本文主要講elasticsearch-2.2.1的安裝過程。

準備工作：

1.搭建虛擬機器

你需要先參考

hadoop2叢集環境搭建

把你的虛擬機器搭建起來-hadoop環境可以先不用搭建（完成步驟1到步驟8）

2.下載elasticsearch包

下載elasticsearch-2.2.1.tar.zip

這裡我搭建的是4臺虛擬機器(node1,node2,node3,node4)

elasticsearch 只允許普通使用者操作，不允許root使用者操作

--1.關閉防火牆
service iptables stop

--2.建立使用者elsearch
 

useradd elsearch
--3.給使用者elsearch設定密碼
passwd elsearch

--4.在/opt目錄下面建立elsearch/es/目錄
mkdir /opt/elsearch/es/

--5.進入到/opt目錄下面
cd /opt/

--6.把elsearch目錄以及裡面的子目錄的許可權設定為elsearch
chown -R elsearch：elsearch elsearch

--此時，/elsearch, /elsearch/es的許可權都應該為elsearch

--7.切換使用者到elsearch
su elsearch

此時，所有節點都應該是elsearch使用者，而不是root使用者。

現在去到node1節點上面進行操作

--此時，在node1上面操作
--1.此時，我們就可以把下載好的elasticsearch-2.2.1.tar.zip檔案上傳到node1下面的/opt/elsearch/es/
--2.解壓/opt/elsearch/es/elasticsearch-2.2.1.tar.zip檔案
cd /opt/elsearch/es/
unzip elasticsearch-2.2.1.tar.zip

--3.修改配置檔案
cd /opt/elsearch/es/elasticsearch-2.2.1
 
/conf/

vi 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 see the documentation for further information on configuration options:
# <http://www.elastic.co/guide/en/elasticsearch/reference/current/setup-configuration.html>
#
# ---------------------------------- Cluster -----------------------------------
#
# Use a descriptive name for your cluster:
#
cluster.name: elsearch-app
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
#
node.name: node1
#
# Add custom attributes to the node:
#
# node.rack: r1
#
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
#
# path.data: /path/to/data
#
# Path to log files:
#
# ----------------------------------- Memory -----------------------------------
#
# Lock the memory on startup:
#
# bootstrap.mlockall: true
#
# Make sure that the `ES_HEAP_SIZE` environment variable 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: 192.168.79.138
#
# Set a custom port for HTTP:
#
http.port: 9200
#
# For more information, see the documentation at:
# <http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-network.html>
#
#
# discovery.zen.ping.unicast.hosts: ["host1", "host2"]
#
# Prevent the "split brain" by configuring the majority of nodes (total number of nodes / 2 + 1):
#
# discovery.zen.minimum_master_nodes: 3
#
# For more information, see the documentation at:
# <http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-discovery.html>
#
# ---------------------------------- Gateway -----------------------------------
#
# Block initial recovery after a full cluster restart until N nodes are started:
#
# gateway.recover_after_nodes: 3
#
# For more information, see the documentation at:
# <http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-gateway.html>
#
# ---------------------------------- Various -----------------------------------
#
# Disable starting multiple nodes on a single system:
#
# node.max_local_storage_nodes: 1
#
# Require explicit names when deleting indices:
#
# action.destructive_requires_name: true
discovery.zen.ping.multicast.enabled: false
discovery.zen.ping.unicast.hosts: ["192.168.79.138","192.168.79.139", "192.168.79.140","192.168.79.141"]
discovery.zen.ping_timeout: 120s
client.transport.ping_timeout: 60s



:wq


--4.然後從node1分發到其他節點(node2, node3, node4)的相同目錄
cd /opt/elsearch/es
scp -r ./elasticsearch-2.2.1 elsearch@node2:/opt/elsearch/es
scp -r ./elasticsearch-2.2.1 elsearch@node3:/opt/elsearch/es
scp -r ./elasticsearch-2.2.1 elsearch@node4:/opt/elsearch/es

接下來在node2，node3，node4上面進行操作

--分別修改node2，node3，node4上面的配置檔案
cd /opt/elsearch/es/elasticsearch-2.2.1/conf/

vi elasticsearch.yml

--修改兩個地方
--1.node.name: node1
--2.network.host: 192.168.79.138

--修改為和下面相對應，然後儲存
192.168.79.138 node1
192.168.79.139 node2
192.168.79.140 node3
192.168.79.141 node4

最後，在所有節點（node1，node2，node3，node4）上面進行操作

--啟動elasticsearch
cd /opt/elsearch/es/elasticsearch-2.2.1/bin
./elasticsearch

開啟瀏覽器，輸入：node1:9200可以看見一下效果

新增外掛elasticsearch-head

下載elasticsearch-head

把下載好的外掛重新命名為

head

然後新增到所有節點（node1，node2，node3，node4）的

/opt/elsearch/es/elasticsearch-2.2.1/plugins

目錄。

然後重啟所有節點。

--啟動elasticsearch
cd /opt/elsearch/es/elasticsearch-2.2.1/bin
./elasticsearch

效果如下：

瞭解更多：elasticsearch-head

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