Ceph(http://ceph.com)最近還滿熱門的,小弟今天來分享一下如何快速部署, 先介紹一下Ceph是新一代的分散式儲存系統,Ceph提供Object storage, Block device storage,File system的服務（Ceph的File system還不穩請勿用 於生產環境）,今天將介紹Block device storage的部分. 組件簡介： osd: Object Storage Device, 負責提供儲存資源 monitor: 監控Ceph Cluster狀態 mds: 儲存Cephfs 的元數據, 非必要支組件, 只有Cephfs需要此組件 實驗環境共４台伺服器 1台Ceph-deploy,3台OSD+MON,每台主機都有兩顆硬碟, 代號sda,sdb sda用來安裝作業系統 作業系統：ubuntu 14.04 |Hostname |Ip address |Role | |__________|_____________|_________| |ceph-admin|192.168.60.1 |admin | |ceph-1 |192.168.60.2 |mon+osd | |ceph-2 |192.168.60.3 |mon+osd | |ceph-3 |192.168.60.4 |mon+osd | |__________________________________| 步驟一：修改4台主機的/etc/hosts 192.168.60.1 ceph-admin 192.168.60.2 ceph-1 192.168.60.3 ceph-2 192.168.60.4 ceph-3 步驟二：產生ssh密鑰,並複製到其他node ceph-admin#ssh-keygen ceph-admin#ssh-copy-id ceph-1 ceph-admin#ssh-copy-id ceph-2 ceph-admin#ssh-copy-id ceph-3 步驟三：在admin上增加cepg apt repo ceph-admin#wget -q -O- 'https://ceph.com/git/?p=ceph.git;a=blob_plain;f=keys /release.asc' | sudo apt-key add - ceph-admin#echo deb echo deb http://ceph.com/debian-firefly/ $(lsb_release -sc) main | sudo tee /etc/apt/sources.list.d/ceph.list ceph-admin#apt-get update && apt-get install ceph-deploy 步驟四：部署 以下動作依然都是在ceph-admin上完成 (1)建立工作目錄 ceph-admin#mkdir ~/ceph && cd ~/ceph (2)建立Cluster,預設cluster名稱為ceph ceph-admin#ceph-deploy new ceph-1 ceph-2 ceph-3 (3)在所有node上安裝ceph套件 ceph-admin#ceph-deploy install ceph-1 ceph-2 ceph-3 (4)建立mon ceph-admin#ceph-deploy mon create ceph-1 ceph-2 ceph-3 (5)將所有node的密鑰都複製到工作目錄 ceph-admin#ceph-deploy gatherkeys ceph-1 ceph-2 ceph-3 (6)增加osd ceph-admin#ceph-deploy prepare ceph-1:/dev/sdb ceph-2:/dev/sdb ceph-3:/dev/sdb ceph-admin#ceph-deploy activate ceph-1:/dev/sdb ceph-2:/dev/sdb ceph-3:/dev/sdb (7)複製admin密鑰到所有node ceph-admin#ceph-deploy admin ceph-1 ceph-2 ceph-3 (8)最後檢查部署狀態 ceph-1#ceph health HEALTH_OK 出現HEALTH_OK代表cluster運作正常 步驟五：掛載block device (1)掛載rbd內核模組 ceph-client#modprobe rbd (2)建立一個4G的image ceph-client#rbd create --size 4096 test (3)將test這個image map到rbd pool ceph-client#rbd map test --pool rbd (4)接著就能愉快地使用block device ceph-client#mkfs.ext4 /dev/rbd/rbd/test ceph-client#mount /dev/rbd/rbd/test /rbd 我是結合Cloudstack使用,將Ceph作為VM 硬碟的儲存 http://ppt.cc/jtGG --

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