Issue 0029
- Summary
- problem building docker container - can't resolve debian servers
- Owner
- Tim
- Reporter
- Dhinakar
- Status
- closed
- Priority
- medium
Description [edit section]
dhinakar reported the problem in this msg> Step 11 : RUN DEBIAN_FRONTEND=noninteractive apt-get update && apt- > get -yV install apt-utils daemon gcc make python-paramiko python-lxml > python-simplejson python-matplotlib libtool xmlstarlet autoconf automake > rsync openjdk-7-jre openjdk-7-jdk iperf netperf netpipe-tcp texlive-latex- > base sshpass wget git diffstat sudo net-tools vim openssh-server curl inotify- > tools > ---> Running in e672ed2945a2 > Err http://ftp.us.debian.org jessie InRelease > > Err http://security.debian.org jessie/updates InRelease > > Err http://ftp.us.debian.org jessie Release.gpg > Could not resolve 'ftp.us.debian.org <http://ftp.us.debian.org> ' > Err http://security.debian.org jessie/updates Release.gpg > Could not resolve 'security.debian.org <http://security.debian.org> ' > Err http://deb.debian.org jessie InRelease > > Err http://deb.debian.org jessie-updates InRelease > > Err http://deb.debian.org jessie Release.gpg > Could not resolve 'deb.debian.org <http://deb.debian.org> ' > Err http://deb.debian.org jessie-updates Release.gpg > Could not resolve 'deb.debian.org <http://deb.debian.org> ' > Reading package lists...
Notes [edit section]
It turns out that Dhinakar was in a corporate setting, where his host machine had /etc/resolv.conf pointing to a nameserver 127.0.1.1 (which is usually a local dnsmasq server). Docker has problems in this case, and needs a real DNS server. We tried various things, including DOCKER_OPTS to specify a "--dns 8.8.8.8". Dhinakar reported that his corporate environment does not allow access to the 8.8.8.8 public nameserver.
A solution that finally worked was the following patch to his Dockerfile, but with the 8.8.8.8 server IP address replaced with a static IPV4 address that was provided to Dhinakar by his IT department.
diff --git a/Dockerfile b/Dockerfile index f9f2fb7..e54d391 100644 --- a/Dockerfile +++ b/Dockerfile @@ -20,6 +20,8 @@ ENV URL_PREFIX /fuego # ============================================================================== WORKDIR /fuego-install +COPY /etc/resolv.conf /etc/resolv.conf.save +RUN echo nameserver 8.8.8.8 > /etc/resolv.conf RUN dpkg --add-architecture i386 RUN echo deb http://ftp.us.debian.org/debian jessie main non-free >> /etc/apt/sources.list RUN if [ -n "$HTTP_PROXY" ]; then echo 'Acquire::http::proxy "'$HTTP_PROXY'";' > /etc/apt/apt.conf.d/80proxy; fi @@ -124,4 +126,5 @@ WORKDIR /home/jenkins COPY fuego-scripts / COPY fuego-scripts/fuego-start-cmd.sh /etc/ CMD /etc/fuego-start-cmd.sh +COPY /etc/resolv.conf.save /etc/resolv.conf
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