feat: Docker firewheel ssh (#112)

This PR removes the overwrite of `ssh` and `scp` inside the docker
container, and does the necessary configuration to allow the `firewheel
ssh` and `firewheel scp` commands to work when running FIREWHEEL in
docker

---------

Co-authored-by: Mitch Negus <[email protected]>

Author: gregjacobus

docker/firewheel.dockerfile

@@ -18,7 +18,7 @@ RUN export DEBIAN_FRONTEND=noninteractive && \
                         ethtool libpcap-dev openvswitch-switch qemu-kvm qemu-utils \
                         dnsmasq ntfs-3g iproute2 qemu-system-x86 software-properties-common \
                         dosfstools openssh-server locales locales-all python3.10 python3.10-venv \
-                        vim psmisc && \
+                        vim psmisc iputils-ping && \
     apt-get clean && rm -rf /var/lib/apt/lists/* || { echo "Package installation failed"; exit 1; }
 
 ### Locale support ###
@@ -82,15 +82,11 @@ RUN bash -c "source /fwpy/bin/activate  && \
 
 RUN firewheel repository install -s -i || { echo "Repository installation failed"; exit 1; }
 
-RUN cp /usr/bin/ssh /usr/bin/ssh-old && \
-    cp /usr/bin/scp /usr/bin/scp-old && \
-    cp /usr/bin/sudo /usr/bin/sudo-old && \
+RUN cp /usr/bin/sudo /usr/bin/sudo-old && \
     cp /usr/bin/chgrp /usr/bin/chgrp-old
 
 COPY docker/fsroot/ /
 RUN chmod +x /usr/local/bin/entry && \
-    chmod +x /usr/bin/ssh && \
-    chmod +x /usr/bin/scp && \
     chmod +x /usr/bin/sudo && \
     chmod +x /usr/bin/chgrp && \
     chmod +x /start-minimega.sh

docker/fsroot/usr/bin/scp

@@ -7,6 +7,27 @@ function gr() {
     echo -e "\033[32;1m" "$@" "\033[m"
 }
 
+function yl() {
+    echo -e "\033[33;1m" "$@" "\033[m"
+}
+
+# Let the SSH server run without systemd
+mkdir /var/run/sshd
+
+# Start the SSH server
+/usr/sbin/sshd
+ssh-keygen -f ~/.ssh/id_rsa -N "" &>/dev/null
+cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
+if [ -e ~/.ssh/config ];
+then
+    yl "SSH config already existed, not modifying it";
+else
+    cat << EOF > ~/.ssh/config
+Host *
+    StrictHostKeyChecking no
+EOF
+fi
+
 export HOME=/root
 
 HN="$(hostname)"
@@ -75,4 +96,4 @@ until rm -rf /tmp/*; do
 done
 gr "done"
 
-gr "Container shutdown."
+gr "Container shutdown."