Docker Technology Anatomy--docker Supervisor Management Process

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Using Supervisor to manage processes

The Docker container opens a single process at startup, such as an SSH or Apache daemon service. However, we often need to open multiple services on a machine, this can be many ways, the simplest is to put a number of startup commands in a startup script, start the time to start the script directly.

Example: Docker run–d mirroring/run.sh

The installation process management tool is also installed.

This section uses the Process Management tool supervisor to manage multiple processes in the container. Use Supervisor to better control, manage, and restart the processes we want to run.

Supervisor is a Process control system. It is a C/s system (Note: It provides a web interface to users to query and control), it allows users to monitor and control the process of Unix-like systems.

Here we demonstrate how to use both SSH and Apache services.

Configuration

First create a Dockerfile, and the contents and sections are explained below.

Create a directory of Dockerfile

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Dockerfile File Contents

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Supervisor Configuration File Contents

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The first paragraph Supervsord configures the software itself and runs using the Nodaemon parameter. Nodaemon=true If the True,supervisord process is running in the foreground, the default is False, which is to run the daemon in the daemons.

The following 2 paragraphs contain the 2 services we want to control. Each section contains a directory of services and commands to start the service

/docker/apache Directory Content List

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How to use

Create image

# docker Build-t Centos:supervisord .

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View image

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Start our Supervisor container.

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Testing: Accessing the Web and SSH services provided by the container

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Docker Technology Anatomy--docker Supervisor Management Process