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| − | = Overview =
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| − | Nova-Compute uses z/VM driver to communicate with hypervisor z/VM and control virtual machines on IBM System z.This wiki introduces z/VM driver for Nova-Compute and some relate tools used by z/VM driver.
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| − | = Concepts =
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| − | == System z ==
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| − | [http://www-03.ibm.com/systems/z/ System z] is a family name used by IBM for all of its mainframe computers. IBM System z are the direct descendants of System/360, announced in 1964, and the System/370 from 1970s, and now includes the IBM System z9, the IBM System z10 and the newer IBM zEnterprise. System z is famous for its hight availability and used in government, financial services, retail, manufacturing, and just about every other industry.
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| − | == z/VM ==
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| − | [http://www.vm.ibm.com/ z/VM] is a hypervisor for the IBM System z platform that provides a highly flexible test and production environment. The z/VM implementation of IBM
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| − | virtualization technology provides the capability to run full-function operating systems such as Linux on System z, z/OS, and others as “guests” of z/VM. z/VM allows the capability for clients to run hundreds to thousands of Linux servers on a single mainframe running with other System z operating systems, such as z/OS, or as a large-scale linux-only enterprise server solution.
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| − | == xCAT ==
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| − | [http://sourceforge.net/apps/mediawiki/xcat/index.php?title=Main_Page xCAT] is an open source scalable distributed computing management and provisioning tool that provides a unified interface for hardware control, discovery, and OS diskful/diskfree deployment. It is used by NASA, University of Toronto, IBM, Adaptive Computing, Los Alamos
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| − | Laboratory and so on.
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| − | = Architecture =
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| − | Nova-Compute uses z/VM driver to communicate with xCAT REST api to control/configure z/VM. [http://sourceforge.net/apps/mediawiki/xcat/index.php?title=XCAT_zVM#Design_Architecture This picture] show the architure of xCAT and zVM
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| − | xCAT can be used to manage virtual servers spanning across multiple z/VM partitions. The xCAT management node (MN) runs on any Linux virtual server. It manages each z/VM partition using a System z hardware control point (zHCP) running on a privileged Linux virtual server. The zHCP interfaces with z/VM systems management API (SMAPI), directory manager (DirMaint), and control program layer (CP) to manage the z/VM partition. It utilizes a C socket interface to communicate with the SMAPI layer and VMCP Linux module to communicate with the CP layer.
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| − | = Prerequisites =
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| − | # One OpenStack nova-compute service node will manage one and only one xCAT MN node.
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| − | # Each of the zVM systems (reside in different LPARs or CECs ) has one nova-compute service node
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| − | # zHCP must be managed by xCAT MN.
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| − | # Compute Node and xCAT MN can ssh each other without password.
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| − | = Configuration =
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| − | By default /etc/nova/nova.conf, these options are required:
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| − | # Use z/VM
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| − | compute_driver = zvm.ZVMDriver
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| − | network_api_class = nova.network.quantumv2.api.API
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| − | libvirt_vif_driver = nova.virt.libvirt.vif.LibvirtHybridOVSBridgeDriver
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| − | # Only tgz is valid for now
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| − | config_drive_format=tgz
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| − | # Host name or IP address of xCAT management_node
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| − | zvm_xcat_server = 192.168.1.100
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| − | # xCAT username
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| − | zvm_xcat_username = root
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| − | # Password of the xCAT user
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| − | zvm_xcat_password = xxxxxxx
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| − | # z/VM disk pool for ephemeral disks
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| − | zvm_diskpool = pool1
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| − | # z/VM host that managed by xCAT MN
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| − | zvm_host = system360
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| − | # Default zfcp scsi disk pool
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| − | zvm_scsi_pool = smpool
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| − | # Valid optiosns are: 'architecture' -- attempt relocation even though hardware architecture facilities or CP features are not available on destination system; 'domain' -- attempt relocation even though VM would be moved outside of its domain, or 'domain' -- relocation should proceed even if CP determines that there are insufficient storage resources on destination system
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| − | zvm_vmrelocate_force = architecture
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| − | # User profile for creating a z/VM userid
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| − | zvm_user_profile = myprofile
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| − | # The xCAT MM node name
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| − | zvm_xcat_master = xcatmaster
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| − | These options are optional, and the values listed below are default values:
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| − | # xCAT group for OpenStack
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| − | zvm_xcat_group = all
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| − | # Default disk type for root disk, can be ECKD/FBA
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| − | zvm_disk_pool_type = ECKD
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| − | # Sets the admin password in the config drive
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| − | zvm_config_drive_inject_password = False
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| − | # Valid options are: 'yes' -- VMRELOCATE command will do one early pass through virtual machine storage and then go directly to the quiesce stage, or 'no' -- specifies immediate processing
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| − | zvm_vmrelocate_immediate = yes
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| − | # Maximum wait time(seconds) for relocation to complete
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| − | zvm_vmrelocate_max_total = nolimit
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| − | # Maximum quiesce time(seconds) a VM may be stopped during a relocation attempt
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| − | zvm_vmrelocate_max_quiesce = nolimit
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| − | # Timeout(seconds) when start an instance.
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| − | zvm_reachable_timeout = 180
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| − | # Default password for a new created z/VM user
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| − | zvm_user_default_password = password
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| − | # Default OS password for a new created z/VM user
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| − | zvm_os_default_password = ospass
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| − | # Default privilege level for a new created z/VM user
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| − | zvm_user_default_privilege = g
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| − | # The path to store the z/VM image files
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| − | zvm_image_tmp_path = /opt/stack/data/nova/images
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| − | # The period(days) to clean up an image that not be used for deploy in one xCAT MN within the defined time
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| − | xcat_image_clean_period = 30
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| − | # The threshold for xCAT free space, if snapshot or spawn check xCAT free space not enough for its image operations, it will prune image to meet the threshold
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| − | xcat_free_space_threshold = 50
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| − | = More information =
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| − | [https://blueprints.launchpad.net/nova/+spec/zvm-plugin zvm-plugin blueprint]
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| − |
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| − | = References =
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| − | # [http://www.vm.ibm.com z/VM]
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| − | # [http://sourceforge.net/apps/mediawiki/xcat/index.php?title=Main_Page xCAT]
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| − | # [http://sourceforge.net/apps/mediawiki/xcat/index.php?title=XCAT_zVM xCAT on z/VM]
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| − | # http://en.wikipedia.org/wiki/Z/VM
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| − | # http://en.wikipedia.org/wiki/System_z
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