Ansible playbook for Meltdown mitigation (KPI for CentOS/RHEL 7)

mitigate-meltdown.yml

---
- hosts: all
  gather_facts: false
  pre_tasks:
    - name: ensure ipmi tools are installed
      yum:
        name: ipmitool
    - name: retrieve ipmitool address
      shell: >
        ipmitool lan print | grep '^IP Addr' | grep -v Source | cut -d':' -f2 | xargs
      register: ipmitool_lan_print
      changed_when: false
      failed_when: ipmitool_lan_print.stdout == ""
    - name: print ipmi address
      debug:
        msg: "{{ ipmitool_lan_print.stdout }}"
    - name: ensure ipmi is accessible
      delegate_to: localhost
      wait_for:
        host: "{{ ipmitool_lan_print.stdout }}"
        port: 80
        timeout: 5
  tasks:
    - name: install updated kernel
      yum:
        name:
          - kernel-3.10.0-693.11.6.el7
          - microcode_ctl-2.1-22.2.el7
        state: installed
  post_tasks:
    - name: check if system contains fix
      shell:
        cat /boot/config-$(uname -r)
      register: kernel_config
      changed_when: false
    - name: prepare kexec
      when: '"CONFIG_KAISER=y" not in kernel_config.stdout'
      block:
        - name: unload current target
          shell: kexec -u
        - name: load kexec target
          shell: >
            kexec -l /boot/vmlinuz-3.10.0-693.11.6.el7.x86_64 \
                  --initrd=/boot/initramfs-3.10.0-693.11.6.el7.x86_64.img \
                  --reuse-cmdline
        - debug:
            msg: Machine requires reboot and ready for `systemctl kexec`