利用ceph-deploy部署ceph存储集群
创建两台主机，ip地址和主机名如下
192.168.2.100，主机名ceph-1
192.168.2.101，主机名ceph-2
每个主机 新增加一块数据盘，分区根据自己需要分区即可，这里分了4个分区。
ceph部署至少两个两个节点，数据盘或者分区至少三个。
ceph-1节点作为部署节点执行部署操作。
1、添加yum源
vim /etc/yum.repos.d/ceph.repo
[Ceph]
name=Ceph packages for $basearch
baseurl=http://mirrors.aliyun.com/ceph/rpm-infernalis/el7/$basearch
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=http://mirrors.aliyun.com/ceph/keys/release.asc
priority=1
[Ceph-noarch]
name=Ceph noarch packages
baseurl=http://mirrors.aliyun.com/ceph/rpm-infernalis/el7/noarch
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=http://mirrors.aliyun.com/ceph/keys/release.asc
priority=1
[ceph-source]
name=Ceph source packages
baseurl=http://mirrors.aliyun.com/ceph/rpm-infernalis/el7/SRPMS
enabled=1
gpgcheck=1
type=rpm-md
gpgkey=http://mirrors.aliyun.com/ceph/keys/release.asc
priority=1
2、主机名解析
vim /etc/hosts
192.168.2.100 ceph-1
192.168.2.101 ceph-2
3、NTP时间同步
vim /etc/chrony.conf
allow 192.168.2.0/16
local stratum 10
systemctl restart chronyd
systemctl enable chronyd
chronyc sources -v
4、免密登陆
ssh-keygen
ssh-copy-id ceph-1
ssh-copy-id ceph-2
5、磁盘分区格式化
fdisk /dev/sdb
mkfs.xfs /dev/sdb1
5、安装ceph-deploy
yum install ceph-deploy -y
6、新建集群，生成配置文件
mkdir ceph-cluster && cd ceph-cluster
ceph-deploy new ceph-1 ceph-2
7、修改ceph-cluster/ceph.conf
#添加网络地址
public_network= 192.168.2.0/24
#副本pg数为2，默认为3，最小工作size为默认size - (默认size/2)
osd pool default size = 2
#官方建议平均每个osd 的pg数量不小于30，即pg num > (osd_num) * 30 / 2(副本数)
osd pool default pg num = 1024
osd pool default pgp num = 1024
8、安装ceph软件包
ceph-deploy install ceph-1 ceph-2
#或者每个节点安装
yum -y install ceph ceph-radosgw
9、传送ceph.conf
ceph-deploy --overwrite-conf config push ceph-1 ceph-2
10、查看各节点磁盘
ceph-deploy disk list ceph-1 ceph-2
11、初始化mon节点
ceph-deploy mon create-initial
如果报错：RuntimeError: config file /etc/ceph/ceph.conf exists with different content; use --overwrite-conf to overwrite，执行如下命令后再执行上述命令
ceph-deploy --overwrite-conf mon create ceph{3,1,2}
ceph -s # 查看mon是否添加成功
12、配置admin key 到每个节点
ceph-deploy admin ceph-1 ceph-2
13、添加osd
ceph-deploy --overwrite-conf osd prepare ceph-1:sdb1 ceph-1:sdb2 ceph-1:sdb3 ceph-1:sdb4 ceph-2:sdc1 ceph-2:sdc2 ceph-2:sdc3 ceph-2:sdc4
ceph-deploy --overwrite-conf osd activate ceph-1:sdb1 ceph-1:sdb2 ceph-1:sdb3 ceph-1:sdb4 ceph-2:sdc1 ceph-2:sdc2 ceph-2:sdc3 ceph-2:sdc4
清理环境
ceph-deploy purge ceph-1 ceph-2
ceph-deploy purgedata ceph-1 ceph-2
ceph-deploy forgetkeys
rm -f ceph.*
