CHANGELOG: track clientv3 fix, etcd_server_go_version

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

CHANGELOG-3.1.md

@@ -15,6 +15,7 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.1.18...v3.1.19) and
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
+- Add [`etcd_server_go_version`](https://github.com/coreos/etcd/pull/9957) Prometheus metric.
 - Add [`etcd_server_slow_read_indexes_total`](https://github.com/coreos/etcd/pull/9897) Prometheus metric.
 - Add [`etcd_server_quota_backend_bytes`](https://github.com/coreos/etcd/pull/9820) Prometheus metric.
   - Use it with `etcd_mvcc_db_total_size_in_bytes` and `etcd_mvcc_db_total_size_in_use_in_bytes`.
@@ -31,6 +32,11 @@ Note that any `etcd_debugging_*` metrics are experimental and subject to change.
   - `etcd_mvcc_db_total_size_in_use_in_bytes 16384` means future DB size if defragment operation is complete.
   - `etcd_mvcc_db_total_size_in_bytes - etcd_mvcc_db_total_size_in_use_in_bytes` is the number of bytes that can be saved on disk with defragment operation.
 
+### client v3
+
+- Fix [lease keepalive interval updates when response queue is full](https://github.com/coreos/etcd/pull/9952).
+  - If `<-chan *clientv3LeaseKeepAliveResponse` from `clientv3.Lease.KeepAlive` was never consumed or channel is full, client was [sending keepalive request every 500ms](https://github.com/coreos/etcd/issues/9911) instead of expected rate of every "TTL / 3" duration.
+
 ### Go
 
 - Compile with [*Go 1.8.7*](https://golang.org/doc/devel/release.html#go1.8).

CHANGELOG-3.2.md

@@ -14,6 +14,7 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.2.23...v3.2.24) and
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
+- Add [`etcd_server_go_version`](https://github.com/coreos/etcd/pull/9957) Prometheus metric.
 - Add [`etcd_server_heartbeat_send_failures_total`](https://github.com/coreos/etcd/pull/9942) Prometheus metric.
 - Add [`etcd_server_slow_apply_total`](https://github.com/coreos/etcd/pull/9942) Prometheus metric.
 - Add [`etcd_disk_backend_defrag_duration_seconds`](https://github.com/coreos/etcd/pull/9942) Prometheus metric.
@@ -40,6 +41,11 @@ Note that any `etcd_debugging_*` metrics are experimental and subject to change.
   - Add `grpc-proxy start --cert-file`, `grpc-proxy start --key-file` and `grpc-proxy start --trusted-ca-file` flags.
 - Add [`grpc-proxy start --metrics-addr` flag for specifying a separate metrics listen address](https://github.com/coreos/etcd/pull/9894).
 
+### client v3
+
+- Fix [lease keepalive interval updates when response queue is full](https://github.com/coreos/etcd/pull/9952).
+  - If `<-chan *clientv3LeaseKeepAliveResponse` from `clientv3.Lease.KeepAlive` was never consumed or channel is full, client was [sending keepalive request every 500ms](https://github.com/coreos/etcd/issues/9911) instead of expected rate of every "TTL / 3" duration.
+
 ### Go
 
 - Compile with [*Go 1.8.7*](https://golang.org/doc/devel/release.html#go1.8).

CHANGELOG-3.3.md

@@ -19,6 +19,7 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.3.8...v3.3.9) and [
 
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
+- Add [`etcd_server_go_version`](https://github.com/coreos/etcd/pull/9957) Prometheus metric.
 - Add [`etcd_server_heartbeat_send_failures_total`](https://github.com/coreos/etcd/pull/9940) Prometheus metric.
 - Add [`etcd_server_slow_apply_total`](https://github.com/coreos/etcd/pull/9940) Prometheus metric.
 - Add [`etcd_disk_backend_defrag_duration_seconds`](https://github.com/coreos/etcd/pull/9940) Prometheus metric.
@@ -40,6 +41,11 @@ Note that any `etcd_debugging_*` metrics are experimental and subject to change.
   - `etcd_mvcc_db_total_size_in_use_in_bytes 16384` means future DB size if defragment operation is complete.
   - `etcd_mvcc_db_total_size_in_bytes - etcd_mvcc_db_total_size_in_use_in_bytes` is the number of bytes that can be saved on disk with defragment operation.
 
+### client v3
+
+- Fix [lease keepalive interval updates when response queue is full](https://github.com/coreos/etcd/pull/9952).
+  - If `<-chan *clientv3LeaseKeepAliveResponse` from `clientv3.Lease.KeepAlive` was never consumed or channel is full, client was [sending keepalive request every 500ms](https://github.com/coreos/etcd/issues/9911) instead of expected rate of every "TTL / 3" duration.
+
 ### Go
 
 - Compile with [*Go 1.10.3*](https://golang.org/doc/devel/release.html#go1.10).

CHANGELOG-3.4.md

@@ -151,6 +151,9 @@ Note that any `etcd_debugging_*` metrics are experimental and subject to change.
   - Previously, highest bucket only collects requests taking 0.8192 seconds or more.
   - Now, highest buckets collect 0.8192 seconds, 1.6384 seconds, and 3.2768 seconds or more.
 - Add [`etcd_server_is_leader`](https://github.com/coreos/etcd/pull/9587) Prometheus metric.
+- 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_server_go_version`](https://github.com/coreos/etcd/pull/9957) Prometheus metric.
 - Add [`etcd_server_heartbeat_send_failures_total`](https://github.com/coreos/etcd/pull/9761) Prometheus metric.
 - Add [`etcd_server_slow_apply_total`](https://github.com/coreos/etcd/pull/9761) Prometheus metric.
 - Add [`etcd_server_slow_read_indexes_total`](https://github.com/coreos/etcd/pull/9897) Prometheus metric.
@@ -350,6 +353,8 @@ Note: **v3.5 will deprecate `etcd --log-package-levels` flag for `capnslog`**; `
 - Add [`Watcher.RequestProgress` method](https://github.com/coreos/etcd/pull/9869).
   - To manually trigger broadcasting watch progress event (empty watch response with latest header) to all associated watch streams.
   - Think of it as `WithProgressNotify` that can be triggered manually.
+- Fix [lease keepalive interval updates when response queue is full](https://github.com/coreos/etcd/pull/9952).
+  - If `<-chan *clientv3LeaseKeepAliveResponse` from `clientv3.Lease.KeepAlive` was never consumed or channel is full, client was [sending keepalive request every 500ms](https://github.com/coreos/etcd/issues/9911) instead of expected rate of every "TTL / 3" duration.
 
 ### etcdctl v3