Câu hỏi phỏng vấn Docker
Câu hỏi

What is the preferred way of removing containers - ‘docker rm -f’ or ‘docker stop’ then followed by a
‘docker rm’?

Câu trả lời

The preferred way of removing Docker containers is to first stop the container using the docker stop command and then remove it using the docker rm command. This approach is generally recommended over using docker rm -f for several reasons:

  1. Graceful Shutdown: The docker stop command sends a SIGTERM signal to the main process inside the container, allowing it to terminate gracefully. This ensures that the process has the opportunity to clean up resources and save any necessary state before shutting down. After a grace period (default is 10 seconds), if the container has not stopped, Docker sends a SIGKILL signal to forcefully terminate it[1][3][4].

  2. Data Integrity: Using docker stop helps in maintaining data integrity, especially if the container is performing critical operations or writing data to disk. A graceful shutdown reduces the risk of data corruption that might occur if the container is abruptly killed[3][4].

  3. Resource Management: Stopping the container first ensures that all resources (CPU, memory, etc.) allocated to the container are properly released. This is particularly important in environments with limited resources or when running multiple containers[4][6].

  4. Best Practices: The docker rm -f co...

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