open-consul/go.mod
R.B. Boyer 3804677570
server: suppress spurious blocking query returns where multiple config entries are involved (#12362)
Starting from and extending the mechanism introduced in #12110 we can specially handle the 3 main special Consul RPC endpoints that react to many config entries in a single blocking query in Connect:

- `DiscoveryChain.Get`
- `ConfigEntry.ResolveServiceConfig`
- `Intentions.Match`

All of these will internally watch for many config entries, and at least one of those will likely be not found in any given query. Because these are blends of multiple reads the exact solution from #12110 isn't perfectly aligned, but we can tweak the approach slightly and regain the utility of that mechanism.

### No Config Entries Found

In this case, despite looking for many config entries none may be found at all. Unlike #12110 in this scenario we do not return an empty reply to the caller, but instead synthesize a struct from default values to return. This can be handled nearly identically to #12110 with the first 1-2 replies being non-empty payloads followed by the standard spurious wakeup suppression mechanism from #12110.

### No Change Since Last Wakeup

Once a blocking query loop on the server has completed and slept at least once, there is a further optimization we can make here to detect if any of the config entries that were present at specific versions for the prior execution of the loop are identical for the loop we just woke up for. In that scenario we can return a slightly different internal sentinel error and basically externally handle it similar to #12110.

This would mean that even if 20 discovery chain read RPC handling goroutines wakeup due to the creation of an unrelated config entry, the only ones that will terminate and reply with a blob of data are those that genuinely have new data to report.

### Extra Endpoints

Since this pattern is pretty reusable, other key config-entry-adjacent endpoints used by `agent/proxycfg` also were updated:

- `ConfigEntry.List`
- `Internal.IntentionUpstreams` (tproxy)
2022-02-25 15:46:34 -06:00

106 lines
4.4 KiB
Modula-2

module github.com/hashicorp/consul
go 1.13
replace github.com/hashicorp/consul/api => ./api
replace github.com/hashicorp/consul/sdk => ./sdk
replace launchpad.net/gocheck => github.com/go-check/check v0.0.0-20140225173054-eb6ee6f84d0a
require (
github.com/Microsoft/go-winio v0.4.3 // indirect
github.com/NYTimes/gziphandler v1.0.1
github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e
github.com/armon/go-metrics v0.3.10
github.com/armon/go-radix v1.0.0
github.com/aws/aws-sdk-go v1.42.34
github.com/coredns/coredns v1.1.2
github.com/coreos/go-oidc v2.1.0+incompatible
github.com/digitalocean/godo v1.10.0 // indirect
github.com/docker/go-connections v0.3.0
github.com/elazarl/go-bindata-assetfs v0.0.0-20160803192304-e1a2a7ec64b0
github.com/envoyproxy/go-control-plane v0.9.5
github.com/frankban/quicktest v1.11.0 // indirect
github.com/fsnotify/fsnotify v1.5.1
github.com/gogo/protobuf v1.3.2
github.com/golang/protobuf v1.3.5
github.com/google/go-cmp v0.5.6
github.com/google/go-querystring v1.0.0 // indirect
github.com/google/gofuzz v1.2.0
github.com/google/pprof v0.0.0-20210601050228-01bbb1931b22
github.com/google/tcpproxy v0.0.0-20180808230851-dfa16c61dad2
github.com/grpc-ecosystem/go-grpc-middleware v1.0.0
github.com/hashicorp/consul-net-rpc v0.0.0-20220207223504-4cffceffcd29
github.com/hashicorp/consul/api v1.11.0
github.com/hashicorp/consul/sdk v0.8.0
github.com/hashicorp/go-bexpr v0.1.2
github.com/hashicorp/go-checkpoint v0.5.0
github.com/hashicorp/go-cleanhttp v0.5.1
github.com/hashicorp/go-connlimit v0.3.0
github.com/hashicorp/go-discover v0.0.0-20210818145131-c573d69da192
github.com/hashicorp/go-hclog v0.14.1
github.com/hashicorp/go-memdb v1.3.2
github.com/hashicorp/go-multierror v1.1.1
github.com/hashicorp/go-raftchunking v0.6.2
github.com/hashicorp/go-retryablehttp v0.6.7 // indirect
github.com/hashicorp/go-sockaddr v1.0.2
github.com/hashicorp/go-syslog v1.0.0
github.com/hashicorp/go-uuid v1.0.2
github.com/hashicorp/go-version v1.2.1
github.com/hashicorp/golang-lru v0.5.4
github.com/hashicorp/hcl v1.0.0
github.com/hashicorp/hil v0.0.0-20200423225030-a18a1cd20038
github.com/hashicorp/memberlist v0.3.1
github.com/hashicorp/raft v1.3.5
github.com/hashicorp/raft-autopilot v0.1.5
github.com/hashicorp/raft-boltdb v0.0.0-20211202195631-7d34b9fb3f42 // indirect
github.com/hashicorp/raft-boltdb/v2 v2.2.0
github.com/hashicorp/serf v0.9.7
github.com/hashicorp/vault/api v1.0.5-0.20200717191844-f687267c8086
github.com/hashicorp/vault/sdk v0.1.14-0.20200519221838-e0cfd64bc267
github.com/hashicorp/yamux v0.0.0-20210826001029-26ff87cf9493
github.com/imdario/mergo v0.3.6
github.com/joyent/triton-go v1.7.1-0.20200416154420-6801d15b779f // indirect
github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
github.com/kr/text v0.2.0
github.com/miekg/dns v1.1.41
github.com/mitchellh/cli v1.1.0
github.com/mitchellh/copystructure v1.0.0
github.com/mitchellh/go-testing-interface v1.14.0
github.com/mitchellh/hashstructure v0.0.0-20170609045927-2bca23e0e452
github.com/mitchellh/hashstructure/v2 v2.0.2
github.com/mitchellh/mapstructure v1.4.1
github.com/mitchellh/pointerstructure v1.2.1
github.com/mitchellh/reflectwalk v1.0.1
github.com/patrickmn/go-cache v2.1.0+incompatible
github.com/pierrec/lz4 v2.5.2+incompatible // indirect
github.com/pkg/errors v0.9.1
github.com/pquerna/cachecontrol v0.0.0-20180517163645-1555304b9b35 // indirect
github.com/prometheus/client_golang v1.4.0
github.com/rboyer/safeio v0.2.1
github.com/ryanuber/columnize v2.1.2+incompatible
github.com/shirou/gopsutil/v3 v3.21.10
github.com/stretchr/testify v1.7.0
go.etcd.io/bbolt v1.3.5
go.opencensus.io v0.22.0 // indirect
go.uber.org/goleak v1.1.10
golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a
golang.org/x/net v0.0.0-20211216030914-fe4d6282115f
golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45
golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
golang.org/x/sys v0.0.0-20211013075003-97ac67df715c
golang.org/x/time v0.0.0-20200630173020-3af7569d3a1e
google.golang.org/api v0.9.0 // indirect
google.golang.org/appengine v1.6.0 // indirect
google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55
google.golang.org/grpc v1.25.1
gopkg.in/square/go-jose.v2 v2.5.1
gotest.tools/v3 v3.0.3
k8s.io/api v0.18.2
k8s.io/apimachinery v0.18.2
k8s.io/client-go v0.18.2
)
replace istio.io/gogo-genproto v0.0.0-20190124151557-6d926a6e6feb => github.com/istio/gogo-genproto v0.0.0-20190124151557-6d926a6e6feb