Commit 7f7389e9 authored by Łukasz Nowak's avatar Łukasz Nowak

kvm: Minimise restart reaction of the KVM wrapper

Thanks to minimising amount of changing parameters of the wrapper, by setting
RAM and CPU to "init" values, it's possible to not restart the wrapper in case
of device hotplugging in for changes of those parameters.

Note that this shows regressiong to enable-device-hotplug which happened
after upgrade to qemu 5.2.0 in 8dc22418.

slapos.toolbox is added in order to use qemuqmpclient.
parent 46b637c1
...@@ -19,7 +19,7 @@ md5sum = 0d34ff81779115bf899f7bc752877b70 ...@@ -19,7 +19,7 @@ md5sum = 0d34ff81779115bf899f7bc752877b70
[template-kvm] [template-kvm]
filename = instance-kvm.cfg.jinja2 filename = instance-kvm.cfg.jinja2
md5sum = bf0c01ac7493693bb57ebef00bb20fa0 md5sum = 722b3e301b1166e7b18b777f68a7d74d
[template-kvm-cluster] [template-kvm-cluster]
filename = instance-kvm-cluster.cfg.jinja2.in filename = instance-kvm-cluster.cfg.jinja2.in
...@@ -55,7 +55,7 @@ md5sum = b7e87479a289f472b634a046b44b5257 ...@@ -55,7 +55,7 @@ md5sum = b7e87479a289f472b634a046b44b5257
[template-kvm-run] [template-kvm-run]
filename = template/template-kvm-run.in filename = template/template-kvm-run.in
md5sum = be750fb62f7057c97dd6c6887b2149cc md5sum = a502782244d1be536b732ebb40725f47
[template-kvm-controller] [template-kvm-controller]
filename = template/kvm-controller-run.in filename = template/kvm-controller-run.in
......
...@@ -437,13 +437,17 @@ disk-path = ${directory:srv}/virtual.${slap-parameter:disk-format} ...@@ -437,13 +437,17 @@ disk-path = ${directory:srv}/virtual.${slap-parameter:disk-format}
pid-file-path = ${kvm-controller-parameter-dict:pid-file} pid-file-path = ${kvm-controller-parameter-dict:pid-file}
socket-path = ${kvm-controller-parameter-dict:socket-path} socket-path = ${kvm-controller-parameter-dict:socket-path}
enable-device-hotplug = ${kvm-controller-parameter-dict:enable-device-hotplug} {%- set enable_device_hotplug = slapparameter_dict.get('enable-device-hotplug', 'false').lower() == 'true' %}
smp-count = ${kvm-controller-parameter-dict:cpu-count}
smp-max-count = {{ cpu_max_count }} smp-max-count = {{ cpu_max_count }}
ram-size = ${kvm-controller-parameter-dict:ram-size}
ram-max-size = {{ ram_max_size }} ram-max-size = {{ ram_max_size }}
{%- if enable_device_hotplug %}
init-ram-size = 1024 init-ram-size = 1024
init-smp-count = 1
{%- else %}
init-ram-size = ${kvm-controller-parameter-dict:ram-size}
init-smp-count = ${kvm-controller-parameter-dict:cpu-count}
{%- endif %}
mac-address = ${create-mac:mac-address} mac-address = ${create-mac:mac-address}
tap-mac-address = ${create-tap-mac:mac-address} tap-mac-address = ${create-tap-mac:mac-address}
......
...@@ -37,9 +37,9 @@ mac_address = '{{ parameter_dict.get("mac-address") }}' ...@@ -37,9 +37,9 @@ mac_address = '{{ parameter_dict.get("mac-address") }}'
tap_mac_address = '{{ parameter_dict.get("tap-mac-address") }}' tap_mac_address = '{{ parameter_dict.get("tap-mac-address") }}'
tap_ipv6_addr = '{{ parameter_dict.get("tap-ipv6-addr") }}' tap_ipv6_addr = '{{ parameter_dict.get("tap-ipv6-addr") }}'
numa_list = '{{ parameter_dict.get("numa", "") }}'.split() numa_list = '{{ parameter_dict.get("numa", "") }}'.split()
ram_size = {{ parameter_dict.get("ram-size") }}
ram_max_size = '{{ parameter_dict.get("ram-max-size") }}' ram_max_size = '{{ parameter_dict.get("ram-max-size") }}'
init_ram_size = {{ parameter_dict.get("init-ram-size") }} init_ram_size = {{ parameter_dict.get("init-ram-size") }}
init_smp_count = {{ parameter_dict.get("init-smp-count") }}
pid_file_path = '{{ parameter_dict.get("pid-file-path") }}' pid_file_path = '{{ parameter_dict.get("pid-file-path") }}'
external_disk_number = {{ parameter_dict.get("external-disk-number") }} external_disk_number = {{ parameter_dict.get("external-disk-number") }}
external_disk_size = {{ parameter_dict.get("external-disk-size") }} external_disk_size = {{ parameter_dict.get("external-disk-size") }}
...@@ -78,7 +78,6 @@ if not disk_info_list: ...@@ -78,7 +78,6 @@ if not disk_info_list:
{%- endfor %} {%- endfor %}
}) })
smp_count = {{ parameter_dict.get("smp-count") }}
smp_max_count = {{ parameter_dict.get("smp-max-count") }} smp_max_count = {{ parameter_dict.get("smp-max-count") }}
machine_options = '{{ parameter_dict.get("machine-options", "") }}'.strip() machine_options = '{{ parameter_dict.get("machine-options", "") }}'.strip()
cpu_model = '{{ parameter_dict.get("cpu-model") }}'.strip() cpu_model = '{{ parameter_dict.get("cpu-model") }}'.strip()
...@@ -267,12 +266,8 @@ if use_tap == 'true': ...@@ -267,12 +266,8 @@ if use_tap == 'true':
tap_interface, vhost), tap_interface, vhost),
'-device', 'virtio-net-pci,netdev=lan%s,mac=%s' % (number, tap_mac_address)] '-device', 'virtio-net-pci,netdev=lan%s,mac=%s' % (number, tap_mac_address)]
if enable_device_hotplug != 'true': smp = '%s,maxcpus=%s' % (init_smp_count, smp_max_count)
smp = '%s,maxcpus=%s' % (smp_count, smp_max_count) ram = '%sM,slots=128,maxmem=%sM' % (init_ram_size, ram_max_size)
ram = '%sM,slots=128,maxmem=%sM' % (ram_size, ram_max_size)
else:
smp = '1,maxcpus=%s' % smp_max_count
ram = '%sM,slots=128,maxmem=%sM' % (init_ram_size, ram_max_size)
kvm_argument_list = [qemu_path, kvm_argument_list = [qemu_path,
'-enable-kvm', '-smp', smp, '-name', vm_name, '-m', ram, '-vga', 'std', '-enable-kvm', '-smp', smp, '-name', vm_name, '-m', ram, '-vga', 'std',
......
...@@ -43,6 +43,7 @@ setup(name=name, ...@@ -43,6 +43,7 @@ setup(name=name,
install_requires=[ install_requires=[
'slapos.core', 'slapos.core',
'slapos.cookbook', 'slapos.cookbook',
'slapos.toolbox',
'slapos.libnetworkcache', 'slapos.libnetworkcache',
'erp5.util', 'erp5.util',
'supervisor', 'supervisor',
......
...@@ -46,6 +46,7 @@ import time ...@@ -46,6 +46,7 @@ import time
import shutil import shutil
import sys import sys
from slapos.qemuqmpclient import QemuQMPWrapper
from slapos.proxy.db_version import DB_VERSION from slapos.proxy.db_version import DB_VERSION
from slapos.recipe.librecipe import generateHashFromFiles from slapos.recipe.librecipe import generateHashFromFiles
from slapos.testing.testcase import makeModuleSetUpAndTestCaseClass from slapos.testing.testcase import makeModuleSetUpAndTestCaseClass
...@@ -203,6 +204,108 @@ i0:whitelist-firewall-{hash} RUNNING""", ...@@ -203,6 +204,108 @@ i0:whitelist-firewall-{hash} RUNNING""",
) )
@skipUnlessKvm
class TestMemoryManagement(InstanceTestCase, KvmMixin):
__partition_reference__ = 'i'
def getKvmProcessInfo(self, switch_list):
return_list = []
with self.slap.instance_supervisor_rpc as instance_supervisor:
kvm_pid = [q for q in instance_supervisor.getAllProcessInfo()
if 'kvm-' in q['name']][0]['pid']
kvm_process = psutil.Process(kvm_pid)
get_next = False
for entry in kvm_process.cmdline():
if get_next:
return_list.append(entry)
get_next = False
elif entry in switch_list:
get_next = True
return kvm_pid, return_list
def test(self):
kvm_pid_1, info_list = self.getKvmProcessInfo(['-smp', '-m'])
self.assertEqual(
['1,maxcpus=2', '1024M,slots=128,maxmem=1536M'],
info_list
)
self.rerequestInstance({
'ram-size': '1536',
'cpu-count': '2',
})
self.slap.waitForInstance(max_retry=10)
kvm_pid_2, info_list = self.getKvmProcessInfo(['-smp', '-m'])
self.assertEqual(
['2,maxcpus=3', '1536M,slots=128,maxmem=2048M'],
info_list
)
# assert that process was restarted
self.assertNotEqual(kvm_pid_1, kvm_pid_2, "Unexpected: KVM not restarted")
def tearDown(self):
self.rerequestInstance({})
self.slap.waitForInstance(max_retry=10)
def test_enable_device_hotplug(self):
def getHotpluggedCpuRamValue():
qemu_wrapper = QemuQMPWrapper(os.path.join(
self.computer_partition_root_path, 'var', 'qmp_socket'))
ram_mb = sum(
[q['size']
for q in qemu_wrapper.getMemoryInfo()['hotplugged']]) / 1024 / 1024
cpu_count = len(
[q['CPU'] for q in qemu_wrapper.getCPUInfo()['hotplugged']])
return {'cpu_count': cpu_count, 'ram_mb': ram_mb}
kvm_pid_1, info_list = self.getKvmProcessInfo(['-smp', '-m'])
self.assertEqual(
['1,maxcpus=2', '1024M,slots=128,maxmem=1536M'],
info_list
)
self.assertEqual(
getHotpluggedCpuRamValue(),
{'cpu_count': 0, 'ram_mb': 0}
)
parameter_dict = {
'enable-device-hotplug': 'true',
# to avoid restarts the max RAM and CPU has to be static
'ram-max-size': '2048',
'cpu-max-count': '4',
}
self.rerequestInstance(parameter_dict)
self.slap.waitForInstance(max_retry=2)
kvm_pid_2, info_list = self.getKvmProcessInfo(['-smp', '-m'])
self.assertEqual(
['1,maxcpus=4', '1024M,slots=128,maxmem=2048M'],
info_list
)
self.assertEqual(
getHotpluggedCpuRamValue(),
{'cpu_count': 0, 'ram_mb': 0}
)
self.assertNotEqual(kvm_pid_1, kvm_pid_2, "Unexpected: KVM not restarted")
parameter_dict.update(**{
'ram-size': '1536',
'cpu-count': '2'
})
self.rerequestInstance(parameter_dict)
self.slap.waitForInstance(max_retry=10)
kvm_pid_3, info_list = self.getKvmProcessInfo(['-smp', '-m'])
self.assertEqual(
['1,maxcpus=4', '1024M,slots=128,maxmem=2048M'],
info_list
)
self.assertEqual(kvm_pid_2, kvm_pid_3, "Unexpected: KVM restarted")
self.assertEqual(
getHotpluggedCpuRamValue(),
{'cpu_count': 1, 'ram_mb': 512}
)
class MonitorAccessMixin(object): class MonitorAccessMixin(object):
def sqlite3_connect(self): def sqlite3_connect(self):
sqlitedb_file = os.path.join( sqlitedb_file = os.path.join(
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment