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HDDS-12030. Update SCM-HA.zh.md #7669

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HDDS-12030. Update SCM-HA.zh.md
jojochuang Jan 9, 2025
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Update hadoop-hdds/docs/content/feature/SCM-HA.md
jojochuang Jan 9, 2025
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Update hadoop-hdds/docs/content/feature/SCM-HA.md
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jojochuang Jan 9, 2025
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18 changes: 4 additions & 14 deletions hadoop-hdds/docs/content/feature/SCM-HA.md
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Expand Up @@ -33,14 +33,6 @@ This document explains the HA setup of Storage Container Manager (SCM), please c

## Configuration

HA mode of Storage Container Manager can be enabled with the following settings in `ozone-site.xml`:

```XML
<property>
<name>ozone.scm.ratis.enable</name>
<value>true</value>
</property>
```
One Ozone configuration (`ozone-site.xml`) can support multiple SCM HA node set, multiple Ozone clusters. To select between the available SCM nodes a logical name is required for each of the clusters which can be resolved to the IP addresses (and domain names) of the Storage Container Managers.

This logical name is called `serviceId` and can be configured in the `ozone-site.xml`
Expand Down Expand Up @@ -232,10 +224,8 @@ bin/ozone debug ldb --db=/tmp/metadata/scm.db ls
bin/ozone debug ldb --db=/tmp/metadata/scm.db scan --column-family=containers
```

## Migrating from existing SCM

SCM HA can be turned on on any Ozone cluster. First enable Ratis (`ozone.scm.ratis.enable`) and configure only one node for the Ratis ring (`ozone.scm.nodes.serviceId` should have one element).

Start the cluster and test if it works well.
## Migrating from Non-HA to HA SCM

If everything is fine, you can extend the cluster configuration with multiple nodes, restart SCM node, and initialize the additional nodes with `scm --bootstrap` command.
Add additional SCM nodes and extend the cluster configuration to reflect the newly added nodes.
Bootstrap the newly added SCM nodes with `scm --bootstrap` command and start the SCM service.
Note: Make sure that the `ozone.scm.primordial.node.id` property is pointed to the existing SCM before you run the `bootstrap` command on the newly added SCM nodes.
24 changes: 4 additions & 20 deletions hadoop-hdds/docs/content/feature/SCM-HA.zh.md
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Expand Up @@ -33,20 +33,6 @@ Ozone Manager 和 Storage Container Manager 都支持 HA。在这种模式下，

## 配置

> &#x26a0;&#xfe0f; **注意** &#x26a0;&#xfe0f;
>
> SCM HA 目前仅支持新初始化的集群。
> SCM HA 必须在 Ozone 服务首次启动前开启。
> 当某个 SCM 以非 HA 的模式启动后，不支持将其改为 HA 模式。
Storage Container Manager 的 HA 模式可以在 `ozone-site.xml` 中进行以下设置：

```XML
<property>
<name>ozone.scm.ratis.enable</name>
<value>true</value>
</property>
```
一个 Ozone 配置(`ozone-site.xml`)可以支持多个SCM HA节点集，多个 Ozone 集群。要在可用的 SCM 节点之间进行选择，每个集群都需要一个逻辑名称，可以将其解析为 Storage Container Manage 的 IP 地址(和域名)。

这个逻辑名称称为 `serviceId`，可以在 `ozone-site.xml` 中配置。
Expand Down Expand Up @@ -216,10 +202,8 @@ bin/ozone debug ldb --db=/tmp/metadata/scm.db ls
bin/ozone debug ldb --db=/tmp/metadata/scm.db scan --column-family=containers
```

## 从现有的SCM迁移

可以在任何 Ozone 集群上打开 SCM HA。 首先启用 Ratis（`ozone.scm.ratis.enable`）并为 Ratis ring 配置一个节点（`ozone.scm.nodes.serviceId` 应该有一个元素）。

启动集群并测试它是否正常工作。
## 从非HA SCM迁移到SCM HA

如果一切正常，您可以用多个节点扩展集群配置，重新启动 SCM 节点，并使用 `scm --bootstrap` 命令初始化其他节点。
添加额外的 SCM 节点，并扩展集群配置以包含新添加的节点。
使用 `scm --bootstrap` 命令为新添加的 SCM 节点引导启动，然后启动 SCM 服务。
注意：在新添加的 SCM 节点上运行 bootstrap 命令之前，请确保 `ozone.scm.primordial.node.id` 属性指向现有的 SCM。
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