open-consul/agent/proxycfg-glue/glue.go

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package proxycfgglue
import (
"context"
"github.com/hashicorp/consul/proto/pbpeering"
"github.com/hashicorp/go-memdb"
"github.com/hashicorp/consul/acl"
"github.com/hashicorp/consul/agent/cache"
cachetype "github.com/hashicorp/consul/agent/cache-types"
"github.com/hashicorp/consul/agent/configentry"
"github.com/hashicorp/consul/agent/consul/discoverychain"
"github.com/hashicorp/consul/agent/consul/state"
"github.com/hashicorp/consul/agent/consul/watch"
"github.com/hashicorp/consul/agent/proxycfg"
"github.com/hashicorp/consul/agent/structs"
)
// Store is the state store interface required for server-local data sources.
type Store interface {
watch.StateStore
ExportedServicesForAllPeersByName(ws memdb.WatchSet, entMeta acl.EnterpriseMeta) (uint64, map[string]structs.ServiceList, error)
FederationStateList(ws memdb.WatchSet) (uint64, []*structs.FederationState, error)
GatewayServices(ws memdb.WatchSet, gateway string, entMeta *acl.EnterpriseMeta) (uint64, structs.GatewayServices, error)
IntentionTopology(ws memdb.WatchSet, target structs.ServiceName, downstreams bool, defaultDecision acl.EnforcementDecision, intentionTarget structs.IntentionTargetType) (uint64, structs.ServiceList, error)
ServiceDiscoveryChain(ws memdb.WatchSet, serviceName string, entMeta *acl.EnterpriseMeta, req discoverychain.CompileRequest) (uint64, *structs.CompiledDiscoveryChain, *configentry.DiscoveryChainSet, error)
PeeringTrustBundleRead(ws memdb.WatchSet, q state.Query) (uint64, *pbpeering.PeeringTrustBundle, error)
PeeringTrustBundleList(ws memdb.WatchSet, entMeta acl.EnterpriseMeta) (uint64, []*pbpeering.PeeringTrustBundle, error)
TrustBundleListByService(ws memdb.WatchSet, service, dc string, entMeta acl.EnterpriseMeta) (uint64, []*pbpeering.PeeringTrustBundle, error)
VirtualIPsForAllImportedServices(ws memdb.WatchSet, entMeta acl.EnterpriseMeta) (uint64, []state.ServiceVirtualIP, error)
}
// CacheCARoots satisfies the proxycfg.CARoots interface by sourcing data from
// the agent cache.
func CacheCARoots(c *cache.Cache) proxycfg.CARoots {
return &cacheProxyDataSource[*structs.DCSpecificRequest]{c, cachetype.ConnectCARootName}
}
// CacheConfigEntry satisfies the proxycfg.ConfigEntry interface by sourcing
// data from the agent cache.
func CacheConfigEntry(c *cache.Cache) proxycfg.ConfigEntry {
return &cacheProxyDataSource[*structs.ConfigEntryQuery]{c, cachetype.ConfigEntryName}
}
// CacheConfigEntryList satisfies the proxycfg.ConfigEntryList interface by
// sourcing data from the agent cache.
func CacheConfigEntryList(c *cache.Cache) proxycfg.ConfigEntryList {
return &cacheProxyDataSource[*structs.ConfigEntryQuery]{c, cachetype.ConfigEntryListName}
}
// CacheDatacenters satisfies the proxycfg.Datacenters interface by sourcing
// data from the agent cache.
func CacheDatacenters(c *cache.Cache) proxycfg.Datacenters {
return &cacheProxyDataSource[*structs.DatacentersRequest]{c, cachetype.CatalogDatacentersName}
}
// CacheServiceGateways satisfies the proxycfg.ServiceGateways interface by
// sourcing data from the agent cache.
func CacheServiceGateways(c *cache.Cache) proxycfg.GatewayServices {
return &cacheProxyDataSource[*structs.ServiceSpecificRequest]{c, cachetype.ServiceGatewaysName}
}
// CacheHTTPChecks satisifies the proxycfg.HTTPChecks interface by sourcing
// data from the agent cache.
func CacheHTTPChecks(c *cache.Cache) proxycfg.HTTPChecks {
return &cacheProxyDataSource[*cachetype.ServiceHTTPChecksRequest]{c, cachetype.ServiceHTTPChecksName}
}
// CacheIntentionUpstreams satisfies the proxycfg.IntentionUpstreams interface
// by sourcing data from the agent cache.
func CacheIntentionUpstreams(c *cache.Cache) proxycfg.IntentionUpstreams {
return &cacheProxyDataSource[*structs.ServiceSpecificRequest]{c, cachetype.IntentionUpstreamsName}
}
// CacheIntentionUpstreamsDestination satisfies the proxycfg.IntentionUpstreamsDestination interface
// by sourcing data from the agent cache.
func CacheIntentionUpstreamsDestination(c *cache.Cache) proxycfg.IntentionUpstreams {
return &cacheProxyDataSource[*structs.ServiceSpecificRequest]{c, cachetype.IntentionUpstreamsDestinationName}
}
// CacheInternalServiceDump satisfies the proxycfg.InternalServiceDump
// interface by sourcing data from the agent cache.
func CacheInternalServiceDump(c *cache.Cache) proxycfg.InternalServiceDump {
return &cacheProxyDataSource[*structs.ServiceDumpRequest]{c, cachetype.InternalServiceDumpName}
}
// CacheLeafCertificate satisifies the proxycfg.LeafCertificate interface by
// sourcing data from the agent cache.
func CacheLeafCertificate(c *cache.Cache) proxycfg.LeafCertificate {
return &cacheProxyDataSource[*cachetype.ConnectCALeafRequest]{c, cachetype.ConnectCALeafName}
}
// CachePrepraredQuery satisfies the proxycfg.PreparedQuery interface by
// sourcing data from the agent cache.
func CachePrepraredQuery(c *cache.Cache) proxycfg.PreparedQuery {
return &cacheProxyDataSource[*structs.PreparedQueryExecuteRequest]{c, cachetype.PreparedQueryName}
}
// CacheResolvedServiceConfig satisfies the proxycfg.ResolvedServiceConfig
// interface by sourcing data from the agent cache.
func CacheResolvedServiceConfig(c *cache.Cache) proxycfg.ResolvedServiceConfig {
return &cacheProxyDataSource[*structs.ServiceConfigRequest]{c, cachetype.ResolvedServiceConfigName}
}
// cacheProxyDataSource implements a generic wrapper around the agent cache to
// provide data to the proxycfg.Manager.
type cacheProxyDataSource[ReqType cache.Request] struct {
c *cache.Cache
t string
}
// Notify satisfies the interfaces used by proxycfg.Manager to source data by
// subscribing to notifications from the agent cache.
func (c *cacheProxyDataSource[ReqType]) Notify(
ctx context.Context,
req ReqType,
correlationID string,
ch chan<- proxycfg.UpdateEvent,
) error {
return c.c.NotifyCallback(ctx, c.t, req, correlationID, dispatchCacheUpdate(ch))
}
func dispatchCacheUpdate(ch chan<- proxycfg.UpdateEvent) cache.Callback {
return func(ctx context.Context, e cache.UpdateEvent) {
u := proxycfg.UpdateEvent{
CorrelationID: e.CorrelationID,
Result: e.Result,
Err: e.Err,
}
select {
case ch <- u:
case <-ctx.Done():
}
}
}