mirror of https://github.com/hashicorp/consul
105 lines
3.5 KiB
Go
105 lines
3.5 KiB
Go
// Copyright (c) HashiCorp, Inc.
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// SPDX-License-Identifier: BUSL-1.1
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package proxycfgglue
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import (
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"context"
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"fmt"
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"github.com/hashicorp/go-bexpr"
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"github.com/hashicorp/go-memdb"
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"github.com/hashicorp/consul/agent/cache"
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cachetype "github.com/hashicorp/consul/agent/cache-types"
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"github.com/hashicorp/consul/agent/consul/watch"
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"github.com/hashicorp/consul/agent/proxycfg"
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"github.com/hashicorp/consul/agent/structs"
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"github.com/hashicorp/consul/agent/structs/aclfilter"
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)
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// CacheInternalServiceDump satisfies the proxycfg.InternalServiceDump
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// interface by sourcing data from the agent cache.
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func CacheInternalServiceDump(c *cache.Cache) proxycfg.InternalServiceDump {
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return &cacheInternalServiceDump{c}
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}
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// cacheInternalServiceDump wraps the underlying cache-type to return a simpler
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// subset of the response (as this is all we use in proxycfg).
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type cacheInternalServiceDump struct {
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c *cache.Cache
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}
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func (c *cacheInternalServiceDump) Notify(ctx context.Context, req *structs.ServiceDumpRequest, correlationID string, ch chan<- proxycfg.UpdateEvent) error {
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dispatch := dispatchCacheUpdate(ch)
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return c.c.NotifyCallback(ctx, cachetype.InternalServiceDumpName, req, correlationID,
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func(ctx context.Context, event cache.UpdateEvent) {
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if r, _ := event.Result.(*structs.IndexedNodesWithGateways); r != nil {
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event.Result = &structs.IndexedCheckServiceNodes{
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Nodes: r.Nodes,
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QueryMeta: r.QueryMeta,
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}
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}
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dispatch(ctx, event)
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})
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}
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// ServerInternalServiceDump satisfies the proxycfg.InternalServiceDump
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// interface by sourcing data from a blocking query against the server's
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// state store.
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func ServerInternalServiceDump(deps ServerDataSourceDeps, remoteSource proxycfg.InternalServiceDump) proxycfg.InternalServiceDump {
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return &serverInternalServiceDump{deps, remoteSource}
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}
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type serverInternalServiceDump struct {
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deps ServerDataSourceDeps
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remoteSource proxycfg.InternalServiceDump
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}
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func (s *serverInternalServiceDump) Notify(ctx context.Context, req *structs.ServiceDumpRequest, correlationID string, ch chan<- proxycfg.UpdateEvent) error {
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if req.Datacenter != s.deps.Datacenter {
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return s.remoteSource.Notify(ctx, req, correlationID, ch)
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}
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filter, err := bexpr.CreateFilter(req.Filter, nil, structs.CheckServiceNodes{})
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if err != nil {
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return err
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}
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// This is just the small subset of the Internal.ServiceDump RPC handler used
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// by proxycfg.
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return watch.ServerLocalNotify(ctx, correlationID, s.deps.GetStore,
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func(ws memdb.WatchSet, store Store) (uint64, *structs.IndexedCheckServiceNodes, error) {
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authz, err := s.deps.ACLResolver.ResolveTokenAndDefaultMeta(req.Token, &req.EnterpriseMeta, nil)
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if err != nil {
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return 0, nil, err
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}
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idx, nodes, err := store.ServiceDump(ws, req.ServiceKind, req.UseServiceKind, &req.EnterpriseMeta, req.PeerName)
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if err != nil {
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return 0, nil, err
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}
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totalNodeLength := len(nodes)
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aclfilter.New(authz, s.deps.Logger).Filter(&nodes)
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raw, err := filter.Execute(nodes)
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if err != nil {
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return 0, nil, fmt.Errorf("could not filter local service dump: %w", err)
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}
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nodes = raw.(structs.CheckServiceNodes)
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return idx, &structs.IndexedCheckServiceNodes{
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Nodes: nodes,
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QueryMeta: structs.QueryMeta{
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Index: idx,
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Backend: structs.QueryBackendBlocking,
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ResultsFilteredByACLs: totalNodeLength != len(nodes),
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},
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}, nil
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},
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dispatchBlockingQueryUpdate[*structs.IndexedCheckServiceNodes](ch),
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)
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}
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