docker-compose 配置IP、hostname、hosts配置

配置IP

version: "3"
networks:
    bd-network:			# 聲明網(wǎng)絡(luò)
        external: true
services:
	kafka:				# 服務(wù)名稱
        networks:
            bd-network:	# 連接的網(wǎng)絡(luò)名稱
                ipv4_address: 172.2.0.102	# 配置IP

配置 主機(jī)名

version: "3"
services:
    kafka:     			# 服務(wù)名稱
        hostname: kf	# 主機(jī)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"

配置完成進(jìn)入容器，可查看驗(yàn)證

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

完整例子

1. 創(chuàng)建一個(gè)網(wǎng)絡(luò)

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

2. 配置 單節(jié)點(diǎn)kafka、zookeeper，kafka通過主機(jī)名 訪問zookeeper

version: "3"
networks:                                   #聲明網(wǎng)絡(luò)
    bd-network:
        external: true
services:
    zookeeper:                              # 服務(wù)名
        image: 'bitnami/zookeeper:latest'   # 鏡像
        container_name: zk-singleton        # 容器名
        hostname: zk                        # 主機(jī)名
        networks:
            bd-network:
                ipv4_address: 172.2.0.101   # 定義容器ip
        extra_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:                        # 容器環(huán)境配置
            - ALLOW_ANONYMOUS_LOGIN=yes     
    kafka:
        image: 'bitnami/kafka:latest'
        container_name: kf-singleton
        hostname: kf
        networks:
            bd-network:
                ipv4_address: 172.2.0.102
        extra_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           # 通過主機(jī)名訪問zookeeper
        depends_on:                         # 依賴
          - zookeeper

3 驗(yàn)證

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

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