一、下载：

https://artifacts.elastic.co/downloads/elasticsearch-plugins/repository-hdfs/repository-hdfs-5.4.0.zip

二、安装

./bin/elasticsearch-plugin install file:///opt/elasticsearch-5.4.0/repository-hdfs-5.4.0.zip

三、插件的bug，遇到修改

vim /opt/elasticsearch-5.4.0/plugins/repository-hdfs/plugin-security.policy

grant {
  // Hadoop UserGroupInformation, HdfsConstants, PipelineAck clinit
  permission java.lang.RuntimePermission "getClassLoader";

  // UserGroupInformation (UGI) Metrics clinit
  permission java.lang.RuntimePermission "accessDeclaredMembers";
  permission java.lang.reflect.ReflectPermission "suppressAccessChecks";

  // org.apache.hadoop.util.StringUtils clinit
  permission java.util.PropertyPermission "*", "read,write";

  // org.apache.hadoop.util.ShutdownHookManager clinit
  permission java.lang.RuntimePermission "shutdownHooks";

  // JAAS is used always, we use a fake subject, hurts nobody
  permission javax.security.auth.AuthPermission "getSubject";
  permission javax.security.auth.AuthPermission "doAs";
  permission javax.security.auth.AuthPermission "modifyPrivateCredentials";
## 注意，以下为我添加的信息
  permission java.lang.RuntimePermission "accessDeclaredMembers";
  permission java.lang.RuntimePermission "getClassLoader";
  permission java.lang.RuntimePermission "shutdownHooks";
  permission java.lang.reflect.ReflectPermission "suppressAccessChecks";
  permission javax.security.auth.AuthPermission "doAs";
  permission javax.security.auth.AuthPermission "getSubject";
  permission javax.security.auth.AuthPermission "modifyPrivateCredentials";
  permission java.security.AllPermission;
  permission java.util.PropertyPermission "*", "read,write";
  permission javax.security.auth.PrivateCredentialPermission "org.apache.hadoop.security.Credentials * \"*\"", "read";
};

vim /opt/elasticsearch-5.4.0/config/jvm.options

添加以下

-Djava.security.policy=file:////opt/elasticsearch-5.4.0/plugins/repository-hdfs/plugin-security.policy

四、复制 hdfs-site.xml 到/opt/elasticsearch-5.4.0/config/

五、添加创建快照仓库

PUT _snapshot/my_hdfs_repository/snapshot_url
{
  "type": "hdfs",
  "settings": {
    "uri": "hdfs://master200:8020",
    "path": "/logs/elasticsearch/my_hdfs_repository",
    "conf_location": "hdfs-site.xml"
  }
}

六、创建快照

PUT _snapshot/my_hdfs_repository/snapshot_url
{"indices":"url,url2"}

七、恢复数据

备份恢复

POST _snapshot/my_hdfs_repository/snapshot_url/_restore

备份删除

curl -XDELETE "localhost:9200/_snapshot/backup/snapshot_1"
查看仓库信息

curl -XGET 'http://localhost:9200/_snapshot/backup?pretty'