CHANGELOG: add v3.3.0 pre-release

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>
etcd-io · Dec 7, 2017 · b5ad03b · b5ad03b
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+## [v3.3.0](https://github.com/coreos/etcd/releases/tag/v3.3.0) (2018-??-??)
+
+**v3.3.0 is not yet released; expected to be released in January 2018.**
+
+See [code changes](https://github.com/coreos/etcd/compare/v3.2.0...v3.3.0) and [v3.3 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_3.md).
+
+### Improved
+
+- Use [`coreos/bbolt`](https://github.com/coreos/bbolt/releases) to replace [`boltdb/bolt`](https://github.com/boltdb/bolt#project-status).
+  - Fix [etcd database size grows until `mvcc: database space exceeded`](https://github.com/coreos/etcd/issues/8009).
+- [Reduce memory allocation](https://github.com/coreos/etcd/pull/8428) on [Range operations](https://github.com/coreos/etcd/pull/8475).
+- [Rate limit](https://github.com/coreos/etcd/pull/8099) and [randomize](https://github.com/coreos/etcd/pull/8101) lease revoke on restart.
+  - To prevent [spikes in Raft proposal rate](https://github.com/coreos/etcd/issues/8096).
+- Better warning on [mismatched `--initial-cluster`](https://github.com/coreos/etcd/pull/8083) flag.
+
+### Changed(Breaking Changes)
+
+- Require [Go 1.9+](https://github.com/coreos/etcd/issues/6174).
+  - Compile with Go 1.9.2.
+  - Deprecate [`golang.org/x/net/context`](https://github.com/coreos/etcd/pull/8511).
+- Require [`google.golang.org/grpc`](https://github.com/grpc/grpc-go/releases) [**`v1.7.4`**](https://github.com/grpc/grpc-go/releases/tag/v1.7.4):
+  - Deprecate [`metadata.Incoming/OutgoingContext`](https://github.com/coreos/etcd/pull/7896).
+  - Deprecate `grpclog.Logger`, upgrade to [`grpclog.LoggerV2`](https://github.com/coreos/etcd/pull/8533).
+  - Deprecate [`grpc.ErrClientConnTimeout`](https://github.com/coreos/etcd/pull/8505) errors in `clientv3`.
+  - Use [`MaxRecvMsgSize` and `MaxSendMsgSize`](https://github.com/coreos/etcd/pull/8437) to limit message size, in etcd server.
+- Upgrade [`github.com/grpc-ecosystem/grpc-gateway`](https://github.com/grpc-ecosystem/grpc-gateway/releases) `v1.2.2` to `v1.3.0`.
+- Upgrade [`github.com/ugorji/go/codec`](https://github.com/ugorji/go) for v2 `client`.
+  - [Regenerated](https://github.com/coreos/etcd/pull/8721) v2 `client` source code with latest `ugorji/go/codec`.
+- Fix [`/health` endpoint JSON output](https://github.com/coreos/etcd/pull/8312).
+
+### Added(`etcd`)
+
+- Add [`--experimental-enable-v2v3`](https://github.com/coreos/etcd/pull/8407) flag to [emulate v2 API with v3](https://github.com/coreos/etcd/issues/6925).
+- Add [`--experimental-corrupt-check-time`](https://github.com/coreos/etcd/pull/8420) flag to [raise corrupt alarm monitoring](https://github.com/coreos/etcd/issues/7125).
+- Add [`--experimental-initial-corrupt-check`](https://github.com/coreos/etcd/pull/8554) flag to [check database hash before serving client/peer traffic](https://github.com/coreos/etcd/issues/8313).
+- Add [`--peer-require-cn`](https://github.com/coreos/etcd/pull/8616) flag to support [CN-based auth for inter-peer connection](https://github.com/coreos/etcd/issues/8262).
+- Add [`--max-txn-ops`](https://github.com/coreos/etcd/pull/7976) flag to [configure maximum number operations in transaction](https://github.com/coreos/etcd/issues/7826).
+- Add [`--max-request-bytes`](https://github.com/coreos/etcd/pull/7968) flag to [configure maximum client request size](https://github.com/coreos/etcd/issues/7923).
+- Add [`--listen-metrics-urls`](https://github.com/coreos/etcd/pull/8242) flag for additional `/metrics` endpoints.
+  - Pass [additional (non) TLS `/metrics` endpoints for a TLS-enabled cluster](https://github.com/coreos/etcd/pull/8282) (e.g. `--listen-metrics-urls=https://localhost:2378,http://localhost:9379` to serve `/metrics` in secure port 2378 and insecure port 9379).
+  - Useful for [bypassing critical APIs when monitoring etcd](https://github.com/coreos/etcd/issues/8060).
+- Add [`--auto-compaction-mode`](https://github.com/coreos/etcd/pull/8123) flag to [support revision-based compaction](https://github.com/coreos/etcd/issues/8098).
+- Update `--auto-compaction-retention` flag to [accept string values](https://github.com/coreos/etcd/pull/8563) with [finer granularity](https://github.com/coreos/etcd/issues/8503).
+- Add [`--grpc-keepalive-min-time`, `--grpc-keepalive-interval`, `--grpc-keepalive-timeout`](https://github.com/coreos/etcd/pull/8535) flags to configure server-side keepalive policies.
+- Serve [`/health` endpoint as unhealthy](https://github.com/coreos/etcd/pull/8272) when [alarm is raised](https://github.com/coreos/etcd/issues/8207).
+- Provide [error information in `/health`](https://github.com/coreos/etcd/pull/8312).
+- Move [logging setup to embed package](https://github.com/coreos/etcd/pull/8810), disable gRPC server log by default.
+- Use [monotonic time in Go 1.9](https://github.com/coreos/etcd/pull/8507) for `lease` package.
+- Warn on [empty hosts in advertise URLs](https://github.com/coreos/etcd/pull/8384).
+  - Address [advertise client URLs accepts empty hosts](https://github.com/coreos/etcd/issues/8379).
+  - etcd `v3.4` will exit on this error.
+- Warn on [shadowed environment variables](https://github.com/coreos/etcd/pull/8385).
+  - Address [error on shadowed environment variables](https://github.com/coreos/etcd/issues/8380).
+  - etcd `v3.4` will exit on this error.
+
+### Added(API)
+
+- Support [ranges in transaction comparisons](https://github.com/coreos/etcd/pull/8025) for [disconnected linearized reads](https://github.com/coreos/etcd/issues/7924).
+- Add [nested transactions](https://github.com/coreos/etcd/pull/8102) to extend [proxy use cases](https://github.com/coreos/etcd/issues/7857).
+- Add [lease comparison target in transaction](https://github.com/coreos/etcd/pull/8324).
+- Add [lease list](https://github.com/coreos/etcd/pull/8358).
+- Add [hash by revision](https://github.com/coreos/etcd/pull/8263) for [better corruption checking against boltdb](https://github.com/coreos/etcd/issues/8016).
+
+### Added(`etcd/clientv3`)
+
+- Add [health balancer](https://github.com/coreos/etcd/pull/8545) to fix [watch API hangs](https://github.com/coreos/etcd/issues/7247), improve [endpoint switch under network faults](https://github.com/coreos/etcd/issues/7941).
+- [Refactor balancer](https://github.com/coreos/etcd/pull/8840) and add [client-side keepalive pings](https://github.com/coreos/etcd/pull/8199) to handle [network partitions](https://github.com/coreos/etcd/issues/8711).
+- Accept [`Compare_LEASE`](https://github.com/coreos/etcd/pull/8324) in [`clientv3.Compare`](https://godoc.org/github.com/coreos/etcd/clientv3#Compare).
+- Add [`LeaseValue` helper](https://github.com/coreos/etcd/pull/8488) to `Cmp` `LeaseID` values in `Txn`.
+- Add [`MoveLeader`](https://github.com/coreos/etcd/pull/8153) to `Maintenance`.
+- Add [`HashKV`](https://github.com/coreos/etcd/pull/8351) to `Maintenance`.
+- Add [`Leases`](https://github.com/coreos/etcd/pull/8358) to `Lease`.
+- Add [`clientv3/ordering`](https://github.com/coreos/etcd/pull/8092) for enforce [ordering in serialized requests](https://github.com/coreos/etcd/issues/7623).
+
+### Added(v2 `etcdctl`)
+
+- Add [`backup --with-v3`](https://github.com/coreos/etcd/pull/8479) flag.
+
+### Added(v3 `etcdctl`)
+
+- Add [`--discovery-srv`](https://github.com/coreos/etcd/pull/8462) flag.
+- Add [`--keepalive-time`, `--keepalive-timeout`](https://github.com/coreos/etcd/pull/8663) flags.
+- Add [`move-leader`](https://github.com/coreos/etcd/pull/8153) command.
+- Add [`endpoint hashkv`](https://github.com/coreos/etcd/pull/8351) command.
+- Add [`lease list`](https://github.com/coreos/etcd/pull/8358) command.
+- Add [`endpoint --cluster`](https://github.com/coreos/etcd/pull/8143) flag.
+  - Equivalent to [v2 `etcdctl cluster-health](https://github.com/coreos/etcd/issues/8117)
+- Add [`defrag --data-dir`](https://github.com/coreos/etcd/pull/8367) flag.
+- Add [`lock --ttl`](https://github.com/coreos/etcd/pull/8370) flag.
+- Add [`lease keep-alive --once`](https://github.com/coreos/etcd/pull/8775) flag.
+- Support [`watch key -- [exec-command…]`](https://github.com/coreos/etcd/pull/8919).
+  - Equivalent to [v2 `etcdctl exec-watch`](https://github.com/coreos/etcd/issues/8814).
+- Enable [`clientv3.WithRequireLeader(context.Context)` for `watch`](https://github.com/coreos/etcd/pull/8672) command.
+- Make `endpoint health` command terminate with [non-zero exit code on unhealthy status](https://github.com/coreos/etcd/pull/8342).
+- Print [`"del"` instead of `"delete"`](https://github.com/coreos/etcd/pull/8297) in txn interactive mode.
+- Print [`ETCD_INITIAL_ADVERTISE_PEER_URLS` in `member add`](https://github.com/coreos/etcd/pull/8332).
+
+### Added(metrics)
+
+- Add [`etcd --listen-metrics-urls`](https://github.com/coreos/etcd/pull/8242) flag for additional `/metrics` endpoints.
+  - Useful for [bypassing critical APIs when monitoring etcd](https://github.com/coreos/etcd/issues/8060).
+- Add [`etcd_server_version`](https://github.com/coreos/etcd/pull/8960) Prometheus metric.
+  - To replace [Kubernetes `etcd-version-monitor`](https://github.com/coreos/etcd/issues/8948).
+- Add [`etcd_debugging_mvcc_db_compaction_keys_total`](https://github.com/coreos/etcd/pull/8280) Prometheus metric.
+- Add [`etcd_debugging_server_lease_expired_total`](https://github.com/coreos/etcd/pull/8064) Prometheus metric.
+  - To improve [lease revoke monitoring](https://github.com/coreos/etcd/issues/8050).
+- Document [Prometheus 2.0 rules](https://github.com/coreos/etcd/pull/8879).
+- Initialize gRPC server [metrics with zero values](https://github.com/coreos/etcd/pull/8878).
+
+### Added(`grpc-proxy`)
+
+- Add [`--experimental-leasing-prefix`](https://github.com/coreos/etcd/pull/8341) flag:
+  - For disconnected linearized reads.
+  - Based on [V system leasing](https://github.com/coreos/etcd/issues/6065).
+  - See ["Disconnected consistent reads with etcd" blog post](https://coreos.com/blog/coreos-labs-disconnected-consistent-reads-with-etcd).
+- Add [`--experimental-serializable-ordering`](https://github.com/coreos/etcd/pull/8315) flag.
+  - To ensure serializable reads have monotonically increasing store revisions across endpoints.
+- Add [`--metrics-addr`](https://github.com/coreos/etcd/pull/8242) for an additional `/metrics` endpoint.
+  - Set `--metrics-addr=http://[HOST]:9379` to serve `/metrics` in insecure port 9379.
+- Serve [`/health` endpoint in grpc-proxy](https://github.com/coreos/etcd/pull/8322).
+
+### Added(gRPC gateway)
+
+- Replace [gRPC gateway](https://github.com/grpc-ecosystem/grpc-gateway) endpoint with [`/v3beta`](https://github.com/coreos/etcd/pull/8880).
+  - To deprecate [`/v3alpha`](https://github.com/coreos/etcd/issues/8125) in `v3.4`.
+- Support ["authorization" token](https://github.com/coreos/etcd/pull/7999).
+- Support [websocket for bi-directional streams](https://github.com/coreos/etcd/pull/8257).
+  - Fix [`Watch` API with gRPC gateway](https://github.com/coreos/etcd/issues/8237).
+- Upgrade gRPC gateway to [v1.3.0](https://github.com/coreos/etcd/issues/8838).
+
+### Added(`etcd/raft`)
+
+- Add [non-voting member](https://github.com/coreos/etcd/pull/8751).
+  - To implement [Raft thesis 4.2.1 Catching up new servers](https://github.com/coreos/etcd/issues/8568).
+  - `Learner` node does not vote or promote itself.
+
+### Added/Fixed(Security/Auth)
+
+- Document [TLS authentication changes](https://github.com/coreos/etcd/pull/8895):
+  - [Server accepts connections if IP matches, without checking DNS entries](https://github.com/coreos/etcd/pull/8223). For instance, if peer cert contains IP addresses and DNS names in Subject Alternative Name (SAN) field, and the remote IP address matches one of those IP addresses, server just accepts connection without further checking the DNS names.
+  - [Server supports reverse-lookup on wildcard DNS `SAN`](https://github.com/coreos/etcd/pull/8281). For instance, if peer cert contains only DNS names (no IP addresses) in Subject Alternative Name (SAN) field, server first reverse-lookups the remote IP address to get a list of names mapping to that address (e.g. `nslookup IPADDR`). Then accepts the connection if those names have a matching name with peer cert's DNS names (either by exact or wildcard match). If none is matched, server forward-lookups each DNS entry in peer cert (e.g. look up `example.default.svc` when the entry is `*.example.default.svc`), and accepts connection only when the host's resolved addresses have the matching IP address with the peer's remote IP address.
+  - Add [CRL based connection rejection](https://github.com/coreos/etcd/pull/8124) to manage [revoked certs](https://github.com/coreos/etcd/issues/4034).
+- Add [`etcd --peer-require-cn`](https://github.com/coreos/etcd/pull/8616) flag.
+  - To support [CommonName(CN) based auth](https://github.com/coreos/etcd/issues/8262) for inter peer connection.
+- [Swap priority](https://github.com/coreos/etcd/pull/8594) of cert CommonName(CN) and username + password.
+  - To address ["username and password specified in the request should take priority over CN in the cert"](https://github.com/coreos/etcd/issues/8584).
+- Protect [lease revoke with auth](https://github.com/coreos/etcd/pull/8031).
+- Provide user's role on [auth permission error](https://github.com/coreos/etcd/pull/8164).
+- Fix [auth store panic with disabled token](https://github.com/coreos/etcd/pull/8695).
+- Update `golang.org/x/crypto/bcrypt` (see [golang/crypto@6c586e1](https://github.com/golang/crypto/commit/6c586e17d90a7d08bbbc4069984180dce3b04117)).
+
+### Fixed(v2)
+
+- [Fail-over v2 client](https://github.com/coreos/etcd/pull/8519) to next endpoint on [oneshot failure](https://github.com/coreos/etcd/issues/8515).
+- [Put back `/v2/machines`](https://github.com/coreos/etcd/pull/8062) endpoint for python-etcd wrapper.
+
+### Fixed(v3)
+
+- Fix [range/put/delete operation metrics](https://github.com/coreos/etcd/pull/8054) with transaction:
+  - `etcd_debugging_mvcc_range_total`
+  - `etcd_debugging_mvcc_put_total`
+  - `etcd_debugging_mvcc_delete_total`
+  - `etcd_debugging_mvcc_txn_total`
+- Fix [`etcd_debugging_mvcc_keys_total`](https://github.com/coreos/etcd/pull/8390) on restore.
+- Fix [`etcd_debugging_mvcc_db_total_size_in_bytes`](https://github.com/coreos/etcd/pull/8120) on restore.
+  - Also change to [`prometheus.NewGaugeFunc`](https://github.com/coreos/etcd/pull/8150).
+- Fix [backend database in-memory index corruption](https://github.com/coreos/etcd/pull/8127) issue on restore (only 3.2.0 is affected).
+- Fix [watch restore from snapshot](https://github.com/coreos/etcd/pull/8427).
+- Fix ["put at-most-once" in `clientv3`](https://github.com/coreos/etcd/pull/8335).
+- Handle [empty key permission](https://github.com/coreos/etcd/pull/8514) in `etcdctl`.
+- [Fix server crash](https://github.com/coreos/etcd/pull/8010) on [invalid transaction request from gRPC gateway](https://github.com/coreos/etcd/issues/7889).
+- Fix [`clientv3.WatchResponse.Canceled`](https://github.com/coreos/etcd/pull/8283) on [compacted watch request](https://github.com/coreos/etcd/issues/8231).
+- Handle [WAL renaming failure on Windows](https://github.com/coreos/etcd/pull/8286).
+- Make [peer dial timeout longer](https://github.com/coreos/etcd/pull/8599).
+  - See [coreos/etcd-operator#1300](https://github.com/coreos/etcd-operator/issues/1300) for more detail.
+- Make server [wait up to request time-out](https://github.com/coreos/etcd/pull/8267) with [pending RPCs](https://github.com/coreos/etcd/issues/8224).
+- Fix [`grpc.Server` panic on `GracefulShutdown`](https://github.com/coreos/etcd/pull/8987) with [TLS-enabled server](https://github.com/coreos/etcd/issues/8916)
+- Fix ["multiple peer URLs cannot start" issue](https://github.com/coreos/etcd/issues/8383).
+- Fix server-side auth so [concurrent auth operations do not return old revision error](https://github.com/coreos/etcd/pull/8442).
+- Fix [`concurrency/stm` `Put` with serializable snapshot](https://github.com/coreos/etcd/pull/8439).
+  - Use store revision from first fetch to resolve write conflicts instead of modified revision.
+- Fix [`grpc-proxy` Snapshot API error handling](https://github.com/coreos/etcd/commit/dbd16d52fbf81e5fd806d21ff5e9148d5bf203ab).
+- Fix [`grpc-proxy` KV API `PrevKv` flag handling](https://github.com/coreos/etcd/pull/8366).
+- Fix [`grpc-proxy` KV API `KeysOnly` flag handling](https://github.com/coreos/etcd/pull/8552).
+- Upgrade [`coreos/go-systemd`](https://github.com/coreos/go-systemd/releases) to `v15` (see https://github.com/coreos/go-systemd/releases/tag/v15).
+
+### Other
+
+- Support previous two minor versions (see our [new release policy](https://github.com/coreos/etcd/pull/8805)).
+- `v3.3.x` is the last release cycle that supports `ACI`:
+  - AppC was [officially suspended](https://github.com/appc/spec#-disclaimer-), as of late 2016.
+  - [`acbuild`](https://github.com/containers/build#this-project-is-currently-unmaintained) is not maintained anymore.
+  - `*.aci` files won't be available from etcd `v3.4` release.
+
+
 ## [v3.2.11](https://github.com/coreos/etcd/releases/tag/v3.2.11) (2017-12-05)
 
 See [code changes](https://github.com/coreos/etcd/compare/v3.2.10...v3.2.11).