elasticsearch5.2安装

1、下载elasticsearch-5.2.0.rpm

rpm -i  安装

安装后各个目录说明

#/usr/share/elasticsearch/               主目录
#/var/log/elasticsearch                   log日志

#/etc/sysconfig/elasticsearch          配置elasticsearch环境变量 
#/etc/elasticsearch/elasticsearch.yml  配置elasticsearch集群
#/etc/elasticsearch/jvm.options        配置elasticsearch的jvm参数
#/etc/elasticsearch/log4j2.properties  配置elasticsearch日志参数

elasticsearch启动命令
sudo -i service elasticsearch start
sudo -i service elasticsearch stop

启动报错1

es5.2无法启动bug
报错：
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


原因：
这是在因为Centos6不支持SecComp，而ES5.2.0默认bootstrap.system_call_filter为true进行检测，所以导致检测失败，失败后直接导致ES不能启动。


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


可以查看issues
https://github.com/elastic/elasticsearch/issues/22899

启动报错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]

编辑limits.conf 文件

vim /etc/security/limits.conf 

* soft nofile 65536
* hard nofile 65536

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

找到如下内容：

soft nproc 1024

修改为

soft nproc 2048

vi /etc/sysctl.conf

添加下面配置：

vm.max_map_count=655360

并执行命令：

sysctl -p

启动报错3

报找不到JAVA_HOME

找到#/etc/sysconfig/elasticsearch文件   配置elasticsearch环境变量 ，增加# Elasticsearch Java path
JAVA_HOME

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

2、安装ik

git网址

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

1）下载

checkout ik version respective to your elasticsearch version

git checkout tags/{version}

2）编译，需要maven

mvn package

3）

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

4）restart elasticsearch

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":"美国留给伊拉克的是个烂摊子吗"}
'
curl -XPOST http://101.201.115.106:9201/index/fulltext/2 -d'
{"content":"公安部：各地校车将享最高路权"}
'
curl -XPOST http://101.201.115.106:9201/index/fulltext/3 -d'
{"content":"中韩渔警冲突调查：韩警平均每天扣1艘中国渔船"}
'
curl -XPOST http://101.201.115.106:9201/index/fulltext/4 -d'
{"content":"中国驻洛杉矶领事馆遭亚裔男子枪击 嫌犯已自首"}'




curl -XPOST http://101.201.115.106:9201/index/fulltext/_search  -d'
{
    "query" : { "match" : { "content" : "中国" }},
    "highlight" : {
        "pre_tags" : ["<tag1>", "<tag2>"],
        "post_tags" : ["</tag1>", "</tag2>"],
        "fields" : {
            "content" : {}
        }
    }
}
'

3、安装head，这个比较麻烦，需要安装nodejs，npm，不像之前2.1版本，直接copy到plugin。

请参考http://hnr520.blog.51cto.com/4484939/1867033