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host utilities, red hat, rhel, linux, 20.04, netapp, ontap, ubuntu
Describes how to use Ubuntu 22.04 with ONTAP

Use Ubuntu 22.04 with ONTAP

You can use the ONTAP SAN host configuration settings to configure Ubuntu 22.04 with ONTAP as the target.

Note
 NetApp Linux Unified Host Utilities software package is not available for Ubuntu 22.04 OS.

SAN booting

What you’ll need

If you decide to use SAN booting, it must be supported by your configuration. You can use the NetApp Interoperability Matrix Tool to verify that your OS, HBA, HBA firmware and the HBA boot BIOS, and ONTAP version are supported.

Multipathing

For Ubuntu 22.04, the /etc/multipath.conf file must exist, but you do not need to make specific changes to the file. Ubuntu 22.04 is compiled with all the settings required to recognize and correctly manage ONTAP LUNs.

# multipath -ll
3600a098038314559533f524d6c652f62 dm-24 NETAPP,LUN C-Mode
size=10G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 alua' wp=rw
`-+- policy='service-time 0' prio=50 status=active
  |- 11:0:1:13 sdm  8:192  active ready running
  |- 11:0:3:13 sdah 66:16  active ready running
  |- 12:0:1:13 sdbc 67:96  active ready running
  `- 12:0:3:13 sdbx 68:176 active ready running
# multipath -ll
3600a098038314c4c715d5732674e6141 dm-0 NETAPP,LUN C-Mode
size=10G features='3 queue_if_no_path pg_init_retries 50' hwhandler='1 alua' wp=rw
|-+- policy='service-time 0' prio=50 status=active
| |- 11:0:1:0 sda 8:0  active ready running
| `- 12:0:2:0 sdd 8:48 active ready running
`-+- policy='service-time 0' prio=10 status=enabled
  |- 11:0:2:0 sdb 8:16 active ready running
  `- 12:0:1:0 sdc 8:32 active ready running

Recommended settings

The Ubuntu 22.04 OS is compiled to recognize ONTAP LUNs and automatically set all configuration parameters correctly for both ASA and non-ASA configurations. You can further optimize performance for your host configuration with the following recommended settings.

Parameter Setting

detect_prio

yes

dev_loss_tmo

"infinity"

failback

immediate

fast_io_fail_tmo

5

features

"2 pg_init_retries 50"

flush_on_last_del

"yes"

hardware_handler

"0"

no_path_retry

queue

path_checker

"tur"

path_grouping_policy

"group_by_prio"

path_selector

"service-time 0"

polling_interval

5

prio

"ontap"

product

LUN.*

retain_attached_hw_handler

yes

rr_weight

"uniform"

user_friendly_names

no

vendor

NETAPP
Example

The following example shows how to correct an overridden default. In this case, the multipath.conf file defines values for path_checker and no_path_retry that are not compatible with ONTAP LUNs. If they cannot be removed because other SAN arrays are still attached to the host, these parameters can be corrected specifically for ONTAP LUNs with a device stanza.

defaults {
   path_checker      readsector0
   no_path_retry     fail
}

devices {
   device {
      vendor         "NETAPP  "
      product         "LUN.*"
      no_path_retry    queue
      path_checker     tur
   }
}

Known issues

There are no known issues for the Ubuntu 22.04 with ONTAP release.