elasticsearch - 如何备份和恢复 ElasticSearch

Question

我一直在尝试使用以下方法将 ElasticSearch 集群从一台服务器备份和还原到另一台服务器，但收效甚微。到目前为止，我还没有使用过备份过程，我想将我的整个 ElasticSearch 集群从一个 2GB 的小集群移动到 15GB 的集群。我使用了以下方法。

使用 taskrabit/elasticsearch-dump - 我成功地将完整的数据库导出到 backup.json 文件，但是在恢复 backup.json 时，它给了我以下输出。在进一步研究输出后，我了解到插件的批量输入尚未完全开发。

 ./bin/elasticdump --all=true --input=/home/user/backup.json --output=http://192.168.0.213:9200/ --type=data
 Thu, 09 Feb 2017 06:43:29 GMT | starting dump
 Thu, 09 Feb 2017 06:43:29 GMT | got 61 objects from source file (offset: 0)
 Thu, 09 Feb 2017 06:43:29 GMT | sent 61 objects to destination elasticsearch, wrote 0
 Thu, 09 Feb 2017 06:43:29 GMT | got 0 objects from source file (offset: 61)
 Thu, 09 Feb 2017 06:43:29 GMT | Total Writes: 0
 Thu, 09 Feb 2017 06:43:29 GMT | dump complete

使用 elasticsearch-tools(es-export-bulk 和 es-import bulk)我再次能够成功备份 json。但是导入再次失败并出现错误:

 "statusCode":400,"response":"{"error":{ 

我使用了来自 es-bulk-export 的示例

使用 ElasticSearch 内置快照和还原。

 curl -XPUT 'http://localhost:9200/_snapshot/my_backup' -d '{
   "type": "fs",
    "settings": {"location": "/home/shawn/backup", "compress": true}
 }'

我相信我错过了一些东西，因为执行给了我以下错误。我需要创建 /_snapshot/my_backup ?如果是这样怎么办？

{"error":{"root_cause":[
  {"type":"repository_exception",
   "reason":"[my_backup] location [/home/shawn/backup] doesn't match any of the locations specified by path.repo because this setting is empty"
  }],
   "type":"repository_exception","reason":"[my_backup] failed to create repository",
   "caused_by":
       {"type":"creation_exception","reason":"Guice creation errors:\n\n1) Error injecting constructor, RepositoryException[[my_backup] location [/home/shawn/backup] doesn't match any of the locations specified by path.repo because this setting is empty]\n  at org.elasticsearch.repositories.fs.FsRepository.<init>(Unknown Source)\n  while locating org.elasticsearch.repositories.fs.FsRepository\n  while locating org.elasticsearch.repositories.Repository\n\n1 error","caused_by":{"type":"repository_exception","reason":"[my_backup] location [/home/shawn/backup] doesn't match any of the locations specified by path.repo because this setting is empty"}}},"status":500}

Answer 1

你正在创建你的 _snapshot/my_backup 就好了，你只需要添加一行到 /etc/elasticsearch/elasticsearch.yml :

path.repo: ["/home/shawn/backup"]

这是快照的实际位置。然后重启 Elasticsearch。