utils

package
v2.1.2 Latest Latest
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 Go to latest Published: May 14, 2024 License: Apache-2.0 Imports: 25 Imported by: 1

Documentation

Index

Constants

View Source 
const (
	// FamillyInet IPV4.
	FamillyInet = "inet"
	// FamillyInet6 IPV6.
	FamillyInet6 = "inet6"

	// DefaultMaxElem Default OptionMaxElem value.
	DefaultMaxElem = "65536"
	// DefaultHasSize Defaul OptionHashSize value.
	DefaultHasSize = "1024"

	// TypeHashIP The hash:ip set type uses a hash to store IP host addresses (default) or network addresses. Zero
	// valued IP address cannot be stored in a hash:ip type of set.
	TypeHashIP = "hash:ip"
	// TypeHashMac The hash:mac set type uses a hash to store MAC addresses. Zero valued MAC addresses cannot be stored
	// in a hash:mac type of set.
	TypeHashMac = "hash:mac"
	// TypeHashNet The hash:net set type uses a hash to store different sized IP network addresses. Network address with
	// zero prefix size cannot be stored in this type of sets.
	TypeHashNet = "hash:net"
	// TypeHashNetNet The hash:net,net set type uses a hash to store pairs of different sized IP network addresses. Bear
	// in mind that the first parameter has precedence over the second, so a nomatch entry could be potentially be
	// ineffective if a more specific first parameter existed with a suitable second parameter. Network address with
	// zero prefix size cannot be stored in this type of set.
	TypeHashNetNet = "hash:net,net"
	// TypeHashIPPort The hash:ip,port set type uses a hash to store IP address and port number pairs. The port number
	// is interpreted together with a protocol (default TCP) and zero protocol number cannot be used.
	TypeHashIPPort = "hash:ip,port"
	// TypeHashNetPort The hash:net,port set type uses a hash to store different sized IP network address and port
	// pairs. The port number is interpreted together with a protocol (default TCP) and zero protocol number cannot be
	// used. Network address with zero prefix size is not accepted either.
	TypeHashNetPort = "hash:net,port"
	// TypeHashIPPortIP The hash:ip,port,ip set type uses a hash to store IP address, port number and a second IP
	// address triples. The port number is interpreted together with a protocol (default TCP) and zero protocol number
	// cannot be used.
	TypeHashIPPortIP = "hash:ip,port,ip"
	// TypeHashIPPortNet The hash:ip,port,net set type uses a hash to store IP address, port number and IP network
	// address triples. The port number is interpreted together with a protocol (default TCP) and zero protocol number
	// cannot be used. Network address with zero prefix size cannot be stored either.
	TypeHashIPPortNet = "hash:ip,port,net"
	// TypeHashIPMark The hash:ip,mark set type uses a hash to store IP address and packet mark pairs.
	TypeHashIPMark = "hash:ip,mark"
	// TypeHashIPNetPortNet The hash:net,port,net set type behaves similarly to hash:ip,port,net but accepts a cidr
	// value for both the first and last parameter. Either subnet is permitted to be a /0 should you wish to match port
	// between all destinations.
	TypeHashIPNetPortNet = "hash:net,port,net"
	// TypeHashNetIface The hash:net,iface set type uses a hash to store different sized IP network address and
	// interface name pairs.
	TypeHashNetIface = "hash:net,iface"
	// TypeListSet The list:set type uses a simple list in which you can store set names.
	TypeListSet = "list:set"

	// OptionTimeout All set types supports the optional timeout parameter when creating a set and adding entries. The
	// value of the timeout parameter for the create command means the default timeout value (in seconds) for new
	// entries. If a set is created with timeout support, then the same timeout option can be used to specify
	// non-default timeout values when adding entries. Zero timeout value means the entry is added permanent to the
	// set. The timeout value of already added elements can be changed by readding the element using the -exist option.
	// When listing the set, the number of entries printed in the header might be larger than the listed number of
	// entries for sets with the timeout extensions: the number of entries in the set is updated when elements
	// added/deleted to the set and periodically when the garbage colletor evicts the timed out entries.
	OptionTimeout = "timeout"
	// OptionCounters All set types support the optional counters option when creating a set. If the option is specified
	// then the set is created with packet and byte counters per element support. The packet and byte counters are
	// initialized to zero when the elements are (re-)added to the set, unless the packet and byte counter values are
	// explicitly specified by the packets and bytes options. An example when an element is added to a set with non-zero
	// counter values.
	OptionCounters = "counters"
	// OptionPackets All set types support the optional counters option when creating a set. If the option is specified
	// then the set is created with packet and byte counters per element support. The packet and byte counters are
	// initialized to zero when the elements are (re-)added to the set, unless the packet and byte counter values are
	// explicitly specified by the packets and bytes options. An example when an element is added to a set with non-zero
	// counter values.
	OptionPackets = "packets"
	// OptionBytes All set types support the optional counters option when creating a set. If the option is specified
	// then the set is created with packet and byte counters per element support. The packet and byte counters are
	// initialized to zero when the elements are (re-)added to the set, unless the packet and byte counter values are
	// explicitly specified by the packets and bytes options. An example when an element is added to a set with non-zero
	// counter values.
	OptionBytes = "bytes"
	// OptionComment All set types support the optional comment extension. Enabling this extension on an ipset enables
	// you to annotate an ipset entry with an arbitrary string. This string is completely ignored by both the kernel and
	// ipset itself and is purely for providing a convenient means to document the reason for an entry's existence.
	// Comments must not contain any quotation marks and the usual escape character (\) has no meaning.
	OptionComment = "comment"
	// OptionSkbinfo All set types support the optional skbinfo extension. This extension allow to store the metainfo
	// (firewall mark, tc class and hardware queue) with every entry and map it to packets by usage of SET netfilter
	// target with --map-set option. skbmark option format: MARK or MARK/MASK, where MARK and MASK are 32bit hex numbers
	// with 0x prefix. If only mark is specified mask 0xffffffff are used. skbprio option has tc class format:
	// MAJOR:MINOR, where major and minor numbers are hex without 0x prefix. skbqueue option is just decimal number.
	OptionSkbinfo = "skbinfo"
	// OptionSkbmark All set types support the optional skbinfo extension. This extension allow to store the metainfo
	// (firewall mark, tc class and hardware queue) with every entry and map it to packets by usage of SET netfilter
	// target with --map-set option. skbmark option format: MARK or MARK/MASK, where MARK and MASK are 32bit hex numbers
	// with 0x prefix. If only mark is specified mask 0xffffffff are used. skbprio option has tc class format:
	//MAJOR:MINOR, where major and minor numbers are hex without 0x prefix. skbqueue option is just decimal number.
	OptionSkbmark = "skbmark"
	// OptionSkbprio All set types support the optional skbinfo extension. This extension allow to store the metainfo
	// (firewall mark, tc class and hardware queue) with every entry and map it to packets by usage of SET netfilter
	// target with --map-set option. skbmark option format: MARK or MARK/MASK, where MARK and MASK are 32bit hex numbers
	// with 0x prefix. If only mark is specified mask 0xffffffff are used. skbprio option has tc class format:
	// MAJOR:MINOR, where major and minor numbers are hex without 0x prefix. skbqueue option is just decimal number.
	OptionSkbprio = "skbprio"
	// OptionSkbqueue All set types support the optional skbinfo extension. This extension allow to store the metainfo
	// (firewall mark, tc class and hardware queue) with every entry and map it to packets by usage of SET netfilter
	// target with --map-set option. skbmark option format: MARK or MARK/MASK, where MARK and MASK are 32bit hex numbers
	// with 0x prefix. If only mark is specified mask 0xffffffff are used. skbprio option has tc class format:
	// MAJOR:MINOR, where major and minor numbers are hex without 0x prefix. skbqueue option is just decimal number.
	OptionSkbqueue = "skbqueue"
	// OptionHashSize This parameter is valid for the create command of all hash type sets. It defines the initial hash
	// size for the set, default is 1024. The hash size must be a power of two, the kernel automatically rounds up non
	// power of two hash sizes to the first correct value.
	OptionHashSize = "hashsize"
	// OptionMaxElem This parameter is valid for the create command of all hash type sets. It does define the maximal
	// number of elements which can be stored in the set, default 65536.
	OptionMaxElem = "maxelem"
	// OptionFamilly This parameter is valid for the create command of all hash type sets except for hash:mac. It
	// defines the protocol family of the IP addresses to be stored in the set. The default is inet, i.e IPv4.
	OptionFamilly = "family"
	// OptionNoMatch The hash set types which can store net type of data (i.e. hash:*net*) support the optional nomatch
	// option when adding entries. When matching elements in the set, entries marked as nomatch are skipped as if those
	// were not added to the set, which makes possible to build up sets with exceptions. See the example at hash type
	// hash:net below. When elements are tested by ipset, the nomatch flags are taken into account. If one wants to test
	// the existence of an element marked with nomatch in a set, then the flag must be specified too.
	OptionNoMatch = "nomatch"
	// OptionForceAdd All hash set types support the optional forceadd parameter when creating a set. When sets created
	// with this option become full the next addition to the set may succeed and evict a random entry from the set.
	OptionForceAdd = "forceadd"

	// IPv6SetPrefix is the prefix that ipset requires on IPv6 ipsets in order to distinguish them from IPv4 sets
	IPv6SetPrefix = "inet6"
)
View Source 
const (
	// From what I can see there are no IPv6 equivalents for the below options, so we only consider IPv6 here
	// Network Services Configuration Paths
	IPv4IPVSConntrack        = "net/ipv4/vs/conntrack"
	IPv4IPVSExpireNodestConn = "net/ipv4/vs/expire_nodest_conn"
	IPv4IPVSExpireQuiescent  = "net/ipv4/vs/expire_quiescent_template"
	IPv4IPVSConnReuseMode    = "net/ipv4/vs/conn_reuse_mode"
	IPv4ConfAllArpIgnore     = "net/ipv4/conf/all/arp_ignore"
	IPv4ConfAllArpAnnounce   = "net/ipv4/conf/all/arp_announce"

	// Network Routes Configuration Paths
	BridgeNFCallIPTables  = "net/bridge/bridge-nf-call-iptables"
	BridgeNFCallIP6Tables = "net/bridge/bridge-nf-call-ip6tables"

	// Template Configuration Paths
	IPv4ConfRPFilterTemplate = "net/ipv4/conf/%s/rp_filter"
)
View Source 
const (
	IPInIPHeaderLength = 20
)

Variables

This section is empty.

Functions

func Append 

func Append(buffer *bytes.Buffer, chain string, rule []string)

Append appends rule to chain at the end of buffer

func AppendUnique 

func AppendUnique(buffer *bytes.Buffer, chain string, rule []string)

AppendUnique ensures that rule is in chain only once in the buffer and that the occurrence is at the end of the buffer

func CloseCloserDisregardError 

func CloseCloserDisregardError(handler io.Closer)

CloseCloserDisregardError it is a common need throughout kube-router's code base to need close a closer in defer statements, this allows an action like that to pass a linter as well as describe its intention well

func ClusterIPIsNone 

func ClusterIPIsNone(clusterIP string) bool

ClusterIPIsNone checks to see whether the ClusterIP contains "None" which would indicate that it is headless

func ClusterIPIsNoneOrBlank 

func ClusterIPIsNoneOrBlank(clusterIP string) bool

ClusterIPIsNoneOrBlank checks to see whether the ClusterIP contains "None" or is blank

func ContainsIPv4Address 

func ContainsIPv4Address(addrs []string) bool

ContainsIPv4Address checks a given string array to see if it contains a valid IPv4 address within it

func ContainsIPv6Address 

func ContainsIPv6Address(addrs []string) bool

ContainsIPv6Address checks a given string array to see if it contains a valid IPv6 address within it

func FindBestIPv4NodeAddress 

func FindBestIPv4NodeAddress(priIP net.IP, intExtIPv4Addresses map[apiv1.NodeAddressType][]net.IP) net.IP

func FindBestIPv6NodeAddress 

func FindBestIPv6NodeAddress(priIP net.IP, intExtIPv6Addresses map[apiv1.NodeAddressType][]net.IP) net.IP

func GetAllNodeIPs 

func GetAllNodeIPs(node *apiv1.Node) (map[apiv1.NodeAddressType][]net.IP, map[apiv1.NodeAddressType][]net.IP)

GetAllNodeIPs returns all internal and external IP addresses grouped as IPv4 and IPv6

func GetMTUFromNodeIP 

func GetMTUFromNodeIP(nodeIP net.IP) (int, error)

GetMTUFromNodeIP returns the MTU by detecting it from the IP on the node and figuring in tunneling configurations

func GetNodeObject 

func GetNodeObject(clientset kubernetes.Interface, hostnameOverride string) (*apiv1.Node, error)

GetNodeObject returns the node API object for the node

func GetPodCIDRsFromNodeSpecDualStack 

func GetPodCIDRsFromNodeSpecDualStack(node *v1core.Node) ([]string, []string, error)

GetPodCIDRsFromNodeSpecDualStack reads the IPv4 and IPv6 pod CIDR allocated to the node from API node object and returns them

func GetPodCidrFromNodeSpec 

func GetPodCidrFromNodeSpec(node *v1core.Node) (string, error)

GetPodCidrFromNodeSpec reads the pod CIDR allocated to the node from API node object and returns it

func GetPrimaryNodeIP 

func GetPrimaryNodeIP(node *apiv1.Node) (net.IP, error)

GetPrimaryNodeIP returns the most valid external facing IP address for a node. Order of preference: 1. NodeInternalIP 2. NodeExternalIP (Only set on cloud providers usually)

func IPSetName added in v2.1.1 

func IPSetName(setName string, isIPv6 bool) string

IPSetName returns the proper set name for this component based upon whether or not it is an IPv6 set

func NewCNINetworkConfig 

func NewCNINetworkConfig(cniConfFilePath string) (*cniNetworkConfig, error)

func PartialJSONMarshal 

func PartialJSONMarshal(r rawMapAble) ([]byte, error)

PartialJSONMarshal allows a struct that implements the rawMapAble interface to be fully restored without having to know about every possible field that may exist within the JSON. This is the reverse process of PartialJSONUnmarshal().

func PartialJSONUnmarshal 

func PartialJSONUnmarshal(r rawMapAble, bytes []byte) error

PartialJSONUnmarshal allows a struct that implements the rawMapAble interface to be partially unmarshaled. This means that via this function we are able to parse and understand the fields that we know about and have defined in the struct without knowing every possible field. This still stores the unknown fields and they can be retrieved via the getRaw() function and restored properly via the PartialJSONMarshal() function.

func RouteTableAdd added in v2.1.1 

func RouteTableAdd(tableNumber, tableName string) error

RouteTableAdd adds a new named table to iproute's rt_tables configuration file

func SaveInto 

func SaveInto(iptablesBinary, table string, buffer *bytes.Buffer) error

SaveInto calls `iptables-save` for given table and stores result in a given buffer.

func ServiceForEndpointSlice 

func ServiceForEndpointSlice(ci *cache.Indexer, es *discovery.EndpointSlice) (interface{}, bool, error)

ServiceForEndpoints given EndpointSlice object return Service API object if it exists

func ServiceForEndpoints 

func ServiceForEndpoints(ci *cache.Indexer, ep *v1core.Endpoints) (interface{}, bool, error)

ServiceForEndpoints given Endpoint object return Service API object if it exists

func ServiceHasNoClusterIP added in v2.1.0 

func ServiceHasNoClusterIP(obj interface{}) bool

ServiceHasNoClusterIP decides whether or not the this service is a headless service which is often useful to kube-router as there is no need to execute logic on most headless changes. Function takes a generic interface as its input parameter so that it can be used more easily in early processing if needed. If a non-service object is given, function will return false.

func ServiceNameforEndpointSlice 

func ServiceNameforEndpointSlice(es *discovery.EndpointSlice) (string, error)

ServiceNameforEndpointSlice returns the name of the service that created the EndpointSlice for a given EndpointSlice

With endpoints, the name of the endpoint object always matches the service object, however when it comes to EndpointSlices, things work a bit different as k8s' controller will autogenerated it (something like: foo-kl29b)

We can get service information from a number of spots: * From the ownerReferences in the metadata EndpointSlice -> metadata -> ownerReferences[0] -> name * We can also get this from the label: kubernetes.io/service-name * generateName will also contain the prefix for the autogenerated name which should align with our service name

We'll all through all of these and do our best to identify the service's name, if we aren't able to find any of these or they disagree with each other we'll throw an error

func SliceContainsString 

func SliceContainsString(needle string, haystack []string) bool

SliceContainsString checks to see if needle is contained within haystack, returns true if found, otherwise returns false

func TCPAddressBindable added in v2.1.0 

func TCPAddressBindable(addr string, port uint16) error

TCPAddressBindable checks to see if an IP/port is bindable by attempting to open a listener then closing it returns nil if successful

Types

type Broadcaster 

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

Broadcaster holds the details of registered listeners

func (*Broadcaster) Add 

func (b *Broadcaster) Add(listener Listener)

Add lets to register a listener

func (*Broadcaster) Notify 

func (b *Broadcaster) Notify(instance interface{})

Notify notifies an update to registered listeners

type Conf 

type Conf struct {
	Bridge string
	IPAM   *IPAM
	MTU    float64
	Type   string
	// contains filtered or unexported fields
}

Conf represents the individual CNI configuration that may exist on its own, or be part of a ConfList

func (*Conf) MarshalJSON 

func (c *Conf) MarshalJSON() ([]byte, error)

func (*Conf) UnmarshalJSON 

func (c *Conf) UnmarshalJSON(bytes []byte) error

type ConfList 

type ConfList struct {
	Plugins []*Conf
	// contains filtered or unexported fields
}

ConfList represents a list of CNI configurations

func (*ConfList) MarshalJSON 

func (c *ConfList) MarshalJSON() ([]byte, error)

func (*ConfList) UnmarshalJSON 

func (c *ConfList) UnmarshalJSON(bytes []byte) error

type Entry 

type Entry struct {
	Set     *Set
	Options []string
}

Entry of ipset Set.

type IPAM 

type IPAM struct {
	Subnet string
	Ranges [][]*Range
	// contains filtered or unexported fields
}

IPAM represents the ipam specific configuration that may exist on a given CNI configuration / plugin

func (*IPAM) MarshalJSON 

func (i *IPAM) MarshalJSON() ([]byte, error)

func (*IPAM) UnmarshalJSON 

func (i *IPAM) UnmarshalJSON(bytes []byte) error

type IPSet 

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

IPSet represent ipset sets managed by.

func NewIPSet 

func NewIPSet(isIpv6 bool) (*IPSet, error)

NewIPSet create a new IPSet with ipSetPath initialized.

func (*IPSet) Add 

func (ipset *IPSet) Add(set *Set) error

Add a given Set to an IPSet

func (*IPSet) Create 

func (ipset *IPSet) Create(setName string, createOptions ...string) (*Set, error)

Create a set identified with setname and specified type. The type may require type specific options. Does not create set on the system if it already exists by the same name.

func (*IPSet) Destroy 

func (ipset *IPSet) Destroy(setName string) error

Destroy the specified set by name. If the set has got reference(s), nothing is done and no set destroyed. If the IPSet does not contain the named set then Destroy is a no-op.

func (*IPSet) DestroyAllWithin 

func (ipset *IPSet) DestroyAllWithin() error

DestroyAllWithin destroys all sets contained within the IPSet's Sets.

func (*IPSet) Flush 

func (ipset *IPSet) Flush() error

Flush all entries from all sets

func (*IPSet) Get 

func (ipset *IPSet) Get(setName string) *Set

Get Set by Name.

func (*IPSet) Name 

func (ipset *IPSet) Name(setName string) string

func (*IPSet) RefreshSet 

func (ipset *IPSet) RefreshSet(setName string, entriesWithOptions [][]string, setType string)

RefreshSet add/update internal Sets with a Set of entries but does not run restore command

func (*IPSet) Restore 

func (ipset *IPSet) Restore() error

Restore a saved session generated by save. The saved session can be fed from stdin or the option -file can be used to specify a filename instead of stdin. Please note, existing sets and elements are not erased by restore unless specified so in the restore file. All commands are allowed in restore mode except list, help, version, interactive mode and restore itself. Send formatted ipset.sets into stdin of "ipset restore" command.

func (*IPSet) Save 

func (ipset *IPSet) Save() error

Save the given set, or all sets if none is given to stdout in a format that restore can read. The option -file can be used to specify a filename instead of stdout. save "ipset save" command output to ipset.sets.

func (*IPSet) Sets 

func (ipset *IPSet) Sets() map[string]*Set

Sets returns all sets from ipset

type IPSetHandler 

type IPSetHandler interface {
	Create(setName string, createOptions ...string) (*Set, error)
	Add(set *Set) error
	RefreshSet(setName string, entriesWithOptions [][]string, setType string)
	Destroy(setName string) error
	DestroyAllWithin() error
	Save() error
	Restore() error
	Flush() error
	Get(setName string) *Set
	Sets() map[string]*Set
	Name(ipSet string) string
}

type IPTablesHandler 

type IPTablesHandler interface {
	Proto() iptables.Protocol
	Exists(table, chain string, rulespec ...string) (bool, error)
	Insert(table, chain string, pos int, rulespec ...string) error
	Append(table, chain string, rulespec ...string) error
	AppendUnique(table, chain string, rulespec ...string) error
	Delete(table, chain string, rulespec ...string) error
	DeleteIfExists(table, chain string, rulespec ...string) error
	List(table, chain string) ([]string, error)
	ListWithCounters(table, chain string) ([]string, error)
	ListChains(table string) ([]string, error)
	ChainExists(table, chain string) (bool, error)
	Stats(table, chain string) ([][]string, error)
	ParseStat(stat []string) (iptables.Stat, error)
	StructuredStats(table, chain string) ([]iptables.Stat, error)
	NewChain(table, chain string) error
	ClearChain(table, chain string) error
	RenameChain(table, oldChain, newChain string) error
	DeleteChain(table, chain string) error
	ClearAndDeleteChain(table, chain string) error
	ClearAll() error
	DeleteAll() error
	ChangePolicy(table, chain, target string) error
	HasRandomFully() bool
	GetIptablesVersion() (int, int, int)
}

IPTablesHandler interface based on the IPTables struct from github.com/coreos/go-iptables which allows to mock it.

type IPTablesSaveRestore 

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

IPTablesSaveRestore struct stores shell commands to save and restore iptables state

func NewIPTablesSaveRestore 

func NewIPTablesSaveRestore(ipFamily v1core.IPFamily) *IPTablesSaveRestore

NewIPTablesSaveRestore returns an IPTablesSaveRestore with apparopriate commands based on ipFamily (IPv4 or IPv6)

func (*IPTablesSaveRestore) Restore 

func (i *IPTablesSaveRestore) Restore(table string, data []byte) error

Restore updates table with the content of data

func (*IPTablesSaveRestore) SaveInto 

func (i *IPTablesSaveRestore) SaveInto(table string, buffer *bytes.Buffer) error

SaveInto saves the content of iptables table into buffer

type IPTablesSaveRestorer 

type IPTablesSaveRestorer interface {
	SaveInto(table string, buffer *bytes.Buffer) error
	Restore(table string, data []byte) error
}

IPTablesSaveRestorer interface that defines functions to save and restore tables

type Listener 

type Listener interface {
	OnUpdate(instance interface{})
}

type ListenerFunc 

type ListenerFunc func(instance interface{})

func (ListenerFunc) OnUpdate 

func (f ListenerFunc) OnUpdate(instance interface{})

type Range 

type Range struct {
	Subnet string
	// contains filtered or unexported fields
}

Range represents an IP range that may exist within a range set (hence the double array above)

func (*Range) MarshalJSON 

func (r *Range) MarshalJSON() ([]byte, error)

func (*Range) UnmarshalJSON 

func (r *Range) UnmarshalJSON(bytes []byte) error

type Set 

type Set struct {
	Parent  *IPSet
	Name    string
	Entries []*Entry
	Options []string
}

Set represent a ipset set entry.

func (*Set) BatchAdd 

func (set *Set) BatchAdd(addOptions [][]string) error

BatchAdd given entries (with their options) to the set. For multiple items, this is much faster than Add().

func (*Set) Destroy 

func (set *Set) Destroy() error

Destroy the specified set or all the sets if none is given. If the set has got reference(s), nothing is done and no set destroyed.

func (*Set) HasPrefix added in v2.1.2 

func (set *Set) HasPrefix(prefix string) bool

func (*Set) IsActive 

func (set *Set) IsActive() (bool, error)

IsActive checks if a set exists on the system with the same name.

type SysctlError 

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

func SetSysctl 

func SetSysctl(path string, value int) *SysctlError

SetSysctl sets a sysctl value

func SetSysctlSingleTemplate 

func SetSysctlSingleTemplate(pathTemplate string, substitute string, value int) *SysctlError

SetSysctlSingleTemplate sets a sysctl value by first formatting the PathTemplate parameter with the substitute string and then setting the sysctl to the value parameter

func (*SysctlError) Error 

func (e *SysctlError) Error() string

Error return the error as string

func (*SysctlError) IsFatal 

func (e *SysctlError) IsFatal() bool

IsFatal was the error fatal and reason to exit kube-router

func (*SysctlError) Unwrap 

func (e *SysctlError) Unwrap() error

Unwrap allows us to unwrap an error showing the original error

Source Files

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