Category : vCenter

Zerto: Perform a VPG Move (VM Migration)

In a situation where a workload needs to be migrated from a protected to a recovery (or site A to site B) in an effort to change where the production workload runs from, you can perform a VPG move.

From what I’ve seen, in terms of VPG move versus Failover, is that when using the Failover option, there is an assumption that the protected site has failed, so systems may not automatically be cleaned up on the protected site.  When performing a move, the protected site is cleaned up as soon as that move is completed and committed unless you select to re-protect the workload in the other direction (can be automatic or manual for commit, maximum time you have to do it is 24 hours, and that is configurable).

One recommendation I have here is that before you perform these steps, perform a recovery test on the VPG you’d like to move to ensure that recovery steps are completed as expected, and that the system is usable at least in a testing capacity.

  1. Log in to the Zerto UI
  2. From the dashboard screen, go to Actions > Move VPG.zerto_perform_vpg_move_1_2
  3. Select (tick the checkbox) for the VPG you want to move, and click Next.zerto_perform_vpg_move_1_3
  4. Select your options for the Execution Parameters, and click Next.  For this example, I will select “none” for the commit policy, to demonstrate where to commit the migration task when you are ready to.zerto_perform_vpg_move_1_4
    > Commit Policy: Auto-Commit - you can delay up to 24 hours (specified in minutes), or select 0 
    to automatically commit immediately when the migration process is completed.
    > Commit Policy: Auto-Rollback - You can delay up to 24 hours (specified in minutes), default 
    delay is 10 minutes
    > Commit Policy: None - You must manually select whether or not to commit or rollback, based 
    on your results.
    > Force Shutdown - Use this in the event VMware Tools isn't running, therefore, allowing an 
    automatic shutdown. Force shutdown will first attempt to gracefully shut the VM down, and if that doesn't work, 
    it will power off the VM on the protected site.
    > Reverse Protection - This will automatically sync changes from the recovery site back to the 
    protected site in case you want to be able to re-protect a system after a migration. This eliminates the need 
    to have to re-initialize synchronization in the other direction. If reverse protection is selected, a delta 
    sync will take place to re-protect after the migration is completed. Caveat - You cannot 
    re-protect if you select "NONE" as the commit policy.
    > Boot Order -(Defined in VPG Configuration, but displayed here)
    > Scripts - (Defined in VPG configuration, but displayed here)
    
  5. Review the summary, and when ready, click Start Move.
    During promotion of data, you cannot move a VM to another host.  If the host is rebooted
    during promotion, make sure the VRA on the host is running and communicating with the ZVM before 
    starting up the recovered VMs.

    zerto_perform_vpg_move_1_5

  6. Since we have selected a commit policy of “none”, once the migration is ready for completion, the Zerto UI will alert you letting you know there is a task awaiting input.  Click on the area highlighted below.zerto_perform_vpg_move_1_6_aSelect to either Commit (checkmark), or Rollback (undo Arrow):

    zerto_perform_vpg_move_1_6_b

  7. At this point, you can also choose whether or not to reverse-protect.  Make your selection and click Commit.zerto_perform_vpg_move_1_7_aThe task will update as seen below:zerto_perform_vpg_move_1_7_b

    Once you commit the move, the data in the protected site is then deleted, thus completing the migration.

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Zerto: Deploy Virtual Replication Appliances

If you’ve followed along with Zerto: ZVM Installation, this entry is a continuation, and provides steps to deploying the Zerto Virtual Replication Appliances.

After installation has succeeded, open a browser, and connect to https://ZVMFQDN:9669/zvm.

Notes:

  • If this VM lives in a protected network for management/utility servers, you might need to allow port 9669 from your local network to the network the ZVM lives in.  The Zerto Standalone UI, vCenter Web Client, and vCenter C# client all use port 9669 to access the ZVM.
  • Be sure to use a supported browser.  Chrome, Firefox, and IE 11+ are recommended by Zerto.
  1. Log on using your vCenter credentials.zerto_vra_deploy_1_1
  2. Enter a license key and click Start.

After entering the license key and clicking start, you’re taken to the dashboard, however, before starting to protect VMs, the VRAs will need to be installed on the hosts in the site and pair the protected and recovery sites.

Install the VRAs

The Zerto installation includes the OVF template for VRAs.  A VRA must be installed on every host that manages protected VMs in the protected site, and on every host that will manage VMs in the recovery site.

The VRA compresses data that is passed across the WAN from the protected to recovery site, and automatically adjusts the compression level according to the CPU usage, totally disabling it if required.

A VRA can manage a maximum of 1500 volumes, whether they are protected or not.

VRA Requirements

Each VRA must have:

  • 12.5GB datastore space
  • at least 1GB of reserved memory
  • Each host installed to must be at least ESX/ESXi 4.0 U1 and have ports 22 and 443 enabled for the duration of the installation.

If you are installing to ESXi 5.5 or higher, the VRA should connect to the host with user credentials, otherwise, the password for the host root account is required.  Because of the method used when the VRA connects to the host using a VIB (ESXi 5.5 or higher), it is not necessary to enter the root password.

During VRA deployment, you should have IP addresses reserved, as it is not recommended to use DHCP; so be sure to also have the information for the subnet mask, and default gateway.

If you do not have SSH enabled on your hosts, the ZVM will attempt to enable and disable it during the installation of the VRA.

Important: Do not snapshot a VRA, as it will cause problems with replication!  I actually
forgot to exclude the VRAs from backups, and CommVault attempted to back them up after I had
configured my first VPG, and I ended up having to re-deploy the VRAs.  My advice is to create a
folder for the VRAs in your vCenter folder structure and have that folder excluded from backups
altogether.  Don't forget to move the VRAs into the folder as soon as they're deployed.

Installation

  1. Log in to the Zerto Manager UI
  2. Click on the Setup tab.zerto_vra_deploy_2_2
  3. Locate the host you want to deploy the VRA to, and check the box beside it.  Once you have selected the host, click New VRA.
    Note:  If you select multiple hosts, clicking the New VRA link
    will only install on the first host that you have selected.

    zerto_vra_deploy_2_3

  4. Specify the host, datastore, network, RAM, group, and enter the network details, then click Install.  Repeat the steps for each additional VRA you need to deploy (one per host).
    Note: When you deploy a VRA, Zerto will automatically reserve the amount of
    memory equal to what you specify in the VRA RAM settings.  This amount of RAM is the maximum buffer
    size for the VRA that is used to buffer IOs written by the protected virtual machines before the
    writes are sent over the network to the recovery VRA.  The recovery VRA also buffers incoming IOs
    until they are written to the journal.  If a buffer becomes full, a Bitmap Sync is performed after
    space is freed up in the buffer.
    The protecting VRA can use up to 90% of its buffer for IOs to send to the recovery VRA, which can
    use up to 75% of its buffer before it is full and requires a bitmap sync.

    zerto_vra_deploy_2_4

  5. After all VRA installations are completed, the setup tab will contain more information for each host that has a VRA installed.zerto_vra_deploy_2_5

Once you’ve completed these steps for each host requiring a VRA, you can create Virtual Protection Groups and start protecting your workloads.

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Zerto: ZVM Installation

Here we go!  The following procedure is a step-by-step installation of Zerto Virtual Replication 4.5 U3.  Before starting, you should have built 2 Windows VMs per the Zerto system requirements.  If this is being done in production, be sure to size the servers as needed for the number of VMs you will be protecting.

The version being installed is 4.5 U3.

System Requirements

Note: Be aware of OS limitations when dealing with 32-bit vs 64-bit.  In a 32-bit Windows Server installation, the maximum amount of RAM you can give the system (that it can actually use) is 4GB.  If you’re using Windows Server 2008 R2 or Windows Server 2012, they’re only available in 64-bit, so you won’t need to worry about this limitation.  For more information on Windows memory limitations, please see this.

Now we’ve got that out of the way, here are the system requirements for the Zerto Virtual Manager as of version 4.5 U3:

For the ZVM at Each Site

  • VMware vCenter 4.o U1 or later with at least 1 ESXi host
  • The account you log into the ZVM with and use to run the service will need to have administrative privileges in vCenter.
  • Supported Windows Operating Systems:
    • Windows Server 2003 SP2 or higher
    • Windows Server 2008
    • Windows Server 2008 R2
    • Windows Server 2012
    • Windows Server 2012 R2
  • Resource Reservations in vSphere
    • CPU: Reserve at least 2 vCPUs
    • Memory: Reserve at least 4GB
  • Resource Requirements for ZVMs:
    • Up to 750  protected VMs and up to 5 peer sites:
      • 2 vCPU, 4GB RAM
    • 751-2000 protected VMs and up to 15 peer sites:
      • 4 vCPU, 4GB RAM
    • > 2000 protected VMs and > 15 peer sites:
      • 8 vCPU, 8GB RAM
  • Time/NTP Requirements:
    • Zerto VMs must be synchronized with UTC (you can set actual timezones)
    • It is recommended to use an NTP server for clock synchronization.
  • Microsoft .NET Framework 4 (included with the Zerto installation package)
  • Storage: At least 2GB, plus 1.8GB if you need to install the .NET Framework

For the ZRA on Each Host

One VRA should be installed per host in a participating cluster.  By doing this, you are accounting for any vMotion or DRS activity related to any protected VM in the cluster(s).  ZRAs are deployed from within the Zerto UI, and furthermore, when this is done, DRS affinity rules are automatically created for the ZRAs, and any reservations required are automatically created.

Important:  After deployment of the ZRAs, be sure to add the ZVM and ZRAs into a folder in vCenter that can be excluded from any snapshots.  In otherwords, if you’re using VADP for backups, be sure to exclude this folder, or each ZRA/ZVM from within your backup software.  Failing to do so will cause corruption and you will have to re-deploy the ZRAs.  Furthermore, this will prevent any performance degradation that is a result of snapshot cleanup/consolidation jobs.

ZRAs require the following resources:

  • 12.5GB of datastore space (per ZRA)
  • At least 1GB RAM (reserved automatically through deployment process)
  • ESX/ESXi 4.0 U1 or higher
  • Ports 22 and 443 open on each host during installation of the ZRA (During ZRA deployment, Zerto will also attempt to enable the SSH service on each host, however, if it fails, you will need to manually enable/disable).
  • You’ll need to identify what datastore to install the ZRA to.
  • Static IP Address for each ZRA (recommended to use static)
    • IP Address (f0r each ZRA)
    • Subnet Mask
    • Default Gateway

ZRAs will automatically be named by Zerto during deployment, and clearly indicate what host they are running on.

Network Requirements

  • > 5MB/s is required for Zerto

ZVM Installation

Once you’ve built your Windows VMs to house the ZVM, the steps below will guide you through the installation.  This will need to be done in both sites, although, if you only have 1 site, you can still protect and recover within the same site.  Please note that if you are installing in 2 geographically separated sites, you may need to open some firewall ports before pairing sites and initiating replication.  For firewall requirements, see this document.

  1. Browse to the directory where you have downloaded the installation files to and run the installer (Zerto Virtual Replication VMware Installer).zerto_installation_files
  2. Click Next on the welcome screen.zerto_installation_1_2
  3.  Accept the License Agreement, and click Next.zerto_installation_1_3
  4. Select the installation directory, and click Next.zerto_installation_1_4
  5. Select the installation type, and click Next.zerto_installation_1_5
  6. Select either “Local System Account” or “This Account” if you have a dedicated service account.  Either way you decide to go, the account will require unrestricted access to the local resources on the ZVM.  After you made your selection, click Next.zerto_installation_1_6
  7. In the Database Type dialog box, select your database type, and click Next.Notes:  It is recommended to use an external SQL server when a site has more than 40 hosts that have VMs that need to be protected, and the site has more than 400 VMs that need to be protected.  If you use Windows Authentication for the SQL server (external), then the creadentials in step 6 will be used.zerto_installation_1_7
  8. Enter the name of the vCenter along with the admin credentials that will be used to connect, then click Next.zerto_installation_1_8
  9. Optional: If you have vCloud Director and want to protect it using Zerto Virtual Replication, enter the information necessary to connect to it, and click Next; otherwise, leave the “Enable vCD BC/DR” box unchecked, and click Next.zerto_installation_1_9
  10. Enter the Zerto Virtual Manager settings to identify this installation, and click Next.zerto_installation_1_10
  11. Enter the required information for ZVM communication, and click Next.  The ports listed below are defaults, and if you recover to a site managed by a Cloud Service Provider, be sure you do not change the default ports.zerto_installation_1_11
  12. As soon as you click Next on the screen in the previous step, the installer will auto-validate ZVM communication to ensure the ports to this ZVM are opened, it will verify vCenter credentials that you specified, and will register the vCenter plug-in.If the validation for each item results in “OK”, click Run, otherwise, resolve any errors, and click Recheck.zerto_installation_1_12
  13. If you clicked Run, Zerto Virtual Replication will begin installation and the configuration of components.zerto_installation_1_13
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The Much Anticipated vSphere 6.5!

Well, this just made my day, and I am really looking forward to getting my hands on it – :::Drumroll:::

At VMWorld Barcelona 2016, it has been announced that vSphere 6.5 will be available as early as Q4 2016!

Some key takeaways include:

  • UEFI Support for AutoDeploy
  • vCenter Server Appliance Migration Tool, allowing migration from a Windows to VCSA to become an included feature.
  • REST-based APIs for VM Management
  • HTML5-based vSphere Client (fully supported)
  • VM-level disk encryption
  • Encrypted vMotion
  • Audit-quality Logging
  • vSphere Integrated Containers
  • More!

Get the details here!

 

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Zerto 4.5 POC Design

In addition to VMware Site Recovery Manager testing, I’ve also built a 2-site Zerto proof-of-concept environment in the sandbox, which actually spans two geographically separated sites for a real-world test, minus the production workloads.

I have just concluded SRM with vSphere Replication testing, and we’ve decided to trash the array-based replication option, due to cost, complexity, dependencies, etc, etc… and favor vSphere Replication for an apples-to-apples test agains Zerto Virtual Replication.  Besides, after spending a couple of weeks with our SAN engineers troubleshooting Array-based replication to no avail (in addition to all considerations listed above), we felt it would be way too expensive to have the same storage in each site we’d like to protect or recover to and we’d also have to re-architect how we design datastores for vSphere.  Hypervisor replication is much more agnostic, and furthermore, so is Zerto.

I will write up a comparison on SRM and Zerto as soon as my documentation catches up with me for anyone interested in a side-by-side comparison.

Anyhow, just as I did with SRM, here is a topology diagram of how I have deployed Zerto in the sandbox environment.  How-to’s and overall comparison/issue tracking/notes will follow.  Firewall ports between all entities are also included, however, I did not include system specs for any of the infrastructure seen below.  I also did not include any of the Zerto Backup or Zerto Cloud Manager functionality, as this was not a requirement for the testing.  I will include system requirements in a later entry.

You can download a copy of this diagram as a PDF.

Note: This can also be replicated if you have a single physical ESXi host to build virtual ESXi hosts and infrastructure beneath it.  There are a number of resources on the web that will show you how to build a nested ESXi lab, this is just one of them, but it is detailed, and easy to follow along with, and has lots of pictures.  In order to duplicate this though in a single host with nested ESXi and vCenter, you will need to be conscious of resource requirements.

zertovr_45u3_poc_design

 

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Zerto Virtual Replication 4.5

In addition to VMware Site Recovery Manager evaluation, I’ve also been asked to perform a side-by-side comparison with Zerto Virtual Replication, and provide an outcome report to help leadership make an informed decision on which product will best meet our BCDR requirements.

In addition to our current use case for BCDR, we’ve recently acquired another business, who already has Zerto licenses; so, I’ll also be evaluating Zerto’s capability to migrate virtual workloads between sites.

IMHO for something like a migration project where we’re not shutting down a data center, Zerto would work great due to the fact that it is simple, and the software is very agnostic in terms of versioning. Even moreso,  it can protect and recover in two completely different virtualization environments, namely VMware vSphere versus Microsoft Hyper-V (cloud too).

I’m already expecting the laundry list of “tasks” with Zerto to be extremely short, and since I’ve worked with Zerto in my previous role as a PS Engineer for a local consulting firm, I know it works and it will blow their minds.

mindblown

 

 

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SRM 6.1 POC Update – Post Failed PSC Remediation

Just an update here to show that after resolving that PSC synchronization issue in our environment, I am now able to successfully pair the two SRM sites in our POC.

Since I have replaced the failed PSC with a new one (new name/IP), and the SRM server was initially connected to the old PSC, I had to first modify the SRM installation and update the PSC it was pointed at. Once I did that, site pairing was successful, and all those SSL and user/password errors I was getting went away.

srm_poc_update_post_pscfix

So, my advice if you run into the same issues as I did – is not to count other systems in the environment out, otherwise, you may be thrown for a loop and support would be no help.

If we hadn’t discovered that synchronization issue between external PSCs, this would have likely been an ongoing issue and it would have seemed like there was no light at the end of the tunnel.

For a recap of the issues seen with site pairing due to the PSC synchronization being broken, see this blog entry.

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Replace a Failed External PSC in Enhanced Linked Mode: Part 2

In Part 1 of “Replace a Failed External PSC in Enhanced Linked Mode”, I worked through repointing a Windows vCenter Server to another External PSC, in an effort to unregister, and rebuild a failed PSC.

In this guide, I will walk through:

  • Building a new Windows external PSC
  • Joining the SSO Domain
  • Re-pointing VC1 back to this newly-built, and linked external PSC, therefore, returning us to the original topology we started with (except for the server name)

The main systems I’ll be working with in this guide are:

  • VC1 (Windows vCenter that was re-pointed to working PSC for other site while we rebuild it’s home PSC)
  • PSC3 – This is a newly built Windows Server 2012 R2 PSC that is taking the place of PSC1.

I would have chosen to use the same name of the original PSC, but from experience, it’s always better to be safe, and not try to re-introduce a problematic record into the environment, just in case there are still entries hanging out somewhere in the working configuration.

At the end of this guide, we will end up with this topology:

replace_psc_part2_topology_1

 

Install the External PSC Role on the New Server


Note: 
These steps are the same ones to deploy the second PSC in “Deploying Windows vCenter with External PSCs in Enhanced Linked Mode: Part 2.”

  1. Launch the vCenter Server Installer
  2. Select vCenter Server for Windows, and click Install.
  3. Click Next on the welcome screen.
  4. Accept the EULA, click Next.
  5. Under External Deployment, select Platform Services Controller, and click Next.replace_psc_part2_1_5
  6. Verify the system name (This should be the same FQDN of the PSC you are building to replace the failed one), and click Next.
  7. Select Join a vCenter Single Sign-On domain.
  8. Enter the FQDN for the first Platform Services Controller that owns the SSO domain you want to join.
  9. Enter the vCenter Single Sign-On password, then click Next.replace_psc_part2_1_9
  10. When prompted for Certificate Validation, click OK to accept the self-signed certificate.
  11. Select Join an existing site, choose the site from the dropdown menu(should match the site name of the first PSC you created), and click Next.replace_psc_part2_1_11
  12. On the Configure Ports page, make any changes necessary for your environment, and click Next.
  13. Set the PSC installation and data directories, and click Next.
  14. Select whether or not to join the Customer Experience Improvement Program (CEIP), and click Next.
  15. Verify the installation summary settings, and if all looks well, click Install.
  16. Once the installation has completed, log into the vSphere Web Client, and navigate to Home > Administration > Deployment > System Configuration.  Under the Nodes object, verify that there are now 4 nodes (you should see 2 PSCs, and 2 vCenter servers).

 

Next Steps:

After verifying functionality of the newly added PSC, the next step is to re-point VC1 (repointed previously to PSC2) to the new PSC (PSC3).

replace_psc_part2_2_main

Repoint the Connections Between vCenter Server and Platform Services Controller:
 
  1. Log onto the vCenter Server instance (VC1).
  2. In the command prompt (run as administrator), navigate to C:\Program Files\VMware\vCenter Server\bin (or wherever you have vCenter installed to).
  3. Run the cmsso-util script:
    cmsso-util repoint --repoint-psc psc_fqdn_or_static_ip [--dc-port port_number]

    psc_fqdn_or_static_ip – is the FQDN or static IP address of the PSC you want to repoint to.

    replace_psc_part2_3_3

  4. Log into the vCenter Server instance by using the vSphere Web Client to verify that the vCenter server is running and can be managed.
  5. Finally, to see what PSC each vCenter is connected to:
    1. Log into the vSphere Web Client, and navigate to Hosts and Clusters View.
    2. Select a vCenter, and go to the Manage Tab.
    3. In Settings, go to Advanced Settings.
    4. Search for the config.vpxd.sso.admin.uri
    5. When the result is returned, look at the Value field, and this will tell you what PSC the particular vCenter is connected to.replace_psc_part2_3_5

 

This completes the series for Replacing a Failed External PSC in Enhanced Linked Mode. If you find that this has helped you, please feel free to share the information. It took me quite a while to gather all the information needed, and build the environment for this, so I really hope it helps.

In my research when first encountering the issues with my failed PSC, I found that there are a lot of other bloggers out there who have written something about the issues, troubleshooting steps, and fixes related to a failed PSC. While this is not a “one fix to rule them all” solution, it is a very clean way to replace a failed PSC. I apologize for not documenting the same thing for the VCSA, however, if you follow the steps in the order I provided, the links I have in my posts also have the proper steps to execute for the VCSA.

 

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Replace a Failed External PSC in Enhanced Linked Mode: Part 1

If you’ve followed along starting with the 2-part series about “Deploying Windows vCenter with External PSCs in Enhanced Linked Mode…”, this is the next installment, in which we will go through replacing a failed external PSC using that same topology.

If you haven’t followed along, then the following links will help set the stage for what we’re doing here:

The reasons I’m performing these steps, or even trying it, are:
  • I have never performed this procedure before.
  • I would like to know how to do this and be able to help others out by sharing my experience and the information.
  • I would like to understand the requirements and general order of operations for performing the procedure.
  • I would like to address a current production issue without experimenting in production, and therefore causing further complications or a causing a complete loss of manageability of my environment.

 

The Workflow

replace_psc_part1_topology

 

Lab Testing

 

So to prepare for this in the lab, I’ve created a datacenter in each vCenter, assigned some permissions to both of them (AD-integrated permissions), and licensed both vCenters (licenses to be removed following the testing).  This was done to ensure that replication was succeeding between the two PSCs.  I also ran the vdcrepadmin.exe utility on both PSCs to ensure replication is succeeding, and there are no outstanding changes or replication problems.

From PSC1:

.\vdcrepadmin.exe -f showpartnerstatus -h localhost -u administrator -w [password]

replace_psc_part1_lab_1_1
From PSC2:
.\vdcrepadmin.exe -f showpartnerstatus -h localhost -u administrator -w [password]
replace_psc_part1_lab_1_2
The next step for me to do is shutdown PSC1 to simulate a failure.  Once shut down, re-point the vCenter affected by this failure to the working PSC:
replace_psc_part1_lab_1_3

If I run the following on PSC2, it will show that PSC1 is now offline:

.\vdcrepadmin -f showpartnerstatus -h localhost -u administrator -w [password]

If I run the following on PSC2, it still shows that there are two PSCs registered:

.\vdcrepadmin -f showservers -h localhost -u administrator -w [password]

replace_psc_part1_lab_1_4

Re-point the Connections Between vCenter Server and Platform Services Controller

  1. Log onto the vCenter Server instance (VC that is still connected to the failed PSC).
  2. In the command prompt (run as administrator), navigate to C:\Program Files\VMware\vCenter Server\bin (or wherever you have vCenter installed to).
  3. Run the cmsso-util script to repoint the connection of this vCenter to the PSC that is still alive:
    cmsso-util repoint --repoint-psc psc_fqdn_or_static_ip

    (Running the command above may take some time to complete. In my test lab, it took approximately 13 minutes to complete)

    replace_psc_part1_lab_3_3

    Part of the repointing task includes stopping and starting all vCenter related services on the server.  Give the web server additional time to fully initialize before moving on with the next step.

  4. Log into the vCenter Server instance by using the vSphere Web Client to verify that the vCenter server is running and can be managed.After the web server completed its initialization for VC1, I was able to log in successfully, and verify the inventory, permissions, and licensing.  The next step is to Unregister the bad PSC (PSC1) from the configuration on PSC2.

 

Unregister the Failed PSC

 

  1. On the PSC (live one that you just repointed to), open a command prompt (run as administrator).
  2. Browse to C:\ProgramData\VMware\vCenterServer\cfg\install-defaults.
  3. On the failed PSC: Open the vmdir.ldu-guid file to find the hostid.
  4. On the working PSC: Navigate to C:\Program Files\VMware\vCenter Server\bin
  5. On the working PSC: Run the cmsso-util unregister command to unregister the stopped/failed Platform Services Controller:

    cmsso-util unregister --hostId host_Id --node-pnid Platform_Services_Controller_System_Name --username administrator@vsphere.local --passwd [password]

    replace_psc_part1_lab_4_5

    After this has been run successfully, verify that the OLD PSC has been removed from the topology.

  6. n the vSphere Web Client, navigate to Home > Administration > Deployment > System Configuration.  Under the Nodes object, verify that there are only 3 nodes (you should see 1 PSC, and 2 vCenter servers).
  7. On PSC2, run

    .\vdcrepadmin -f showservers -h localhost -u administrator -w ************

    replace_psc_part1_lab_4_7

    You should now only see one server in the listing, as opposed to 2, since you just removed the failed PSC.

  8. Delete the failed PSC (VM) you no longer need from the vSphere inventory.

 

There you have it.  We have successfully re-pointed a vCenter to another PSC, unregistered the bad PSC, and validated that we are now ready to rebuild in order to re-instate the original topology.  The next part to this series will cover building the replacement PSC, joining the SSO domain, and finally, repointing the vCenter at this new PSC, therefore returning the topology to where it was before we started.

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Deploying Windows vCenter with External PSCs in Enhanced Linked Mode: Part 2

Before following any steps in here, be sure to refer to the previous part to this series, which will provide some background information and walk through the steps to install the first PSC and vCenter servers.  The steps contained in this post will be a continuation, marking the differences between the initial install (previous post), and the additional PSC and vCenter server.
In this post, I will be walking through joining the second PSC to the SSO domain created previously.  Following that, if there are any steps different for the subsequent vCenter Server installation, I will call out any steps in this installation that differ from the first install and include screenshots.
For any pre-requisites, head to Part 1 of this series.

 

Install the Second Platform Services Controller on a Windows Machine and Joining the SSO Domain

If deploying in a production environment, refer to the vSphere Installation and Setup for vSphere 6.0 Guide.

    1. Launch the vCenter Server Installer
    2. Select vCenter Server for Windows, and click Install.
    3. Click Next on the welcome screen.
    4. Accept the EULA, click Next.
    5. Under External Deployment, select Platform Services Controller, and click Next.external_psc_part2_1_5
    6. Verify the system name (recommended you use FQDN, not IP Address), and click Next.
    7. Select Join a vCenter Single Sign-On domain.
    8. Enter the FQDN for the first Platform Services Controller that owns the SSO domain you want to join.
    9. Enter the vCenter Single Sign-On password, then click Next.external_psc_part2_1_9
    10. When prompted for Certificate Validation, click OK to accept the self-signed certificate.
    11. Select Join an existing site, choose the site from the drop-down menu (should match the site name of the first PSC you created), and click Next.external_psc_part2_1_11
    12. On the Configure Ports page, make any changes necessary for your environment, and click Next.
    13. Set the PSC installation and data directories, and click Next.
    14. Select whether or not to join the Customer Experience Improvement Program (CEIP), and click Next.
    15. Verify the installation summary settings, and if all looks well, click Install.

Next Steps

 
Once completed, run the installer on the vCenter Server that will connect to this PSC, and be sure to connect it to THIS PSC, NOT THE FIRST PSC that was built.

external_psc_part2_1_ns_1

Install vCenter Server and the vCenter Server Components, Connecting to the Second PSC

Perform these steps, making sure to connect this vCenter to the PSC that was just installed above, not the first PSC from Part 1.
Installation
 
  1. Launch the vCenter installer and select vCenter Server for Windows. Click Install.
  2. Once the installer initializes, click Next.
  3. Accept the VMware End User License Agreement, and click Next.
  4. Under External Deployment, select vCenter Server and click Next.
  5. Enter the system’s FQDN, and click Next.
  6. Enter the information for the external PSC that was deployed in the section above, and click Next.  This step will register the vCenter with the PSC.
  7. When prompted for certificate validation, click OK to approve the self-signed certificate created by the PSC.
  8. Configure the vCenter service account according to your environment requirements and click Next.  If you are using an external database server, you will need to specify a user service account.

    Note: 
    If you are using a user service account, you will need to make sure it has the “log on as a service” privilege in the local security policy.

  9. Select your database deployment and enter information if necessary, then click Next.
  10. Configure the required ports if necessary to match your environment, and click Next.
  11. Configure the installation directory for the vCenter Server and data, then click Next.
  12. Review all settings, and when ready, click Install.
Next Steps
 
After you’ve completed this setup, you should now have a functional topology, with 2 vCenters each connected to an external platform services controller.  The two external PSCs should now also be running in enhanced linked mode, and to verify, you can log into either vCenter, and see that you can also manage the inventory of the other.
I will follow this up with my testing for vCenter repointing and recovering from a failed PSC in this topology.
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