If I remember correctly, the caching of this example worked before:
bitbucket-pipelines.yml
image: atlassian/default-image:4
pipelines:
custom:
test-build-docker-image:
- step:
name: Build Docker image
script:
- export DOCKER_BUILDKIT=0
- docker load -i docker-cache/* || echo "No cache"
- docker build .
- mkdir -p docker-cache && docker save $(docker images -aq) -o docker-cache/cache.tar
caches:
- my-docker-cache
services:
- docker
definitions:
services:
docker:
memory: 7168
caches:
my-docker-cache:
key:
files:
- Dockerfile
path: docker-cache
options:
size: 2x
Dockerfile
FROM busybox:1.36.1
RUN echo "first"
RUN echo "second"
RUN echo "third"
Run 1
+ docker load -i docker-cache/* || echo "No cache"
open docker-cache/*: no such file or directory
No cache
+ docker build .
Sending build context to Docker daemon 137.8MB
Step 1/4 : FROM busybox:1.36.1
1.36.1: Pulling from library/busybox
9ad63333ebc9: Pulling fs layer
9ad63333ebc9: Verifying Checksum
9ad63333ebc9: Pull complete
Digest: sha256:6d9ac9237a84afe1516540f40a0fafdc86859b2141954b4d643af7066d598b74
Status: Downloaded newer image for busybox:1.36.1
---> 3f57d9401f8d
Step 2/4 : RUN echo "first"
---> Running in 9f5db0912aa0
first
---> Removed intermediate container 9f5db0912aa0
---> aef0afc1d25e
Step 3/4 : RUN echo "second"
---> Running in 6673f56d9742
second
---> Removed intermediate container 6673f56d9742
---> efd280830d9e
Step 4/4 : RUN echo "third"
---> Running in cbb666b81938
third
---> Removed intermediate container cbb666b81938
---> 7d5f23f53603
Successfully built 7d5f23f53603
+ mkdir -p docker-cache && docker save $(docker images -aq) -o docker-cache/cache.tar
Build teardown
Assembling contents of new cache 'my-docker-cache'
Cache "my-docker-cache: docker-cache": Cache key 45d889b080d15a21c02bbb55a24c59ded2823339d2a3e51d237e8119a7a2fd79
Cache "my-docker-cache: docker-cache": Compressing
Cache "my-docker-cache: docker-cache": Compressed in 0 seconds
Cache "my-docker-cache: docker-cache": Uploading 2.1 MiB
Cache "my-docker-cache: docker-cache": Uploaded in 1 seconds
Searching for test report files in directories named [test-results, failsafe-reports, test-reports, TestResults, surefire-reports] down to a depth of 4
Finished scanning for test reports. Found 0 test report files.
Merged test suites, total number tests is 0, with 0 failures and 0 errors.
Run 2
Build Setup
...
Cache "my-docker-cache: docker-cache": Cache key 45d889b080d15a21c02bbb55a24c59ded2823339d2a3e51d237e8119a7a2fd79
Cache "my-docker-cache: docker-cache": Downloading
Cache "my-docker-cache: docker-cache": Downloaded 2.1 MiB in 0 seconds
Cache "my-docker-cache: docker-cache": Extracting
Cache "my-docker-cache: docker-cache": Extracted in 0 seconds
...
+ docker load -i docker-cache/* || echo "No cache"
Loaded image ID: sha256:7d5f23f53603a6c0cfc8f66a28a2abf0da920cd669c6bd60ed67f0c3a963c99d
Loaded image ID: sha256:aef0afc1d25edf254e23a06940b2ff43c022fc8e0cc7d010d95d938a9b10869f
Loaded image ID: sha256:efd280830d9e615ef6d0ec7353da56151e5a29c02f71c81e640144a986483cc3
Loaded image ID: sha256:3f57d9401f8d42f986df300f0c69192fc41da28ccc8d797829467780db3dd741
+ docker build .
Sending build context to Docker daemon 142.3MB
Step 1/4 : FROM busybox:1.36.1
1.36.1: Pulling from library/busybox
Digest: sha256:6d9ac9237a84afe1516540f40a0fafdc86859b2141954b4d643af7066d598b74
Status: Downloaded newer image for busybox:1.36.1
---> 3f57d9401f8d
Step 2/4 : RUN echo "first"
---> Running in 455f29e76cb0
first
---> Removed intermediate container 455f29e76cb0
---> 2e82ca3f66ee
Step 3/4 : RUN echo "second"
---> Running in 449de7072c2a
second
---> Removed intermediate container 449de7072c2a
---> 694a3cee4ae5
Step 4/4 : RUN echo "third"
---> Running in b21aa5672cb9
third
---> Removed intermediate container b21aa5672cb9
---> d9162b45ec07
Successfully built d9162b45ec07
Why are the layers in the second run not cached?
