images: Add ubuntu-toolbox image definitions for Ubuntu

These are the definitions of the ubuntu-toolbox images for Ubuntus
16.04, 18.04, 20.04, 22.04 and 22.10 that play well with Toolbx.  Such
as, password-less sudo, able to resolve its own hostname, SELinux is
masked off, etc..  At the moment, these are already published at
quay.io/toolbx-images/ubuntu-toolbox:22.04 and such.

https://github.com/containers/toolbox/pull/483
https://github.com/containers/toolbox/pull/1284

Signed-off-by: Ievgen Popovych <jmennius@gmail.com>

images/ubuntu/16.04/Containerfile

@@ -0,0 +1,37 @@
+FROM docker.io/library/ubuntu:16.04
+
+LABEL com.github.containers.toolbox="true" \
+      name="ubuntu-toolbox" \
+      version="16.04" \
+      usage="This image is meant to be used with the toolbox command" \
+      summary="Base image for creating Ubuntu toolbox containers" \
+      maintainer="Ievgen Popovych <jmennius@gmail.com>"
+
+# Remove apt configuration optimized for containers
+# Remove docker-gzip-indexes to help with "command-not-found"
+RUN rm /etc/apt/apt.conf.d/docker-gzip-indexes /etc/apt/apt.conf.d/docker-no-languages
+
+# Enable myhostname nss plugin for clean hostname resolution without patching
+# hosts (at least for sudo), add it right after 'files' entry. We expect that
+# this entry is not present yet. Do this early so that package postinst (which
+# adds it too late in the order) skips this step
+RUN sed -Ei 's/^(hosts:.*)(\<files\>)\s*(.*)/\1\2 myhostname \3/' /etc/nsswitch.conf
+
+# Install ubuntu-minimal & ubuntu-standard
+# Ask resolvconf maintainer script not to touch resolve.conf file
+# Install extra packages as well as libnss-myhostname
+COPY extra-packages /
+RUN apt-get update && \
+    echo "resolvconf resolvconf/linkify-resolvconf boolean false" | debconf-set-selections && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y \
+        ubuntu-minimal ubuntu-standard \
+        libnss-myhostname \
+        $(cat extra-packages | xargs) && \
+    rm -rd /var/lib/apt/lists/*
+RUN rm /extra-packages
+
+# Allow authentication with empty password, promptless
+RUN sed -i '/^auth.*pam_unix.so/s/nullok_secure/try_first_pass nullok/' /etc/pam.d/common-auth
+
+# Fix empty bind-mount to clear selinuxfs (see #337)
+RUN mkdir /usr/share/empty

images/ubuntu/16.04/extra-packages

@@ -0,0 +1,8 @@
+curl
+git
+gnupg2
+keyutils
+tree
+unzip
+zip
+zsh

images/ubuntu/18.04/Containerfile

@@ -0,0 +1,37 @@
+FROM docker.io/library/ubuntu:18.04
+
+LABEL com.github.containers.toolbox="true" \
+      name="ubuntu-toolbox" \
+      version="18.04" \
+      usage="This image is meant to be used with the toolbox command" \
+      summary="Base image for creating Ubuntu toolbox containers" \
+      maintainer="Ievgen Popovych <jmennius@gmail.com>"
+
+# Remove apt configuration optimized for containers
+# Remove docker-gzip-indexes to help with "command-not-found"
+RUN rm /etc/apt/apt.conf.d/docker-gzip-indexes /etc/apt/apt.conf.d/docker-no-languages
+
+# Enable myhostname nss plugin for clean hostname resolution without patching
+# hosts (at least for sudo), add it right after 'files' entry. We expect that
+# this entry is not present yet. Do this early so that package postinst (which
+# adds it too late in the order) skips this step
+RUN sed -Ei 's/^(hosts:.*)(\<files\>)\s*(.*)/\1\2 myhostname \3/' /etc/nsswitch.conf
+
+# Restore documentation but do not upgrade all packages
+# Install extra packages as well as libnss-myhostname
+COPY extra-packages /
+RUN sed -Ei '/apt-get (update|upgrade)/s/^/#/' /usr/local/sbin/unminimize && \
+    apt-get update && \
+    yes | /usr/local/sbin/unminimize && \
+    DEBIAN_FRONTEND=noninteractive apt-get -y install \
+        ubuntu-minimal ubuntu-standard \
+        libnss-myhostname \
+        $(cat extra-packages | xargs) && \
+    rm -rd /var/lib/apt/lists/*
+RUN rm /extra-packages
+
+# Allow authentication with empty password, promptless
+RUN sed -i '/^auth.*pam_unix.so/s/nullok_secure/try_first_pass nullok/' /etc/pam.d/common-auth
+
+# Fix empty bind-mount to clear selinuxfs (see #337)
+RUN mkdir /usr/share/empty

images/ubuntu/18.04/extra-packages

@@ -0,0 +1,8 @@
+curl
+git
+gnupg2
+keyutils
+tree
+unzip
+zip
+zsh

images/ubuntu/20.04/Containerfile

@@ -0,0 +1,41 @@
+FROM docker.io/library/ubuntu:20.04
+
+LABEL com.github.containers.toolbox="true" \
+      name="ubuntu-toolbox" \
+      version="20.04" \
+      usage="This image is meant to be used with the toolbox command" \
+      summary="Base image for creating Ubuntu toolbox containers" \
+      maintainer="Ievgen Popovych <jmennius@gmail.com>"
+
+# Remove apt configuration optimized for containers
+# Remove docker-gzip-indexes to help with "command-not-found"
+RUN rm /etc/apt/apt.conf.d/docker-gzip-indexes /etc/apt/apt.conf.d/docker-no-languages
+
+# Enable myhostname nss plugin for clean hostname resolution without patching
+# hosts (at least for sudo), add it right after 'files' entry. We expect that
+# this entry is not present yet. Do this early so that package postinst (which
+# adds it too late in the order) skips this step
+RUN sed -Ei 's/^(hosts:.*)(\<files\>)\s*(.*)/\1\2 myhostname \3/' /etc/nsswitch.conf
+
+# Restore documentation but do not upgrade all packages
+# Install ubuntu-minimal & ubuntu-standard
+# Install extra packages as well as libnss-myhostname
+COPY extra-packages /
+RUN sed -Ei '/apt-get (update|upgrade)/s/^/#/' /usr/local/sbin/unminimize && \
+    apt-get update && \
+    yes | /usr/local/sbin/unminimize && \
+    DEBIAN_FRONTEND=noninteractive apt-get -y install \
+        ubuntu-minimal ubuntu-standard \
+        libnss-myhostname \
+        $(cat extra-packages | xargs) && \
+    rm -rd /var/lib/apt/lists/*
+RUN rm /extra-packages
+
+# Allow authentication with empty password, promptless
+RUN sed -i '/^auth.*pam_unix.so/s/nullok_secure/try_first_pass nullok/' /etc/pam.d/common-auth
+
+# Fix empty bind-mount to clear selinuxfs (see #337)
+RUN mkdir /usr/share/empty
+
+# Add flatpak-spawn to /usr/bin
+RUN ln -s /usr/libexec/flatpak-xdg-utils/flatpak-spawn /usr/bin/

images/ubuntu/20.04/extra-packages

@@ -0,0 +1,9 @@
+curl
+flatpak-xdg-utils
+git
+gnupg2
+keyutils
+tree
+unzip
+zip
+zsh

images/ubuntu/22.04/Containerfile

@@ -0,0 +1,38 @@
+FROM docker.io/library/ubuntu:22.04
+
+LABEL com.github.containers.toolbox="true" \
+      name="ubuntu-toolbox" \
+      version="22.04" \
+      usage="This image is meant to be used with the toolbox command" \
+      summary="Base image for creating Ubuntu toolbox containers" \
+      maintainer="Ievgen Popovych <jmennius@gmail.com>"
+
+# Remove apt configuration optimized for containers
+# Remove docker-gzip-indexes to help with "command-not-found"
+RUN rm /etc/apt/apt.conf.d/docker-gzip-indexes /etc/apt/apt.conf.d/docker-no-languages
+
+# Enable myhostname nss plugin for clean hostname resolution without patching
+# hosts (at least for sudo), add it right after 'files' entry. We expect that
+# this entry is not present yet. Do this early so that package postinst (which
+# adds it too late in the order) skips this step
+RUN sed -Ei 's/^(hosts:.*)(\<files\>)\s*(.*)/\1\2 myhostname \3/' /etc/nsswitch.conf
+
+# Restore documentation but do not upgrade all packages
+# Install ubuntu-minimal & ubuntu-standard
+# Install extra packages as well as libnss-myhostname
+COPY extra-packages /
+RUN sed -Ei '/apt-get (update|upgrade)/s/^/#/' /usr/local/sbin/unminimize && \
+    apt-get update && \
+    yes | /usr/local/sbin/unminimize && \
+    DEBIAN_FRONTEND=noninteractive apt-get -y install \
+        ubuntu-minimal ubuntu-standard \
+        libnss-myhostname \
+        $(cat extra-packages | xargs) && \
+    rm -rd /var/lib/apt/lists/*
+RUN rm /extra-packages
+
+# Fix empty bind-mount to clear selinuxfs (see #337)
+RUN mkdir /usr/share/empty
+
+# Add flatpak-spawn to /usr/bin
+RUN ln -s /usr/libexec/flatpak-xdg-utils/flatpak-spawn /usr/bin/

images/ubuntu/22.04/extra-packages

@@ -0,0 +1,9 @@
+curl
+flatpak-xdg-utils
+git
+gnupg2
+keyutils
+tree
+unzip
+zip
+zsh

images/ubuntu/22.10/Containerfile

@@ -0,0 +1,38 @@
+FROM docker.io/library/ubuntu:22.10
+
+LABEL com.github.containers.toolbox="true" \
+      name="ubuntu-toolbox" \
+      version="22.10" \
+      usage="This image is meant to be used with the toolbox command" \
+      summary="Base image for creating Ubuntu toolbox containers" \
+      maintainer="Ievgen Popovych <jmennius@gmail.com>"
+
+# Remove apt configuration optimized for containers
+# Remove docker-gzip-indexes to help with "command-not-found"
+RUN rm /etc/apt/apt.conf.d/docker-gzip-indexes /etc/apt/apt.conf.d/docker-no-languages
+
+# Enable myhostname nss plugin for clean hostname resolution without patching
+# hosts (at least for sudo), add it right after 'files' entry. We expect that
+# this entry is not present yet. Do this early so that package postinst (which
+# adds it too late in the order) skips this step
+RUN sed -Ei 's/^(hosts:.*)(\<files\>)\s*(.*)/\1\2 myhostname \3/' /etc/nsswitch.conf
+
+# Restore documentation but do not upgrade all packages
+# Install ubuntu-minimal & ubuntu-standard
+# Install extra packages as well as libnss-myhostname
+COPY extra-packages /
+RUN sed -Ei '/apt-get (update|upgrade)/s/^/#/' /usr/local/sbin/unminimize && \
+    apt-get update && \
+    yes | /usr/local/sbin/unminimize && \
+    DEBIAN_FRONTEND=noninteractive apt-get -y install \
+        ubuntu-minimal ubuntu-standard \
+        libnss-myhostname \
+        $(cat extra-packages | xargs) && \
+    rm -rd /var/lib/apt/lists/*
+RUN rm /extra-packages
+
+# Fix empty bind-mount to clear selinuxfs (see #337)
+RUN mkdir /usr/share/empty
+
+# Add flatpak-spawn to /usr/bin
+RUN ln -s /usr/libexec/flatpak-xdg-utils/flatpak-spawn /usr/bin/

images/ubuntu/22.10/extra-packages

@@ -0,0 +1,9 @@
+curl
+flatpak-xdg-utils
+git
+gnupg2
+keyutils
+tree
+unzip
+zip
+zsh