centos7 搭建elastic search 集群 (三节点)

                       centos7 搭建elastic search 单机三节点集群

  一、实验拓扑图

   我们实验三个节点,一个主节点,两个从节点

     centos7 搭建elastic search 集群 (三节点)_第1张图片

 

  二、单机多节点配置

    elasticsearch集群配置比较简单,只需把每个节点的cluster name设置成相同的,es启动时会自动发现同一网段内相同cluster name的节点自动加入到集群中。

    要做到单机上开多个实例,需要修改ES的默认配置,以下是一些配置要点:

 

    

    

    node.max_local_storage_nodes

    这个配置限制了单节点上可以开启的ES存储实例的个数,我们需要开多个实例,因此需要把这个配置写到配置文件中,并为这个配置赋值为2或者更高。

   http.port

    这个配置是elasticsearch对外提供服务的http端口配置,默认情况下ES会取用9200~9299之间的端口,如果9200被占用就会自动使用9201,在单机多实例的配置中这个配置实际是不需要修改的。

   transport.tcp.port

    这个配置指定了elasticsearch集群内数据通讯使用的端口,默认情况下为9300,与上面的http.port配置类似,ES也会自动为已占用的端口选择下一个端口号。我们可以将第一个实例的tcp传输端口配置为9300,第二实例配置为9301

  

   把下载解压lasticsearch-5.5.2目录复制两份,三个文件夹分别命名为elasticsearch-5.5.2-node_1 elasticsearch-5.5.2-node_2 elasticsearch-5.5.2-node_3 按照上边的配置信息修改各个节点elasticsearch.yml配置文件

   

 

   elasticsearch-5.5.2-node_1的elasticsearch.yml配置如下:

   

复制代码

# ======================== 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: ictr_ElasticSearch
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
#
#换个节点名字
node.name: ictr_node1
node.master: true
#
# Add custom attributes to the node:
#
node.attr.rack: r1
#
#
#这个配置限制了单节点上可以开启的ES存储实例的个数,我们需要开多个实例,因此需要把这个配置写到配置文件中,并为这个配置赋值为2或者更高
node.max_local_storage_nodes: 3
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
#
#path.data: /path/to/data
#
# Path to log files:
#
#path.logs: /path/to/logs
#
# ----------------------------------- Memory -----------------------------------
#
# Lock the memory on startup:
#
#bootstrap.memory_lock: false
#bootstrap.system_call_filter: false
#
# 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: 127.0.0.1
#
# Set a custom port for HTTP:
#
http.port: 9200
#
transport.tcp.port: 9301
# 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: ["127.0.0.1:9301"]  #候选主节点地址
#
# Prevent the "split brain" by configuring the majority of nodes (total number of master-eligibl
#e nodes / 2 + 1):#
discovery.zen.minimum_master_nodes: 1
#
# 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

http.cors.enabled: true
http.cors.allow-origin: "*"

复制代码

elasticsearch-5.5.2-node_2和elasticsearch-5.5.2-node_2类似,的elasticsearch.yml配置如下:

复制代码

# ======================== 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: ictr_ElasticSearch
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
#
#换个节点名字
node.name: ictr_node2
node.master: false
#
# Add custom attributes to the node:
#
node.attr.rack: r1
#
#
#这个配置限制了单节点上可以开启的ES存储实例的个数,我们需要开多个实例,因此需要把这个配置写到配置文件中,并为这个配置赋值为2或者更高
node.max_local_storage_nodes: 3
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
#
#path.data: /path/to/data
#
# Path to log files:
#
#path.logs: /path/to/logs
#
# ----------------------------------- Memory -----------------------------------
#
# Lock the memory on startup:
#
bootstrap.memory_lock: false
bootstrap.system_call_filter: false
#
# 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: 127.0.0.1
#
# Set a custom port for HTTP:
#
http.port: 9202
#
transport.tcp.port: 9302
# 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: ["127.0.0.1:9301"]  #候选主节点地址
#
# Prevent the "split brain" by configuring the majority of nodes (total number of master-eligibl
#e nodes / 2 + 1):#
#discovery.zen.minimum_master_nodes: 1
#
# 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

http.cors.enabled: true
http.cors.allow-origin: "*"

复制代码

elasticsearch-5.5.2-node_3的elasticsearch.yml配置如下:

复制代码

# ======================== 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: ictr_ElasticSearch
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
#
#换个节点名字
node.name: ictr_node3
node.master: false
#
# Add custom attributes to the node:
#
node.attr.rack: r1
#
#
#这个配置限制了单节点上可以开启的ES存储实例的个数,我们需要开多个实例,因此需要把这个配置写到配置文件中,并为这个配置赋值为2或者更高
node.max_local_storage_nodes: 3
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
#
#path.data: /path/to/data
#
# Path to log files:
#
#path.logs: /path/to/logs
#
# ----------------------------------- Memory -----------------------------------
#
# Lock the memory on startup:
#
bootstrap.memory_lock: false
bootstrap.system_call_filter: false
#
# 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: 127.0.0.1
#
# Set a custom port for HTTP:
#
http.port: 9203
#
transport.tcp.port: 9303
# 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: ["127.0.0.1:9301"]  #候选主节点地址
#
# Prevent the "split brain" by configuring the majority of nodes (total number of master-eligibl
#e nodes / 2 + 1):#
#discovery.zen.minimum_master_nodes: 1
#
# 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

http.cors.enabled: true
http.cors.allow-origin: "*"

复制代码

  三、windows启动节点

    分别启动三个elasticsearch实例:

    centos7 搭建elastic search 集群 (三节点)_第2张图片

      centos7 搭建elastic search 集群 (三节点)_第3张图片

 

  4、访问浏览器

    http://127.0.0.1:9100/

    centos7 搭建elastic search 集群 (三节点)_第4张图片

    centos7 搭建elastic search 集群 (三节点)_第5张图片

五、linux 下启动 节点

es 默认启动时候占用 内存2G, 内存不足会导致启动失败,我们可以修改 config 文件下的jvm.options 的 jvm 参数    

vim jvm.options

centos7 搭建elastic search 集群 (三节点)_第6张图片

su root

chown  -R dzx:dzx   /usr/local/elasticsearch-5.3.1/bin/elasticsearch

su dzx

./elasticsearch-5.3.1/bin/elasticsearch

注意:elasticsearch root 用户无法启动,需要用普通用户启动。

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