准备环境
Network Requirements
The following network port configurations are required for the normal operation of each machine component：
| components | default port | description |
|---|---|---|
| DDHApplicationServer | 8081、2551、8586 | 8081 indicates the http server port，2551 indicates rpc communication port，8586 is a jmx port |
| WorkerApplicationServer | 2552、9100、8585 | 2552 indicates rpc communication port，8585 is a jmx port，9100 Indicates the port of the host data collector |
| nginx | 8888 | provide client ui communication port |
Client browser requirements
Chrome and newer versions of the Chrome kernel are recommended for accessing the front-end visual interface.
Disabling the Firewall
Disable the firewall on each host.
Configuring Hosts
Hosts must be configured for all machines in a big data cluster.
Configuring the Host Name： hostnamectl set-hostname host name
configuration /etc/hosts file
The password - free login is configured
Deployment machine，No secret login is required between the DataSophon node and the primary and secondary nodes of the big data service.
Generate an ssh key： ssh-keygen -m PEM -t rsa ，Press enter all the way.
Run the ssh-copy-id command to the destination host.
Environmental requirement
Jdk Environment Required Installation.You are advised to set the mysql version to 5.7.X and disable ssl.
Component Description
DDHApplicationServer is the API interface layer that is the web backend,responsible for handling front-end UI layer requests.The service provides RESTful apis to provide external request services.
WorkerApplicationServer executes the instructions sent by DDHApplicationServer，Commands for installing, starting, stopping, and restarting services are included.