單臺物理機ceph集羣的搭建

1.添加epel-release拓展源

yum install --nogpgcheck -y epel-release

rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7

2.添加ceph源

vi /etc/yum.repos.d/ceph.repo

[Ceph]
name=Ceph packages for $basearch
baseurl=http://mirrors.aliyun.com/ceph/rpm-jewel/el7/$basearch
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=https://mirrors.aliyun.com/ceph/keys/release.asc
priority=1
 
[Ceph-noarch]
name=Ceph noarch packages
baseurl=http://mirrors.aliyun.com/ceph/rpm-jewel/el7/noarch
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=https://mirrors.aliyun.com/ceph/keys/release.asc
priority=1
 
[ceph-source]
name=Ceph source packages
baseurl=http://mirrors.aliyun.com/ceph/rpm-jewel/el7/SRPMS
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=https://mirrors.aliyun.com/ceph/keys/release.asc
priority=1

3.安裝ceph準備

更新主機庫文件:yum update -y

下載ceph-deploy:yum install ceph-deploy -y

下載安裝ntp服務：yum install ntp ntpdate ntp-doc openssh-server yum-plugin-priorities -y

修改/etc/hosts文件，添加IP-主機名映射，例如：192.168.1.111 node1

建立目錄放置ceph安裝後的文件並進入目錄：mkdir my-cluster ; cd my-cluster

使用ceph-deploy建立新的集羣：ceph-deploy new node1（最後爲主機名）

修改ceph.conf配置文件，添加一下內容

osd pool default size = 3  #建立3個副本
public_network = 192.168.1.0/24  #公用網絡
cluster_network = 192.1681.0/24  #集羣網絡

4.ceph-deploy下載安裝ceph程序：ceph-deploy install node1

5.劃分三個大小相等的分區，而且所有大於10GB：例fdisk /dev/sdb

ceph-deploy mon create-initial ceph-deploy admin node1 chmod +r /etc/ceph/ceph.client.admin.keyring ceph-disk prepare --cluster node1 --cluster-uuid f453a207-a05c-475b-971d-91ff6c1f6f48 --fs-type xfs /dev/sdb1 剩餘的兩個分區命令同樣，只須要修改/dev/sdb* 上面的uuid使用ceph -s能夠查看，就是第一行cluster後面的那串字符，配置文件中能夠修改 ceph-disk activate /dev/sdb1 ceph osd getcrushmap -o a.map crushtool -d a.map -o  a vi a rule replicated_ruleset {         ruleset 0         type replicated         min_size 1         max_size 10         step take default         step chooseleaf firstn 0 type osd  #默認爲host，修改成osd         step emit crushtool -c a -o b.map ceph osd setcrushmap -i b.map ceph osd tree ceph -s