Docker ERROR: only one instance of "host" network is allowed [duplicate]

Question

I am trying to run a container where I need to user network driver as "host" instead of "bridge". I am running it on Centos machine and my docker-compose.yml is

version: '3.4'

services:
  testContainer:
    build:
      context: .
      args: 
        HADOOP_VERSION: 2.6.0
        HIVE_VERSION: 1.1.0
    image: testcontainer
    container_name: testcontainer
    hostname: testcontainer
    ports:
      - 9200:9200
      - 9300:9300
      - 5601:5601
      - 9001:9001
    ulimits:
      memlock:
        soft: -1
        hard: -1  
    networks:
      - elknet  

networks:
  elknet:
    driver: host

But i am getting the following error when I fire "docker-compose up" :

ERROR: only one instance of "host" network is allowed

Can anyone please suggest how can I use host network using docker-compose.yml.

Also note that if I use network_host as suggested by @larsks, I am still getting error

version: '3.4'

services:
  testContainer:
    build:
      context: .
      args: 
        HADOOP_VERSION: 2.6.0
        HIVE_VERSION: 1.1.0
    image: testcontainer
    container_name: testcontainer
    hostname: testcontainer
    ports:
      - 9200:9200
      - 9300:9300
      - 5601:5601
      - 9001:9001
    ulimits:
      memlock:
        soft: -1
        hard: -1  
    network_mode: host

I am getting following error

ERROR: The Compose file './docker-compose.yml' is invalid because: Unsupported config option for services: 'testContainer'

larsks · Accepted Answer · 2020-09-07 13:14:15Z

21

Get rid of the networks section in your docker-compose.yml, and add a network_mode directive to your service definition:

services:
  testContainer:
    build:
      context: .
      args: 
        HADOOP_VERSION: 2.6.0
        HIVE_VERSION: 1.1.0
    image: testcontainer
    container_name: testcontainer
    hostname: testcontainer
    ports:
      - 9200:9200
      - 9300:9300
      - 5601:5601
      - 9001:9001
    ulimits:
      memlock:
        soft: -1
        hard: -1  
    network_mode: host

answered Sep 7, 2020 at 13:14

larsks

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3 Comments

sanjeev kumar Over a year ago

@Iarsks It throws this error when I use "network_mode: host" ---> ERROR: The Compose file './docker-compose.yml' is invalid because: Unsupported config option for services: 'testContainer'

larsks Over a year ago

It looks like you're working with Docker Swarm, which has different behavior. Your question has been linked to a duplicate that has the answer you need.

Franco GIL Over a year ago

Hello, in my case I have to remove the section networks inside my service, in your example should be testContainer. Apparently the keywords networks and network_mode are mutual exclusive and won't live together on the same service.

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