Centos 安装和配置 Elasticsearch

Elasticsearch is a distributed RESTful search engine built for the cloud. Features include:

• Distributed and Highly Available Search Engine.
  Each index is fully sharded with a configurable number of shards.
  Each shard can have one or more replicas.
  Read / Search operations performed on any of the replica shards.
• Multi Tenant.
  Support for more than one index.
  Index level configuration (number of shards, index storage, …).
• Various set of APIs
  HTTP RESTful API
  Native Java API.
  All APIs perform automatic node operation rerouting.
• Document oriented
  No need for upfront schema definition.
  Schema can be defined for customization of the indexing process.
• Reliable, Asynchronous Write Behind for long term persistency.
• (Near) Real Time Search.
• Built on top of Lucene
  Each shard is a fully functional Lucene index
  All the power of Lucene easily exposed through simple configuration / plugins.
• Per operation consistency
  Single document level operations are atomic, consistent, isolated and durable.
• Open Source under the Apache License, version 2 (“ALv2”)

下载

Github: 点 这里

点击 这里 下载

[root@ubuntu ~]# wget -c https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.1.0.rpm

安装 Java

yum -y install java

安装

[root@ubuntu ~]# rpm -ivh elasticsearch-6.1.0.rpm
警告：elasticsearch-6.1.0.rpm: 头V4 RSA/SHA512 Signature, 密钥 ID d88e42b4: NOKEY
准备中...                          ################################# [100%]
Creating elasticsearch group... OK
Creating elasticsearch user... OK
正在升级/安装...
   1:elasticsearch-0:6.1.0-1          ################################# [100%]
### NOT starting on installation, please execute the following statements to configure elasticsearch service to start automatically using systemd
 sudo systemctl daemon-reload
 sudo systemctl enable elasticsearch.service
### You can start elasticsearch service by executing
 sudo systemctl start elasticsearch.service

执行

[root@ubuntu ~]# sudo systemctl daemon-reload
[root@ubuntu ~]# sudo systemctl enable elasticsearch.service
Created symlink from /etc/systemd/system/multi-user.target.wants/elasticsearch.service to /usr/lib/systemd/system/elasticsearch.service.
[root@ubuntu ~]# sudo systemctl start elasticsearch.service
[root@ubuntu ~]# sudo systemctl status elasticsearch.service
● elasticsearch.service - Elasticsearch
   Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; enabled; vendor preset: disabled)
   Active: active (running) since 四 2017-12-14 20:26:12 CST; 12s ago
     Docs: http://www.elastic.co
 Main PID: 9712 (java)
   CGroup: /system.slice/elasticsearch.service
           └─9712 /bin/java -Xms1g -Xmx1g -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+AlwaysPreTo...

12月 14 20:26:12 ubuntu.novalocal systemd[1]: Started Elasticsearch.
12月 14 20:26:12 ubuntu.novalocal systemd[1]: Starting Elasticsearch...

配置文件

[root@ubuntu ~]# vim /etc/elasticsearch/elasticsearch.yml

    [root@ubuntu ~]# cat /etc/elasticsearch/elasticsearch.yml
# ======================== Elasticsearch Configuration =========================
#
# NOTE: Elasticsearch comes with reasonable defaults for most settings.
#       Before you set out to tweak and tune the configuration, make sure you
#       understand what are you trying to accomplish and the consequences.
#
# The primary way of configuring a node is via this file. This template lists
# the most important settings you may want to configure for a production cluster.
#
# Please consult the documentation for further information on configuration options:
# https://www.elastic.co/guide/en/elasticsearch/reference/index.html
#
# ---------------------------------- Cluster -----------------------------------
#
# Use a descriptive name for your cluster:
#
#cluster.name: my-application # 集群名称
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
#
#node.name: node-1 # 节点信息
#
# Add custom attributes to the node:
#
#node.attr.rack: r1
#
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
#
path.data: /var/lib/elasticsearch # 数据存储路径
#
# Path to log files:
#
path.logs: /var/log/elasticsearch # 日志路径
#
# ----------------------------------- Memory -----------------------------------
#
# Lock the memory on startup:
#
#bootstrap.memory_lock: true
#
# Make sure that the heap size is set to about half the memory available
# on the system and that the owner of the process is allowed to use this
# limit.
#
# Elasticsearch performs poorly when the system is swapping the memory.
#
# ---------------------------------- Network -----------------------------------
#
# Set the bind address to a specific IP (IPv4 or IPv6):
#
#network.host: 192.168.0.1
#
# Set a custom port for HTTP:
#
#http.port: 9200 # 端口，默认9200
#
# For more information, consult the network module documentation.
#
# --------------------------------- Discovery ----------------------------------
#
# Pass an initial list of hosts to perform discovery when new node is started:
# The default list of hosts is ["127.0.0.1", "[::1]"]
#
#discovery.zen.ping.unicast.hosts: ["host1", "host2"]
#
# Prevent the "split brain" by configuring the majority of nodes (total number of master-eligible nodes / 2 + 1):
#
#discovery.zen.minimum_master_nodes:
#
# For more information, consult the zen discovery module documentation.
#
# ---------------------------------- Gateway -----------------------------------
#
# Block initial recovery after a full cluster restart until N nodes are started:
#
#gateway.recover_after_nodes: 3
#
# For more information, consult the gateway module documentation.
#
# ---------------------------------- Various -----------------------------------
#
# Require explicit names when deleting indices:
#
#action.destructive_requires_name: true

插入数据

[root@ubuntu ~]# curl -XPUT 'http://localhost:9200/twitter/doc/1?pretty' -H 'Content-Type: application/json' -d '
> {
>     "user": "kimchy",
>     "post_date": "2009-11-15T13:12:00",
>     "message": "Trying out Elasticsearch, so far so good?"
> }'
{
  "_index" : "twitter",
  "_type" : "doc",
  "_id" : "1",
  "_version" : 1,
  "result" : "created",
  "_shards" : {
    "total" : 2,
    "successful" : 1,
    "failed" : 0
  },
  "_seq_no" : 0,
  "_primary_term" : 1
}

获取数据

[root@ubuntu ~]# curl -XGET 'http://localhost:9200/twitter/doc/1?pretty=true'
{
  "_index" : "twitter",
  "_type" : "doc",
  "_id" : "1",
  "_version" : 1,
  "found" : true,
  "_source" : {
    "user" : "kimchy",
    "post_date" : "2009-11-15T13:12:00",
    "message" : "Trying out Elasticsearch, so far so good?"
  }
}

搜索数据

[root@ubuntu ~]# curl -XGET 'http://localhost:9200/twitter/_search?q=user:kimchy&pretty=true'
{
  "took" : 93,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : 2,
    "max_score" : 0.2876821,
    "hits" : [
      {
        "_index" : "twitter",
        "_type" : "doc",
        "_id" : "2",
        "_score" : 0.2876821,
        "_source" : {
          "user" : "kimchy",
          "post_date" : "2009-11-15T14:12:12",
          "message" : "Another tweet, will it be indexed?"
        }
      },
      {
        "_index" : "twitter",
        "_type" : "doc",
        "_id" : "1",
        "_score" : 0.2876821,
        "_source" : {
          "user" : "kimchy",
          "post_date" : "2009-11-15T13:12:00",
          "message" : "Trying out Elasticsearch, so far so good?"
        }
      }
    ]
  }
}