No address associated with hostname inside docker container

Question

I am using a customized version of Ubuntu18.04 and I have a docker container where I tried to install a .deb package for the usage of a FLIR camera. To do so I downloaded from this website the file spinnaker-2.5.0.80-Ubuntu18.04-arm64-pkg.tar.gz, as suggested for Ubuntu18.04.

I followed those instructions to install everything, which basically means the following commands:

apt-get install libusb-1.0-0
tar xvfz spinnaker-2.5.0.80-Ubuntu18.04-arm64-pkg.tar.gz
cd spinnaker-2.5.0.80-arm64
./install_spinnaker_arm.sh

During this process the first errors arose, which I could fix through the installation of iputils-ping and lsb-release inside the docker container:

apt install iputils-ping
apt install -y lsb-release

However, afterwards another error arose:

/var/lib/dpkg/tmp.ci/preinst: 28 /var/lib/dpkg/tmp.ci/preinst: errmsg: not found
dpkg: error processing archive libspinnaker_2.5.0.80_arm64.deb (--install):
new libspinnaker package pre-installation script subprocess returned error exit status 127
ping: zone2.flir.net: No address associated with hostname

Errors were encountered while processing:
  libspinnaker_2.5.0.80_arm64.deb

I though it is a nework issue inside the container but I do have internet connection, which I checked through:

ping www.google.com

Does anybody has a suggestion why I am not able to install the spinnaker SDK inside my docker container? Or has an explanation for me, what "no address associated with hostname" means? I am thankfull for every hint in any direction. Maybe it is an issue because I moved my docker data folder to an external SD card?

Answer 1

I ran into this same issue today. The issue is not the ping, but instead the fact that the installer could not print the license for approval. At line 28 of preinst the script tries to print an error using errmsg but that command does not exist, resulting in this error at the beginning of your snippet:

/var/lib/dpkg/tmp.ci/preinst: 28 /var/lib/dpkg/tmp.ci/preinst: errmsg: not found

Looking at the preinst script (I unpacked the .deb using Archive Manager), we see the true problem is that it can't display the license:

I was able to successfully install during a docker build by doing the following:

1. Make sure you have NOT set DEBIAN_FRONTEND=noninteractive in your environment (this triggers the failure to load the license)
2. Run the dpkg/apt-get install steps explicitly in your dockerfile (don't use install_spinnaker.sh, as it has several places where it asks for input). When you install libspinnaker_*.deb, do so like this: (echo "yes" && cat) | dpkg -i libspinnaker_*.deb and it will accept the license for you. Note that you may have to re-implement all the configuration steps (udev modifications, etc) found in install_spinnaker.sh. (I have a GigE camera, so I don't have to worry about USB.)