Centos7.5 下使用Ceph-deploy快速部署Ceph分布式存储

第一步:基本环境

192.168.10.220    ceph-admin（ceph-deploy）   mds1、mon1（也可以将monit节点另放一台机器）

192.168.10.239    ceph-node1                  osd1  

192.168.10.212    ceph-node2                  osd2 

192.168.10.213    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

192.168.10.220    ceph-admin

192.168.10.239    ceph-node1 

192.168.10.212    ceph-node2

192.168.10.213    ceph-node3

-------------------------------------------------

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

# sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config

# setenforce 0

-------------------------------------------------

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

-------------------------------------------------

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-mimic/el7/x86_64/

gpgcheck=0

priority =1

[ceph-noarch]

name=cephnoarch

baseurl=http://mirrors.aliyun.com/ceph/rpm-mimic/el7/noarch/

gpgcheck=0

priority =1

[ceph-source]

name=Ceph source packages

baseurl=http://mirrors.aliyun.com/ceph/rpm-mimic/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

第二步: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

 

检查磁盘

$ sudo fdisk -l /dev/vdb

Disk /dev/vdb: 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

 

格式化磁盘

$ sudo mkfs.xfs /dev/vdb -f

 

查看磁盘格式（xfs格式）

$ sudo blkid -o value -s TYPE /dev/vdb

第三步: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

      

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'192.168.10.220']

[ceph_deploy.new][DEBUG ] Resolving host ceph-admin

[ceph_deploy.new][DEBUG ] Monitor ceph-admin at 192.168.10.220

[ceph_deploy.new][DEBUG ] Monitor initial members are ['ceph-admin']

[ceph_deploy.new][DEBUG ] Monitor addrs are ['192.168.10.220']

[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 = 192.168.10.220/24

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 --adjust-repos

      

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/vdb ceph-node2:/dev/vdb ceph-node3:/dev/vdb

      

准备OSD（使用prepare命令）

[cephuser@ceph-admin cluster]$ ceph-deploy osd prepare ceph-node1:/dev/vdb ceph-node2:/dev/vdb ceph-node3:/dev/vdb

      

激活OSD（注意由于ceph对磁盘进行了分区，/dev/vdb磁盘分区为/dev/vdb1）

[cephuser@ceph-admin cluster]$ ceph-deploy osd activate ceph-node1:/dev/vdb1 ceph-node2:/dev/vdb1 ceph-node3:/dev/vdb1

---------------------------------------------------------------------------------------------

可能出现下面的报错：

[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：

[cephuser@ceph-node1 ~]$ lsblk

NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT

sr0              11:0    1  4.2G  0 rom

vda             252:0    0   70G  0 disk

├─vda1          252:1    0    1G  0 part /boot

└─vda2          252:2    0   69G  0 part

  ├─centos-root 253:0    0 43.8G  0 lvm  /

  ├─centos-swap 253:1    0  3.9G  0 lvm  [SWAP]

  └─centos-home 253:2    0 21.4G  0 lvm  /home

vdb             252:16   0   20G  0 disk

├─vdb1          252:17   0   15G  0 part /var/lib/ceph/osd/ceph-0       #挂载成功

└─vdb2          252:18   0    5G  0 part

     

[cephuser@ceph-node2 ~]$ lsblk

NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT

sr0              11:0    1  4.2G  0 rom

vda             252:0    0   70G  0 disk

├─vda1          252:1    0    1G  0 part /boot

└─vda2          252:2    0   69G  0 part

  ├─centos-root 253:0    0 43.8G  0 lvm  /

  ├─centos-swap 253:1    0  3.9G  0 lvm  [SWAP]

  └─centos-home 253:2    0 21.4G  0 lvm  /home

vdb             252:16   0   20G  0 disk

├─vdb1          252:17   0   15G  0 part /var/lib/ceph/osd/ceph-1        #挂载成功

└─vdb2          252:18   0    5G  0 part

     

[cephuser@ceph-node3 ~]$ lsblk

NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT

sr0              11:0    1  4.2G  0 rom

vda             252:0    0   70G  0 disk

├─vda1          252:1    0    1G  0 part /boot

└─vda2          252:2    0   69G  0 part

  ├─centos-root 253:0    0 43.8G  0 lvm  /

  ├─centos-swap 253:1    0  3.9G  0 lvm  [SWAP]

  └─centos-home 253:2    0 21.4G  0 lvm  /home

vdb             252:16   0   20G  0 disk

├─vdb1          252:17   0   15G  0 part /var/lib/ceph/osd/ceph-2       #挂载成功

└─vdb2          252:18   0    5G  0 part

     

查看OSD

[cephuser@ceph-admin cluster]$ ceph-deploy disk list ceph-node1 ceph-node2 ceph-node3

........

[ceph-node1][DEBUG ]  /dev/vdb2 ceph journal, for /dev/vdb1      #如下显示这两个分区，则表示成功了

[ceph-node1][DEBUG ]  /dev/vdb1 ceph data, active, cluster ceph, osd.0, journal /dev/vdb2

........

[ceph-node3][DEBUG ]  /dev/vdb2 ceph journal, for /dev/vdb1       

[ceph-node3][DEBUG ]  /dev/vdb1 ceph data, active, cluster ceph, osd.1, journal /dev/vdb2

.......

[ceph-node3][DEBUG ]  /dev/vdb2 ceph journal, for /dev/vdb1

[ceph-node3][DEBUG ]  /dev/vdb1 ceph data, active, cluster ceph, osd.2, journal /dev/vdb2

     

     

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 [email protected]         #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 [email protected]

[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 [email protected]

[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

第四步: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 28190 ceph   10u  IPv4  70217      0t0  TCP ceph-admin:smc-https (LISTEN)

ceph-mon 28190 ceph   19u  IPv4  70537      0t0  TCP ceph-admin:smc-https->ceph-node1:41308 (ESTABLISHED)

ceph-mon 28190 ceph   20u  IPv4  70560      0t0  TCP ceph-admin:smc-https->ceph-node2:48516 (ESTABLISHED)

ceph-mon 28190 ceph   21u  IPv4  70583      0t0  TCP ceph-admin:smc-https->ceph-node3:44948 (ESTABLISHED)

ceph-mon 28190 ceph   22u  IPv4  72643      0t0  TCP ceph-admin:smc-https->ceph-admin:51474 (ESTABLISHED)

ceph-mds 29093 ceph    8u  IPv4  72642      0t0  TCP ceph-admin:51474->ceph-admin:smc-https (ESTABLISHED)

第五步:client端挂载ceph存储（采用fuse方式）

安装ceph-fuse（这里的客户机是centos6系统）

[root@centos6-02 ~]# rpm -Uvh https://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

[root@centos6-02 ~]# yum install -y ceph-fuse

 

创建挂载目录

[root@centos6-02 ~]# 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（192.168.10.220为管理节点）

[root@centos6-02 ~]# rsync -e "ssh -p22" -avpgolr [email protected]:/etc/ceph/ceph.conf /etc/ceph/

或者

[root@centos6-02 ~]# rsync -e "ssh -p22" -avpgolr [email protected]:/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 [email protected]:/etc/ceph/ceph.client.admin.keyring /etc/ceph/

或者

[root@centos6-02 ~]# rsync -e "ssh -p22" -avpgolr [email protected]:/home/cephuser/cluster/ceph.client.admin.keyring /etc/ceph/

 

查看ceph授权

[root@centos6-02 ~]# ceph auth list

installed auth entries:

 

mds.ceph-admin

    key: AQAZZxdbH6uAOBAABttpSmPt6BXNtTJwZDpSJg==

    caps: [mds] allow

    caps: [mon] allow profile mds

    caps: [osd] allow rwx

osd.0

    key: AQCuWBdbV3TlBBAA4xsAE4QsFQ6vAp+7pIFEHA==

    caps: [mon] allow profile osd

    caps: [osd] allow *

osd.1

    key: AQC6WBdbakBaMxAAsUllVWdttlLzEI5VNd/41w==

    caps: [mon] allow profile osd

    caps: [osd] allow *

osd.2

    key: AQDJWBdbz6zNNhAATwzL2FqPKNY1IvQDmzyOSg==

    caps: [mon] allow profile osd

    caps: [osd] allow *

client.admin

    key: AQCNWBdbf1QxAhAAkryP+OFy6wGnKR8lfYDkUA==

    caps: [mds] allow *

    caps: [mon] allow *

    caps: [osd] allow *

client.bootstrap-mds

    key: AQCNWBdbnjLILhAAT1hKtLEzkCrhDuTLjdCJig==

    caps: [mon] allow profile bootstrap-mds

client.bootstrap-mgr

    key: AQCOWBdbmxEANBAAiTMJeyEuSverXAyOrwodMQ==

    caps: [mon] allow profile bootstrap-mgr

client.bootstrap-osd

    key: AQCNWBdbiO1bERAARLZaYdY58KLMi4oyKmug4Q==

    caps: [mon] allow profile bootstrap-osd

client.bootstrap-rgw

    key: AQCNWBdboBLXIBAAVTsD2TPJhVSRY2E9G7eLzQ==

    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 192.168.10.220:6789 /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@centos6-02 ~]# df -h

Filesystem            Size  Used Avail Use% Mounted on

/dev/mapper/vg_centos602-lv_root

                       50G  3.5G   44G   8% /

tmpfs                 1.9G     0  1.9G   0% /dev/shm

/dev/vda1             477M   41M  412M   9% /boot

/dev/mapper/vg_centos602-lv_home

                       45G   52M   43G   1% /home

/dev/vdb1              20G  5.1G   15G  26% /data/osd1

ceph-fuse              45G  100M   45G   1% /cephfs

 

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

 

温馨提示：

当有一半以上的OSD节点挂掉后，远程客户端挂载的Ceph存储就会使用异常了，即暂停使用。比如本案例中有3个OSD节点，当其中一个OSD节点挂掉后（比如宕机），

客户端挂载的Ceph存储使用正常；但当有2个OSD节点挂掉后，客户端挂载的Ceph存储就不能正常使用了（表现为Ceph存储目录下的数据读写操作一直卡着状态），

当OSD节点恢复后，Ceph存储也会恢复正常使用。OSD节点宕机重新启动后，osd程序会自动起来（通过监控节点自动起来）

 

 

引申：mimic版本 ceph-mgr

 

mimic 版 dashboard 安装

1、添加mgr 功能

 　　# ceph-deploy mgr create node1 node2 node3

 2、开启dashboard 功能

 　　# ceph mgr module enable dashboard

3、创建证书

　　# ceph dashboard create-self-signed-cert

4、创建 web 登录用户密码

　　# ceph dashboard set-login-credentials user-name password

5、查看服务访问方式

　　# ceph mgr services

相关记录:

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清除ceph存储

清除安装包

[cephuser@ceph-admin ~]$ ceph-deploy purge ceph1 ceph2 ceph3

  

清除配置信息

[cephuser@ceph-admin ~]$ ceph-deploy purgedata ceph1 ceph2 ceph3

[cephuser@ceph-admin ~]$ ceph-deploy forgetkeys

  

每个节点删除残留的配置文件

[cephuser@ceph-admin ~]$ sudo rm -rf /var/lib/ceph/osd/*

[cephuser@ceph-admin ~]$ sudo rm -rf /var/lib/ceph/mon/*

[cephuser@ceph-admin ~]$ sudo rm -rf /var/lib/ceph/mds/*

[cephuser@ceph-admin ~]$ sudo rm -rf /var/lib/ceph/bootstrap-mds/*

[cephuser@ceph-admin ~]$ sudo rm -rf /var/lib/ceph/bootstrap-osd/*

[cephuser@ceph-admin ~]$ sudo rm -rf /var/lib/ceph/bootstrap-mon/*

[cephuser@ceph-admin ~]$ sudo rm -rf /var/lib/ceph/tmp/*

[cephuser@ceph-admin ~]$ sudo rm -rf /etc/ceph/*

[cephuser@ceph-admin ~]$ sudo rm -rf /var/run/ceph/*

 

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查看ceph命令，关于ceph osd、ceph mds、ceph mon、ceph pg的命令

[cephuser@ceph-admin ~]$ ceph --help             

 

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如下报错

[cephuser@ceph-admin ~]$ ceph osd tree

2018-06-06 14:56:27.843841 7f8a0b6dd700 -1 auth: unable to find a keyring on /etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin: (2) No such file or directory

2018-06-06 14:56:27.843853 7f8a0b6dd700 -1 monclient(hunting): ERROR: missing keyring, cannot use cephx for authentication

2018-06-06 14:56:27.843854 7f8a0b6dd700  0 librados: client.admin initialization error (2) No such file or directory

Error connecting to cluster: ObjectNotFound

[cephuser@ceph-admin ~]$ ceph osd stat

2018-06-06 14:55:58.165882 7f377a1c9700 -1 auth: unable to find a keyring on /etc/ceph/ceph.client.admin.keyring,/etc/ceph/ceph.keyring,/etc/ceph/keyring,/etc/ceph/keyring.bin: (2) No such file or directory

2018-06-06 14:55:58.165894 7f377a1c9700 -1 monclient(hunting): ERROR: missing keyring, cannot use cephx for authentication

2018-06-06 14:55:58.165896 7f377a1c9700  0 librados: client.admin initialization error (2) No such file or directory

 

解决办法：

[cephuser@ceph-admin ~]$ sudo chmod 644 /etc/ceph/ceph.client.admin.keyring

 

[cephuser@ceph-admin ~]$ ceph osd stat

     osdmap e35: 3 osds: 3 up, 3 in

            flags sortbitwise,require_jewel_osds

[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