Ceph : Configure Cluster2018/12/25 |
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Install Distributed File System Ceph to Configure Storage Cluster.
For example on here, Configure Cluster with 1 admin Node and 3 Storage Node like follows.
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+--------------------+ | +--------------------+
| [dlp.srv.world] |10.0.0.30 | 10.0.0.x| [client.srv.world] |
| Ceph-Deploy +-----------+-----------+ |
| | | | |
+--------------------+ | +--------------------+
+----------------------------+----------------------------+
| | |
|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 | | | | |
| | | | | |
+-----------------------+ +-----------------------+ +-----------------------+
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| [1] |
Add a user for Ceph admin on all Nodes.
It adds [ubuntu] user on this exmaple. |
| [2] | Grant root priviledge to Ceph admin user just added above with sudo settings. And also install required packages. |
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root@dlp:~#
root@dlp:~# apt -y install openssh-server python-ceph echo -e 'Defaults:ubuntu !requiretty\nubuntu ALL = (root) NOPASSWD:ALL' | tee /etc/sudoers.d/ceph root@dlp:~# chmod 440 /etc/sudoers.d/ceph |
| [3] | Login as a Ceph admin user and configure Ceph. Create SSH key-pair on Ceph Admin Node and send public-key to all storage Nodes. |
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ubuntu@dlp:~$ ssh-keygen Generating public/private rsa key pair. Enter file in which to save the key (/home/ubuntu/.ssh/id_rsa): Created directory '/home/ubuntu/.ssh'. Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /home/ubuntu/.ssh/id_rsa. Your public key has been saved in /home/ubuntu/.ssh/id_rsa.pub. The key fingerprint is: SHA256:HJArjy33ATN7IvhbND2lfPQ7APZ1Av/hEy1qHg6gcE8 ubuntu@dlp.srv.world The key's randomart image is:
ubuntu@dlp:~$
vi ~/.ssh/config # create new ( define all nodes and users )
Host dlp
Hostname dlp.srv.world
User ubuntu
Host node01
Hostname node01.srv.world
User ubuntu
Host node02
Hostname node02.srv.world
User ubuntu
Host node03
Hostname node03.srv.world
User ubuntu
ubuntu@dlp:~$
chmod 600 ~/.ssh/config # transfer public-key ubuntu@dlp:~$ ssh-copy-id node01 ubuntu@node01.srv.world's password: Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'node01'" and check to make sure that only the key(s) you wanted were added.ubuntu@dlp:~$ ssh-copy-id node02 ubuntu@dlp:~$ ssh-copy-id node03 |
| [5] | Install Ceph to all Nodes from Admin Node. |
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ubuntu@dlp:~/ceph$
ceph-deploy new node01
# install Ceph on each Node ubuntu@dlp:~/ceph$ ceph-deploy install dlp node01 node02 node03
# settings for monitoring and keys ubuntu@dlp:~/ceph$ ceph-deploy mon create-initial
# configure manager node ubuntu@dlp:~/ceph$ ceph-deploy mgr create node01
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| [6] | Configure Ceph Cluster from Admin Node. |
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# prepare Object Storage Daemon ubuntu@dlp:~/ceph$ ceph-deploy osd prepare node01:/var/lib/ceph/osd node02:/var/lib/ceph/osd node03:/var/lib/ceph/osd
# activate Object Storage Daemon ubuntu@dlp:~/ceph$ ceph-deploy osd activate node01:/var/lib/ceph/osd node02:/var/lib/ceph/osd node03:/var/lib/ceph/osd
# transfer config files ubuntu@dlp:~/ceph$ ceph-deploy admin dlp node01 node02 node03 # show status (no ploblem if HEALTH_OK) ubuntu@dlp:~/ceph$ sudo ceph status
cluster:
id: 8166a55f-be6a-41f4-ad8d-4f8b68cac788
health: HEALTH_OK
services:
mon: 1 daemons, quorum node01
mgr: node01(active)
osd: 3 osds: 3 up, 3 in
data:
pools: 0 pools, 0 pgs
objects: 0 objects, 0 bytes
usage: 3077 MB used, 27642 MB / 30720 MB avail
pgs:
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| [7] | By the way, if you'd like to clean settings and re-configure again, do like follows. |
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# remove packages ubuntu@dlp:~/ceph$ ceph-deploy purge dlp node01 node02 node03
# remove settings ubuntu@dlp:~/ceph$ ceph-deploy purgedata dlp node01 node02 node03 ubuntu@dlp:~/ceph$ ceph-deploy forgetkeys
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