Ankur Mahajan's questions

I am facing a weird issue with the docker networks. I am using an external network of bridge type named extenal_network in my docker containers with auto-restart enabled. I am not able to access my host network if any of the containers restarts due to some error may code or infra related.

Please refer attached screenshot for more clarity.

I've tried the below links but no luck.

• https://superuser.com/questions/1336567/installing-docker-ce-in-ubuntu-18-04-breaks-internet-connectivity-of-host
• https://success.docker.com/article/how-do-i-influence-which-network-address-ranges-docker-chooses-during-a-docker-network-create
• https://forums.docker.com/t/cant-access-internet-after-installing-docker-in-a-fresh-ubuntu-18-04-machine/53416

Dockerfile

FROM node:10.20.1-alpine
RUN apk add --no-cache python make g++
WORKDIR /home/app
COPY package.json package-lock.json* ./
RUN npm install
COPY . .

Docker-Compose

version: "3"
services:
  app:
    container_name: app
    build:
      context: ./
      dockerfile: Dockerfile
    image: 'network_poc:latest'
    ports:
      - 8080:8080
    deploy:
      resources:
        limits:
          memory: 2G
    networks:
      - extenal_network
    restart: always
    command: node index.js

networks:
  shared_network:
    external:
      name: extenal_network

docker inspect extenal_network

[
    {
        "Name": "extenal_network",
        "Id": "96476c227ddc14aa23d376392d380b2674fcbad109c90e7436c0cddd5c0a9ac5",
        "Created": "2020-04-14T00:17:10.89980675+05:30",
        "Scope": "local",
        "Driver": "bridge",
        "EnableIPv6": false,
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "172.18.0.0/16",
                    "Gateway": "172.18.0.1"
                }
            ]
        },
        "Internal": false,
        "Attachable": false,
        "Ingress": false,
        "ConfigFrom": {
            "Network": ""
        },
        "ConfigOnly": false,
        "Containers": {
            "7621a2b5a7e460a905bf86c427aea38b6374ac621c0c1a2b9eca4b671aea4dfe": {
                "Name": "app",
                "EndpointID": "04e9d14a17af05eb7a2b478526365cbce7f726a62f5e2cd315244c2639891b1e",
                "MacAddress": "**:**:**:**:**:**",
                "IPv4Address": "172.18.0.2/16",
                "IPv6Address": ""
            }
        },
        "Options": {},
        "Labels": {}
    }
]

Any help or suggestion is highly appreciable.