What should I do if Alibaba Cloud service cannot be accessed after docker mapping?-Docker-php.cn

Home

Operation and Maintenance

Docker

What should I do if Alibaba Cloud service cannot be accessed after docker mapping?

PHPz

Apr 18, 2023 am 09:05 AM

As a leading cloud computing service provider, Alibaba Cloud's cloud hosting, container services, serverless, object storage and other services have been widely recognized by users. Among them, Docker container technology is also an indispensable cloud computing service. However, when using Alibaba Cloud's Docker service, some users may encounter an inaccessible problem. This article will describe the causes and solutions to this problem.

Problem description

In the process of using Alibaba Cloud Docker service, users may encounter the following situation: after mapping the Docker container port to the cloud host port, the cloud host public port cannot be used. You can use the network IP and port to access the service in the container, but you can use the container's IP and port inside the cloud host to access the service normally.

Cause Analysis

The reason for this problem is that Alibaba Cloud's security group does not allow any inbound access by default, and users need to manually enable inbound access to the port. Specifically, after the user maps the container port to the cloud host port, if the corresponding port inbound rule is not enabled in the Alibaba Cloud console, access to the public IP and port of the cloud host will be blocked and the container will not be accessible. services in.

Solution

In order to solve this problem, users need to manually enable the inbound access rules of the port in the Alibaba Cloud console. The specific steps are as follows:

Log in to the Alibaba Cloud console. Find the cloud server ECS in the left navigation bar and enter the cloud server instance list page.
In the instance list page, find the cloud host instance for which port rules need to be set. Click the "Security Group" button behind the instance. In the security group page that pops up, find the security group corresponding to the cloud host and click the "Configure Rules" button.
In the security group rules page, select "Inbound access" and then click the "Add security group rule" button.
In the pop-up Add Security Group Rules page, fill in the corresponding rule information. For example, if you need to open port 80 in the container, you need to fill in the following information:

Priority: Select a priority, usually fill in "1".
Rule direction: Select "In direction".
Authorization policy: Select "Allow".
Protocol type: Select "TCP".
Port range: Fill in the port numbers that need to be opened in the "Start Port" and "End Port", such as 80.
Authorization type: Select "CIDR".
Authorization object: Fill in the IP address segment that requires access to the port, such as 0.0.0.0/0.

After filling in the corresponding information, click the "OK" button to save the rule. After saving successfully, you can access the services in the container in the cloud host instance.

Summary

When using Alibaba Cloud's Docker service, if you are unable to access the services in the container, it is most likely because security group rules have not been set. For this reason, users need to manually set the inbound access rules for the corresponding ports in the Alibaba Cloud console to properly access the services in the container. I hope the methods and steps in this article can help users in need.

The above is the detailed content of What should I do if Alibaba Cloud service cannot be accessed after docker mapping?. For more information, please follow other related articles on the PHP Chinese website!

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Docker and Linux: The Perfect PartnershipApr 30, 2025 am 12:02 AM

Docker and Linux are perfect matches because they can simplify the development and deployment of applications. 1) Docker uses Linux's namespaces and cgroups to implement container isolation and resource management. 2) Docker containers are more efficient than virtual machines, have faster startup speeds, and the mirrored hierarchical structure is easy to build and distribute. 3) On Linux, the installation and use of Docker is very simple, with only a few commands. 4) Through DockerCompose, you can easily manage and deploy multi-container applications.

Docker vs. Kubernetes: Deciding Which to UseApr 29, 2025 am 12:05 AM

The difference between Docker and Kubernetes is that Docker is a containerized platform suitable for small projects and development environments; Kubernetes is a container orchestration system suitable for large projects and production environments. 1.Docker simplifies application deployment and is suitable for small projects with limited resources. 2. Kubernetes provides automation and scalability capabilities, suitable for large projects that require efficient management.

Docker and Kubernetes: Building Scalable ApplicationsApr 28, 2025 am 12:18 AM

Use Docker and Kubernetes to build scalable applications. 1) Create container images using Dockerfile, 2) Deployment and Service of Kubernetes through kubectl command, 3) Use HorizontalPodAutoscaler to achieve automatic scaling, thereby building an efficient and scalable application architecture.

Kubernetes and Docker: A Comparative AnalysisApr 27, 2025 am 12:05 AM

The main difference between Docker and Kubernetes is that Docker is used for containerization, while Kubernetes is used for container orchestration. 1.Docker provides a consistent environment to develop, test and deploy applications, and implement isolation and resource limitation through containers. 2. Kubernetes manages containerized applications, provides automated deployment, expansion and management functions, and supports load balancing and automatic scaling. The combination of the two can improve application deployment and management efficiency.

Running Docker on Linux: Installation and ConfigurationApr 26, 2025 am 12:12 AM

Installing and configuring Docker on Linux requires ensuring that the system is 64-bit and kernel version 3.10 and above, use the command "sudoapt-getupdate" and install it with the command "sudoapt-getupdate" and verify it with "sudoapt-getupdate" and. Docker uses the namespace and control groups of the Linux kernel to achieve container isolation and resource limitation. The image is a read-only template, and the container can be modified. Examples of usage include running an Nginx server and creating images with custom Dockerfiles. common

Why Use Docker? Benefits and Advantages ExplainedApr 25, 2025 am 12:05 AM

The reason for using Docker is that it provides an efficient, portable and consistent environment to package, distribute, and run applications. 1) Docker is a containerized platform that allows developers to package applications and their dependencies into lightweight, portable containers. 2) It is based on Linux container technology and joint file system to ensure fast startup and efficient operation. 3) Docker supports multi-stage construction, optimizes image size and deployment speed. 4) Using Docker can simplify development and deployment processes, improve efficiency and ensure consistency across environments.

Docker in Action: Real-World Examples and Use CasesApr 24, 2025 am 12:10 AM

Docker's application scenarios in actual projects include simplifying deployment, managing multi-container applications and performance optimization. 1.Docker simplifies application deployment, such as using Dockerfile to deploy Node.js applications. 2. DockerCompose manages multi-container applications, such as web and database services in microservice architecture. 3. Performance optimization uses multi-stage construction to reduce the image size and monitor the container status through health checks.

Docker vs. Kubernetes: Use Cases and ScenariosApr 23, 2025 am 12:11 AM

Select Docker in a small project or development environment, and Kubernetes in a large project or production environment. 1.Docker is suitable for rapid iteration and testing, 2. Kubernetes provides powerful container orchestration capabilities, suitable for managing and expanding large applications.

See all articles