🕵️ TenderDuty for Node Monitoring

TenderDuty is a robust tool for monitoring blockchain nodes, providing insights into network height, validator status, uptime, signed blocks, and transmitted blocks. It also supports alerts via Telegram and Discord for effective monitoring.

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Preparing the Environment

Start by updating your server and installing the necessary dependencies:

sudo apt update && sudo apt upgrade -y
sudo apt install curl git wget jq make gcc tmux htop pkg-config libssl-dev tar clang unzip -y

Installing Docker

Docker is required to run TenderDuty. Follow these steps to install it:

Add the Docker repository key:

curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -

Add the Docker repository:

sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable"

Install Docker:

sudo apt update && sudo apt install docker-ce -y

Verify the installation:

docker --version

Setting Up TenderDuty

Create a dedicated directory for TenderDuty and set up the configuration.

Create the directory and navigate to it:

mkdir $HOME/tenderduty && cd $HOME/tenderduty

Download the example configuration file:

docker run --rm ghcr.io/blockpane/tenderduty:latest -example-config > config.yml

Edit the configuration file:

nano $HOME/tenderduty/config.yml

Customize the configuration:

• Replace celestia with your project name.

• Update the chain_id (e.g., replace mocha-4 with your chain ID, such as testnet-1).

• Enter your validator address in the valoper_address field.

• Update the url field with the RPC address of your node, such as tcp://localhost:26657.

Running TenderDuty

Launch TenderDuty as a Docker container using the following command:

docker run -d --name tenderduty -p "8888:8888" --restart unless-stopped \
    -v $(pwd)/config.yml:/var/lib/tenderduty/config.yml \
    ghcr.io/blockpane/tenderduty:latest

Securing the Server

To protect your server, configure a firewall.

Install the ufw firewall if not already installed:

sudo apt install ufw

Set up firewall rules:

sudo ufw default allow outgoing
sudo ufw default deny incoming
sudo ufw allow ssh/tcp
sudo ufw limit ssh/tcp
sudo ufw allow 8888/tcp
sudo ufw enable

You can now access the TenderDuty dashboard in your browser at: http://<YOUR_SERVER_IP>:8888.

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Configuring Telegram Notifications

To configure, use this documentation.

To enable notifications in Telegram:

1. Create a Telegram bot using @BotFather and save the API token.

2. Create a Telegram group, add the bot to the group, and retrieve the group ID.

3. Edit the configuration file:

   nano $HOME/tenderduty/config.yml

4. Modify the Telegram section:

   telegram:
     enabled: yes
     api_key: '<YOUR_BOT_API_KEY>'
     channel: '<YOUR_GROUP_ID>'

Restarting TenderDuty

Apply the configuration changes by restarting the Docker container:

docker restart tenderduty

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TenderDuty is now fully installed and configured. Monitor your node status, receive real-time alerts, and manage everything via the web interface.