build/first-boot.yaml

   1 ---
   2 heat_template_version: 2014-10-16
   3
   4 description: >
   5   This is an example showing how you can do firstboot configuration
   6   of the nodes via cloud-init.  To enable this, replace the default
   7   mapping of OS::TripleO::NodeUserData in ../overcloud_resource_registry*
   8
   9 parameters:
  10   ComputeKernelArgs:
  11     description: >
  12       Space seprated list of Kernel args to be update to grub.
  13       The given args will be appended to existing args of
  14       GRUB_CMDLINE_LINUX in file /etc/default/grub
  15       Example:
  16         "intel_iommu=on default_hugepagesz=2MB hugepagesz=2MB hugepages=2048"
  17     type: string
  18     default: ""
  19
  20 resources:
  21   userdata:
  22     type: OS::Heat::MultipartMime
  23     properties:
  24       parts:
  25         - config: {get_resource: compute_kernel_args}
  26
  27   # Verify the logs on /var/log/cloud-init.log on the overcloud node
  28   compute_kernel_args:
  29     type: OS::Heat::SoftwareConfig
  30     properties:
  31       config:
  32         str_replace:
  33           template: |
  34             #!/bin/bash
  35             set -x
  36             sed 's/^\(GRUB_CMDLINE_LINUX=".*\)"/\1 $KERNEL_ARGS"/g' \
  37                                           -i /etc/default/grub ;
  38             grub2-mkconfig -o /etc/grub2.cfg
  39             hugepage_count=$(echo $KERNEL_ARGS | \
  40                              grep -oP ' ?hugepages=\K[0-9]+')
  41             if [ -z "$hugepage_count" ]; then
  42               hugepage_count=1024
  43             fi
  44             echo vm.hugetlb_shm_group=0 >> /usr/lib/sysctl.d/00-system.conf
  45             HPAGE_CT=$(printf "%.0f" $(echo 2.2*$hugepage_count | bc))
  46             echo vm.max_map_count=$HPAGE_CT >> /usr/lib/sysctl.d/00-system.conf
  47             HPAGE_CT=$(($hugepage_count * 2 * 1024 * 1024))
  48             echo kernel.shmmax=$HPAGE_CT >> /usr/lib/sysctl.d/00-system.conf
  49
  50             reboot
  51           params:
  52             $KERNEL_ARGS: {get_param: ComputeKernelArgs}
  53
  54 outputs:
  55   OS::stack_id:
  56     value: {get_resource: userdata}