前言

• 业务需要将 Elasticsearch 快照到 AWS S3，再将快照拷贝到 Windows 系统，并恢复到 Elasticsearch。如下图所示：

  

• 环境

  Elasticsearch 7.10.1
  Windows Server 2019
  Ubuntu 20.04 （ES 宿主）

ES 集群1 安装 S3 插件

• 官方文档： https://www.elastic.co/guide/...
• 应在 ES 集群的所有节点上安装插件
• 下载 S3 插件和 SHA hash，并上传到 ES 服务器

• 查看并校验

  # ll -ah
  total 4.6M
  drwxr-xr-x 2 qhy qhy 4.0K Mar  9 01:55 ./
  drwxr-xr-x 7 qhy qhy 4.0K Mar  9 01:50 ../
  -rw-rw-r-- 1 qhy qhy 4.6M Mar  9 01:55 repository-s3-7.10.1.zip
  -rw-rw-r-- 1 qhy qhy  154 Mar  9 01:55 repository-s3-7.10.1.zip.sha512
  
  # shasum -a 512 -c repository-s3-7.10.1.zip.sha512 
  repository-s3-7.10.1.zip: OK

• 安装

  # /usr/share/elasticsearch/bin/elasticsearch-plugin install file:///home/qhy/es_down/repository-s3-7.10.1.zip
  -> Installing file:///home/qhy/es_down/repository-s3-7.10.1.zip
  -> Downloading file:///home/qhy/es_down/repository-s3-7.10.1.zip
  [=================================================] 100%   
  @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
  @     WARNING: plugin requires additional permissions     @
  @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
  java.lang.RuntimePermission accessDeclaredMembers
  java.lang.RuntimePermission getClassLoader
  java.lang.reflect.ReflectPermission suppressAccessChecks
  java.net.SocketPermission * connect,resolve
  java.util.PropertyPermission es.allow_insecure_settings read,write
  See http://docs.oracle.com/javase/8/docs/technotes/guides/security/permissions.html
  for descriptions of what these permissions allow and the associated risks.
  
  Continue with installation? [y/N]y
  -> Installed repository-s3

• 重启 ES 服务

ES 集群1 添加 KEY

• 官方文档： https://www.elastic.co/guide/...
• 应在 ES 集群的所有节点上添加 key

• 查看有哪些 key

  /usr/share/elasticsearch/bin/elasticsearch-keystore list
  

• 添加 access_key

  /usr/share/elasticsearch/bin/elasticsearch-keystore add s3.client.default.access_key

• 添加 secret_key

  /usr/share/elasticsearch/bin/elasticsearch-keystore add s3.client.default.secret_key

• 重载配置

  POST _nodes/reload_secure_settings

创建 S3 快照仓库

• 官方文档： https://www.elastic.co/guide/...
• 注意中国区不支持 region，用 endpoint 替代

PUT _snapshot/my_s3_repository
{
  "type": "s3",
  "settings": {
    "endpoint": "s3.cn-northwest-1.amazonaws.com.cn",
    "bucket": "zt-hadoop-cn-northwest-1",
    "base_path": "es_snapshot", 
    "max_snapshot_bytes_per_sec": "200mb",  # 调整快照创建的速度，默认 40mb
    "max_restore_bytes_per_sec": "200mb"    # 调整快照恢复的速度，默认无限制
  }
}

• 查看所有注册的快照仓库

GET _snapshot/_all

• 删除快照仓库

DELETE _snapshot/my_s3_repository

• 调整集群恢复分片速度和并发数

PUT _cluster/settings 
{
  "transient": {
    "indices.recovery.max_bytes_per_sec": "200mb",  # 默认 40mb
    "cluster.routing.allocation.node_concurrent_recoveries": "5"    # 默认 2
  }
}

• 查看集群配置（包括默认配置）

GET _cluster/settings?flat_settings&include_defaults

创建快照

• 官方文档： https://www.elastic.co/guide/...

PUT /_snapshot/my_s3_repository/snapshot_zt
{
  "indices": "zt_product_doc_index_20210223_3",
  "ignore_unavailable": true,
  "include_global_state": false
}

• 查看一个my_s3_repository仓库下的所有快照

GET _snapshot/my_s3_repository/_all

• 查看 snapshot_zt 快照的概要状态

GET _snapshot/my_s3_repository/snapshot_zt

• 查看 snapshot_zt 快照的详细状态

GET _snapshot/my_s3_repository/snapshot_zt/_status

• 删除快照

DELETE _snapshot/my_s3_repository/snapshot_zt

从 S3 恢复快照

• 官方文档： https://www.elastic.co/guide/...

  POST /_snapshot/my_s3_repository/snapshot_zt/_restore
  {
    "indices": "zt_product_doc_index_20210223_3",
    "index_settings": {
  "index.number_of_replicas": 0
    },
    "rename_pattern": "zt_product_doc_index_20210223_3",
    "rename_replacement": "zt_product_doc_index_20210223_3_restore"
  }

• 增加副本

  PUT zt_product_doc_index_20210223_3_restore/_settings
  {
    "index.number_of_replicas" : "1"
  }

从 Windows 共享目录恢复快照

• 已将 S3 上的文件拷贝到 Windows 的共享目录，并挂载到 ES 集群2 服务器的 /mnt/winshare 目录

  # tree -d /mnt/winshare/
  /mnt/winshare/
  └── es_snapshot
    └── indices
        └── kM6SVcCrTUGjP-634aDUYg
            ├── 0
            ├── 1
            └── 2

• Linux 挂载 Windows 共享目录参见： Ubuntu 20.04 读写 Windows 10 共享目录

• 在 elasticsearch.yml 文件中添加如下配置，并重启 ES 服务

  path.repo:
  - /mnt/winshare

• 创建 Windows 系统的快照仓库

  PUT /_snapshot/my_backup
  {
  "type": "fs",
  "settings": {
    "location": "/mnt/winshare/es_snapshot"
  }
  }

• 官方文档

  POST /_snapshot/my_backup/snapshot_zt/_restore
  {
  "indices": "zt_product_doc_index_20210223_3",
  "index_settings": {
    "index.number_of_replicas": 0
  },
  "rename_pattern": "zt_product_doc_index_20210223_3",
  "rename_replacement": "zt_product_doc_index_20210223_3_smb"
  }

• 增加副本

  PUT zt_product_doc_index_20210223_3_smb/_settings
  {
  "index.number_of_replicas" : "1"
  }

本文出自  qbit snap