For some great guides with code, see:
- Ethers.js: Enhancing blockchain data reliability with FallbackProvider
- Ethereum: BUIDLing a redundant event listener with ethers and web3.js
- Ethereum: How to set up a redundant event listener with Python
Introduction
When you have multiple nodes running in your Chainstack account, it's possible to leverage them as a load balancer to distribute incoming traffic evenly. This allows you to optimize your resources and ensure high availability of your application by eliminating a single point of failure.
Step-by-step guide
To use Chainstack node as a load balancer, follow the steps below:
Step 1: Set up multiple nodes
To use Chainstack as a load balancer, you will need to have multiple nodes running. To create a new node, follow these simple steps:
- Log in to your Chainstack account.
- Click on the "Nodes" tab in the top navigation menu.
- Click on "Create Node" and select your preferred blockchain protocol and cloud provider.
Repeat the above process to create additional nodes in the same configuration.
Step 2: Configure Load Balancing
Once you have multiple nodes running in your account, you can configure load balancing for incoming traffic by retrieving the list of endpoints for your Chainstack nodes. You can do this by calling the Chainstack API, which provides a list of endpoints for each node. You can then use this list to implement a round-robin load balancing algorithm in your application.
Example for node.js:
const axios = require('axios'); const endpoints = ['https://nd-321-654-987.p2pify.com/a440c7a115cdb81634e7375308ba1234', 'https://nd-321-654-987.p2pify.com/a440c7a115cdb81634e7375308ba1234', 'https://nd-321-654-987.p2pify.com/a440c7a115cdb81634e7375308ba1234']; let index = 0; const chainstackApi = axios.create({ baseURL: endpoints[index], }); function getNextEndpoint() { index++; if (index === endpoints.length) { index = 0; } return endpoints[index]; } chainstackApi.interceptors.response.use( (response) => response, (error) => { if (error.response && error.response.status === 429) { chainstackApi.defaults.baseURL = getNextEndpoint(); } return Promise.reject(error); } );
Step 3: Make API Requests
With the load balancer configured, you can now make API requests to the Chainstack API through the load balancer.
Example for Node.js:
chainstackApi.get('/v1/nodes').then((response) => { console.log(response.data); }).catch((error) => { console.error(error); });
Conclusion
By implementing load balancing in your application, you can distribute incoming traffic evenly across multiple Chainstack endpoints, ensuring high availability and performance of your application.
With these setup recommendations, you can quickly and easily configure a load balancer and make API requests through the load balancer in your application.
If you have any questions or concerns, please feel free to send an email support@chainstack.com or open a support ticket to our support team for assistance.
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