安装Install n8n - Open Source Workflow Automation - on Linux

What is n8n?

n8n is an extendable workflow automation tool. With a fair-code distribution model, n8n will always have visible source code, be available to self-host, and allow you to add your own custom functions, logic and apps. n8n's node-based approach makes it highly versatile, enabling you to connect anything to everything. -https://github.com/n8n-io/n8n

Installing n8n

1. Log into the Linux device
2. Run the following commands in a terminal window
   # update software repositories
   sudo apt update
   # install available software updates
   sudo apt upgrade -y
   # add nodejs software repository
   curl -sL https://deb.nodesource.com/setup_16.x | sudo bash -
   # install nodejs
   sudo apt install nodejs -y
   # install mariadb
   sudo apt install mariadb-server mariadb-client -y
   # configure the MySQL database
   sudo su
   mysql_secure_installation
3. Press Enter to login as root
4. Type N and press Enter to not switch to unix socket authentication
5. Type Y and press Enter to set a root password, type the password twice to confirm
6. Type Y and press Enter to remove anonymous users
7. Type Y and press Enter to disallow root login remotely
8. Type Y and press Enter to remove the test database
9. Type Y and press Enter to reload privilege tables
10. Run the following command to login into MySQL:
    mysql -u root -p
11. Authenticate with the root password set earlier
12. Run the following commands to create the n8n database and database user
    CREATE DATABASE n8n;
    GRANT ALL ON n8n.* to 'n8n_rw'@'localhost' IDENTIFIED BY 'n8n_N8N!';
    FLUSH PRIVILEGES;
    EXIT;
    exit
13. Continue with the following commands:
    # set environmental variables
    export DB_TYPE="mysqldb"
    export DB_MYSQLDB_DATABASE="n8n"
    export DB_MYSQLDB_HOST="localhost"
    export DB_MYSQLDB_USER="n8n_rw"
    export DB_MYSQLDB_PASSWORD="n8n_N8N!"
    export GENERIC_TIMEZONE="America/New_York"
    # install n8n
    sudo npm install n8n --location=global
    # audit and fix vulnerabilities
    sudo npm audit fix
    # run n8n
    n8n
14. Open a web browser and navigate to http://DNSorIP:5678
15. Complete the form with an email, first name, last name and password > Click next
16. Complete the questionnaire > Click continue
17. Click Get started
18. Welcome to n8n

Running n8n as a Service

1. Press CTRL+C to end the running n8n process
2. Continue with the following commands
   # create n8n service file
   sudo nano /etc/systemd/system/n8n.service
3. Paste the following configuration into n8n.service

   [Unit]
   Description=n8n
   After=mariadb.service

   [Service]
   User=root
   Group=root
   Environment=DB_TYPE=mysqldb
   Environment=DB_MYSQLDB_DATABASE=n8n
   Environment=DB_MYSQLDB_HOST=localhost
   Environment=DB_MYSQLDB_USER=n8n_rw
   Environment=DB_MYSQLDB_PASSWORD=n8n_N8N!
   Environment=GENERIC_TIMEZONE=America/New_York
   ExecStart=n8n
   WorkingDirectory=/usr/bin

   [Install]
   WantedBy=multi-user.target

4. Press CTRL+O, Enter, CTRL+X to write the changes
5. Continue with the following commands
   # reload systemd services
   sudo systemctl daemon-reload
   # start n8n service on boot and now
   sudo systemctl enable n8n --now
6. Back in the web browser, refresh n8n to verify it is now running a service
7. Log in using the email address and password setup earlier

Source: https://docs.n8n.io/hosting/installation/npm/