For some testing I’m doing I need a set of images of a specific size to simulate pulling larger vs smaller image.
Here is a quick script I put together for generating a 200mb, 600mb, 1000mb and 2000mb image (tiny bit larger as alpine included). Took a while to work out best to use /dev/urandom not /dev/zero as with zero the images got compressed for transfer.
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| #!/bin/bash | |
| set -e | |
| set -x | |
| # Push 200mb image | |
| dd if=/dev/urandom of=./file.bin bs=1M count=200 | |
| docker build -t lawrencegripper/big:200mb . | |
| docker push lawrencegripper/big:200mb | |
| rm ./file.bin | |
| # Push 600mb image | |
| dd if=/dev/urandom of=./file.bin bs=1M count=600 | |
| docker build -t lawrencegripper/big:600mb . | |
| docker push lawrencegripper/big:600mb | |
| rm ./file.bin | |
| # Push 1000mb image | |
| dd if=/dev/urandom of=./file.bin bs=1M count=1000 | |
| docker build -t lawrencegripper/big:1000mb . | |
| docker push lawrencegripper/big:1000mb | |
| rm ./file.bin | |
| # Push 2000mb image | |
| dd if=/dev/urandom of=./file.bin bs=1M count=2000 | |
| docker build -t lawrencegripper/big:2000mb . | |
| docker push lawrencegripper/big:2000mb | |
| rm ./file.bin |
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| FROM alpine | |
| COPY ./file.bin . |
GripDev 