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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 18:24:20 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 18:24:20 +0000 |
commit | 483eb2f56657e8e7f419ab1a4fab8dce9ade8609 (patch) | |
tree | e5d88d25d870d5dedacb6bbdbe2a966086a0a5cf /doc/rbd/iscsi-requirements.rst | |
parent | Initial commit. (diff) | |
download | ceph-483eb2f56657e8e7f419ab1a4fab8dce9ade8609.tar.xz ceph-483eb2f56657e8e7f419ab1a4fab8dce9ade8609.zip |
Adding upstream version 14.2.21.upstream/14.2.21upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | doc/rbd/iscsi-requirements.rst | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/doc/rbd/iscsi-requirements.rst b/doc/rbd/iscsi-requirements.rst new file mode 100644 index 00000000..57e42be9 --- /dev/null +++ b/doc/rbd/iscsi-requirements.rst @@ -0,0 +1,50 @@ +========================== +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`. |