Introduction: elasticsearch as a distributed Lucene-based search engine, power of its search function Needless to say, while elasticsearch-head node as a project, can easily manage the cluster configuration elasticsearch

Installation elasticsearch

1. Download and extract the resource kit installed

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.2.4.tar.gz
tar -zxvf elasticsearch-6.2.4.tar.gz -C / usr / local / -C extracted to represent the specified directory

2, because the root account is not allowed es start in 5 versions, so you need to create a user

es useradd 
chown -R es: es /usr/local/elasticsearch-6.2.4 given user rights assigned to extracted directory

3, modify configuration files es

Modify ip and port numbers
Possible error solutions (should be carried out under the root user to modify the time) when you start

　　　 vim /etc/security/limits.conf

Hard nofile 65536 * 
* Soft nofile 65536 // * denotes any user, it can also be written as users start es

vim /etc/security/limits.d/20-nproc.conf

* soft nproc 4096
* hard nproc 4096
root soft nproc unlimited
root hard nproc unlimited

　　　　 vim /etc/sysctl.conf file is added at the end of vm.max_map_count = 2621441

3, if you want to start in the background, you can use ./elasticsearch -d (of course, in the bin directory)

4, Elasticsearch multi-node configuration

　　a) a main node configurations (only one node)

Cluster # Name 
cluster.name: Demon # Node IP 
network.host: // 192.168.184.131 native IP # Name node node.name: elk-1 position of the storage of data # Path.Data: / Data / ES-Data # storage location running log of










 path.logs: / var / log / elasticsearch

 locked memory at startup # 
bootstrap.memory_lock: to true

# Node port 
http.port: 9200 

# whether to support cross-domain 
http.cors.enabled: to true 

# * support all domain names 
http.cors.allow-origin: "*"

　　a +) master node configuration (multiple nodes)

# Node name 
node.name: Master 

# Is there a master node qualified 
node.master: to true 

# cluster name 
cluster.name: elasticsearch 

# node ip 
network.host: 192.168.184.131

Node # Name
 node.name: Elk. 1- 

# data storage location
 Path.Data: / Data / ES-Data 

# operation log storage location
 path.logs: / var / log / elasticsearch 

lock memory when the startup # 
bootstrap.memory_lock: true

# Node port http.port: 9200 transport.tcp.port: 9300 #master minimum number discovery.zen.minimum_master_nodes: 1 # node list of the default port 9300, non 9300 need to bring a port number, automatically poll found discovery.zen. ping.unicast.hosts: [ " 192.168.184.131 : 9300", "192.168.184.131:9301","192.168.184.131:9302"] 

# support cross-domain 
http.cors.enabled: true

# * Support all domain names 
http.cors.allow-origin: "*"

　　b) the child node configuration, remember to copy the entire file elasticsearch, to delete a file in the data directory, directory or data manually set separately

Installation elasticsearch-head plug

The relevant version: Elasticsearch: 6.2.4 node: 10.16.0 jdk: 1.8

Installation node

1, download resources wget https://nodejs.org/dist/v10.16.0/node-v10.16.0-linux-x64.tar.xz

2, extract the tar -xf node-v10.16.0-linux-x64.tar.xz

3, rename mv node-v10.16.0-linux-x64 nodejs

4, establish a soft link ln -s / usr / local / nodejs / bin / node / usr / local / bin

ln -s /usr/local/nodejs/bin/npm /usr/local/bin

5, using the node -v view node version

Installation elasticsearch-head plug

1, clone resources in the git: git clone git: //github.com/mobz/elasticsearch-head.git

2, elasticsearch-head into the directory: cd elasticsearch-head /

3, installed using npm install

　　　　Errors and solutions a) during Installation

i. phantomjs manually install

1. 1. Before that you need to install bz2, use yum install
    1. yum search bzip2 // Query installation package　　
    2. yum -y install bzip2.x86_64
  2. Decompression: tar -xjvf /tmp/phantomjs/phantomjs-2.1.1-linux-x86_64.tar.bz2 -C / data
  3. Soft establish the connection: ln -s /data/phantomjs-2.1.1-linux-x86_64/bin/phantomjs / usr / bin
  4. Use phantomjs -v view the installed version