DOCKER_BUILDKIT=1 docker build --squash should not squash the base image #38903
Description
Description
Steps to reproduce the issue:
DOCKER_BUILDKIT=1 docker build --iidfile /tmp/iid --squash . && docker save $(cat /tmp/iid) | tar t | grep layer.tar | wc -l
Describe the results you received:
1
Describe the results you expected:
2
Additional information you deem important (e.g. issue happens only occasionally):
Output of docker version:
Client:
Version: master-dockerproject-2019-03-18
API version: 1.40
Go version: go1.11.6
Git commit: 8c3a619d
Built: Mon Mar 18 23:39:36 2019
OS/Arch: linux/amd64
Experimental: true
Server:
Engine:
Version: master-dockerproject-2019-03-18
API version: 1.40 (minimum version 1.12)
Go version: go1.12.1
Git commit: 36d2c8b
Built: Mon Mar 18 23:46:08 2019
OS/Arch: linux/amd64
Experimental: true
containerd:
Version: v1.2.5
GitCommit: bb71b10fd8f58240ca47fbb579b9d1028eea7c84
runc:
Version: 1.0.0-rc6+dev
GitCommit: 8011af4a96d657f5ab1cff56273308dd1e13c9eb
docker-init:
Version: 0.18.0
GitCommit: fec3683
Output of docker info:
Client:
Debug Mode: false
Server:
Containers: 10
Running: 0
Paused: 0
Stopped: 10
Images: 53
Server Version: master-dockerproject-2019-03-18
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Native Overlay Diff: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local logentries splunk syslog
Swarm: inactive
Runtimes: runsc-kvm kata runc runnc runsc
Default Runtime: runc
Init Binary: docker-init
containerd version: bb71b10fd8f58240ca47fbb579b9d1028eea7c84
runc version: 8011af4a96d657f5ab1cff56273308dd1e13c9eb
init version: fec3683
Security Options:
apparmor
seccomp
Profile: default
Kernel Version: 4.15.0-46-generic
Operating System: Ubuntu 18.04.2 LTS
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 7.767GiB
Name: suda-ws01
ID: 59b7cdb8-1482-4653-a6ed-08d50b808573
Docker Root Dir: /var/lib/docker
Debug Mode: true
File Descriptors: 22
Goroutines: 43
System Time: 2019-03-19T20:03:22.250407091+09:00
EventsListeners: 0
Username: akihirosuda
Registry: https://index.docker.io/v1/
Labels:
Experimental: true
Insecure Registries:
127.0.0.0/8
Live Restore Enabled: false
WARNING: No swap limit support
Additional environment details (AWS, VirtualBox, physical, etc.):