mirror of https://github.com/hashicorp/consul
641 lines
22 KiB
Go
641 lines
22 KiB
Go
package proxycfg
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import (
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"context"
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"fmt"
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"sort"
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"strings"
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"github.com/mitchellh/copystructure"
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"github.com/hashicorp/consul/acl"
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"github.com/hashicorp/consul/agent/structs"
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"github.com/hashicorp/consul/lib"
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"github.com/hashicorp/consul/proto/pbpeering"
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)
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// TODO(ingress): Can we think of a better for this bag of data?
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// A shared data structure that contains information about discovered upstreams
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type ConfigSnapshotUpstreams struct {
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Leaf *structs.IssuedCert
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MeshConfig *structs.MeshConfigEntry
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MeshConfigSet bool
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// DiscoveryChain is a map of UpstreamID -> CompiledDiscoveryChain's, and
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// is used to determine what services could be targeted by this upstream.
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// We then instantiate watches for those targets.
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DiscoveryChain map[UpstreamID]*structs.CompiledDiscoveryChain
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// WatchedDiscoveryChains is a map of UpstreamID -> CancelFunc's
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// in order to cancel any watches when the proxy's configuration is
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// changed. Ingress gateways and transparent proxies need this because
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// discovery chain watches are added and removed through the lifecycle
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// of a single proxycfg state instance.
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WatchedDiscoveryChains map[UpstreamID]context.CancelFunc
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// WatchedUpstreams is a map of UpstreamID -> (map of TargetID ->
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// CancelFunc's) in order to cancel any watches when the configuration is
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// changed.
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WatchedUpstreams map[UpstreamID]map[string]context.CancelFunc
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// WatchedUpstreamEndpoints is a map of UpstreamID -> (map of
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// TargetID -> CheckServiceNodes) and is used to determine the backing
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// endpoints of an upstream.
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WatchedUpstreamEndpoints map[UpstreamID]map[string]structs.CheckServiceNodes
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// WatchedPeerTrustBundles is a map of (PeerName -> CancelFunc) in order to cancel
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// watches for peer trust bundles any time the list of upstream peers changes.
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WatchedPeerTrustBundles map[string]context.CancelFunc
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// PeerTrustBundles is a map of (PeerName -> PeeringTrustBundle).
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// It is used to store trust bundles for upstream TLS transport sockets.
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PeerTrustBundles map[string]*pbpeering.PeeringTrustBundle
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// WatchedGateways is a map of UpstreamID -> (map of GatewayKey.String() ->
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// CancelFunc) in order to cancel watches for mesh gateways
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WatchedGateways map[UpstreamID]map[string]context.CancelFunc
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// WatchedGatewayEndpoints is a map of UpstreamID -> (map of
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// GatewayKey.String() -> CheckServiceNodes) and is used to determine the
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// backing endpoints of a mesh gateway.
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WatchedGatewayEndpoints map[UpstreamID]map[string]structs.CheckServiceNodes
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// UpstreamConfig is a map to an upstream's configuration.
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UpstreamConfig map[UpstreamID]*structs.Upstream
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// PassthroughEndpoints is a map of: UpstreamID -> (map of TargetID ->
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// (set of IP addresses)). It contains the upstream endpoints that
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// can be dialed directly by a transparent proxy.
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PassthroughUpstreams map[UpstreamID]map[string]map[string]struct{}
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// PassthroughIndices is a map of: address -> indexedTarget.
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// It is used to track the modify index associated with a passthrough address.
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// Tracking this index helps break ties when a single address is shared by
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// more than one upstream due to a race.
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PassthroughIndices map[string]indexedTarget
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// IntentionUpstreams is a set of upstreams inferred from intentions.
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//
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// This list only applies to proxies registered in 'transparent' mode.
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IntentionUpstreams map[UpstreamID]struct{}
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// PeerUpstreamEndpoints is a map of UpstreamID -> (set of IP addresses)
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// and used to determine the backing endpoints of an upstream in another
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// peer.
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PeerUpstreamEndpoints map[UpstreamID]structs.CheckServiceNodes
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}
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// indexedTarget is used to associate the Raft modify index of a resource
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// with the corresponding upstream target.
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type indexedTarget struct {
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upstreamID UpstreamID
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targetID string
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idx uint64
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}
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type GatewayKey struct {
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Datacenter string
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Partition string
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}
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func (k GatewayKey) String() string {
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resp := k.Datacenter
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if !acl.IsDefaultPartition(k.Partition) {
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resp = k.Partition + "." + resp
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}
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return resp
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}
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func (k GatewayKey) IsEmpty() bool {
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return k.Partition == "" && k.Datacenter == ""
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}
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func (k GatewayKey) Matches(dc, partition string) bool {
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return acl.EqualPartitions(k.Partition, partition) && k.Datacenter == dc
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}
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func gatewayKeyFromString(s string) GatewayKey {
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split := strings.SplitN(s, ".", 2)
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if len(split) == 1 {
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return GatewayKey{Datacenter: split[0], Partition: acl.DefaultPartitionName}
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}
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return GatewayKey{Partition: split[0], Datacenter: split[1]}
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}
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type configSnapshotConnectProxy struct {
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ConfigSnapshotUpstreams
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PeeringTrustBundlesSet bool
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PeeringTrustBundles []*pbpeering.PeeringTrustBundle
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WatchedServiceChecks map[structs.ServiceID][]structs.CheckType // TODO: missing garbage collection
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PreparedQueryEndpoints map[UpstreamID]structs.CheckServiceNodes // DEPRECATED:see:WatchedUpstreamEndpoints
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// NOTE: Intentions stores a list of lists as returned by the Intentions
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// Match RPC. So far we only use the first list as the list of matching
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// intentions.
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Intentions structs.Intentions
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IntentionsSet bool
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}
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// isEmpty is a test helper
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func (c *configSnapshotConnectProxy) isEmpty() bool {
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if c == nil {
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return true
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}
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return c.Leaf == nil &&
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!c.IntentionsSet &&
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len(c.DiscoveryChain) == 0 &&
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len(c.WatchedDiscoveryChains) == 0 &&
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len(c.WatchedUpstreams) == 0 &&
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len(c.WatchedUpstreamEndpoints) == 0 &&
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len(c.WatchedPeerTrustBundles) == 0 &&
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len(c.PeerTrustBundles) == 0 &&
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len(c.WatchedGateways) == 0 &&
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len(c.WatchedGatewayEndpoints) == 0 &&
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len(c.WatchedServiceChecks) == 0 &&
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len(c.PreparedQueryEndpoints) == 0 &&
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len(c.UpstreamConfig) == 0 &&
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len(c.PassthroughUpstreams) == 0 &&
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len(c.IntentionUpstreams) == 0 &&
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!c.PeeringTrustBundlesSet &&
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!c.MeshConfigSet &&
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len(c.PeerUpstreamEndpoints) == 0
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}
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type configSnapshotTerminatingGateway struct {
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MeshConfig *structs.MeshConfigEntry
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MeshConfigSet bool
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// WatchedServices is a map of service name to a cancel function. This cancel
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// function is tied to the watch of linked service instances for the given
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// id. If the linked services watch would indicate the removal of
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// a service altogether we then cancel watching that service for its endpoints.
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WatchedServices map[structs.ServiceName]context.CancelFunc
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// WatchedIntentions is a map of service name to a cancel function.
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// This cancel function is tied to the watch of intentions for linked services.
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// As with WatchedServices, intention watches will be cancelled when services
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// are no longer linked to the gateway.
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WatchedIntentions map[structs.ServiceName]context.CancelFunc
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// NOTE: Intentions stores a map of list of lists as returned by the Intentions
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// Match RPC. So far we only use the first list as the list of matching
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// intentions.
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//
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// A key being present implies that we have gotten at least one watch reply for the
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// service. This is logically the same as ConnectProxy.IntentionsSet==true
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Intentions map[structs.ServiceName]structs.Intentions
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// WatchedLeaves is a map of ServiceName to a cancel function.
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// This cancel function is tied to the watch of leaf certs for linked services.
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// As with WatchedServices, leaf watches will be cancelled when services
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// are no longer linked to the gateway.
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WatchedLeaves map[structs.ServiceName]context.CancelFunc
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// ServiceLeaves is a map of ServiceName to a leaf cert.
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// Terminating gateways will present different certificates depending
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// on the service that the caller is trying to reach.
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ServiceLeaves map[structs.ServiceName]*structs.IssuedCert
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// WatchedConfigs is a map of ServiceName to a cancel function. This cancel
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// function is tied to the watch of service configs for linked services. As
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// with WatchedServices, service config watches will be cancelled when
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// services are no longer linked to the gateway.
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WatchedConfigs map[structs.ServiceName]context.CancelFunc
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// ServiceConfigs is a map of service name to the resolved service config
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// for that service.
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ServiceConfigs map[structs.ServiceName]*structs.ServiceConfigResponse
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// WatchedResolvers is a map of ServiceName to a cancel function.
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// This cancel function is tied to the watch of resolvers for linked services.
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// As with WatchedServices, resolver watches will be cancelled when services
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// are no longer linked to the gateway.
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WatchedResolvers map[structs.ServiceName]context.CancelFunc
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// ServiceResolvers is a map of service name to an associated
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// service-resolver config entry for that service.
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ServiceResolvers map[structs.ServiceName]*structs.ServiceResolverConfigEntry
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ServiceResolversSet map[structs.ServiceName]bool
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// ServiceGroups is a map of service name to the service instances of that
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// service in the local datacenter.
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ServiceGroups map[structs.ServiceName]structs.CheckServiceNodes
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// GatewayServices is a map of service name to the config entry association
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// between the gateway and a service. TLS configuration stored here is
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// used for TLS origination from the gateway to the linked service.
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GatewayServices map[structs.ServiceName]structs.GatewayService
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// HostnameServices is a map of service name to service instances with a hostname as the address.
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// If hostnames are configured they must be provided to Envoy via CDS not EDS.
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HostnameServices map[structs.ServiceName]structs.CheckServiceNodes
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}
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// ValidServices returns the list of service keys that have enough data to be emitted.
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func (c *configSnapshotTerminatingGateway) ValidServices() []structs.ServiceName {
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out := make([]structs.ServiceName, 0, len(c.ServiceGroups))
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for svc := range c.ServiceGroups {
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// It only counts if ALL of our watches have come back (with data or not).
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// Skip the service if we don't know if there is a resolver or not.
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if _, ok := c.ServiceResolversSet[svc]; !ok {
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continue
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}
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// Skip the service if we don't have a cert to present for mTLS.
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if cert, ok := c.ServiceLeaves[svc]; !ok || cert == nil {
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continue
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}
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// Skip the service if we haven't gotten our intentions yet.
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if _, intentionsSet := c.Intentions[svc]; !intentionsSet {
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continue
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}
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// Skip the service if we haven't gotten our service config yet to know
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// the protocol.
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if _, ok := c.ServiceConfigs[svc]; !ok {
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continue
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}
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out = append(out, svc)
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}
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return out
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}
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// isEmpty is a test helper
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func (c *configSnapshotTerminatingGateway) isEmpty() bool {
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if c == nil {
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return true
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}
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return len(c.ServiceLeaves) == 0 &&
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len(c.WatchedLeaves) == 0 &&
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len(c.WatchedIntentions) == 0 &&
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len(c.Intentions) == 0 &&
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len(c.ServiceGroups) == 0 &&
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len(c.WatchedServices) == 0 &&
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len(c.ServiceResolvers) == 0 &&
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len(c.ServiceResolversSet) == 0 &&
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len(c.WatchedResolvers) == 0 &&
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len(c.ServiceConfigs) == 0 &&
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len(c.WatchedConfigs) == 0 &&
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len(c.GatewayServices) == 0 &&
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len(c.HostnameServices) == 0 &&
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!c.MeshConfigSet
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}
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type configSnapshotMeshGateway struct {
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// WatchedServices is a map of service name to a cancel function. This cancel
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// function is tied to the watch of connect enabled services for the given
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// id. If the main datacenter services watch would indicate the removal of
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// a service altogether we then cancel watching that service for its
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// connect endpoints.
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WatchedServices map[structs.ServiceName]context.CancelFunc
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// WatchedServicesSet indicates that the watch on the datacenters services
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// has completed. Even when there are no connect services, this being set
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// (and the Connect roots being available) will be enough for the config
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// snapshot to be considered valid. In the case of Envoy, this allows it to
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// start its listeners even when no services would be proxied and allow its
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// health check to pass.
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WatchedServicesSet bool
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// WatchedGateways is a map of GatewayKeys to a cancel function.
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// This cancel function is tied to the watch of mesh-gateway services in
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// that datacenter/partition.
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WatchedGateways map[string]context.CancelFunc
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// ServiceGroups is a map of service name to the service instances of that
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// service in the local datacenter.
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ServiceGroups map[structs.ServiceName]structs.CheckServiceNodes
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// ServiceResolvers is a map of service name to an associated
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// service-resolver config entry for that service.
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ServiceResolvers map[structs.ServiceName]*structs.ServiceResolverConfigEntry
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// GatewayGroups is a map of datacenter names to services of kind
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// mesh-gateway in that datacenter.
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GatewayGroups map[string]structs.CheckServiceNodes
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// FedStateGateways is a map of datacenter names to mesh gateways in that
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// datacenter.
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FedStateGateways map[string]structs.CheckServiceNodes
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// ConsulServers is the list of consul servers in this datacenter.
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ConsulServers structs.CheckServiceNodes
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// HostnameDatacenters is a map of datacenters to mesh gateway instances with a hostname as the address.
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// If hostnames are configured they must be provided to Envoy via CDS not EDS.
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HostnameDatacenters map[string]structs.CheckServiceNodes
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}
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func (c *configSnapshotMeshGateway) GatewayKeys() []GatewayKey {
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sz1, sz2 := len(c.GatewayGroups), len(c.FedStateGateways)
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sz := sz1
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if sz2 > sz1 {
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sz = sz2
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}
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keys := make([]GatewayKey, 0, sz)
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for key := range c.FedStateGateways {
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keys = append(keys, gatewayKeyFromString(key))
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}
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for key := range c.GatewayGroups {
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gk := gatewayKeyFromString(key)
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if _, ok := c.FedStateGateways[gk.Datacenter]; !ok {
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keys = append(keys, gk)
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}
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}
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// Always sort the results to ensure we generate deterministic things over
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// xDS, such as mesh-gateway listener filter chains.
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sort.Slice(keys, func(i, j int) bool {
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if keys[i].Datacenter != keys[j].Datacenter {
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return keys[i].Datacenter < keys[j].Datacenter
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}
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return keys[i].Partition < keys[j].Partition
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})
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return keys
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}
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// isEmpty is a test helper
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func (c *configSnapshotMeshGateway) isEmpty() bool {
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if c == nil {
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return true
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}
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return len(c.WatchedServices) == 0 &&
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!c.WatchedServicesSet &&
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len(c.WatchedGateways) == 0 &&
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len(c.ServiceGroups) == 0 &&
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len(c.ServiceResolvers) == 0 &&
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len(c.GatewayGroups) == 0 &&
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len(c.FedStateGateways) == 0 &&
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len(c.ConsulServers) == 0 &&
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len(c.HostnameDatacenters) == 0
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}
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type configSnapshotIngressGateway struct {
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ConfigSnapshotUpstreams
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// TLSConfig is the gateway-level TLS configuration. Listener/service level
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// config is preserved in the Listeners map below.
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TLSConfig structs.GatewayTLSConfig
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// GatewayConfigLoaded is used to determine if we have received the initial
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// ingress-gateway config entry yet.
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GatewayConfigLoaded bool
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// Hosts is the list of extra host entries to add to our leaf cert's DNS SANs.
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Hosts []string
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HostsSet bool
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// LeafCertWatchCancel is a CancelFunc to use when refreshing this gateway's
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// leaf cert watch with different parameters.
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LeafCertWatchCancel context.CancelFunc
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// Upstreams is a list of upstreams this ingress gateway should serve traffic
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// to. This is constructed from the ingress-gateway config entry, and uses
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// the GatewayServices RPC to retrieve them.
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Upstreams map[IngressListenerKey]structs.Upstreams
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// UpstreamsSet is the unique set of UpstreamID the gateway routes to.
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UpstreamsSet map[UpstreamID]struct{}
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// Listeners is the original listener config from the ingress-gateway config
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// entry to save us trying to pass fields through Upstreams
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Listeners map[IngressListenerKey]structs.IngressListener
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}
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// isEmpty is a test helper
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func (c *configSnapshotIngressGateway) isEmpty() bool {
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if c == nil {
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return true
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}
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return len(c.Upstreams) == 0 &&
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len(c.UpstreamsSet) == 0 &&
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len(c.DiscoveryChain) == 0 &&
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len(c.WatchedUpstreams) == 0 &&
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len(c.WatchedUpstreamEndpoints) == 0 &&
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!c.MeshConfigSet
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}
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type IngressListenerKey struct {
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Protocol string
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Port int
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}
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func (k *IngressListenerKey) RouteName() string {
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return fmt.Sprintf("%d", k.Port)
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}
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func IngressListenerKeyFromGWService(s structs.GatewayService) IngressListenerKey {
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return IngressListenerKey{Protocol: s.Protocol, Port: s.Port}
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}
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func IngressListenerKeyFromListener(l structs.IngressListener) IngressListenerKey {
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return IngressListenerKey{Protocol: l.Protocol, Port: l.Port}
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}
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// ConfigSnapshot captures all the resulting config needed for a proxy instance.
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// It is meant to be point-in-time coherent and is used to deliver the current
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// config state to observers who need it to be pushed in (e.g. XDS server).
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type ConfigSnapshot struct {
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Kind structs.ServiceKind
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Service string
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ProxyID ProxyID
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Address string
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Port int
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ServiceMeta map[string]string
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TaggedAddresses map[string]structs.ServiceAddress
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Proxy structs.ConnectProxyConfig
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Datacenter string
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IntentionDefaultAllow bool
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Locality GatewayKey
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ServerSNIFn ServerSNIFunc
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Roots *structs.IndexedCARoots
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// connect-proxy specific
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ConnectProxy configSnapshotConnectProxy
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// terminating-gateway specific
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TerminatingGateway configSnapshotTerminatingGateway
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// mesh-gateway specific
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MeshGateway configSnapshotMeshGateway
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// ingress-gateway specific
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IngressGateway configSnapshotIngressGateway
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}
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// Valid returns whether or not the snapshot has all required fields filled yet.
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func (s *ConfigSnapshot) Valid() bool {
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switch s.Kind {
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case structs.ServiceKindConnectProxy:
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if s.Proxy.Mode == structs.ProxyModeTransparent && !s.ConnectProxy.MeshConfigSet {
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return false
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}
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return s.Roots != nil &&
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s.ConnectProxy.Leaf != nil &&
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s.ConnectProxy.IntentionsSet &&
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s.ConnectProxy.MeshConfigSet
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case structs.ServiceKindTerminatingGateway:
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return s.Roots != nil &&
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s.TerminatingGateway.MeshConfigSet
|
|
|
|
case structs.ServiceKindMeshGateway:
|
|
if s.ServiceMeta[structs.MetaWANFederationKey] == "1" {
|
|
if len(s.MeshGateway.ConsulServers) == 0 {
|
|
return false
|
|
}
|
|
}
|
|
return s.Roots != nil &&
|
|
(s.MeshGateway.WatchedServicesSet || len(s.MeshGateway.ServiceGroups) > 0)
|
|
|
|
case structs.ServiceKindIngressGateway:
|
|
return s.Roots != nil &&
|
|
s.IngressGateway.Leaf != nil &&
|
|
s.IngressGateway.GatewayConfigLoaded &&
|
|
s.IngressGateway.HostsSet &&
|
|
s.IngressGateway.MeshConfigSet
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
|
|
// Clone makes a deep copy of the snapshot we can send to other goroutines
|
|
// without worrying that they will racily read or mutate shared maps etc.
|
|
func (s *ConfigSnapshot) Clone() (*ConfigSnapshot, error) {
|
|
snapCopy, err := copystructure.Copy(s)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
snap := snapCopy.(*ConfigSnapshot)
|
|
|
|
// nil these out as anything receiving one of these clones does not need them and should never "cancel" our watches
|
|
switch s.Kind {
|
|
case structs.ServiceKindConnectProxy:
|
|
// common with connect-proxy and ingress-gateway
|
|
snap.ConnectProxy.WatchedUpstreams = nil
|
|
snap.ConnectProxy.WatchedGateways = nil
|
|
snap.ConnectProxy.WatchedDiscoveryChains = nil
|
|
snap.ConnectProxy.WatchedPeerTrustBundles = nil
|
|
case structs.ServiceKindTerminatingGateway:
|
|
snap.TerminatingGateway.WatchedServices = nil
|
|
snap.TerminatingGateway.WatchedIntentions = nil
|
|
snap.TerminatingGateway.WatchedLeaves = nil
|
|
snap.TerminatingGateway.WatchedConfigs = nil
|
|
snap.TerminatingGateway.WatchedResolvers = nil
|
|
case structs.ServiceKindMeshGateway:
|
|
snap.MeshGateway.WatchedGateways = nil
|
|
snap.MeshGateway.WatchedServices = nil
|
|
case structs.ServiceKindIngressGateway:
|
|
// common with connect-proxy and ingress-gateway
|
|
snap.IngressGateway.WatchedUpstreams = nil
|
|
snap.IngressGateway.WatchedGateways = nil
|
|
snap.IngressGateway.WatchedDiscoveryChains = nil
|
|
snap.IngressGateway.WatchedPeerTrustBundles = nil
|
|
// only ingress-gateway
|
|
snap.IngressGateway.LeafCertWatchCancel = nil
|
|
}
|
|
|
|
return snap, nil
|
|
}
|
|
|
|
func (s *ConfigSnapshot) Leaf() *structs.IssuedCert {
|
|
switch s.Kind {
|
|
case structs.ServiceKindConnectProxy:
|
|
return s.ConnectProxy.Leaf
|
|
case structs.ServiceKindIngressGateway:
|
|
return s.IngressGateway.Leaf
|
|
default:
|
|
return nil
|
|
}
|
|
}
|
|
|
|
// RootPEMs returns all PEM-encoded public certificates for the root CA.
|
|
func (s *ConfigSnapshot) RootPEMs() string {
|
|
var rootPEMs string
|
|
for _, root := range s.Roots.Roots {
|
|
rootPEMs += lib.EnsureTrailingNewline(root.RootCert)
|
|
}
|
|
return rootPEMs
|
|
}
|
|
|
|
func (s *ConfigSnapshot) MeshConfig() *structs.MeshConfigEntry {
|
|
switch s.Kind {
|
|
case structs.ServiceKindConnectProxy:
|
|
return s.ConnectProxy.MeshConfig
|
|
case structs.ServiceKindIngressGateway:
|
|
return s.IngressGateway.MeshConfig
|
|
case structs.ServiceKindTerminatingGateway:
|
|
return s.TerminatingGateway.MeshConfig
|
|
default:
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func (s *ConfigSnapshot) MeshConfigTLSIncoming() *structs.MeshDirectionalTLSConfig {
|
|
mesh := s.MeshConfig()
|
|
if mesh == nil || mesh.TLS == nil {
|
|
return nil
|
|
}
|
|
return mesh.TLS.Incoming
|
|
}
|
|
|
|
func (s *ConfigSnapshot) MeshConfigTLSOutgoing() *structs.MeshDirectionalTLSConfig {
|
|
mesh := s.MeshConfig()
|
|
if mesh == nil || mesh.TLS == nil {
|
|
return nil
|
|
}
|
|
return mesh.TLS.Outgoing
|
|
}
|
|
|
|
func (u *ConfigSnapshotUpstreams) UpstreamPeerMeta(uid UpstreamID) structs.PeeringServiceMeta {
|
|
nodes := u.PeerUpstreamEndpoints[uid]
|
|
if len(nodes) == 0 {
|
|
return structs.PeeringServiceMeta{}
|
|
}
|
|
|
|
// In agent/rpc/peering/subscription_manager.go we denormalize the
|
|
// PeeringServiceMeta data onto each replicated service instance to convey
|
|
// this information back to the importing side of the peering.
|
|
//
|
|
// This data is guaranteed (subject to any eventual consistency lag around
|
|
// updates) to be the same across all instances, so we only need to take
|
|
// the first item.
|
|
//
|
|
// TODO(peering): consider replicating this "common to all instances" data
|
|
// using a different replication type and persist it separately in the
|
|
// catalog to avoid this weird construction.
|
|
csn := nodes[0]
|
|
if csn.Service == nil {
|
|
return structs.PeeringServiceMeta{}
|
|
}
|
|
return *csn.Service.Connect.PeerMeta
|
|
}
|
|
|
|
func (u *ConfigSnapshotUpstreams) PeeredUpstreamIDs() []UpstreamID {
|
|
out := make([]UpstreamID, 0, len(u.UpstreamConfig))
|
|
for uid := range u.UpstreamConfig {
|
|
if uid.Peer == "" {
|
|
continue
|
|
}
|
|
|
|
if _, ok := u.PeerTrustBundles[uid.Peer]; uid.Peer != "" && !ok {
|
|
// The trust bundle for this upstream is not available yet, skip for now.
|
|
continue
|
|
}
|
|
|
|
out = append(out, uid)
|
|
}
|
|
return out
|
|
}
|