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op-guide: use scheduler remove command instead of curl command #799

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Jul 9, 2018
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op-guide: use scheduler remove command instead of curl command #799

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op-guide: use scheduler remove command instead of curl
LinuxGit Jul 7, 2018
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op-guide: fix format
LinuxGit Jul 7, 2018
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17 changes: 13 additions & 4 deletions op-guide/ansible-deployment-rolling-update.md
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Expand Up @@ -13,7 +13,8 @@ category: deployment
## 升级组件版本

> **注**：
> 跨大版本升级，需要更新 `tidb-ansible`，从 TiDB 1.0 升级到 TiDB 2.0，请参考 [TiDB 2.0 升级操作指南](tidb-v2-upgrade-guide.md)。
> 跨大版本升级，必须更新 `tidb-ansible`，从 TiDB 1.0 升级到 TiDB 2.0，请参考 [TiDB 2.0 升级操作指南](tidb-v2-upgrade-guide.md)。
> 小版本升级，也建议更新 `tidb-ansible`，以获取最新的配置文件模板、特性及 bug 修复。

### 自动下载 binary

Expand Down Expand Up @@ -62,11 +63,19 @@ wget http://download.pingcap.org/tidb-v2.0.3-linux-amd64-unportable.tar.gz

滚动升级 TiKV 实例时，Ansible 会迁移 region leader 到其他节点。具体逻辑为：调用 PD API 添加 evict leader scheduler，每 10 秒探测一次该 TiKV 实例 leader_count， 等待 leader_count 降到 10 以下（或 为空）或探测超 12 次后，即两分钟超时后，开始关闭 TiKV 升级，启动成功后再去除 evict leader scheduler，串行操作。

如中途升级失败，请登录 pd-ctl 执行 scheduler show，查看是否有 evict-leader-scheduler, 如有需手工清除。`{PD_IP}` 和 `{STORE_ID}` 请替换为你的 PD IP 及 TiKV 实例的 store_id 。
如中途升级失败，请登录 pd-ctl 执行 `scheduler show`，查看是否有 evict-leader-scheduler, 如有需手工清除。`{PD_IP}` 和 `{STORE_ID}` 请替换为你的 PD IP 及 TiKV 实例的 store_id。

```
$ /home/tidb/tidb-ansible/resources/bin/pd-ctl -u "http://{PD_IP}:2379" -d scheduler show
$ curl -X DELETE "http://{PD_IP}:2379/pd/api/v1/schedulers/evict-leader-scheduler-{STORE_ID}"
$ /home/tidb/tidb-ansible/resources/bin/pd-ctl -u "http://{PD_IP}:2379"
» scheduler show
[
"label-scheduler",
"evict-leader-scheduler-{STORE_ID}",
"balance-region-scheduler",
"balance-leader-scheduler",
"balance-hot-region-scheduler"
]
» scheduler remove evict-leader-scheduler-{STORE_ID}
```

- 滚动升级 TiDB 节点（只升级单独 TiDB 服务，如果 TiDB 集群开启了 binlog，升级 TiDB 服务时会升级 pump）
Expand Down