Apostolos Fanakis
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4 years ago | |
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concordia-app | 4 years ago | |
concordia-contracts | 4 years ago | |
concordia-contracts-provider | 4 years ago | |
concordia-pinner | 4 years ago | |
env | 4 years ago | |
ganache | 4 years ago | |
Makefile | 4 years ago | |
README.md | 4 years ago | |
docker-compose.yml | 4 years ago |
README.md
Concordia Dockerized
This page provides information about the provided docker images, their configuration and supported deployment strategies.
TLDR: head down to Putting it all together/Scripts for a quick setup.
Services
Concordia requires at the minimum two services to work, a blockchain and a rendezvous server.
Additionally, the Concordia application code must be provided to the user. Currently, the only way of distributing the application code is via a webserver as a web application.
Ganache
Ganache is a personal blockchain software used during development. It is a very convenient way of developing and testing dApps. More information can be found in the project's website.
Note that any other Ethereum compliant blockchain can be used.
Rendezvous
Concordia uses a distributed database to store forum data. A rendezvous server is needed in order for users to discover peers in the network and get access to the data.
Application
The Concordia application is a React app that handles interactions with the contracts and the distributed database used.
Docker images
This repository provides docker images to easily setup (and destroy) instances of all required services Concordia. Furthermore, we provide an image that builds the contracts and handles their migration to the blockchain in use.
Ganache
The Dockerfile is provided in the path ./ganache
. The image makes use of the environment variables described
below.
Environment variable | Default value | Usage |
---|---|---|
ACCOUNTS_NUMBER | 10 | Set the number of accounts generated |
ACCOUNTS_ETHER | 100 | Set the amount of ETH assigned to each account |
MNEMONIC | NaN | The mnemonic phrase sued as a seed for deterministic account generation |
HOST | 0.0.0.0 | The hostname to listen on |
PORT | 8545 | The port to listen on |
NETWORK_ID | 5778 | The network id used to identify ganache |
Note that the Ganache instance running inside the container will save the generated blockchain keys in the path
/home/ganache_keys/keys.json
. If you need to access the keys (eg for getting a private key and importing in Metamask)
you can mount a volume to this path to have easier access.
Also, the database used by Ganache for storing blockchain information is placed in the path /home/ganache_db/
. You can
maintain the blockchain state between runs by mounting a volume to the database path. To do that, add the docker flag
-v host/absolute/path/to/ganache_db:/home/ganache_db
.
Rendezvous
The rendezvous server used here is js-libp2p-webrtc-star
. The server listens on port 9090. More information can be
found on the github page of the project here.
Contracts
This is a provision system that compiles and deploys the contracts to any Ethereum blockchain.
A Dockerfile is provided in the path ./concordia-contracts
that will build the contracts used by Concordia and
handle their deployment to any Ethereum network defined using env-vars upon container run. Dockerfile contains three
useful stages, described in the table below.
Stage name | Entrypoint | Usage |
---|---|---|
compile | Exits immediately | Compiles the contracts |
test | Runs contract tests | Compiles contracts and runs tests using blockchain defined by env vars |
runtime | Migrates contracts | Compiles contracts and migrates to the blockchain defined by env vars. Does not run tests |
The image makes use of the environment variables described below.
Environment variable | Default value | Usage |
---|---|---|
MIGRATE_NETWORK | develop | Set the network where the contracts will be deployed/tested (set this to "env" unless you know what you're doing) |
DEPLOY_CHAIN_HOST | NaN | Set the hostname of the blockchain network that will be used for deployment (requires network to be "env") |
DEPLOY_CHAIN_PORT | NaN | Set the port of the blockchain network that will be used for deployment (requires network to be "env") |
TEST_CHAIN_HOST | NaN | Set the hostname of the blockchain network that will be used for testing (requires network to be "env") |
TEST_CHAIN_PORT | NaN | Set the port of the blockchain network that will be used for testing (requires network to be "env") |
You can find the contract artifacts in the directory /usr/src/concordia/packages/concordia-contracts/build/
inside
the image.
Attention: make sure the targeted blockchain is up and running before trying to migrate the contracts.
Application
The Dockerfile provided in the path ./concordia-application
builds the application for production and serves
the resulting build using an nginx server. Dockerfile contains two useful stages, described in the table below.
Stage name | Entrypoint | Usage |
---|---|---|
test | Runs tests | Fetches npm packages and runs tests |
runtime | Serves application | Builds for production and serves it through nginx |
The image makes use of the environment variables described below.
Environment variable | Default value | Usage |
---|---|---|
REACT_APP_RENDEZVOUS_HOST | 127.0.0.1 | Set the hostname of the rendezvous server |
REACT_APP_RENDEZVOUS_PORT | 9090 | Set the port of the rendezvous server |
Attention: this image will copy the contract artifacts from the directory /packages/concordia-contracts/build
.
The image is bound the these artifacts after build. If the contracts change or get re-deployed the image must be
re-built to use the new artifacts.
Attention: make sure the contracts have been deployed before building this image. Also, make sure the rendezvous server is up and running.
Docker Compose
A docker-compose file also is provided. The docker-compose handles the lifecycle of the Ganache and Rendezvous server containers.
Putting it all together
You can find some ready to use scripts for common scenarios like dev deploys and testing in the ./docker
directory.
These scripts are documented in the following chapters.
Makefile targets
Concordia uses blockchain and other distributed technologies. There are a number of ways to set up a running instance of this application.
This chapter will guide you through simple setups for testing and production that depend on local blockchain (ganache) instances which do not require real ETH to work or have any other charges.
Testing the contracts
Build the ganache image and spin up a blockchain for testing:
make build-ganache run-ganache-test
Build the testing stage of the contracts image:
make build-contracts-tests
Run the tests:
make run-contracts-tests
The results should be printed in the terminal, but are also available in the directory ./reports/contracts
.
Testing the application
Build the testing stage of the application image:
make build-app-tests
Run the test:
make run-app-tests
The results should be printed in the terminal, but are also available in the directory ./reports/app
.
Production
Just run the target:
make run
And you' re done! Head to localhost:7777 and voilà, a working Concordia instance appears! The
blockchain is exposed in the address localhost:8545
.
Tip: the accounts (private keys) generated by Ganache are available in the file ./volumes/ganache_keys/keys.json
.
Note that the make run
command might take several minutes to execute (depending on your system). What happens under
the hood is that:
- the ganache image is built
- blockchain and rendezvous server containers are started
- migration stage of the contracts image is built
- the contracts are deployed to the blockchain:
- the application image is built and then deployed
Env Files
Targets in the Makefile make use of env files suffixed by .docker
located in the directory ./env
. Using this
environment variables, you can change various configuration options of the testing/production deploys.
Targets suffixed with host-chain
will try to use a blockchain and rendezvous server running in the host machine. They
use the --net=host
docker option and get the required environment variables from different env files,
./env/contracts.env
and ./env/concordia.env
(notice these env files don't include the .docker
). These env files do
not exist by default. The values set will largely depend on how you choose to run services in your system (which ports
you use etc.), so be sure to create them before running any host-chain
target. Luckily example files are provided.