Re: [Kimchi-devel] [PATCH v3] Backend support for templates with sockets, cores, and threads

In order to allow a guest to use SMT/hyperthreading, we should enable passing in of the sockets, cores, and threads values when creating a template. All three values must be specified, as per the topology descr at http://libvirt.org/formatdomain.html#elementsCPU v2->v3: - Set vcpus based on topology, if specified. - Move the update cpu+topology validation out to a function for redability - Add a minimum value of 1 for topology values - Leave new English error msg as empty string - Update the API documentation on cpu defaults v1->v2: - Added a check to make sure that vcpus = sockets*cores*threads - Set individual topoology params to required in API.json - Change the topology object types from string to integer - Always return cpu_info from templates lookup() - Removed check for cpu_info in to_vm_xml - Build cpu_info xml using lxml.builder instead of string - CPU and topology verification on template update Signed-off-by: Christy Perez <christy(a)linux.vnet.ibm.com&gt; --- docs/API.md | 13 ++++++++++- po/en_US.po | 3 +++ po/pt_BR.po | 3 +++ po/zh_CN.po | 3 +++ src/kimchi/API.json | 33 ++++++++++++++++++++++++-- src/kimchi/control/templates.py | 13 ++++++++--- src/kimchi/i18n.py | 1 + src/kimchi/model/templates.py | 52 +++++++++++++++++++++++++++++++++++++++++ src/kimchi/osinfo.py | 2 +- src/kimchi/vmtemplate.py | 15 ++++++++++++ 10 files changed, 131 insertions(+), 7 deletions(-) diff --git a/docs/API.md b/docs/API.md index cc438cc..7f1a8c2 100644 --- a/docs/API.md +++ b/docs/API.md @@ -179,7 +179,9 @@ Represents a snapshot of the Virtual Machine's primary monitor. * name: The name of the Template. Used to identify the Template in this API * os_distro *(optional)*: The operating system distribution * os_version *(optional)*: The version of the operating system distribution - * cpus *(optional)*: The number of CPUs assigned to the VM. Default is 1. + * cpus *(optional)*: The number of CPUs assigned to the VM. + Default is 1, unlees specifying a cpu topology. In that case, cpus + will default to a product of the topology values (see cpu_info). * memory *(optional)*: The amount of memory assigned to the VM. Default is 1024M. * cdrom *(optional)*: A volume name or URI to an ISO image. @@ -201,6 +203,15 @@ Represents a snapshot of the Virtual Machine's primary monitor. Independent Computing Environments * null: Graphics is disabled or type not supported * listen: The network which the vnc/spice server listens on. + * cpu_info *(optional)*: CPU-specific information. + * topology: Specify sockets, threads, and cores to run the virtual CPU + threads on. + All three are required in order to specify cpu topology. + * sockets - The number of sockets to use. + * cores - The number of cores per socket. + * threads - The number of threads per core. + If specifying both cpus and CPU topology, make sure cpus is + equal to the product of sockets, cores, and threads. ### Sub-Collection: Virtual Machine Network Interfaces diff --git a/po/en_US.po b/po/en_US.po index eb571ca..a88675c 100644 --- a/po/en_US.po +++ b/po/en_US.po @@ -371,6 +371,9 @@ msgstr "" msgid "Cannot identify base image %(path)s format" msgstr "" +msgid "When specifying CPU topology, VCPUs must be a product of sockets, cores, and threads." +msgstr "" + #, python-format msgid "Storage pool %(name)s already exists" msgstr "" diff --git a/po/pt_BR.po b/po/pt_BR.po index f2fba64..1bebe30 100644 --- a/po/pt_BR.po +++ b/po/pt_BR.po @@ -424,6 +424,9 @@ msgstr "Imagem base do modelo deve ser um arquivo de imagem local válido" msgid "Cannot identify base image %(path)s format" msgstr "Não foi possível identificar o formato da imagem base %(path)s" +msgid "When specifying CPU topology, VCPUs must be a product of sockets, cores, and threads." +msgstr "" + #, python-format msgid "Storage pool %(name)s already exists" msgstr "Storage pool %(name)s já existe" diff --git a/po/zh_CN.po b/po/zh_CN.po index f77e405..f944b8d 100644 --- a/po/zh_CN.po +++ b/po/zh_CN.po @@ -392,6 +392,9 @@ msgstr "模板基础镜像必须为一个有效的本地镜像文件" msgid "Cannot identify base image %(path)s format" msgstr "未能识别基础镜像%(path)s格式" +msgid "When specifying CPU topology, VCPUs must be a product of sockets, cores, and threads." +msgstr "" + #, python-format msgid "Storage pool %(name)s already exists" msgstr "存储池%(name)s已经存在" diff --git a/src/kimchi/API.json b/src/kimchi/API.json index 5b752dc..fe3df72 100644 --- a/src/kimchi/API.json +++ b/src/kimchi/API.json @@ -26,6 +26,33 @@ ] } } + }, + "cpu_info": { + "description": "Configure CPU specifics for a VM.", + "type": "object", + "properties": { + "topology": { + "description": "Configure the guest CPU topology.", + "type": "object", + "properties": { + "sockets": { + "type": "integer", + "required": true, + "minimum": 1 + }, + "cores": { + "type": "integer", + "required": true, + "minimum": 1 + }, + "threads": { + "type": "integer", + "required": true, + "minimum": 1 + } + } + } + }

} }, "properties": { @@ -448,7 +475,8 @@ "type": "array", "items": { "type": "string" } }, - "graphics": { "$ref": "#/kimchitype/graphics" } + "graphics": { "$ref": "#/kimchitype/graphics" }, + "cpu_info": { "$ref": "#/kimchitype/cpu_info" } }, "additionalProperties": false, "error": "KCHAPI0001E" @@ -612,7 +640,8 @@ "type": "array", "items": { "type": "string" } }, - "graphics": { "$ref": "#/kimchitype/graphics" } + "graphics": { "$ref": "#/kimchitype/graphics" }, + "cpu_info": { "$ref": "#/kimchitype/cpu_info" } }, "additionalProperties": false, "error": "KCHAPI0001E" diff --git a/src/kimchi/control/templates.py b/src/kimchi/control/templates.py index e17fa54..54caa92 100644 --- a/src/kimchi/control/templates.py +++ b/src/kimchi/control/templates.py @@ -38,13 +38,14 @@ def __init__(self, model, ident): self.update_params = ["name", "folder", "icon", "os_distro", "storagepool", "os_version", "cpus", "memory", "cdrom", "disks", "networks", - "graphics"] + "graphics", "cpu_info"] self.uri_fmt = "/templates/%s" self.clone = self.generate_action_handler('clone') @property def data(self): - return {'name': self.ident, + return_data = { + 'name': self.ident, 'icon': self.info['icon'], 'invalid': self.info['invalid'], 'os_distro': self.info['os_distro'], @@ -56,4 +57,10 @@ def data(self): 'storagepool': self.info['storagepool'], 'networks': self.info['networks'], 'folder': self.info.get('folder', []), - 'graphics': self.info['graphics']} + 'graphics': self.info['graphics'] + }

+ if (self.info.get('cpu_info')): + return_data['cpu_info'] = self.info['cpu_info'] + else: + return_data['cpu_info'] = ''

+ return return_data diff --git a/src/kimchi/i18n.py b/src/kimchi/i18n.py index 1b543ce..9ce8e86 100644 --- a/src/kimchi/i18n.py +++ b/src/kimchi/i18n.py @@ -131,6 +131,7 @@ "KCHTMPL0022E": _("Disk size must be an integer greater than 1GB."), "KCHTMPL0023E": _("Template base image must be a valid local image file"), "KCHTMPL0024E": _("Cannot identify base image %(path)s format"), + "KCHTMPL0025E": _("When specifying CPU topology, VCPUs must be a product of sockets, cores, and threads."), "KCHPOOL0001E": _("Storage pool %(name)s already exists"), "KCHPOOL0002E": _("Storage pool %(name)s does not exist"), diff --git a/src/kimchi/model/templates.py b/src/kimchi/model/templates.py index 9278cdc..04d2af9 100644 --- a/src/kimchi/model/templates.py +++ b/src/kimchi/model/templates.py @@ -48,6 +48,22 @@ def create(self, params): {'filename': iso, 'user': user, 'err': excp})

+ cpu_info = params.get('cpu_info') + if cpu_info: + cpu_info = dict(params['cpu_info']) + topology = cpu_info.get('topology')

+ # Check, even though currently only topology + # is supported. + if topology: + sockets = topology['sockets'] + cores = topology['cores'] + threads = topology['threads'] + vcpus = params.get('cpus') + if vcpus is None: + params['cpus'] = sockets * cores * threads + elif sockets * cores * threads != vcpus: + raise InvalidParameter("KCHTMPL0025E") +

conn = self.conn.get() pool_uri = params.get(u'storagepool', '') if pool_uri: @@ -154,6 +170,9 @@ def delete(self, name): def update(self, name, params): old_t = self.lookup(name)

+ if not self._verify_updated_cpu_params(params, old_t): + raise InvalidParameter('KCHTMPL0025E') + new_t = copy.copy(old_t) new_t.update(params)

ident = name @@ -187,6 +206,39 @@ def update(self, name, params): raise return ident + def _verify_updated_cpu_params(self, params, old_t): + # Note: cpu_info is the parent of topology. cpus is vcpus + # Keep two check_ variables for what we'll verify at the end to + # keep from duplicating code. + check_cpu = None + check_topology = None + # First see what parameters were passed in. + new_vcpus = params.get('cpus') + new_cpu_info = params.get('cpu_info') + new_topology = '' + if new_cpu_info: + new_topology = new_cpu_info.get('topology') + # Now figure out what needs to be verified. + if new_vcpus and new_topology: + check_cpu = new_vcpus + check_topology = new_topology + elif new_vcpus: + old_cpu_info = old_t.get('cpu_info') + if old_cpu_info: + old_topology = old_cpu_info.get('topology') + if old_topology: + check_cpu = new_vcpus + check_topology = old_topology + elif new_topology: + check_cpu = old_t.get('cpus') + check_topology = new_topology + # Now verify the cpu and topoloy parameters + if check_cpu and (check_cpu != check_topology['sockets'] * \ + check_topology['cores'] * check_topology['threads']): + return False + + return True + class LibvirtVMTemplate(VMTemplate): def __init__(self, args, scan=False, conn=None): diff --git a/src/kimchi/osinfo.py b/src/kimchi/osinfo.py index 6ee5e48..10d0ab0 100644 --- a/src/kimchi/osinfo.py +++ b/src/kimchi/osinfo.py @@ -32,7 +32,7 @@ 'power': ('ppc', 'ppc64')} -common_spec = {'cpus': 1, 'cpu_cores': 1, 'cpu_threads': 1, 'memory': 1024, +common_spec = {'cpus': 1, 'cpu_sockets': '1', 'cpu_cores': 1, 'cpu_threads': 1, 'memory': 1024,

'disks': [{'index': 0, 'size': 10}], 'cdrom_bus': 'ide', 'cdrom_index': 2, 'mouse_bus': 'ps2'} diff --git a/src/kimchi/vmtemplate.py b/src/kimchi/vmtemplate.py index 5f22db9..34720de 100644 --- a/src/kimchi/vmtemplate.py +++ b/src/kimchi/vmtemplate.py @@ -358,6 +358,19 @@ def _get_input_output_xml(self): input_output += sound % self.info return input_output

+ def _get_cpu_xml(self): + + cpu_info = self.info.get('cpu_info') + if cpu_info is not None: + cpu_topo = cpu_info.get('topology')

+ if cpu_topo is not None: + return etree.tostring(E.cpu(E.topology( + sockets=str(cpu_topo['sockets']), + cores=str(cpu_topo['cores']), + threads=str(cpu_topo['threads'])))) + + return ""

+ def to_vm_xml(self, vm_name, vm_uuid, **kwargs): params = dict(self.info) params['name'] = vm_name @@ -369,6 +382,7 @@ def to_vm_xml(self, vm_name, vm_uuid, **kwargs): params['qemu-stream-cmdline'] = '' graphics = kwargs.get('graphics') params['graphics'] = self._get_graphics_xml(graphics) + params['cpu_info'] = self._get_cpu_xml() # Current implementation just allows to create disk in one single # storage pool, so we cannot mix the types (scsi volumes vs img file) @@ -400,6 +414,7 @@ def to_vm_xml(self, vm_name, vm_uuid, **kwargs): <uuid>%(uuid)s</uuid> <memory unit='MiB'>%(memory)s</memory> <vcpu>%(cpus)s</vcpu> + %(cpu_info)s <os> <type arch='%(arch)s'>hvm</type> <boot dev='hd'/>