[Summary] Several common Docker containers
Docker is a popular container technology that makes it easy to manage applications and their dependencies. Because of Docker's portability and flexibility, more and more businesses and developers are starting to use it to build and manage applications.
In Docker, containers are lightweight and independent execution environments that contain applications and their dependencies. Using Docker containers, you can package applications into portable, replicable units and run them in different environments, realizing the benefits of simplified deployment and management.
In this article, we will introduce several common Docker containers, which can be used in different applications and scenarios.
- Nginx container
Nginx is a high-performance web server and reverse proxy server. It is widely used in areas such as web applications, application servers, and load balancers. In Docker, you can use Nginx containers to quickly deploy web applications and implement functions such as load balancing and reverse proxy.
- MySQL Container
MySQL is a commonly used open source database management system that provides high availability and flexibility. In Docker, you can use MySQL containers to manage databases for rapid deployment and data management. Using MySQL containers, functions such as data separation, backup and recovery can be easily achieved.
- Redis container
Redis is a fast key-value storage database that helps implement functions such as caching and message queues. In Docker, you can use Redis containers to quickly deploy Redis instances and provide reliable caching and message queue services to applications.
- Jenkins container
Jenkins is a popular open source continuous integration and continuous delivery tool that helps development teams quickly deploy and test applications. In Docker, you can use Jenkins containers to quickly create CI/CD processes to quickly deploy applications and implement automated testing, deployment and other functions.
Summary:
Docker container is a flexible and portable application execution environment that can greatly simplify application deployment and management. In this article, several common Docker containers are introduced, which can be used in different applications and scenarios. Whether you are a developer or a system administrator, you can use these containers to quickly deploy, manage, and test applications.
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Docker is a must-have skill for DevOps engineers. 1.Docker is an open source containerized platform that achieves isolation and portability by packaging applications and their dependencies into containers. 2. Docker works with namespaces, control groups and federated file systems. 3. Basic usage includes creating, running and managing containers. 4. Advanced usage includes using DockerCompose to manage multi-container applications. 5. Common errors include container failure, port mapping problems, and data persistence problems. Debugging skills include viewing logs, entering containers, and viewing detailed information. 6. Performance optimization and best practices include image optimization, resource constraints, network optimization and best practices for using Dockerfile.

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Four ways to exit Docker container: Use Ctrl D in the container terminal Enter exit command in the container terminal Use docker stop <container_name> Command Use docker kill <container_name> command in the host terminal (force exit)

The steps to update a Docker image are as follows: Pull the latest image tag New image Delete the old image for a specific tag (optional) Restart the container (if needed)

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