I am building an image with WordPress and own templates. Unfortunately this takes long time, at least 5 minutes most of the time.

• This is a bug report
• This is a feature request
• I searched existing issues before opening this one (found similar issue, which was closed, but the problem still persist with me)

     
Expected behavior:

I want to build an image with simple wordpress and theme installation (with nginx, mysql and so on).

Actual behavior:

I am building an image with WordPress and own templates. In order for everything to work correctly, I need to set chown www-data:www-data /var/www/html/ -R. Unfortunately this takes long time, at least 5 minutes most of the time.

Steps to reproduce the behavior:
 

Step 91/95 : WORKDIR /var/www/html/

 ---> Running in 3bbf283b7604

Removing intermediate container 3bbf283b7604

 ---> abe7aa3891b3

Step 92/95 : RUN chown www-data:www-data . -R

This is where this hangs for at least 5+ minutes.
 
Output of docker version:
 

Docker version 18.06.0-ce, build 0ffa825

Output of docker info:
 

Containers: 6

 Running: 6

 Paused: 0

 Stopped: 0

Images: 2246

Server Version: 18.06.0-ce

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 macvlan null overlay

 Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog

Swarm: inactive

Runtimes: runc

Default Runtime: runc

Init Binary: docker-init

containerd version: d64c661f1d51c48782c9cec8fda7604785f93587

runc version: 69663f0bd4b60df09991c08812a60108003fa340

init version: fec3683

Security Options:

 apparmor

 seccomp

  Profile: default

Kernel Version: 4.13.0-46-generic

Operating System: Ubuntu 17.10

OSType: linux

Architecture: x86_64

CPUs: 4

Total Memory: 7.688GiB

Name: katsarov-ThinkPad-T470s

ID: R5S6:67UI:QUZK:YBZS:VXLQ:YEFK:SEGU:7EAO:WTUZ:63R5:V3UX:NEJT

Docker Root Dir: /var/lib/docker

Debug Mode (client): false

Debug Mode (server): false

Registry: [url=https://index.docker.io/v1/]https://index.docker.io/v1/[/url]

Labels:

Experimental: false

Insecure Registries:

 127.0.0.0/8

Live Restore Enabled: false



WARNING: No swap limit support

 
Additional environment details (AWS, VirtualBox, physical, etc.)

None, running on a fresh ubuntu machine.