util

package
v1.4.1 Latest Latest
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 Go to latest Published: Jun 15, 2021 License: MIT Imports: 11 Imported by: 3

Documentation

Overview

Copyright 2018 Microsoft. All rights reserved. MIT License

Copyright 2018 Microsoft. All rights reserved. MIT License

Index

Constants

View Source 
const (
	KubeSystemFlag             string = "kube-system"
	KubePodTemplateHashFlag    string = "pod-template-hash"
	KubeAllPodsFlag            string = "all-pod"
	KubeAllNamespacesFlag      string = "all-namespaces"
	KubeAppFlag                string = "k8s-app"
	KubeProxyFlag              string = "kube-proxy"
	KubePodStatusFailedFlag    string = "Failed"
	KubePodStatusSucceededFlag string = "Succeeded"
	KubePodStatusUnknownFlag   string = "Unknown"
)

kubernetes related constants.

View Source 
const (
	Iptables                  string = "iptables"
	Ip6tables                 string = "ip6tables"
	IptablesSave              string = "iptables-save"
	IptablesRestore           string = "iptables-restore"
	IptablesConfigFile        string = "/var/log/iptables.conf"
	IptablesTestConfigFile    string = "/var/log/iptables-test.conf"
	IptablesLockFile          string = "/run/xtables.lock"
	IptablesChainCreationFlag string = "-N"
	IptablesInsertionFlag     string = "-I"
	IptablesAppendFlag        string = "-A"
	IptablesDeletionFlag      string = "-D"
	IptablesFlushFlag         string = "-F"
	IptablesCheckFlag         string = "-C"
	IptablesDestroyFlag       string = "-X"
	IptablesJumpFlag          string = "-j"
	IptablesWaitFlag          string = "-w"
	IptablesAccept            string = "ACCEPT"
	IptablesReject            string = "REJECT"
	IptablesDrop              string = "DROP"
	IptablesReturn            string = "RETURN"
	IptablesMark              string = "MARK"
	IptablesSrcFlag           string = "src"
	IptablesDstFlag           string = "dst"
	IptablesNotFlag           string = "!"
	IptablesProtFlag          string = "-p"
	IptablesSFlag             string = "-s"
	IptablesDFlag             string = "-d"
	IptablesDstPortFlag       string = "--dport"
	IptablesModuleFlag        string = "-m"
	IptablesSetModuleFlag     string = "set"
	IptablesMatchSetFlag      string = "--match-set"
	IptablesSetMarkFlag       string = "--set-mark"
	IptablesMarkFlag          string = "--mark"
	IptablesMarkVerb          string = "mark"
	IptablesStateModuleFlag   string = "state"
	IptablesStateFlag         string = "--state"
	IptablesMultiportFlag     string = "multiport"
	IptablesMultiDestportFlag string = "--dports"
	IptablesRelatedState      string = "RELATED"
	IptablesEstablishedState  string = "ESTABLISHED"
	IptablesFilterTable       string = "filter"
	IptablesCommentModuleFlag string = "comment"
	IptablesCommentFlag       string = "--comment"
	IptablesAddCommentFlag
	IptablesAzureChain             string = "AZURE-NPM"
	IptablesAzureAcceptChain       string = "AZURE-NPM-ACCEPT"
	IptablesAzureKubeSystemChain   string = "AZURE-NPM-KUBE-SYSTEM"
	IptablesAzureIngressChain      string = "AZURE-NPM-INGRESS"
	IptablesAzureIngressPortChain  string = "AZURE-NPM-INGRESS-PORT"
	IptablesAzureIngressFromChain  string = "AZURE-NPM-INGRESS-FROM"
	IptablesAzureEgressChain       string = "AZURE-NPM-EGRESS"
	IptablesAzureEgressPortChain   string = "AZURE-NPM-EGRESS-PORT"
	IptablesAzureEgressToChain     string = "AZURE-NPM-EGRESS-TO"
	IptablesKubeServicesChain      string = "KUBE-SERVICES"
	IptablesForwardChain           string = "FORWARD"
	IptablesInputChain             string = "INPUT"
	IptablesAzureIngressDropsChain string = "AZURE-NPM-INGRESS-DROPS"
	IptablesAzureEgressDropsChain  string = "AZURE-NPM-EGRESS-DROPS"
	// Below chain exists only in NPM before v1.2.6
	// TODO delete this below set while cleaning up
	IptablesAzureTargetSetsChain string = "AZURE-NPM-TARGET-SETS"
	// Below chain existing only in NPM before v1.2.7
	IptablesAzureIngressWrongDropsChain string = "AZURE-NPM-INRGESS-DROPS"
	// Below chains exists only for before Azure-NPM:v1.0.27
	// and should be removed after a baking period.
	IptablesAzureIngressFromNsChain  string = "AZURE-NPM-INGRESS-FROM-NS"
	IptablesAzureIngressFromPodChain string = "AZURE-NPM-INGRESS-FROM-POD"
	IptablesAzureEgressToNsChain     string = "AZURE-NPM-EGRESS-TO-NS"
	IptablesAzureEgressToPodChain    string = "AZURE-NPM-EGRESS-TO-POD"
	// Below are the skb->mark NPM will use for different criteria
	IptablesAzureIngressMarkHex string = "0x2000"
	// IptablesAzureEgressXMarkHex is used for us to not override but append to the existing MARK
	// https://unix.stackexchange.com/a/283455 comment contains the explanation on
	// MARK manipulations with offset.
	IptablesAzureEgressXMarkHex string = "0x1000/0x1000"
	// IptablesAzureEgressMarkHex is for checking the absolute value of the mark
	IptablesAzureEgressMarkHex string = "0x1000"
	IptablesAzureAcceptMarkHex string = "0x3000"
	IptablesAzureClearMarkHex  string = "0x0"
)

iptables related constants.

View Source 
const (
	Ipset               string = "ipset"
	IpsetSaveFlag       string = "save"
	IpsetRestoreFlag    string = "restore"
	IpsetConfigFile     string = "/var/log/ipset.conf"
	IpsetTestConfigFile string = "/var/log/ipset-test.conf"
	IpsetCreationFlag   string = "-N"
	IpsetAppendFlag     string = "-A"
	IpsetDeletionFlag   string = "-D"
	IpsetFlushFlag      string = "-F"
	IpsetDestroyFlag    string = "-X"

	IpsetExistFlag     string = "-exist"
	IpsetFileFlag      string = "-file"
	IPsetCheckListFlag string = "list"
	IpsetTestFlag      string = "test"

	IpsetSetGenericFlag string = "setgeneric" // not used in ipset commands, used as an internal identifier for nethash/hash:ip,port
	IpsetSetListFlag    string = "setlist"
	IpsetNetHashFlag    string = "nethash"
	IpsetIPPortHashFlag string = "hash:ip,port"

	IpsetUDPFlag  string = "udp:"
	IpsetSCTPFlag string = "sctp:"
	IpsetTCPFlag  string = "tcp:"

	IpsetLabelDelimter string = ":"

	AzureNpmFlag   string = "azure-npm"
	AzureNpmPrefix string = "azure-npm-"

	IpsetMaxelemName string = "maxelem"
	IpsetMaxelemNum  string = "4294967295"

	IpsetNomatch string = "nomatch"

	//Prefixes for ipsets
	NamedPortIPSetPrefix string = "namedport:"

	NamespacePrefix string = "ns-"
)

ipset related constants.

View Source 
const (
	AddNamespaceEvent    string = "Add Namespace"
	UpdateNamespaceEvent string = "Update Namespace"
	DeleteNamespaceEvent string = "Delete Namespace"

	AddPodEvent    string = "Add Pod"
	UpdatePodEvent string = "Update Pod"
	DeletePodEvent string = "Delete Pod"

	AddNetworkPolicyEvent    string = "Add network policy"
	UpdateNetworkPolicyEvent string = "Update network policy"
	DeleteNetworkPolicyEvent string = "Delete network policy"

	ErrorMetric  string = "ErrorMetric"
	PackageName  string = "PackageName"
	FunctionName string = "FunctionName"
	ErrorCode    string = "ErrorCode"

	// Default batch size in AI telemetry
	// Defined here https://docs.microsoft.com/en-us/azure/azure-monitor/app/pricing
	BatchSizeInBytes          int = 32768
	BatchIntervalInSecs       int = 30
	RefreshTimeoutInSecs      int = 15
	GetEnvRetryCount          int = 5
	GetEnvRetryWaitTimeInSecs int = 3
	AiInitializeRetryCount    int = 3
	AiInitializeRetryInMin    int = 1

	DebugMode bool = true

	ErrorValue float64 = 1
)

NPM telemetry constants.

View Source 
const (
	NpmID int = iota + 1
	IpsmID
	IptmID
	NSID
	PodID
	NetpolID
	UtilID
)

These ID represents where did the error log generate from. It's for better query purpose. In Kusto these value are used in OperationID column

Variables

View Source 
var IsNewNwPolicyVerFlag = false

IsNewNwPolicyVerFlag indicates if the current kubernetes version is newer than 1.11 or not

Functions

func AppendMap 

func AppendMap(base, new map[string]string) map[string]string

AppendMap appends new to base.

func ClearAndAppendMap 

func ClearAndAppendMap(base, new map[string]string) map[string]string

ClearAndAppendMap clears base and appends new to base.

func CompareK8sVer 

func CompareK8sVer(firstVer *version.Info, secondVer *version.Info) int

CompareK8sVer compares two k8s versions. returns -1, 0, 1 if firstVer smaller, equals, bigger than secondVer respectively. returns -2 for error.

func CompareResourceVersions 

func CompareResourceVersions(rvOld string, rvNew string) bool

CompareResourceVersions take in two resource versions and returns true if new is greater than old

func CompareUintResourceVersions 

func CompareUintResourceVersions(rvOld uint64, rvNew uint64) bool

CompareUintResourceVersions take in two resource versions as uint and returns true if new is greater than old

func DropEmptyFields 

func DropEmptyFields(s []string) []string

DropEmptyFields deletes empty entries from a slice.

func Exists 

func Exists(filePath string) bool

Exists reports whether the named file or directory exists.

func GetClusterID 

func GetClusterID(nodeName string) string

GetClusterID retrieves cluster ID through node name. (Azure-specific)

func GetHashedName 

func GetHashedName(name string) string

GetHashedName returns hashed ipset name.

func GetIPSetListCompareLabels 

func GetIPSetListCompareLabels(orig map[string]string, new map[string]string) ([]string, []string)

GetIPSetListCompareLabels compares Labels and returns a delete ipset list and add ipset list

func GetIPSetListFromLabels 

func GetIPSetListFromLabels(labels map[string]string) []string

GetIPSetListFromLabels combine Labels into a single slice

func GetIpSetFromLabelKV 

func GetIpSetFromLabelKV(k, v string) string

func GetLabelKVFromSet 

func GetLabelKVFromSet(ipsetName string) (string, string)

func GetLabelsWithoutOperators 

func GetLabelsWithoutOperators(labels []string) []string

GetLabelsWithoutOperators returns labels without operators.

func GetNSNameWithPrefix 

func GetNSNameWithPrefix(nsName string) string

GetNSNameWithPrefix returns Namespace name with ipset prefix

func GetObjKeyFunc 

func GetObjKeyFunc(obj interface{}) (string, error)

GetObjKeyFunc will return obj's key

func GetOperatorAndLabel 

func GetOperatorAndLabel(label string) (string, string)

GetOperatorAndLabel returns the operator associated with the label and the label without operator.

func GetSetsFromLabels 

func GetSetsFromLabels(labels map[string]string) []string

GetSetsFromLabels for a given map of labels will return ipset names

func Hash 

func Hash(s string) string

Hash hashes a string to another string with length <= 32.

func IsNewNwPolicyVer added in v1.0.18 

func IsNewNwPolicyVer(ver *version.Info) (bool, error)

IsNewNwPolicyVer checks if the current k8s version >= 1.11, if so, then the networkPolicy should support 'AND' between namespaceSelector & podSelector.

func ParseResourceVersion 

func ParseResourceVersion(rv string) uint64

ParseResourceVersion get uint64 version of ResourceVersion

func SetIsNewNwPolicyVerFlag added in v1.0.18 

func SetIsNewNwPolicyVerFlag(ver *version.Info) error

SetIsNewNwPolicyVerFlag sets IsNewNwPolicyVerFlag variable depending on version.

func SortMap 

func SortMap(m *map[string]string) ([]string, []string)

SortMap sorts the map by key in alphabetical order. Note: even though the map is sorted, accessing it through range will still result in random order.

func UniqueStrSlice 

func UniqueStrSlice(s []string) []string

UniqueStrSlice removes duplicate elements from the input string.

Types

This section is empty.

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