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Storage Networking

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CNIT 34200
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Lab 1 – Storage Networking

This laboratory activity introduces key storage networking concepts. Using an open source SAN/NAS solution you will build a network storage server that provides both block and file level storage across the network. Using virtualization technologies multiple operating systems will be configured to use the network storage. We will use a rolling check-off approach in this laboratory. You may check off progress at any point of a phase’s duration. The final check-off date is the last day on which you may check off objectives for full credit. For Phases I and II partial credit will be available for up to one week after the final phase check off. Please be sure to review the notes section at the end of this document before beginning the lab.

There is adequate time to complete these objectives if you plan and manage your people resources well. However, if you get behind it will quickly snowball. It is highly suggested that you have everything in Phase I other than VM installation completed by Martin Luther King Day.

Objectives Phase I – Three weeks  Implement a NetGear GS108T gigabit switch for management and iSCSI traffic. A sample configuration is shown in figure 1. Port Tagged 802.1q VLAN 1 2 3 4 1 & 101 5 1 & 101 6 7 8 Untagged 802.1q VLAN 1 101 1 PVID (if required) 1 101 1 1 1 1 1 1 Attached Host

1 1 1

Uplink to NET SAN iSCSI Interface SAN Mgmt Interface ESXi 1 ESXi 2 Client 1 Client 2 Client 3

Figure 1 – VLAN Configuration

o IP addresses  VLAN 1 is in the 10.19.lab_station_number.0/24 range  VLAN 101can be any 192.168.x.0/24 o Connect clients and servers to the switch as shown in figure 2.

Internet (Lab Network)

SAN Server FreeNAS Dell Optiplex GX620

VM Server 1 Vmware ESXi Dell Optiplex 990/7010

DMZ VM Server 2 Vmware ESXi Dell Optiplex 990/7010

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VMware viClient Windows 7

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VMware viClient Windows 7

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VMware viClient

Windows 7

Figure 2 – Physical Network Diagram  Implement a FreeNAS SAN server o Hardware  Dell GX620  Second NIC  Second hard drive  USB drive The NIC, hard drive, and USB drive will be provided by your TA







o Software  Install FreeNAS onto the USB stick  Install the latest updates and patches  Configure FreeNAS to use one NIC for management and file sharing (the lab network) and the other for iSCSI o Configure Storage  Create a ZFS striped volume containing both disks  Create a directory in the ZFS volume and expose via NFS Implement two VMware servers o Hardware  Dell 990/7010 o Software  Install VMware ESXi 5.5  Configure VMware networking  Add two kernel port groups: o VLAN 1 – Management Network o VLAN 101 – iSCSI  Add two virtual machine port groups: o VLAN 1 – Virtual machine network o VLAN 101 - iSCSI o Configure storage  Local VMFS datastore (created during installation)  FreeNAS NFS partition mounted as a VMware datastore  The address/name of your NFS export on FreeNAS  rtfm.cit.lcl:/iso mounted as a VMware datastore via NFS  This NFS export contains all of the required client operating system ISO images for installing VMs Implement three management stations o Software  Windows clients  Windows 7  Install VMware viclient on each  Download from http://your_esxi_server_address  Also install host update utility Install operating systems in VMware virtual machines o Spread across VMware servers as desired o Use ISO images on NFS mounted ISO datastore for installation  Mount from rtfm.cit.lcl:iso o Install to local storage  Windows Server 2012  Windows Server 2008  CentOS o Install to NFS mounted FreeNAS datastore  Windows Server 2003  Windows 7

Phase II – two weeks o Configure FreeNAS as an iSCSI target server  Do not use any authentication initially on the iSCSI targets  Configure iSCSI targets on FreeNAS  Create file extents  One extent/iSCSI target per initiator o Connect to an iSCSI target on the SAN from virtual machines installed in phase 0  Implement software iSCSI initiator in both Windows and CentOS  Create a target on FreeNAS for each initiator  Mount an iSCSI partition to each operating system o As a second drive o Initially use SendTargets to find targets o Connect to SAN via iSCSI from VMware ESXi  Create a large iSCSI extent/target  Mount the target on one ESXi and format as a VMFS file system  Mount the same target on the second ESXi  Move existing VM images from local storage to iSCSI VMFS file system o Exploit the capabilities of using VMware with a SAN  Implement a vCenter Server virtual appliance o Add a VM on the iSCSI based datastore to the inventory on both ESXi Servers  Show that it can be easily ran on either server  But not on both concurrently… o Show that a running virtual machine can be moved to another server via vMotion o Add authentication/authorization to iSCSI targets  Limit iSCSI target access to a specific initiator by IP address  Implement CHAP security  One-way CHAP for discovery  Two-way (Mutual) CHAP for targets Phase III – two weeks o Implement network booting via iSCSI  General Information  Network boot clients will be virtual machines o Client machines will PXE boot gPXE iSCSI boot loader via TFTP o Place all VM definitions on NFS share on FreeNAS





Deploy Infrastructure  Use existing local CentOS VM for DHCPD and TFTP daemons  Configure DHCPD for PXE with static reservations per lecture notes  Configure TFTP to serve the gPXE undionly.kpxe boot loader Operating Systems  Install new operating system instances directly to iSCSI target o Windows Server 2012 o Windows Server 2008 o Windows 7 o CENTOS  Move existing operating system instances to iSCSI target and configure for network booting o Existing Windows Server 2003

Notes – Read carefully before beginning Initial Tasks Install a Windows client and configure it to access the Internet to look up documentation. Initial Switch Configuration    The GS108T can be reset to factory defaults by holding down the reset switch on the front of the switch The default IP address is 192.168.0.239/24 The default password is “password”

VLANs and Networking VLANs should be configured as IEEE 802.1Q VLANs with the tag numbers defined in the objectives portion. In VMware the single physical NIC (vmnic) should have a vSwitch associated with it with four ports: a VMkernel port for each VLAN tag configured with an IP address for the ESXi server and a Virtual Machine Port Group for each VLAN tag for use by your guest (client) operating systems. The guest operating systems should connect to the VLAN 1 port group as their primary NIC (with default route and DNS information) and to the iSCSI port group to connect to the iSCSI initiator. FreeNAS Configuration FreeNAS is an appliance. As such, the installation drive is reserved for use by the operating system. Be sure to install it to the USB stick rather than one of the hard drives in the system.

Similar to ESXi, the only configuration done at the FreeNAS console is the management network settings. Once the management network is set-up, all further configuration is done via a web browser. FreeNAS Storage and Partitioning FreeNAS uses ZFS, a next generation storage approach that combines aspects of logical volume management, software RAID, and a traditional filesystem into a single filesystem. Create a single ZFS Volume containing both drives in a striped configuration. ZFS will be discussed further in lecture. VMware iSCSI implementation After adding the software iSCSI Storage Adapter (initiator), use sendtargets (dynamic discovery) to enumerate the targets/extents on the FreeNAS server. Discovered targets will show in the static discovery tab on the iSCSI initiator configuration pane. Once the target has been discovered, it can be mounted via add storage disk/LUN from the configure/storage tab. iSCSI Authentication Do not use CHAP authentication for initial configuration as it makes it difficult to troubleshoot: is it a basic iSCSI problem or a CHAP problem? Once iSCSI functionality is confirmed, add CHAP authentication. CHAP is expected to be implemented at checkoff for full credit. The CHAP usernames should be set to the host’s IQN. Note that when using CHAP, the passwords (shared secrets) must be at least 12 characters long or it not authenticate properly. vCenter Appliance Instructions for implementing the VMware vCenter appliance are available on Blackboard Install and configure DHCP Daemon Install the dhcp package via yum. Note that the CENTOS DHCP package is named dhcp even though the daemon is named dhcpd. Configure the DHCP daemon for PXE per the network booting lecture notes. Install TFTP Daemon Install the tftp-server package via yum. The xinetd package is a dependency of tftp-server and should install automatically if it is not already installed. Configure the tftp-server package per the network booting lecture notes.

Install New Operating System Instance Directly to iSCSI Target iSCSI network booting must be correctly configured before installation. BIOS must be configured to attempt network boot first and operating system installation media second. Refer to the network booting lecture notes for more information. Copy Existing Installs to iSCSI Target Use dd to copy existing boot drive from the .vmdk-flat file on the NFS share to the iSCSI target partition. Be sure to specify the correct block size with the bs= option. The default block size is 512. Refer to lecture notes for further information.

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