ROS Ubuntu Bionic: public key is not available

[josiahls]

Problem

I am running on Ubuntu 18.04, and my docker build crashes at:

# setup keys and sources for official Gazebo and ROS debian packages
RUN apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys D2486D2DD83DB69272AFE98867170598AF249743 \
 && echo "deb http://packages.osrfoundation.org/gazebo/ubuntu-stable bionic main" > /etc/apt/sources.list.d/gazebo-latest.list \
 && apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys 421C365BD9FF1F717815A3895523BAEEB01FA116 \
 && echo "deb http://packages.ros.org/ros/ubuntu bionic main" > /etc/apt/sources.list.d/ros-latest.list

I get the message:

Step 5/27 : RUN apt-get update && apt-get install -q -y     ariac3     bash-completion     gazebo9     libgazebo9-dev     locales     psmisc     python-rosdep     python-rosinstall     python-vcstools     ros-melodic-robot-state-publisher     ros-melodic-ros-controllers     ros-melodic-ros-core     ros-melodic-ros-base     wget     && apt-get clean     && rm -rf /var/lib/apt/lists/*
 ---> Running in 7a8256d8841c
Get:1 http://packages.ros.org/ros/ubuntu bionic InRelease [4669 B]
Get:2 http://packages.osrfoundation.org/gazebo/ubuntu-stable bionic InRelease [4253 B]
Get:3 http://security.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Err:1 http://packages.ros.org/ros/ubuntu bionic InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F42ED6FBAB17C654
Get:4 http://archive.ubuntu.com/ubuntu bionic InRelease [242 kB]
...
Reading package lists...
W: GPG error: http://packages.ros.org/ros/ubuntu bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY F42ED6FBAB17C654
E: The repository 'http://packages.ros.org/ros/ubuntu bionic InRelease' is not signed.

Solution
I fixed this via:

# setup keys and sources for official Gazebo and ROS debian packages
RUN apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys D2486D2DD83DB69272AFE98867170598AF249743 \
 && apt-key adv --keyserver keyserver.ubuntu.com --recv-keys F42ED6FBAB17C654 \
 && echo "deb http://packages.osrfoundation.org/gazebo/ubuntu-stable bionic main" > /etc/apt/sources.list.d/gazebo-latest.list \
 && apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys 421C365BD9FF1F717815A3895523BAEEB01FA116 \
 && echo "deb http://packages.ros.org/ros/ubuntu bionic main" > /etc/apt/sources.list.d/ros-latest.list

Let me know if doing a PR is a good idea. Not sure how many people had this issue, but my computer was pretty vanilla (1804, basic Docker version 19.03.5, build 633a0ea838).