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Commit 19a61219 authored by Alain Takoudjou's avatar Alain Takoudjou
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kvm: add support for RAM and CPU hotplug 

Allow to Add CPU or RAM in hotplug mode, without need of restart qemu process
parent 8dbf6b79
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Showing with 165 additions and 66 deletions
software/kvm/common.cfg
View file @ 19a61219
......@@ -41,6 +41,7 @@ parts = ${:common-parts}
[eggs]
recipe = zc.recipe.egg
interpreter = python.eggs
eggs =
${python-cffi:egg}
${python-cryptography:egg}
......@@ -89,7 +90,7 @@ command =
[template]
recipe = slapos.recipe.template
url = ${:_profile_base_location_}/instance.cfg.in
md5sum = bf5ef731c0d8da0267a4939882b4eeee
md5sum = 5a17fc127190bbc19361c5ffb10711b3
output = ${buildout:directory}/template.cfg
mode = 0644
......@@ -98,7 +99,7 @@ recipe = hexagonit.recipe.download
ignore-existing = true
url = ${:_profile_base_location_}/instance-kvm.cfg.jinja2
mode = 644
md5sum = e2b8f86bdc12c86e7d959b55c6d54f6d
md5sum = 152b052f4b418ab3138a3e109a3ec01e
download-only = true
on-update = true
......@@ -107,7 +108,7 @@ recipe = hexagonit.recipe.download
ignore-existing = true
url = ${:_profile_base_location_}/instance-kvm-cluster.cfg.jinja2.in
mode = 644
md5sum = 05b6004e8c7a94de14f247affcef4971
md5sum = b3ff4f80e4d607e2a977349416c66e39
download-only = true
on-update = true
......@@ -185,7 +186,7 @@ ignore-existing = true
url = ${:_profile_base_location_}/template/template-kvm-run.in
mode = 644
filename = template-kvm-run.in
md5sum = 178a24cdad77cb6c2e519ac629dd0e74
md5sum = 7f34fbb05f0cfdb6753e008e47cacf30
download-only = true
on-update = true
......@@ -195,7 +196,7 @@ ignore-existing = true
url = ${:_profile_base_location_}/template/kvm-controller-run.in
mode = 644
filename = kvm-controller-run.in
md5sum = 71afd2d13f6e56993ae413a168e012d7
md5sum = 9ba27ec934e0e86ef88493356a40bed5
download-only = true
on-update = true
......@@ -225,7 +226,7 @@ ignore-existing = true
url = ${:_profile_base_location_}/template/qemu-is-ready.in
mode = 644
filename = qemu-is-ready.in
md5sum = 0066fa0f5f3dd47bded5e5924df2550d
md5sum = b304eec8e2cb71f10ea83cac22f6db12
download-only = true
on-update = true
......
software/kvm/instance-kvm-cluster-input-schema.json
View file @ 19a61219
......@@ -197,6 +197,29 @@
"minimum": 128,
"multipleOf": 128
},
"hotplug-slot-size": {
"title": "Size of Hotpluggable RAM slot, in MB",
"description": "Define the RAM size to plug on one hotpluggable slot in MB, understand the size of one RAM bar. The RAM hotplugged on each slot will always have the same RAM size.",
"type": "integer",
"default": 512,
"minimum": 128,
"multipleOf": 128
},
"max-ram-hotplug-size": {
"title": "Maximum hotpluggable RAM size, in MB",
"description": "Define the maximum size of hotpluggable memory. The size is in MB and should be a multiple of the defined hotpluggable slot size.",
"type": "integer",
"default": 0,
"minimum": 128,
"multipleOf": 128
},
"hotplugged-slot-amount": {
"title": "Hotplugged RAM slot amount",
"description": "Define the number of Memory slot to hotplug. Ex: if slot-hotplug-size=512 MB, then to hotplug 1G of RAM 2 slots will be used.",
"type": "integer",
"default": 0,
"minimum": 0
},
"auto-ballooning": {
"title": "Enable qemu auto ballooning.",
"description": "Enable virtio balloon device to allows KVM guests to reduce/re-increase their memory size.",
......@@ -245,10 +268,17 @@
"type": "integer",
"minimum": 1
},
"cpu-options": {
"title": "CPU Additional options: cores, threads, sockets, maxcpus.",
"description": "Additional options to use with cpu-count. Options are separated by coma: [cores=cores][,threads=threads][,sockets=sockets][,maxcpus=maxcpus]. Set this option if you know what you're doing.",
"type": "string"
"max-cpu-hotplug-count": {
"title": "Maximum hotpluggable CPU amount",
"description": "Specifies the maximum number of hotpluggable CPUs.",
"type": "integer",
"default": 1
},
"cpu-hotplug-amount": {
"title": "hotpluggable CPU amount",
"description": "Specifies the number of CPUs to hotplug",
"type": "integer",
"default": 0
},
"numa": {
"title": "Simulate a multi node NUMA system.",
......
software/kvm/instance-kvm-cluster.cfg.jinja2.in
View file @ 19a61219
......@@ -51,11 +51,15 @@ config-authorized-key = {{ dumps(slapparameter_dict.get('authorized-keys') | joi
config-nbd-port = {{ dumps(kvm_parameter_dict.get('nbd-port', 1024)) }}
config-nbd2-port = {{ dumps(kvm_parameter_dict.get('nbd-port2', 1024)) }}
config-ram-size = {{ dumps(kvm_parameter_dict.get('ram-size', 1024)) }}
config-max-ram-hotplug-size = {{ dumps(kvm_parameter_dict.get('max-ram-hotplug-size', 0)) }}
config-hotplug-slot-size = {{ dumps(kvm_parameter_dict.get('hotplug-slot-size', 512)) }}
config-hotplugged-slot-amount = {{ dumps(kvm_parameter_dict.get('hotplugged-slot-amount', 0)) }}
config-disk-size = {{ dumps(kvm_parameter_dict.get('disk-size', 10)) }}
config-disk-type = {{ dumps(kvm_parameter_dict.get('disk-type', 'virtio')) }}
config-cpu-count = {{ dumps(kvm_parameter_dict.get('cpu-count', 1)) }}
config-max-cpu-hotplug-count = {{ dumps(kvm_parameter_dict.get('max-cpu-hotplug-count', 1)) }}
config-cpu-hotplug-amount = {{ dumps(kvm_parameter_dict.get('cpu-hotplug-amount', 0)) }}
{{ setconfig('numa', kvm_parameter_dict.get('numa', '')) }}
{{ setconfig('machine-options', kvm_parameter_dict.get('machine-options', '')) }}
{{ setconfig('cpu-options', kvm_parameter_dict.get('cpu-options', '')) }}
{{ setconfig('nbd-host', kvm_parameter_dict.get('nbd-host', '')) }}
{{ setconfig('host2', kvm_parameter_dict.get('host2', '')) }}
......
software/kvm/instance-kvm-input-schema.json
View file @ 19a61219
......@@ -12,6 +12,29 @@
"minimum": 128,
"multipleOf": 128
},
"hotplug-slot-size": {
"title": "Size of Hotpluggable RAM slot, in MB",
"description": "Define the RAM size to plug on one hotpluggable slot in MB, understand the size of one RAM bar. The RAM hotplugged on each slot will always have the same RAM size.",
"type": "integer",
"default": 512,
"minimum": 128,
"multipleOf": 128
},
"max-ram-hotplug-size": {
"title": "Maximum hotpluggable RAM size, in MB",
"description": "Define the maximum size of hotpluggable memory. The size is in MB and should be a multiple of the defined hotpluggable slot size.",
"type": "integer",
"default": 0,
"minimum": 128,
"multipleOf": 128
},
"hotplugged-slot-amount": {
"title": "Hotplugged RAM slot amount",
"description": "Define the number of Memory slot to hotplug. Ex: if slot-hotplug-size=512 MB, then to hotplug 1G of RAM 2 slots will be used.",
"type": "integer",
"default": 0,
"minimum": 0
},
"auto-ballooning": {
"title": "Enable qemu auto ballooning.",
"description": "Enable virtio balloon device to allows KVM guests to reduce/re-increase their memory size.",
......@@ -54,10 +77,17 @@
"type": "integer",
"minimum": 1
},
"cpu-options": {
"title": "CPU Additional options: cores, threads, sockets, maxcpus.",
"description": "Additional options to use with cpu-count. Options are separated by coma: [cores=cores][,threads=threads][,sockets=sockets][,maxcpus=maxcpus]. Set this option if you know what you're doing.",
"type": "string"
"max-cpu-hotplug-count": {
"title": "Maximum hotpluggable CPU amount",
"description": "Specifies the maximum number of hotpluggable CPUs.",
"type": "integer",
"default": 1
},
"cpu-hotplug-amount": {
"title": "CPU hotplug amount",
"description": "Specifies the number of CPUs to hotplug",
"type": "integer",
"default": 0
},
"numa": {
"title": "Simulate a multi node NUMA system.",
......
software/kvm/instance-kvm.cfg.jinja2
View file @ 19a61219
......@@ -62,10 +62,14 @@ storage-path = ${directory:srv}/passwd
bytes = 8
[kvm-controller-parameter-dict]
python-path = {{ python_executable }}
python-path = {{ python_eggs_executable }}
vnc-passwd = ${gen-passwd:passwd}
socket-path = ${directory:var}/qmp_socket
kvm-status-path = ${directory:var}/qemu-vm-is-ready
cpu-hotplug-amount = ${slap-parameter:cpu-hotplug-amount}
hotplugged-slot-amount = ${slap-parameter:hotplugged-slot-amount}
hotplug-slot-size = ${slap-parameter:hotplug-slot-size}
max-ram-hotplug-size = ${slap-parameter:max-ram-hotplug-size}
[kvm-parameter-dict]
python-path = {{ python_executable }}
......@@ -91,9 +95,10 @@ pid-file-path = ${directory:run}/pid_file
socket-path = ${kvm-controller-parameter-dict:socket-path}
smp-count = ${slap-parameter:cpu-count}
smp-options = ${slap-parameter:cpu-options}
max-smp-hotplug-count = ${slap-parameter:max-cpu-hotplug-count}
ram-size = ${slap-parameter:ram-size}
numa = ${slap-parameter:numa}
max-ram-hotplug-size = ${slap-parameter:max-ram-hotplug-size}
hotplug-slot-size = ${slap-parameter:hotplug-slot-size}
mac-address = ${create-mac:mac-address}
tap-mac-address = ${create-tap-mac:mac-address}
......@@ -143,7 +148,7 @@ disk-cache = ${slap-parameter:disk-cache}
disk-aio = ${slap-parameter:disk-aio}
auto-ballooning = ${slap-parameter:auto-ballooning}
machine-options = ${slap-parameter:machine-options}
cpu-options = ${slap-parameter:cpu-model}
cpu-hotplug-slot-size = ${slap-parameter:cpu-model}
log-file = ${directory:log}/qemu.log
......@@ -551,14 +556,15 @@ nbd2-port = 1024
nbd2-host =
ram-size = 1024
hotplug-slot-size = 512
max-ram-hotplug-size = 0
hotplugged-slot-amount = 0
disk-size = 10
disk-type = virtio
cpu-count = 1
# cpu-option is a string: [cores=cores][,threads=threads][,sockets=sockets][,maxcpus=maxcpus]
cpu-options =
# list of numa options separate by space: node,nodeid=1,cpus=9-15 node,nodeid=2,cpus=1,3,7
numa =
max-cpu-hotplug-count = 1
cpu-hotplug-amount = 0
disk-cache = writeback
disk-aio = native
auto-ballooning = True
......
software/kvm/instance.cfg.in
View file @ 19a61219
......@@ -93,6 +93,7 @@ context =
raw netcat_bin ${netcat:location}/bin/netcat
raw openssl_executable_location ${openssl:location}/bin/openssl
raw python_executable ${buildout:executable}
raw python_eggs_executable ${buildout:bin-directory}/${eggs:interpreter}
raw qemu_executable_location ${kvm:location}/bin/qemu-system-x86_64
raw qemu_img_executable_location ${kvm:location}/bin/qemu-img
raw qemu_start_promise_tpl ${template-qemu-ready:location}/${template-qemu-ready:filename}
......
software/kvm/template/kvm-controller-run.in
View file @ 19a61219
......@@ -6,40 +6,47 @@
import socket
import time
import os
from slapos.qemuqmpclient import QemuQMPWrapper
# XXX: to be factored with slapos.toolbox qemu qmp wrapper.
socket_path = '{{ parameter_dict.get("socket-path") }}'
vnc_password = '{{ parameter_dict.get("vnc-passwd") }}'
status_path = '{{ parameter_dict.get("kvm-status-path") }}'
if os.path.exists(status_path):
cpu_hotplug_amount = {{ parameter_dict.get("cpu-hotplug-amount", 0) }}
cpu_model = '{{ parameter_dict.get("cpu-model", '') }}'
max_ram_hotplug_size = {{ parameter_dict.get("max-ram-hotplug-size", 0) }}
ram_hotplug_amount = {{ parameter_dict.get("hotplugged-slot-amount", 0) }}
slot_hotplug_size = {{ parameter_dict.get("hotplug-slot-size", 512) }}
def update():
if os.path.exists(status_path):
os.unlink(status_path)
# Connect to KVM qmp socket
so = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
connected = False
while not connected:
qemu_wrapper = QemuQMPWrapper(socket_path)
try:
so.connect(socket_path)
except socket.error:
time.sleep(1)
else:
connected = True
data = so.recv(1024)
# Enable qmp
so.send('{ "execute": "qmp_capabilities" }')
data = so.recv(1024)
# Set VNC password
so.send('{ "execute": "change", ' \
'"arguments": { "device": "vnc", "target": "password", ' \
' "arg": "' + vnc_password + '" } }')
data = so.recv(1024)
# Finish
so.close()
with open(status_path, 'w') as status_file:
status_file.write("OK")
qemu_wrapper.setVNCPassword(vnc_password)
cpu_option_dict = {
'device': 'cpu',
'amount': cpu_hotplug_amount
}
if cpu_model:
cpu_option_dict['model'] = cpu_model
qemu_wrapper.updateDevice(cpu_option_dict)
if max_ram_hotplug_size > 0:
qemu_wrapper.updateDevice({
'device': 'memory',
'mem': ram_hotplug_amount * slot_hotplug_size,
'slot': slot_hotplug_size,
'nslot': max_ram_hotplug_size / slot_hotplug_size
})
except ValueError, e:
with open(status_path, 'w') as status_file:
status_file.write(str(e))
raise
with open(status_path, 'w') as status_file:
status_file.write("")
if __name__ == "__main__":
update()
software/kvm/template/qemu-is-ready.in
View file @ 19a61219
#!{{ dash }}
if [ -f "{{ qemu_ready_path }}" ]; then
FILE="{{ qemu_ready_path }}"
# don't start checks too fast
sleep 2
if [ -f "$FILE" ]; then
if [ "$(cat $FILE)" = "" ]; then
echo "VM correctly started."
else
>&2 echo "Qemu Controller failed"
>&2 cat $FILE
exit 1
fi
else
log_file="{{ qemu_service_log_file }}"
>&2 echo "Qemu process is not correctly started."
......
software/kvm/template/template-kvm-run.in
View file @ 19a61219
......@@ -39,13 +39,15 @@ tap_interface = '{{ parameter_dict.get("tap-interface") }}'
listen_ip = '{{ parameter_dict.get("ipv4") }}'
mac_address = '{{ parameter_dict.get("mac-address") }}'
tap_mac_address = '{{ parameter_dict.get("tap-mac-address") }}'
smp_count = '{{ parameter_dict.get("smp-count") }}'
smp_options = '{{ parameter_dict.get("smp-options") }}'.strip()
numa_list = '{{ parameter_dict.get("numa") }}'.split()
ram_size = '{{ parameter_dict.get("ram-size") }}'
smp_count = {{ parameter_dict.get("smp-count") }}
max_smp_hotplug_count = {{ parameter_dict.get("max-smp-hotplug-count") }}
numa_list = '{{ parameter_dict.get("numa", "") }}'.split()
ram_size = {{ parameter_dict.get("ram-size") }}
max_ram_hotplug_size = {{ parameter_dict.get("max-ram-hotplug-size") }}
slot_hotplug_size = {{ parameter_dict.get("hotplug-slot-size") }}
pid_file_path = '{{ parameter_dict.get("pid-file-path") }}'
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") }}
external_disk_format = '{{ parameter_dict.get("external-disk-format") }}'
disk_storage_dict = {}
disk_storage_list = """{{ parameter_dict.get("disk-storage-list") }}""".split('\n')
......@@ -144,6 +146,12 @@ def getMapStorageList(disk_storage_dict, external_disk_number):
lf.write('%s' % external_disk_number)
return id_list, external_disk_number
def getMemHotplugDict(max_mem_size, slot_size):
if max_mem_size == 0:
return None
number = max_mem_size / slot_size
return {'maxmem': max_mem_size + ram_size, 'slots': number}
# Download existing hard drive if needed at first boot
if not os.path.exists(disk_path) and virtual_hard_drive_url != '':
print('Downloading virtual hard drive...')
......@@ -255,15 +263,18 @@ if use_tap == 'true':
tap_interface, vhost),
'-device', 'virtio-net-pci,netdev=lan%s,mac=%s' % (number, tap_mac_address)]
smp = smp_count
if smp_options:
for option in smp_options.split(','):
key, val = option.split('=')
if key in ('cores', 'threads', 'sockets', 'maxcpus') and val.isdigit():
smp += ',%s=%s' % (key, val)
if not max_smp_hotplug_count >= 0:
raise ValueError("Max CPU hotpluggable count is not a valid interger")
smp ='%s,maxcpus=%s' % (smp_count, smp_count + max_smp_hotplug_count)
mem_dict = getMemHotplugDict(max_ram_hotplug_size, slot_hotplug_size)
if mem_dict is not None:
ram_string = '%sM,slots=%s,maxmem=%sM' % (ram_size, mem_dict['slots'], mem_dict['maxmem'])
else:
ram_string = '%s' % ram_size
kvm_argument_list = [qemu_path,
'-enable-kvm', '-smp', smp, '-name', vm_name,
'-m', ram_size, '-vga', 'std',
'-m', ram_string, '-vga', 'std',
'-drive', 'file=%s,if=%s,cache=%s,aio=%s' % (disk_path, disk_type, disk_cache, disk_aio),
'-vnc', '%s:1,ipv4,password' % listen_ip,
'-boot', 'order=cd,menu=on',
......
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