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ElasticSearch備份快照到HDFS-2.6(CDH5.6.0)

repository-hdfs安裝包的下載下傳位址: https://oss.sonatype.org/content/repositories/snapshots/org/elasticsearch/elasticsearch-repository-hdfs/

背景說明

由于業務需要将ES-2.2.1版本更新到ES-2.3.2版本,需要将index遷移過去,查了很多資料,最後決定用es的快照/恢複子產品來實作索引遷移。

在這裡我采用CDH5.6.0的HDFS作為快照的存儲檔案系統,在ES中安裝repository-hdfs這個插件

hdfs的路徑為:

hdfs://192.168.10.236:8020

線上安裝踩過的坑(失敗)

  1. 按照repository-hdfs插件位址的說明,可以用

    bin/plugin install elasticsearch/elasticsearch-repository-hdfs/2.3.2

    線上安裝,然而安裝的時候一直報錯,經過檢查,是

    plugin-descriptor.properties

    裡面的版本設定問題,ES-2.3.2版本卻對應着2.3.1的安裝包,最後執行

    bin/plugin install elasticsearch/elasticsearch-repository-hdfs/2.3.1

    安裝成功
  2. 于是按照repository-hdfs插件位址的說明
repositories
  hdfs:
    uri: "hdfs://<host>:<port>/"    # optional - Hadoop file-system URI
    path: "some/path"               # required - path with the file-system where data is stored/loaded
    load_defaults: "true"           # optional - whether to load the default Hadoop configuration (default) or not
    conf_location: "extra-cfg.xml"  # optional - Hadoop configuration XML to be loaded (use commas for multi values)
    conf.<key> : "<value>"          # optional - 'inlined' key=value added to the Hadoop configuration
    concurrent_streams:            # optional - the number of concurrent streams (defaults to )
    compress: "false"               # optional - whether to compress the metadata or not (default)
    user: "foobar"                  # optional - user name for creating the file system. Typically used along-side the uri for `SIMPLE` authentication
    ## Kerberos specific settings
    user_keytab: "other/path"       # optional - user keytab
    user_principal: "buckethead"    # optional - user's Kerberos principal name
    user_principal_hostname: "gw"   # optional - hostname replacing the user's Kerberos principal $host
           

在elasticsearch.yml配置檔案後加上,

repositories.hdfs:
uri: "hdfs://192.168.10.236:8020"
path: "/es"
load_defaults: "true"
concurrent_streams: 
conf_location: "core-site.xml,hdfs-site.xml"
compress: "true"
           

把CDH5.6.0中的HDFS裡的

/etc/hadoop/conf/hdfs-site.xml

core-site.xml

複制到ES每個節點的

/elasticsearch-2.3.2/conf/

下,并重新開機ES叢集

3.建立repository,執行

```
curl -XPUT '192.168.10.225:9201/_snapshot/backup?pretty' -d '{
"type": "hdfs",
"settings": {
"uri": "hdfs://192.168.10.236:8020",
"path": "/es",
"load_defaults": "true"
}
}'
```
           

結果報了

Server IPC version 9 cannot communicate with client version 4

的錯誤,原因是線上安裝的插件裡的jar包版本太舊,線上安裝宣告失敗。

離線安裝repository-hdfs插件(成功)

1. 在repository-hdfs插件倉庫中下載下傳對應版本的插件,我這裡下載下傳

elasticsearch-repository-hdfs-2.3.2.BUILD-20160516.063716-13-hadoop2.zip

2. 将zip通過scp發送到每個es節點

3. 安裝

3. 配置

在elasticsearch.yml配置檔案後加上(必須,否則會有權限問題)

# 禁用jsm,使快照能儲存于hdfs
    security.manager.enabled: false
           

至于下面的配置,可以加上,也可以通過restful api配置

repositories.hdfs:
  uri: "hdfs://192.168.10.236:8020"
  path: "/es"
  load_defaults: "true"
  concurrent_streams: 
  conf_location: "core-site.xml,hdfs-site.xml"
  compress: "true"
           

重新開機每個節點

4. 建立repository (采用kopf插件)

ElasticSearch備份快照到HDFS-2.6(CDH5.6.0)

5. 建立快照

ElasticSearch備份快照到HDFS-2.6(CDH5.6.0)

6. 恢複快照

ElasticSearch備份快照到HDFS-2.6(CDH5.6.0)

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