ceph集群安装

所有 Ceph 部署都始于 Ceph 存储集群。一个 Ceph 集群可以包含数千个存储节点，最简系统至少需要一个监视器和两个 OSD 才能做到数据复制。Ceph 文件系统、 Ceph 对象存储、和 Ceph 块设备从 Ceph 存储集群读出和写入数据。

Ceph架构图

1、集群配置

节点	IP	功能
ceph01	172.16.100.5	deploy,mon,osd*2,mds
ceph02	172.16.100.6	mon,osd*2
ceph03	172.16.100.7	mon,osd*2

2、系统版本

#cat /etc/redhat-release CentOS Linux release 7.3.1611 (Core)

3、三个节点分别额外挂载两块20G磁盘

#lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT fd0 2:0 1 4K 0 disk sda 8:0 0 20G 0 disk ├─sda1 8:1 0 476M 0 part /boot └─sda2 8:2 0 19.5G 0 part / sdb 8:16 0 20G 0 disk sdc 8:32 0 23G 0 disk sr0 11:0 1 1024M 0 rom

4、关闭防火墙

#vim /etc/selinux/config disabled #setenforce 0 #systemctl stop firewalld #systemctl disable firewalld

5、添加hosts

#vim /etc/hosts 172.16.100.5 ceph01 172.16.100.6 ceph02 172.16.100.7 ceph03

6、配置SSH免密登陆

#ssh-keygen #ssh-copy-id ceph01 #ssh-copy-id ceph02 #ssh-copy-id ceph03

7、校对时间

#yum install -y ntp ntpdate #ntpdate pool.ntp.org

8、添加yum源

#vim /etc/yum.repos.d/ceph.repo [ceph] name=Ceph packages for $basearch baseurl=http://download.ceph.com/rpm-jewel/el7/$basearch enabled=1 priority=2 gpgcheck=1 type=rpm-md gpgkey=https://download.ceph.com/keys/release.asc [ceph-noarch] name=Ceph noarch packages baseurl=http://download.ceph.com/rpm-jewel/el7/noarch enabled=1 priority=2 gpgcheck=1 type=rpm-md gpgkey=https://download.ceph.com/keys/release.asc [ceph-source] name=Ceph source packages baseurl=http://download.ceph.com/rpm-jewel/el7/SRPMS enabled=0 priority=2 gpgcheck=1 type=rpm-md gpgkey=https://download.ceph.com/keys/release.asc

8、导入密钥

#rpm --import 'https://download.ceph.com/keys/release.asc'

9、安装ceph客户端

#yum install -y ceph ceph-radosgw rdate

10、安装 ceph-deploy

#yum update -y #yum install -y ceph-deploy

11、创建集群

#mkdir -pv /opt/cluster #cd /opt/cluster #ceph-deploy new ceph01 ceph02 ceph03 #ls ceph.conf ceph-deploy-ceph.log ceph.mon.keyring

12、修改配置文件，添加public_network，并稍微增大mon之间时差允许范围（默认为0.05s，现改为2s）

#vim ceph.conf [global] fsid = 79aa9d8d-65e4-4a9d-84c4-50dbd3db337e mon_initial_members = ceph01, ceph02 mon_host = 192.168.135.163,192.168.135.164 auth_cluster_required = cephx auth_service_required = cephx auth_client_required = cephx public_network = 172.16.100.0/24 mon_clock_drift_allowed = 2

13、部署MON

#ceph-deploy mon create-initial #ceph -s cluster 6fb69a7a-647a-4cb6-89ad-583729eb0406 health HEALTH_ERR no osds monmap e1: 3 mons at {ceph01=172.16.100.5:6789/0,ceph02=172.16.100.6:6789/0,ceph03=172.16.100.7:6789/0} election epoch 8, quorum 0,1,2 ceph01,ceph02,ceph03 osdmap e1: 0 osds: 0 up, 0 in flags sortbitwise,require_jewel_osds pgmap v2: 64 pgs, 1 pools, 0 bytes data, 0 objects 0 kB used, 0 kB / 0 kB avail 64 creating

14、部署OSD

#ceph-deploy disk zap ceph01:sdb ceph01:sdc #ceph-deploy disk zap ceph02:sdb ceph02:sdc #ceph-deploy disk zap ceph03:sdb ceph03:sdc #ceph-deploy osd prepare ceph01:sdb:sdc #ceph-deploy osd prepare ceph02:sdb:sdc #ceph-deploy osd prepare ceph03:sdb:sdc #ceph-deploy osd activate ceph01:sdb1:sdc1 #ceph-deploy osd activate ceph02:sdb1:sdc1 #ceph-deploy osd activate ceph03:sdb1:sdc1 #lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT fd0 2:0 1 4K 0 disk sda 8:0 0 20G 0 disk ├─sda1 8:1 0 476M 0 part /boot └─sda2 8:2 0 19.5G 0 part / sdb 8:16 0 20G 0 disk └─sdb1 8:17 0 20G 0 part /var/lib/ceph/osd/ceph-0 sdc 8:32 0 23G 0 disk └─sdc1 8:33 0 5G 0 part sr0 11:0 1 1024M 0 rom

15、再次查看集群状态，如果是active+clean状态就是正常的。

#ceph -s cluster 6fb69a7a-647a-4cb6-89ad-583729eb0406 health HEALTH_OK monmap e1: 3 mons at {ceph01=172.16.100.5:6789/0,ceph02=172.16.100.6:6789/0,ceph03=172.16.100.7:6789/0} election epoch 8, quorum 0,1,2 ceph01,ceph02,ceph03 osdmap e15: 3 osds: 3 up, 3 in flags sortbitwise,require_jewel_osds pgmap v32: 64 pgs, 1 pools, 0 bytes data, 0 objects 101 MB used, 61305 MB / 61406 MB avail 64 active+clean