v1.0.4 release

Signed-off-by: Aylei <rayingecho@gmail.com>

CHANGELOG.md

@@ -1,3 +1,66 @@
+# TiDB Operator v1.0.4 Release Notes
+
+## v1.0.4 What's New
+
+### Action Required
+
+There is no action required if you are upgrading from [v1.0.3](#tidb-operator-v103-release-notes).
+
+### Highlights
+
+[#1202](https://github.com/pingcap/tidb-operator/pull/1202) introduced `HostNetwork` support, which offers better performance comparing to the Pod network. Check out our [benchmark report](https://pingcap.com/docs/dev/benchmark/sysbench-in-k8s/#pod-network-vs-host-network) for details.
+
+> **Note:**
+>
+> Due to [this issue of Kubernetes](https://github.com/kubernetes/kubernetes/issues/78420), the Kubernetes cluster must meet one of the following versions to enable `HostNetwork` of TiDB cluster:
+>  - `v1.13.11` or later
+>  - `v1.14.7` or later
+>  - `v1.15.4` or later
+>  - any version since `v1.16.0`
+
+[#1175](https://github.com/pingcap/tidb-operator/pull/1175) add `podSecurityContext` support for TiDB cluster Pods, we recommend setting the namespaced kernel parameters for TiDB cluster Pods according to our [Environment Recommendation](https://pingcap.com/docs/dev/tidb-in-kubernetes/deploy/prerequisites/#the-configuration-of-kernel-parameters).
+
+New Helm chart `tidb-lightning` brings [TiDB Lightning](https://pingcap.com/docs/stable/reference/tools/tidb-lightning/overview/) support for TiDB in Kubernetes. Check out the [document](https://pingcap.com/docs/dev/tidb-in-kubernetes/maintain/lightning/) for detailed user guide.
+
+Another new Helm chart `tidb-drainer` brings multiple drainers support for TiDB Binlog in Kubernetes. Check out the [document](https://pingcap.com/docs/dev/tidb-in-kubernetes/maintain/tidb-binlog/#deploy-multiple-drainers) for detailed user guide.
+
+### Improvements
+
+- HostNetwork support ([#1202](https://github.com/pingcap/tidb-operator/pull/1202))
+- Support configuring sysctls for Pods and enable net.* ([#1175](https://github.com/pingcap/tidb-operator/pull/1175))
+- Add tidb-lightning support ([#1161](https://github.com/pingcap/tidb-operator/pull/1161))
+- Add new helm chart tidb-drainer to support multiple drainers ([#1160](https://github.com/pingcap/tidb-operator/pull/1160))
+
+## Detailed Bug Fixes and Changes
+
+- Add e2e scripts and simplify e2e jenkins file ([#1174](https://github.com/pingcap/tidb-operator/pull/1174))
+- Fix the pump/drainer data dir to avoid data loss caused by bad configuration([#1183](https://github.com/pingcap/tidb-operator/pull/1183))
+- Add e2e to init sql ([#1199](https://github.com/pingcap/tidb-operator/pull/1199))
+- Keep the instance label of drainer same with the TiDB cluster in favor of monitoring ([#1170](https://github.com/pingcap/tidb-operator/pull/1170))
+- Set podSecuriyContext to nil by default in favor of backward compatiability ([#1184](https://github.com/pingcap/tidb-operator/pull/1184))
+
+## Additional Notes for Users of v1.1.0.alpha branch
+
+For historical reason, `v1.1.0.alpha` is an hot-fix branch and got this name by mistake. All fixes in that branch are cherry-picked to `v1.0.4` and
+the `v1.1.0.alpha` branch will be discarded to keep things clear.
+
+We strongly recommend you to upgrade to `v1.0.4` if you are using any version under `v1.1.0.alpha`.
+
+`v1.0.4` introduces the following fixes comparing to `v1.1.0.alpha.3`:
+
+- HostNetwork support ([#1202](https://github.com/pingcap/tidb-operator/pull/1202))
+- Add permit host option for tidb-initializer job ([#779](https://github.com/pingcap/tidb-operator/pull/779))
+- Fix drainer misconfiguration in tidb-cluster chart ([#945](https://github.com/pingcap/tidb-operator/pull/945))
+- Set the default externalTrafficPolicy to be Local for TiDB service ([#960](https://github.com/pingcap/tidb-operator/pull/960))
+- Fix tidb-operator crash when user modify sts upgrade strategy improperly ([#969](https://github.com/pingcap/tidb-operator/pull/969))
+- Add maxFailoverCount limit to TiKV ([#976](https://github.com/pingcap/tidb-operator/pull/976))
+- Fix values file customization for tidb-operator on aliyun ([#983](https://github.com/pingcap/tidb-operator/pull/983))
+- Do not limit failover count when maxFailoverCount = 0 ([#978](https://github.com/pingcap/tidb-operator/pull/978))
+- Suspend ReplaceUnhealthy process for AWS tikv auto-scaling-group ([#1027](https://github.com/pingcap/tidb-operator/pull/1027))
+- Fix create_tidb_cluster_release variable does not work ([#1066](https://github.com/pingcap/tidb-operator/pull/1066)))
+- Add `v1` to statefulset apiVersions ([#1056](https://github.com/pingcap/tidb-operator/pull/1056))
+- Add timezone support ([#1126](https://github.com/pingcap/tidb-operator/pull/1027))
+
 # TiDB Operator v1.0.3 Release Notes
 
 ## v1.0.3 What's New