On a virtual server running Centos 7, the instructions explain how to install ELK Stack. (The ELK stack is an acronym used to represent a stack that comprises of three popular projects: Elasticsearch, Logstash, and Kibana.)
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What is ELK Stack?
Elasticsearch, Logstash, and Kibana are three open resource positions collectively abbreviated as “ELK”. Elasticsearch is an analytics and search engine. A server-side data processing pipeline called Logstash gathers data from multiple sources simultaneously, transforms it, and then sends the result to a “stock” like Elasticsearch. Users of Kibana may visualize data using Elasticsearch charts and graphs.
Initial requirements
4GB RAM and 2 CPUs are the bare minimum system requirements for ELK to function normally.
Java installation
Deploying an Elastic stack requires Java to be installed. Run the command line:yum -y install java-1.8.0
You can check the installed version with the command:java -version
Installing and configuring Elasticsearch
To download the Elasticsearch key, use the rpm command:
sudo rpm --import https://artifacts.elastic.co/GPG-KEY-elasticsearch
Add repository:
sudo vi /etc/yum.repos.d/elasticsearch.repo
Paste the following content into it and save the file:
[elasticsearch-6.x]
name=Elasticsearch repository for 6.x packages
baseurl=https://artifacts.elastic.co/packages/6.x/yum
gpgcheck=1
gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
enabled=1
autorefresh=1
type=rpm-md
Start the installation process:
sudo yum install elasticsearch
The configuration file must first be opened in the vi text editor before being edited:
vi /etc/elasticsearch/elasticsearch.yml
Uncomment the following line in the file:
bootstrap.memory_lock: true
Uncomment and set values for the following parameters:
network.host: localhost
http.port: 9200
Save your changes and close the text editor.
The next step is to edit the sysconfig configuration file for Elasticsearch:
vi /etc/sysconfig/elasticsearch
Uncomment the MAX_LOCKED_MEMORY setting and make sure it’s set to unlimited:
MAX_LOCKED_MEMORY=unlimited
Reboot the systems before starting the service to enable Elasticsearch to launch automatically:
systemctl daemon-reload
systemctl enable elasticsearch
systemctl start elasticsearch
Installing and configuring Kibana
Use wget to download Kibana 6.2.4 and then install it with the rpm command:
wget https://artifacts.elastic.co/downloads/kibana/kibana-6.2.4-x86_64.rpm
rpm -ivh kibana-6.2.4-x86_64.rpm
Next, you need to edit the Kibana configuration file:
vi /etc/kibana/kibana.yml
Uncomment the following lines and set the values:
server.port: 5601
server.host: "[IP-адрес вашего сервера]"
elasticsearch.url: "http://localhost:9200"
server.port: 5601
server.host: "123.234.123.234"
elasticsearch.url: "http://localhost:9200"
Start the Kibana service and set it to start automatically on boot:
systemctl enable kibana
systemctl start kibana
Open port 5601 to connect to the Kibana web interface:
sudo firewall-cmd --add-port=5601/tcp --permanent
sudo firewall-cmd --reload
Nginx setup
The NGINX web server must be installed on your virtual server, how to do this is written in our instructions .
Install additional tools for working with the web server:
yum install httpd-tools
Next, you need to create a new virtual host configuration file in the conf.d directory:
vi /etc/nginx/conf.d/[Домен или IP-адрес].conf
For example:
vi /etc/nginx/conf.d/123.234.123.234.conf
And insert the following data:
server {
listen 80; server_name [Домен или IP-адрес];
auth_basic "Restricted Access";
auth_basic_user_file /etc/nginx/htpasswd.kibana;
location / {
proxy_pass http://localhost:5601;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection 'upgrade';
proxy_set_header Host $host;
proxy_cache_bypass $http_upgrade;
}
}
Then create a new basic authentication file using the htpassw command. You will need to create a password for the admin user:
sudo htpasswd -c /etc/nginx/htpasswd.kibana admin
Restart the nginx server:
systemctl restart nginx
Installing and configuring Logstash
Download and install Logstash:
wget https://artifacts.elastic.co/downloads/logstash/logstash-6.2.4.rpm
rpm -ivh logstash-6.2.4.rpm
Once Logstash is installed, start the service:
systemctl restart logstash
systemctl enable logstash
Connecting to kibana
After completing the settings, connect to Kibana in the browser, to do this, go to the following link:
http://[IP-адрес вашего сервера]:5601
For example:
http://123.234.123.234:5601
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