Add rudimentary network configuration support
[lxc-debian-unprivileged.git] / templates / lxc-debian-unprivileged
index 86739442b1178644cc61e86b5675be00c5475f68..9a3f248ffb95d411f65fe39a5cc6fad00c52cf15 100755 (executable)
@@ -31,9 +31,13 @@ done
 
 if [ "$MAPPED" == "no" ]; then
     echo "This template can only be used for unprivileged containers." 1>&2
-    echo "You might want the \"debian\" template instead." 1|&2
+    echo "You might want the \"debian\" template instead." 1>&2
+    exit 1
 fi
 
+set -e
+set -u
+
 # Make sure the usual locations are in PATH
 export PATH=/usr/sbin:/usr/bin:/sbin:/bin:$PATH
 export GREP_OPTIONS=""
@@ -50,11 +54,40 @@ Required arguments:
 
 Optional arguments:
 [ -m | --mirror <mirrorurl> ]: The debian mirror to user
+[ -n | --network <networkspec> ]: How to configure networking
+
+Network spec:
+  <type>[,options]
+
+  type is one of:
+    dhcp4: v4 dhcp will be enabled.
+    dhcp6: v6 dhcp will be enabled.
+    dhcp: v4 and v6 dhcp will be enabled.
+    static: no dhcp will be enabled
+
+  options:
+    this is a , seperated list, and sets up static assignments for v4 or v6,
+    regardless of type.
+    The order of arguments is
+      staticv4/staticnetmask
+      staticv6/staticv6netmask
+      gateway
+      v6gateway
+
+  examples:
+
+    --network dhcp4 (default)
+    --network dhcp6 (v6 dhcp)
+    --network dhcp  (v4 and v6 dhcp)
+    --network dhcp4,,2001:db8:1234:5678::1/64 (dhcp4 and static v6 address)
+    --network static,,2001:db8:1234:5678::5/64,,fe80::1 (static v6)
+    --network static,192.0.2.15/24,,192.0.2.1 (static v4)
+
 EOF
     return 0
 }
 
-options=$(getopt -o r:m:h -l release:,mirror:,help,mapped-uid:,mapped-gid:,name:,path:,rootfs: -- "$@")
+options=$(getopt -o r:m:n:h -l release:,mirror:,network:,help,mapped-uid:,mapped-gid:,name:,path:,rootfs: -- "$@")
 
 if [ $? -ne 0 ]; then
     usage
@@ -65,6 +98,7 @@ eval set -- "$options"
 
 DEBIAN_MIRROR="http://mirror.mythic-beasts.com/debian/"
 DEBIAN_RELEASE="jessie"
+NETWORK_CONFIG=""
 
 disable_initscripts() {
     cat <<EOF > "${LXC_ROOTFS}/usr/sbin/policy-rc.d"
@@ -86,6 +120,7 @@ while :; do
         -h|--help)      usage && exit 1;;
         -r|--release)   DEBIAN_RELEASE="$2"; shift 2;;
         -m|--mirror)    DEBIAN_MIRROR="$2"; shift 2;;
+        -n|--network)   NETWORK_CONFIG="$2"; shift 2;;
         --mapped-uid)   MAPPED_UID="$2"; shift 2;;
         --mapped-gid)   MAPPED_GID="$2"; shift 2;;
         --name)         LXC_NAME="$2"; shift 2;;
@@ -95,6 +130,136 @@ while :; do
     esac
 done
 
+INTERFACE_DEFAULTS="auto eth0
+iface eth0 inet dhcp"
+
+generate_network_config() {
+    if [ "$NETWORK_CONFIG" == "" ]; then
+        echo "$INTERFACE_DEFAULTS"
+        return 0
+    fi
+
+    echo "auto eth0"
+    # see if there's a type
+    network_type=${NETWORK_CONFIG/,*}
+    other_params=${NETWORK_CONFIG#*,}
+
+    v4_configured=no
+    v6_configured=no
+
+    if [ "$network_type" == "dhcp" ]; then
+        echo "iface eth0 inet dhcp"
+        echo "iface eth0 inet6 dhcp"
+        v4_configured=yes
+        v6_configured=yes
+    elif [ "$network_type" == "dhcp4" ]; then
+        echo "iface eth0 inet dhcp"
+        v4_configured=yes
+    elif [ "$network_type" == "dhcp6" ]; then
+        echo "iface eth0 inet6 dhcp"
+        v6_configured=yes
+    elif [ "$network_type" != "static" ]; then
+        echo "Unknown network type: $network_type" 1>&2
+        echo 1>&2
+        usage 1>&2
+        exit 1
+    fi
+
+    [ "$network_type" == "$other_params" ] && return 0
+
+    v4_static=${other_params/,*}
+    other_params=${other_params#*,}
+
+    if [ "$v4_static" != "" ]; then
+        if [ "$v4_configured" == "yes" ]; then
+            echo "Both v4 DHCP and Static - giving up." 1>&2
+            echo 1>&2
+            usage 1>&2
+            exit 1
+        fi
+    fi
+
+    if [ "$v4_static" == "$other_params" ]; then
+        if [ "$v4_static" != "" ]; then
+            echo "iface eth0 inet static"
+            echo "  address $v4_static"
+        fi
+    fi
+
+    v6_static=${other_params/,*}
+    other_params=${other_params#*,}
+
+    if [ "$v6_static" != "" ]; then
+        if [ "$v6_configured" == "yes" ]; then
+            echo "Both v6 DHCP and Static - giving up." 1>&2
+            echo 1>&2
+            usage 1>&2
+            exit 1
+        fi
+    fi
+
+    if [ "$v6_static" == "$other_params" ]; then
+        if [ "$v4_static" ]; then
+            echo "iface eth0 inet static"
+            echo "  address $v4_static"
+            echo
+        fi
+
+        echo "iface eth0 inet6 static"
+        echo "  address $v6_static"
+
+        return 0
+    fi
+
+    v4_gateway=${other_params/,*}
+    other_params=${other_params#*,}
+
+    if [ "$v4_gateway" == "$other_params" ]; then
+        if [ "$v4_static" != "" ]; then
+            echo "iface eth0 inet static"
+            echo "  address $v4_static"
+            [ "$v4_gateway" != "" ] && echo "  gateway $v4_gateway"
+
+            if [ "$v6_static" != "" ]; then
+                echo "iface eth0 inet6 static"
+                echo "  address $v6_static"
+            fi
+
+            return 0
+        fi
+
+        if [ "$v4_configured" == "yes" ]; then
+            echo "DHCP and static gateway not supported, giving up." 1>&2
+            echo 1>&2
+            usage 1>&2
+            exit 1
+        fi
+    fi
+
+    v6_gateway=${other_params/,*}
+
+    if [ "$v4_static" != "" ]; then
+        echo "iface eth0 inet static"
+        echo "  address $v4_static"
+        [ "$v4_gateway" != "" ] && echo "  gateway $v4_gateway"
+        echo
+    fi
+
+    if [ "$v6_static" != "" ]; then
+        echo "iface eth0 inet6 static"
+        echo "  address $v6_static"
+        [ "$v6_gateway" != "" ] && echo "  gateway $v6_gateway"
+    fi
+
+    return 0
+}
+
+INTERFACE_DETAILS="$(generate_network_config)"
+
+# temporarily do something stupid
+echo "$INTERFACE_DETAILS"
+exit 1
+
 # rewrite the default config file
 
 sed -i -e "/lxc./{w ${LXC_PATH}/config-auto" -e "d}" "${LXC_PATH}/config"
@@ -202,17 +367,22 @@ sed -i -e 's#^\(session.*required.*pam_loginuid.so\)#\#\1#;' "${LXC_ROOTFS}"/etc
 # set the hostname
 echo $LXC_NAME > "${LXC_ROOTFS}/etc/hostname"
 
+SECURITY=""
+if [ "$DEBIAN_RELEASE" != "sid" ] && [ "$DEBIAN_RELEASE" != "unstable" ]; then
+    SECURITY="deb http://security.debian.org/ $DEBIAN_RELEASE/updates main"
+fi
+
 # setup sources.list
 cat <<EOF > "${LXC_ROOTFS}/etc/apt/sources.list"
 deb $DEBIAN_MIRROR $DEBIAN_RELEASE main
-deb http://security.debian.org/ $DEBIAN_RELEASE/updates main
+$SECURITY
 EOF
 
-# disable bits of systemd that we hates
-chroot "${LXC_ROOTFS}" /usr/sbin/update-rc.d -f checkroot.sh disable > /dev/null 2>&1
-chroot "${LXC_ROOTFS}" /usr/sbin/update-rc.d -f umountfs disable > /dev/null 2>&1
-chroot "${LXC_ROOTFS}" /usr/sbin/update-rc.d -f hwclock.sh disable > /dev/null 2>&1
-chroot "${LXC_ROOTFS}" /usr/sbin/update-rc.d -f hwclockfirst.sh disable > /dev/null 2>&1
+# disable bits of systemd / initrd that break things
+chroot "${LXC_ROOTFS}" /usr/sbin/update-rc.d -f checkroot.sh disable > /dev/null 2>&1 || true
+chroot "${LXC_ROOTFS}" /usr/sbin/update-rc.d -f umountfs disable > /dev/null 2>&1 || true
+chroot "${LXC_ROOTFS}" /usr/sbin/update-rc.d -f hwclock.sh disable > /dev/null 2>&1 || true
+chroot "${LXC_ROOTFS}" /usr/sbin/update-rc.d -f hwclockfirst.sh disable > /dev/null 2>&1 || true
 
 if [ -e "${LXC_ROOTFS}/etc/systemd/system/" ]; then
     touch "${LXC_ROOTFS}/etc/systemd/system/systemd-setup-dgram-qlen.service"
@@ -223,10 +393,11 @@ if [ -e "${LXC_ROOTFS}/etc/systemd/system/" ]; then
     chroot "${LXC_ROOTFS}" ln -s /lib/systemd/system/halt.target /etc/systemd/system/sigpwr.target
 fi
 
-cat <<EOF >> "${LXC_ROOTFS}${NETWORK_FILE}"
-auto eth0
-iface eth0 inet dhcp
-EOF
+if [ -e "${LXC_ROOTFS}/lib/systemd/system/systemd-journald-audit.socket" ]; then
+    touch "${LXC_ROOTFS}/etc/systemd/system/systemd-journald-audit.socket"
+fi
+
+echo "$INTERFACE_DETAILS" >> "${LXC_ROOTFS}${NETWORK_FILE}"
 
 # and update to the latest security
 chroot "${LXC_ROOTFS}" apt-get update
@@ -251,4 +422,20 @@ enable_initscripts
 
 rm -r "${LXC_PATH}/bin"
 
+cat <<EOF
+
+You have successfully created a new debian container, ${LXC_NAME} running ${DEBIAN_RELEASE}.
+
+You should start the new container, and use:
+
+  lxc-attach -n ${LXC_NAME} -- su -
+
+To create a user account / set the root password.
+
+Note, by default, it's likely only to be the console that can login as root, so that'd be:
+
+  lxc-console -n ${LXC_NAME} -t 0
+
+EOF
+
 exit 0