CRON Docker

This docker is used for CRON blockchain

Installation

Hardware requirements

	Minimum	Recommended
System	Windows 10 Ubuntu 16.04/18.04 CentOS 7.4/7.6	Windows 10 Ubuntu 16.04/18.04 CentOS 7.4/7.6
CPU	Dual core	Quad core
Memory	8G	16G
Hard Disk	50G SSD hard drive	100G SSD hard drive

Install docker

sudo apt-get install -y \
    apt-transport-https \
    ca-certificates \
    curl \
    software-properties-common

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

sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

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

Install docker-compose

sudo curl -L https://github.com/docker/compose/releases/download/1.18.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
docker-compose --version

Setup seed(cron-node) using docker

Clone repository

# clone repository
git clone https://github.com/cronfoundation/cron-node.git
cd cron-node

Install make

# install make
sudo apt-get install make -y

Docker setup

# add docker network
sudo docker network create neo

# build docker image
sudo make build

# start seed node
sudo make run

# see running containers
sudo docker ps -a
sudo docker ps -a | grep cron

# access cron-cli
sudo make cli

# access bash inside docker 
sudo make exec

# curl request to api to see sync status, from inside docker, or from outside if ports are opened.
curl -d '{"jsonrpc": "2.0", "method": "getblockcount", "params": [], "id": 5}' localhost:10332

Open firewall ports

# 10333 - P2P communication, required for node synchronization
# 10332 - RPC-API access (WARNING! by opening this port if you have unlocked wallet everyone can access private key)
sudo ufw default deny incoming
sudo ufw default allow outgoing
sudo ufw allow ssh
sudo ufw allow 10333
sudo ufw allow 10332 #(WARNING! by opening this port if you have unlocked wallet everyone can access private key)
sudo ufw enable

Information

Folder structure inside docker

/neo-cli/Index_00A80801
/neo-cli/Chain_00A80801

Ports:
10331 - JSON-RPC via HTTPS
10332 - JSON-RPC via HTTP 
10333 - P2P via TCP
10334 - P2P via WebSocket

config.json
"Magic": 67827978 - for each blockchain this should be different, (67827978 = CRON in decimal) from this is created folder structure name "00A80801"
StandbyValidators - Masternode public keys
SeedList - Masternode and RPC node list

#(WARNING! by opening JSON-RPC port 10332 or 10331, if you have unlocked wallet everyone can access private key)

Cat Makefile for command shortcuts

cat Makefile

Edit config files

Config files will be copied to docker image in build stage

Edit config/config.json Edit config/protocol.json

Auth for RPC

To add RPC authentication capabilities, copy the contents of the file config/rpc_security_conf.json here /Plugins/RpcSecurity/config.json. In this case, the request to the node will change to this curl -d '{"jsonrpc": "2.0", "method": "getblockcount", "params": [], "id": 5}' admin:123@127.0.0.1:10332

kpeo/cron-node