to read and write sysctl configuration on Linux.
 Package systcl contains utility functions to read and write sysctl configuration on Linux.
Package winfirewall contains utility functions to configure the Windows firewall.
 Package winfirewall contains utility functions to configure the Windows firewall.

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