Adding a Ceph OSD node

Verify that other nodes in the storage cluster can reach the new node by its short host name.

Temporarily disable scrubbing:

Example

[ceph: root@host01 /]# ceph osd set noscrub
[ceph: root@host01 /]# ceph osd set nodeep-scrub

Limit the backfill and recovery features:

Syntax

ceph tell DAEMON_TYPE.* injectargs --OPTION_NAME VALUE [--OPTION_NAME VALUE]

Example

[ceph: root@host01 /]# ceph tell osd.* injectargs --osd-max-backfills 1 --osd-recovery-max-active 1 --osd-recovery-op-priority 1

Extract the cluster’s public SSH keys to a folder:

Syntax

ceph cephadm get-pub-key > ~/PATH

Example

[ceph: root@host01 /]# ceph cephadm get-pub-key > ~/ceph.pub

Copy ceph cluster’s public SSH keys to the root user’s authorized_keys file on the new host:

Syntax

ssh-copy-id -f -i ~/PATH root@HOST_NAME_2

Example

[ceph: root@host01 /]# ssh-copy-id -f -i ~/ceph.pub root@host02

Add the new node to the CRUSH map:

Syntax

ceph orch host add NODE_NAME IP_ADDRESS

Example

[ceph: root@host01 /]# ceph orch host add host02 10.10.128.70

Add an OSD for each disk on the node to the storage cluster.

• Using Deploying Ceph OSDs on all available devices.

• Using Deploying Ceph OSDs using advanced service specification.

• Using Deploying Ceph OSDs on specific devices and hosts.