1.Ceph集群环境

   使用3台虚拟机,包括其中1个admin节点,三台虚拟机同时承担3个monitor节点和3个osd节点

    操作系统采用CentOS Minimal 7 下载地址:

 

2. 前提准备所有的主机都进行

# hostnamectl set-hostname ceph1 \\修改主机名

# vi /etc/sysconfig/network-scripts/ifcfg-ens32  或者 nmtui  \\配置IP地址

# systemctl restart network \\重启网络服务

\\ 由于安装的CentOS Minimal版,tab键无法补全命令参数,建议执行一条命令,老鸟可以忽略

#yum -y install bash-completion.noarch

# date  \\查看系统时间,保证各系统的时间一致

#echo '192.168.59.131  ceph1' >> /etc/hosts \\修改hosts文件,添加所有服务器的映射

#setenforce 0     \\关闭selinux

#sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config  \\修改配置文件,使关闭selinux永久生效

#firewall-cmd --zone=public --add-port=6789/tcp --permanent    

#firewall-cmd --zone=public --add-port=6800-7100/tcp --permanent  \\ 添加防火墙策略

#firewall-cmd --reload    \\使其防火墙策略生效

#ssh-keygen   \\生成SSH密钥

#ssh-copy-id root@ceph1    \\需各服务器之间进行拷贝

3. 开始进行ceph-deploy的部署,部署其中一台机器即可

# vi /etc/yum.repos.d/ceph.repo    \\新增ceph yum源,输入以下内容  

[ceph-noarch]  

name=Ceph noarch packages

baseurl=http://download.ceph.com/rpm-luminous/el7/noarch   

enabled=1  

gpgcheck=1  

type=rpm-md  

gpgkey=https://download.ceph.com/keys/release.asc 

        

#yum update  && reboot    \\更并重启系统

#yum install ceph-deploy -y    \\安装ceph-deploy

    a. 此处出现错误

Downloading packages:

(1/4): python-backports-ssl_match_hostname-3.4.0.2-4.el7.noarch.rpm    |  12 kB  00:00:00     

(2/4): python-backports-1.0-8.el7.x86_64.rpm      | 5.8 kB  00:00:02     

ceph-deploy-1.5.38-0.noarch.rp FAILED         ]  90 kB/s | 298 kB  00:00:04 ETA 

http://download.ceph.com/rpm-luminous/el7/noarch/ceph-deploy-1.5.38-0.noarch.rpm: [Errno -1] Package does not match intended download. Suggestion: run yum --enablerepo=ceph-noarch clean metadata

Trying other mirror.

(3/4): python-setuptools-0.9.8-7.el7.noarch.rpm         | 397 kB  00:00:05     

Error downloading packages:

ceph-deploy-1.5.38-0.noarch: [Errno 256] No more mirrors to try.

  处理方法如下:

#rpm -ivh

    b. 此处出现错误:

            

Retrieving http://download.ceph.com/rpm-luminous/el7/noarch/ceph-deploy-1.5.38-0.noarch.rpm

warning: /var/tmp/rpm-tmp.gyId2U: Header V4 RSA/SHA256 Signature, key ID 460f3994: NOKEY

error: Failed dependencies:

python-distribute is needed by ceph-deploy-1.5.38-0.noarch

    处理方法:

# yum install python-distribute -y

 再次执行

#rpm -ivh 

                        

4. 部署monitor服务

#mkdir ~/ceph-cluster  && cd ~/ceph-cluster  \\新建集群配置目录

#ceph-deploy new ceph1 ceph2 ceph3    \\部署完后生产3个文件,一个Ceph配置文件、一个monitor密钥环和一个日志文件

#ls -l    

-rw-r--r-- 1 root root    266 Sep 19 16:41 ceph.conf

-rw-r--r-- 1 root root 172037 Sep 19 16:32 ceph-deploy-ceph.log

-rw------- 1 root root     73 Sep 19 11:03 ceph.mon.keyring

 #ceph-deploy mon create-initial    \\初始化群集

5. 安装ceph

 #ceph-deploy install ceph1 ceph2 ceph3    \\在ceph1 ceph2 ceph3上安装ceph

    a. 此处出现错误

        

[ceph1][DEBUG ] Retrieving https://download.ceph.com/rpm-jewel/el7/noarch/ceph-release-1-0.el7.noarch.rpm

[ceph1][WARNIN] warning: /etc/yum.repos.d/ceph.repo created as /etc/yum.repos.d/ceph.repo.rpmnew

[ceph1][DEBUG ] Preparing...                          ########################################

[ceph1][DEBUG ] Updating / installing...

[ceph1][DEBUG ] ceph-release-1-1.el7                  ########################################

[ceph1][WARNIN] ensuring that /etc/yum.repos.d/ceph.repo contains a high priority

[ceph_deploy][ERROR ] RuntimeError: NoSectionError: No section: 'ceph'

   处理方式:

# yum remove ceph-release -y    

 再次执行#ceph-deploy install ceph1 ceph2 ceph3

6.    创建OSD

 # ceph-deploy disk list ceph{1,2,3}   \\列出各服务器磁盘

 # ceph-deploy --overwrite-conf osd prepare ceph1:sdc:/dev/sdb  ceph2:sdc:/dev/sdb  ceph3:sdc:/dev/sdb        \\准备磁盘 sdb 作为journal盘,sdc作为数据盘

 # ceph-deploy osd activate ceph1:sdc:/dev/sdb  ceph2:sdc:/dev/sdb  ceph3:sdc:/dev/sdb    \\激活osd

     此处出现一个错误,没有从网上查到解决方式,请高手赐教,此处的错误没有影响ceph的部署,通过命令已显示磁盘已成功mount

[ceph1][WARNIN] ceph_disk.main.FilesystemTypeError: Cannot discover filesystem type: device /dev/sdc: Line is truncated: 

[ceph1][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/sdc

 # lsblk 

NAME        MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT

sda           8:0    0   20G  0 disk 

├─sda1        8:1    0    1G  0 part /boot

└─sda2        8:2    0   19G  0 part 

  ├─cl-root 253:0    0   18G  0 lvm  /

  └─cl-swap 253:1    0    1G  0 lvm  [SWAP]

sdb           8:16   0   30G  0 disk 

└─sdb1        8:17   0    5G  0 part 

sdc           8:32   0   40G  0 disk 

└─sdc1        8:33   0   40G  0 part /var/lib/ceph/osd/ceph-0

sr0          11:0    1  680M  0 rom  

rbd0        252:0    0    1G  0 disk /root/rbddir

7. 部署成功

# ceph -s

    cluster e508bdeb-b986-4ee8-82c6-c25397a5f1eb

     health HEALTH_OK

     monmap e2: 3 mons at{ceph1=192.168.59.131:6789/0,ceph2=192.168.59.132:6789/0,ceph3=192.168.59.133:6789/0}

            election epoch 10, quorum 0,1,2 ceph1,ceph2,ceph3

     osdmap e55: 3 osds: 3 up, 3 in

            flags sortbitwise,require_jewel_osds

      pgmap v13638: 384 pgs, 5 pools, 386 MB data, 125 objects

            1250 MB used, 118 GB / 119 GB avail

                 384 active+clean

问题解决:

# ceph-deploy osd activate ceph1:sdc:/dev/sdb  ceph2:sdc:/dev/sdb  ceph3:sdc:/dev/sdb    \\激活osd

     此处出现一个错误,没有从网上查到解决方式,请高手赐教,此处的错误没有影响ceph的部署,通过命令已显示磁盘已成功mount

[ceph1][WARNIN] ceph_disk.main.FilesystemTypeError: Cannot discover filesystem type: device /dev/sdc: Line is truncated: 

[ceph1][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/sdc

原因:由于ceph对磁盘进行了分区,/dev/sdb磁盘分区为/dev/sdb1

正确的命令为:

# ceph-deploy osd activate ceph1:sdc1:/dev/sdb1  ceph2:sdc1:/dev/sdb1  ceph3:sdc1:/dev/sdb1

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原创作者:三石头

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