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how-to-run-an-api-endpoint.md

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How to run an API Endpoint

Prerequisites

Install Docker

Install Docker Engine

Install docker-compose as well if it is not installed with Docker by default

Get the official Docker Image: iconloop/icon2-node

System Requirements 

CPU:  minimum 4core, recommend 8core +
RAM:  minimum 16GB, recommend 32GB + 
DISK : minimum SSD 1.5TB, recommend SSD 2TB + 
Network: minimum 1Gbps, recommend 2Gbps +

External Communications 
TCP 7100: TCP port used for peer-to-peer connection between peer nodes.
TCP 9000: JSON-RPC or RESTful API port serving application requests.P-Rep must allow TCP connections to port 7100 and 9000 of an external host. ( Use 0.0.0.0/0 for a source from any network )

Getting started

Open docker-compose.yml in a text editor and add the following content:

version: "3"
services:
   prep:
      image: iconloop/icon2-node
      container_name: "icon2-node"
      network_mode: host
      restart: "on-failure"
      environment:
         SERVICE: "MainNet"  # MainNet, SejongNet  ## network type 
         GOLOOP_LOG_LEVEL: "debug" # trace, debug, info, warn, error, fatal, panic          
         KEY_STORE_FILENAME: "INPUT_YOUR_KEY_STORE_FILENAME" # e.g. keystore.json read a config/keystore.json
         # e.g. "/goloop/config/keystore.json" read a "config/keystore.json" of host machine
         KEY_PASSWORD: "INPUT_YOUR_KEY_PASSWORD"
         FASTEST_START: "true"    # It can be restored from latest Snapshot DB.
         # You must enter your ICON1 node address. Recent blocks that are not in the backup DB are synchronized from your ICON1 node.
         MIG_ENDPOINT: "http://YOUR_ICON1_SERVER_IPADDR:9000"
     
         ROLE: 3 # Validator = 3, API Endpoint = 0

      cap_add:
         - SYS_TIME

      volumes:         
         - ./data:/goloop/data # mount a data volumes
         - ./config:/goloop/config # mount a config volumes ,Put your used keystore file here.     
         - ./logs:/goloop/logs

Start up

$ docker-compose pull && docker-compose up -d

To see the logs of the ICON2 node you can execute

$ tail -f logs/booting.log


$ tail -f logs/goloop.log

The directories(data, config, icon, logs …) are created by docker engine, but config directory needs to importing your keystore file.

.
├── docker-compose.yml 
├── config               # configuration files                         
│   └── keystore.json   # Import the your keystore file

├── data                # block data
│   ├── 1
│   ├── auth.json
│   ├── cli.sock
│   ├── ee.sock
│   └── rconfig.json

├── icon   # icon1 data for migrate. If a migration is completed, it will be auto-remove
│   └── migrator_bm
└── logs   # log files
    ├── booting.log   
    ├── health.log    # health state log
    ├── chain.log     # goloop chain action logs
    ├── download.log
    ├── download_error.log # download  
    └── goloop.log   # goloop's log file

Docker environments settings

Name default type required description
SERVICE MainNet str false Service Name - (MainNet, SejongNet)
ROLE 0 int true Role of running node. 0: Citizen, 3: P-Rep
CONFIG_URL str false
CONFIG_URL_FILE default_configure.json str false
CONFIG_LOCAL_FILE configure.json str false
IS_AUTOGEN_CERT false bool false Automatically generate certificates
FASTEST_START false bool false Download snapshot DB
KEY_STORE_FILENAME keystore.json str true keystore.json file name
KEY_PASSWORD str true password of keystore.json file
USE_NTP_SYNC True bool false Whether to use NTP in container
NTP_SERVER str false NTP Server
NTP_REFRESH_TIME int false ntp refresh time
SLACK_WH_URL str false slack web hook url - If a problem occurs, you can receive an alarm with a slack.
USE_HEALTH_CHECK True bool false Whether to use health check
CHECK_TIMEOUT 10 int false sec - TIMEOUT when calling REST API for monitoring
CHECK_PEER_STACK 6 int false sec - Stack value to check the peer for monitoring.
CHECK_BLOCK_STACK 10 int false sec - Stack value to check the block for monitoring.
CHECK_INTERVAL 10 int false sec - check interval for monitoring
CHECK_STACK_LIMIT 360 int false count - count- Restart container when stack value is reached
GOLOOP_LOG_LEVEL debug str false Log Level - (trace,debug,info,warn,error,fatal,panic
LOG_OUTPUT_TYPE file str false sec - check interval for monitoring