CHANGELOG: add links to "List of metrics"

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

CHANGELOG-3.1.md

@@ -13,6 +13,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.1.18...v3.1.19) and
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-1) for all metrics per release.
+
 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.
@@ -48,6 +50,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.1.17...v3.1.18) and
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-1) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Add [`etcd_server_version`](https://github.com/coreos/etcd/pull/8960) Prometheus metric.
@@ -110,6 +114,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.1.13...v3.1.14) and
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-1) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Add [`etcd_server_is_leader`](https://github.com/coreos/etcd/pull/9587) Prometheus metric.
@@ -143,6 +149,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.1.12...v3.1.13) and
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-1) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Add missing [`etcd_network_peer_sent_failures_total` count](https://github.com/coreos/etcd/pull/9437).

CHANGELOG-3.2.md

@@ -12,6 +12,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.2.23...v3.2.24) and
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-2) for all metrics per release.
+
 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.
@@ -65,6 +67,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.2.22...v3.2.23) and
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-2) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Add [`etcd_server_version`](https://github.com/coreos/etcd/pull/8960) Prometheus metric.
@@ -129,6 +133,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.2.18...v3.2.19) and
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-2) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Fix [`etcd_debugging_server_lease_expired_total`](https://github.com/coreos/etcd/pull/9557) Prometheus metric.
@@ -171,6 +177,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.2.17...v3.2.18) and
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-2) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Add missing [`etcd_network_peer_sent_failures_total` count](https://github.com/coreos/etcd/pull/9437).
@@ -416,6 +424,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.2.5...v3.2.6) and [
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-2) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Fix `etcd_debugging_mvcc_keys_total` inconsistency.
@@ -441,6 +451,8 @@ See [security doc](https://github.com/coreos/etcd/blob/master/Documentation/op-g
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-2) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Fix unreachable `/metrics` endpoint when `--enable-v2=false`.
@@ -538,6 +550,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.2.0...v3.2.1) and [
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-2) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Fix backend database size debugging metrics.
@@ -574,6 +588,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.1.0...v3.2.0) and [
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-2) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Add [`etcd_disk_backend_snapshot_duration_seconds`](https://github.com/coreos/etcd/pull/7892)

CHANGELOG-3.3.md

@@ -17,6 +17,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.3.8...v3.3.9) and [
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-3) for all metrics per release.
+
 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.
@@ -127,6 +129,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.3.3...v3.3.4) and [
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-3) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Add [`etcd_server_is_leader`](https://github.com/coreos/etcd/pull/9587) Prometheus metric.
@@ -183,6 +187,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.3.2...v3.3.3) and [
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-3) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Add missing [`etcd_network_peer_sent_failures_total` count](https://github.com/coreos/etcd/pull/9437).
@@ -297,6 +303,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.2.0...v3.3.0) and [
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#v3-3) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Add [`etcd --listen-metrics-urls`](https://github.com/coreos/etcd/pull/8242) flag for additional `/metrics` and `/health` endpoints.

CHANGELOG-3.4.md

@@ -139,6 +139,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.3.0...v3.4.0) and [
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#latest) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Add [`etcd_network_active_peers`](https://github.com/coreos/etcd/pull/9762) Prometheus metric.

CHANGELOG-3.5.md

@@ -30,6 +30,8 @@ See [code changes](https://github.com/coreos/etcd/compare/v3.4.0...v3.5.0) and [
 
 ### Metrics, Monitoring
 
+See [List of metrics](https://etcd.readthedocs.io/en/latest/operate.html#latest) for all metrics per release.
+
 Note that any `etcd_debugging_*` metrics are experimental and subject to change.
 
 - Deprecated `etcd_debugging_mvcc_db_total_size_in_bytes` Prometheus metric. Instead, use `etcd_mvcc_db_total_size_in_bytes`.