• serial log
  • 1.host log
  • 2.guest log
    • 2.1 kvm guest
    • 2.2 xen guest

serial log

1.host log

在grub.cfg中加上==console=tty0 console=ttyS0,115200n8==，就可以拿到机器的串口log

如：BOOT_IMAGE=/vmlinuz-3.10.0 root=/dev/mapper/rhel-root ro pcm=0x800000000@0x880000000 pcm_sample_window=30000 crashkernel=auto rd.lvm.lv=rhel/root rd.lvm.lv=rhel/swap intel_iommu=on LANG=en_US.UTF-8 console=tty0 console=ttyS0,115200n8 pcmtest=mtr-replay

2.guest log

2.1 kvm guest

2.1.1 把guest grub.cfg文件中”rhgb quiet” to “console=ttyS0,115200,8n1”
2.1.2 起guest:
qemu-system-x86_64 -enable-kvm -m 4096 -smp 4 -sgx epc=512K -serial pty -cpu host -device virtio-net-pci,netdev=nic0,mac=00:16:3e:0c:12:78 -netdev tap,id=nic0,script=/etc/kvm/qemu-ifup -drive file=ubuntu_sgx.qcow2,if=none,id=virtio-disk0 -device virtio-blk-pci,drive=virtio-disk0

#-serial stdio直接输出到屏幕上 2.1.3连接串口

minicom -D /dev/pts/X

2.2 xen guest

2.2.1 把guest grub.cfg文件中”rhgb quiet” to “console=ttyS0,115200,8n1”
2.2.2 起guest:(xl create -c config.cfg)

[root@l1xen haibin]# cat config.test
builder = "hvm"
name = "lmce"
vcpus = 2
memory = 1024
disk = [ '/dev/sdb, raw, xvda, rw' ]
cpus = [ '2', '3' ]
device_model_override = '/usr/local/lib/xen/bin/qemu-system-i386'
device_model_version = 'qemu-xen'
sdl = 0
vnc = 1
vnclisten = '0.0.0.0'
stdvga = 1
hap = 1
hpet = 1
serial = 'pty'
on_crash = 'preserve'
lmce = 1

2.2.3 连接串口

xl console domid