elasticsearch

安装教程

安装教程

常见问题

1. 启动 elasticsearch 异常 Failed to create node environment（解决）

chmod 777 挂载目录路径

2. elasticsearch 配置外网访问

# 进入  config/ elasticsearch.ym
# 修改：network.host: 127.0.0.1 或者内网Ip
http.host: 0.0.0.0

3. elasticsearch 启动报错，bootstrap checks failed

修改 elasticsearch.yml 配置文件，允许外网访问。增加 network.host: 0.0.0.0 ， 后启动失败，检查没有通过，报错如下：

[2018-05-18T17:44:59,658][INFO ][o.e.b.BootstrapChecks    ] [gFOuNlS] bound or publishing to a non-loopback address, enforcing bootstrap checks
ERROR: [2] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
[2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

a.  max file descriptors [65535] for elasticsearch process is too low, increase to at least [65536]<br />    编辑 `/etc/security/limits.conf`，追加以下内容；

* soft nofile 65536
* hard nofile 65536

此文件修改后需要重新登录用户，才会生效
b.  max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]<br />    编辑 `/etc/sysctl.conf`，追加以下内容：

vm.max_map_count=655360

保存后，执行：

sysctl -p

4. 后台启动

./elasearch -d

5. 安装中文分词器 IKAnalyzer

./elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.4.0/elasticsearch-analysis-ik-6.4.0.zip

6. Kibana server is not ready yet 出现的原因

a.  KB、ES版本不一致，把KB和ES版本调整为统一版本。
b. `kibana.yml` 中配置有问题

将配置文件kibana.yml中的elasticsearch.url改为正确的链接，默认为: http://elasticsearch:9200，改为http://自己的IP地址:9200

c. 浏览器没有缓过来，刷新几次浏览器。

7. elasticsearch 进行分词测试

https://blog.csdn.net/yexiaomodemo/article/details/97933870

POST http://IP地址:9200/_analyze
Content-Type: application/json
{
  "analyzer":"ik_max_word",
  "text":"今天天气真好"
}

返回成功结果

{
  "tokens": [
    {
      "token": "今天天气",
      "start_offset": 0,
      "end_offset": 4,
      "type": "CN_WORD",
      "position": 0
    },
    {
      "token": "今天",
      "start_offset": 0,
      "end_offset": 2,
      "type": "CN_WORD",
      "position": 1
    },
    {
      "token": "天天",
      "start_offset": 1,
      "end_offset": 3,
      "type": "CN_WORD",
      "position": 2
    },
    {
      "token": "天气",
      "start_offset": 2,
      "end_offset": 4,
      "type": "CN_WORD",
      "position": 3
    },
    {
      "token": "真好",
      "start_offset": 4,
      "end_offset": 6,
      "type": "CN_WORD",
      "position": 4
    }
  ]
}