Sold by: ChromaWay - a relational blockchain
Deployed on AWS
Postchain pre-configured as a replica to Chromia mainnet network, based on Ubuntu 24.04.
Overview
A Chromia replica node is a critical component within the Chromia blockchain ecosystem, responsible for maintaining a complete copy of a dapp's dedicated blockchain. It helps ensure data redundancy, security, and availability by replicating all the transactions, blocks, and state data from the primary node. These nodes contribute to the network's resilience by allowing other participants to access the blockchain's data and participate in the consensus process, thereby enabling the decentralized operation and scaling of Chromia dapps.
This Marketplace AMI offering gets you a pre-configured Postchain node, allowing you to start replicating blockchains from existing Chromia networks in no time.
Highlights
- Postchain, the software powering Chromia, is already configured -- just run and go!
Details
Categories
Delivery method
Delivery option
64-bit (x86) Amazon Machine Image (AMI)
Latest version
Operating system
Ubuntu 24.04
Deployed on AWS
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Pricing
This product is available free of charge. Free subscriptions have no end date and may be canceled any time.
Additional AWS infrastructure costs may apply. Use the AWS Pricing Calculator to estimate your infrastructure costs.
Dimensions summary
This listing runs the Chromia Replica Node, software supporting a relational blockchain network. The software itself is free. You pay only for the AWS EC2 instance you choose to run it on, billed hourly. Six instance sizes are available across two families. The t3 and m6i options come in xlarge and 2xlarge sizes, while the m2 options come in xlarge and 2xlarge sizes. Each family offers different compute and memory profiles. Larger sizes within a family provide more resources per hour. Pick the size that fits your workload and cost needs.
Top-of-mind questions for buyers
The Chromia Replica Node software is free, so no software charges apply at any time. You pay only for the underlying AWS EC2 instance while it runs. Stopped or paused instances do not accrue hourly compute charges, though AWS storage fees for attached volumes may still apply.
The hourly rate covers the AWS EC2 instance that hosts the node, not the software itself. Each size maps to a set amount of compute (vCPU) and memory. The m2, t3, and m6i families offer different profiles. Larger sizes within a family provide more resources per hour.
No. The Chromia Replica Node software carries no license fee. Your only cost is the hourly EC2 instance charge for the size you select. Choosing a different family or size changes only the instance cost, since the software remains free across all six options.
chromaway.com
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Vendor refund policy
There is no payment involved in this AWS Marketplace offering, so no refunds are possible.
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Delivery details
64-bit (x86) Amazon Machine Image (AMI)
Amazon Machine Image (AMI)
An AMI is a virtual image that provides the information required to launch an instance. Amazon EC2 (Elastic Compute Cloud) instances are virtual servers on which you can run your applications and workloads, offering varying combinations of CPU, memory, storage, and networking resources. You can launch as many instances from as many different AMIs as you need.
Version release notes
Made it eaiser to replicate any chain on the Chromia mainnet.
Additional details
Usage instructions
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When the EC2 instance has started, find out the IP address of the machine and make an HTTP request to the /_debug endpoint on port 7750: curl http://<EC2 instance IP address>:7750/_debug
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In case making a request to port 7750 as described in step 1 does not work, please wait five minutes and then try again. The first time the replica node starts, it could take a little longer.
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Note down your node's public key, availabe in the "pubkey" field.
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Initially, directory chain will be synchronized from other nodes in the network. Watch as the value of the "height" field increases.
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When directory chain has synchronized, the cluster anchoring chain will synchronize. Watch as the value of the "height" field for the system anchoring chain increases.
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Towards a signer node in the system cluster, add your node as a replica to the blockchain you would like to replicate: $ pmc blockchain replica add
-brid <BRID of blockchain to replicate>
--pubkey <your node's public key> -
Set your local PMC configuration (~/.chromia/config) to point to your node: http://<EC2 instance IP>:7740/, and try to make queries to directory chain. You can try e.g. $ pmc blockchain list to verify that it works.
To dive into the logs or troubleshoot the node, you can sign in via SSH to the "ubuntu" user account. Elevate to root (sudo -i) and look at the "postchain" Docker container.
Please don't hesitate to write to aws_support@chromaway.com should you have questions or issues.
Support
Vendor support
Please don't hesitate to write to aws_support@chromaway.com should you have any questions or issues.
AWS infrastructure support
AWS Support is a one-on-one, fast-response support channel that is staffed 24x7x365 with experienced and technical support engineers. The service helps customers of all sizes and technical abilities to successfully utilize the products and features provided by Amazon Web Services.
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