mirror of
https://github.com/rancher/rancher-docs.git
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421 lines
17 KiB
JavaScript
421 lines
17 KiB
JavaScript
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/***/ 52950:
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"title": "为大型安装进行 etcd 调优",
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value: '示例：此 RKE cluster.yml 文件的代码片段将 Keyspace 的大小增加到 5GB',
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id: '示例此-rke-clusteryml-文件的代码片段将-keyspace-的大小增加到-5gb',
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level: 3
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value: '扩展 etcd 磁盘性能',
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mdxType: "MDXLayout"
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}), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", null, `当你运行具有 15 个或更多集群的大型 Rancher 安装时，我们建议你扩大 etcd 的默认 keyspace（默认为 2GB）。你最大可以将它设置为 8GB。此外，请确保主机有足够的 RAM 来保存整个数据集。如果需要增加这个值，你还需要同步增加主机的大小。如果你预计在垃圾回收间隔期间 Pod 的变化率很高，你也可以在较小的安装中调整 Keyspace 大小。`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", null, `Kubernetes 每隔五分钟会自动清理 etcd 数据集。在某些情况下（例如发生部署抖动），在垃圾回收发生并进行清理之前会有大量事件写入 etcd 并删除，从而导致 Keyspace 填满。如果你在 etcd 日志或 Kubernetes API Server 日志中看到 `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
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parentName: "p"
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}, `mvcc: database space exceeded`), ` 错误，你可以在 etcd 服务器上设置 `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("a", {
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parentName: "p",
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"href": "https://etcd.io/docs/v3.4.0/op-guide/maintenance/#space-quota"
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}, `quota-backend-bytes`), ` 来增加 Keyspace 的大小。`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("h3", {
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"id": "示例此-rke-clusteryml-文件的代码片段将-keyspace-的大小增加到-5gb"
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}, `示例：此 RKE cluster.yml 文件的代码片段将 Keyspace 的大小增加到 5GB`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("pre", null, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("code", {
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parentName: "pre",
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"className": "language-yaml"
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}, `# RKE cluster.yml
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---
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services:
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etcd:
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extra_args:
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quota-backend-bytes: 5368709120
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`)), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("h2", {
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"id": "扩展-etcd-磁盘性能"
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}, `扩展 etcd 磁盘性能`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", null, `你可以参见 `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("a", {
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"href": "https://etcd.io/docs/v3.4.0/tuning/#disk"
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}, `etcd 文档`), `中的建议，了解如何调整主机上的磁盘优先级。`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", null, `此外，为了减少 etcd 磁盘上的 IO 争用，你可以为 data 和 wal 目录使用专用设备。etcd 最佳实践不建议配置 Mirror RAID（因为 etcd 在集群中的节点之间复制数据）。你可以使用 striping RAID 配置来增加可用的 IOPS。`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("p", null, `要在 RKE 集群中实现此解决方案，你需要在底层主机上为 `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
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|
}, `extra_args`), ` 指令中必须包含 `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
|
|
parentName: "p"
|
|
}, `wal_dir`), ` 目录。如果不指定 `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
|
|
parentName: "p"
|
|
}, `wal_dir`), `，etcd 进程会尝试在权限不足的情况下操作底层的 `, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("inlineCode", {
|
|
parentName: "p"
|
|
}, `wal`), ` 挂载。`), /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("pre", null, /*#__PURE__*/ (0,_mdx_js_react__WEBPACK_IMPORTED_MODULE_1__/* .mdx */ .kt)("code", {
|
|
parentName: "pre",
|
|
"className": "language-yaml"
|
|
}, `# RKE cluster.yml
|
|
---
|
|
services:
|
|
etcd:
|
|
extra_args:
|
|
data-dir: '/var/lib/rancher/etcd/data/'
|
|
wal-dir: '/var/lib/rancher/etcd/wal/wal_dir'
|
|
extra_binds:
|
|
- '/var/lib/etcd/data:/var/lib/rancher/etcd/data'
|
|
- '/var/lib/etcd/wal:/var/lib/rancher/etcd/wal'
|
|
`)));
|
|
}
|
|
MDXContent.isMDXComponent = true;
|
|
|
|
|
|
/***/ })
|
|
|
|
}]); |