). The warning indicates that the VMs are running with only one or no A-Links because, during the upgrade, the system does not add A-Link1.These Release Notes (updated at 10:28 PM on 4/29/2021) are for Stratus Redundant Linux Release 2.2.0.0, which runs on ztC Edge systems. See the following sections:
The following features are new in Stratus Redundant Linux Release 2.2.0.0:
Security Improvements:
For information, see New in Stratus Redundant Linux Release 2.1.0.0.
ZTC-3175: The Nessus scan identifies deprecated SSL protocols on port 5560. (The deprecated protocols have been removed.)
ZTC-3171: SSH Cipher settings do not pass all security scans. (Settings have been modified to increase security and to pass these scans.)
ZTC-3017, ZTC-2257: Users with special characters in passwords fail to join Active Directory (AD). (AD usernames and passwords that contain special characters such as “$”, “!”, “&” and “<” are now supported when logging into AD.
ZTC-2773: The lvmetad daemon has a known memory leak and has been deprecated. (The daemon has been configured to no longer run.)
ZTC-2395, ZTC-2396: The Qualys scan fails QID 37839 and QID 38738. (SSH settings have been modified to be more secure and pass this scan.)
ZTC-2256: The mcelog package is not installed by default. (mcelog is now installed by default.)
ZTC-2206: The Qualys scan fails QID 13162. (The session cookie now includes the secure attribute, which allows this scan to pass.)
ZTC-1298: Windows guests experience performance issues due to lack of a hypervclock setting. (Windows 2016 and Windows 2019 guests performance issues have been addressed by adding the hypervclock setting to the configuration.)
ZTC-962: The Stratus-supplied SSL certificate has an expiration date of 2026. (A new certificate has been provided that expires 10 years from the date of release (for example, 2030). You must accept the new certificate; see During Upgrade, Refresh Browser and Accept New Certificate.)
ZTC-461: Unable to login to Active Directory after a primary node failover.
ZTC-458: Guests configured with boot priority order may fail to start.
ZTC-454: Root, swap, or diagdata may display as broken after a fresh install or node recover/replace.
ZTC-453: Generate an alert when guest startup fails.
For information, see Bug Fixes in Stratus Redundant Linux Release 2.1.0.0.
For a list of the CVE fixes, see Fixed CVEs.
To upgrade to Stratus Redundant Linux Release 2.2.0.0, follow the upgrade path for the release that is running on your system:
To determine the version of Stratus Redundant Linux running on a ztC Edge system, log on to the ztC Console for the system and check the system information in the masthead:
Alternatively, you can click Software Updates on the Preferences page, which also displays the current version number of the Stratus Redundant Linux software on your system.
If the software release is lower than Release 2.2.0.0, download the Stratus Redundant Linux 2.2.0.0 Upgrade Kit from the Downloads page at https://www.stratus.com/services-support/downloads/?tab=ztcedge and upgrade the software on the system as described in Upgrading Stratus Redundant Linux Software Using an Upgrade Kit.
During an upgrade to Release 2.2.0.0, the browser may display the upgrade as stalled after the first node has been upgraded and become the new primary node. This incorrect browser display can occur if the browser has a new certificate from Stratus that needs to be accepted. You should refresh the browser and, if prompted, accept the new certificate. After you have accepted the new certificate, the browser displays the correct status of the upgrade.
ztC Edge systems incorporate Intel Active Management Technology (AMT) lights-out support for remote power management, remote console, and remote media. For important information about AMT configuration and restrictions, see KB-8219.
When you deploy a ztC Edge system, you must deploy both nodes at the same site and directly connect the A-links between the blue (A2) and yellow (A1) network ports of each node. If you want to set up a ztC Edge system in an automated local site recovery (ALSR) configuration, where each node is located at a separate physical site for increased redundancy, contact your authorized Stratus service representative for assistance. Because of the geographic separation, an ALSR configuration requires careful planning of component placement and networking topologies.
Stratus Redundant Linux Release 2.2.0.0 or higher introduces support for ztC Advisor, a secure web-based portal that provides centralized visibility of your entire fleet of ztC Edge systems. Through an intuitive, user-friendly dashboard, you can assess at a glance, the health, resource usage, and software version of each system.
For information about registering for and using ztC Advisor, see the following web page: https://www.stratus.com/solutions/ztc-advisor. To enable or disable ztC Advisor for a system, see Enabling ztC Advisor.
For a list of the guest operating systems tested with the current release, see Tested Guest Operating Systems.
Before starting a kit upgrade on a single-node system, ensure that the system is not in maintenance mode. If the single-node system is in maintenance mode when a kit upgrade is started, the system cannot exit from maintenance mode.
After a Windows 2008 SP2 (32-bit) VM is created, the installation of the VirtIO serial driver fails. In this situation, you must install the driver manually. To do so, download the VirtIO ISO file from the Downloads page at https://www.stratus.com/services-support/downloads/?tab=ztcedge. Continue by following instructions in Updating the VirtIO Drivers (Windows-based VMs), though selecting the serial driver (vioser). Note that this problem does not occur with the 64-bit version of Windows 2008 SP2.
Before migrating a PM or VM using a bootable P2V client (virt-p2v) ISO file, check if any removable media (for example, floppy disks, DVD drives, or external USB disks) are attached to the source image. If removable media are attached to the source image when you attempt to migrate a PM or VM, the error message Conversion failed appears. So, deselect the media in the virt-p2v window before starting the migration. To do so, access the virt-p2v window with the sections Target properties and Fixed hard disks, and then beneath Fixed hard disks, uncheck the box in the Convert column next to the removable media. See Migrating a Physical Machine or Virtual Machine to a System, particularly the section To migrate a PM or VM to the ztC Edge system, for more information on using virt-p2v.
When you import a VM using the Import/Restore Virtual Machine wizard, the maximum length of the path to the VM, including the VM name, is 4096 characters for the import options Import from remote/network Windows Share(CIFS/SMB) and Import from remote/network NFS.
If you begin to import an OVA file and then the node is placed into maintenance mode or loses power, the OVA import fails, and any future attempt to import an OVA file fails. For information on a work-around for this problem, see KB-10034.
Importing a Linux VMware OVA file changes the network interface and networks-scripts file. After you import the file, you need to manually configure the network information using the following procedure:
On the Virtual Machines page, select the VM.
Click Console in the bottom panel to open the VM login page (for additional information, see Opening a Virtual Machine Console Session).
Login into the VM.
Open a command prompt window.
Issue the ifconfig command. In the command output, check if ip address is assigned to the virtual network interface eth0.
If ip address is not assigned to eth0, list the contents of the /etc/sysconfig/network-scripts directory.
Note the value of ifcfg-xxxx (though not ifcfg-lo).
Rename ifcfg-xxxx to be ifcfg-eth0.
Edit the ifcfg-eth0 file, changing the values of DEVICE and ONBOOT, as follows:
Save the file.
Issue the following command to restart network services:
Verify the IP assignment by issuing the command ifconfig. In the command output, confirm that ip address is assigned to eth0.
When you select Import from USB in the Import/Restore Virtual Machine wizard to import an OVA file, you can enter a file name or partial file name in the Search Files box. The box lists OVA files that have names matching the name entered in the box, and that reside in various directories:
For complete information on importing an OVA file, see Importing an OVF or OVA File.
You cannot import a VM running RHEL 8.1 (with BIOS boot firmware) from a VMware ESXi 6.7.0 server to a ztC Edge system.
On the Virtual Machines page of the ztC Console, you can open a VM console session to display the console of the guest operating system running in the VM. When you open a console session to access a guest VM with a UEFI boot type, the console session has a maximum resolution of 800x600. For a higher resolution, connect to the VM using a Remote Desktop Connection.
After a system is upgraded from Release 2.0.1.0 (or earlier) to Stratus Redundant Linux Release 2.2.0.0 using an upgrade kit, support for vmgenid on VMs running Windows Server 2019, Windows Server 2016, or Windows Server 2012 is not present until after the VMs are restarted. Therefore, you must restart such VMs to enable vmgenid support after the upgrade. If you are upgrading from Release 2.1.0.0, you do not need to restart such VMs if they had previously been restarted on the system running Release 2.1.0.0. .
When you are using Microsoft Edge as the browser for the ztC Console you cannot create a VCD: the process will fail. Instead, use another compatible browser (see Compatible Internet Browsers).
When importing a VMware VM, you must shutdown the VM using operating system shutdown commands in addition to powering it off from the VMware console. If you shutdown the VM using only the VMware console, the import will fail.
When you create a VM on a system licensed for one node, the VM Creation Wizard displays that it is adding two vCPUs to the number vCPUs you specify. However, once the VM is created, the user-specified number of vCPUs is attached to the VM. The additional two (incorrectly displayed) vCPUs are not added.
When you upgrade a system licensed for one node to a system licensed for two nodes, the VMs remain running, but the Dashboard displays the VM state with a warning icon (). The warning indicates that the VMs are running with only one or no A-Links because, during the upgrade, the system does not add A-Link1.
To avoid the issue, stop the VMs before the upgrade and then restart the VMs after the upgrade. If you encounter this problem, stop and restart the VMs after the upgrade.
The mapping of the Japanese keyboards 106 and 109 may be incorrect when using IE10, IE11, or Firefox to access the ztC Console. Use Chrome or remote connection software (VNC or RDP), instead.
When monitoring on a VM is set for all three parameters (CPU, Memory, and Disk), and the VM is migrated to the other node, the Monitor tab displays No response from guest agent. It may take several minutes for the guest agent to reconnect.
If an A-link cable or network is disconnected on one node, the state of a VM on that node may be reported as broken (
) in the ztC Console, even though the VM still has another active A-link connection. The availability of the VM is unaffected.
If you use the ztC Console to eject a VCD from a VM running a Linux-based guest operating system, the VCD may still be displayed in the guest operating system. If needed, you can eject the VCD in the guest operating system to stop displaying the VCD.
If you are connected to the ztC Console using an https URL in a Microsoft Internet Explorer or Mozilla® FireFox® browser, and you click Console after selecting a running VM from the Virtual Machines page, the message VNC: Unable to connect, retrying in n seconds may appear. To enable the VNC connection, click the https link to the VNC console page in the upper right-hand corner of the masthead, and continue with the appropriate procedure below (procedure in your browser may differ, depending on the version of your browser):
In Internet Explorer, the Security Alert wizard appears:
In FireFox, the Your connection is not secure window appears:
Click Confirm Security Exception.
The VNC console appears.
When you change the IP address or netmask settings of a node as described in Configuring IP Settings, both the old and new settings are in effect until you reboot the node. Having both settings active may cause routing or connection issues.
Beginning in Release 2.0.0.0, Help is available in German, Japanese, Chinese, and Portuguese.
The Stratus Customer Service Portal provides a searchable Knowledge Base with technical articles about all Stratus products, including ztC Edge systems and Stratus Redundant Linux software. In some cases, the Release Notes directly reference these Knowledge Base articles (for example, KB-nnnn). You can access the Customer Service Portal and the Knowledge Base articles by using your existing service portal credentials, or by creating a new user account, as follows.
To access the Knowledge Base
Log on to the Stratus Customer Service Portal at https://support.stratus.com.
If needed, create a new account as follows:
Enter your company email address and contact info, and click Register.
Your company email address must include a domain name (for example, stratus.com) for a company that is a registered customer of Stratus.
If you need assistance creating an account, contact your authorized Stratus service representative.
In the Keyword Search box, enter keywords associated with the information you need, and then click Search.
To search for an article by its KB-nnnn number, click Advanced Search. Next to Search by ID, type the article ID number (nnnn) and click Display.
If you have a technical question about ztC Edge systems, you can find the latest technical information and online documentation at the Downloads page at https://www.stratus.com/services-support/downloads/?tab=ztcedge. You can also search the Knowledge Base in the Stratus Customer Service Portal at https://support.stratus.com.
If you cannot resolve your questions with these online resources, and the system is covered by a service agreement, contact your authorized Stratus service representative. For information, see the ztC Edge Support page at https://www.stratus.com/services-support/customer-support/?tab=ztcedge.
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