Ongoing Virtualization Operations and Maintenance
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Revision as of 20:23, 27 October 2011
When running UC virtualized, the UC application does not follow an appliance model (where management of the underlying hardware is provided through the application).
When running virtualized, be sure to complete the following tasks manually (outside of the application itself).
Multiple versions of ESXi are supported by UC applications.
To upgrade the ESXi software on a host, you must power off all virtual machines or migrate the virtual machine to a different host.
Instructions for installing or upgrading to a specific ESXi release are available in the release notes of the ESXi version you install. For example, here are the VMware ESX 4.1 Update 1 Release Notes.
After upgrading ESXi, or whever moving a virtual machine to a different host that is running a different version of ESXi, VMware Tools must be upgraded on the UC applications so that the tools versions shows "Up to Date" in the vSphere Client (see VMware Tools).
Upgrading the UC applications
When running UC virtualized, it is necessary that the virtual machine configuration be set properly for the specific release of the UC application that you are running.
When doing a fresh install, it is required to deploy the OVA for the application that matches the release of the UC application itself. This ensures that the fresh install has the proper virtual machine configuration for the release being installed.
When a UC application is upgraded (eg. upgrading CUCM from 8.5.1 to 8.6.2), it is necessary to go to www.cisco.com and look at the Readme file for the OVA of the release you are upgrading to. For example: go to www.cisco.com and go to Support -> Downloads. From there Products -> Voice and Unified Communications -> IP Telephony -> Call Control -> Cisco Unified Communications Manager (CallManager) -> Cisco Unified Communications Manager Version 8.6 -> Unified Communications Manager Virtual Machine Templates-8.6(1)
When you're at the appropriate OVA, select "Download Now" and you will be taken to a page where you can click to view the Readme file. In the Readme file, you will see the virtual machine settings for the release. You must edit settings on the virtual machine you have upgraded to match the setting in the Readme file.
You will need to make the changes (edit settings) while the virtual machine is powered off. After you are booted up on the new software version, you must gracefully shut down the virtual machine, change the settings, and boot it back up.
There may be cases where there are no required changes. It will depend on the specific "from" and "to" versions of the upgrade.
Monitor Your Hardware Health
When deployed in a virtualized environment, the UC applications do not monitor the hardware. Hardware must be monitored independently from the UC applications. There are multiple ways to do this:
- Out-of-Band Hardware Monitoring
- In-Band Hardware Monitoring
Each method is explained in this page.
Out-of-Band Hardware Monitoring
Out-of-Band Hardware Monitoring uses Intelligent Platform Management Interface (IPMI) to communicate with the Baseboard Management Controller (BMC). Common IPMI interfaces are HP Integrated Lights Out (iLO) and Cisco Integrated Management Controller (CIMC). IPMI allows the user to to inspect system sensors, power cycle the chassis, obtain remote console and manipulate virtual media. UCS C-series hardware provide IPMI over LAN for use by tools such as ipmitool.
CIMC provides GUI and CLI interfaces to hardware sensors and other status. This information is available via ipmitool using IPMI over LAN. The login screen of CIMC shows hardware status:
See the selections for hardware sensors and inventory in the following image:
IPMI over LAN (ipmitool, ipmiutil)
ipmiutil connects to the CIMC over LAN UDP port 623 (ASF remote management). There are a huge number of options to this command; some of which can be used to set up Platform Event Filtering (pef) and alerting. We have not set up alerting from ipmitool.
Commands to dump the event log and sensor data:
export IPMI_PASSWORD=<password> ipmitool -E -H <iLO, CIMC or IMM IP address> -U <userid> sel list ipmitool -E -H <iLO, CIMC or IMM IP address> -U <userid> sensor list
ipmitool sel list dumps the system event log and can generate thousands of lines of output. Here is a small sample:
6a8 | Pre-Init Time-stamp | Processor #0x20 | Predictive Failure Deasserted 6a9 | Pre-Init Time-stamp | Power Supply #0x60 | Presence detected | Asserted 6aa | Pre-Init Time-stamp | Power Supply #0x61 | Presence detected | Asserted 6ab | Pre-Init Time-stamp | Power Supply #0x61 | Power Supply AC lost | Asserted 6ac | Pre-Init Time-stamp | Entity Presence #0xb3 | Device Present 6ad | Pre-Init Time-stamp | Entity Presence #0x66 | Device Present 6ae | Pre-Init Time-stamp | Platform Alert #0x59 | 6af | Pre-Init Time-stamp | Platform Alert #0xb0 | 6b0 | Pre-Init Time-stamp | Entity Presence #0x64 | Device Absent 6b1 | Pre-Init Time-stamp | Entity Presence #0x65 | Device Absent 6b2 | Pre-Init Time-stamp | Entity Presence #0x67 | Device Absent
ipmitool sensor list generates lots of output; here is a sample:
PSU1_VOUT | 12.000 | Volts | ok | na | na | na | na | 13.000 | 15.000 PSU1_IOUT | 13.000 | Amps | ok | na | na | na | 53.000 | 58.000 | 60.000 PSU1_TEMP_1 | 40.000 | degrees C | ok | na | na | na | 60.000 | 65.000 | 70.000 PSU1_FAN_1 | 2944.000 | RPM | ok | na | na | na | na | na | na PSU1_POUT | 164.000 | Watts | ok | na | na | na | 652.000 | 680.000 | 700.000 PSU1_PIN | 184.000 | Watts | ok | na | na | na | 652.000 | 680.000 | 700.000 PSU2_VOUT | 0.000 | Volts | ok | na | na | na | na | 13.000 | 15.000 PSU2_IOUT | 0.000 | Amps | ok | na | na | na | 53.000 | 58.000 | 60.000 PSU2_TEMP_1 | 31.000 | degrees C | ok | na | na | na | 60.000 | 65.000 | 70.000 PSU2_FAN_1 | 0.000 | RPM | ok | na | na | na | na | na | na PSU2_POUT | 0.000 | Watts | ok | na | na | na | 652.000 | 680.000 | 700.000 PSU2_PIN | 0.000 | Watts | ok | na | na | na | 652.000 | 680.000 | 700.000
In-Band Hardware Monitoring
In-Band hardware monitoring talks to an agent or provider on the host operating system via the Common Information Model (CIM). CIM defines standard XML definitions of computer equipment, including RAM, CPU and peripherals such as disks, RAID controllers, and other options.
CIM data is monitored by:
- Third-party tools like IBM Director
- Linux tools such as wbemcli
ESXi is a closed platform. The following network ports are provided:
- TCP 22 (ssh) Same as "unsupported" login, only if enabled
- TCP 80 (http)
- TCP 443 (vSphere, VMware API)
- TCP 902 (older VMware API)
- UDP 427 (SLP)
- TCP 5989 (WBEM)
vShpere Client, when logged directly into an ESXi host, provides a Health and Status selection under the Configuration tab, from vCenter, this information is available from the Hardware tab when you've selected a host in the Hosts and Clusters view. Health and Status gives an overview of individual physical drives and logical drive groups (RAID arrays). This information is transferred via the following CIM classes in the root/cimv2 namespace:
Information about each physical drive including
Information about the logical volumes (RAID groups), including
- Member drives (<drive number>e<enclosure number>)
- Array state (Optimal, degraded, etc)
Here is an image of the vSphere Client showing sensor data by connecting the viClient directly to the ESXi host.
The VMware API is a set of perl and java libraries and classes that talks SOAP over port 443 to the ESXi host to implement functions used by vSphere Client and virtual Center.
The VMware API is available from vmware.com and comes with the vSphere Manager Assistant (vMA). The vMA OVF can be deployed from http://download3.vmware.com/software/vma/vMA-ovf-4.0.0-161993.ovf and installed in a virtual machine.
Everything that can be done from vSphere Client can be done from perl scripts using the VMware Perl SDK, including virtual machine creation, configuration and management, performance statistics collection, virtual switch administration and virtual host administration.
Here is a simple VM query:
[root@bldr-vcm9 apps]# export VI_PASSWORD=cisco123 [root@bldr-vcm9 apps]# export VI_USERNAME=root [root@bldr-vcm9 apps]# vm/vminfo.pl --server bldr-vh29 --vmname sjc-rfd-pub-1 Information of Virtual Machine sjc-rfd-pub-1 Name: sjc-rfd-pub-1 No. of CPU(s): 2 Memory Size: 6144 Virtual Disks: 2 Template: 0 vmPathName: [vh29_RAID5_8] sjc-rfd-pub-1/sjc-rfd-pub-1.vmx Guest OS: Red Hat Enterprise Linux 4 (32-bit) guestId: rhel4Guest Host name: sjc-rfd-pub-1 IP Address: 10.9.10.4 VMware Tools: VMware Tools is running, but the version is not current Cpu usage: 243 MHz Host memory usage: 6202 MB Guest memory usage: 552 MB Overall Status: The entity is OK
Here's a command to display network counters:
performance/viperformance.pl --url https://bldr-vh29/sdk/vimService --username root --password cisco123 --host bldr-vh29.cisco.com --countertype net
CIM, WBEM and SMASH
WBEM and SMASH use SLP discovery to locate manageable hosts.
Web Enterprise Management and Common Information Model; WBEM and CIM
slptool findattrs service:wbem:https://10.94.150.229:5989
returns nothing, and bldr-vh29 is not discoverable by LSI MSM. That's because slptool is using SLP and multicasts to svrloc are not answered by 10.94.150.229.
11:11:03.967177 IP bldr-ccm39.cisco.com.32829 > 18.104.22.168.svrloc: UDP, length 56
slptool findattrs service:wbem:https://10.94.150.228:5989
returns among other things the different namespaces, in bold, below, that can be queried with wbemcli:
(template-type=wbem),(template-version=1.0),(template-description=This template describes the attributes used for advertising WBEM Servers.),(template-url-syntax=https://10.94.150.228:5989),(service-hi-name=Small Footprint CIM Broker 1.3.0),(service-hi-description=Small Footprint CIM Broker 1.3.0),(service-id=sfcb:10.94.150.228),(CommunicationMechanism=CIM-XML),(InteropSchemaNamespace=root/interop),(ProtocolVersion=1.0),(FunctionalProfilesSupported=Basic Read,Association Traversal),(FunctionalProfileDescriptions=Basic Read,Association Traversal),(MultipleOperationsSupported=true),(AuthenticationMechanismsSupported=Basic),(Namespace=qlogic/cimv2,root/interop,root/interop,root/cimv2,root/config,elxhbacmpi/cimv2,lsi/lsimr12,qlogic/cimv2,vmware/esxv2),(Classinfo=1,1,0,0,0,0,0,0,0),(RegisteredProfilesSupported=ANSI:Host Hardware RAID Controller:Block Services,ANSI:Host Hardware RAID Controller:DA Target Ports,ANSI:Host Hardware RAID Controller:Disk Drive Lite,ANSI:Host Hardware RAID Controller:Drive Sparing,ANSI:Host Hardware RAID Controller:Extent Composition,ANSI:Host Hardware RAID Controller:Fan,ANSI:Host Hardware RAID Controller:Generic Initiator Ports,ANSI:Host Hardware RAID Controller:Indications,ANSI:Host Hardware RAID Controller:Job Control,ANSI:Host Hardware RAID Controller:Physical Asset,ANSI:Host Hardware RAID Controller:Physical Package,ANSI:Host Hardware RAID Controller:Power Supply,ANSI:Host Hardware RAID Controller:SAS/SATA Initiator Ports,ANSI:Host Hardware RAID Controller:Software Identity,ANSI:Host Hardware RAID Controller:Software Update,ANSI:Host Hardware RAID Controller:Storage Enclosure,ANSI:Host Hardware RAID,Other:LSI Support:StoreLib Cmd,DMTF:RAID Controller Alarm,ANSI:Server,SNIA:FC HBA,SNIA:Server,SNIA:HDR,DMTF:Software Inventory,Other:IPMI OEM Extension,DMTF:Sensors,DMTF:Profile Registration,DMTF:System Memory,DMTF:Record Log,DMTF:CPU,DMTF:Fan,DMTF:Base Server,DMTF:Battery,DMTF:Physical Asset,DMTF:Power Supply,DMTF:Power State Management,SNIA:FC Initiator Ports,SNIA:Indication)
For some reason 10.94.150.228 is responding to the multicast:
tcpdump port 427 on bldr-ccm142, running on bldr-vh29, does not see the multicast traffic.
tcpdump port 427 on bldr-ccm144, running on bldr-vh29, does see the multicast traffic:
03:18:37.236162 IP 10.94.150.39.32830 > 22.214.171.124.svrloc: UDP, length 56 03:18:37.985780 IP 10.94.150.39.32830 > 126.96.36.199.svrloc: UDP, length 56 03:18:38.985759 IP 10.94.150.39.32830 > 188.8.131.52.svrloc: UDP, length 72 03:18:43.986543 IP 10.94.150.39.32830 > 184.108.40.206.svrloc: UDP, length 85 03:18:44.986499 IP 10.94.150.39.32830 > 220.127.116.11.svrloc: UDP, length 85 03:18:54.003788 IP 10.94.150.39.32830 > 18.104.22.168.svrloc: UDP, length 56 03:18:54.753108 IP 10.94.150.39.32830 > 22.214.171.124.svrloc: UDP, length 56 03:18:55.753082 IP 10.94.150.39.32830 > 126.96.36.199.svrloc: UDP, length 72 03:18:56.503037 IP 10.94.150.39.32830 > 188.8.131.52.svrloc: UDP, length 72 03:18:57.502985 IP 10.94.150.39.32830 > 184.108.40.206.svrloc: UDP, length 72
Perhaps the multicast group registrations via IGMP aren't being seen or processed by our lab switches, and the multicast traffic isn't routed to the management LAN of some of these ESXi hosts. At any rate, SLP discovery has been unreliable to ESXi hosts, at least in our lab.
wbemcli is a command line interface to CIM servers. This command is able to dump information about
The LSI CIM namespace is lsi/lsimr12. This command enumerates all classes in that namespace:
wbemcli ecn -nl -noverify 'https://root:<password>@<machine IP>:5989/<namespace>'
<namespace> can be root/cimv2, root/interop or any of the namespaces returned by slptool, above.
This command sees a drive in that is being rebuilt and probably uses the same namespace and class that Virtual Center uses:
wbemcli ei -noverify 'https://root:<password>@<ESXi Host IP>:5989/root/cimv2:VMware_HHRCDiskDrive'
This command is able to dump storage volumes (RAID arrays) and tell whether they are OPTIMAL or DEGRADED:
wbemcli ei -noverify 'https://root:<password>@<ESXi Host IP>:5989/root/cimv2:VMware_HHRCStorageVolume'
We can query the state of the RAID controller's write cache battery backup via:
wbemcli ei -noverify 'https://root:<password>@<ESXi Host IP>:5989/root/cimv2:VMware_HHRCBattery'
We can provision a host's IP address directly in IBM director and so don't rely on SLP. We are able to monitor drive removal events in director:
- Click on System Discovery under Discovery Manager on the Welcome to IBM Director start page.
- Enter the host's IP address and click the Discover button
The resulting discovery process takes about 1/2 hour to complete. There are certainly faster ways to do this but this works. Once the system is discovered:
- Click on Navigate Resources located on the left.
- Click on All Systems.
- Click on this host's entry under the Access column and request access.
Once granted access, collect the inventory of this host's hardware:
- Click on this hosts in the table.
- Click on the Collect Inventory button.
- Select Run Now (default) and run the job.
Individual drives, DIMMS, sensors and such will be displayed under the inventory for this host, after inventory collection has completed. This typically takes a minute or two.
The host's Event Log is also visible from this window, under the Event Log tab.
- Open on System Status and Health on the left hand side of Director.
- Click on Event Log.
Events for all machines come to this log. Events for a particular machine can be viewed by:
- Click on Navigate Resources.
- Click on All Systems.
- Click on the host's Operating System entry (not the Server entry, which has an empty Event Log).
- Click on the Event Log tab.
We pulled drives on two machines, bldr-vh27 and bldr-vh28, to generate events.
This is the event log for bldr-vh27 after pulling a drive:
We did the following to rebuild the RAID arrays on these 2 machines:
- Reboot and hit CTRL-Y to enter the Preboot CLI
- Reinsert the drive and mark it ready for removal
-pdinfo -physdrv [252:5] -a0 (verify the drive was missing and reinsert it)
-pdmakegood -physdrv [252:5] -a0 (mark the drive good) -pdprprmv -physdrv [252:5] -a0 (prepare the drive for removal) -pdlocate -start [252:5] -a0 (turn on the locator LED)
- Remove and reinsert the drive
- The RAID array will be rebuilt.
During rebuild, we see many rebuild progress events in syslog (event code 0x0067):
May 20 13:26:18 vmkernel: 0:00:22:48.165 cpu5:4101)<6>megasas_service_aen: aen received May 20 13:26:18 vmkernel: 0:00:22:48.165 cpu0:4337)<6>megasas_hotplug_work: event code 0x0067 May 20 13:26:18 vmkernel: 0:00:22:48.175 cpu0:4337)<6>megasas_hotplug_work: aen registered
Then we see the final syslog entries indicating rebuild is complete and the RAID array is OPTIMAL (event code 0x00f9):
May 20 13:26:21 vmkernel: 0:00:22:50.694 cpu5:4101)<6>megasas_service_aen: aen received May 20 13:26:21 vmkernel: 0:00:22:50.694 cpu14:4328)<6>megasas_hotplug_work: event code 0x00f9
While the RAID array is being rebuilt we see the following events in the Event Log:
LSI MegaRAID Storage Manager (MSM)
The LSI MSM Release 3.6 (downloaded as 2.91) is able to monitor, configure and repair RAID arrays while ESXi is active. This LSI MSM depends on SLP via multicast to find servers. Multicast to an ESXi host appears to be unreliable, and server discovery of ESXi hosts suffers as a result. This Release of MSM does not support alerting on specified events.
LSI MSM 6.9 does appear to support email alerting. However it still depends on SLP discovery and so must be installed on a VM that shares vSwitch0 with its ESXi host. Once the server is discovered:
- LSI MSM opens wbem-https port (5989) to ESXi host
- ESXi host provides CIM indications to LSI MSM over wbem-exp-https port (5990)
- LSI MSM allows configuration and rebuilding of RAID arrays in place without any ESXi outage.
- LSI MSM provides real time display of drive rebuild and completion events
- LSI MSM does not yet provide alerting via email or other actions.
Here is a screen shot of LSI MSM showing the logical drives:
Direct inspection of ESXi syslog requires you log into the CIMC KVM console:
- Press ALT-F1
- Enter unsupported followed by the root password
- vi /var/log/messages
It is possible to enable remote syslog in ESXi by specifying the host name or IP address of a syslog server under the Configuration tab and Advanced Settings. We used our CUCM publisher and it worked fine.
The following syslog messages are generated for RAID drive rebuild progress indication:
May 20 13:04:06 vmkernel: 0:00:00:36.227 cpu0:4115)<6>megasas_service_aen: aen received May 20 13:04:06 vmkernel: 0:00:00:36.227 cpu14:4335)<6>megasas_hotplug_work: event code 0x0067
These syslog messages indicate the rebuild is complete:
May 20 13:26:19 vmkernel: 0:00:22:49.412 cpu5:4101)<6>megasas_service_aen: aen received May 20 13:26:19 vmkernel: 0:00:22:49.412 cpu8:4330)<6>megasas_hotplug_work: event code 0x0063 May 20 13:26:20 vmkernel: 0:00:22:49.643 cpu8:4330)<6>megasas_hotplug_work: aen registered May 20 13:26:20 vmkernel: 0:00:22:49.644 cpu5:4101)<6>megasas_service_aen: aen received May 20 13:26:20 vmkernel: 0:00:22:49.644 cpu9:4329)<6>megasas_hotplug_work: event code 0x0064
These syslog messages indicate the RAID array is restored to OPTIMAL state after the rebuild:
May 20 13:26:20 vmkernel: 0:00:22:49.644 cpu12:4331)<6>megasas_hotplug_work: event code 0x0072 May 20 13:26:20 vmkernel: 0:00:22:49.644 cpu12:4331)<6>megasas_hotplug_work: aen registered May 20 13:26:20 vmkernel: 0:00:22:49.644 cpu5:5403)<6>megasas_service_aen: aen received May 20 13:26:20 vmkernel: 0:00:22:49.644 cpu14:4332)<6>megasas_hotplug_work: event code 0x0051 May 20 13:26:21 vmkernel: 0:00:22:50.694 cpu12:4332)<6>megasas_hotplug_work: aen registered May 20 13:26:21 vmkernel: 0:00:22:50.694 cpu5:4101)<6>megasas_service_aen: aen received May 20 13:26:21 vmkernel: 0:00:22:50.694 cpu14:4328)<6>megasas_hotplug_work: event code 0x00f9
Upgrading Firmware on your TRCs
When running virtualized, UC applications do not manage the firmware on the physical server (host).
The customer must manage the firwmare manually. The customer must monitor new releases of firmware published by the hardware vendor and upgrade when necessary based upon the recommendations of the hardware vendor and VMware.
For deployments on Cisco UC hardware, instructions for upgrading the firmware are available in the Release Notes for each version of posted firmware. It is important to understand that the upgrade procedure may vary between releases of firmware. For example, see firmware release for the UCS C-series for details on the rackmount servers.
For installation and configuration information on UCS servers, refer to the documentation roadmap for either the B-Series or C-Series servers:
- Cisco UCS B-Series Servers Documentation Roadmap
- Cisco UCS C-Series Servers Documentation Roadmap
- Cisco UCS C-Series Integrated Management Controller Documentation
- Cisco UCS Manager Documentation
When deploying on Cisco UCS servers, you can sign up for notifications of new releases at http://www.cisco.com/cisco/support/notifications.html.
Backup, Restore, and Server Recovery
Disaster recovery for Cisco Unified Communications application virtual machines supports the same in-host techniques as Cisco Unified Communications applications on physical servers: the same backup options are available with Cisco Unified Communications running on ESXi as on physical servers.
Other backup, restore techniques available in a virtualizaed environment are currently not supported.
See UC Applications-Specific Virtualization Information for information specific to each UC application.
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