73 lines
5.5 KiB
Markdown
73 lines
5.5 KiB
Markdown
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## v3.4.0 (TBD)
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**v3.4.0 is not yet released.**
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### Changed(Breaking Changes)
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- Drop [ACIs from official release](https://github.com/coreos/etcd/pull/9059).
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- [AppC was officially suspended](https://github.com/appc/spec#-disclaimer-), as of late 2016.
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- [`acbuild`](https://github.com/containers/build#this-project-is-currently-unmaintained) is not maintained anymore.
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- `*.aci` files are not available from `v3.4` release.
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- Exit on [empty hosts in advertise URLs](https://github.com/coreos/etcd/pull/8786).
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- Address [advertise client URLs accepts empty hosts](https://github.com/coreos/etcd/issues/8379).
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- e.g. exit with error on `--advertise-client-urls=http://:2379`.
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- e.g. exit with error on `--initial-advertise-peer-urls=http://:2380`.
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- Exit on [shadowed environment variables](TODO).
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- Address [error on shadowed environment variables](https://github.com/coreos/etcd/issues/8380).
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- e.g. exit with error on `ETCD_INITIAL_CLUSTER_TOKEN=abc etcd --initial-cluster-token=def`.
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- Migrate dependency management tool from `glide` to [`golang/dep`](https://github.com/coreos/etcd/pull/9155).
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- <= 3.3 puts `vendor` directory under `cmd/vendor` directory to [prevent conflicting transitive dependencies](https://github.com/coreos/etcd/issues/4913).
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- 3.4 moves `cmd/vendor` directory to `vendor` at repository root.
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- Remove recursive symlinks in `cmd` directory.
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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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### Added(`etcd`)
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- Add [`--discovery-srv-name`](https://github.com/coreos/etcd/pull/8690) flag to support custom DNS SRV name with discovery.
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- If not given, etcd queries `_etcd-server-ssl._tcp.[YOUR_HOST]` and `_etcd-server._tcp.[YOUR_HOST]`.
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- If `--discovery-srv-name="foo"`, then query `_etcd-server-ssl-foo._tcp.[YOUR_HOST]` and `_etcd-server-foo._tcp.[YOUR_HOST]`.
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- Useful for operating multiple etcd clusters under the same domain.
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### Added(API)
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- Add [`snapshot`](https://github.com/coreos/etcd/pull/9118) package for snapshot restore/save operations.
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- Add [`watch_id` field to `etcdserverpb.WatchCreateRequest`](https://github.com/coreos/etcd/pull/9065), allow user-provided watch ID to `mvcc`.
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- Corresponding `watch_id` is returned via `etcdserverpb.WatchResponse`, if any.
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- Add [`raftAppliedIndex` field to `etcdserverpb.StatusResponse`](https://github.com/coreos/etcd/pull/9176) for current Raft applied index.
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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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### 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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- 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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- Fix [missing learner nodes on `(n *node) ApplyConfChange`](https://github.com/coreos/etcd/pull/9116).
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