How docker generates core files

How does docker generate core files?

Steps to generate core files for application services in docker containers:

1. Set the core file generation format and output path

Execute on the physical machine The following command:

 echo "/data/cores/core.%p"  | sudo tee /proc/sys/kernel/core_pattern

2. The docker container is hung from the core file path to the corresponding path of the physical machine.

for example:
     docker run -it -d /tmp/core:/data/cores test:v1.0 /bin/bash

3. Execute in the containerulimit -c umlimited

4. Simulate the core file generated in the container

   kill -s SIGSEGV $$

After executing this command, a core file will be generated under the host /tmp/core

Related recommendations: docker tutorial

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