open-consul/agent/proxycfg/snapshot.go

88 lines
3.0 KiB
Go

package proxycfg
import (
"context"
"github.com/hashicorp/consul/agent/structs"
"github.com/mitchellh/copystructure"
)
type configSnapshotConnectProxy struct {
Leaf *structs.IssuedCert
DiscoveryChain map[string]*structs.CompiledDiscoveryChain // this is keyed by the Upstream.Identifier(), not the chain name
WatchedUpstreams map[string]map[string]context.CancelFunc
WatchedUpstreamEndpoints map[string]map[string]structs.CheckServiceNodes
WatchedGateways map[string]map[string]context.CancelFunc
WatchedGatewayEndpoints map[string]map[string]structs.CheckServiceNodes
UpstreamEndpoints map[string]structs.CheckServiceNodes // DEPRECATED:see:WatchedUpstreamEndpoints
}
type configSnapshotMeshGateway struct {
WatchedServices map[string]context.CancelFunc
WatchedDatacenters map[string]context.CancelFunc
ServiceGroups map[string]structs.CheckServiceNodes
ServiceResolvers map[string]*structs.ServiceResolverConfigEntry
GatewayGroups map[string]structs.CheckServiceNodes
}
// ConfigSnapshot captures all the resulting config needed for a proxy instance.
// It is meant to be point-in-time coherent and is used to deliver the current
// config state to observers who need it to be pushed in (e.g. XDS server).
type ConfigSnapshot struct {
Kind structs.ServiceKind
Service string
ProxyID string
Address string
Port int
TaggedAddresses map[string]structs.ServiceAddress
Proxy structs.ConnectProxyConfig
Datacenter string
Roots *structs.IndexedCARoots
// connect-proxy specific
ConnectProxy configSnapshotConnectProxy
// mesh-gateway specific
MeshGateway configSnapshotMeshGateway
// Skip intentions for now as we don't push those down yet, just pre-warm them.
}
// Valid returns whether or not the snapshot has all required fields filled yet.
func (s *ConfigSnapshot) Valid() bool {
switch s.Kind {
case structs.ServiceKindConnectProxy:
// TODO(rb): sanity check discovery chain things here?
return s.Roots != nil && s.ConnectProxy.Leaf != nil
case structs.ServiceKindMeshGateway:
// TODO (mesh-gateway) - what happens if all the connect services go away
return s.Roots != nil && len(s.MeshGateway.ServiceGroups) > 0
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:
snap.ConnectProxy.WatchedUpstreams = nil
snap.ConnectProxy.WatchedGateways = nil
case structs.ServiceKindMeshGateway:
snap.MeshGateway.WatchedDatacenters = nil
snap.MeshGateway.WatchedServices = nil
}
return snap, nil
}