InfoScale™ 9.0 Virtualization Guide - Linux

Last Published:
Product(s): InfoScale & Storage Foundation (9.0)
Platform: Linux
  1. Section I. Overview of InfoScale solutions used in Linux virtualization
    1. Overview of supported products and technologies
      1.  
        Overview of the InfoScale Virtualization Guide
      2. About InfoScale support for Linux virtualization environments
        1.  
          About SmartIO in the Linux virtualized environment
        2.  
          About the SmartPool feature
      3. About KVM technology
        1.  
          Kernel-based Virtual Machine Terminology
        2.  
          VirtIO disk drives
      4.  
        About InfoScale deployments in OpenShift Virtualization environments
      5.  
        About InfoScale deployments in OpenStack environments
      6.  
        Virtualization use cases addressed by InfoScale
      7.  
        About virtual-to-virtual (in-guest) clustering and failover
  2. Section II. Implementing a basic KVM environment
    1. Getting started with basic KVM
      1.  
        Creating and launching a kernel-based virtual machine (KVM) host
      2.  
        RHEL-based KVM installation and usage
      3.  
        Setting up a kernel-based virtual machine (KVM) guest
      4.  
        About setting up KVM with InfoScale solutions
      5. InfoScale solutions configuration options for the kernel-based virtual machines environment
        1.  
          Dynamic Multi-Pathing in the KVM guest virtualized machine
        2.  
          DMP in the KVM host
        3.  
          SF in the virtualized guest machine
        4.  
          Enabling I/O fencing in KVM guests
        5.  
          SFCFSHA in the KVM host
        6.  
          DMP in the KVM host and guest virtual machine
        7.  
          DMP in the KVM host and SFHA in the KVM guest virtual machine
        8.  
          VCS in the KVM host
        9.  
          VCS in the guest
        10.  
          VCS in a cluster across virtual machine guests and physical machines
      6.  
        Installing InfoScale in a KVM environment
      7. Installing and configuring VCS in a kernel-based virtual machine (KVM) environment
        1.  
          How VCS manages virtual machine guests
    2. Configuring KVM resources
      1.  
        About KVM resources
      2. Configuring storage
        1.  
          Consistent storage mapping in the KVM environment
        2. Mapping devices to the guest
          1.  
            Mapping DMP meta-devices
          2.  
            Consistent naming across KVM Hosts
          3.  
            Mapping devices using paths
          4.  
            Mapping devices using volumes
          5.  
            Mapping devices using the virtio-scsi interface
        3.  
          Resizing devices
      3. Configuring networking
        1. Bridge network configuration
          1.  
            Host network configuration
          2.  
            Configuring guest network
        2.  
          Network configuration for VCS cluster across physical machines (PM-PM)
        3.  
          Standard bridge configuration
        4.  
          Network configuration for VM-VM cluster
  3. Section III. Implementing InfoScale an OpenStack environment
    1. Installing and configring resources in an OpenStack environment
      1.  
        About installing and configuring the OpenStack environment
      2.  
        About installing and configuring InfoScale on OpenStack VMs
  4. Section IV. Implementing Linux virtualization use cases
    1. Application visibility and device discovery
      1.  
        About storage to application visibility using InfoScale Operations Manager
      2.  
        About KVM virtualization discovery in InfoScale Operations Manager
      3.  
        About Microsoft Hyper-V virtualization discovery
      4.  
        Virtual machine discovery in Microsoft Hyper-V
      5.  
        Storage mapping discovery in Microsoft Hyper-V
    2. Server consolidation
      1.  
        Server consolidation
      2.  
        Implementing server consolidation for a simple workload
    3. Physical to virtual migration
      1.  
        Physical to virtual migration
      2.  
        How to implement physical to virtual migration (P2V)
    4. Simplified management
      1.  
        Simplified management
      2. Provisioning storage for a guest virtual machine
        1.  
          Provisioning VxVM volumes as data disks for VM guests
        2.  
          Provisioning VxVM volumes as boot disks for guest virtual machines
      3. Boot image management
        1.  
          Creating the boot disk group
        2.  
          Creating and configuring the golden image
        3.  
          Rapid Provisioning of virtual machines using the golden image
        4.  
          Storage Savings from space-optimized snapshots
    5. Application availability using Cluster Server
      1.  
        About application availability options
      2.  
        Cluster Server in a KVM environment architecture summary
      3.  
        Virtual to Virtual clustering and failover
      4.  
        I/O fencing support for Virtual to Virtual clustering
      5.  
        Virtual to Physical clustering and failover
      6.  
        Recommendations for improved resiliency of InfoScale clusters in virtualized environments
    6. Virtual machine availability
      1.  
        About virtual machine availability options
      2.  
        VCS in host monitoring the Virtual Machine as a resource
      3.  
        Validating the virtualization environment for virtual machine availability
    7. Virtual machine availability for live migration
      1.  
        About live migration
      2.  
        Live migration requirements
      3. About Flexible Storage Sharing
        1.  
          Flexible Storage Sharing use cases
        2.  
          Limitations of Flexible Storage Sharing
      4.  
        Configure Storage Foundation components as backend storage for virtual machines
      5.  
        Implementing live migration for virtual machine availability
    8. Virtual to virtual clustering in a Hyper-V environment
      1.  
        Installing and configuring Cluster Server with Microsoft Hyper-V virtual-to-virtual clustering
    9. Virtual to virtual clustering in an OVM environment
      1.  
        Installing and configuring Cluster Server for Oracle Virtual Machine (OVM) virtual-to-virtual clustering
      2.  
        Storage configuration for VCS support in Oracle Virtual Machine (OVM)
    10. Multi-tier business service support
      1.  
        About Virtual Business Services
      2.  
        Sample virtual business service configuration
      3. Recovery of Multi-tier Applications managed with Virtual Business Services in InfoScale Operations Manager
        1.  
          Service Group Management in Virtual Business Services
    11. Managing Docker containers with InfoScale Enterprise
      1.  
        About managing Docker containers with InfoScale Enterprise
      2. About the Cluster Server agents for Docker, Docker Daemon, and Docker Container
        1.  
          Supported software
        2.  
          How the agents make Docker containers highly available
        3.  
          Documentation reference
      3. Managing storage capacity for Docker containers
        1.  
          Provisioning storage for Docker infrastructure from the Arctera File System
        2. Provisioning data volumes for Docker containers
          1.  
            Provisioning storage on Arctera File System as data volumes for containers
          2.  
            Provisioning VxVM volumes as data volumes for containers
          3.  
            Creating a data volume container
        3. Automatically provision storage for Docker Containers
          1.  
            Installing the InfoScale Docker volume plugin
          2.  
            Configuring a disk group
          3.  
            Creating Docker containers with storage attached automatically
          4.  
            Avoid noisy neighbor problem by using Quality of Service support
          5.  
            Provision to create snapshots
          6.  
            Configuring Veritas volume plugin with Docker 1.12 Swarm mode
        4.  
          About using InfoScale Enterprise features to manage storage for containers
      4. Offline migration of Docker containers
        1.  
          Migrating Docker containers
        2.  
          Migrating Docker Daemons and Docker Containers
      5. Disaster recovery of volumes and file systems in Docker environments
        1.  
          Configuring Docker containers for disaster recovery
      6.  
        Limitations while managing Docker containers
  5. Section V. Reference
    1. Appendix A. Troubleshooting
      1.  
        InfoScale logs for CFS configurations in OpenStack environments
      2.  
        UDID mismatch in a CFS cluster in an OpenStack environment
      3.  
        Troubleshooting virtual machine live migration
      4.  
        The KVMGuest resource may remain in the online state even if storage connectivity to the host is lost
      5.  
        VCS initiates a virtual machine failover if a host on which a virtual machine is running loses network connectivity
    2. Appendix B. Sample configurations
      1. Sample configuration for a KVM environment
        1.  
          Sample configuration 1: Native LVM volumes are used to store the guest image
        2.  
          Sample configuration 2: VxVM volumes are used to store the guest image
        3.  
          Sample configuration 3: CVM-CFS is used to store the guest image
      2.  
        Sample configurations for OpenStack environments
    3. Appendix C. Where to find more information
      1.  
        InfoScale documentation
      2.  
        Linux virtualization documentation
      3.  
        Service and support
      4.  
        About Services and Operations Readiness Tools (SORT)

UDID mismatch in a CFS cluster in an OpenStack environment

You might encounter the following issue with a Cluster File System (CFS) cluster in an OpenStack environment:

# vxdisk list
DEVICE                    TYPE          DISK  GROUP STATUS
openstack-vm10_virtio0_0  auto:cdsdisk  -     -     online udid_mismatch
openstack-vm10_virtio0_2  auto:cdsdisk  -     -     error

In this example, the OS device names /dev/vda and /dev/vdb are used as LUN serial numbers. A non-SCSI ASL is used, and these devices are claimed by libvxvirtio.so.

# vxdisk -p list
DISK                : openstack-vm11_virtio0_0
VID                 : QEMU
UDID                : QEMU%5FVIRTIO%5Fdd0ad256%5F%2Fdev%2Fvdc
SCSI_VERSION        : 0
PID                 : VIRTIO
PHYS_PATH           : virtio-pci-0000:09:00.0
PHYS_CTLR_NAME      : c508
MEDIA_TYPE          : hdd
LUN_TYPE            : std
LUN_SNO_ORDER       : 1
LUN_SERIAL_NO       : /dev/vdc
LIBNAME             : libvxvirtio.so
DMP_DEVICE          : openstack-vm11_virtio0_0
CONN_TYPE           : local
CAB_SERIAL_NO       : dd0ad256
ATYPE               : A/A
ANAME               : VirtIO
TRANSPORT           : SCSI
ENCLOSURE_NAME      : openstack-vm11_virtio0
DMP_SINGLE_PATH     : /dev/vdc
LUN_SIZE            : 209705712
NUM_PATHS           : 1
STATE               : online
HOSTID              : Y_CLS_PRI
DISK_TYPE           : auto
FORMAT              : cdsdisk
DA_INFO             : format=cdsdisk,privoffset=256,pubslice=3,privslice=3
PRIV_OFF            : 256
PRIV_LEN            : 65536
PUB_OFF             : 65792
PUB_LEN             : 209639920
PRIV_UDID           : QEMU%5FVIRTIO%5Fdd0ad256%5F%2Fdev%2Fvdc
DG_NAME             : yash_sdg1
DGID                : 1729076739.17.openstack-vm11
DG_STATE            : imported shared
DISKID              : 1729073915.9.openstack-vm11
DISK_TIMESTAMP      : Wed Oct 16 06:18:35 AM 2024

This error occurs because the OS device name is not unique across the CFS cluster nodes.

Workaround: Boot the VM instance with the virtio-scsi controller, so that all the SCSI disks attached to it use the virtio-scsi driver.

In this example, the disks appear as follows:

sdc          8:32     0  110G  0 disk
├─sdc3       8:35     0  110G  0 part
└─sdc8       8:40     0  110G  0 part

# vxdisk -p  list emc0_2d9a
DISK                : emc0_2d9a
VID                 : EMC
UDID                : EMC%5FSYMMETRIX%5F000297900694%5F9402D9A000
TP_PREF_RCLMCMD     : write_same
TP_RECLM_CMDS       : write_same, unmap
TP_ALLOC_UNIT       : 131072
TP_MAX_REC_SIZE     : 25165824
TP_LUN_SHIFT_OF     : 0
SCSI_VERSION        : 5
SCSI3_VPD_ID        : NAA:60000970000297900694533032443941
REVISION            : 5978
PORT_SERIAL_NO      : 1d-9
PID                 : SYMMETRIX
PHYS_PATH           : pci-0000:0a:00.0-scsi-0:0:0:0
PHYS_CTLR_NAME      : c8
NR_DEVICE           : no
MEDIA_TYPE          : hdd
LUN_TYPE            : std
LUN_SNO_ORDER       : 0
LUN_SERIAL_NO       : 9402D9A000
LOCATION            : 000297900694
LIBNAME             : libvxemc.so
HARDWARE_MIRROR     : no
DMP_DEVICE          : emc0_2d9a
DDL_THIN_DISK       : thinrclm
DDL_DEVICE_ATTR     : tprclm
CAB_SERIAL_NO       : 000297900694
ATYPE               : VMAX-A/A
ARRAY_VOLUME_ID     : 2D9A
ARRAY_PORT_PWWN     :
ARRAY_CTLR_ID       : 1d-000297900694
ANAME               : EMC
TRANSPORT           : SCSI
ENCLOSURE_NAME      : emc0
LUN_SIZE            : 230678032
NUM_PATHS           : 2
STATE               : online
SETTINGS            : thinrclm
HOSTID              : Y_CLS
DISK_TYPE           : auto
FORMAT              : cdsdisk
DA_INFO             : format=cdsdisk,privoffset=256,pubslice=3,privslice=3
PRIV_OFF            : 256
PRIV_LEN            : 65536
PUB_OFF             : 65792
PUB_LEN             : 230612240
PRIV_UDID           : EMC%5FSYMMETRIX%5F000297900694%5F9402D9A000
DG_NAME             : passthrough_shared_dg
DGID                : 1741324852.13.A13
DG_STATE            : imported shared disabled

See InfoScale logs for CFS configurations in OpenStack environments.