def _prepare_disks(vm_settings, target_dir):
"""
Prepare VM disks for OVF appliance creation.
File based disks will be copied to VM creation directory.
LVM and block-device based disks will be converted into file based images and copied to creation directory.
@param target_dir: directory where disks will be copied
"""
disk_list_dom = get_libvirt_conf_xml(vm_settings["vm_name"])\
.getElementsByTagName("domain")[0].getElementsByTagName("disk")
disk_num, disk_list = 0, []
for disk_dom in disk_list_dom:
if disk_dom.getAttribute("device") == "disk":
disk_num += 1
source_dom = disk_dom.getElementsByTagName("source")[0]
filename = "%s%d.img" % (vm_settings["template_name"], disk_num)
new_path = path.join(target_dir, filename)
if disk_dom.getAttribute("type") == "file":
disk_path = source_dom.getAttribute("file")
shutil.copy2(disk_path, new_path)
elif disk_dom.getAttribute("type") == "block":
source_dev = source_dom.getAttribute("dev")
execute("qemu-img convert -f raw -O qcow2 %s %s" %
(source_dev, new_path))
disk_dict = {
"file_size": str(get_file_size_bytes(new_path)),
"filename": filename,
"new_path": new_path,
"file_id": "diskfile%d" % (disk_num),
"disk_id": "vmdisk%d.img" % (disk_num),
"disk_capacity": str(get_kvm_disk_capacity_bytes(new_path))
}
disk_list.append(disk_dict)
return disk_list
def migrate(conn, uid, target_host, live=False, print_=True):
"""Migrate given container to a target_host"""
if not test_passwordless_ssh(target_host):
raise CommandException(
"Public key ssh connection with the target host could not be established"
)
log = get_logger()
# a workaround for the megadynamic nature of python variable type when called via an agent
live = live == 'True' if type(live) is str else live
# is ctid present on the target host?
ctid = get_ctid_by_uuid(conn, uid)
try:
execute("ssh %s vzlist %s" % (target_host, ctid))
raise CommandException(
"Target host '%s' has an already defined CTID '%s'" %
(target_host, ctid))
except CommandException as ce:
if ce.code != 256:
raise
msg = "Initiating migration to %s..." % target_host
log.info(msg)
live_trigger = '--online' if live else ''
for line in execute2("vzmigrate -v %s %s %s" %
(live_trigger, target_host, ctid)):
log.info(line)
def vm_diskspace(vm):
log = get_logger()
if conn.getType() == 'OpenVZ':
return {'/': openvz.get_diskspace(vm.name())}
# return a total sum of block devices used by KVM VM
# get list of block devices of a file type
try:
script_path = get_config().getstring('general', 'script_prefix',
'/opt/opennode/bin/')
cmd = os.path.join(
script_path, 'libvirt_detect_domain_devices.sh %s' % vm.name())
devices = execute(cmd).split('\n')
total_bytes = 0.0
for dev_path in devices:
if dev_path.strip() == '-':
continue # simple protection against non-disk base devices
cmd = os.path.join(
script_path,
'libvirt_get_device_size.sh %s %s' % (vm.name(), dev_path))
total_bytes += int(execute(
cmd)) / 1024.0 / 1024.0 # we want result to be in MB
except CommandException as ce:
log.debug('Failed diskspace detection: \'%s\'' % ce)
total_bytes = 0.0
except ValueError as ve:
log.debug('Failed diskspace conversion: \'%s\'' % ve)
total_bytes = 0.0
return {'/': total_bytes}
def _prepare_disks(vm_settings, target_dir):
"""
Prepare VM disks for OVF appliance creation.
File based disks will be copied to VM creation directory.
LVM and block-device based disks will be converted into file based images and copied to creation directory.
@param target_dir: directory where disks will be copied
"""
disk_list_dom = get_libvirt_conf_xml(vm_settings["vm_name"])\
.getElementsByTagName("domain")[0].getElementsByTagName("disk")
disk_num, disk_list = 0, []
for disk_dom in disk_list_dom:
if disk_dom.getAttribute("device") == "disk":
disk_num += 1
source_dom = disk_dom.getElementsByTagName("source")[0]
filename = "%s%d.img" % (vm_settings["template_name"], disk_num)
new_path = path.join(target_dir, filename)
if disk_dom.getAttribute("type") == "file":
disk_path = source_dom.getAttribute("file")
shutil.copy2(disk_path, new_path)
elif disk_dom.getAttribute("type") == "block":
source_dev = source_dom.getAttribute("dev")
execute("qemu-img convert -f raw -O qcow2 %s %s" % (source_dev, new_path))
disk_dict = {
"file_size": str(get_file_size_bytes(new_path)),
"filename": filename,
"new_path": new_path,
"file_id": "diskfile%d" % (disk_num),
"disk_id": "vmdisk%d.img" % (disk_num),
"disk_capacity": str(get_kvm_disk_capacity_bytes(new_path))
}
disk_list.append(disk_dict)
return disk_list
def delete_pool(pool_name):
"""Delete a storage pool"""
try:
execute("virsh 'pool-destroy %s'" %pool_name)
execute("virsh 'pool-undefine %s'" %pool_name)
del_folder(os.path.join(c('general', 'storage-endpoint'), pool_name))
if pool_name == c('general', 'default-storage-pool'):
set_default_pool('')
except Exception, e:
print "Failed to delete pool %s: %s" % (pool_name, e)
def generate_config(ovf_settings):
""" Generates ubc and non-ubc configuration """
base_conf = os.path.join('/etc/vz/conf', "ve-vswap-256m.conf-sample")
ubc_conf_str = generate_ubc_config(ovf_settings)
non_ubc_conf_str = generate_nonubc_config(base_conf, ovf_settings)
openvz_ct_conf = "%s\n%s\n" % (ubc_conf_str, non_ubc_conf_str) # final configuration is ubc + non-ubc
# overwrite configuration
target_conf_fnm = os.path.join('/etc/vz/conf/', "ve-%s.conf-sample" % ovf_settings["vm_id"])
with open(target_conf_fnm, 'w') as conf_file:
conf_file.write(openvz_ct_conf)
execute("chmod 644 %s" % target_conf_fnm)
def delete_pool(pool_name):
"""Delete a storage pool"""
try:
config = get_config()
if get_pool_path(pool_name) == '/storage/local':
raise Exception('/storage/local can not be deleted')
execute("virsh 'pool-destroy %s'" % pool_name)
execute("virsh 'pool-undefine %s'" % pool_name)
del_folder(get_pool_path(pool_name))
if pool_name == config.getstring('general', 'default-storage-pool'):
set_default_pool('')
except Exception, e:
raise Exception("Failed to delete pool %s: %s" % (pool_name, e))
def delete_pool(pool_name):
"""Delete a storage pool"""
try:
config = get_config()
if get_pool_path(pool_name) == '/storage/local':
raise Exception('/storage/local can not be deleted')
execute("virsh 'pool-destroy %s'" % pool_name)
execute("virsh 'pool-undefine %s'" % pool_name)
del_folder(get_pool_path(pool_name))
if pool_name == config.getstring('general', 'default-storage-pool'):
set_default_pool('')
except Exception, e:
raise Exception("Failed to delete pool %s: %s" % (pool_name, e))
def shutdown_vm(uuid):
"""Shutdown VM with a given UUID"""
ctid = get_ctid_by_uuid(uuid)
try:
print execute("vzctl stop %s" % ctid)
except CommandException as e:
if e.code == 13056: # sometimes umount fails
for i in range(5):
try:
print execute("vzctl umount %s" % ctid)
except CommandException:
import time
time.sleep(3)
def generate_config(ovf_settings):
""" Generates ubc and non-ubc configuration """
base_conf = os.path.join('/etc/vz/conf', "ve-vswap-256m.conf-sample")
ubc_conf_str = generate_ubc_config(ovf_settings)
non_ubc_conf_str = generate_nonubc_config(base_conf, ovf_settings)
openvz_ct_conf = "%s\n%s\n" % (ubc_conf_str, non_ubc_conf_str
) # final configuration is ubc + non-ubc
# overwrite configuration
target_conf_fnm = os.path.join('/etc/vz/conf/',
"ve-%s.conf-sample" % ovf_settings["vm_id"])
with open(target_conf_fnm, 'w') as conf_file:
conf_file.write(openvz_ct_conf)
execute("chmod 644 %s" % target_conf_fnm)
def shutdown_vm(conn, uuid):
"""Shutdown VM with a given UUID"""
ctid = get_ctid_by_uuid(conn, uuid)
log = get_logger()
try:
msg = execute("vzctl stop %s" % ctid)
log.info(msg)
except CommandException as e:
if e.code == 13056: # sometimes umount fails
for i in range(5):
try:
msg = execute("vzctl umount %s" % ctid)
log.info(msg)
except CommandException:
time.sleep(3)
def shutdown_vm(conn, uuid):
"""Shutdown VM with a given UUID"""
ctid = get_ctid_by_uuid(conn, uuid)
log = get_logger()
try:
msg = execute("vzctl stop %s" % ctid)
log.info(msg)
except CommandException as e:
if e.code == 13056: # sometimes umount fails
for i in range(5):
try:
msg = execute("vzctl umount %s" % ctid)
log.info(msg)
except CommandException:
time.sleep(3)
def prepare_file_system(settings, storage_pool):
"""
Prepare file system for VM template creation in OVF appliance format:
- create template directory if it does not exist
- copy disk based images
- convert block device based images to file based images
"""
config = get_config()
log = get_logger()
images_dir = path.join(config.getstring("general", "storage-endpoint"),
storage_pool, "images")
target_dir = path.join(config.getstring("general", "storage-endpoint"),
storage_pool, "kvm", "unpacked")
for disk_index, disk in enumerate(settings.get("disks", [])):
disk_template_path = path.join(target_dir, disk["template_name"])
if disk["deploy_type"] == "file":
volume_name = "disk%s" % disk_index
disk["source_file"] = '%s-%s-%s.%s' % (
settings["hostname"], settings["uuid"], volume_name,
disk.get('template_format', 'qcow2'))
disk_deploy_path = path.join(images_dir, disk["source_file"])
shutil.copy2(disk_template_path, disk_deploy_path)
# resize disk to match the requested
# XXX we assume that the size was already adjusted to the template requirements
diskspace = settings.get('disk')
if diskspace:
diskspace = int(
float(diskspace)
) # it's str by default. 'string' > int is always true (LEV-116)
# get the disk size
current_size = int(
execute(
"qemu-img info %s |grep 'virtual size' |awk '{print $4}' |cut -b2- "
%
disk_deploy_path)) / 1024 / 1024 / 1024 # to get to GB
if diskspace > current_size:
log.info('Increasing image file %s from %s to %sG' %
(disk_deploy_path, current_size, diskspace))
execute("qemu-img resize %s %sG" %
(disk_deploy_path, diskspace))
else:
log.info(
'Ignoring disk (%s) increase request (to %s) as existing image is already larger (%s)'
% (disk_deploy_path, diskspace, current_size))
elif disk["deploy_type"] in ["physical", "lvm"]:
disk_deploy_path = disk["source_dev"]
execute("qemu-img convert -f qcow2 -O raw %s %s" %
(disk_template_path, disk_deploy_path))
def get_netstats():
iface = get_config().getstring('general', 'main_iface')
return [
int(v) for v in execute(
"grep %s: /proc/net/dev | awk -F: '{print $2}' | "
"awk '{print $1, $9}'" % iface).split(' ')
]
def get_netstats():
return [
int(v) for v in
execute("vzctl exec %s \"cat /proc/net/dev|grep venet0 | "
"awk -F: '{print \$2}' | awk '{print \$1, \$9}'\"" %
vm.ID()).split(' ')
]
def get_uptime(ctid):
"""Get uptime in seconds. 0 if container is not running."""
try:
return float(
execute("vzctl exec %s \"awk '{print \$1}' /proc/uptime\"" % ctid))
except:
return 0
def get_swap_size_gb():
total_swap = 0
output = execute("swapon -s")
for dev_line in output.split("\n")[1:]:
size, used = map(int, re.split("\s+", dev_line)[2:4])
total_swap += size - used
return round(total_swap / 1024.0 ** 2, 3)
def get_template_name(ctid):
"""Return a name of the template used for creating specific container"""
try:
int(ctid)
except ValueError:
raise TemplateException("Incorrect format for a container id: %s" % ctid)
return execute("vzlist %s -H -o ostemplate" % ctid)
def get_onboot(ctid):
"""Return onboot parameter of a specified CT"""
# XXX: If ONBOOT is unset in conf (default for vzctl) then we use it as no
encoding = {"yes": 1,
"no": 0,
"-": 0}
return encoding[execute("vzlist %s -H -o onboot" % ctid).strip()]
def _get_stopped_vm_ids(conn):
# XXX a workaround for libvirt's python API listDefinedDomains function not reportng last OpenVZ VM
# correctly on rare occasion
if conn.getType() == "OpenVZ":
return execute("vzlist -H -S -o ctid").split()
else:
return conn.listDefinedDomains()
def get_swap_size_gb():
total_swap = 0
output = execute("swapon -s")
for dev_line in output.split("\n")[1:]:
size, used = map(int, re.split("\s+", dev_line)[2:4])
total_swap += (size - used)
return round(total_swap / 1024.0 ** 2, 3)
def _get_stopped_vm_ids(conn):
# XXX a workaround for libvirt's python API listDefinedDomains function not reportng last OpenVZ VM
# correctly on rare occasion
if conn.getType() == 'OpenVZ':
return execute('vzlist -H -S -o ctid').split()
else:
return conn.listDefinedDomains()
def get_hostname(ctid):
"""Return a hostname of the container"""
try:
int(ctid)
except ValueError:
raise TemplateException("Incorrect format for a container id: %s" % ctid)
return execute("vzlist %s -H -o hostname" % ctid)
def get_hostname(ctid):
"""Return a hostname of the container"""
try:
int(ctid)
except ValueError:
raise TemplateException("Incorrect format for a container id: %s" %
ctid)
return execute("vzlist %s -H -o hostname" % ctid)
def get_template_name(ctid):
"""Return a name of the template used for creating specific container"""
try:
int(ctid)
except ValueError:
raise TemplateException("Incorrect format for a container id: %s" %
ctid)
return execute("vzlist %s -H -o ostemplate" % ctid)
def get_disc_space_gb():
output = execute("df /vz")
tmp_output = output.split("\n", 1)
if len(tmp_output) != 2:
raise RuntimeError("Unable to calculate disk space")
df_list = tmp_output[1].split()
disk_space = float(df_list[3])
return round(disk_space / 1024 ** 2, 3)
def _get_running_vm_ids(conn):
# XXX a workaround for libvirt's listDomainsID function throwing error _and_
# screwing up snack screen if 0 openvz VMs available and no other backends present
if conn.getType() == 'OpenVZ' and \
'missing' == execute("vzlist -H > /dev/null 2>&1; if [ $? -eq 1 ]; then echo missing; fi"):
return []
else:
return conn.listDomainsID()
def _get_running_vm_ids(conn):
# XXX a workaround for libvirt's listDomainsID function throwing error _and_
# screwing up snack screen if 0 openvz VMs available and no other backends present
if conn.getType() == 'OpenVZ' and \
'missing' == execute("vzlist -H > /dev/null 2>&1; if [ $? -eq 1 ]; then echo missing; fi"):
return []
else:
return conn.listDomainsID()
def get_disc_space_gb():
output = execute("df /vz")
tmp_output = output.split("\n", 1)
if len(tmp_output) != 2:
raise RuntimeError("Unable to calculate disk space")
df_list = tmp_output[1].split()
disk_space = float(df_list[3])
return round(disk_space / 1024 ** 2, 3)
def get_openvz_stopped_ctids():
"""
Return a list of currently stopped OpenVZ CTs
@return: List of OpenVZ containers on current machine
@rtype: List
"""
return map(int,
[ctid for ctid in execute('vzlist -S -H -o ctid').splitlines()])
def _get_openvz_ct_id_list():
"""
Return a list of current OpenVZ CTs (both running and stopped)
@return: List of OpenVZ containers on current machine
@rtype: List
"""
existing = [ctid.strip() for ctid in execute("vzlist --all -H -o ctid").splitlines()]
return map(int, existing)
def get_openvz_all_ctids():
"""
Return a list of current OpenVZ CTs (both running and stopped)
@return: List of OpenVZ containers on current machine
@rtype: List
"""
return map(int, [ctid for ctid in
execute('vzlist --all -H -o ctid').splitlines()])
def cpu_usage():
time_list_now = map(int, execute("head -n 1 /proc/stat").split(' ')[2:6])
time_list_was = roll_data('/tmp/func-cpu-host', time_list_now, [0] * 6)
deltas = [yi - xi for yi, xi in zip(time_list_now, time_list_was)]
try:
cpu_pct = 1 - (float(deltas[-1]) / sum(deltas))
except ZeroDivisionError:
cpu_pct = 0
return cpu_pct
def _get_remote_ctid_list(remote_host):
"""Get list of ctid's from remote HN
@param remote_host: host to connect to (with username if provided)
"""
data = execute('ssh %s "vzlist -a -H -o ctid"' % remote_host)
# Clean up output so ssh identity errors will not hit conversion to int
data = [i for i in data.split('\n') if len(i) == 10
and i.startswith(' ')]
return map(int, data)
def migrate(uid, target_host, live=False):
"""Migrate given container to a target_host"""
if not test_passwordless_ssh(target_host):
raise CommandException("Public key ssh connection with the target host could not be established")
# is ctid present on the target host?
ctid = get_ctid_by_uuid(uid)
try:
execute("ssh %s vzlist %s" % (target_host, ctid))
raise CommandException("Target host '%s' already has a defined CTID '%s'" % (target_host, ctid))
except CommandException as ce:
if ce.code == 256:
pass
else:
raise ce
print "Initiating migration to %s..." % target_host
live_trigger = '--online' if live else ''
for line in execute2("vzmigrate -v %s %s %s" % (live_trigger, target_host, ctid)):
print line
def get_ioprio(ctid):
""" Get VM I/O priority. If priority is entered manually
or elsewhere, return approximate value based on value table"""
value = {'0': 0, '1': 0, '2': 0, '3': 0, '4': 4, '5': 7, '6': 7, '7': 7}
rv = execute("vzlist %s -H -o ioprio" % ctid).strip()
if rv == '-':
return 4
else:
return value[rv]
def get_openvz_stopped_ctids():
"""
Return a list of currently stopped OpenVZ CTs
@return: List of OpenVZ containers on current machine
@rtype: List
"""
return map(int, [ctid for ctid in
execute('vzlist -S -H -o ctid').splitlines()])
def get_kvm_disk_capacity_bytes(path):
print "Getting capacity of the kvm disk '%s'" % path
res = execute("virt-df --csv %s" % (path))
rows = res.split("\n")[2:]
capacity = 0
for row in rows:
row_elements = row.split(",")
used, available = int(row_elements[3]), int(row_elements[4])
capacity += used + available
return capacity * 1024
def list_pools():
"""List existing storage pools"""
pool_params = []
try:
pools = execute("virsh 'pool-list' | tail -n+3 |head -n-1").splitlines()
for p in pools:
p = re.sub("\s+" , " ", p.strip())
pool_params.append(p.split(' '))
except Exception, e:
print "Unable to list storage pools: %s" %e
def cpu_usage():
time_list_now = map(int,
execute("vzctl exec %s \"head -n 1 /proc/stat\"" % vm.ID()).split(' ')[2:6])
time_list_was = roll_data('/tmp/openvz-vm-cpu-%s' % vm.ID(), time_list_now, [0] * 6)
deltas = [yi - xi for yi, xi in zip(time_list_now, time_list_was)]
try:
cpu_pct = 1 - (float(deltas[-1]) / sum(deltas))
except ZeroDivisionError:
cpu_pct = 0
return cpu_pct
def prepare_file_system(settings, storage_pool):
"""
Prepare file system for VM template creation in OVF appliance format:
- create template directory if it does not exist
- copy disk based images
- convert block device based images to file based images
"""
images_dir = path.join(config.c("general", "storage-endpoint"),
storage_pool, "images")
target_dir = path.join(config.c("general", "storage-endpoint"),
storage_pool, "kvm", "unpacked")
for disk in settings["disks"]:
disk_template_path = path.join(target_dir, disk["template_name"])
if disk["deploy_type"] == "file":
disk_deploy_path = path.join(images_dir, settings["vm_type"] + "-" + disk["source_file"])
shutil.copy2(disk_template_path, disk_deploy_path)
elif disk["deploy_type"] in ["physical", "lvm"]:
disk_deploy_path = disk["source_dev"]
execute("qemu-img convert -f qcow2 -O raw %s %s" % (disk_template_path, disk_deploy_path))
def _get_remote_ctid_list(remote_host):
"""Get list of ctid's from remote HN
@param remote_host: host to connect to (with username if provided)
"""
data = execute('ssh %s "vzlist -a -H -o ctid"' % remote_host)
# Clean up output so ssh identity errors will not hit conversion to int
data = [
i for i in data.split('\n') if len(i) == 10 and i.startswith(' ')
]
return map(int, data)
def get_openvz_all_ctids():
"""
Return a list of current OpenVZ CTs (both running and stopped)
@return: List of OpenVZ containers on current machine
@rtype: List
"""
return map(
int,
[ctid for ctid in execute('vzlist --all -H -o ctid').splitlines()])
def query_openvz(include_running=False, fields='ctid,hostname'):
"""Run a query against OpenVZ"""
include_flag = '-S' if not include_running else '-a'
vzcontainers = execute("vzlist -H %s -o %s" % (include_flag, fields)).split('\n')
result = []
for cont in vzcontainers:
if len(cont.strip()) == 0:
break
result.append([f for f in cont.strip().split(' ') if len(f) > 0])
return result
def get_openvz_running_ctids():
"""
Return a list of currently running OpenVZ CTs
@return: List of OpenVZ containers on current machine
@rtype: List
"""
return map(int, [ctid for ctid in
execute('vzlist -H -o ctid').splitlines()
if 'Container' not in ctid])
def cpu_usage():
time_list_now = map(int,
execute("head -n 1 /proc/stat").split(' ')[2:6])
time_list_was = roll_data('/tmp/func-cpu-host', time_list_now, [0] * 6)
deltas = [yi - xi for yi, xi in zip(time_list_now, time_list_was)]
try:
cpu_pct = 1 - (float(deltas[-1]) / sum(deltas))
except ZeroDivisionError:
cpu_pct = 0
return cpu_pct
def migrate(conn, uid, target_host, live=False, print_=True):
"""Migrate given container to a target_host"""
if not test_passwordless_ssh(target_host):
raise CommandException("Public key ssh connection with the target host could not be established")
log = get_logger()
# a workaround for the megadynamic nature of python variable type when called via an agent
live = live == 'True' if type(live) is str else live
# is ctid present on the target host?
ctid = get_ctid_by_uuid(conn, uid)
try:
execute("ssh %s vzlist %s" % (target_host, ctid))
raise CommandException("Target host '%s' has an already defined CTID '%s'" % (target_host, ctid))
except CommandException as ce:
if ce.code != 256:
raise
msg = "Initiating migration to %s..." % target_host
log.info(msg)
live_trigger = '--online' if live else ''
for line in execute2("vzmigrate -v %s %s %s" % (live_trigger, target_host, ctid)):
log.info(line)
def get_openvz_running_ctids():
"""
Return a list of currently running OpenVZ CTs
@return: List of OpenVZ containers on current machine
@rtype: List
"""
return map(int, [
ctid for ctid in execute('vzlist -H -o ctid').splitlines()
if 'Container' not in ctid
])
def get_kvm_disk_capacity_bytes(path):
msg = "Getting capacity of the kvm disk '%s'" % path
get_logger().info(msg)
res = execute("virt-df --csv %s" % (path))
rows = res.split("\n")[2:]
capacity = 0
for row in rows:
row_elements = row.split(",")
used, available = int(row_elements[3]), int(row_elements[4])
capacity += used + available
return capacity * 1024
def query_openvz(include_running=False, fields='ctid,hostname'):
"""Run a query against OpenVZ"""
include_flag = '-S' if not include_running else '-a'
vzcontainers = execute("vzlist -H %s -o %s" %
(include_flag, fields)).split('\n')
result = []
for cont in vzcontainers:
if len(cont.strip()) == 0:
break
result.append([f for f in cont.strip().split(' ') if len(f) > 0])
return result
def list_pools():
"""List existing storage pools"""
pool_params = []
try:
pools = execute("virsh 'pool-list' | tail -n+3 |head -n-1 | egrep -v '^default-iso |^default '").splitlines()
for p in pools:
p = re.sub("\s+", " ", p.strip())
pool_params.append(p.split(' '))
except Exception, e:
msg = "Unable to list storage pools: %s" % e
get_logger().error(msg)
print msg
def get_ram_size_gb():
cmd_list = ["cat /proc/meminfo | grep MemFree",
"cat /proc/meminfo | grep Buffers",
"cat /proc/meminfo | grep Cached"]
memory = 0
for cmd in cmd_list:
output = execute(cmd)
try:
memory += int(output.split()[1])
except (ValueError, IndexError):
raise RuntimeError("Unable to calculate OpenNode server memory size")
return round(memory / 1024.0 ** 2, 3)
def prepare_file_system(settings, storage_pool):
"""
Prepare file system for VM template creation in OVF appliance format:
- create template directory if it does not exist
- copy disk based images
- convert block device based images to file based images
"""
config = get_config()
log = get_logger()
images_dir = path.join(config.getstring("general", "storage-endpoint"),
storage_pool, "images")
target_dir = path.join(config.getstring("general", "storage-endpoint"),
storage_pool, "kvm", "unpacked")
for disk_index, disk in enumerate(settings.get("disks", [])):
disk_template_path = path.join(target_dir, disk["template_name"])
if disk["deploy_type"] == "file":
volume_name = "disk%s" % disk_index
disk["source_file"] = '%s-%s-%s.%s' % (settings["hostname"], settings["uuid"],
volume_name, disk.get('template_format', 'qcow2'))
disk_deploy_path = path.join(images_dir, disk["source_file"])
shutil.copy2(disk_template_path, disk_deploy_path)
# resize disk to match the requested
# XXX we assume that the size was already adjusted to the template requirements
diskspace = settings.get('disk')
if diskspace:
diskspace = int(float(diskspace)) # it's str by default. 'string' > int is always true (LEV-116)
# get the disk size
current_size = int(execute("qemu-img info %s |grep 'virtual size' |awk '{print $4}' |cut -b2- "
% disk_deploy_path)) / 1024 / 1024 / 1024 # to get to GB
if diskspace > current_size:
log.info('Increasing image file %s from %s to %sG' % (disk_deploy_path,
current_size, diskspace))
execute("qemu-img resize %s %sG" % (disk_deploy_path, diskspace))
else:
log.info('Ignoring disk (%s) increase request (to %s) as existing image is already larger (%s)'
% (disk_deploy_path, diskspace, current_size))
elif disk["deploy_type"] in ["physical", "lvm"]:
disk_deploy_path = disk["source_dev"]
execute("qemu-img convert -f qcow2 -O raw %s %s" % (disk_template_path, disk_deploy_path))
def is_default_pool_modified():
"""Check if there were any modifications done by a user to the default pool"""
try:
config = get_config()
res = execute("virsh 'pool-dumpxml default'")
defined_path = parseString(res).getElementsByTagName('path')[0].lastChild.nodeValue
# XXX: This will remain as-is right now.
current_path = os.path.join(config.getstring('general', 'storage-endpoint'),
config.getstring('general', 'default-storage-pool'),
'images')
return str(defined_path) != current_path
except CommandException:
return False # pool is undefined or we are not sure -> so, assume it's all good
def cpu_usage():
time_list_now = map(
int,
execute("vzctl exec %s \"head -n 1 /proc/stat\"" %
vm.ID()).split(' ')[2:6])
time_list_was = roll_data('/tmp/openvz-vm-cpu-%s' % vm.ID(),
time_list_now, [0] * 6)
deltas = [yi - xi for yi, xi in zip(time_list_now, time_list_was)]
try:
cpu_pct = 1 - (float(deltas[-1]) / sum(deltas))
except ZeroDivisionError:
cpu_pct = 0
return cpu_pct
def configure_bridge(bridge, hello=None, fd=None, stp=None):
"""Set bridge parameters."""
if hello is not None:
execute('brctl sethello %s %d' % (bridge, hello))
if fd is not None:
execute('brctl setfd %s %d' % (bridge, fd))
if stp is not None:
execute('brctl stp %s %s' % (bridge, stp))
def configure_bridge(bridge, hello=None, fd=None, stp=None):
"""Set bridge parameters."""
if hello is not None:
execute('brctl sethello %s %d' % (bridge, hello))
if fd is not None:
execute('brctl setfd %s %d' % (bridge, fd))
if stp is not None:
execute('brctl stp %s %s' % (bridge, stp))
def list_pools():
"""List existing storage pools"""
pool_params = []
try:
pools = execute(
"virsh 'pool-list' | tail -n+3 |head -n-1 | egrep -v '^default-iso |^default '"
).splitlines()
for p in pools:
p = re.sub("\s+", " ", p.strip())
pool_params.append(p.split(' '))
except Exception, e:
msg = "Unable to list storage pools: %s" % e
get_logger().error(msg)
print msg
def is_default_pool_modified():
"""Check if there were any modifications done by a user to the default pool"""
try:
config = get_config()
res = execute("virsh 'pool-dumpxml default'")
defined_path = parseString(res).getElementsByTagName(
'path')[0].lastChild.nodeValue
# XXX: This will remain as-is right now.
current_path = os.path.join(
config.getstring('general', 'storage-endpoint'),
config.getstring('general', 'default-storage-pool'), 'images')
return str(defined_path) != current_path
except CommandException:
return False # pool is undefined or we are not sure -> so, assume it's all good
def dump_info(vms, csv):
"""Dump information about VMs of a certain hypervisor into a CSV file"""
for vm in vms:
ips = vm['interfaces']
if len(ips) > 0:
ip = ips[0].get('ipv4_address', ips[0]['mac'])
else:
ip = 'missing'
hn = execute('hostname')
# uptime in h
uptime_period = 60 * 60.0
name = vm['name']
mem = vm['memory'] / 1024.0
disk = vm['diskspace']['/'] / 1024.0
vcpus = vm['vcpu']
uptime = vm['uptime'] if vm['uptime'] else 0
uptime /= uptime_period
print name, mem, disk, vcpus, uptime, ip, hn
csv.writerow([name, mem, disk, vcpus, uptime, ip, hn])
