policy

package
v10.43.0+incompatible Latest Latest
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 Go to latest Published: Sep 5, 2018 License: Apache-2.0 Imports: 8 Imported by: 25

Documentation

Overview

Package policy describes a generic interface for retrieving policies. Different implementations are possible for environments such as Kubernetes, Mesos or other custom environments. An implementation has to provide a method for retrieving policy based on the metadata associated with the container and deleting the policy when the container dies. It is up to the implementation to decide how to generate the policy. The package also defines the basic data structure for communicating policy information. The implementations are responsible for providing all the necessary data.

Index

Constants

View Source 
const (
	// AllowAll allows everything for the specific PU.
	AllowAll = 0x1
	// Police filters on the PU based on the PolicyRules.
	Police = 0x2
)
View Source 
const (
	// Equal is the equal operator
	Equal = "="
	// NotEqual is the not equal operator
	NotEqual = "=!"
	// KeyExists is the key=* operator
	KeyExists = "*"
	// KeyNotExists means that the key doesnt exist in the incoming tags
	KeyNotExists = "!*"
)
View Source 
const (
	// DefaultNamespace is the default namespace for applying policy
	DefaultNamespace = "bridge"
)

Variables

This section is empty.

Functions

func DefaultLogPrefix 

func DefaultLogPrefix(contextID string) string

DefaultLogPrefix return the prefix used in nf-log action for default rule.

func EncodedStringToAction 

func EncodedStringToAction(e string) (ActionType, ObserveActionType, error)

EncodedStringToAction returns action and observed action from encoded string.

Types

type ActionType added in v1.0.24 

type ActionType byte

ActionType is the action that can be applied to a flow. 

const (
	// Accept is the accept action
	Accept ActionType = 0x1
	// Reject is the reject  action
	Reject ActionType = 0x2
	// Encrypt instructs data to be encrypted
	Encrypt ActionType = 0x4
	// Log instructs the datapath to log the IP addresses
	Log ActionType = 0x8
	// Observe instructs the datapath to observe policy results
	Observe ActionType = 0x10
)

func (ActionType) Accepted added in v1.0.24 

func (f ActionType) Accepted() bool

Accepted returns if the action mask contains the Accepted mask.

func (ActionType) ActionString added in v1.0.24 

func (f ActionType) ActionString() string

ActionString returns if the action if accepted of rejected as a long string.

func (ActionType) Encrypted added in v1.0.24 

func (f ActionType) Encrypted() bool

Encrypted returns if the action mask contains the Encrypted mask.

func (ActionType) Logged added in v1.0.24 

func (f ActionType) Logged() bool

Logged returns if the action mask contains the Logged mask.

func (ActionType) Observed 

func (f ActionType) Observed() bool

Observed returns if the action mask contains the Observed mask.

func (ActionType) Rejected added in v1.0.24 

func (f ActionType) Rejected() bool

Rejected returns if the action mask contains the Rejected mask.

func (ActionType) String added in v1.0.24 

func (f ActionType) String() string

type ApplicationService 

type ApplicationService struct {
	// ID is the id of the service
	ID string

	// NetworkInfo provides the network information (addresses/ports) of the service.
	// This is the public facing network information, or how the service can be
	// accessed. In the case of Load Balancers for example, this would be the
	// IP/port of the load balancer.
	NetworkInfo *common.Service

	// PrivateNetworkInfo captures the network service definition of an application
	// as seen by the application. For example the port that the application is
	// listening to. This is needed in the case of port mappings.
	PrivateNetworkInfo *common.Service

	// Type is the type of the service.
	Type ServiceType

	// HTTPRules are only valid for HTTP Services and capture the list of APIs
	// exposed by the service.
	HTTPRules []*HTTPRule

	// Tags are the tags of the service.
	Tags *TagStore

	// JWTTokenHandler is the token handler for validating user JWT tokens.
	JWTTokenHandler usertokens.Verifier

	// JWTClaimMappings is a map of mappings between JWT claims arriving in
	// a user request and outgoing HTTP headers towards an application. It
	// is used to allow operators to map claims to HTTP headers that downstream
	// applications can understand.
	JWTClaimMappings map[string]string

	// External indicates if this is an external service. For external services
	// access control is implemented at the ingress.
	External bool

	// CACert is the certificate of the CA of external services. This allows TLS to
	// work with external services that use private CAs.
	CACert []byte
}

ApplicationService is the type of service that this PU exposes.

type ApplicationServicesList 

type ApplicationServicesList []*ApplicationService

ApplicationServicesList is a list of ApplicationServices.

type DNSRule 

type DNSRule struct {
	Name     string
	Port     string
	Protocol string
}

DNSRule holds the dns names and the assicated ports

type DNSRuleList 

type DNSRuleList []DNSRule

DNSRuleList is a list of DNS rules

func (DNSRuleList) Copy 

func (l DNSRuleList) Copy() DNSRuleList

Copy creates a clone of DNS rule list

type ExtendedMap added in v1.0.10 

type ExtendedMap map[string]string

ExtendedMap is a common map with additional functions

func (ExtendedMap) Copy added in v1.0.10 

func (s ExtendedMap) Copy() ExtendedMap

Copy copies an ExtendedMap

func (ExtendedMap) Get added in v1.0.10 

func (s ExtendedMap) Get(key string) (string, bool)

Get does a lookup in the map

type FlowPolicy added in v1.0.24 

type FlowPolicy struct {
	ObserveAction ObserveActionType
	Action        ActionType
	ServiceID     string
	PolicyID      string
	Labels        []string
}

FlowPolicy captures the policy for a particular flow

func (*FlowPolicy) EncodedActionString 

func (f *FlowPolicy) EncodedActionString() string

EncodedActionString is used to encode observed action as well as action

func (*FlowPolicy) LogPrefix 

func (f *FlowPolicy) LogPrefix(contextID string) string

LogPrefix is the prefix used in nf-log action. It must be less than

type HTTPRule 

type HTTPRule struct {
	// URIs is a list of regular expressions that describe the URIs that
	// a service is exposing.
	URIs []string

	// Methods is a list of the allowed verbs for the given list of URIs.
	Methods []string

	// Scopes is a list of scopes associated with this rule. Clients
	// must present one of these scopes in order to get access to this
	// API. The scopes are presented either in the Trireme identity or the
	// JWT of HTTP Authorization header.
	Scopes []string

	// Public indicates that this is a public API and anyone can access it.
	// No authorization will be performed on public APIs.
	Public bool
}

HTTPRule holds a rule for a particular HTTPService. The rule relates a set of URIs defined as regular expressions with associated verbs. The * VERB indicates all actions.

type IPRule 

type IPRule struct {
	Address  string
	Port     string
	Protocol string
	Policy   *FlowPolicy
}

IPRule holds IP rules to external services

type IPRuleList 

type IPRuleList []IPRule

IPRuleList is a list of IP rules

func (IPRuleList) Copy added in v1.0.10 

func (l IPRuleList) Copy() IPRuleList

Copy creates a clone of the IP rule list

type KeyValueOperator 

type KeyValueOperator struct {
	Key      string
	Value    []string
	Operator Operator
	ID       string
}

KeyValueOperator describes an individual matching rule

type ObserveActionType 

type ObserveActionType byte

ObserveActionType is the action that can be applied to a flow for an observation rule. 

const (
	// ObserveNone specifies if any observation was made or not.
	ObserveNone ObserveActionType = 0x0
	// ObserveContinue is used to not take any action on packet and is deferred to
	// an actual rule with accept or deny action.
	ObserveContinue ObserveActionType = 0x1
	// ObserveApply is used to apply action to packets hitting this rule.
	ObserveApply ObserveActionType = 0x2
)

Observe actions are used in conjunction with action.

func (ObserveActionType) ObserveApply 

func (f ObserveActionType) ObserveApply() bool

ObserveApply returns if the action of observation rule is allow.

func (ObserveActionType) ObserveContinue 

func (f ObserveActionType) ObserveContinue() bool

ObserveContinue returns if the action of observation rule is continue.

func (ObserveActionType) Observed 

func (f ObserveActionType) Observed() bool

Observed returns true if any observed action was found.

func (ObserveActionType) String 

func (f ObserveActionType) String() string

type Operator 

type Operator string

Operator defines the operation between your key and value.

type OptionsType added in v1.0.63 

type OptionsType struct {
	// CgroupName is the name of the cgroup
	CgroupName string

	// CgroupMark is the tag of the cgroup
	CgroupMark string

	// UserID is the user ID if it exists
	UserID string

	// Services is the list of services of interest
	Services []common.Service

	// ProxyPort is the port on which the proxy listens
	ProxyPort string

	// PolicyExtensions is policy resolution extensions
	PolicyExtensions interface{}

	// PortMap maps container port -> host ports.
	PortMap map[nat.Port][]string
}

OptionsType is a set of options that can be passed with a policy request

type PUAction 

type PUAction int

PUAction defines the action types that applies for a specific PU as a whole.

type PUInfo 

type PUInfo struct {
	// ContextID is the ID of the container that the policy applies to
	ContextID string
	// Policy is an instantiation of the container policy
	Policy *PUPolicy
	// RunTime captures all data that are captured from the container
	Runtime *PURuntime
}

PUInfo captures all policy information related to a connection as well as runtime. It makes passing data around simpler.

func NewPUInfo 

func NewPUInfo(contextID string, puType common.PUType) *PUInfo

NewPUInfo instantiates a new ContainerPolicy

func PUInfoFromPolicyAndRuntime 

func PUInfoFromPolicyAndRuntime(contextID string, policyInfo *PUPolicy, runtimeInfo *PURuntime) *PUInfo

PUInfoFromPolicyAndRuntime generates a ContainerInfo Struct from an existing RuntimeInfo and PolicyInfo

type PUPolicy 

type PUPolicy struct {

	// dnsACLs is the list of DNS names and the associated ports that the container is
	// allowed to talk to outside the data center
	DNSACLs DNSRuleList

	sync.Mutex
	// contains filtered or unexported fields
}

PUPolicy captures all policy information related ot the container

func NewPUPolicy 

func NewPUPolicy(
	id string,
	action PUAction,
	appACLs IPRuleList,
	netACLs IPRuleList,
	dnsACLs DNSRuleList,
	txtags TagSelectorList,
	rxtags TagSelectorList,
	identity *TagStore,
	annotations *TagStore,
	ips ExtendedMap,
	triremeNetworks []string,
	triremeUDPNetworks []string,
	excludedNetworks []string,
	exposedServices ApplicationServicesList,
	dependentServices ApplicationServicesList,
	scopes []string,
) *PUPolicy

NewPUPolicy generates a new ContainerPolicyInfo appACLs are the ACLs for packet coming from the Application/PU to the Network. netACLs are the ACLs for packet coming from the Network to the Application/PU.

func NewPUPolicyWithDefaults 

func NewPUPolicyWithDefaults() *PUPolicy

NewPUPolicyWithDefaults sets up a PU policy with defaults

func (*PUPolicy) AddIdentityTag 

func (p *PUPolicy) AddIdentityTag(k, v string)

AddIdentityTag adds a policy tag

func (*PUPolicy) AddReceiverRules 

func (p *PUPolicy) AddReceiverRules(t TagSelector)

AddReceiverRules adds a receiver rule

func (*PUPolicy) AddTransmitterRules 

func (p *PUPolicy) AddTransmitterRules(t TagSelector)

AddTransmitterRules adds a transmitter rule

func (*PUPolicy) Annotations 

func (p *PUPolicy) Annotations() *TagStore

Annotations returns a copy of the annotations

func (*PUPolicy) ApplicationACLs 

func (p *PUPolicy) ApplicationACLs() IPRuleList

ApplicationACLs returns a copy of IPRuleList

func (*PUPolicy) Clone 

func (p *PUPolicy) Clone() *PUPolicy

Clone returns a copy of the policy

func (*PUPolicy) DNSNameACLs 

func (p *PUPolicy) DNSNameACLs() DNSRuleList

DNSNameACLs returns a copy of DNSRuleList

func (*PUPolicy) DependentServices 

func (p *PUPolicy) DependentServices() ApplicationServicesList

DependentServices returns the external services.

func (*PUPolicy) ExcludedNetworks 

func (p *PUPolicy) ExcludedNetworks() []string

ExcludedNetworks returns the list of excluded networks.

func (*PUPolicy) ExposedServices 

func (p *PUPolicy) ExposedServices() ApplicationServicesList

ExposedServices returns the exposed services

func (*PUPolicy) IPAddresses 

func (p *PUPolicy) IPAddresses() ExtendedMap

IPAddresses returns all the IP addresses for the processing unit

func (*PUPolicy) Identity 

func (p *PUPolicy) Identity() *TagStore

Identity returns a copy of the Identity

func (*PUPolicy) ManagementID 

func (p *PUPolicy) ManagementID() string

ManagementID returns the management ID

func (*PUPolicy) NetworkACLs 

func (p *PUPolicy) NetworkACLs() IPRuleList

NetworkACLs returns a copy of IPRuleList

func (*PUPolicy) ReceiverRules 

func (p *PUPolicy) ReceiverRules() TagSelectorList

ReceiverRules returns a copy of TagSelectorList

func (*PUPolicy) Scopes 

func (p *PUPolicy) Scopes() []string

Scopes returns the scopes of the policy.

func (*PUPolicy) ServiceCertificates 

func (p *PUPolicy) ServiceCertificates() (string, string, string)

ServiceCertificates returns the service certificate.

func (*PUPolicy) SetIPAddresses 

func (p *PUPolicy) SetIPAddresses(l ExtendedMap)

SetIPAddresses sets the IP addresses for the processing unit

func (*PUPolicy) SetTriremeAction added in v1.0.10 

func (p *PUPolicy) SetTriremeAction(action PUAction)

SetTriremeAction returns the TriremeAction

func (*PUPolicy) ToPublicPolicy 

func (p *PUPolicy) ToPublicPolicy() *PUPolicyPublic

ToPublicPolicy converts the object to a marshallable object.

func (*PUPolicy) TransmitterRules 

func (p *PUPolicy) TransmitterRules() TagSelectorList

TransmitterRules returns a copy of TagSelectorList

func (*PUPolicy) TriremeAction 

func (p *PUPolicy) TriremeAction() PUAction

TriremeAction returns the TriremeAction

func (*PUPolicy) TriremeNetworks 

func (p *PUPolicy) TriremeNetworks() []string

TriremeNetworks returns the list of networks that Trireme must be applied

func (*PUPolicy) UDPNetworks 

func (p *PUPolicy) UDPNetworks() []string

UDPNetworks returns the UDP networks

func (*PUPolicy) UpdateDNSNetworks 

func (p *PUPolicy) UpdateDNSNetworks(networks DNSRuleList)

UpdateDNSNetworks updates the set of FQDN names allowed by the policy

func (*PUPolicy) UpdateExcludedNetworks 

func (p *PUPolicy) UpdateExcludedNetworks(networks []string)

UpdateExcludedNetworks updates the list of excluded networks.

func (*PUPolicy) UpdateServiceCertificates 

func (p *PUPolicy) UpdateServiceCertificates(cert, key string)

UpdateServiceCertificates updates the certificate and private key of the policy

func (*PUPolicy) UpdateTriremeNetworks 

func (p *PUPolicy) UpdateTriremeNetworks(networks []string)

UpdateTriremeNetworks updates the set of networks for trireme

type PUPolicyPublic 

type PUPolicyPublic struct {
	ManagementID        string                  `json:"managementID,omitempty"`
	TriremeAction       PUAction                `json:"triremeAction,omitempty"`
	ApplicationACLs     IPRuleList              `json:"applicationACLs,omitempty"`
	NetworkACLs         IPRuleList              `json:"networkACLs,omitempty"`
	DNSACLs             DNSRuleList             `json:"dnsACLs,omitempty"`
	Identity            *TagStore               `json:"identity,omitempty"`
	Annotations         *TagStore               `json:"annotations,omitempty"`
	TransmitterRules    TagSelectorList         `json:"transmitterRules,omitempty"`
	ReceiverRules       TagSelectorList         `json:"receiverRules,omitempty"`
	IPs                 ExtendedMap             `json:"IPs,omitempty"`
	TriremeNetworks     []string                `json:"triremeNetworks,omitempty"`
	TriremeUDPNetworks  []string                `json:"triremeUDPNetworks,omitempty"`
	ExcludedNetworks    []string                `json:"excludedNetworks,omitempty"`
	ExposedServices     ApplicationServicesList `json:"exposedServices,omitempty"`
	DependentServices   ApplicationServicesList `json:"dependentServices,omitempty"`
	ServicesCertificate string                  `json:"servicesCertificate,omitempty"`
	ServicesPrivateKey  string                  `json:"servicesPrivateKey,omitempty"`
	ServicesCA          string                  `json:"servicesCA,omitempty"`
	Scopes              []string                `json:"scopes,omitempty"`
}

PUPolicyPublic captures all policy information related ot the processing unit in an object that can be marshalled and transmitted over the RPC interface.

func (*PUPolicyPublic) ToPrivatePolicy 

func (p *PUPolicyPublic) ToPrivatePolicy(convert bool) *PUPolicy

ToPrivatePolicy converts the object to a private object.

type PURuntime 

type PURuntime struct {
	sync.Mutex
	// contains filtered or unexported fields
}

PURuntime holds all data related to the status of the container run time

func NewPURuntime 

func NewPURuntime(name string, pid int, nsPath string, tags *TagStore, ips ExtendedMap, puType common.PUType, options *OptionsType) *PURuntime

NewPURuntime Generate a new RuntimeInfo

func NewPURuntimeWithDefaults 

func NewPURuntimeWithDefaults() *PURuntime

NewPURuntimeWithDefaults sets up PURuntime with defaults

func (*PURuntime) Clone 

func (r *PURuntime) Clone() *PURuntime

Clone returns a copy of the policy

func (*PURuntime) IPAddresses 

func (r *PURuntime) IPAddresses() ExtendedMap

IPAddresses returns all the IP addresses for the processing unit

func (*PURuntime) MarshalJSON 

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

MarshalJSON Marshals this struct.

func (*PURuntime) NSPath added in v1.0.46 

func (r *PURuntime) NSPath() string

NSPath returns the NSPath

func (*PURuntime) Name 

func (r *PURuntime) Name() string

Name returns the PID

func (*PURuntime) Options 

func (r *PURuntime) Options() OptionsType

Options returns tags for the processing unit

func (*PURuntime) PUType 

func (r *PURuntime) PUType() common.PUType

PUType returns the PU type

func (*PURuntime) Pid 

func (r *PURuntime) Pid() int

Pid returns the PID

func (*PURuntime) PortMap 

func (r *PURuntime) PortMap() map[nat.Port][]string

PortMap returns the mapping from host port->container port

func (*PURuntime) SetIPAddresses 

func (r *PURuntime) SetIPAddresses(ipa ExtendedMap)

SetIPAddresses sets up all the IP addresses for the processing unit

func (*PURuntime) SetNSPath added in v1.0.46 

func (r *PURuntime) SetNSPath(nsPath string)

SetNSPath sets the NSPath

func (*PURuntime) SetOptions 

func (r *PURuntime) SetOptions(options OptionsType)

SetOptions sets the Options

func (*PURuntime) SetPUType added in v1.0.3 

func (r *PURuntime) SetPUType(puType common.PUType)

SetPUType sets the PU Type

func (*PURuntime) SetPid 

func (r *PURuntime) SetPid(pid int)

SetPid sets the PID

func (*PURuntime) SetServices 

func (r *PURuntime) SetServices(services []common.Service)

SetServices updates the services of the runtime.

func (*PURuntime) SetTags 

func (r *PURuntime) SetTags(t *TagStore)

SetTags returns tags for the processing unit

func (*PURuntime) Tag 

func (r *PURuntime) Tag(key string) (string, bool)

Tag returns a specific tag for the processing unit

func (*PURuntime) Tags 

func (r *PURuntime) Tags() *TagStore

Tags returns tags for the processing unit

func (*PURuntime) UnmarshalJSON 

func (r *PURuntime) UnmarshalJSON(param []byte) error

UnmarshalJSON Unmarshals this struct.

type PURuntimeJSON 

type PURuntimeJSON struct {
	// PUType is the type of the PU
	PUType common.PUType
	// Pid holds the value of the first process of the container
	Pid int
	// NSPath is the path to the networking namespace for this PURuntime if applicable.
	NSPath string
	// Name is the name of the container
	Name string
	// IPAddress is the IP Address of the container
	IPAddresses ExtendedMap
	// Tags is a map of the metadata of the container
	Tags *TagStore
	// Options is a map of the options of the container
	Options *OptionsType
}

PURuntimeJSON is a Json representation of PURuntime

type Resolver 

type Resolver interface {

	// HandlePUEvent is called by all monitors when a PU event is generated. The implementer
	// is responsible to update all components by explicitly adding a new PU.
	HandlePUEvent(ctx context.Context, puID string, event common.Event, runtime RuntimeReader) error
}

A Resolver must be implemnted by a policy engine that receives monitor events.

type RuntimeReader 

type RuntimeReader interface {

	// Pid returns the Pid of the Runtime.
	Pid() int

	// Name returns the process name of the Runtime.
	Name() string

	// NSPath returns the path to the namespace of the PU, if applicable
	NSPath() string

	// Tag returns  the value of the given tag.
	Tag(string) (string, bool)

	// Tags returns a copy of the list of the tags.
	Tags() *TagStore

	// Options returns a copy of the list of options.
	Options() OptionsType

	// IPAddresses returns a copy of all the IP addresses.
	IPAddresses() ExtendedMap

	// Returns the PUType for the PU
	PUType() common.PUType

	// SetServices sets the services of the runtime.
	SetServices(services []common.Service)

	// PortMap returns portmap (container port -> host port)
	PortMap() map[nat.Port][]string
}

A RuntimeReader allows to get the specific parameters stored in the Runtime

type ServiceType 

type ServiceType int

ServiceType are the types of services that can are suported. 

const (
	ServiceL3 ServiceType = iota
	ServiceHTTP
	ServiceTCP
)

Values of ServiceType

type TagSelector 

type TagSelector struct {
	Clause []KeyValueOperator
	Policy *FlowPolicy
}

TagSelector info describes a tag selector key Operator value

type TagSelectorList 

type TagSelectorList []TagSelector

TagSelectorList defines a list of TagSelectors

func (TagSelectorList) Copy added in v1.0.10 

func (t TagSelectorList) Copy() TagSelectorList

Copy returns a copy of the TagSelectorList

type TagStore added in v1.0.10 

type TagStore struct {
	Tags []string
}

TagStore stores the tags - it allows duplicate key values

func NewTagStore added in v1.0.10 

func NewTagStore() *TagStore

NewTagStore creates a new TagStore

func NewTagStoreFromMap added in v1.0.10 

func NewTagStoreFromMap(tags map[string]string) *TagStore

NewTagStoreFromMap creates a tag store from an input map

func NewTagStoreFromSlice 

func NewTagStoreFromSlice(tags []string) *TagStore

NewTagStoreFromSlice creates a new tag store from a slice.

func (*TagStore) AppendKeyValue added in v1.0.10 

func (t *TagStore) AppendKeyValue(key, value string)

AppendKeyValue appends a key and value to the tag store

func (*TagStore) Copy added in v1.0.10 

func (t *TagStore) Copy() *TagStore

Copy copies a TagStore

func (*TagStore) Get added in v1.0.10 

func (t *TagStore) Get(key string) (string, bool)

Get does a lookup in the list of tags

func (*TagStore) GetSlice added in v1.0.10 

func (t *TagStore) GetSlice() []string

GetSlice returns the tagstore as a slice

func (*TagStore) IsEmpty 

func (t *TagStore) IsEmpty() bool

IsEmpty if no key value pairs exist.

func (*TagStore) Merge 

func (t *TagStore) Merge(m *TagStore) (merged int)

Merge merges tags from m into native tag store. if the key exists, the provided tag from m is ignored.

func (*TagStore) String 

func (t *TagStore) String() string

String provides a string representation of tag store.

Source Files

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Directories

Path Synopsis
Package mockpolicy is a generated GoMock package.
 Package mockpolicy is a generated GoMock package.

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