Ceph Nautilus : Use File System2021/03/31 |
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Configure a Client Host [dlp] to use Ceph Storage like follows.
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+--------------------+ |
| [dlp.srv.world] |10.0.0.30 |
| Ceph Client +-----------+
| | |
+--------------------+ |
+----------------------------+----------------------------+
| | |
|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 | | | | |
+-----------------------+ +-----------------------+ +-----------------------+
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For example, mount as Filesystem on a Client Host.
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| [1] | Transfer SSH public key to Client Host and Configure it from Admin Node. |
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# transfer public key [root@node01 ~]# ssh-copy-id dlp # install required packages [root@node01 ~]# ssh dlp "dnf -y install centos-release-ceph-nautilus" [root@node01 ~]# ssh dlp "dnf -y install ceph-fuse"
# transfer required files to Client Host [root@node01 ~]# scp /etc/ceph/ceph.conf dlp:/etc/ceph/ ceph.conf 100% 195 98.1KB/s 00:00[root@node01 ~]# scp /etc/ceph/ceph.client.admin.keyring dlp:/etc/ceph/ ceph.client.admin.keyring 100% 151 71.5KB/s 00:00[root@node01 ~]# ssh dlp "chown ceph. /etc/ceph/ceph.*" |
| [2] | Configure MDS (MetaData Server) on a Node. Configure it on [node01] Node on this example. |
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# create directory # directory name ⇒ (Cluster Name)-(Node Name) [root@node01 ~]# mkdir -p /var/lib/ceph/mds/ceph-node01 [root@node01 ~]# ceph-authtool --create-keyring /var/lib/ceph/mds/ceph-node01/keyring --gen-key -n mds.node01 creating /var/lib/ceph/mds/ceph-node01/keyring [root@node01 ~]# chown -R ceph. /var/lib/ceph/mds/ceph-node01 [root@node01 ~]# ceph auth add mds.node01 osd "allow rwx" mds "allow" mon "allow profile mds" -i /var/lib/ceph/mds/ceph-node01/keyring added key for mds.node01 [root@node01 ~]# systemctl enable --now ceph-mds@node01 |
| [3] | Create 2 RADOS pools for Data and MeataData on MDS Node. Refer to the official documents to specify the end number (64 on the example below) ⇒ http://docs.ceph.com/docs/master/rados/operations/placement-groups/ |
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[root@node01 ~]# ceph osd pool create cephfs_data 64 pool 'cephfs_data' created [root@node01 ~]# ceph osd pool create cephfs_metadata 64 pool 'cephfs_metadata' created [root@node01 ~]# ceph fs new cephfs cephfs_metadata cephfs_data new fs with metadata pool 3 and data pool 2 [root@node01 ~]# ceph fs ls name: cephfs, metadata pool: cephfs_metadata, data pools: [cephfs_data ] [root@node01 ~]# ceph mds stat cephfs:1 {0=node01=up:active} [root@node01 ~]# ceph fs status cephfs cephfs - 0 clients ====== +------+--------+--------+---------------+-------+-------+ | Rank | State | MDS | Activity | dns | inos | +------+--------+--------+---------------+-------+-------+ | 0 | active | node01 | Reqs: 0 /s | 10 | 13 | +------+--------+--------+---------------+-------+-------+ +-----------------+----------+-------+-------+ | Pool | type | used | avail | +-----------------+----------+-------+-------+ | cephfs_metadata | metadata | 1536k | 74.9G | | cephfs_data | data | 0 | 74.9G | +-----------------+----------+-------+-------+ +-------------+ | Standby MDS | +-------------+ +-------------+ MDS version: ceph version 14.2.18 (befbc92f3c11eedd8626487211d200c0b44786d9) nautilus (stable) |
| [4] | Mount CephFS on a Client Host. |
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# Base64 encode client key [root@dlp ~]# ceph-authtool -p /etc/ceph/ceph.client.admin.keyring > admin.key [root@dlp ~]# chmod 600 admin.key
mount -t ceph node01.srv.world:6789:/ /mnt -o name=admin,secretfile=admin.key [root@dlp ~]# df -hT Filesystem Type Size Used Avail Use% Mounted on devtmpfs devtmpfs 3.8G 0 3.8G 0% /dev tmpfs tmpfs 3.8G 0 3.8G 0% /dev/shm tmpfs tmpfs 3.8G 8.6M 3.8G 1% /run tmpfs tmpfs 3.8G 0 3.8G 0% /sys/fs/cgroup /dev/mapper/cs-root xfs 26G 2.5G 24G 10% / /dev/vda1 xfs 1014M 322M 693M 32% /boot tmpfs tmpfs 777M 0 777M 0% /run/user/0 10.0.0.51:6789:/ ceph 75G 0 75G 0% /mnt |
| [5] | For delete CephFS or Pools you created, run commands like follows. Data in Pools are all destroyed, so take backups before it if you need. For deleting Pools, it needs to set [mon allow pool delete = true] on [Monitor Daemon] configuration. |
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# delete CephFS [root@node01 ~]# ceph fs rm cephfs --yes-i-really-mean-it
# delete pools # ceph osd pool delete [Pool Name] [Pool Name] *** [root@node01 ~]# ceph osd pool delete cephfs_data cephfs_data --yes-i-really-really-mean-it [root@node01 ~]# ceph osd pool delete cephfs_metadata cephfs_metadata --yes-i-really-really-mean-it |
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