def multi(install_lists, task_id):
client.hset(task_id, "install_lists", install_lists)
# 取一个列表的 type和version, 一批机器的type 和 version 相同.
_type = install_lists[0]["type"]
version = install_lists[0]["version"]
# 因为手动安装是使用一个默认的配置文件, 如果多组机器同时安装, 配置文件需要在
# 所有的机器都安装完成之后删除, 所以用一个队列来保存正在安装的任务.
default_key = "default:%s:%s" % (_type, version)
client.lpush(default_key, "")
# 拷贝默认配置文件.
# 不能同时安装两种类型的机器;
# 而且还只能是一个版本.
cmd = r"sudo /bin/cp -f %s /var/lib/tftpboot/pxelinux.cfg/default" % \
PXELINUX_CFGS[_type][version]
rc, so, se = utils.shell(cmd)
# 执行安装任务.
pool = ThreadPool(MAX_THREAD_NUM)
install_results = pool.map(single, install_lists)
pool.close()
pool.join()
# 安装完成出队列.
client.rpop(default_key)
# 队列为空时, 说明没有任务要执行了, 删除配置文件.
if len(client.lrange(default_key, 0, -1)) == 0:
cmd = r"sudo /bin/rm -f /var/lib/tftpboot/pxelinux.cfg/default"
rc, so, se = utils.shell(cmd)
client.hset(task_id, "install_results", install_results)
return install_results
def del_tftp(self, mac):
cmd = r"sudo /bin/rm -f /var/lib/tftpboot/pxelinux.cfg/%s" % (mac)
rc, so, se = utils.shell(cmd)
if rc != 0:
return False
return True
def get_mac(self, nic):
cmd = "racadm getsysinfo -s"
r = self.ssh_cmd(cmd)
mac = 'echo "%s" | grep "%s" | awk \'{print $4}\'' % (r, nic)
rc, so, se = utils.shell(mac)
format_mac = so.replace(":", "-").lower()
constract_mac = "01-%s" % format_mac
return constract_mac.strip()
def ip(idc, sn):
cmd = '''nslookup idrac-%s.ilo.nosa.me. ddns0.%s01.nosa.me ''' % (
sn, idc)
rc, so, se = utils.shell(cmd)
if rc != 0:
return False
return so.strip().splitlines()[-1].split(":")[-1].strip()
def path_type(volume_path):
""" 根据 volume_path 判断 volume 类型是 file 还是 block.
"""
cmd = """virsh vol-info %s |grep "Type" |awk '{print $NF}' """ % volume_path
_type = utils.shell(cmd, strip=True)
if _type == "file":
_type = "qcow2"
elif _type == "block":
_type = "raw"
return _type
def constract_tftp(self, _type, version, mac):
""" 拷贝 pxelinux.cfg 配置文件到目标目录.
"""
cmd = r"sudo /bin/cp -f %s /var/lib/tftpboot/pxelinux.cfg/%s" % (
PXELINUX_CFGS[_type][version], mac)
rc, so, se = utils.shell(cmd)
if rc != 0:
return False
return True
def _shell(cmd, _logger=logger):
""" 执行命令, 记录日志.
"""
rc, so, se = utils.shell(cmd)
if rc == 0:
message = "cmd:%s" % cmd
_logger.info(message)
else:
message = "cmd:%s, error:%s" % (cmd, se)
raise Exception(message)
def get(self):
""" 返回 Nginx 的分支.
"""
cmd = "cd %s &&git fetch origin -p &&git branch -r" % NGINX_CONF_DIR
rc, so, se = utils.shell(cmd)
branches = [
i.strip().replace("origin/", "") for i in so.strip().splitlines()
if "origin/HEAD" not in i
]
self.write(json.dumps(branches))
def _shell(cmd, _logger=logger):
""" 执行命令, 记录日志.
"""
rc, so, se = utils.shell(cmd)
if rc == 0:
message = "cmd:%s" % cmd
_logger.info(message)
else:
message = "cmd:%s, error:%s" % (cmd, se)
raise Exception(message)
def get(self):
""" 返回 Nginx 的分支.
"""
cmd = "cd %s &&git fetch origin -p &&git branch -r" % NGINX_CONF_DIR
rc, so, se = utils.shell(cmd)
branches = [
i.strip().replace("origin/", "")
for i in so.strip().splitlines()
if "origin/HEAD" not in i
]
self.write(json.dumps(branches))
def resize(volume_name, volume_size):
""" 对存储池的一个 volume 改变大小, 这里只增大, 没法减小.
对于 qcow2 格式, 命令类似:
virsh vol-resize vm1_data --capacity 30G --pool vm_storage_pool
而且只能增大, 如果减小的话, 会报类似的错:
/usr/bin/qemu-img resize /vm_storage/vm1_data 32212254720)
unexpected exit status 1: This image format does not
support resize
另外对于 raw 格式, 不能用 virsh vol-resize, 如果想增大, 用如下命令:
lvextend -L +10G /dev/vm_storage_pool_vg/vm3
virsh pool-refresh --pool vm_storage_pool
这里不考虑 raw 格式.
"""
cmd = " virsh vol-resize {volume_name} --capacity {volume_size} --pool {vm_storage_pool}".format(
volume_name=volume_name,
volume_size=volume_size,
vm_storage_pool=STORAGE_POOL)
utils.shell(cmd)
def restore_rawos_from_qcow2_image(dst_os, wmi_data):
""" 把 qcow2 格式化的系统盘镜像恢复到 raw 格式的系统盘镜像.
"""
check_mfs()
# 拿到需要的文件路径.
src_os_url = wmi_data["os"]["tar"] # 用系统盘的 tar 包.
src_mbr = get_path_from_filename(
get_filename_from_url(wmi_data["partition"]["mbr"]["url"]))
src_boot = get_path_from_filename(
get_filename_from_url(wmi_data["partition"]["boot"]["url"]))
src_lvmheader = get_path_from_filename(
get_filename_from_url(wmi_data["partition"]["lvmheader"]["url"]))
src_swap_uuid = wmi_data["partition"]["swap"]["uuid"]
# 恢复 mbr.
utils.restore_mbr(src_mbr, dst_os)
# 映射系统盘中的设备, 拿到 boot, swap 和 lvm 设备路径.
x = utils.kpartx_av(dst_os)
dst_boot, dst_swap, dst_lvm = x[0], x[1], x[2] # kpartx 拿到结果是这个顺序.
# 恢复 boot 分区.
utils.restore_boot(src_boot, dst_boot)
# 恢复 swap 分区.
utils.make_swap(dst_swap, src_swap_uuid)
# 恢复 lvm header.
utils.restore_lvmheader(src_lvmheader, dst_lvm)
# 导入目标虚拟机中的 lvm, 拿到 vg name.
# vgimportclone 可能会报 fatal: not in vg 的错误, 升级 qemu-kvm 后解决.
try:
utils.vgimportclone(dst_lvm)
except Exception, e:
utils.shell("yum -y update qemu-kvm")
utils.vgimportclone(dst_lvm)
def post(file_path):
""" 上传文件到远程并拿到下载链接.
使用封装过的 wcdn 命令.
"""
cmd = " wcdn cp -f %s /cdn.internal.nosa.me/nginx_conf_deploy "\
"--no-verbose --md5" % file_path
rc, so, se = utils.shell(cmd)
if rc != 0:
raise Exception(se)
return "http://cdn.internal.nosa.me/nginx_conf_deploy/%s"\
% os.path.basename(file_path)
def post(file_path):
""" 上传文件到远程并拿到下载链接.
使用封装过的 wcdn 命令.
"""
cmd = " wcdn cp -f %s /cdn.internal.nosa.me/nginx_conf_deploy "\
"--no-verbose --md5" % file_path
rc, so, se = utils.shell(cmd)
if rc != 0:
raise Exception(se)
return "http://cdn.internal.nosa.me/nginx_conf_deploy/%s"\
% os.path.basename(file_path)
def upload_os_tar(volume_path, file_name):
""" 上传系统盘数据, 打出来 tar 包.
此函数创建的系统盘 tar 文件用于在 raw 格式的宿主机上创建虚拟机.
"""
check_mfs()
check_nbd()
from libs import volume
volume_path_type = volume.path_type(volume_path)
if volume_path_type == "qcow2":
nbd_device = utils.get_available_nbd_device()
utils.connect_nbd_device(nbd_device, volume_path)
volume_path = nbd_device
try:
cmd = "guestfish -a {path} run : list-filesystems".format(path=volume_path)
fs_text = utils.shell(cmd)
except Exception, e:
utils.shell("yum -y update qemu-kvm")
fs_text = utils.shell(cmd)
def create(volume_name, volume_size):
""" 创建 volume.
老存储结构用类似命令:
virsh vol-create-as --pool vm_storage_pool --name vm1.img \
--capacity 20G
新存储结构则用:
virsh vol-create-as --pool vm_storage_pool --name vm1.img \
--capacity 20G --allocation 1G --format qcow2
因为没有优雅的方法区分两种结构, 临时用下面命令来区分:
df |grep /vm_storage
存在 vm_storage 则是新结构, 否则是老结构.
"""
cmd = "df |grep /vm_storage"
try:
utils.shell(cmd)
cmd = """ virsh vol-create-as --pool {storage_pool} --name {volume_name} """\
"""--capacity {volume_size} --allocation 1G --format qcow2""".format(
storage_pool=STORAGE_POOL, volume_name=volume_name, volume_size=volume_size)
except Exception, e:
cmd = """ virsh vol-create-as --pool {storage_pool} --name {volume_name} """\
"""--capacity {volume_size} """.format(storage_pool=STORAGE_POOL,
volume_name=volume_name, volume_size=volume_size)
def check_mfs():
""" 通过本机挂载 mfs 上传, 所以要先检查 /mfs 是否已经挂载.
"""
try:
utils.shell("df -h |grep /mfs") # 先判断是否已经挂载 mfs.
except Exception, e:
cmd = "curl http://download.hy01.nosa.me/download/install_mfs_client.sh |bash"
utils.shell(cmd)
utils.shell("df -h |grep /mfs")
def path_size(volume_path):
""" 根据 volume_path 拿到 volume 大小, 单位是 G.
指令如下:
virsh vol-info /vm_storage/vm1 |grep Capacity |awk '{print $2,$3}'
"""
cmd = "virsh vol-info %s |grep Capacity |awk '{print $2,$3}' " % volume_path
return_out = utils.shell(cmd)
if "MiB" in return_out or "MB" in return_out:
space_total = int(return_out.split()[0].split(".")[0]) / 1024
elif "GiB" in return_out or "GB" in return_out:
volume_size = int(return_out.split()[0].split(".")[0])
elif "TiB" in return_out or "TB" in return_out:
volume_size = int(return_out.split()[0].split(".")[0]) * 1000
return volume_size # 这里是数字, 不加单位 G 了.
def lips(lb, ip, lips):
""" 配置 lb 的 lips.
"""
# 因为改了 DNS, 先清空本地 known_hosts 文件.
cmd = "cat /dev/null >%s" % LOCAL_SSH_KNOWN_HOSTS
rc, so, se = utils.shell(cmd)
if rc != 0:
message = "clean %s failed." % LOCAL_SSH_KNOWN_HOSTS
logger.error(message)
return False
message = "Waiting for network administor to change "\
"network conf for %s" % lb
logger.info(message)
# 发邮件让网络工程师修改 lb 的网络配置.
subject = u"[接入集群]请在一小时之内修改%s的网络设置, 否则集群会建立失败" % lb
context = ""
mail.mail(None, subject, context)
# 检查是否能够 ping 通.
time.sleep(120)
checkcmd = "ping -c 3 %s &>/dev/null" % ip
ret = utils.check_wait_null(checkcmd, timeinit=0,
interval=5, timeout=3600)
if not ret:
logger.error("Ping failed, lb:%s, ip:%s" % (lb, ip))
return False
# 配置 lip.
cmd = "sudo -i wdconfig lvsfullnat_lip"
rc, so, se = utils.remote_cmd(ip, cmd)
if rc != 0:
message = "Cfg lips failed, lb:%s, error:%s" % (lb, se)
logger.error(message)
return False
cmd = "cd /tmp/post_config/lvsfullnat_lip_config && "\
"sudo sh lvsfullnat_lip_config.sh %s " % " ".join(lips)
rc, so, se = utils.remote_cmd(ip, cmd)
if rc != 0:
message = "Cfg lips failed, lb:%s, error:%s" % (lb, se)
logger.error(message)
return False
return True
def check_nbd():
""" 检查 nbd 模块是否已经加载, 如果没有, 则自动加载(同时安装 qemu).
"""
try:
utils.shell("/sbin/lsmod | grep nbd")
except Exception, e:
cmd = "curl http://download.hy01.nosa.me/download/install_nbd.sh |bash"
utils.shell(cmd)
utils.shell("/sbin/lsmod | grep nbd")
return
def constract_tftp(self, _type, version, mac):
cmd = "sudo wget {url} -O {pxelinux_dir}/{mac}".format(
url=PXELINUX_CFGS[_type][version],
pxelinux_dir=PXELINUX_DIR,
mac=mac)
utils.shell(cmd, logger=logger)
def _umount(base_dir):
cmd = "df | grep %s | awk '{print $NF}'" % base_dir.rstrip("/")
umount_dirs = utils.shell(cmd, strip=True).splitlines()
umount_dirs = umount_dirs[::-1] # 反转, 先挂载的后卸载.
map(utils.umount, umount_dirs)
因为没有优雅的方法区分两种结构, 临时用下面命令来区分:
df |grep /vm_storage
存在 vm_storage 则是新结构, 否则是老结构.
"""
cmd = "df |grep /vm_storage"
try:
utils.shell(cmd)
cmd = """ virsh vol-create-as --pool {storage_pool} --name {volume_name} """\
"""--capacity {volume_size} --allocation 1G --format qcow2""".format(
storage_pool=STORAGE_POOL, volume_name=volume_name, volume_size=volume_size)
except Exception, e:
cmd = """ virsh vol-create-as --pool {storage_pool} --name {volume_name} """\
"""--capacity {volume_size} """.format(storage_pool=STORAGE_POOL,
volume_name=volume_name, volume_size=volume_size)
utils.shell(cmd)
cmd = "virsh vol-path --pool {storage_pool} {volume_name}".format(
storage_pool=STORAGE_POOL, volume_name=volume_name)
volume_path = utils.shell(cmd, strip=True)
return volume_path # 这里返回 volume 的路径.
def delete(volume_name):
""" 删除 volume.
"""
cmd = ''' virsh vol-delete --pool {storage_pool} {volume_name} '''.format(
storage_pool=STORAGE_POOL, volume_name=volume_name)
utils.shell(cmd)
dir = "/"
if dir == "/":
mount_root_cmds = "mount {path} {dir}".format(path=block_path,
dir=dir)
if dir != "/":
mount_cmds += "mount {path} /{dir} ".format(path=block_path,
dir=dir)
mount_cmds += ": "
# / 最先被挂载.
mount_cmds = mount_root_cmds + " : " + mount_cmds
cmd = "guestfish -a {block_path} run : {mount_cmds} tar-out / {file_path}".format(
block_path=volume_path,
mount_cmds=mount_cmds,
file_path=get_path_from_filename(file_name))
utils.shell(cmd)
if volume_path_type == "qcow2":
utils.disconnect_nbd_device(nbd_device)
return get_url_from_filename(file_name)
def _aggregate_log_dir(files):
""" 聚合日志.
检查名为 log 或 logs 的目录, 并聚合.
"""
log_dirs = list()
def vmlist():
cmd = ''' virsh list --all |egrep -i "running|stop|shut" |awk '{print $2}' '''
return_out = utils.shell(cmd)
return return_out.splitlines()
if volume.path_type(os_volume_path) == "raw":
storage.restore_rawos_from_qcow2_image(os_volume_path, wmi_data)
# 数据盘初始化.
init_data_volume_cmd = """virt-format -a {data_volume_path} --lvm=/dev/datavg/home --filesystem=ext4""".format(
data_volume_path=data_volume_path)
try:
utils.shell(init_data_volume_cmd)
except Exception, e:
utils.shell("yum -y update qemu-kvm")
utils.shell(init_data_volume_cmd)
# tar-in 数据到数据盘.
tar_in_cmd = """curl {data_url} | guestfish add {data_volume_path} : run : mount /dev/datavg/home / : tar-in - / compress:gzip""".format(
data_url=wmi_data["data"]["url"], data_volume_path=data_volume_path)
utils.shell(tar_in_cmd)
# volumes 用于创建配置文件.
if volume.path_type(os_volume_path) == "qcow2":
disk_type = "file"
driver_type = "qcow2"
source_type = "file"
else:
disk_type = "block"
driver_type = "raw"
source_type = "dev"
volumes = [{
"file": os_volume_path,
"dev": "vda",
"disk_type": disk_type,
"driver_type": driver_type,
def del_tftp(self, mac):
cmd = r"sudo /bin/rm -f {pxelinux_dir}/{mac}".format(
pxelinux_dir=PXELINUX_DIR, mac=mac)
utils.shell(cmd, logger=logger)
def shutdown(name):
""" 把一台 instance 停掉.
"""
cmd = ''' virsh destroy {name} '''.format(name=name)
utils.shell(cmd)
def create(wmi_id, wmi_name, name, excludes):
""" 根据一个虚拟机实例创建一个 wmi.
查看虚拟机实例的 blklist, 用下面命令:
virsh domblklist --domain vm1 |awk 'NR>2'
第一列是 device, 第二列是 volume_path
然后根据 volume_path 查看其大小:
virsh vol-info /vm_storage/vm1 |grep Capacity |awk '{print $2,$3}'
这里要注意的是, 由于我们兼容了两种格式的存储, 用 virsh vol-info volume_path
看到的 Type 是 block 的话, 是 raw 格式, 我们先把它转换成 qcow2 格式, 然后再
上传到远端, 上传成功后返回下载地址.
这里如果 device 是 vda 或者 hda, 则是系统盘, 其余是数据盘.
会把系统盘和数据盘存放到远程存储机器, 并拿到下载 url.
"""
cmd = "virsh domblklist --domain {name} |awk 'NR>2' ".format(name=name)
return_out = utils.shell(cmd, strip=True)
device_info = [ (i.split()[0],i.split()[1]) \
for i in return_out.splitlines() \
if i.split()[1] != "-" ]
# 如果实例的 volume 大于2, 可能数据有两个 volume, 此时 guestfish add data_volume
# 会缺数据, 所有要用 guestfish -d name, 而 -d name 参数需要关机.
def _is_running(_name):
cmd = """virsh list |grep running |awk '{print $2}'"""
runnings = [
i.strip() for i in utils.shell(cmd, strip=True).splitlines()
]
return _name in runnings
is_running = _is_running(name)
if len(device_info) > 2 and is_running:
raise Exception("{name} is running".format(name=name))
for device, volume_path in device_info:
if (device == "vda" or device == "hda"):
if "_os" not in locals():
os_file_name = "{wmi_id}_os".format(wmi_id=wmi_id)
url = storage.upload_os(volume_path, os_file_name)
_os = {
"device": device,
"size":
"{size}G".format(size=volume.path_size(volume_path)),
"url": url
}
# 对系统盘的数据打包, 仅供在 raw 格式的宿主机上使用.
os_tar_file_name = "{wmi_id}_os_tar".format(wmi_id=wmi_id)
_os["tar"] = storage.upload_os_tar(volume_path,
os_tar_file_name)
# 下面会用.
os_volume_path = volume_path
else:
if "_data" not in locals():
data_file_name = "{wmi_id}_data".format(wmi_id=wmi_id)
url = storage.upload_data(name, is_running, volume_path,
data_file_name, excludes)
_data = {
"device": device,
"size":
"{size}G".format(size=volume.path_size(volume_path)),
"url": url
}
logger.info("os volume:{os}".format(os=_os))
logger.info("data volume:{data}".format(data=_data))
# 为了实现在 raw 格式的宿主机上基于镜像创建虚拟机的时候尽量少的拷贝数据, 我们这里获取镜像的分区表信息,
# 并备份 mbr, boot 分区和 lvm header 信息.
# 当在 qcow2 格式的宿主机上基于镜像创建虚拟机的时候用不到此分区表信息.
_partition = storage.get_partition(os_volume_path, wmi_id)
logger.info("partition info:{partition}".format(partition=_partition))
return _os, _data, _partition
def del_tftp(self, mac):
cmd = r"sudo /bin/rm -f /var/lib/tftpboot/pxelinux.cfg/{mac}".format(mac=mac)
utils.shell(cmd, logger=logger)
def constract_tftp(self, _type, version, mac):
cmd = r"sudo /bin/cp -f {path} /var/lib/tftpboot/pxelinux.cfg/{mac}".format(
path=PXELINUX_CFGS[_type][version], mac=mac)
utils.shell(cmd, logger=logger)
def create_origin(name, uuid, version, vcpu, mem, os_size, data_size, ip,
location, netmask, gateway, ks, bridge):
""" 用传统方法创建 instance.
"""
# 确认 IP 是否合法.
if not utils.is_valid_ip(ip):
message = "ip:{ip} is illegal".format(ip=ip)
logger.warning(message)
raise Exception(message)
# 如果没有 location, 则下载.
if not os.path.isfile(location):
cmd = ''' wget {url} -O {location}'''.format(url=ISO_URLS[version],
location=location)
utils.shell(cmd)
# 创建系统盘.
os_volume_path = volume.create(name, os_size)
# 执行安装操作.
cmd = """virt-install --name {name} --uuid {uuid} --vcpus={vcpu} --ram {mem} """\
"""--disk path={os_volume_path} -localtime --accelerate """\
"""--location={location} -x "ip={ip} netmask={netmask} gateway={gateway} """\
"""dns={dns} dnsdomain={dnsdomain} ks={ks} console=tty0 console=ttyS0,115200n8" """\
"""--nographics --network bridge={bridge} --noautoconsole &>/dev/null""".format(
name=name, uuid=uuid, vcpu=vcpu, mem=mem, os_volume_path=os_volume_path,
location=location, ip=ip, netmask=netmask, gateway=gateway, dns=NAMESERVER,
dnsdomain=DOMAIN, ks=ks, bridge=bridge)
utils.shell(cmd)
# 设置自动启动.
cmd = "virsh autostart {name}".format(name=name)
utils.shell(cmd)
# 创建数据盘, 盘的标识是 ${name}_data.
data_volume = name + "_data"
data_volume_path = volume.create(data_volume, data_size)
# 默认也会自动增加第二块网卡.
interface.add(name, "br1")
# 删除一些无用配置, 不删的话起不来(第二种存储结构有问题, 第一种没问题).
cmd = """sed -i '/<kernel>/d' /etc/libvirt/qemu/{name}.xml;
sed -i '/<initrd>/d' /etc/libvirt/qemu/{name}.xml;
sed -i '/<cmdline>/d' /etc/libvirt/qemu/{name}.xml;
virsh define /etc/libvirt/qemu/{name}.xml
""".format(name=name)
utils.shell(cmd)
# 这里是安装完成之后自动重启.
check_cmd = "virsh list | grep -q {name} ".format(name=name)
start_cmd = "sleep 1 && sh libs/guestfish_origin.sh {name} {uuid} && virsh start {name} && sleep 1 ".format(
name=name, uuid=uuid)
if utils.check_wait(check_cmd, start_cmd):
logger.info("post start {name} success".format(name=name))
else:
message = "post start {name} timeout".format(name=name)
logger.warning(message)
raise Exception(message)
# 关联成 instance 的 vdb, 在装机完成之后 attach 的原因是:
# 我发现在装机开始就 attach 的话, vdb 会被搞成 swap,
# pvcreate 的时候就会失败.
volume.attach(name, data_volume_path, "vdb")
def _is_running(_name):
cmd = """virsh list |grep running |awk '{print $2}'"""
runnings = [
i.strip() for i in utils.shell(cmd, strip=True).splitlines()
]
return _name in runnings
def create_wmi(name, uuid, vcpu, mem, os_size, data_size, ip, hostname, wmi_id,
netmask, gateway, bridge):
""" 根据 wmi 创建 instance.
大概步骤是这样:
1. 根据 wmi_id 获取到 wmi 的信息, 数据结构类似.
2. 创建相应的系统盘和数据盘.
3. 下载对应的镜像, 覆盖掉上一步创建的盘.
4. 如果要求的 size 比 镜像中的大, 则增大空间.
5. 根据模板文件生成虚拟机配置文件, 需修改:
1). 硬盘信息; # 最麻烦
2). 网卡信息;
3). name;
4). uuid;
5). vcpu;
6). mem;
6. 定义配置文件, 修改系统镜像.
7. 启动系统.
8. 增加虚拟机机器的 DNS 记录.
"""
# 确认 IP 是否合法.
if not utils.is_valid_ip(ip):
message = "ip:{ip} is illegal".format(ip=ip)
logger.warning(message)
raise Exception(message)
# 获取 wmi 数据.
wmi_data = wmi.get(wmi_id)
os_name = name
os_volume_path = volume.create(os_name, os_size)
data_name = name + "_data"
data_volume_path = volume.create(data_name, data_size)
os_url = wmi_data["os"]["url"]
# 对于 qcow2 格式的系统盘, 直接 wget, 并重置大小.
if volume.path_type(os_volume_path) == "qcow2":
utils.wget(os_url, os_volume_path)
if int(os_size.strip("G")) > int(wmi_data["os"]["size"].strip("G")):
volume.resize(os_name, os_size)
if int(data_size.strip("G")) > int(
wmi_data["data"]["size"].strip("G")):
volume.resize(data_name, data_size)
# 对于 raw 格式的系统盘, 不能使用 wget.
# 一种选择是使用 qemu-img convert -O raw 命令,
# 但是会有系统盘大小的数据写入, 给 IO 造成很大压力.
# 这里我使用 分区表 的方式来减少 IO.
if volume.path_type(os_volume_path) == "raw":
storage.restore_rawos_from_qcow2_image(os_volume_path, wmi_data)
# 数据盘初始化.
init_data_volume_cmd = """virt-format -a {data_volume_path} --lvm=/dev/datavg/home --filesystem=ext4""".format(
data_volume_path=data_volume_path)
try:
utils.shell(init_data_volume_cmd)
except Exception, e:
utils.shell("yum -y update qemu-kvm")
utils.shell(init_data_volume_cmd)