#set java environment

export JAVA_HOME=/application/es/jdk

export JRE_HOME=${JAVA_HOME}/jre

export CLASSPATH=.:${JAVA_HOME}/lib/dt.JAVA_HOME/lib/tools.jar:${JRE_HOME}/lib

export PATH=${JAVA_HOME}/bin:${PATH}

source /etc/profile

[root@harlan_ansible ~]# vim /application/es/config/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-harlan   #配置集群的名称

#

# ------------------------------------ Node ------------------------------------

#

# Use a descriptive name for the node:

#

node.name: harlan_ansible     #本节点的名称，此主机的名称

#

# 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: /application/es/to/data      #日志存放地址

#

# Path to log files:

#

path.logs: /application/es/to/logs      #elasticsearch的本地日志

#

# ----------------------------------- 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: 0.0.0.0               #任意IP都可以访问elasticsearch

#

# Set a custom port for HTTP:

#

http.port: 9200                  #elasticsearch的访问端口

#

# For more information, consult the network module documentation.

#

# --------------------------------- Discovery ----------------------------------

#

# Pass an initial list of hosts to perform discovery when this node is started:

# The default list of hosts is ["127.0.0.1", "[::1]"]

#

#discovery.seed_hosts: ["host1", "host2"]

#

# Bootstrap the cluster using an initial set of master-eligible nodes:

#

cluster.initial_master_nodes: ["harlan_ansible"]      #开启集群的节点

#

# For more information, consult the discovery and cluster formation module documentation.

#

# ---------------------------------- Gateway -----------------------------------

#

# Block initial recovery after a full cluster restart until N nodes are started:

#

#gateway.recover_after_nodes:

#

# For more information, consult the gateway module documentation.

#

# ---------------------------------- Various -----------------------------------

#

# Require explicit names when deleting indices:

#

#action.destructive_requires_name: true

http.cors.enabled: true                  #下面这两个，是为了通过外网的浏览器访问

http.cors.allow-origin: "*"

useradd es

chown -R es.es /application/es

chown -R es.es /application/elasticsearch-7.3.

[es@harlan_ansible]$ su es

[es@harlan_ansible root]$ /application/es/bin/elasticsearch -d