Issue while building oracle18c-xe docker image.

[revsmadap]

Hi,

I'm trying to create a docker image for oracle 18c-xe. I'm following https://github.com/fuzziebrain/docker-oracle-xe

But I'm see following error.

docker build -t oracle-xe:18c .
Sending build context to Docker daemon 2.574GB
Step 1/10 : FROM oraclelinux:7-slim
---> 90e39322df71
Step 2/10 : ENV ORACLE_PASSWORD=Welcome1 EM_GLOBAL_ACCESS_YN=Y ORACLE_DOCKER_INSTALL=true ORACLE_SID=XE ORACLE_BASE=/opt/oracle ORACLE_HOME=/opt/oracle/product/18c/dbhomeXE ORAENV_ASK=NO RUN_FILE=runOracle.sh SHUTDOWN_FILE=shutdownDb.sh EM_REMOTE_ACCESS=enableEmRemoteAccess.sh EM_RESTORE=reconfigureEm.sh ORACLE_XE_RPM=oracle-database-xe-18c-1.0-1.x86_64.rpm CHECK_DB_FILE=checkDBStatus.sh
---> Using cache
---> 8e536a18a52e
Step 3/10 : COPY ./files/${ORACLE_XE_RPM} /tmp/
---> Using cache
---> e9b229f3b557
Step 4/10 : RUN yum install -y oracle-database-preinstall-18c && yum install -y /tmp/${ORACLE_XE_RPM} && rm -rf /tmp/${ORACLE_XE_RPM}
---> Running in 609f041d6956
Loaded plugins: ovl
https://yum.oracle.com/repo/OracleLinux/OL7/UEKR5/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: yum.oracle.com; Unknown error"
Trying other mirror.

One of the configured repositories failed (Latest Unbreakable Enterprise Kernel Release 5 for Oracle Linux 7Server (x86_64)),
and yum doesn't have enough cached data to continue. At this point the only
safe thing yum can do is fail. There are a few ways to work "fix" this:

 1. Contact the upstream for the repository and get them to fix the problem.

 2. Reconfigure the baseurl/etc. for the repository, to point to a working
    upstream. This is most often useful if you are using a newer
    distribution release than is supported by the repository (and the
    packages for the previous distribution release still work).

 3. Run the command with the repository temporarily disabled
        yum --disablerepo=ol7_UEKR5 ...

 4. Disable the repository permanently, so yum won't use it by default. Yum
    will then just ignore the repository until you permanently enable it
    again or use --enablerepo for temporary usage:

        yum-config-manager --disable ol7_UEKR5
    or
        subscription-manager repos --disable=ol7_UEKR5

 5. Configure the failing repository to be skipped, if it is unavailable.
    Note that yum will try to contact the repo. when it runs most commands,
    so will have to try and fail each time (and thus. yum will be be much
    slower). If it is a very temporary problem though, this is often a nice
    compromise:

        yum-config-manager --save --setopt=ol7_UEKR5.skip_if_unavailable=true

failure: repodata/repomd.xml from ol7_UEKR5: [Errno 256] No more mirrors to try.
https://yum.oracle.com/repo/OracleLinux/OL7/UEKR5/x86_64/repodata/repomd.xml: [Errno 14] curl#6 - "Could not resolve host: yum.oracle.com; Unknown error"
The command '/bin/sh -c yum install -y oracle-database-preinstall-18c && yum install -y /tmp/${ORACLE_XE_RPM} && rm -rf /tmp/${ORACLE_XE_RPM}' returned a non-zero code: 1

But I'm able to access https://yum.oracle.com/repo/OracleLinux/OL7/UEKR5/x86_64/repodata/repomd.xml using Curl & browser.

Any assistance to resolve this issue will be a great help.

I'm running this on a mac.

Docker Info:
Containers: 22
Running: 2
Paused: 0
Stopped: 20
Images: 45
Server Version: 18.06.1-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 ipvlan 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: 468a545b9edcd5932818eb9de8e72413e616e86e
runc version: 69663f0bd4b60df09991c08812a60108003fa340
init version: fec3683
Security Options:
seccomp
Profile: default
Kernel Version: 4.9.93-linuxkit-aufs
Operating System: Docker for Mac
OSType: linux
Architecture: x86_64
CPUs: 2
Total Memory: 5.818GiB
Name: linuxkit-025000000001
ID: KF6U:3OVX:72BJ:KUYC:MTOW:32TU:2T5X:66FK:Y3WY:GXX5:ASE6:33VR
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
HTTP Proxy: gateway.docker.internal:3128
HTTPS Proxy: gateway.docker.internal:3129
Registry: https://index.docker.io/v1/
Labels:
Experimental: true

[peterwalkley]

I hit this problem too on a new centos 8 and docker environment. The issue seems to be that the default docker bridge network does not have internet access. To fix it, I build using the command:

docker build --network host -t oracle-xe:18c .

As a simple test before building, do:

docker run --rm -it alpine ping -c4 yum.oracle.com

You will likely get an error saying bad address. Try again adding the network:

docker run --network host --rm -it alpine ping -c4 yum.oracle.com

and this this you should get a response. I'd googled around and found lots of hits relating to containers not getting internet access, but none of the solutions wanted to work for me.