docker-compose 配置IP、hostname、hosts配置

配置IP

version: "3"
networks:bd-network:			# 声明网络external: true
services:kafka:				# 服务名称networks:bd-network:	# 连接的网络名称ipv4_address: 172.2.0.102	# 配置IP

配置 主机名

version: "3"
services:kafka:     			# 服务名称hostname: kf	# 主机名

配置hosts

下面的配置可以修改/etc/hosts文件: 追加zk 172.2.0.101 、kf 172.2.0.102

version: "3"
services:kafka:extra_hosts:- "zk:172.2.0.101"- "kf:172.2.0.102"

配置完成进入容器，可查看验证

$ sudo docker exec -it zk-singleton /bin/bash
$ cat /etc/hosts

完整例子

1. 创建一个网络

$ sudo docker network create --driver=bridge --gateway=172.2.0.1 --subnet=172.2.0.0/16  bd-network

2. 配置 单节点kafka、zookeeper，kafka通过主机名 访问zookeeper

version: "3"
networks:                                   #声明网络bd-network:external: true
services:zookeeper:                              # 服务名image: 'bitnami/zookeeper:latest'   # 镜像container_name: zk-singleton        # 容器名hostname: zk                        # 主机名networks:bd-network:ipv4_address: 172.2.0.101   # 定义容器ipextra_hosts:- "zk:172.2.0.101"- "kf:172.2.0.102"ports:                              # 宿主端口:容器端口映射- '2181:2181'environment:                        # 容器环境配置- ALLOW_ANONYMOUS_LOGIN=yes     kafka:image: 'bitnami/kafka:latest'container_name: kf-singletonhostname: kfnetworks:bd-network:ipv4_address: 172.2.0.102extra_hosts:- "zk:172.2.0.101"- "kf:172.2.0.102"ports:- '9192:9092'environment:- KAFKA_BROKER_ID=1- ALLOW_PLAINTEXT_LISTENER=yes- KAFKA_CFG_LISTENERS=PLAINTEXT://:9092- KAFKA_CFG_ADVERTISED_LISTENERS=PLAINTEXT://:9092- KAFKA_CFG_ZOOKEEPER_CONNECT=zk:2181           # 通过主机名访问zookeeperdepends_on:                         # 依赖- zookeeper

3 验证

$ sudo docker exec -it kf-singleton /bin/bash
$ hostname
$ cat /etc/hosts