CENTOS安裝ElasticSearch
CENTOS安裝ElasticSearch
</div>ElasticSearch 概述
- ElasticSearch是一個高可擴展的開源的全文搜索分析引擎。
它允許你快速的存儲、搜索和分析大量數據。ElasticSearch通常作為后端程序，為需要復雜查詢的應用提供服務。- Elasticsearch是一個基于Lucene的開源分布式搜索引擎，具有分布式多用戶能力。Elasticsearch是用java開發，提供Restful接口，能夠達到實時搜索、高性能計算；同時Elasticsearch的橫向擴展能力非常強，不需要重啟服務，基本上達到了零配置。
</ul> </blockquote> </div>
</div>ElasticSearch 安裝
</div>安裝前準備
- 安裝JDK7及以上版本(這里不再講述JDK安裝步驟)
- 下載ElasticSearch安裝包，點擊 獲取elasticsearch-2.1.1.tar.gz安裝包
</ul> </blockquote> </div>安裝ElasticSearch
運行下面命令將安裝包移動到 /opt 目錄，然后轉到 opt 目錄
mv elasticsearch-2.1.1.tar.gz /opt cd /opt解壓安裝包,然后重命名為 elasticsearch
tar zxvf elasticsearch-2.1.1.tar.gz mv elasticsearch-2.1.1 elasticsearch進入elasticsearch/bin下運行elasticsearch腳本啟動
cd elasticsearch/bin ./elasticsearch如果是用root啟動，需要繼續下面步驟
如果是用root賬號啟動，會報以下錯誤
Exception in thread "main" java.lang.RuntimeException: don't run elasticsearch as root. at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:93) at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:144) at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:285) at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:35) Refer to the log for complete error details.這是出于系統安全考慮設置的條件。由于ElasticSearch可以接收用戶輸入的腳本并且執行，為了系統安全考慮，
建議創建一個單獨的用戶用來運行ElasticSearch創建elsearch用戶組及elsearch用戶
groupadd elsearch useradd elsearch -g elsearch -p elasticsearch更改elasticsearch文件夾及內部文件的所屬用戶及組為elsearch:elsearch
cd /opt chown -R elsearch:elsearch elasticsearch切換到elsearch用戶再啟動
su elsearch cd elasticsearch/bin ./elasticsearch啟動后打印信息如下
[2015-12-30 10:15:44,876][WARN ][bootstrap ] unable to install syscall filter: prctl(PR_GET_NO_NEW_PRIVS): Invalid argument [2015-12-30 10:15:45,175][INFO ][node ] [Grim Hunter] version[2.1.1], pid[26383], build[40e2c53/2015-12-15T13:05:55Z] [2015-12-30 10:15:45,176][INFO ][node ] [Grim Hunter] initializing ... [2015-12-30 10:15:45,243][INFO ][plugins ] [Grim Hunter] loaded [], sites [] [2015-12-30 10:15:45,272][INFO ][env ] [Grim Hunter] using [1] data paths, mounts [[/ (/dev/mapper/vg_yong-lv_root)]], net usable_space [33.3gb], net total_space [49gb], spins? [no], types [ext4] [2015-12-30 10:15:47,318][INFO ][node ] [Grim Hunter] initialized [2015-12-30 10:15:47,318][INFO ][node ] [Grim Hunter] starting ... [2015-12-30 10:15:47,388][INFO ][discovery ] [Grim Hunter] elasticsearch/fnXUCLOQQBiC1aR7hhB82Q [2015-12-30 10:15:50,442][INFO ][cluster.service ] [Grim Hunter] new_master {Grim Hunter}{fnXUCLOQQBiC1aR7hhB82Q}{127.0.0.1}{127.0.0.1:9300}, reason: zen-disco-join(elected_as_master, [0] joins received) [2015-12-30 10:15:50,491][INFO ][node ] [Grim Hunter] started [2015-12-30 10:15:50,526][INFO ][gateway ] [Grim Hunter] recovered [0] indices into cluster_stateElasticSearch后端啟動命令
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