ES集群迁移

elasticsearch

1.修改ES配置文件 增加仓库配置目录配置 并给ES写入的权限

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path.repo: ["/usr/share/elasticsearch/backup"]  #目录必须是ES可以访问的目录 如果是集群 需要全部数据节点配置上

2.创建仓库

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PUT /_snapshot/backup -H 'Content-Type: application/json' -d '
{
   "indices":"source_index",
   "type": "fs",
   "settings": {
        "location": "/usr/share/elasticsearch/backup",
        "compress": true
   }
}'

3.创建快照

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PUT /_snapshot/backup/your_snapshot_name -H 'Content-Type: application/json' -d '
{
  "indices": "source_index",
  "ignore_unavailable": true,
  "include_global_state": false
}'

可以通过/_snapshot/_status查看进度

4.在目标集群按照步骤1、2 创建仓库，然后将快照文件拷贝到仓库目录下
5.在目标集群上将快照还原

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POST /_snapshot/backup/your_snapshot_name/_restore
{
  "indices": "dest_index_name",
  "ignore_unavailable": true,
  "include_global_state": false
}

可能的异常：

1.path.repo配置没有部署到所有节点

[backup] location [/usr/share/elasticsearch/backup] doesn't match any of the locations specified by path.repo because this setting is empty

2.报错failed to create blob container是目录权限问题