How to check the reason why docker container stopped
Docker How to troubleshoot the error when the container service stops? During the use of the container, if the service cannot be used, you need to troubleshoot the errors in the container and repair the operation.
How to check the reason why the docker container stopped
1. Docker ps -a queries the starting container instance Status, first determine whether the container is started
2. Docker port Check the port. If it is a rest interface, you can manually simulate the parameter call. Do not test the RPC interface
3. Docker logs Check the business log , determine whether it is a business abnormality
4. Docker is generally a microservice. In this case, you can check the monitoring information of the microservice monitoring center
5. If there is a call chain similar to Zipkin, it is Even better, you can see the calling information of the business process.
For example, docker error troubleshooting: Unable to enter the container. You can enter the self-built centos7 base, but you cannot enter the mysql distributed by rancher.
#docker exec -it 3c1d bashrpc error: code = 2 desc = oci runtime error: exec failed: container_linux.go:247: starting container process caused "process_linux.go:110: decoding init error from pipe caused \" read parent: connection reset by peer\""
The reason for the error is that the new version 1.13.1-84 can be used normally after being reduced to 1.13.1-75.
For more related tutorials, please pay attention to the docker tutorial column on the PHP Chinese website.
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How to use Docker Desktop? Docker Desktop is a tool for running Docker containers on local machines. The steps to use include: 1. Install Docker Desktop; 2. Start Docker Desktop; 3. Create Docker image (using Dockerfile); 4. Build Docker image (using docker build); 5. Run Docker container (using docker run).

To get the Docker version, you can perform the following steps: Run the Docker command "docker --version" to view the client and server versions. For Mac or Windows, you can also view version information through the Version tab of the Docker Desktop GUI or the About Docker Desktop menu.

Steps to create a Docker image: Write a Dockerfile that contains the build instructions. Build the image in the terminal, using the docker build command. Tag the image and assign names and tags using the docker tag command.

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)

Methods for copying files to external hosts in Docker: Use the docker cp command: Execute docker cp [Options] <Container Path> <Host Path>. Using data volumes: Create a directory on the host, and use the -v parameter to mount the directory into the container when creating the container to achieve bidirectional file synchronization.

You can query the Docker container name by following the steps: List all containers (docker ps). Filter the container list (using the grep command). Gets the container name (located in the "NAMES" column).

You can switch to the domestic mirror source. The steps are as follows: 1. Edit the configuration file /etc/docker/daemon.json and add the mirror source address; 2. After saving and exiting, restart the Docker service sudo systemctl restart docker to improve the image download speed and stability.

To save the image in Docker, you can use the docker commit command to create a new image, containing the current state of the specified container, syntax: docker commit [Options] Container ID Image name. To save the image to the repository, you can use the docker push command, syntax: docker push image name [: tag]. To import saved images, you can use the docker pull command, syntax: docker pull image name [: tag].
