elasticsearch5.2安裝

一、下載elasticsearch-5.2.0.rpm

rpm -i  安裝

安裝後各個目錄說明

#/usr/share/elasticsearch/               主目錄
#/var/log/elasticsearch                   log日誌

#/etc/sysconfig/elasticsearch          配置elasticsearch環境變量 
#/etc/elasticsearch/elasticsearch.yml  配置elasticsearch集羣
#/etc/elasticsearch/jvm.options        配置elasticsearch的jvm參數
#/etc/elasticsearch/log4j2.properties  配置elasticsearch日誌參數

elasticsearch啓動命令
sudo -i service elasticsearch start
sudo -i service elasticsearch stop

啓動報錯1

es5.2沒法啓動bug
報錯：
ERROR: bootstrap checks failed
system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk

緣由：
這是在由於Centos6不支持SecComp，而ES5.2.0默認bootstrap.system_call_filter爲true進行檢測，因此致使檢測失敗，失敗後直接致使ES不能啓動。

解決：
在elasticsearch.yml中配置bootstrap.system_call_filter爲false，注意要在Memory下面:
bootstrap.memory_lock: false
bootstrap.system_call_filter: false

能夠查看issues
https://github.com/elastic/elasticsearch/issues/22899

啓動報錯2

max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
max number of threads [1024] for user [Hadoop] is too low, increase to at least [2048]
max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

編輯limits.conf 文件

vim /etc/security/limits.conf 

* soft nofile 65536
* hard nofile 65536

vim /etc/security/limits.d/90-nproc.conf 

找到以下內容：

soft nproc 1024

修改成

soft nproc 2048

vi /etc/sysctl.conf

添加下面配置：vm.max_map_count=655360

並執行命令：sysctl -p

啓動報錯3

報找不到JAVA_HOME

找到#/etc/sysconfig/elasticsearch文件   配置elasticsearch環境變量 ，增長# Elasticsearch Java path
JAVA_HOME

# Elasticsearch Java path
JAVA_HOME=/usr/local/java/

二、安裝ik

Git網址

https://github.com/medcl/elasticsearch-analysis-ik

1）下載

checkout ik version respective to your elasticsearch version

git checkout tags/{version}

2）編譯，須要maven

mvn package

3）

copy and unzip target/releases/elasticsearch-analysis-ik-{version}.zip to your-es-root/plugins/ik

4）restart elasticsearch

5）測試分詞例子
curl -XPUT http://101.201.115.106:9201/index

curl -XPOST http://101.201.115.106:9201/index/fulltext/_mapping -d'
{
    "fulltext": {
             "_all": {
            "analyzer": "ik_max_word",
            "search_analyzer": "ik_max_word",
            "term_vector": "no",
            "store": "false"
        },
        "properties": {
            "content": {
                "type": "text",
                "analyzer": "ik_max_word",
                "search_analyzer": "ik_max_word",
                "include_in_all": "true",
                "boost": 8
            }
        }
    }
}'
curl -XPOST http://101.201.115.106:9201/index/fulltext/1 -d'
{"content":"美國留給伊拉克的是個爛攤子嗎"}
'
curl -XPOST http://101.201.115.106:9201/index/fulltext/2 -d'
{"content":"公安部：各地校車將享最高路權"}
'
curl -XPOST http://101.201.115.106:9201/index/fulltext/3 -d'
{"content":"中韓漁警衝突調查：韓警平均天天扣1艘中國漁船"}
'
curl -XPOST http://101.201.115.106:9201/index/fulltext/4 -d'
{"content":"中國駐洛杉磯領事館遭亞裔男子槍擊 嫌犯已自首"}'
curl -XPOST http://101.201.115.106:9201/index/fulltext/_search  -d'
{
    "query" : { "match" : { "content" : "中國" }},
    "highlight" : {
        "pre_tags" : ["<tag1>", "<tag2>"],
        "post_tags" : ["</tag1>", "</tag2>"],
        "fields" : {
            "content" : {}
        }
    }
}
'三、安裝head，這個比較麻煩，須要安裝nodejs，npm，不像以前2.1版本，直接copy到plugin。

請參考http://hnr520.blog.51cto.com/4484939/1867033