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  • How to turn off the firewall of a docker container
    How to turn off the firewall of a docker container
    Docker is a powerful containerization platform that helps developers build, deploy and run applications faster. Docker containers have a firewall enabled by default to protect applications in the container from outside attacks. However, in some cases, you need to turn off the firewall for Docker containers. This article will explain how to turn off the firewall of Docker containers. 1. Check the firewall status of the Docker container. Before turning off the firewall of the Docker container, we need to check the Docker container first.
    Docker 8367 2023-04-17 15:41:52
  • How to solve the problem that the docker container cannot connect to the host database
    How to solve the problem that the docker container cannot connect to the host database
    With the rapid development of cloud computing, big data, artificial intelligence and other technologies, containerization technology has gradually become a very important part of enterprise projects, because the lightweight and rapid deployment of containers can effectively improve development efficiency and shorten delivery cycles. ,cut costs. However, in the process of using container technology, we often encounter some problems. One of the typical problems is that the container cannot connect to the host database. 1. Problem Description When using containerization technology for project development, it is usually necessary to interact with the host's database. But sometimes, we will find that the container has no
    Docker 2197 2023-04-17 15:43:11
  • A brief analysis of how to create HDFS file system in Docker
    A brief analysis of how to create HDFS file system in Docker
    How Docker Creates a File System in HDFS With the increase in large-scale data, more and more companies are turning to Hadoop Distributed File System (HDFS) as their data storage solution. HDFS is a highly scalable distributed file system based on Java with features such as high availability and fault tolerance. However, for system administrators and developers who want to run HDFS in Docker containers, creating an HDFS file system is not an easy task.
    Docker 1018 2023-04-17 15:45:19
  • How to install JDK in Docker container
    How to install JDK in Docker container
    Docker is an open source containerization platform that makes it easier for developers to build, publish and run applications. JDK is an important foundation for today's Java program development, and installing JDK is a necessary step for Java program development. This article will introduce how to install JDK in a Docker container. Step 1: Download the JDK from the official source. To install the JDK in the Docker container, we need to download the binary file of the JDK. You can download the JDK from the official source or from the mirror source. This article takes the official source as an example:```R
    Docker 6506 2023-04-17 15:48:24
  • Can docker run a program?
    Can docker run a program?
    Docker has become more and more widely used in today's technology field. Docker, with containerization technology as its core, can run applications in containers, allowing developers to build, deliver and run applications on any platform. So, here comes the question: Can Docker run a program? Simply put, the answer is yes. Docker allows users to run almost any type of application within a container, including web applications, databases, backend services, CLI tools, and more. However, to understand why Docker can run
    Docker 933 2023-04-14 17:38:20
  • How to capture the incoming and outgoing messages of a Docker container
    How to capture the incoming and outgoing messages of a Docker container
    Docker is a containerization technology that can be used to quickly deploy and run applications. However, during actual operation, we sometimes need to understand the incoming and outgoing messages of the Docker container to better monitor and manage the container. This article will introduce how to capture the incoming and outgoing packets of the Docker container, including using tcpdump and Wireshark to capture packets. 1. Use tcpdump to capture packets 1. Install tcpdump. Use the following command to install tcpdum on a Linux system.
    Docker 1586 2023-04-11 09:25:57
  • How many dockers can be installed in 32g of memory?
    How many dockers can be installed in 32g of memory?
    With the rapid development of cloud computing and containerization technologies, more and more enterprises and developers are beginning to use Docker to deploy and manage applications. For users who use Docker, an important issue is how to reasonably configure the hardware resources of the host to improve the efficiency of Docker. Among them, memory is a crucial resource, because Docker containers need to occupy a certain amount of memory space when running. In actual deployments, it is common to use a server with 32GB of memory to run multiple Docker containers. Well, we can
    Docker 1380 2023-04-11 09:19:28
  • How to install software libraries in docker images (step analysis)
    How to install software libraries in docker images (step analysis)
    Docker is currently the most popular lightweight containerization technology, which allows developers to easily and quickly build, deploy and run applications. As developers, we often need to install some applications or software libraries in Docker containers to support our development work. So, how to install the software library in the Docker image? Below, we will detail the steps to install the software library in the Docker image. Step 1: Choose the appropriate image First, choose the appropriate image according to your needs. An image is equivalent to a software package, in D
    Docker 1891 2023-04-10 14:25:44
  • How to stop Docker service
    How to stop Docker service
    Docker is a very popular containerization technology that makes it easier for developers to package applications into an independent container for easy deployment and management. However, in the process of using Docker, sometimes it is necessary to stop the Docker service. This article will introduce how to stop the Docker service. 1. Use the command line to stop the Docker service. Under Linux systems, we can use the command line to stop the Docker service. We can use the following command: ```sudo systemctl sto
    Docker 17917 2023-04-10 14:26:50
  • Where are Docker's system logs?
    Where are Docker's system logs?
    Where are Docker's system logs? Docker is a popular open source container engine that helps developers build, package and run applications more easily. Although Docker simplifies the management and deployment of applications, it is important to review Docker's system logs when encountering problems in development and production. Docker logs can be divided into two categories: container logs and daemon logs (Docker daemon). Container logs are log information recorded by each Docker container, including events that occur within the container.
    Docker 2527 2023-04-10 14:27:42
  • Detailed explanation of how to completely delete docker
    Detailed explanation of how to completely delete docker
    Docker is a lightweight and easy-to-manage containerization technology for applications and services. However, if you no longer need Docker, or need to clear the Docker environment to reinstall or upgrade the version, then you will need to completely remove Docker. This article will show you how to remove Docker completely. 1. Stop and delete all Docker containers. Before uninstalling Docker, you need to stop and delete all Docker containers from the host machine. Executing the following command will stop and delete all running Docker containers
    Docker 10197 2023-04-10 14:29:43
  • How to deploy a project into a Docker container
    How to deploy a project into a Docker container
    With the rapid development of cloud computing and container technology, more and more developers are beginning to package their applications into Docker images and deploy them to cloud platforms. Docker provides a lightweight virtualization technology that makes the deployment, operation and maintenance of applications more flexible and simpler for developers. This article explains how to deploy your project into a Docker container. 1. Install Docker Before deploying the project to a Docker container, you need to install Docker first. Docker supports various operating systems
    Docker 3308 2023-04-10 14:34:54
  • What is docker load? Why is there no more?
    What is docker load? Why is there no more?
    Docker is currently the most popular containerization platform, providing a convenient and highly portable solution for application deployment and management. Docker uses containerization technology to package an application and all its dependencies together and run it in any environment. It provides a fast, reliable and efficient way to deliver applications for organizations of all industries and sizes. When using Docker, an important operation is to load the Docker image onto the host machine so that the container can be run on it. In this process, sometimes you will encounter a
    Docker 2462 2023-04-10 14:35:46
  • Discuss some common causes that can cause Docker startup problems
    Discuss some common causes that can cause Docker startup problems
    Docker is one of the most popular containerization technologies today, and more and more developers are using it to deploy and run applications. However, sometimes you will encounter the problem of Docker not starting successfully, which may cause you a lot of trouble. In this article, we will discuss some common causes that can cause Docker startup problems and how to solve them. 1. Insufficient memory Docker may require a large amount of memory when starting, especially for larger images or containers. If your computer or server is low on memory, Docker won't be able to
    Docker 735 2023-04-10 14:39:41
  • How to solve docker ce startup failure
    How to solve docker ce startup failure
    Docker CE is one of the most widely used containerization technologies currently. It provides us with a fast, safe, and efficient deployment environment. However, when you use Docker CE, you may encounter some startup failure problems. Here are some possible reasons and solutions. First, if you encounter problems when Docker CE starts, you can view the container running log and the status of the container by executing the following command: ```systemctl status docker.service`
    Docker 1022 2023-04-10 14:44:02

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