envoy

package
v1.15.10 Latest Latest
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 Go to latest Published: Oct 10, 2024 License: Apache-2.0 Imports: 81 Imported by: 9

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Index

Constants

View Source 
const (
	// ListenerTypeURL is the type URL of Listener resources.
	ListenerTypeURL = "type.googleapis.com/envoy.config.listener.v3.Listener"

	// RouteTypeURL is the type URL of HTTP Route resources.
	RouteTypeURL = "type.googleapis.com/envoy.config.route.v3.RouteConfiguration"

	// ClusterTypeURL is the type URL of Cluster resources.
	ClusterTypeURL = "type.googleapis.com/envoy.config.cluster.v3.Cluster"

	// HttpConnectionManagerTypeURL is the type URL of HttpConnectionManager filter.
	HttpConnectionManagerTypeURL = "type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager"

	// TCPProxyTypeURL is the type URL of TCPProxy filter.
	TCPProxyTypeURL = "type.googleapis.com/envoy.extensions.filters.network.tcp_proxy.v3.TcpProxy"

	// EndpointTypeURL is the type URL of Endpoint resources.
	EndpointTypeURL = "type.googleapis.com/envoy.config.endpoint.v3.ClusterLoadAssignment"

	// SecretTypeURL is the type URL of Endpoint resources.
	SecretTypeURL = "type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.Secret"

	// NetworkPolicyTypeURL is the type URL of NetworkPolicy resources.
	NetworkPolicyTypeURL = "type.googleapis.com/cilium.NetworkPolicy"

	// NetworkPolicyHostsTypeURL is the type URL of NetworkPolicyHosts resources.
	NetworkPolicyHostsTypeURL = "type.googleapis.com/cilium.NetworkPolicyHosts"

	// HealthCheckSinkPipeTypeURL is the type URL of NetworkPolicyHosts resources.
	HealthCheckSinkPipeTypeURL = "type.googleapis.com/cilium.health_check.event_sink.pipe"

	// DownstreamTlsContextURL is the type URL of DownstreamTlsContext
	DownstreamTlsContextURL = "type.googleapis.com/envoy.extensions.transport_sockets.tls.v3.DownstreamTlsContext"
)
View Source 
const (
	CiliumXDSClusterName = "xds-grpc-cilium"
)

Variables

View Source 
var Cell = cell.Module(
	"envoy-proxy",
	"Envoy proxy and control-plane",

	cell.Provide(newEnvoyXDSServer),
	cell.Provide(newEnvoyAdminClient),
	cell.ProvidePrivate(newEnvoyAccessLogServer),
	cell.ProvidePrivate(newLocalEndpointStore),
	cell.ProvidePrivate(newArtifactCopier),
	cell.Invoke(registerEnvoyVersionCheck),
)

Cell initializes and manages the Envoy proxy and its control-plane components like xDS- and accesslog server. It is used to provide support for Ingress, GatewayAPI and L7 network policies (e.g. HTTP).

View Source 
var (
	// ErrNotImplemented is the error returned by gRPC methods that are not
	// implemented by Cilium.
	ErrNotImplemented = errors.New("not implemented")
)

Functions

func EnableTracing 

func EnableTracing()

EnableTracing changes Envoy log level to "trace", producing the most logs.

func GetEnvoyHTTPRules 

func GetEnvoyHTTPRules(secretManager certificatemanager.SecretManager, l7Rules *api.L7Rules, ns string) (*cilium.HttpNetworkPolicyRules, bool)

func GetFlowType 

func GetFlowType(m *cilium.LogEntry) accesslog.FlowType

GetFlowType returns the type of flow (request|response)

func GetNetHttpHeaders 

func GetNetHttpHeaders(httpHeaders []*cilium.KeyValue) http.Header

getNetHttpHeaders returns the Headers as net.http.Header

func GetProtocol 

func GetProtocol(httpProtocol cilium.HttpProtocol) string

getProtocol returns the HTTP protocol in the format that Cilium understands

func GetSocketDir 

func GetSocketDir(runDir string) string

func GetUpstreamCodecFilter added in v1.14.15 

func GetUpstreamCodecFilter() *envoy_config_http.HttpFilter

func GetVerdict 

func GetVerdict(m *cilium.LogEntry) accesslog.FlowVerdict

GetVerdict returns the verdict performed on the flow (forwarded|denied)

func HTTPNetworkPolicyRuleLess 

func HTTPNetworkPolicyRuleLess(r1, r2 *cilium.HttpNetworkPolicyRule) bool

HTTPNetworkPolicyRuleLess reports whether the r1 rule should sort before the r2 rule.

func HeaderMatcherLess 

func HeaderMatcherLess(m1, m2 *envoy_config_route.HeaderMatcher) bool

HeaderMatcherLess reports whether the m1 matcher should sort before the m2 matcher.

func ParseURL 

func ParseURL(scheme, host, path string) *url.URL

ParseURL returns the URL as *net.url.URL

func PortNetworkPolicyRuleLess 

func PortNetworkPolicyRuleLess(r1, r2 *cilium.PortNetworkPolicyRule) bool

PortNetworkPolicyRuleLess reports whether the r1 rule should sort before the r2 rule. L3-L4-only rules are less than L7 rules.

func SortHTTPNetworkPolicyRules 

func SortHTTPNetworkPolicyRules(rules []*cilium.HttpNetworkPolicyRule)

SortHTTPNetworkPolicyRules sorts the given slice.

func SortHeaderMatchers 

func SortHeaderMatchers(headers []*envoy_config_route.HeaderMatcher)

SortHeaderMatchers sorts the given slice.

func SortPortNetworkPolicies 

func SortPortNetworkPolicies(policies []*cilium.PortNetworkPolicy) []*cilium.PortNetworkPolicy

SortPortNetworkPolicies sorts the given slice in place and returns the sorted slice for convenience.

func SortPortNetworkPolicyRules 

func SortPortNetworkPolicyRules(rules []*cilium.PortNetworkPolicyRule) []*cilium.PortNetworkPolicyRule

SortPortNetworkPolicyRules sorts the given slice in place and returns the sorted slice for convenience.

Types

type AccessLogServer 

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

type ArtifactCopier added in v1.15.0 

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

ArtifactCopier provides support for copying artifacts from a given source directory to a target directory. This is mainly used to copy additional artifacts referenced by the Envoy proxy configuration from the Cilium agent container to the config directory that is shared with the Envoy container if Envoy is running in a dedicated DaemonSet.

func (*ArtifactCopier) Copy added in v1.15.0 

func (r *ArtifactCopier) Copy() (err error)

Copy copies all files within the given sourcePath directory into the targetPath directory.

If targetPath already exists, all existing files within the directory are deleted before starting the copy process. If targetPath doesn't exist, it gets created automatically before starting the copy process.

type EmbeddedEnvoy 

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

Envoy manages a running Envoy proxy instance via the ListenerDiscoveryService and RouteDiscoveryService gRPC APIs.

func (*EmbeddedEnvoy) GetAdminClient 

func (e *EmbeddedEnvoy) GetAdminClient() *EnvoyAdminClient

func (*EmbeddedEnvoy) Stop 

func (e *EmbeddedEnvoy) Stop() error

Stop kills the Envoy process started with startEmbeddedEnvoy. The gRPC API streams are terminated first.

type EnvoyAdminClient 

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

func NewEnvoyAdminClientForSocket 

func NewEnvoyAdminClientForSocket(envoySocketDir string) *EnvoyAdminClient

func (*EnvoyAdminClient) ChangeLogLevel 

func (a *EnvoyAdminClient) ChangeLogLevel(level logrus.Level) error

ChangeLogLevel changes Envoy log level to correspond to the logrus log level 'level'.

func (*EnvoyAdminClient) GetEnvoyVersion 

func (a *EnvoyAdminClient) GetEnvoyVersion() (string, error)

GetEnvoyVersion returns the envoy binary version string

type HTTPNetworkPolicyRuleSlice 

type HTTPNetworkPolicyRuleSlice []*cilium.HttpNetworkPolicyRule

HTTPNetworkPolicyRuleSlice implements sort.Interface to sort a slice of *cilium.HttpNetworkPolicyRule.

func (HTTPNetworkPolicyRuleSlice) Len 

func (s HTTPNetworkPolicyRuleSlice) Len() int

func (HTTPNetworkPolicyRuleSlice) Less 

func (s HTTPNetworkPolicyRuleSlice) Less(i, j int) bool

func (HTTPNetworkPolicyRuleSlice) Swap 

func (s HTTPNetworkPolicyRuleSlice) Swap(i, j int)

type HeaderMatcherSlice 

type HeaderMatcherSlice []*envoy_config_route.HeaderMatcher

HeaderMatcherSlice implements sort.Interface to sort a slice of *envoy_config_route.HeaderMatcher.

func (HeaderMatcherSlice) Len 

func (s HeaderMatcherSlice) Len() int

func (HeaderMatcherSlice) Less 

func (s HeaderMatcherSlice) Less(i, j int) bool

func (HeaderMatcherSlice) Swap 

func (s HeaderMatcherSlice) Swap(i, j int)

type IPCacheEventSource 

type IPCacheEventSource interface {
	AddListener(ipcache.IPIdentityMappingListener)
}

type Listener 

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

type LocalEndpointStore 

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

LocalEndpointStore tracks the mapping between a given endpoint IP and the actual local endpoint.

type NPHDSCache 

type NPHDSCache struct {
	*xds.Cache
	// contains filtered or unexported fields
}

NPHDSCache is a cache of resources in the Network Policy Hosts Discovery Service.

NetworkPolicyHostsCache is the global cache of resources of type NetworkPolicyHosts. Resources in this cache must have the NetworkPolicyHostsTypeURL type URL.

func (*NPHDSCache) HandleResourceVersionAck 

func (cache *NPHDSCache) HandleResourceVersionAck(ackVersion uint64, nackVersion uint64, nodeIP string, resourceNames []string, typeURL string, detail string)

HandleResourceVersionAck is required to implement ResourceVersionAckObserver. We use this to start the IP Cache listener on the first ACK so that we only start the IP Cache listener if there is an Envoy node that uses NPHDS (e.g., Istio node, or host proxy running on kernel w/o LPM bpf map support).

func (*NPHDSCache) OnIPIdentityCacheChange 

func (cache *NPHDSCache) OnIPIdentityCacheChange(modType ipcache.CacheModification, cidrCluster cmtypes.PrefixCluster,
	oldHostIP, newHostIP net.IP, oldID *ipcache.Identity, newID ipcache.Identity,
	encryptKey uint8, k8sMeta *ipcache.K8sMetadata)

OnIPIdentityCacheChange pushes modifications to the IP<->Identity mapping into the Network Policy Host Discovery Service (NPHDS).

Note that the caller is responsible for passing 'oldID' when 'cidrCluster' has been associated with a different ID before, as this function does not search for conflicting IP/ID mappings.

type PortAllocator 

type PortAllocator interface {
	AllocateProxyPort(name string, ingress, localOnly bool) (uint16, error)
	AckProxyPort(ctx context.Context, name string) error
	ReleaseProxyPort(name string) error
}

type PortNetworkPolicyRuleSlice 

type PortNetworkPolicyRuleSlice []*cilium.PortNetworkPolicyRule

PortNetworkPolicyRuleSlice implements sort.Interface to sort a slice of *cilium.PortNetworkPolicyRuleSlice.

func (PortNetworkPolicyRuleSlice) Len 

func (s PortNetworkPolicyRuleSlice) Len() int

func (PortNetworkPolicyRuleSlice) Less 

func (s PortNetworkPolicyRuleSlice) Less(i, j int) bool

func (PortNetworkPolicyRuleSlice) Swap 

func (s PortNetworkPolicyRuleSlice) Swap(i, j int)

type PortNetworkPolicySlice 

type PortNetworkPolicySlice []*cilium.PortNetworkPolicy

PortNetworkPolicySlice implements sort.Interface to sort a slice of *cilium.PortNetworkPolicy.

func (PortNetworkPolicySlice) Len 

func (s PortNetworkPolicySlice) Len() int

func (PortNetworkPolicySlice) Less 

func (s PortNetworkPolicySlice) Less(i, j int) bool

func (PortNetworkPolicySlice) Swap 

func (s PortNetworkPolicySlice) Swap(i, j int)

type Resources 

type Resources struct {
	Listeners []*envoy_config_listener.Listener
	Secrets   []*envoy_config_tls.Secret
	Routes    []*envoy_config_route.RouteConfiguration
	Clusters  []*envoy_config_cluster.Cluster
	Endpoints []*envoy_config_endpoint.ClusterLoadAssignment
	// contains filtered or unexported fields
}

Resources contains all Envoy resources parsed from a CiliumEnvoyConfig CRD

func ParseResources 

func ParseResources(cecNamespace string, cecName string, anySlice []cilium_v2.XDSResource, validate bool, portAllocator PortAllocator, isL7LB bool, useOriginalSourceAddr bool) (Resources, error)

ParseResources parses all supported Envoy resource types from CiliumEnvoyConfig CRD to Resources type cecNamespace and cecName parameters, if not empty, will be prepended to the Envoy resource names.

func (*Resources) ListenersAddedOrDeleted 

func (old *Resources) ListenersAddedOrDeleted(new *Resources) bool

ListenersAddedOrDeleted returns 'true' if a listener is added or removed when updating from 'old' to 'new'

type XDSServer 

type XDSServer interface {
	// AddListener adds a listener to a running Envoy proxy.
	AddListener(name string, kind policy.L7ParserType, port uint16, isIngress bool, mayUseOriginalSourceAddr bool, wg *completion.WaitGroup)
	// AddMetricsListener adds a prometheus metrics listener to Envoy.
	AddMetricsListener(port uint16, wg *completion.WaitGroup)
	// RemoveListener removes an existing Envoy Listener.
	RemoveListener(name string, wg *completion.WaitGroup) xds.AckingResourceMutatorRevertFunc

	// UpsertEnvoyResources inserts or updates Envoy resources in 'resources' to the xDS cache,
	// from where they will be delivered to Envoy via xDS streaming gRPC.
	UpsertEnvoyResources(ctx context.Context, resources Resources, portAllocator PortAllocator) error
	// UpdateEnvoyResources removes any resources in 'old' that are not
	// present in 'new' and then adds or updates all resources in 'new'.
	// Envoy does not support changing the listening port of an existing
	// listener, so if the port changes we have to delete the old listener
	// and then add the new one with the new port number.
	UpdateEnvoyResources(ctx context.Context, old, new Resources, portAllocator PortAllocator) error
	// DeleteEnvoyResources deletes all Envoy resources in 'resources'.
	DeleteEnvoyResources(ctx context.Context, resources Resources, portAllocator PortAllocator) error

	UpsertEnvoyEndpoints(serviceName loadbalancer.ServiceName, backendMap map[string][]*loadbalancer.Backend) error

	// GetNetworkPolicies returns the current version of the network policies with the given names.
	// If resourceNames is empty, all resources are returned.
	//
	// Only used for testing
	GetNetworkPolicies(resourceNames []string) (map[string]*cilium.NetworkPolicy, error)
	// UpdateNetworkPolicy adds or updates a network policy in the set published to L7 proxies.
	// When the proxy acknowledges the network policy update, it will result in
	// a subsequent call to the endpoint's OnProxyPolicyUpdate() function.
	UpdateNetworkPolicy(ep endpoint.EndpointUpdater, vis *policy.VisibilityPolicy, policy *policy.L4Policy, ingressPolicyEnforced, egressPolicyEnforced bool, wg *completion.WaitGroup) (error, func() error)
	// RemoveNetworkPolicy removes network policies relevant to the specified
	// endpoint from the set published to L7 proxies, and stops listening for
	// acks for policies on this endpoint.
	RemoveNetworkPolicy(ep endpoint.EndpointInfoSource)
	// RemoveAllNetworkPolicies removes all network policies from the set published
	// to L7 proxies.
	RemoveAllNetworkPolicies()
}

XDSServer provides a high-lever interface to manage resources published using the xDS gRPC API.

Source Files

View all Source files

Directories

Path Synopsis
Package xds is an implementation of Envoy's xDS (Discovery Service) protocol.
 Package xds is an implementation of Envoy's xDS (Discovery Service) protocol.

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