Docker 多拱形图像每个拱形的图像 ID 是否相同？

Question

Do Docker multi-arch images have the same image ID (not Docker Content Digest? Image ID!) for each arch?

Answer 1

For images built from the same Dockerfile and base image but with different architectures, no.

For example with httpd:2.4.43-alpine , you can pull tags for different architecture:

# linux/amd64
docker pull httpd:2.4.43-alpine@sha256:fc11fbd1bc066776c608d2dddc6eafd1f6848ba709b452a6fa5d806fb13dd0f6

# linux/386
docker pull httpd:2.4.43-alpine@sha256:580d279181c20f105a9ef8bea9b1dac221d03f524b17d4a0b5bc7ea0c2be7a38

They do have a different ID:

docker image inspect httpd:2.4.43-alpine@sha256:fc11fbd1bc066776c608d2dddc6eafd1f6848ba709b452a6fa5d806fb13dd0f6 -f '{{ .Id }}'
# sha256:e7e8868c76974de9e867a76ccb25afd4415b313c2db3bdda7f92a789e3b5b6ae

docker image inspect httpd:2.4.43-alpine@sha256:580d279181c20f105a9ef8bea9b1dac221d03f524b17d4a0b5bc7ea0c2be7a38 -f '{{ .Id }}'
# sha256:a25ba4ab8022a688ef0c1d7d9c6c7e8cd15c769213bdef660a598fe46d07b889