dupport dhcp if linux distribution is Ubuntu.

create-lx-container.sh

@@ -300,6 +300,8 @@ echononl "\033[1mLinux Distribution [$DEFAULT_LXC_DIST]:\033[m "
 read LXC_DIST
 if [[ -z "$(trim $LXC_DIST)" ]] ; then
    LXC_DIST="$DEFAULT_LXC_DIST"
+else
+   LXC_DIST="${LXC_DIST,,}"
 fi
 
 echo ""
@@ -314,6 +316,8 @@ echononl "\033[1mCode name [${DEFAULT_CODENAME}]:\033[m "
 read LXC_RELEASE
 if [[ -z "$(trim $LXC_RELEASE)" ]] ; then
    LXC_RELEASE="$DEFAULT_CODENAME"
+else
+   LXC_RELEASE="${LXC_RELEASE,,}"
 fi
 
 #while [[ -z "$(trim $LXC_RELEASE)" ]]; do
@@ -347,11 +351,20 @@ echo ""
 echo -e "\033[32m--\033[m"
 echo ""
 
+NETWORK_CONFIGURATION_DHCP=false
 echo "   # Insert first IPv4 Address for the new LX Containers."
 echo "   #"
+if [[ "$LXC_DIST" = "ubuntu" ]] ; then
+   echo -e "   # Type \033[33mNone\033[m or \033[33mDHCP\033[m if no ipv4-address should be assigned"
+   echo "   #"
+fi
 echo ""
 echononl "\033[1mFirst IPv4 Address:\033[m "
 read IPV4_ADDRESS_1
+if [[ "$LXC_DIST" = "ubuntu" ]] && ([[ "${IPV4_ADDRESS_1,,}" = 'none' ]] \
+                                    || [[ "${IPV4_ADDRESS_1,,}" = 'dhcp' ]]) ; then
+   NETWORK_CONFIGURATION_DHCP=true
+else
 
    while ! $(is_valid_ipv4 $IPV4_ADDRESS_1); do
       if [[ -z "$(trim $IPV4_ADDRESS_1)" ]]; then
@@ -361,7 +374,20 @@ while ! $(is_valid_ipv4 $IPV4_ADDRESS_1); do
       fi
       echononl "\033[1mFirst IPv4 Address:\033[m "
       read IPV4_ADDRESS_1
+
+      if [[ "$LXC_DIST" = "ubuntu" ]] && ([[ "${IPV4_ADDRESS_1,,}" = 'none' ]] \
+                                          || [[ "${IPV4_ADDRESS_1,,}" = 'dhcp' ]]) ; then
+         NETWORK_CONFIGURATION_DHCP=true
+         break
+      fi
+
+
    done
+
+fi
+
+if ! $NETWORK_CONFIGURATION_DHCP ; then
+
    _octets=( ${IPV4_ADDRESS_1//\./ } )
    DEFAULT_IPV4_GATEWAY_1="${_octets[0]}.${_octets[1]}.${_octets[2]}.1"
    DEFAULT_IPV4_NAME_SERVER_1="${_octets[0]}.${_octets[1]}.${_octets[2]}.1"
@@ -607,6 +633,8 @@ if [[ -n "$IPV6_ADDRESS_1" ]] ; then
       done
    fi
 
+fi # if ! $NETWORK_CONFIGURATION_DHCP ; then
+
 
 echo ""
 echo -e "\033[32m--\033[m"
@@ -618,7 +646,7 @@ echo ""
 echononl "\033[1mFull qualified hostname:\033[m "
 read FQ_HOSTNAME
 
-while [[ -z "$(trim $IPV4_NETMASK_1)" ]]; do
+while [[ -z "$(trim $FQ_HOSTNAME)" ]]; do
    warn "Parameter is needed. Try again"
    echononl "\033[1mFull qualified hostname::\033[m "
    read FQ_HOSTNAME
@@ -649,6 +677,9 @@ echo "   Code name (or release number)............: $LXC_RELEASE"
 echo ""
 echo "   MAC Address (first) network device.......: $MAC_ADDRESS_1"
 echo ""
+if $NETWORK_CONFIGURATION_DHCP ; then
+   echo -e "   Network Configuration....................: \033[33mvia DHCP\033[m"
+else
    echo "   IPv4 Address (first).....................: $IPV4_ADDRESS_1"
    echo "   IPv4 Gateway Address (first).............: $IPV4_GATEWAY_1"
    echo "   Netmask first IPv4 Address...............: $IPV4_NETMASK_1"
@@ -668,6 +699,7 @@ if $_second_ipv4 ; then
       echo "   Netmask second IPv4 Address..............: $IPV4_NETMASK_2"
       echo "   CIDR (IPv4 Prefix) of netmask............: $IPV4_PREFIX_2"
    fi
+fi
 echo ""
 echo "   Hostname.................................: $HOSTNAME"
 echo "   Full qualified hostname..................: $FQ_HOSTNAME"
@@ -799,7 +831,7 @@ echo -en "\033[1G   \033[1;30m[ ... ]    \033[32m$msg\033[m"
 
 if [[ "$LXC_DIST" = "ubuntu" ]] ; then
    lxc-create -n $LXC_NAME -t download -P "$(dirname "$LXC_CONTAINER_DIR")" -- \
-      -d $LXC_DIST --release  $LXC_RELEASE --arch amd64 > /dev/null  2> $err_msg
+      --no-validate -d $LXC_DIST --release  $LXC_RELEASE --arch amd64 > /dev/null  2> $err_msg
 elif [[ "$LXC_DIST" = "debian" ]]; then
    lxc-create -n $LXC_NAME -t $LXC_DIST -P "$(dirname "$LXC_CONTAINER_DIR")" -- \
       --release $LXC_RELEASE --arch amd64 > /dev/null  2> $err_msg
@@ -1008,6 +1040,7 @@ lxc.network.flags = up
 lxc.network.link = br0
 lxc.network.name = eth0
 lxc.network.hwaddr = $MAC_ADDRESS_1
+
 # IPv4
 lxc.network.ipv4 = ${IPV4_ADDRESS_1}/$IPV4_PREFIX_1
 lxc.network.ipv4.gateway = ${IPV4_GATEWAY_1}
@@ -1059,7 +1092,7 @@ EOF
       fi
    else
 
-      cat << EOF > ${LXC_CONTAINER_DIR}/config 2> $err_msg
+      cat << EOF >> ${LXC_CONTAINER_DIR}/config 2> $err_msg
 lxc.rootfs.path = ${LXC_CONTAINER_DIR}/rootfs
 
 # Common configuration
@@ -1081,6 +1114,7 @@ lxc.net.0.flags = up
 lxc.net.0.link = br0
 lxc.net.0.name = eth0
 lxc.net.0.hwaddr = $MAC_ADDRESS_1
+
 # IPv4
 lxc.net.0.ipv4.address = ${IPV4_ADDRESS_1}/$IPV4_PREFIX_1
 lxc.net.0.ipv4.gateway = ${IPV4_GATEWAY_1}
@@ -1571,7 +1605,7 @@ EOF
       echo -e "\033[1G   [ \033[32m\033[1mok\033[m ]     ${msg_ok}${blank_signs}"
    fi
 
-else # if [[ "$LXC_DIST" = "debian" ]];
+elif [[ "$LXC_DIST" = "ubuntu" ]]; then
 
    msg="Backup file '${LXC_CONTAINER_DIR}/rootfs/etc/netplan/10-lxc.yaml"
    echo -en "\033[1G   \033[1;30m[ ... ]    \033[32m$msg\033[m"
@@ -1615,6 +1649,19 @@ else # if [[ "$LXC_DIST" = "debian" ]];
    echo -en "\033[1G   \033[1;30m[ \033[5m\033[1m...\033[m ]    \033[32m$msg\033[m"
 
    _failed=false
+
+   if $NETWORK_CONFIGURATION_DHCP ; then
+      cat << EOF > ${LXC_CONTAINER_DIR}/rootfs/etc/netplan/10-lxc.yaml
+network:
+  version: 2
+  ethernets:
+    eth0:
+      dhcp4: true
+      dhcp-identifier: mac
+EOF
+
+   else
+
       cat << EOF > ${LXC_CONTAINER_DIR}/rootfs/etc/netplan/10-lxc.yaml
 network:
   version: 2
@@ -1632,6 +1679,9 @@ network:
            - ${SEARCH_DOMAIN}
 
 EOF
+
+   fi # if $NETWORK_CONFIGURATION_DHCP
+
    if [[ $? -ne 0 ]]; then
       _failed=true
    fi