etcd-cluster-example

docker-compose.yml

version: '3.9'

services:
  etcd1:
    container_name: etcd1
    build: 
      context: .
      dockerfile: Dockerfile
    environment:
      - NAME=etcd-1
      - DATADIR=/etcd-data
      - HOST=http://etcd1
      - CLUSTER=etcd-1=http://etcd1:2380,etcd-2=http://etcd2:2380
      - CLUSTERSTATE=new
      - TOKEN=kvl
    volumes:
      - ./etcd-data-1:/etcd-data
    networks:
      etcd-network:

  etcd2:
    container_name: etcd2
    build: 
      context: .
      dockerfile: Dockerfile
    environment:
      - NAME=etcd-2
      - DATADIR=/etcd-data
      - HOST=http://etcd2
      - CLUSTER=etcd-1=http://etcd1:2380,etcd-2=http://etcd2:2380
      - CLUSTERSTATE=new
      - TOKEN=kvl
    volumes:
      - ./etcd-data-2:/etcd-data
    networks:
      etcd-network:

networks:
  etcd-network:


# entrypoint: /etcd/etcd-v3.5.2-linux-amd64/etcd
# command:
#   - '--name=s1'
#   - '--data-dir=/etcd-data'
#   - '--listen-client-urls=http://0.0.0.0:2379'
#   - '--advertise-client-urls=http://0.0.0.0:2379'
#   - '--listen-peer-urls=http://0.0.0.0:2380'
#   - '--initial-advertise-peer-urls=http://0.0.0.0:2380'
#   - '--initial-cluster=s1=http://0.0.0.0:2380'
#   - '--initial-cluster-token=tkn'
#   - '--initial-cluster-state=new'

Dockerfile

FROM alpine

RUN apk update && apk add --no-cache tar

WORKDIR /etcd

RUN wget https://github.com/etcd-io/etcd/releases/download/v3.5.2/etcd-v3.5.2-linux-amd64.tar.gz
RUN tar -xvzf etcd-v3.5.2-linux-amd64.tar.gz
RUN rm -f etcd-v3.5.2-linux-amd64.tar.gz

WORKDIR /etcd/etcd-v3.5.2-linux-amd64 

CMD ./etcd --name ${NAME} \
    --data-dir=${DATADIR} \
    --initial-advertise-peer-urls ${HOST}:2380 --listen-peer-urls http://0.0.0.0:2380 \
    --advertise-client-urls ${HOST}:2379 --listen-client-urls http://0.0.0.0:2379 \
    --initial-cluster=${CLUSTER} \
    --initial-cluster-token=${TOKEN} \
    --initial-cluster-state=${CLUSTERSTATE}


# - '--name=s1'
# - '--data-dir=/etcd-data'
# - '--listen-client-urls=http://0.0.0.0:2379'
# - '--advertise-client-urls=http://0.0.0.0:2379'
# - '--listen-peer-urls=http://0.0.0.0:2380'
# - '--initial-advertise-peer-urls=http://0.0.0.0:2380'
# - '--initial-cluster=s1=http://0.0.0.0:2380'
# - '--initial-cluster-token=tkn'
# - '--initial-cluster-state=new'