added create-boot-iso

1 files changed, 273 insertions, 0 deletions

diff --git a/create-boot-iso b/create-boot-iso
new file mode 100755
index 0000000..f1ec4cf
--- /dev/null
+++ b/create-boot-iso
@@ -0,0 +1,273 @@
+#!/bin/bash
+#
+# proof of concept script to create a bootable 'deployment' ISO
+#
+# This one can run on 'linux', to generate an ISO to bootstrap a kickstart
+# install.
+
+Self=$(basename $0)
+
+function print_usage {
+  echo "usage: $Self <options>"
+}
+
+function print_help {
+cat <<EOF
+$Self <options>
+
+Script to create a bootable 'install' ISO image.
+
+The image uses ipxe to retrieve a kernel to boot, and sets URLs for the
+'install' initrd and kickstart config the kernel should use.
+
+The whole thing is pretty CentOS 7 -centric at this point.
+
+Options given to this script will set values for the bootstrapping of the 
+*install* stage only. All values may subsequently be overridden from the 
+kickstart stage, once that is retrieved and control is handed over to it.
+
+Options:
+  -D, --domain		domain, to complete FQDN
+  -G, --gateway 	Gateway of target system
+  -H, --host		hostname of the target system
+  -I, --ip		IP address of target system
+  -K, --kserver		Kickstart server
+  -M, --netmask		Netmask of target system
+  -N, --nameserver	Nameserver of target system
+  -S, --cosmos-hash	Hash used by cosmos to verify stuff
+  -h, --help		this
+
+If --cosmos-hash is set to 'disabled', the kickstart stage should skip cosmos
+bootstrapping, and leave the system unmanaged.
+
+If -N, -K, -S options are not given, default values are provided.
+
+The script needs ipxe and 'mkisofs' to run, and 'sudo' to copy things onto the
+floppy image
+
+EOF
+}
+
+function parse_commadline {
+  while [ "$#" -gt 0 ] ; do
+    case "$1" in
+    -h|--help)
+      print_help
+      exit 0
+      ;;
+    -H|--host)
+      Host="$2"
+      shift
+      ;;
+    -D|--domain)
+      Domain="$2"
+      shift
+      ;;
+    -I|--ip)
+      IP="$2"
+      shift
+      ;;
+    -M|--netmask)
+      NM="$2"
+      shift
+      ;;
+    -G|--gateway)
+      GW="$2"
+      shift
+      ;;
+    -N|--nameserver)
+      NS="$2"
+      shift
+      ;;
+    -K|--kserver)
+      Kserver="$2"
+      shift
+      ;;
+    -P|--publish-path)
+      PublishPath="$2"
+      shift
+      ;;
+    -S|--cosmos-hash)
+      CosmosHash="$2"
+      shift
+      ;;
+    -T|--tmp-dir)
+      TmpDir="${2}"
+      shift
+      ;;
+    *)
+      echo "what do you mean \"$1\"?"
+      exit 1
+      ;;
+    esac
+    shift
+  done
+}
+
+function check_options {
+  if [ "x${Host}" = "x" ]
+  then
+    echo "${Self}: --host is mandatory"
+    print_usage
+    exit 1
+  fi
+  if [ "x${Domain}" = "x" ]
+  then
+    echo "${Self}: --domain is mandatory"
+    print_usage
+    exit 1
+  fi
+  if [ "x${IP}" = "x" ]
+  then
+    echo "${Self}: --ip is mandatory"
+    print_usage
+    exit 1
+  fi
+  if [ "x${NM}" = "x" ]
+  then
+    echo "${Self}: --netmask is mandatory"
+    print_usage
+    exit 1
+  fi
+  if [ "x${GW}" = "x" ]
+  then
+    echo "${Self}: --gateway is mandatory"
+    print_usage
+    exit 1
+  fi
+  if [ "x${NS}" = "x" ]
+  then
+    NS="109.105.96.141"
+  fi
+  if [ "x${Kserver}" = "x" ]
+  then
+    Kserver="109.105.122.84"
+  fi
+  if [ "x${CosmosHash}" = "x" ]
+  then
+    CosmosHash="2f15e1edb02f14607084f167929bc145ed47954d"
+  fi
+  if [ "x${TmpDir}" = "x" ]
+    then
+    TmpDir=$(mktemp -d)
+  else
+    mkdir -p "${TmpDir}"
+  fi
+}
+
+# Host="kas-fiona-10-02"
+# Domain="nordu.net"
+# IP="109.105.122.135"
+# NM="255.255.255.192"
+# GW="109.105.122.129"
+# NS="109.105.96.141"
+# Kserver="109.105.122.84"
+# CosmosHash="2f15e1edb02f14607084f167929bc145ed47954d"
+
+parse_commadline $@
+check_options
+
+####
+# In a bid to be clever, we're adding the 'cosmos hash' to the install
+# kernel cmdline. This is the one place that cannot be forged, changed, get
+# lost or 'go missing' from the initial invocation here, until the
+# anaconda/kickstart process takes over...
+
+WorkDir="${TmpDir}/${Host}.d"
+IsoRoot="${WorkDir}/isoroot"
+mkdir -p "${IsoRoot}/isolinux"
+mkdir -p "${IsoRoot}/kernel"
+mkdir -p "${IsoRoot}/images"
+
+
+cat >${IsoRoot}/isolinux/isolinux.cfg <<EOF
+default ipxelabel
+label ipxelabel
+  kernel ipxe.lkrn
+  append initrd=${Host}.ipxe
+EOF
+
+# This is 'inherited' from the floppy script, where redirection of output from
+# the here-doc into a file needs root privs:
+# We want to use variables in the rendered *.ipxe
+# We want to populate the variables in the *.ipxe with variables from this
+# script. This leads to the 'sudo sh -c "cat ..."' construct, which works well
+# ...except:
+# Quoting and escapes get complicated as a consequence.
+# In this script we don't need 'sudo' but the rest is unchanged:
+
+sh -c "cat >${IsoRoot}/isolinux/${Host}.ipxe <<EOF
+#!ipxe
+echo ${Host}
+ifopen net0
+###
+# Set some variables:
+set ip ${IP}
+set nm ${NM}
+set gw ${GW}
+set ns ${NS}
+set hn ${Host}
+set dn ${Domain}
+set ks ${Kserver}
+
+###
+# Set up network:
+set net0/ip \\$"{"ip"}"
+set net0/netmask \\$"{"nm"}"
+set net0/gateway \\$"{"gw"}"
+set dns \\$"{"ns"}"
+set hostname \\$"{"hn"}"
+set domain \\$"{"dn"}"
+###
+# Print some things on screen
+echo \"Configured IP Details:\"
+show net0/ip
+show net0/netmask
+show net0/gateway
+show dns
+show hostname
+show domain
+route
+###
+# Set install parameters:
+set base http://\\$"{"ks"}"/install/centos/7/os/x86_64
+kernel \\$"{"base"}"/images/pxeboot/vmlinuz text console=tty1 console=ttyS1,115200n8 ip=\\$"{"ip"}" netmask=\\$"{"nm"}" gateway=\\$"{"gw"}" repo=\\$"{"base"}" ks=http://\\$"{"ks"}"/install/ks/\\$"{"hn"}".ks cosmoshash=${CosmosHash}
+initrd \\$"{"base"}"/images/pxeboot/initrd.img
+###
+# Boot into install
+boot
+####
+# We really never should be here, but if we are, start a shell
+echo \"why are we here?\"
+shell
+EOF
+"
+
+if [ -r /etc/redhat-release ]
+then
+  cp -a /usr/share/ipxe/ipxe.iso "${IsoRoot}/isolinux/"
+  echo "I need isolinux.bin and ldlinux.c32 too. Please update the script"
+elif [ -r /etc/debian_version ]
+then
+  cp -a /boot/ipxe.lkrn "${IsoRoot}/isolinux/"
+  cp -a "/usr/lib/ISOLINUX/isolinux.bin" "${IsoRoot}/isolinux/"
+  cp -a "/usr/lib/syslinux/modules/bios/ldlinux.c32" "${IsoRoot}/isolinux/"
+else
+  echo "neither redhat nor debian, I'm outta here..."
+  exit 1
+fi
+mkisofs -o "${WorkDir}/${Host}.iso" -b isolinux/isolinux.bin \
+  -c isolinux/boot.cat --no-emul-boot --boot-load-size 4 \
+  --boot-info-table -V "${Host}" -r -R -J -v -T "${IsoRoot}" 
+
+isohybrid "${WorkDir}/${Host}.iso"
+
+if [ ! "x${PublishPath}" = "x" ]
+then
+  mkdir -p "${PublishPath}/${Host}.d/"
+  mv "${WorkDir}/${Host}.img" "${PublishPath}/${Host}.d/"
+  rm -rf ${WorkDir}
+else
+  echo "no PublishPath set, leaving everything in ${WorkDir}"
+fi
+