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An article explaining how docker-compose creates a Flink environment

藏色散人

Dec 31, 2021 pm 02:59 PM

docker-compose

This article introduces how to build a Flink environment using docker-compose. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

docker-compose Introduction

docker-compose is a tool used to automate docker. With docker-compose, you can automate all complex docker operations with just one command.

In layman's terms, our usual operation of docker is still a very primitive series of actions. Your actions of manually using docker can be split into:

找到一个系统镜像 // docker search
安装好 vm 或者 virtual box // apt-get install docker
在 vm 中安装镜像 // docker run -d -it 你的镜像

This is the smallest action. If You have to map the hard disk, set up a NAT network or a bridged network, etc... You have to do more docker operations, which is obviously very inefficient.

But it’s fine if we write it in docker-compose.yaml. You only need to run docker-compose up -d after writing it to start.

Install docker-compse

Download the latest version of docker-compose file:

sudo curl -L https://github.com/docker/compose/releases/download/1.16.1/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose

Add executable permissions

sudo chmod +x /usr/local/bin/docker-compose

Test Installation results

docker-compose --version

Installation flink

In the specified directory, create a new docker-compose.yml file as follows:

version: "3"
services:
  jobmanager:
    image: flink:latest
    expose:
      - "6123"
    ports:
      - "8081:8081"
    command: jobmanager
    environment:
      - JOB_MANAGER_RPC_ADDRESS=jobmanager
  taskmanager:
    image: flink:latest
    expose:
      - "6121"
      - "6122"
    depends_on:
      - jobmanager
    command: taskmanager
    links:
      - "jobmanager:jobmanager"
    environment:
      - JOB_MANAGER_RPC_ADDRESS=jobmanager

The meaning of the file is, first Based on the latest flink image, start a jobmanager, and then start a taskmanager based on the jobmanager and flink image.

After the new creation is completed, docker-compose up in the current directory. Then visit localhost:8081 to view the results. Here 8081 is the port opened by jobmanager.

If the taskmanager page has configuration data, it means that flink has been deployed successfully.

Related recommendations: "docker usage tutorial"

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