eabili0/etcd-registrar

ETCD based node registrar with TTL for service discovery

etcd-registrar

This is an utility that could be used to register service nodes in an ETCD server with TTL so that you can query which nodes are alive from another client.

Usage

1. Create a docker-compose.yml

version: '3.5'

services:

  etcd-registrar1:
    build: .
    image: flaviostutz/etcd-registrar
    environment:
      - LOG_LEVEL=debug
      - ETCD_URL=http://etcd0:2379
      - ETCD_BASE=/webservers
      - SERVICE=test1
      - PORT=3000
      - TTL=60
      - INFO=

  etcd-list:
    build: .
    environment:
      - LOG_LEVEL=debug
      - ETCD_URL=http://etcd0:2379
      - ETCD_BASE=/webservers
      - SERVICE=test1
      - LIST=true

  etcd0:
    image: quay.io/coreos/etcd:v3.2.25
    environment:
      - ETCD_LISTEN_CLIENT_URLS=http://0.0.0.0:2379
      - ETCD_ADVERTISE_CLIENT_URLS=http://etcd0:2379

2. Run docker-compose up

Container ENVs

* LOG_LEVEL=debug
* ETCD_URL=http://etcd0:2379
* ETCD_BASE=/webservers
* SERVICE=test1
* PORT=3000
* TTL=60
* INFO={"weight":0.3,"address":"172.16.5.4"}

More

• Extract the executable from the container at /bin/etcd-registrar to run elsewhere

• For running this utility within a Go application, use github.com/flaviostutz/etcd-registry

• Command line flags:

etcd-registrar \
    --loglevel=info \
    --etcd-url=http://etcd0:2379 \
    --etcd-base=/myservices \
    --service=service1 \
    --PORT=3000 \
    --info={weight:0.3} \
    --ttl=60