一、ceph介绍:
Ceph是一个统一的分布式存储系统,设计初衷是提供较好的性能、可靠性和可扩展性。
Ceph项目最早起源于Sage就读博士期间的工作(最早的成果于2004年发表),并随后贡献给开源社区。在经过了数年的发展之后,目前已得到众多云计算厂商的支持并被广泛应用。RedHat及OpenStack都可与Ceph整合以支持虚拟机镜像的后端存储。
二、Ceph特点
1.高性能
a.摒弃了传统的集中式存储元数据寻址的方案,采用CRUSH算法,数据分布均衡,并行度高。
b.考虑了容灾域的隔离,能够实现各类负载的副本放置规则,例如跨机房、机架感知等。
c.能够支持上千个存储节点的规模,支持TB到PB级的数据。
2.高可用
a.副本数可以灵活控制。
b.支持故障域分隔,数据强一致性。
c.多种故障场景自动进行修复自愈。
d.没有单点故障,自动管理。
3.高可扩展性
a.去中心化。
b.扩展灵活。
c.随着节点增加而线性增加。
4.特性丰富
a.支持三种存储接口:块存储、文件存储、对象存储
b.支持自定义接口,支持多种语言驱动
三、ceph支持三种接口
Object:有原生的API,而且也兼容Swift和S3的API。
Block:支持精简配置、快照、克隆。
File:Posix接口,支持快照。
四、ceph核心组件
1.monitor:一个Ceph集群需要多个Monitor组成的小集群,它们通过Paxos同步数据,用来保存OSD的元数据。
2.OSD:OSD全称Object Storage Device,也就是负责响应客户端请求返回具体数据的进程。一个Ceph集群一般都有很多个OSD
3.MDS:MDS全称Ceph Metadata Server,是CephFS服务依赖的元数据服务。
4.Object:Ceph最底层的存储单元是Object对象,每个Object包含元数据和原始数据。
5.PG:PG全称Placement Grouops,是一个逻辑的概念,一个PG包含多个OSD。引入PG这一层其实是为了更好的分配数据和定位数据。
6.RADOS:RADOS全称Reliable Autonomic Distributed Object Store,是Ceph集群的精华,用户实现数据分配、Failover等集群操作。
7.Libradio:Librados是Rados提供库,因为RADOS是协议很难直接访问,因此上层的RBD、RGW和CephFS都是通过librados访问的,目前提供PHP、Ruby、Java、Python、C和C++支持。
1)基本环境
192.168.111.169 ceph-admin ceph-admin(ceph-deploy) mds1、mon1(也可以将monit节点另放一台机器)
192.168.111.170 ceph-node1 ceph-node1 osd1
192.168.111.172 ceph-node2 ceph-node2 osd2
192.168.111.173 ceph-node3 ceph-node3 osd3
每个节点修改主机名
# hostnamectl set-hostname ceph-admin # hostnamectl set-hostname ceph-node1 # hostnamectl set-hostname ceph-node2 # hostnamectl set-hostname ceph-node3
每个节点绑定主机名映射
cat >>/etc/hosts<<EOF 192.168.111.169 ceph-admin 192.168.111.170 ceph-node1 192.168.111.172 ceph-node2 192.168.111.173 ceph-node3 EOF
每个节点确认连通性
# ping -c 3 ceph-admin
# ping -c 3 ceph-node1
# ping -c 3 ceph-node2
# ping -c 3 ceph-node3
每个节点关闭防火墙和selinux
# systemctl stop firewalld && systemctl disable firewalld && setenforce 0 # systemctl disable firewalld
每个节点安装和配置NTP(官方推荐的是集群的所有节点全部安装并配置 NTP,需要保证各节点的系统时间一致。没有自己部署ntp服务器,就在线同步NTP)
# yum install ntp ntpdate ntp-doc -y # systemctl restart ntpd && systemctl status ntpd # systemctl status ntpd
每个节点准备yum源
删除默认的源,国外的比较慢
# yum clean all # mkdir /mnt/bak # mv /etc/yum.repos.d/* /mnt/bak/
下载阿里云的base源和epel源
# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo # wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo 添加ceph源 # vim /etc/yum.repos.d/ceph.repo [ceph] name=ceph baseurl=http://mirrors.aliyun.com/ceph/rpm-jewel/el7/x86_64/ gpgcheck=0 priority =1 [ceph-noarch] name=cephnoarch baseurl=http://mirrors.aliyun.com/ceph/rpm-jewel/el7/noarch/ gpgcheck=0 priority =1 [ceph-source] name=Ceph source packages baseurl=http://mirrors.aliyun.com/ceph/rpm-jewel/el7/SRPMS gpgcheck=0 priority=1
每个节点创建cephuser用户,设置sudo权限
# useradd -d /home/cephuser -m cephuser # echo "cephuser"|passwd --stdin cephuser # echo "cephuser ALL = (root) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/cephuser # chmod 0440 /etc/sudoers.d/cephuser # sed -i s'/Defaults requiretty/#Defaults requiretty'/g /etc/sudoers
测试cephuser的sudo权限
# su - cephuser $ sudo su -
配置相互间的ssh信任关系
现在ceph-admin节点上产生公私钥文件,然后将ceph-admin节点的.ssh目录拷贝给其他节点
[root@ceph-admin ~]# su - cephuser [cephuser@ceph-admin ~]$ ssh-keygen -t rsa #一路回车 [cephuser@ceph-admin ~]$ cd .ssh/ [cephuser@ceph-admin .ssh]$ ls id_rsa id_rsa.pub [cephuser@ceph-admin .ssh]$ cp id_rsa.pub authorized_keys [cephuser@ceph-admin .ssh]$ scp -r /home/cephuser/.ssh ceph-node1:/home/cephuser/ [cephuser@ceph-admin .ssh]$ scp -r /home/cephuser/.ssh ceph-node2:/home/cephuser/ [cephuser@ceph-admin .ssh]$ scp -r /home/cephuser/.ssh ceph-node3:/home/cephuser/
然后在各节点直接验证cephuser用户下的ssh相互信任关系
$ ssh -p22 cephuser@ceph-admin $ ssh -p22 cephuser@ceph-node1 $ ssh -p22 cephuser@ceph-node2 $ ssh -p22 cephuser@ceph-node3
2)准备磁盘(ceph-node1、ceph-node2、ceph-node3三个节点)
测试时使用的磁盘不要太小,否则后面添加磁盘时会报错,建议磁盘大小为20G及以上。
如下分别在三个节点挂载了一块20G的裸盘
[root@ceph-node1 ~]# fdisk -l /dev/sdb WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion. Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: gpt Disk identifier: DAFD4E71-4772-4325-B3F2-CF89EA64F34A
格式化磁盘(注意:每一个node上面都需要此操作)
$ sudo parted -s /dev/vdb mklabel gpt mkpart primary xfs 0% 100% $ sudo mkfs.xfs /dev/vdb -f
查看磁盘格式(xfs格式)
$ sudo blkid -o value -s TYPE /dev/vdb
3)部署阶段(ceph-admin节点上使用ceph-deploy快速部署)
[root@ceph-admin ~]# su - cephuser 安装ceph-deploy [cephuser@ceph-admin ~]$ sudo yum update -y && sudo yum install ceph-deploy -y [cephuser@ceph-admin ~]$ sudo yum -y install ceph ceph-radosgw (注意:这两个一定要安装;否则后面安装ceph会报错)
创建cluster目录
[cephuser@ceph-admin ~]$ mkdir cluster [cephuser@ceph-admin ~]$ cd cluster/
创建集群(后面填写monit节点的主机名,这里monit节点和管理节点是同一台机器,即ceph-admin)
[cephuser@ceph-admin cluster]$ ceph-deploy new ceph-admin ......... [ceph-admin][DEBUG ] IP addresses found: [u'192.168.111.169'] [ceph_deploy.new][DEBUG ] Resolving host ceph-admin [ceph_deploy.new][DEBUG ] Monitor ceph-admin at 192.168.111.169 [ceph_deploy.new][DEBUG ] Monitor initial members are ['ceph-admin'] [ceph_deploy.new][DEBUG ] Monitor addrs are ['192.168.111.169'] [ceph_deploy.new][DEBUG ] Creating a random mon key... [ceph_deploy.new][DEBUG ] Writing monitor keyring to ceph.mon.keyring... [ceph_deploy.new][DEBUG ] Writing initial config to ceph.conf... 修改ceph.conf文件(注意:mon_host必须和public network 网络是同网段内!) [cephuser@ceph-admin cluster]$ vim ceph.conf #添加下面两行配置内容 ...... public network = 192.168.111.169/24 osd pool default size = 3 安装ceph(过程有点长,需要等待一段时间....) [cephuser@ceph-admin cluster]$ ceph-deploy install ceph-admin ceph-node1 ceph-node2 ceph-node3 初始化monit监控节点,并收集所有密钥 [cephuser@ceph-admin cluster]$ ceph-deploy mon create-initial [cephuser@ceph-admin cluster]$ ceph-deploy gatherkeys ceph-admin
添加OSD到集群
检查OSD节点上所有可用的磁盘
[cephuser@ceph-admin cluster]$ ceph-deploy disk list ceph-node1 ceph-node2 ceph-node3
使用zap选项删除所有osd节点上的分区
[cephuser@ceph-admin cluster]$ ceph-deploy disk zap ceph-node1:/dev/sdb ceph-node2:/dev/sdb ceph-node3:/dev/sdb
准备OSD(使用prepare命令)
[cephuser@ceph-admin cluster]$ ceph-deploy osd prepare ceph-node1:/dev/sdb ceph-node2:/dev/sdb ceph-node3:/dev/sdb
活OSD(注意由于ceph对磁盘进行了分区,/dev/sdb磁盘分区为/dev/sdb1)
[cephuser@ceph-admin cluster]$ ceph-deploy osd activate ceph-node1:/dev/sdb1 ceph-node2:/dev/sdb1 ceph-node3:/dev/sdb1 可能会出现下面的报错: [ceph-node1][WARNIN] ceph_disk.main.Error: Error: /dev/vdb1 is not a directory or block device [ceph-node1][ERROR ] RuntimeError: command returned non-zero exit status: 1 [ceph_deploy][ERROR ] RuntimeError: Failed to execute command: /usr/sbin/ceph-disk -v activate --mark-init systemd --mount /dev/vdb1 但是这个报错没有影响ceph的部署,在三个osd节点上通过命令已显示磁盘已成功mount [root@ceph-node1 ~]# fdisk -l /dev/sdb WARNING: fdisk GPT support is currently new, and therefore in an experimental phase. Use at your own discretion. Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk label type: gpt Disk identifier: DAFD4E71-4772-4325-B3F2-CF89EA64F34A # Start End Size Type Name 1 10487808 41943006 15G Ceph OSD ceph data 2 2048 10487807 5G Ceph Journal ceph journal [root@ceph-node1 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 40G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 39G 0 part ├─centos-root 253:0 0 37G 0 lvm / └─centos-swap 253:1 0 2G 0 lvm [SWAP] sdb 8:16 0 20G 0 disk ├─sdb1 8:17 0 15G 0 part /var/lib/ceph/osd/ceph-0 #挂在成功 └─sdb2 8:18 0 5G 0 part [root@ceph-node2 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 40G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 39G 0 part ├─centos-root 253:0 0 37G 0 lvm / └─centos-swap 253:1 0 2G 0 lvm [SWAP] sdb 8:16 0 20G 0 disk ├─sdb1 8:17 0 15G 0 part /var/lib/ceph/osd/ceph-1 └─sdb2 8:18 0 5G 0 part sr0 11:0 1 4.3G 0 rom [root@ceph-node2 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 40G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 39G 0 part ├─centos-root 253:0 0 37G 0 lvm / └─centos-swap 253:1 0 2G 0 lvm [SWAP] sdb 8:16 0 20G 0 disk ├─sdb1 8:17 0 15G 0 part /var/lib/ceph/osd/ceph-1 #挂在成功 └─sdb2 8:18 0 5G 0 part sr0 11:0 1 4.3G 0 rom [root@ceph-node3 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 40G 0 disk ├─sda1 8:1 0 1G 0 part /boot └─sda2 8:2 0 39G 0 part ├─centos-root 253:0 0 37G 0 lvm / └─centos-swap 253:1 0 2G 0 lvm [SWAP] sdb 8:16 0 20G 0 disk ├─sdb1 8:17 0 15G 0 part /var/lib/ceph/osd/ceph-2 #挂在成功 └─sdb2 8:18 0 5G 0 part sr0 11:0 1 4.3G 0 rom
查看OSD:
[cephuser@ceph-admin cluster]$ ceph-deploy disk list ceph-node1 ceph-node2 ceph-node3 ........ [ceph-node1][DEBUG ] /dev/sdb2 ceph journal, for /dev/sdb1 #如下显示这两个分区,则表示成功了 [ceph-node1][DEBUG ] /dev/sdb1 ceph data, active, cluster ceph, osd.0, journal /dev/sdb2 ........ ........ [ceph-node2][DEBUG ] /dev/sdb2 ceph journal, for /dev/sdb1 [ceph-node2][DEBUG ] /dev/sdb1 ceph data, active, cluster ceph, osd.1, journal /dev/sdb2 ........ ........ [ceph-node3][DEBUG ] /dev/sdb2 ceph journal, for /dev/sdb1 [ceph-node3][DEBUG ] /dev/sdb1 ceph data, active, cluster ceph, osd.2, journal /dev/sdb2 ........ 用ceph-deploy把配置文件和admin密钥拷贝到管理节点和Ceph节点,这样你每次执行Ceph命令行时就无需指定monit节点地址 和ceph.client.admin.keyring了 [cephuser@ceph-admin cluster]$ ceph-deploy admin ceph-admin ceph-node1 ceph-node2 ceph-node3
修改密钥权限
[cephuser@ceph-admin cluster]$ sudo chmod 644 /etc/ceph/ceph.client.admin.keyring
检查ceph状态
[cephuser@ceph-admin cluster]$ sudo ceph health HEALTH_OK [cephuser@ceph-admin cluster]$ sudo ceph -s cluster 33bfa421-8a3b-40fa-9f14-791efca9eb96 health HEALTH_OK monmap e1: 1 mons at {ceph-admin=192.168.10.220:6789/0} election epoch 3, quorum 0 ceph-admin osdmap e14: 3 osds: 3 up, 3 in flags sortbitwise,require_jewel_osds pgmap v29: 64 pgs, 1 pools, 0 bytes data, 0 objects 100 MB used, 45946 MB / 46046 MB avail 64 active+clean
查看ceph osd运行状态
[cephuser@ceph-admin ~]$ ceph osd stat osdmap e19: 3 osds: 3 up, 3 in flags sortbitwise,require_jewel_osds
查看osd的目录树
[cephuser@ceph-admin ~]$ ceph osd tree ID WEIGHT TYPE NAME UP/DOWN REWEIGHT PRIMARY-AFFINITY -1 0.04376 root default -2 0.01459 host ceph-node1 0 0.01459 osd.0 up 1.00000 1.00000 -3 0.01459 host ceph-node2 1 0.01459 osd.1 up 1.00000 1.00000 -4 0.01459 host ceph-node3 2 0.01459 osd.2 up 1.00000 1.00000
查看monit监控节点的服务情况
[cephuser@ceph-admin cluster]$ sudo systemctl status ceph-mon@ceph-admin [cephuser@ceph-admin cluster]$ ps -ef|grep ceph|grep 'cluster' ceph 28190 1 0 11:44 ? 00:00:01 /usr/bin/ceph-mon -f --cluster ceph --id ceph-admin --setuser ceph --setgroup ceph 分别查看下ceph-node1、ceph-node2、ceph-node3三个节点的osd服务情况,发现已经在启动中。 [cephuser@ceph-node1 ~]$ sudo systemctl status ceph-osd@0.service #启动是start、重启是restart [cephuser@ceph-node1 ~]$ sudo ps -ef|grep ceph|grep "cluster" ceph 28749 1 0 11:44 ? 00:00:00 /usr/bin/ceph-osd -f --cluster ceph --id 0 --setuser ceph --setgroup ceph cephuser 29197 29051 0 11:54 pts/2 00:00:00 grep --color=auto cluster [cephuser@ceph-node2 ~]$ sudo systemctl status ceph-osd@1.service [cephuser@ceph-node2 ~]$ sudo ps -ef|grep ceph|grep "cluster" ceph 28749 1 0 11:44 ? 00:00:00 /usr/bin/ceph-osd -f --cluster ceph --id 0 --setuser ceph --setgroup ceph cephuser 29197 29051 0 11:54 pts/2 00:00:00 grep --color=auto cluster [cephuser@ceph-node3 ~]$ sudo systemctl status ceph-osd@2.service [cephuser@ceph-node3 ~]$ sudo ps -ef|grep ceph|grep "cluster" ceph 28749 1 0 11:44 ? 00:00:00 /usr/bin/ceph-osd -f --cluster ceph --id 0 --setuser ceph --setgroup ceph cephuser 29197 29051 0 11:54 pts/2 00:00:00 grep --color=auto cluster
4)创建文件系统
先查看管理节点状态,默认是没有管理节点的。
[cephuser@ceph-admin ~]$ ceph mds stat e1:
创建管理节点(ceph-admin作为管理节点)。
需要注意:如果不创建mds管理节点,client客户端将不能正常挂载到ceph集群!!
[cephuser@ceph-admin ~]$ pwd /home/cephuser [cephuser@ceph-admin ~]$ cd cluster/ [cephuser@ceph-admin cluster]$ ceph-deploy mds create ceph-admin
再次查看管理节点状态,发现已经在启动中
[cephuser@ceph-admin cluster]$ ceph mds stat e2:, 1 up:standby cephuser@ceph-admin cluster]$ sudo systemctl status ceph-mds@ceph-admin [cephuser@ceph-admin cluster]$ ps -ef|grep cluster|grep ceph-mds ceph 29093 1 0 12:46 ? 00:00:00 /usr/bin/ceph-mds -f --cluster ceph --id ceph-admin --setuser ceph --setgroup ceph
创建pool,pool是ceph存储数据时的逻辑分区,它起到namespace的作用
[cephuser@ceph-admin cluster]$ ceph osd lspools #先查看pool 0 rbd,
新创建的ceph集群只有rdb一个pool。这时需要创建一个新的pool
[cephuser@ceph-admin cluster]$ ceph osd pool create cephfs_data 10 #后面的数字是PG的数量 pool 'cephfs_data' created [cephuser@ceph-admin cluster]$ ceph osd pool create cephfs_metadata 10 #创建pool的元数据 pool 'cephfs_metadata' created [cephuser@ceph-admin cluster]$ ceph fs new myceph cephfs_metadata cephfs_data new fs with metadata pool 2 and data pool 1
再次查看pool状态
[cephuser@ceph-admin cluster]$ ceph osd lspools 0 rbd,1 cephfs_data,2 cephfs_metadata,
检查mds管理节点状态
[cephuser@ceph-admin cluster]$ ceph mds stat e5: 1/1/1 up {0=ceph-admin=up:active}
查看ceph集群状态
[cephuser@ceph-admin cluster]$ sudo ceph -s cluster 33bfa421-8a3b-40fa-9f14-791efca9eb96 health HEALTH_OK monmap e1: 1 mons at {ceph-admin=192.168.10.220:6789/0} election epoch 3, quorum 0 ceph-admin fsmap e5: 1/1/1 up {0=ceph-admin=up:active} #多了此行状态 osdmap e19: 3 osds: 3 up, 3 in flags sortbitwise,require_jewel_osds pgmap v48: 84 pgs, 3 pools, 2068 bytes data, 20 objects 101 MB used, 45945 MB / 46046 MB avail 84 active+clean
查看ceph集群端口
[cephuser@ceph-admin cluster]$ sudo lsof -i:6789 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME ceph-mon 54344 ceph 10u IPv4 87460 0t0 TCP ceph-admin:smc-https (LISTEN) ceph-mon 54344 ceph 19u IPv4 89724 0t0 TCP ceph-admin:smc-https->ceph-node1:42196 (ESTABLISHED) ceph-mon 54344 ceph 20u IPv4 89747 0t0 TCP ceph-admin:smc-https->ceph-node2:35390 (ESTABLISHED) ceph-mon 54344 ceph 21u IPv4 89801 0t0 TCP ceph-admin:smc-https->ceph-node3:56818 (ESTABLISHED) ceph-mon 54344 ceph 22u IPv4 90813 0t0 TCP ceph-admin:smc-https->ceph-admin:42070 (ESTABLISHED) ceph-mds 55257 ceph 8u IPv4 90812 0t0 TCP ceph-admin:42070->ceph-admin:smc-https (ESTABLISHED
5)client端挂载ceph存储有两种方式:内核kernal方式和fuse方式。(采用fuse方式)
安装ceph-fuse(这里的客户机是centos7系统) yum install -y ceph-fuse yum install -y ceph (注意:需要创建ceph的镜像仓库,前面有说明这里省略) 创建挂载目录 (目录可以自己定义) [root@localhost cephfs]# mkdir /cephfs
复制配置文件
将ceph配置文件ceph.conf从管理节点copy到client节点(192.168.111.169为管理节点) [root@centos6-02 ~]# rsync -e "ssh -p22" -avpgolr root@192.168.111.169:/etc/ceph/ceph.conf /etc/ceph/ 或者 [root@centos6-02 ~]# rsync -e "ssh -p22" -avpgolr root@192.168.111.169:/home/cephuser/cluster/ceph.conf /etc/ceph/ #两个路径下的文件内容一样
复制密钥:
将ceph的ceph.client.admin.keyring从管理节点copy到client节点 [root@centos6-02 ~]# rsync -e "ssh -p22" -avpgolr root@192.168.111.169:/etc/ceph/ceph.client.admin.keyring /etc/ceph/ 或者 [root@centos6-02 ~]# rsync -e "ssh -p22" -avpgolr root@192.168.111.169:/home/cephuser/cluster/ceph.client.admin.keyring /etc/ceph/
查看ceph授权
[root@localhost cephfs]# ceph auth list installed auth entries: mds.ceph-admin key: AQBC99de+2vvJxAAkTIeWDwg6Swy6ZXFWPXSQA== caps: [mds] allow caps: [mon] allow profile mds caps: [osd] allow rwx osd.0 key: AQC39dde9KIoGRAA3zH8vLUDQAehO2otptUi+g== caps: [mon] allow profile osd caps: [osd] allow * osd.1 key: AQDB9ddevzfzARAADHvV8zEKrj4i16KaNLNpaA== caps: [mon] allow profile osd caps: [osd] allow * osd.2 key: AQDL9ddeqFDQABAAS3YsdBlI1h/65PblGdxQIw== caps: [mon] allow profile osd caps: [osd] allow * client.admin key: AQAs89depA23NRAA8yEg0GfHNC/uhKU9jsgp6Q== caps: [mds] allow * caps: [mon] allow * caps: [osd] allow * client.bootstrap-mds key: AQAt89deGBojEhAAQnJZJF6t2NWzbHqF+90uTg== caps: [mon] allow profile bootstrap-mds client.bootstrap-mgr key: AQAv89des+hAKRAA7j+g8C5dmT3FmwkXIZxo6A== caps: [mon] allow profile bootstrap-mgr client.bootstrap-osd key: AQAt89deWm+XARAAXoLvLk+wLuFuW0kxRY71Ug== caps: [mon] allow profile bootstrap-osd client.bootstrap-rgw key: AQAt89deUmHoCRAAM673iqqNXnl2CWfEiqjXfA== caps: [mon] allow profile bootstrap-rgw
将ceph集群存储挂载到客户机的/cephfs目录下
[root@centos6-02 ~]# ceph-fuse -m 192.168.111.169:6789 /cephfs 2018-06-06 14:28:54.149796 7f8d5c256760 -1 init, newargv = 0x4273580 newargc=11 ceph-fuse[16107]: starting ceph client ceph-fuse[16107]: starting fuse [root@localhost cephfs]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 37G 11G 27G 29% / devtmpfs 898M 0 898M 0% /dev tmpfs 910M 0 910M 0% /dev/shm tmpfs 910M 9.9M 900M 2% /run tmpfs 910M 0 910M 0% /sys/fs/cgroup /dev/sda1 1014M 146M 869M 15% /boot overlay 37G 11G 27G 29% /var/lib/docker/overlay2/c3ac65ba11100c5858359d15edc307d3b455afb08175663914802a072a4d0b09/merged overlay 37G 11G 27G 29% /var/lib/docker/overlay2/9751f3631e8d12b0703a29c4a3e5bac771c1ca71980f7d6a6b39c6cf3eb71784/merged overlay 37G 11G 27G 29% /var/lib/docker/overlay2/7c2135cd02ab24d6e286880c27cb3c49f34d9f441a3ffa28fd21bacf486244ab/merged overlay 37G 11G 27G 29% /var/lib/docker/overlay2/1993a1b68f0b167b1fc497a064e9706868bde205431e597e203e2618abfeddff/merged overlay 37G 11G 27G 29% /var/lib/docker/overlay2/b6f141003953ca7f4262fa6cbbf69b4d3a4d71f9d38909339b285882d916b58e/merged shm 64M 0 64M 0% /var/lib/docker/containers/0a52f68a5ffc5b949d1a840fff812d95117964495d71a644506eb0803f5659c2/mounts/shm shm 64M 0 64M 0% /var/lib/docker/containers/62e1c7ecf7a15a1ab1e38450b1c944caafac3f23975d4ac88c60e1548f7512ef/mounts/shm shm 64M 0 64M 0% /var/lib/docker/containers/c29123fffc4215165a89b63aec8159df90063a307edbcdf0af23b604c7ccb924/mounts/shm shm 64M 0 64M 0% /var/lib/docker/containers/04394b89ab39ae42de6020e37ba751aef42064cb78402b16459594d2c15f4160/mounts/shm shm 64M 0 64M 0% /var/lib/docker/containers/80ba82504c2ef0cacfa0797d679a36ec946adad524bc498e921521a395ed81ca/mounts/shm tmpfs 182M 0 182M 0% /run/user/0 ceph-fuse 45G 324M 45G 1% /cephfs overlay 37G 11G 27G 29% /var/lib/docker/overlay2/a4cfb7152ca48da3af7558425d91484952a049f12f7c79e0febb131e5bafda65/merged shm 64M 0 64M 0% /var/lib/docker/containers/be0bfff9927041ad68f9427e7566160eae92f38190eb08c3ca69b20c45623d3a/mounts/shm
由上面可知,已经成功挂载了ceph存储,三个osd节点,每个节点有15G(在节点上通过"lsblk"命令可以查看ceph data分区大小),一共45G!
取消ceph存储的挂载
[root@centos6-02 ~]# umount /cephfs
优化:
PG Number
PG和PGP数量一定要根据OSD的数量进行调整,计算公式如下,但是最后算出的结果一定要接近或者等于一个2的指数。
Total PGs = (Total_number_of_OSD * 100) / max_replication_count
例如15个OSD,副本数为3的情况下,根据公式计算的结果应该为500,最接近512,所以需要设定该pool(volumes)的pg_num和pgp_num都为512.
ceph osd pool set volumes pg_num 512
ceph osd pool set volumes pgp_num 512