1. Download and install
1) Environment preparation:
Operating system: centos7
es version: 8.8.1
jdk: 17
es is compatible with jdk, etc. Support view
2) Download the installation package and upload it to the server, the official website address https://www.elastic.co/cn/downloads/elasticsearch
3) Unzip the file
tar -zxvf elasticsearch-8.8.1-linux-x86_64.tar.gz
4) Start Elasticsearch
Enter the decompressed directory, enter the bin directory, and execute the command:
sh elasticsearch
# 守护进程方式
sh elasticsearch -d -p pid
Step on the pit
Start the error report and check the log to find
the reason: This is because Elasticsearch does not recommend running as the root user for security reasons. This is because running Elasticsearch as the root user can pose a potential security risk.
Solution: Create Elasticsearch users and groups:
sudo groupadd elasticsearch
sudo useradd -g elasticsearch elasticsearch
Change the ownership of the Elasticsearch directory:
#注意/usr/local/software/elasticsearch-8.8.1替换成自己解压es目录所在的位置
sudo chown -R elasticsearch:elasticsearch /usr/local/software/elasticsearch-8.8.1
Switch user and start elasticsearch
su elasticsearch
After switching, enter the bin directory and execute the startup command again sh elasticsearch.
5) Verify
Visit in the browser http://{服务器ip地址}:9200, if you can see a response in JSON format, which contains the version information of Elasticsearch, etc., it means that Elasticsearch has run successfully. Note that port 9200 is open.
Step on the pit:
Error when we visit
received plaintext http traffic on an https channel, closing connection Netty4HttpChannel{localAddress=/172.16.5.10:9200,
remoteAddress=/172.16.11.68:11111}
As shown in the figure:
Reason: Elasticsearch8 enables security authentication by default.
Solution: In the elasticsearch.yml configuration file under the config/ directory, change the security authentication switch from the original true to false to achieve password-free login access. Modify as shown in the figure:
