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Merge pull request #9287 from gyuho/changelog-3.4
CHANGELOG: updates from January/February 2018
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Gyuho Lee
GitHub
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428f8c5b12
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## [v3.2.16](https://github.com/coreos/etcd/releases/tag/v3.2.16) (2018-02-12)
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See [code changes](https://github.com/coreos/etcd/compare/v3.2.15...v3.2.16) and [v3.2 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_2.md) for any breaking changes.
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### Fixed(v3)
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- Fix [`mvcc` "unsynced" watcher restore operation](https://github.com/coreos/etcd/pull/9297).
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- "unsynced" watcher is watcher that needs to be in sync with events that have happened.
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- That is, "unsynced" watcher is the slow watcher that was requested on old revision.
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- "unsynced" watcher restore operation was not correctly populating its underlying watcher group.
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- Which possibly causes missing events from "unsynced" watchers.
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## [v3.2.15](https://github.com/coreos/etcd/releases/tag/v3.2.15) (2018-01-22)
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See [code changes](https://github.com/coreos/etcd/compare/v3.2.14...v3.2.15) and [v3.2 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_2.md) for any breaking changes.
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## [v3.3.1](https://github.com/coreos/etcd/releases/tag/v3.3.1) (2018-02-12)
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See [code changes](https://github.com/coreos/etcd/compare/v3.3.0...v3.3.1) and [v3.3 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_3.md) for any breaking changes.
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### Improved
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- Add [warnings on requests taking too long](https://github.com/coreos/etcd/pull/9288).
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- e.g. `etcdserver: read-only range request "key:\"\\000\" range_end:\"\\000\" " took too long [3.389041388s] to execute`
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### Fixed(v3)
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- Fix [`mvcc` "unsynced" watcher restore operation](https://github.com/coreos/etcd/pull/9281).
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- "unsynced" watcher is watcher that needs to be in sync with events that have happened.
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- That is, "unsynced" watcher is the slow watcher that was requested on old revision.
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- "unsynced" watcher restore operation was not correctly populating its underlying watcher group.
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- Which possibly causes missing events from "unsynced" watchers.
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### Security
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- Compile with [*Go 1.9.4*](https://groups.google.com/forum/#!topic/golang-announce/lGkem2e5WyQ) (v3.3.0 was compiled with Go *1.9.3*).
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## [v3.3.0](https://github.com/coreos/etcd/releases/tag/v3.3.0) (2018-02-01)
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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) for any breaking changes.
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## v3.4.0 (TBD)
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## v3.4.0 (TBD 2018-05-01)
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**v3.4.0 is not yet released.**
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See [code changes](https://github.com/coreos/etcd/compare/v3.3.0...v3.4.0) and [v3.4 upgrade guide](https://github.com/coreos/etcd/blob/master/Documentation/upgrades/upgrade_3_4.md) for any breaking changes.
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### Improved
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- Add [jitter to watch progress notify](https://github.com/coreos/etcd/pull/9278) to prevent [spikes in `etcd_network_client_grpc_sent_bytes_total`](https://github.com/coreos/etcd/issues/9246).
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- Add [warnings on requests taking too long](https://github.com/coreos/etcd/pull/9288).
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- e.g. `etcdserver: read-only range request "key:\"\\000\" range_end:\"\\000\" " took too long [3.389041388s] to execute`
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- Improve [long-running concurrent read transactions under light write workloads](https://github.com/coreos/etcd/pull/9296).
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- Previously, periodic commit on pending writes blocks incoming read transactions, even if there is no pending write.
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- Now, periodic commit operation does not block concurrent read transactions, thus improves long-running read transaction performance.
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### Changed(Breaking Changes)
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@ -24,18 +33,20 @@
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- Now `go get/install/build` on `etcd` packages (e.g. `clientv3`, `tools/benchmark`) enforce builds with etcd `vendor` directory.
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- Reorganize [internal packages](https://github.com/coreos/etcd/issues/9220).
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- `internal/*` packages [cannot be(are not meant to be) imported by external projects](https://docs.google.com/document/d/1e8kOo3r51b2BWtTs_1uADIA5djfXhPT36s6eHVRIvaU/edit).
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- Move `"github.com/coreos/etcd/alarm"` to [`"github.com/coreos/etcd/internal/alarm"`](https://github.com/coreos/etcd/pull/9234).
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- Move `"github.com/coreos/etcd/auth"` to [`"github.com/coreos/etcd/internal/auth"`](https://github.com/coreos/etcd/pull/9243).
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- Move `"github.com/coreos/etcd/compactor"` to [`"github.com/coreos/etcd/internal/compactor"`](https://github.com/coreos/etcd/pull/9234).
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- [`embed.CompactorModePeriodic`](https://github.com/coreos/etcd/pull/9247) to replace `compactor.ModePeriodic`.
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- [`embed.CompactorModeRevision`](https://github.com/coreos/etcd/pull/9247) to replace `compactor.ModeRevision`.
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- Move `"github.com/coreos/etcd/discovery"` to [`"github.com/coreos/etcd/internal/discovery"`](https://github.com/coreos/etcd/pull/9233).
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- Move `"github.com/coreos/etcd/lease"` to [`"github.com/coreos/etcd/internal/lease"`](https://github.com/coreos/etcd/pull/9238).
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- Move `"github.com/coreos/etcd/mvcc"` to [`"github.com/coreos/etcd/internal/mvcc"`](https://github.com/coreos/etcd/pull/9238).
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- Move `"github.com/coreos/etcd/snap"` to [`"github.com/coreos/etcd/internal/raftsnap"`](https://github.com/coreos/etcd/pull/9211).
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- Move `"github.com/coreos/etcd/store"` to [`"github.com/coreos/etcd/internal/store"`](https://github.com/coreos/etcd/pull/9238).
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- Move `"github.com/coreos/etcd/version"` to [`"github.com/coreos/etcd/internal/version"`](https://github.com/coreos/etcd/pull/9244).
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- Move `"github.com/coreos/etcd/etcdserver/auth"` to [`"github.com/coreos/etcd/etcdserver/v2auth"`](https://github.com/coreos/etcd/pull/9275).
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- Move `"github.com/coreos/etcd/alarm"` to [`"github.com/coreos/etcd/internal/alarm"`](https://github.com/coreos/etcd/pull/9234).
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- Move `"github.com/coreos/etcd/auth"` to [`"github.com/coreos/etcd/internal/auth"`](https://github.com/coreos/etcd/pull/9243).
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- Move `"github.com/coreos/etcd/compactor"` to [`"github.com/coreos/etcd/internal/compactor"`](https://github.com/coreos/etcd/pull/9234).
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- [`embed.CompactorModePeriodic`](https://github.com/coreos/etcd/pull/9247) to replace `compactor.ModePeriodic`.
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- [`embed.CompactorModeRevision`](https://github.com/coreos/etcd/pull/9247) to replace `compactor.ModeRevision`.
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- Move `"github.com/coreos/etcd/discovery"` to [`"github.com/coreos/etcd/internal/discovery"`](https://github.com/coreos/etcd/pull/9233).
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- Move `"github.com/coreos/etcd/lease"` to [`"github.com/coreos/etcd/internal/lease"`](https://github.com/coreos/etcd/pull/9238).
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- Move `"github.com/coreos/etcd/mvcc"` to [`"github.com/coreos/etcd/internal/mvcc"`](https://github.com/coreos/etcd/pull/9238).
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- Move `"github.com/coreos/etcd/snap"` to [`"github.com/coreos/etcd/internal/raftsnap"`](https://github.com/coreos/etcd/pull/9211).
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- Move `"github.com/coreos/etcd/store"` to [`"github.com/coreos/etcd/internal/store"`](https://github.com/coreos/etcd/pull/9238).
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- Move `"github.com/coreos/etcd/version"` to [`"github.com/coreos/etcd/internal/version"`](https://github.com/coreos/etcd/pull/9244).
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- Move `"github.com/coreos/etcd/etcdserver/auth"` to [`"github.com/coreos/etcd/etcdserver/v2auth"`](https://github.com/coreos/etcd/pull/9275).
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- Change v3 `etcdctl snapshot` exit codes with [`snapshot` package](https://github.com/coreos/etcd/pull/9118/commits/df689f4280e1cce4b9d61300be13ca604d41670a).
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- Exit on error with exit code 1 (no more exit code 5 or 6 on `snapshot save/restore` commands).
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### Added(`etcd`)
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- Add [`errors` field to `etcdserverpb.StatusResponse`](https://github.com/coreos/etcd/pull/9206) for server-side error.
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- e.g. `"etcdserver: no leader", "NOSPACE", "CORRUPT"`
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- Add [`dbSizeInUse` field to `etcdserverpb.StatusResponse`](https://github.com/coreos/etcd/pull/9256) for actual DB size after compaction.
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- Also exposed as metric `etcd_debugging_mvcc_db_total_size_in_use_in_bytes`
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### Added(v3 `etcdctl`)
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- Add [`check datascale`](https://github.com/coreos/etcd/pull/9185) command.
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- Add ["raft applied index" to `endpoint status`](https://github.com/coreos/etcd/pull/9176).
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- Add ["errors" to `endpoint status`](https://github.com/coreos/etcd/pull/9206).
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- Add ["raft applied index" field to `endpoint status`](https://github.com/coreos/etcd/pull/9176).
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- Add ["errors" field to `endpoint status`](https://github.com/coreos/etcd/pull/9206).
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### Added(metrics)
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- Add [`etcd_debugging_mvcc_db_total_size_in_use_in_bytes`](https://github.com/coreos/etcd/pull/9256) Prometheus metric.
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### Package `raft`
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- Improve [Raft `becomeLeader` and `stepLeader`](https://github.com/coreos/etcd/pull/9073) by keeping track of latest `pb.EntryConfChange` index.
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- Previously record `pendingConf` boolean field scanning the entire tail of the log, which can delay hearbeat send.
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- Fix [deadlock during PreVote migration process](https://github.com/coreos/etcd/pull/8525).
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- Add [`raft.ErrProposalDropped`](https://github.com/coreos/etcd/pull/9067).
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- Now `(r *raft) Step` returns `raft.ErrProposalDropped` if a proposal has been ignored.
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- e.g. a node is removed from cluster, [ongoing leadership transfer](https://github.com/coreos/etcd/issues/8975), etc.
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- Improve [Raft `becomeLeader` and `stepLeader`](https://github.com/coreos/etcd/pull/9073) by keeping track of latest `pb.EntryConfChange` index.
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- Previously record `pendingConf` boolean field scanning the entire tail of the log, which can delay hearbeat send.
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- Fix [missing learner nodes on `(n *node) ApplyConfChange`](https://github.com/coreos/etcd/pull/9116).
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### Fixed(v3)
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- Fix [`mvcc` "unsynced" watcher restore operation](https://github.com/coreos/etcd/pull/9281).
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- "unsynced" watcher is watcher that needs to be in sync with events that have happened.
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- That is, "unsynced" watcher is the slow watcher that was requested on old revision.
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- "unsynced" watcher restore operation was not correctly populating its underlying watcher group.
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- Which possibly causes missing events from "unsynced" watchers.
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