589 lines
18 KiB
Go
589 lines
18 KiB
Go
package consul
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import (
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"fmt"
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"time"
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metrics "github.com/armon/go-metrics"
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"github.com/armon/go-metrics/prometheus"
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"github.com/hashicorp/go-hclog"
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memdb "github.com/hashicorp/go-memdb"
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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/consul/state"
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"github.com/hashicorp/consul/agent/structs"
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)
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var ConfigSummaries = []prometheus.SummaryDefinition{
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{
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Name: []string{"config_entry", "apply"},
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Help: "",
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},
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{
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Name: []string{"config_entry", "get"},
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Help: "",
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},
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{
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Name: []string{"config_entry", "list"},
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Help: "",
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},
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{
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Name: []string{"config_entry", "listAll"},
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Help: "",
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},
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{
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Name: []string{"config_entry", "delete"},
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Help: "",
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},
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{
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Name: []string{"config_entry", "resolve_service_config"},
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Help: "",
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},
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}
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// The ConfigEntry endpoint is used to query centralized config information
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type ConfigEntry struct {
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srv *Server
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logger hclog.Logger
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}
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// Apply does an upsert of the given config entry.
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func (c *ConfigEntry) Apply(args *structs.ConfigEntryRequest, reply *bool) error {
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if err := c.srv.validateEnterpriseRequest(args.Entry.GetEnterpriseMeta(), true); err != nil {
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return err
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}
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// Ensure that all config entry writes go to the primary datacenter. These will then
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// be replicated to all the other datacenters.
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args.Datacenter = c.srv.config.PrimaryDatacenter
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if done, err := c.srv.ForwardRPC("ConfigEntry.Apply", args, args, reply); done {
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return err
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}
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defer metrics.MeasureSince([]string{"config_entry", "apply"}, time.Now())
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entMeta := args.Entry.GetEnterpriseMeta()
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authz, err := c.srv.ResolveTokenAndDefaultMeta(args.Token, entMeta, nil)
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if err != nil {
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return err
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}
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if err := c.preflightCheck(args.Entry.GetKind()); err != nil {
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return err
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}
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// Normalize and validate the incoming config entry as if it came from a user.
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if err := args.Entry.Normalize(); err != nil {
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return err
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}
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if err := args.Entry.Validate(); err != nil {
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return err
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}
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if authz != nil && !args.Entry.CanWrite(authz) {
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return acl.ErrPermissionDenied
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}
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if args.Op != structs.ConfigEntryUpsert && args.Op != structs.ConfigEntryUpsertCAS {
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args.Op = structs.ConfigEntryUpsert
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}
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resp, err := c.srv.raftApply(structs.ConfigEntryRequestType, args)
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if err != nil {
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return err
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}
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if respErr, ok := resp.(error); ok {
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return respErr
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}
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if respBool, ok := resp.(bool); ok {
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*reply = respBool
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}
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return nil
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}
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// Get returns a single config entry by Kind/Name.
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func (c *ConfigEntry) Get(args *structs.ConfigEntryQuery, reply *structs.ConfigEntryResponse) error {
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if err := c.srv.validateEnterpriseRequest(&args.EnterpriseMeta, false); err != nil {
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return err
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}
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if done, err := c.srv.ForwardRPC("ConfigEntry.Get", args, args, reply); done {
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return err
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}
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defer metrics.MeasureSince([]string{"config_entry", "get"}, time.Now())
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authz, err := c.srv.ResolveTokenAndDefaultMeta(args.Token, &args.EnterpriseMeta, nil)
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if err != nil {
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return err
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}
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// Create a dummy config entry to check the ACL permissions.
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lookupEntry, err := structs.MakeConfigEntry(args.Kind, args.Name)
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if err != nil {
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return err
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}
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lookupEntry.GetEnterpriseMeta().Merge(&args.EnterpriseMeta)
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if authz != nil && !lookupEntry.CanRead(authz) {
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return acl.ErrPermissionDenied
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}
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return c.srv.blockingQuery(
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&args.QueryOptions,
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&reply.QueryMeta,
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func(ws memdb.WatchSet, state *state.Store) error {
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index, entry, err := state.ConfigEntry(ws, args.Kind, args.Name, &args.EnterpriseMeta)
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if err != nil {
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return err
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}
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reply.Index = index
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if entry == nil {
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return nil
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}
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reply.Entry = entry
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return nil
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})
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}
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// List returns all the config entries of the given kind. If Kind is blank,
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// all existing config entries will be returned.
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func (c *ConfigEntry) List(args *structs.ConfigEntryQuery, reply *structs.IndexedConfigEntries) error {
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if err := c.srv.validateEnterpriseRequest(&args.EnterpriseMeta, false); err != nil {
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return err
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}
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if done, err := c.srv.ForwardRPC("ConfigEntry.List", args, args, reply); done {
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return err
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}
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defer metrics.MeasureSince([]string{"config_entry", "list"}, time.Now())
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authz, err := c.srv.ResolveTokenAndDefaultMeta(args.Token, &args.EnterpriseMeta, nil)
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if err != nil {
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return err
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}
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if args.Kind != "" && !structs.ValidateConfigEntryKind(args.Kind) {
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return fmt.Errorf("invalid config entry kind: %s", args.Kind)
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}
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return c.srv.blockingQuery(
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&args.QueryOptions,
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&reply.QueryMeta,
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func(ws memdb.WatchSet, state *state.Store) error {
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index, entries, err := state.ConfigEntriesByKind(ws, args.Kind, &args.EnterpriseMeta)
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if err != nil {
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return err
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}
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// Filter the entries returned by ACL permissions.
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filteredEntries := make([]structs.ConfigEntry, 0, len(entries))
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for _, entry := range entries {
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if authz != nil && !entry.CanRead(authz) {
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continue
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}
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filteredEntries = append(filteredEntries, entry)
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}
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reply.Kind = args.Kind
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reply.Index = index
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reply.Entries = filteredEntries
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return nil
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})
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}
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var configEntryKindsFromConsul_1_8_0 = []string{
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structs.ServiceDefaults,
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structs.ProxyDefaults,
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structs.ServiceRouter,
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structs.ServiceSplitter,
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structs.ServiceResolver,
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structs.IngressGateway,
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structs.TerminatingGateway,
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}
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// ListAll returns all the known configuration entries
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func (c *ConfigEntry) ListAll(args *structs.ConfigEntryListAllRequest, reply *structs.IndexedGenericConfigEntries) error {
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if err := c.srv.validateEnterpriseRequest(&args.EnterpriseMeta, false); err != nil {
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return err
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}
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if done, err := c.srv.ForwardRPC("ConfigEntry.ListAll", args, args, reply); done {
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return err
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}
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defer metrics.MeasureSince([]string{"config_entry", "listAll"}, time.Now())
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authz, err := c.srv.ResolveTokenAndDefaultMeta(args.Token, &args.EnterpriseMeta, nil)
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if err != nil {
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return err
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}
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if len(args.Kinds) == 0 {
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args.Kinds = configEntryKindsFromConsul_1_8_0
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}
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kindMap := make(map[string]struct{})
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for _, kind := range args.Kinds {
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kindMap[kind] = struct{}{}
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}
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return c.srv.blockingQuery(
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&args.QueryOptions,
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&reply.QueryMeta,
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func(ws memdb.WatchSet, state *state.Store) error {
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index, entries, err := state.ConfigEntries(ws, &args.EnterpriseMeta)
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if err != nil {
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return err
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}
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// Filter the entries returned by ACL permissions or by the provided kinds.
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filteredEntries := make([]structs.ConfigEntry, 0, len(entries))
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for _, entry := range entries {
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if authz != nil && !entry.CanRead(authz) {
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continue
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}
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// Doing this filter outside of memdb isn't terribly
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// performant. This kind filter is currently only used across
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// version upgrades, so in the common case we are going to
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// always return all of the data anyway, so it should be fine.
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// If that changes at some point, then we should move this down
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// into memdb.
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if _, ok := kindMap[entry.GetKind()]; !ok {
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continue
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}
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filteredEntries = append(filteredEntries, entry)
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}
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reply.Entries = filteredEntries
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reply.Index = index
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return nil
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})
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}
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// Delete deletes a config entry.
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func (c *ConfigEntry) Delete(args *structs.ConfigEntryRequest, reply *struct{}) error {
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if err := c.srv.validateEnterpriseRequest(args.Entry.GetEnterpriseMeta(), true); err != nil {
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return err
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}
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// Ensure that all config entry writes go to the primary datacenter. These will then
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// be replicated to all the other datacenters.
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args.Datacenter = c.srv.config.PrimaryDatacenter
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if done, err := c.srv.ForwardRPC("ConfigEntry.Delete", args, args, reply); done {
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return err
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}
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defer metrics.MeasureSince([]string{"config_entry", "delete"}, time.Now())
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authz, err := c.srv.ResolveTokenAndDefaultMeta(args.Token, args.Entry.GetEnterpriseMeta(), nil)
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if err != nil {
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return err
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}
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if err := c.preflightCheck(args.Entry.GetKind()); err != nil {
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return err
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}
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// Normalize the incoming entry.
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if err := args.Entry.Normalize(); err != nil {
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return err
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}
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if authz != nil && !args.Entry.CanWrite(authz) {
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return acl.ErrPermissionDenied
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}
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args.Op = structs.ConfigEntryDelete
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resp, err := c.srv.raftApply(structs.ConfigEntryRequestType, args)
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if err != nil {
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return err
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}
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if respErr, ok := resp.(error); ok {
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return respErr
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}
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return nil
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}
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// ResolveServiceConfig
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func (c *ConfigEntry) ResolveServiceConfig(args *structs.ServiceConfigRequest, reply *structs.ServiceConfigResponse) error {
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if err := c.srv.validateEnterpriseRequest(&args.EnterpriseMeta, false); err != nil {
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return err
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}
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if done, err := c.srv.ForwardRPC("ConfigEntry.ResolveServiceConfig", args, args, reply); done {
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return err
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}
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defer metrics.MeasureSince([]string{"config_entry", "resolve_service_config"}, time.Now())
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var authzContext acl.AuthorizerContext
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authz, err := c.srv.ResolveTokenAndDefaultMeta(args.Token, &args.EnterpriseMeta, &authzContext)
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if err != nil {
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return err
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}
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if authz != nil && authz.ServiceRead(args.Name, &authzContext) != acl.Allow {
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return acl.ErrPermissionDenied
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}
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return c.srv.blockingQuery(
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&args.QueryOptions,
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&reply.QueryMeta,
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func(ws memdb.WatchSet, state *state.Store) error {
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reply.Reset()
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reply.MeshGateway.Mode = structs.MeshGatewayModeDefault
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// TODO(freddy) Refactor this into smaller set of state store functions
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// Pass the WatchSet to both the service and proxy config lookups. If either is updated during the
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// blocking query, this function will be rerun and these state store lookups will both be current.
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// We use the default enterprise meta to look up the global proxy defaults because they are not namespaced.
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_, proxyEntry, err := state.ConfigEntry(ws, structs.ProxyDefaults, structs.ProxyConfigGlobal, structs.DefaultEnterpriseMeta())
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if err != nil {
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return err
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}
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var (
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proxyConf *structs.ProxyConfigEntry
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proxyConfGlobalProtocol string
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ok bool
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)
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if proxyEntry != nil {
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proxyConf, ok = proxyEntry.(*structs.ProxyConfigEntry)
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if !ok {
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return fmt.Errorf("invalid proxy config type %T", proxyEntry)
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}
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// Apply the proxy defaults to the sidecar's proxy config
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mapCopy, err := copystructure.Copy(proxyConf.Config)
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if err != nil {
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return fmt.Errorf("failed to copy global proxy-defaults: %v", err)
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}
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reply.ProxyConfig = mapCopy.(map[string]interface{})
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reply.Mode = proxyConf.Mode
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reply.TransparentProxy = proxyConf.TransparentProxy
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reply.MeshGateway = proxyConf.MeshGateway
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reply.Expose = proxyConf.Expose
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// Extract the global protocol from proxyConf for upstream configs.
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rawProtocol := proxyConf.Config["protocol"]
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if rawProtocol != nil {
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proxyConfGlobalProtocol, ok = rawProtocol.(string)
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if !ok {
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return fmt.Errorf("invalid protocol type %T", rawProtocol)
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}
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}
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}
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index, serviceEntry, err := state.ConfigEntry(ws, structs.ServiceDefaults, args.Name, &args.EnterpriseMeta)
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if err != nil {
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return err
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}
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reply.Index = index
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var serviceConf *structs.ServiceConfigEntry
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if serviceEntry != nil {
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serviceConf, ok = serviceEntry.(*structs.ServiceConfigEntry)
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if !ok {
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return fmt.Errorf("invalid service config type %T", serviceEntry)
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}
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if serviceConf.Expose.Checks {
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reply.Expose.Checks = true
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}
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if len(serviceConf.Expose.Paths) >= 1 {
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reply.Expose.Paths = serviceConf.Expose.Paths
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}
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if serviceConf.MeshGateway.Mode != structs.MeshGatewayModeDefault {
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reply.MeshGateway.Mode = serviceConf.MeshGateway.Mode
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}
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if serviceConf.Protocol != "" {
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if reply.ProxyConfig == nil {
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reply.ProxyConfig = make(map[string]interface{})
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}
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reply.ProxyConfig["protocol"] = serviceConf.Protocol
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}
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if serviceConf.TransparentProxy.OutboundListenerPort != 0 {
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reply.TransparentProxy.OutboundListenerPort = serviceConf.TransparentProxy.OutboundListenerPort
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}
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if serviceConf.Mode != structs.ProxyModeDefault {
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reply.Mode = serviceConf.Mode
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}
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}
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// First collect all upstreams into a set of seen upstreams.
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// Upstreams can come from:
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// - Explicitly from proxy registrations, and therefore as an argument to this RPC endpoint
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// - Implicitly from centralized upstream config in service-defaults
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seenUpstreams := map[structs.ServiceID]struct{}{}
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upstreamIDs := args.UpstreamIDs
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legacyUpstreams := false
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var (
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noUpstreamArgs = len(upstreamIDs) == 0 && len(args.Upstreams) == 0
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// Check the args and the resolved value. If it was exclusively set via a config entry, then args.Mode
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// will never be transparent because the service config request does not use the resolved value.
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tproxy = args.Mode == structs.ProxyModeTransparent || reply.Mode == structs.ProxyModeTransparent
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)
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// The upstreams passed as arguments to this endpoint are the upstreams explicitly defined in a proxy registration.
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// If no upstreams were passed, then we should only returned the resolved config if the proxy in transparent mode.
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// Otherwise we would return a resolved upstream config to a proxy with no configured upstreams.
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if noUpstreamArgs && !tproxy {
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return nil
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}
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// The request is considered legacy if the deprecated args.Upstream was used
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if len(upstreamIDs) == 0 && len(args.Upstreams) > 0 {
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legacyUpstreams = true
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upstreamIDs = make([]structs.ServiceID, 0)
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for _, upstream := range args.Upstreams {
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// Before Consul namespaces were released, the Upstreams provided to the endpoint did not contain the namespace.
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// Because of this we attach the enterprise meta of the request, which will just be the default namespace.
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sid := structs.NewServiceID(upstream, &args.EnterpriseMeta)
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upstreamIDs = append(upstreamIDs, sid)
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}
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}
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// First store all upstreams that were provided in the request
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for _, sid := range upstreamIDs {
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if _, ok := seenUpstreams[sid]; !ok {
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seenUpstreams[sid] = struct{}{}
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}
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}
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// Then store upstreams inferred from service-defaults and mapify the overrides.
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var (
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upstreamConfigs = make(map[structs.ServiceID]*structs.UpstreamConfig)
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upstreamDefaults *structs.UpstreamConfig
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// usConfigs stores the opaque config map for each upstream and is keyed on the upstream's ID.
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usConfigs = make(map[structs.ServiceID]map[string]interface{})
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)
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if serviceConf != nil && serviceConf.UpstreamConfig != nil {
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for i, override := range serviceConf.UpstreamConfig.Overrides {
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if override.Name == "" {
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c.logger.Warn(
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"Skipping UpstreamConfig.Overrides entry without a required name field",
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"entryIndex", i,
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"kind", serviceConf.GetKind(),
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"name", serviceConf.GetName(),
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"namespace", serviceConf.GetEnterpriseMeta().NamespaceOrEmpty(),
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)
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continue // skip this impossible condition
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}
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seenUpstreams[override.ServiceID()] = struct{}{}
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upstreamConfigs[override.ServiceID()] = override
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}
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if serviceConf.UpstreamConfig.Defaults != nil {
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upstreamDefaults = serviceConf.UpstreamConfig.Defaults
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// Store the upstream defaults under a wildcard key so that they can be applied to
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// upstreams that are inferred from intentions and do not have explicit upstream configuration.
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cfgMap := make(map[string]interface{})
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upstreamDefaults.MergeInto(cfgMap)
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wildcard := structs.NewServiceID(structs.WildcardSpecifier, structs.WildcardEnterpriseMeta())
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usConfigs[wildcard] = cfgMap
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}
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}
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for upstream := range seenUpstreams {
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resolvedCfg := make(map[string]interface{})
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// The protocol of an upstream is resolved in this order:
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// 1. Default protocol from proxy-defaults (how all services should be addressed)
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// 2. Protocol for upstream service defined in its service-defaults (how the upstream wants to be addressed)
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// 3. Protocol defined for the upstream in the service-defaults.(upstream_config.defaults|upstream_config.overrides) of the downstream
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// (how the downstream wants to address it)
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protocol := proxyConfGlobalProtocol
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_, upstreamSvcDefaults, err := state.ConfigEntry(ws, structs.ServiceDefaults, upstream.ID, &upstream.EnterpriseMeta)
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if err != nil {
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return err
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}
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if upstreamSvcDefaults != nil {
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cfg, ok := upstreamSvcDefaults.(*structs.ServiceConfigEntry)
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if !ok {
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return fmt.Errorf("invalid service config type %T", upstreamSvcDefaults)
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}
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if cfg.Protocol != "" {
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protocol = cfg.Protocol
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}
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}
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if protocol != "" {
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resolvedCfg["protocol"] = protocol
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}
|
|
|
|
// Merge centralized defaults for all upstreams before configuration for specific upstreams
|
|
if upstreamDefaults != nil {
|
|
upstreamDefaults.MergeInto(resolvedCfg)
|
|
}
|
|
|
|
// The MeshGateway value from the proxy registration overrides the one from upstream_defaults
|
|
// because it is specific to the proxy instance.
|
|
//
|
|
// The goal is to flatten the mesh gateway mode in this order:
|
|
// 0. Value from centralized upstream_defaults
|
|
// 1. Value from local proxy registration
|
|
// 2. Value from centralized upstream_config
|
|
// 3. Value from local upstream definition. This last step is done in the client's service manager.
|
|
if !args.MeshGateway.IsZero() {
|
|
resolvedCfg["mesh_gateway"] = args.MeshGateway
|
|
}
|
|
|
|
if upstreamConfigs[upstream] != nil {
|
|
upstreamConfigs[upstream].MergeInto(resolvedCfg)
|
|
}
|
|
|
|
if len(resolvedCfg) > 0 {
|
|
usConfigs[upstream] = resolvedCfg
|
|
}
|
|
}
|
|
|
|
// don't allocate the slices just to not fill them
|
|
if len(usConfigs) == 0 {
|
|
return nil
|
|
}
|
|
|
|
if legacyUpstreams {
|
|
// For legacy upstreams we return a map that is only keyed on the string ID, since they precede namespaces
|
|
reply.UpstreamConfigs = make(map[string]map[string]interface{})
|
|
|
|
for us, conf := range usConfigs {
|
|
reply.UpstreamConfigs[us.ID] = conf
|
|
}
|
|
|
|
} else {
|
|
reply.UpstreamIDConfigs = make(structs.OpaqueUpstreamConfigs, 0, len(usConfigs))
|
|
|
|
for us, conf := range usConfigs {
|
|
reply.UpstreamIDConfigs = append(reply.UpstreamIDConfigs,
|
|
structs.OpaqueUpstreamConfig{Upstream: us, Config: conf})
|
|
}
|
|
}
|
|
return nil
|
|
})
|
|
}
|
|
|
|
// preflightCheck is meant to have kind-specific system validation outside of
|
|
// content validation. The initial use case is restricting the ability to do
|
|
// writes of service-intentions until the system is finished migration.
|
|
func (c *ConfigEntry) preflightCheck(kind string) error {
|
|
switch kind {
|
|
case structs.ServiceIntentions:
|
|
// Exit early if Connect hasn't been enabled.
|
|
if !c.srv.config.ConnectEnabled {
|
|
return ErrConnectNotEnabled
|
|
}
|
|
|
|
usingConfigEntries, err := c.srv.fsm.State().AreIntentionsInConfigEntries()
|
|
if err != nil {
|
|
return fmt.Errorf("system metadata lookup failed: %v", err)
|
|
}
|
|
if !usingConfigEntries {
|
|
return ErrIntentionsNotUpgradedYet
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|