yum install stratovirt
stratovirt -version

yum install make gcc bison flex openssl-devel elfutils-devel -y #编译工具

yum install kernel-source -y #内核源码

dnf -y --installroot=${rootfs_dir} --noplugins install systemd yum iproute iputils

size=`du -sh --block-size=1MiB ${rootfs_dir} | cut -f 1 | xargs`
size=$(($size+500))
img_file=${workdir}/img
dd if=/dev/zero of=${img_file} bs=1MiB count=$size && sync
mkfs.ext4 ${img_file}
root_mnt=${workdir}/rootmnt
mkdir -p ${root_mnt}
mount $img_file $root_mnt
tmp_dir=${workdir}/tmp

if [ ! -d ${tmp_dir} ]; then
    mkdir -p ${tmp_dir}
else
    rm -rf ${tmp_dir}/*
fi

if [ -f ${tmp_dir}/rootfs.tar ]; then
    rm ${tmp_dir}/rootfs.tar
fi

pushd ${rootfs_dir}
tar cpf ${tmp_dir}/rootfs.tar .
popd

pushd ${root_mnt}
tar xpf ${tmp_dir}/rootfs.tar -C .
popd

sync
sleep 10
umount ${root_mnt}      

/usr/bin/stratovirt \
    -machine microvm \
    -kernel  /usr/src/linux${kernel_src_version}/vmlinux.bin \
    -append "console=ttyS0 root=/dev/vda reboot=k panic=1" \
    -drive file=${workdir}/img,id=rootfs,readonly=off \
    -device virtio-blk-device,drive=rootfs,id=rootfs \
    -qmp unix:/tmp/stratovirt.socket,server,nowait \
    -serial stdio

[root@StratoVirt ~]# systemd-analyze 
Startup finished in 657ms (kernel) + 2.241s (userspace) = 2.898s 
graphical.target reached after 2.217s in userspace

[root@StratoVirt ~]# free -h
               total        used        free      shared  buff/cache   available
Mem:           228Mi        27Mi       179Mi       728Ki        21Mi       193Mi
Swap:             0B          0B          0B

[root@StratoVirt ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/root       1.1G  617M  375M  63% /
devtmpfs        112M     0  112M   0% /dev
tmpfs           115M     0  115M   0% /dev/shm
tmpfs            46M  728K   46M   2% /run
tmpfs           4.0M     0  4.0M   0% /sys/fs/cgroup
tmpfs           115M     0  115M   0% /tmp