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Docker images keep memory state?

Very new to dockers, apologies for the trivial question. I am currently using a virtual machine and creating live snapshots (which, of course, preserve the state of memory, etc.), so when will I be back at that moment. Do Docker snapshots work the same way? If I remove it with the application running, will it recover in the same state?

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2 answers

Not. It saves “layers”, which are essentially overlays in the file system, with different magic for environment variables, ports, etc. The memory status is not saved.

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The CRIU project is working on a technology that will simplify the breakpoint and transfer containers, including snapshots of RAM.

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Source: https://habr.com/ru/post/1203966/

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