N8N Docker Set Up

Login to Dev Server

eg: Putty to 192.168.1.109

Install Docker:

Step 1: Uninstall Old Docker Versions (Optional, but Recommended)

If you have any old or unofficial Docker packages installed, it's best to remove them first. If you're sure you don't, you can skip this.

Bash

sudo apt-get remove docker docker-engine docker.io containerd runc

Step 2: Update Package Index and Install Prerequisites

These packages are needed to allow apt to use a repository over HTTPS and to manage software properties.

Bash

sudo apt-get update
sudo apt-get install -y \
    ca-certificates \
    curl \
    gnupg \
    lsb-release \
    software-properties-common \
    apt-transport-https

Your initial attempt at this was mostly okay but got a bit tangled later. This single command should cover the necessary prerequisites.

Step 3: Add Docker’s Official GPG Key

This key is used to verify the authenticity of the Docker packages.

Bash

sudo mkdir -p /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
sudo chmod a+r /etc/apt/keyrings/docker.gpg

Step 4: Set Up the Docker Stable Repository

This command adds Docker's official APT repository to your system's list of sources.

Bash

echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
  $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

(Make sure there's a space after echo and before the opening double quote. This was the main issue in your attempt.)

Step 5: Update Package Index Again

Now that Docker's repository has been added, update apt's package index so it knows about the new Docker packages.

Bash

sudo apt-get update

You should see lines in the output referring to https://download.docker.com/linux/ubuntu.

Step 6: Install Docker Engine, CLI, containerd, and Docker Compose Plugin

This command installs the latest stable version of Docker and the Docker Compose plugin (which allows you to use docker compose with a space).

Bash

sudo apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

• If you get an error here saying a package can't be found, double-check that Step 4 and 5 completed without error and that the Docker repository was indeed added and updated.

Step 7: Verify Docker Installation

Check that Docker Engine is installed and running correctly.

Bash

sudo docker run hello-world

This will download and run a small test image. If it works, you'll see a confirmation message.

Also, check the versions:

Bash

docker --version
docker compose version

(Note the space in docker compose for the plugin version).

Step 8: Manage Docker as a Non-Root User (Highly Recommended)

To avoid having to type sudo for every Docker command: a. Add your user to the docker group (the group might already exist): bash sudo usermod -aG docker ${USER} (Replace ${USER} with your actual username if it's not automatically picked up, e.g., sudo usermod -aG docker hexucation)

b. For this change to take effect, you need to log out and log back in, or you can activate the group change for your current terminal session with: bash newgrp docker (Note: newgrp docker starts a new shell. You might prefer to just open a new terminal window after logging out and back in).

c. After logging back in or starting a new session/terminal, verify you can run Docker commands without sudo: bash docker run hello-world

Follow these steps carefully, ensuring each command completes successfully before moving to the next. Pay close attention to spaces and exact commands, especially for Step 4. This should get Docker and Docker Compose (plugin) installed correctly on your Ubuntu 20.04 system.

Install Docker Compose

sudo apt install docker-compose-plugin

Verify Installation

Check if the plugin is installed:

bash

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docker compose version

Use docker compose Command

Try running your Compose file again:

bash

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docker compose up

NGINX Example

1. Install NGINX:

bash

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sudo apt install nginx

Configure NGINX for n8n: Create a file /etc/nginx/sites-available/n8n with the following content:

nginx

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server { listen 80; server_name public-domain>; location / { proxy_pass http://localhost:5678; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Proto $scheme; client_max_body_size 50M; } }

Enable the site and reload NGINX:

bash

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sudo ln -s /etc/nginx/sites-available/n8n /etc/nginx/sites-enabled/ sudo nginx -t sudo systemctl reload nginx

If you get an 400 error this is the fix:

server {

  # Existing configuration...

  client_header_buffer_sTest the configuration for syntax errors:

bash

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sudo nginx -t

Reload NGINX to apply changes:

bash

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sudo systemctl reload nginx

ize 16k;

  large_client_header_buffers 4 32k;

}