7.4. オペレーティングシステムの問題のトラブルシューティング

# rpm-ostree kargs --append='crashkernel=256M'

# systemctl enable kdump.service

# systemctl reboot

$ cat << EOF | base64
path /var/crash
core_collector makedumpfile -l --message-level 7 -d 31
EOF

$ cat << EOF | base64
KDUMP_COMMANDLINE_REMOVE="hugepages hugepagesz slub_debug quiet log_buf_len swiotlb"
KDUMP_COMMANDLINE_APPEND="irqpoll nr_cpus=1 reset_devices cgroup_disable=memory mce=off numa=off udev.children-max=2 panic=10 rootflags=nofail acpi_no_memhotplug transparent_hugepage=never nokaslr novmcoredd hest_disable"
KEXEC_ARGS="-s"
KDUMP_IMG="vmlinuz"
EOF

$ cat << EOF > ./99-master-kdump-configuration.yaml
apiVersion: machineconfiguration.openshift.io/v1
kind: MachineConfig
metadata:
  labels:
    machineconfiguration.openshift.io/role: master 

  name: 99-master-kdump-configuration
spec:
  kernelArguments:
    - 'crashkernel=256M' 

  config:
    ignition:
      version: 3.2.0
    storage:
      files:
        - contents:
            source: data:text/plain;charset=utf-8;base64,ICAgIHBhdGggL3Zhci9jcmFzaAogICAgY2...  

          mode: 420
          overwrite: true
          path: /etc/kdump.conf
        - contents:
            source: data:text/plain;charset=utf-8;base64,S0RVTVBfQ09NTUFORExJTkVfUkVNT1ZFPS...  

          mode: 420
          overwrite: true
          path: /etc/sysconfig/kdump
    systemd:
      units:
        - enabled: true
          name: kdump.service
EOF

$ oc create -f ./99-master-kdump-configuration.yaml