Operating System

The default operating system must be installed to ensure that all required packages are installed. The minimal operating system install does not contain all of the required packages, and therefore, cannot be used with LifeKeeper.

Kernel updates

In order to provide the highest level of availability for a LifeKeeper cluster, the kernel version used on a system is very important. The table below lists each supported distribution and version with the kernel that has passed LifeKeeper certification testing.

Distribution/Version Supported Version Supported Kernels
Red Hat Enterprise Linux 7 for AMD64/EM64T
7 3.10.0-123.el7
7.1 3.10.0-229.el7
7.2 3.10.0-327.el7
7.3 3.10.0-514.el7
7.4 *1 3.10.0-693.el7
7.5 *1 3.10.0-862.el7
7.6 *1 3.10.0-957.el7
7.7 3.10.0-1062.el7
7.8 3.10.0-1127.el7
7.9 3.10.0-1160.el7
Red Hat Enterprise Linux 8 for AMD64/EM64T
8.0 4.18.0-80.el8.x86_64
8.1 4.18.0-147.el8.x86_64
8.2 4.18.0-193.el8.x86_64
8.3 4.18.0-240.el8.x86_64
8.4 4.18.0-305.el8.x86_64
8.5 4.18.0-348.el8.x86_64
8.6 *2 4.18.0-372.9.1.el8.x86_64
8.7 4.18.0-425.3.1.el8.x86_64
8.8 4.18.0-477.10.1.el8_8.x86_64
8.9 4.18.0-513.5.1.el8_9.x86_64
Red Hat Enterprise Linux 9 for AMD64/EM64T
9.0 *2 5.14.0-70.13.1.el9_0
9.1 5.14.0-162.6.1.el9_1
9.2 5.14.0-284.11.1.el9_2
9.3 5.14.0-362.8.1.el9_3
CentOS 7
7 3.10.0-123.el7
7.1 3.10.0-229.el7
7.2 3.10.0-327.el7
7.3 3.10.0-514.el7
7.4 *1 3.10.0-693.el7
7.5 *1 3.10.0-862.el7
7.6 *1 3.10.0-957.el7
7.7 3.10.0-1062.el7
7.8 3.10.0-1127.el7
7.9 3.10.0-1160.el7
CentOS 8
8.0 4.18.0-80.el8.x86_64
8.1 4.18.0-147.el8.x86_64
8.2 4.18.0-193.el8.x86_64
8.3 4.18.0-240.el8.x86_64
Oracle Linux 7
7 3.10.0-123.el7
7.1 3.10.0-229.el7
7.2 3.10.0-327.el7
7.3 3.10.0-514.el7
7.4 *1 3.10.0-693.el7
7.5 *1 3.10.0-862.el7
7.6 *1 3.10.0-957.el7
7.7 3.10.0-1062.el7
7.8 3.10.0-1127.el7
7.9 3.10.0-1160.el7
UEK R3 3.8.13-16.2.1.el7uek
UEK R4 4.1.12-37.3.1.el7uek
UEK R5 4.14.35-1818.3.3.el7uek
UEK R6 *3 5.4.17-2102.202.5.el7uek
Oracle Linux 8
8.0 4.18.0-80.el8.x86_64
8.1 4.18.0-147.el8.x86_64
8.2 4.18.0-193.el8.x86_64
8.3 4.18.0-240.el8.x86_64
8.4 4.18.0-305.el8.x86_64
8.5 4.18.0-348.el8.x86_64
8.6 *2 4.18.0-372.9.1.el8.x86_64
8.7 4.18.0-425.3.1.el8.x86_64
8.8 4.18.0-477.21.1.el8_8.x86_64
8.9 4.18.0-513.11.0.1.el8_9.x86_64
UEK R6 *3 5.4.17-2102.202.5.el8uek / 5.4.17-2136.324.5.3.el8uek / 5.4.17-2136.328.3.el8uek.x86_64
UEK R7 5.15.0-3.60.5.1.el8uek.x86_64 / 5.15.0-101.103.2.1.el8uek / 5.15.0-202.135.2.el8uek.x86_64
Oracle Linux 9
9.0 *2 5.14.0-70.13.1.el9_0
9.1 5.14.0-162.6.1.el9_1
9.2 5.14.0-284.11.1.el9_2
9.3 5.14.0-362.8.1.el9_3
UEK R7
5.15.0-0.30.19.el9uek
5.15.0-101.103.2.1.el9uek
5.15.0-200.131.27.el9uek
Miracle Linux 8
8.4 4.18.0-305.el8.x86_64
8.6 *2 4.18.0-372.9.1.el8.x86_64
8.8 4.18.0-477.27.2.el8_8
Miracle Linux 9
9.0 *2 5.14.0-70.13.1.el9_0
9.2 5.14.0-284.30.1.el9_2
Rocky Linux 8
8.4 4.18.0-305.3.1.el8_4
8.5 4.18.0-348.el8.0.2
8.6 *2 4.18.0-372.9.1.el8
8.7 4.18.0-425.3.1.el8
8.8 4.18.0-477.13.1.el8
8.9 4.18.0-513.5.1.el8_9
Rocky Linux 9
9.0 *2 5.14.0-70.13.1.el9_0
9.1 5.14.0-162.6.1.el9_1
9.2 5.14.0-284.11.1.el9_2
9.3 5.14.0-362.8.1.el9_3
SUSE Linux Enterprise Server 12 for x86_64
12 SP1 3.12.49-11.1
12 SP2 4.4.21-69.1
12 SP3 *4 4.4.82-6.9.1
12 SP4 4.12.14-94.41.1
12 SP5 4.12.14-120.1
SUSE Linux Enterprise Server 15 for x86_64
15 *5 4.12.14-23.1
15 SP1 4.12.14-195.1
15 SP2 5.3.18-14.1
15 SP3 *6 5.3.18-59.5
15 SP4 5.14.21-150400.24.21.2
15 SP5 5.14.21-150500.53.2

*1 DataKeeper asynchronous mirrors are not supported on some kernels. See Known Issues / Restrictions for more information.
*2 DataKeeper asynchronous mode is not supported on thin provisioned disks due to kernel issues. See Known Issues / Restrictions for more information.
*3 For UEK6, upgrade the kernel to 5.4.17-2102.202.5 .
*4 For SP3, upgrade the kernel to 4.4.82-6.9.1.
*5 DataKeeper cannot use disks with an odd sector size.
*6 For SP3, upgrade the kernel to 5.3.18-59.5.

LUN support

The Linux SCSI driver has several parameters that control which devices will be probed for Logical Units (LUNs):

  • List of devices that do not support LUNs – this list of devices are known to NOT support LUNs, so the SCSI driver will not allow the probing of these devices for LUNs.
  • List of devices that do support LUNs – this list of devices is known to support LUNs well, so always probe for LUNs.
  • Probe all LUNs on each SCSI device – if a device is not found on either list, whether to probe or not. This parameter is configured by make config in the SCSI module section.

While most distributions (including SUSE) have the Probe all LUNs setting enabled by default, Red Hat has the setting disabled by default. External RAID controllers that are typically used in LifeKeeper configurations to protect data are frequently configured with multiple LUNs (Logical Units). To enable LUN support, this field must be selected and the kernel remade.

To enable Probe all LUNs without rebuilding the kernel or modules, set the variable max_scsi_luns to 255 (which will cause the scan for up to 255 LUNs). To set the max_scsi_luns on a kernel where the scsi driver is a module (e.g. Red Hat), add the following entry to /etc/modules.conf, rebuild the initial ramdisk and reboot loading that ramdisk:

options scsi_mod max_scsi_luns=255

To set the max_scsi_luns on a kernel where the scsi driver is compiled into the kernel (e.g. SUSE), add the following entry to /etc/lilo.conf:

append="max_scsi_luns=255"

Testing environment of channel bonding, network teaming

In LifeKeeper, we performed tests in the environment using the channel bonding or network teaming with the following settings:

  • Bonding policy in channel bonding
    • balance-rr
    • active-backup
  • Runner in network teaming
    • round-robin
    • active-backup

For RHEL8 or later, set connection.autoconnect-slaves to true by NetworkManager.

Feedback

Was this helpful?

Yes No
You indicated this topic was not helpful to you ...
Could you please leave a comment telling us why? Thank you!
Thanks for your feedback.

Post your comment on this topic.

Post Comment