mirror of
https://github.com/ceph/ceph
synced 2024-12-25 04:43:17 +00:00
71e46887d4
Added note about the requirement for the latest ceph-iscsi version 3 to the dashboard documentation. Added some doc references and replaced some URLs in the iSCSI docs with reST labels instead. Signed-off-by: Lenz Grimmer <lgrimmer@suse.com>
51 lines
1.5 KiB
ReStructuredText
51 lines
1.5 KiB
ReStructuredText
==========================
|
|
iSCSI Gateway Requirements
|
|
==========================
|
|
|
|
To implement the Ceph iSCSI gateway there are a few requirements. It is recommended
|
|
to use two to four iSCSI gateway nodes for a highly available Ceph iSCSI gateway
|
|
solution.
|
|
|
|
For hardware recommendations, see :ref:`hardware-recommendations` for more
|
|
details.
|
|
|
|
.. note::
|
|
On the iSCSI gateway nodes, the memory footprint of the RBD images
|
|
can grow to a large size. Plan memory requirements accordingly based
|
|
off the number RBD images mapped.
|
|
|
|
There are no specific iSCSI gateway options for the Ceph Monitors or
|
|
OSDs, but it is important to lower the default timers for detecting
|
|
down OSDs to reduce the possibility of initiator timeouts. The following
|
|
configuration options are suggested for each OSD node in the storage
|
|
cluster::
|
|
|
|
[osd]
|
|
osd heartbeat grace = 20
|
|
osd heartbeat interval = 5
|
|
|
|
- Online Updating Using the Ceph Monitor
|
|
|
|
::
|
|
|
|
ceph tell <daemon_type>.<id> config set <parameter_name> <new_value>
|
|
|
|
::
|
|
|
|
ceph tell osd.0 config set osd_heartbeat_grace 20
|
|
ceph tell osd.0 config set osd_heartbeat_interval 5
|
|
|
|
- Online Updating on the OSD Node
|
|
|
|
::
|
|
|
|
ceph daemon <daemon_type>.<id> config set osd_client_watch_timeout 15
|
|
|
|
::
|
|
|
|
ceph daemon osd.0 config set osd_heartbeat_grace 20
|
|
ceph daemon osd.0 config set osd_heartbeat_interval 5
|
|
|
|
For more details on setting Ceph's configuration options, see
|
|
:ref:`configuring-ceph`.
|