Docker: How to preserve dir cache from one image to the next?

Question

Suppose I have 3 docker files, each being independently useful.

A.dockerfile
B.dockerfile
C.dockerfile
...
N.dockerfile

And I make them all in the same context:

docker build .. -f A.dockerfile
docker build .. -f B.dockerfile 
docker build .. -f C.dockerfile
...
docker build .. -f N.dockerfile

There is caching at the layer level, yes. But now I have leveraged that caching in a useful way, and suddenly I am back to a saw-tooth of performance: for each of the N dockerfiles, many of which may complete in approximately O(1), I must send the entire context .. (approx. 3 Gb in my case) to the docker daemon every time.

The result is a saw tooth performance, but all the chugging isn't really doing anything -- functionally, I am knitting together different cached layers and cherry picking files from the context... so the vast majority of processing is just byte churn.

---

Is there any way to continuate the docker context cache some how?

Answer 1

等待大神解答