docker runs without exiting

Docker is a very popular virtualization container technology. It not only provides powerful containerization support, but also allows developers to quickly deploy and manage applications.

However, in the process of using Docker, sometimes you encounter such a situation: after the container is started, it automatically exits for some reason. This is a big trouble for developers. Because during the development or testing process, it is very important for the container to be able to run for a long time. If the container cannot run for a long time, various problems may occur, such as development progress being delayed, testing being unable to be carried out, and code changes not being able to take effect, etc.

Now, let’s take a look at the solution for Docker to run without exiting.

1. Find the container log

If we want to find problems with the Docker container, we need to find the container's log to determine the container running error. We can use the following command to find container logs:

docker logs [container]

where [container] is the name or ID of the container. By looking at the container's logs, we can understand why the container failed to start.

2. Restart the container

If the cause of the container startup failure is temporary or there is a problem with the container image, we can try to restart the container. We can restart a container using the following command:

docker restart [container]

where [container] is the name or ID of the container. By restarting the container, we can eliminate system errors so that the container can run normally.

3. Adjust container memory limits and CPU usage

Sometimes, running some special applications will cause the container to exit. This is usually because the application requires more memory or processor resources. We can adjust the memory limit and CPU usage of the container through the following command:

docker run -it --memory [limit] --cpu-shares [shares] [image]

where [limit] is the maximum amount of memory allowed to be used by the container, [shares] is the number of CPU cores allowed to be used by the container, [image] is the image name of the container.

By increasing the container's memory limit and CPU usage, we can ensure that the container has enough resources to run the application.

4. Check container network settings

In some cases, a container may exit due to network configuration issues. To solve this problem, we can check the container’s network settings. First, we can use the following command to view the IP address of the container:

docker inspect -f '{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}' [container]

where [container] is the name or ID of the container. If the container does not have an IP address, it means there is a problem with the container's network settings, and the container's network needs to be reset.

We can use the following command to set the container's network:

docker run -it --net [network_name] [image]

where [network_name] is the name of the network, [image] is the container The image name. By setting the correct network name, we can ensure that the container can run properly.

5. Update Docker version

If the reason why the container fails to run is that the Docker version is too old or there are known problems, we can try to update the Docker version. We can update Docker using the following command:

sudo apt-get update
sudo apt-get upgrade docker-ce

Updating the Docker version may resolve known issues and improve the performance and stability of Docker.

In the process of using Docker, the persistence and stability of the container are very important. If a Docker container fails to run for a long period of time, it can cause various problems. When container running problems occur, we can solve the problem by finding container logs, restarting the container, adjusting container resources, checking container network settings, and updating the Docker version. By understanding and mastering the solution of Docker running without exiting, we can better manage and use Docker and improve development efficiency and program quality.

The above is the detailed content of docker runs without exiting. For more information, please follow other related articles on the PHP Chinese website!