Ceph Pacific : Cephadm #2 Configure Cluster2021/07/08 |
Configure Ceph Cluster with [Cephadm] that is a Ceph Cluster Deploy tool.
For example on here, Configure Ceph Cluster with 3 Nodes like follows.
Furthermore, each Storage Node has a free block device to use on Ceph Nodes. (use [/dev/sdb] on this example) | +----------------------------+----------------------------+ | | | |10.0.0.51 |10.0.0.52 |10.0.0.53 +-----------+-----------+ +-----------+-----------+ +-----------+-----------+ | [node01.srv.world] | | [node02.srv.world] | | [node03.srv.world] | | Object Storage +----+ Object Storage +----+ Object Storage | | Monitor Daemon | | | | | | Manager Daemon | | | | | +-----------------------+ +-----------------------+ +-----------------------+ |
[1] | |
[2] | To add Nodes to Cluster, run like follows. For example, add [node02], [node03]. |
# transfer SSH public key [root@node01 ~]# ssh-copy-id -f -i /etc/ceph/ceph.pub root@node02 Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'root@node02'" and check to make sure that only the key(s) you wanted were added.[root@node01 ~]# ssh-copy-id -f -i /etc/ceph/ceph.pub root@node03 Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'root@node03'" and check to make sure that only the key(s) you wanted were added. # add target Nodes to Cluster [root@node01 ~]# ceph orch host add node02 Inferring fsid 6df4185a-dfb3-11eb-adb7-525400238cef Inferring config /var/lib/ceph/6df4185a-dfb3-11eb-adb7-525400238cef/mon.node01/config Using recent ceph image docker.io/ceph/ceph@sha256:54e95ae1e11404157d7b329d0bef866ebbb214b195a009e87aae4eba9d282949 Added host 'node02'[root@node01 ~]# ceph orch host add node03 Inferring fsid 6df4185a-dfb3-11eb-adb7-525400238cef Inferring config /var/lib/ceph/6df4185a-dfb3-11eb-adb7-525400238cef/mon.node01/config Using recent ceph image docker.io/ceph/ceph@sha256:54e95ae1e11404157d7b329d0bef866ebbb214b195a009e87aae4eba9d282949 Added host 'node03'[root@node01 ~]# ceph orch host ls Inferring fsid 6df4185a-dfb3-11eb-adb7-525400238cef Inferring config /var/lib/ceph/6df4185a-dfb3-11eb-adb7-525400238cef/mon.node01/config Using recent ceph image docker.io/ceph/ceph@sha256:54e95ae1e11404157d7b329d0bef866ebbb214b195a009e87aae4eba9d282949 HOST ADDR LABELS STATUS node01 node01 node02 node02 node03 node03 |
[3] | To configure OSD, run like follows. For example, configure [node01], [node02], [node03]. |
# list available devices # possible to set if [AVAIL = True] [root@node01 ~]# ceph orch device ls Hostname Path Type Serial Size Health Ident Fault Available node01 /dev/sdb hdd 85.8G Unknown N/A N/A Yes node02 /dev/sdb hdd 85.8G Unknown N/A N/A Yes node03 /dev/sdb hdd 85.8G Unknown N/A N/A Yes # configure OSD [root@node01 ~]# ceph orch daemon add osd node01:/dev/sdb Created osd(s) 0 on host 'node01' [root@node01 ~]# ceph orch daemon add osd node02:/dev/sdb Created osd(s) 1 on host 'node02' [root@node01 ~]# ceph orch daemon add osd node03:/dev/sdb Created osd(s) 2 on host 'node03' # after few minutes, status turns to [HEALTH_OK] [root@node01 ~]# ceph -s cluster: id: 6df4185a-dfb3-11eb-adb7-525400238cef health: HEALTH_OK services: mon: 3 daemons, quorum node01,node02,node03 (age 4m) mgr: node01.ftzoaf(active, since 23m), standbys: node02.ypaecy osd: 3 osds: 3 up (since 22s), 3 in (since 45s) data: pools: 1 pools, 1 pgs objects: 0 objects, 0 B usage: 15 MiB used, 240 GiB / 240 GiB avail pgs: 1 active+clean |
[4] | To remove OSD, run like follows. |
[root@node01 ~]# ceph osd tree ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF -1 0.23428 root default -3 0.07809 host node01 0 hdd 0.07809 osd.0 up 1.00000 1.00000 -5 0.07809 host node02 1 hdd 0.07809 osd.1 up 1.00000 1.00000 -7 0.07809 host node03 2 hdd 0.07809 osd.2 up 1.00000 1.00000 # for example, remove OSD ID [2] [root@node01 ~]# ceph orch osd rm 2 Scheduled OSD(s) for removal # show removal status # completes if no entries are shown # takes many times [root@node01 ~]# ceph orch osd rm status OSD_ID HOST STATE PG_COUNT REPLACE FORCE DRAIN_STARTED_AT 2 node03 draining 1 False False 2021-07-08 06:38:42.239748 |
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