Dockerfile, ARG and ENV not working - docker

Question

I have following Dockerfile
#Copyright (c) 2014-2017 Oracle and/or its affiliates. All rights reserved.
#
#Licensed under the Universal Permissive License v 1.0 as shown at http://oss.oracle.com/licenses/upl.
#
# ORACLE DOCKERFILES PROJECT
# --------------------------
# This Dockerfile extends the Oracle WebLogic image by creating a sample domain.
#
# Util scripts are copied into the image enabling users to plug NodeManager
# automatically into the AdminServer running on another container.
#
# HOW TO BUILD THIS IMAGE
# -----------------------
# Put all downloaded files in the same directory as this Dockerfile
# Run:
# $ sudo docker build -t 12213-domain
#
# Pull base image
# ---------------
FROM oracle/weblogic:12.2.1.3-developer
# Maintainer
# ----------
MAINTAINER Monica Riccelli <monica.riccelli#oracle.com>
ARG DOMAIN_NAME
ARG ADMIN_PORT
ARG ADMIN_NAME
ARG ADMIN_USERNAME
ARG ADMIN_PASSWORD
# WLS Configuration
# ---------------------------
ENV ADMIN_HOST="wlsadmin" \
NM_PORT="5556" \
MS_PORT="8001" \
DEBUG_PORT="8453" \
ORACLE_HOME=/u01/oracle \
SCRIPT_FILE=/u01/oracle/createAndStartWLSDomain.sh \
CONFIG_JVM_ARGS="-Dweblogic.security.SSL.ignoreHostnameVerification=true" \
PATH=$PATH:/u01/oracle/oracle_common/common/bin:/u01/oracle/wlserver/common/bin:/u01/oracle/user_projects/domains/${DOMAIN_NAME:-base_domain}/bin:/u01/oracle
# Domain and Server environment variables
# ------------------------------------------------------------
ENV DOMAIN_NAME="${DOMAIN_NAME}" \
PRE_DOMAIN_HOME=/u01/oracle/user_projects \
ADMIN_PORT="${ADMIN_PORT}" \
ADMIN_USERNAME="${ADMIN_USERNAME}" \
ADMIN_NAME="${ADMIN_NAME}" \
MS_NAME="${MS_NAME:-""}" \
NM_NAME="${NM_NAME:-""}" \
ADMIN_PASSWORD="${ADMIN_PASSWORD}" \
CLUSTER_NAME="${CLUSTER_NAME:-DockerCluster}" \
DEBUG_FLAG=true \
PRODUCTION_MODE=dev
# Add files required to build this image
COPY container-scripts/* /u01/oracle/
#Create directory where domain will be written to
USER root
RUN chmod +xw /u01/oracle/*.sh && \
chmod +xw /u01/oracle/*.py && \
mkdir -p $PRE_DOMAIN_HOME && \
chmod a+xr $PRE_DOMAIN_HOME && \
chown -R oracle:oracle $PRE_DOMAIN_HOME
VOLUME $PRE_DOMAIN_HOME
# Expose Node Manager default port, and also default for admin and managed server
EXPOSE $NM_PORT $ADMIN_PORT $MS_PORT $DEBUG_PORT
USER oracle
WORKDIR $ORACLE_HOME
# Define default command to start bash.
CMD ["/u01/oracle/createAndStartWLSDomain.sh"]
Which I build using command
#!/bin/sh
#
#Copyright (c) 2014-2017 Oracle and/or its affiliates. All rights reserved.
#
#Licensed under the Universal Permissive License v 1.0 as shown at http://oss.oracle.com/licenses/upl.
#
docker build -t 12213-domain \
--no-cache \
--build-arg DOMAIN_NAME=domain \
--build-arg ADMIN_PORT=7001 \
--build-arg ADMIN_NAME=admin \
--build-arg ADMIN_USERNAME=wlsuser \
--build-arg ADMIN_PASSWORD=wlsuser1 \
.
And get the following build log
$ ./build.sh
Sending build context to Docker daemon 51.71kB
Step 1/17 : FROM oracle/weblogic:12.2.1.3-developer
---> 15ba3f59a9f9
Step 2/17 : MAINTAINER Monica Riccelli <monica.riccelli#oracle.com>
---> Running in ac70adb36a4b
Removing intermediate container ac70adb36a4b
---> fe34e24ffce7
Step 3/17 : ARG DOMAIN_NAME
---> Running in 073a89d7613c
Removing intermediate container 073a89d7613c
---> de10930a27d6
Step 4/17 : ARG ADMIN_PORT
---> Running in d213833315c2
Removing intermediate container d213833315c2
---> 9af410c46028
Step 5/17 : ARG ADMIN_NAME
---> Running in 2baee277da54
Removing intermediate container 2baee277da54
---> a76f3f3d6642
Step 6/17 : ARG ADMIN_USERNNAME
---> Running in 9127852dae20
Removing intermediate container 9127852dae20
---> bb9af74b5804
Step 7/17 : ARG ADMIN_PASSWORD
---> Running in 4d0b1969605b
Removing intermediate container 4d0b1969605b
---> af18d5b6be2d
Step 8/17 : ENV ADMIN_HOST="wlsadmin" NM_PORT="5556" MS_PORT="8001"
DEBUG_PORT="8453" ORACLE_HOME=/u01/oracle SCRIPT_FILE=/u01/oracle/create
AndStartWLSDomain.sh CONFIG_JVM_ARGS="-Dweblogic.security.SSL.ignoreHostname
Verification=true" PATH=$PATH:/u01/oracle/oracle_common/common/bin:/u01/ora
cle/wlserver/common/bin:/u01/oracle/user_projects/domains/${DOMAIN_NAME:-base_do
main}/bin:/u01/oracle
---> Running in 449a28590d90
Removing intermediate container 449a28590d90
---> 2a1ddd961d5c
Step 9/17 : ENV DOMAIN_NAME="${DOMAIN_NAME}" PRE_DOMAIN_HOME=/u01/oracle/use
r_projects ADMIN_PORT="${ADMIN_PORT}" ADMIN_USERNAME="${ADMIN_USERNAME}
" ADMIN_NAME="${ADMIN_NAME}" MS_NAME="${MS_NAME:-""}" NM_NAME="${NM_
NAME:-""}" ADMIN_PASSWORD="${ADMIN_PASSWORD}" CLUSTER_NAME="${CLUSTER_NA
ME:-DockerCluster}" DEBUG_FLAG=true PRODUCTION_MODE=dev
---> Running in 0b01881a1ca4
Removing intermediate container 0b01881a1ca4
---> 7a3cd53ea5a3
Step 10/17 : COPY container-scripts/* /u01/oracle/
---> ce67247c3f7e
Step 11/17 : USER root
---> Running in 61adcafc1226
Removing intermediate container 61adcafc1226
---> f9a781fda963
Step 12/17 : RUN chmod +xw /u01/oracle/*.sh && chmod +xw /u01/oracle/*.py &&
mkdir -p $PRE_DOMAIN_HOME && chmod a+xr $PRE_DOMAIN_HOME && chown -
R oracle:oracle $PRE_DOMAIN_HOME
---> Running in 82b7b258d6f1
Removing intermediate container 82b7b258d6f1
---> 0cda254bc640
Step 13/17 : VOLUME $PRE_DOMAIN_HOME
---> Running in 6650ff8092d3
Removing intermediate container 6650ff8092d3
---> c469ff0ac9a2
Step 14/17 : EXPOSE $NM_PORT $ADMIN_PORT $MS_PORT $DEBUG_PORT
---> Running in a551b6bd5363
Removing intermediate container a551b6bd5363
---> 08253c4d94bd
Step 15/17 : USER oracle
---> Running in f1e6b4e482e9
Removing intermediate container f1e6b4e482e9
---> 85a75641e866
Step 16/17 : WORKDIR $ORACLE_HOME
Removing intermediate container a2b75ecbb0b6
---> 0124a8251ce3
Step 17/17 : CMD ["/u01/oracle/createAndStartWLSDomain.sh"]
---> Running in 1455fdc0d39d
Removing intermediate container 1455fdc0d39d
---> c1c947c2816c
[Warning] One or more build-args [ADMIN_USERNAME] were not consumed
Successfully built c1c947c2816c
Successfully tagged 12213-domain:latest
SECURITY WARNING: You are building a Docker image from Windows against a non-Win
dows Docker host. All files and directories added to build context will have '-r
wxr-xr-x' permissions. It is recommended to double check and reset permissions f
or sensitive files and directories.
Note the message
[Warning] One or more build-args [ADMIN_USERNAME] were not consumed
When I start the container and print the environment
FMW_PKG=fmw_12.2.1.3.0_wls_quick_Disk1_1of1.zip
CONFIG_JVM_ARGS=-Dweblogic.security.SSL.ignoreHostnameVerification=true
HOSTNAME=74adf82e8092
PRODUCTION_MODE=dev
TERM=xterm
ADMIN_NAME=AdminServer
CLUSTER_NAME=DockerCluster
FMW_JAR=fmw_12.2.1.3.0_wls_quick.jar
USER_MEM_ARGS=-Djava.security.egd=file:/dev/./urandom
DEBUG_FLAG=true
LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd
=40;33;01:or=40;31;01:mi=01;05;37;41:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;4
2:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.taz=01;31:
*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=0
1;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.Z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;
31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=0
1;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sa
r=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:
*.rz=01;31:*.cab=01;31:*.jpg=01;35:*.jpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01
;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;35:*.tif=01;35:*.ti
ff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;3
5:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.ogm=01;35:*.mp
4=01;35:*.m4v=01;35:*.mp4v=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:
*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01
;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=
01;35:*.axv=01;35:*.anx=01;35:*.ogv=01;35:*.ogx=01;35:*.aac=01;36:*.au=01;36:*.f
lac=01;36:*.mid=01;36:*.midi=01;36:*.mka=01;36:*.mp3=01;36:*.mpc=01;36:*.ogg=01;
36:*.ra=01;36:*.wav=01;36:*.axa=01;36:*.oga=01;36:*.spx=01;36:*.xspf=01;36:
MS_NAME=
DOMAIN_NAME=base_domain
SCRIPT_FILE=/u01/oracle/createAndStartWLSDomain.sh
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/java/defa
ult/bin:/u01/oracle/oracle_common/common/bin:/u01/oracle/wlserver/common/bin:/u0
1/oracle/oracle_common/common/bin:/u01/oracle/wlserver/common/bin:/u01/oracle/us
er_projects/domains/base_domain/bin:/u01/oracle
ADMIN_HOST=wlsadmin
DOMAIN_HOME=/u01/oracle/user_projects/domains/base_domain
NM_NAME=
PWD=/u01/oracle
DEBUG_PORT=8453
ADMIN_PORT=7001
JAVA_HOME=/usr/java/default
JAVA_PKG=server-jre-8u*-linux-x64.tar.gz
SHLVL=1
HOME=/u01/oracle
ADMIN_USERNAME=weblogic
NM_PORT=5556
PRE_DOMAIN_HOME=/u01/oracle/user_projects
ADMIN_PASSWORD=
ORACLE_HOME=/u01/oracle
MS_PORT=8001
_=/usr/bin/env
The environment variables are not set correctly, but uses the environment variables from the base image. I want to override those variables.
EDIT:
The problem is either --build-arg not passing the parameters to ARG, or ARG not correctly binding to ENV. Environment is overridden correctly, if I use constant string in the ENV. Even more interestingly, if I don't pass --build-arg to those ARG variables, I don't get any warning or error and still get the exactly same build log. AFAIK, unbound ARG without default value should raise an error.
Is this a bug? I'm using docker-toolbox on windows, and here is the docker version
docker-machine.exe version 0.14.0, build 89b8332
Docker version 18.03.0-ce, build 0520e24302

Answer 1

From docs.docker.com:
Environment variables defined using the ENV instruction always
override an ARG instruction of the same name
So the only way to resolve this is to use different name for ARG variables.
There is a typo in your ARG declaration.
I think change that to ADMIN_USERNAME will fix your problem.