Troubleshooting Windows Diego Cells

This topic describes how to troubleshoot Windows Diego Cells deployed by VMware Tanzu Application Service for VMs [Windows] (TAS for VMs [Windows]).

Installation Issues

This section describes issues that may occur during the installation process.

Missing Local Certificates for Windows File System Injector

Symptom

You run the winfs-injector and see the following error about certificates:

Get https://auth.docker.io/token?service=registry.docker.io&
scope=repository:cloudfoundry/windows2016fs:pull: x509:
failed to load system roots and no roots provided

Explanation

Local certificates are needed to communicate with Docker Hub.

Solution

Install the necessary certificates on your local machine. On Ubuntu, you can install certificates with the ca-certificates package.

Outdated Version for Windows File System Injector

Symptom

You run the winfs-injector and see the following error about a missing file or directory:

open ...windows2016fs-release/VERSION: no such file or directory

Explanation

You are using an outdated version of the winfs-injector.

Solution

From the VMware Tanzu Application Service for VMs [Windows] page on VMware Tanzu Network, download the recommended version of File System Injector tool for the tile.

Missing Container Image

Symptom

You click the + icon in Ops Manager to add the TAS for VMs [Windows] tile to the Installation Dashboard and see the following error:

Error invalid release uninjected tile

Explanation

The product file that you are trying to upload does not contain the Windows Server container base image.

Solution

  1. Delete the product file listing from Ops Manager by clicking its trash can icon under Import a Product.

  2. Follow the TAS for VMs [Windows] installation instructions to run the winfs-injector tool locally on the product file. This step adds the Windows Server container base image to the product file, requires internet access, and can take up to 20 minutes. For more information, see Install the Tile in Installing and Configuring TAS for VMs [Windows].

  3. Click Import a Product to upload the injected product file.

  4. Click the + icon next to the product listing to add the TAS for VMs [Windows] tile to the Installation Dashboard.

Upgrade Issues

This section describes issues that may occur during the upgrade process.

Failure to Create Containers When Upgrading with Shared Microsoft Base Image

Symptom

The pre-start script for the windowsfs job fails, and the upgrade fails with the following output:

Task 308031 | 13:47:04 | Preparing deployment: Preparing deployment (00:00:03)

Task 308031 | 13:47:11 | Preparing package compilation: Finding packages to compile (00:00:00)

Task 308031 | 13:47:21 | Updating instance windows_diego_cell: windows_diego_cell/44c5841f-7580-4e9c-9856-89fcbe08ab0d (2) (canary) (00:00:35)

L Error: Action Failed get_task: Task 59ba76d1-14c5-4d7b-681c-08b9ec4bd64d result: 1 of 10 pre-start scripts failed. Failed Jobs: windows1803fs. Successful Jobs: set_kms_host, groot, loggregator_agent_windows, bosh-dns-windows, rep_windows, winc-network-1803, set_password, enable_ssh, enable_rdp.

Task 308031 | 13:47:56 | Error: Action Failed get_task: Task 59ba76d1-14c5-4d7b-681c-08b9ec4bd64d result: 1 of 10 pre-start scripts failed. Failed Jobs: windows1803fs. Successful Jobs: set_kms_host, groot, loggregator_agent_windows, bosh-dns-windows, rep_windows, winc-network-1803, set_password, enable_ssh, enable_rdp.

Otherwise, the post-start script for the rep_windows job fails, and the upgrade fails with the following output:

Task 8192 | 21:12:30 | Updating instance windows2019-cell: windows2019-cell/bd6d70b9-ed1f-412f-9d49-8045627f4ab3 (0) (canary) (00:17:24)
                     L Error: Action Failed get_task: Task a9555020-1a3b-40c7-677c-d6fc392ce135 result: 1 of 3 post-start scripts failed. Failed Jobs: rep_windows. Successful Jobs: route_emitter_windows, bosh-dns-windows.
Task 8192 | 21:29:55 | Error: Action Failed get_task: Task a9555020-1a3b-40c7-677c-d6fc392ce135 result: 1 of 3 post-start scripts failed. Failed Jobs: rep_windows. Successful Jobs: route_emitter_windows, bosh-dns-windows.

Explanation

When upgrading between versions of Windows rootfs that have a shared Microsoft base layer, TAS for VMs [Windows] may fail to create containers.

Solution

For available workarounds, see Failure to create containers when upgrading with shared Microsoft base image in the Knowledge Base.

Forward Windows Diego Cell Logs

You can use Windows Diego Cell logs to troubleshoot Windows Diego Cells. Windows Diego Cells generate the following types of logs:

  • BOSH job logs, such as rep_windows and consul_agent_windows. These logs stream to the syslog server configured in the System Logging pane of the TAS for VMs [Windows] tile, along with other Ops Manager component logs. The names of these BOSH job logs correspond to the names of the logs emitted by Linux Diego Cells.

  • Windows event logs. These logs stream to the syslog server configured in the System Logging pane of the TAS for VMs [Windows] tile.

You can forward BOSH job logs and Windows Event logs to an external syslog server in the following ways:

  • Configure a BOSH add-on to forward BOSH job logs. For more information, see the BOSH jobs logs step in Install the Tile in Installing and Configuring TAS for VMs [Windows].

  • Configure TAS for VMs [Windows] to forward Windows event logs. For more information, see Forward Windows Event Logs to a Syslog Server.

You can download the forwarded BOSH job logs and Window event logs in the TAS for VMs [Windows] tile. For more information, see Download Diego Cell Logs.

Forward Windows Event Logs to a Syslog Server

To forward Windows event logs to an external syslog server:

  1. Navigate to the Ops Manager Installation Dashboard.

  2. Click the TAS for VMs [Windows] tile.

  3. Select System Logging.

    Win syslog config

  4. Under Enable syslog for VM logs?, select Enable.

  5. Under Address, enter the hostname or IP address of your syslog server.

  6. Under Port, enter the port of your syslog server. The default port is 514.

    Note: The host must be reachable from the TAS for VMs network. Ensure that your syslog server listens on external interfaces.

  7. Under Protocol, select the transport protocol to use when forwarding logs.

  8. Enable the Enable system metrics checkbox. For a list of the VM metrics that the System Metric Agent emits, see VM Metrics in the System Metrics repository on GitHub.

  9. Click Save.

Download Windows Diego Cell Logs

To download Windows Diego Cell logs:

  1. Navigate to the Ops Manager Installation Dashboard.

  2. Click the TAS for VMs [Windows] tile.

  3. Click the Status tab.

  4. Under the Logs column, click the download icon for the Windows Diego Cell for which you want to retrieve logs.

  5. Click the Logs tab.

  6. When the logs are ready, click the filename to download them.

  7. Unzip the file to examine the contents. Each component on the Diego Cell has its own logs directory:

    • /consul_agent_windows/
    • /garden-windows/
    • /metron_agent_windows/
    • /rep_windows/

Troubleshoot Windows Compilation VMs

BOSH automatically deletes a compilation VM after the compilation VM fails. In a vSphere environment, use one of the procedures below to troubleshoot your Windows stemcell v2019.7 and later compilation VM issues:

Troubleshoot a Slowly-Deleted Windows Compilation VM

The easiest method to troubleshoot a Windows compilation VM is to bosh ssh to the VM before BOSH deletes it.

To troubleshoot a compilation VM from an ssh session:

  1. Open the vSphere UI.

  2. Open two different BOSH CLI terminal sessions.

  3. Open Ops Manager.

  4. Enable the two following settings in Ops Manager:

    • Select Keep Unreachable Director VMs from BOSH Director tile > Director config.
    • Select enable BOSH-native SSH support on all VMs from TAS for VMs [Windows] tile > VM options.
  5. Click Apply Changes against the TAS for VMs [Windows] tile.

  6. From the first BOSH CLI terminal, monitor the BOSH task:

    watch -n 5 "bosh -d TAS-WINDOWS-DEPLOYMENT is --details | grep compilation"
    

    Where TAS-WINDOWS-DEPLOYMENT is the name of your TAS for VMs [Windows] deployment.

  7. Wait until the compilation VM CID is up.

  8. From the second BOSH CLI terminal, SSH to the Windows compilation VM:

    bosh -d TAS-WINDOWS-DEPLOYMENT ssh COMPILATION-NAME
    

    Where:

    • TAS-WINDOWS-DEPLOYMENT is the name of your TAS for VMs [Windows] deployment.
    • COMPILATION-NAME is the name of your Windows compilation VM.
  9. To prevent BOSH from deleting the compilation VM after the compilation VM fails, search for the compilation VM CID in the vSphere UI and rename it.

  10. You can now troubleshoot within this session.

  11. After troubleshooting, delete the VM manually.

Troubleshoot a Quickly-Deleted Windows Compilation VM

In some situations, the Windows compilation VM might be deleted very quickly, making it impossible to bosh ssh to the VM before BOSH deletes it.

To troubleshoot a quickly-deleted compilation VM:

  1. Download an Ubuntu desktop image from Ubuntu Releases Xenial.

  2. Upload the Ubuntu desktop image into your vSphere datastore.

  3. Open the vSphere UI.

  4. Open a BOSH CLI terminal session.

  5. Open Ops Manager.

  6. Enable the two following settings in Ops Manager:

    • Select Keep Unreachable Director VMs from BOSH Director tile > Director config.
    • Select enable BOSH-native SSH support on all VMs from TAS for VMs [Windows] tile > VM options.
  7. Click Apply Changes in Ops Manager.

  8. From the BOSH CLI terminal, monitor the BOSH task:

    watch -n 5 "bosh -d TAS-WINDOWS-DEPLOYMENT is --details | grep compilation"
    

    Where TAS-WINDOWS-DEPLOYMENT is the name of your TAS for VMs [Windows] deployment.

  9. Wait until the compilation VM CID is up.

  10. From the vSphere UI:

    1. Locate the compilation VM CID in the vSphere UI.
    2. To prevent BOSH from deleting the compilation VM after the compilation VM fails, rename the compilation VM.
    3. On the Windows compilation VM, go to Edit settings > add a device CD/DVD drive > browse Datastore ISO file, and select the Ubuntu desktop iso -> select Connect at Power ON.
    4. Go to Edit settings -> VM options tab -> Boot Options.
    5. Increase the Boot Delay to 10000 milliseconds.
    6. Select Force BIOS Setup.
    7. Select Start/Restart to restart the VM.
  11. On the BIOS setup screen, boot with the CD-ROM Drive.

  12. After Ubuntu desktop starts, select try Ubuntu and launch a terminal.

  13. In the terminal, run:

    sudo fdisk -l
    sudo mkdir /mnt/windows
    sudo mount /dev/sda1 /mnt/windows
    
  14. You can now troubleshoot within this session by exploring the contents of the windows VM’s file system within /mnt/windows

  15. After troubleshooting, delete the VM manually.