CEPH

Aufbau

Storage-Node

• omar
• nelson
• bay

Admin-Node

• kekistan

Vorbreitung

Installation von ssh und ntp

Auf allen Nodes

• sudo apt -y install ntp ssh
• wget -q -O- 'https://download.ceph.com/keys/release.asc' | apt-key add -
• echo deb http://download.ceph.com/debian-luminous/ $(lsb_release -sc) main | tee /etc/apt/sources.list.d/ceph.list
• apt-get update

ssh-key auf allen nodes

ssh-keygen

• root@kekistand:~# ssh-keygen

ssh-copy-id

• root@kekistand:~# ssh-copy-id nelson
• root@kekistand:~# ssh-copy-id bay
• root@kekistand:~# ssh-copy-id omar

Hilfskript

• cat /usr/local/sbin/root-all-nodes

#!/bin/bash
echo localhost
$*
LIST="bay omar nelson"
for k in $LIST
do
echo $k
ssh k $*
done

Anlegen des Users cephadmin und keyhandling

• root-all-nodes useradd -s /bin/bash -m cephadmin
• sudo -u cephadmin ssh-keygen -q
• root-all-nodes mkdir /home/cephadmin/.ssh
• root-all-nodes chown cephadmin.cephadmin /home/cephadmin/.ssh
• root-all-nodes chmod 700 /home/cephadmin/.ssh
• scp /home/cephadmin/.ssh/id_rsa.pub /tmp
• scp /home/cephadmin/.ssh/id_rsa.pub bay:/tmp
• scp /home/cephadmin/.ssh/id_rsa.pub nelson:/tmp
• scp /home/cephadmin/.ssh/id_rsa.pub omar:/tmp
• root-all-nodes cat /tmp/id_rsa.pub > /home/cephadmin/.ssh/authorized_keys"

Install

• apt install ceph-deploy
• su - cephadmin
• mkdir my-first-ceph-cluster
• cd my-first-ceph-cluster
• ceph-deploy new bay nelson omar
• echo "public network 10.0.0.0/8 >> ceph.conf
• echo "osd pool default size = 2" >> ceph.conf
• ceph-deploy install kekistan bay nelson omar
• ceph-deploy mon create-initial

Vorbereiten der Storages

• ceph-deploy osd prepare bay:/dev/vdb
• ceph-deploy osd prepare nelson:/dev/vda
• ceph-deploy osd prepare omar:/dev/sdb

Aktivieren der Storages

• ceph-deploy osd activate bay:/dev/vdb1
• ceph-deploy osd activate nelson:/dev/vda1
• ceph-deploy osd activate omar:/dev/sdb1

Kopieren der Admin-keyrings

• sudo chmod 644 /etc/ceph/ceph.client.admin.keyring
• ceph-deploy admin kekistan bay nelson oma

Links

• https://linoxide.com/ubuntu-how-to/create-ceph-cluster-ubuntu-16-04/
• https://www.howtoforge.com/tutorial/how-to-install-a-ceph-cluster-on-ubuntu-16-04/