基于CentOS 7.3 安装Ceph Jewel 10.2.9
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https://www.lijiawang.org/posts/intsall-ceph.html
配置说明：
采用了4台centos7.3系统的虚拟机，1台Ceph-Master作为安装节点，NTP Server；3台Ceph节点，既作为OSD节点，也作为Monitor节点。每个OSD节点有6个盘：300G的系统盘，3个2TB作为SATA池的OSD，800GB作为SSD池的OSD，240GB SSD盘作为日志盘。
环境准备
这里安装centos7.3的操作系统我就不多说了，下面我说一下环境准备工作。
1.检查操作系统的版本
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CentOS Linux release 7.3.1611 (Core)
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2.查看系统内核版本
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3.10.0-514.26.2.el7.x86_64
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3.关闭防火墙和selinux
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sed -i ‘s/SELINUX=.*/SELINUX=disabled/‘ /etc/selinux/config
setenforce 0
systemctl stop firewalld
systemctl disable firewalld
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4.查看设备信息（所有的OSD节点）
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NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 300G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 299G 0 part
├─cl-root 253:0 0 50G 0 lvm /
├─cl-swap 253:1 0 2G 0 lvm [SWAP]
└─cl-home 253:2 0 247G 0 lvm /home
sdb 8:16 0 2T 0 disk
sdc 8:32 0 2T 0 disk
sdd 8:48 0 2T 0 disk
sde 8:64 0 800G 0 disk
sdf 8:80 0 240G 0 disk
sr0 11:0 1 1024M 0 rom
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5.查看网卡配置（所有OSD节点）
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1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:06:c8:a4 brd ff:ff:ff:ff:ff:ff
inet 172.16.0.11/24 brd 172.16.0.255 scope global eth0
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:06:c8:ae brd ff:ff:ff:ff:ff:ff
inet 192.168.0.11/24 brd 192.168.0.255 scope global eth1
valid_lft forever preferred_lft forever
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6.在所有节点配置hosts解析
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172.16.0.10 ceph-master
172.16.0.11 ceph-node-1
172.16.0.12 ceph-node-2
172.16.0.13 ceph-node-3
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7.安装基础的软件包(所有节点)
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yum install tree nmap sysstat lrzsz dos2unix wegt git net-tools -y
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8.建立SSH通信（在ceph-master节点上执行）
（1）生成秘钥文件
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ssh-keygen -t rsa
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（2）拷贝秘钥文件
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ssh-copy-id root@ceph-master
ssh-copy-id root@ceph-node-1
ssh-copy-id root@ceph-node-2
ssh-copy-id root@ceph-node-3
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环境准备基本完成
配置NTP服务
首先我们要在所有的节点上安装NTP服务
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在CEPH-MASTER节点上配置
1.修改NTP配置文件/etc/ntp.conf
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restrict 172.16.0.0 mask 255.255.255.0 nomodify notrap
server 127.127.1.0 minpoll 4
fudge 127.127.1.0 stratum 0
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2.修改配置文件/etc/ntp/step-tickers
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127.127.1.0
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3.启动NTP服务，并设置开机启动
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systemctl enable ntpd ; systemctl start ntpd
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在所有的OSD节点配置
1.修改NTP配置文件/etc/ntp.conf
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server 172.16.0.10
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2.启动NTP服务，并设置开机启动
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systemctl enable ntpd ; systemctl start ntpd
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验证NTP
在所有节点执行
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remote refid st t when poll reach delay offset jitter
==============================================================================
*ceph-master .LOCL. 1 u 16 64 377 0.269 0.032 0.269
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前面有 * 表示已经同步。
安装ceph
####跟新系统源(所有节点执行)
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rm -rf /etc/yum.repos.d/*.repo
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
sed -i ‘/aliyuncs/d‘ /etc/yum.repos.d/CentOS-Base.repo
sed -i ‘s/$releasever/7/g‘ /etc/yum.repos.d/CentOS-Base.repo
sed -i ‘/aliyuncs/d‘ /etc/yum.repos.d/epel.repo
yum clean all
yum makecache fast
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安装CEPH-DEPLOY
以下在ceph-master节点上执行
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查看CEPH-DEPLOY版本
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1.5.38
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创建CEPH集群
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ceph-deploy new ceph-node-1 ceph-node-2 ceph-node-3
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编辑CEPH配置文件
在global下添加以下配置：
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[global]
mon_clock_drift_allowed = 5
osd_journal_size = 20480
public_network=172.16.0.0/24
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安装CEPH
直接指定源地址，不用担心ceph.com官方源无法下载了。
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ceph-deploy install --release jewel --repo-url http://mirrors.163.com/ceph/rpm-jewel/el7 --gpg-url http://mirrors.163.com/ceph/keys/release.asc ceph-master ceph-node-1 ceph-node-2 ceph-node-3
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检查CEPH版本
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ceph -v
ceph version 10.2.9 (2ee413f77150c0f375ff6f10edd6c8f9c7d060d0)
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初始化MOM节点
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ceph-deploy mon create-initial
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查看集群状态（在OSD节点上查看）
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cluster 60597e53-ad29-44bd-8dcd-db6aeae6f580
health HEALTH_ERR
no osds
monmap e2: 3 mons at {ceph-node-1=172.16.0.11:6789/0,ceph-node-2=172.16.0.12:6789/0,ceph-node-3=172.16.0.13:6789/0}
election epoch 6, quorum 0,1,2 ceph-node-1,ceph-node-2,ceph-node-3
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
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配置管理节点ceph-master
为什么每次查看ceph –s的只能在OSD节点上执行，而不能在Master节点上执行？
用ceph-deploy把配置文件和admin密钥拷贝到Master节点
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确保你对ceph.client.admin.keyring有正确的操作权限
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检查集群的健康状况
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cluster 60597e53-ad29-44bd-8dcd-db6aeae6f580
health HEALTH_ERR
no osds
monmap e2: 3 mons at {ceph-node-1=172.16.0.11:6789/0,ceph-node-2=172.16.0.12:6789/0,ceph-node-3=172.16.0.13:6789/0}
election epoch 6, quorum 0,1,2 ceph-node-1,ceph-node-2,ceph-node-3
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
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对OSD节点配置
磁盘分区
将240G的SSD盘分出4个20G的分区用作 journal
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Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x9ec0a047.
Command (m for help): g
Building a new GPT disklabel (GUID: 31D328DD-E9A0-4306-9C99-8D42F7BA8008)
Command (m for help): n
Partition number (1-128, default 1):
First sector (2048-503316446, default 2048):
Last sector, +sectors or +size{K,M,G,T,P} (2048-503316446, default 503316446): +20G
Created partition 1
Command (m for help): n
Partition number (2-128, default 2):
First sector (41945088-503316446, default 41945088):
Last sector, +sectors or +size{K,M,G,T,P} (41945088-503316446, default 503316446): +20G
Created partition 2
Command (m for help): n
Partition number (3-128, default 3):
First sector (83888128-503316446, default 83888128):
Last sector, +sectors or +size{K,M,G,T,P} (83888128-503316446, default 503316446): +20G
Created partition 3
Command (m for help): n
Partition number (4-128, default 4):
First sector (125831168-503316446, default 125831168):
Last sector, +sectors or +size{K,M,G,T,P} (125831168-503316446, default 503316446): +20G
Created partition 4
Command (m for help): p
Disk /dev/sdf: 257.7 GB, 257698037760 bytes, 503316480 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
1 2048 41945087 20G Linux filesyste
2 41945088 83888127 20G Linux filesyste
3 83888128 125831167 20G Linux filesyste
4 125831168 167774207 20G Linux filesyste
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
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查看分区
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NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 300G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 299G 0 part
├─cl-root 253:0 0 50G 0 lvm /
├─cl-swap 253:1 0 2G 0 lvm [SWAP]
└─cl-home 253:2 0 247G 0 lvm /home
sdb 8:16 0 2T 0 disk
sdc 8:32 0 2T 0 disk
sdd 8:48 0 2T 0 disk
sde 8:64 0 800G 0 disk
sdf 8:80 0 240G 0 disk
├─sdf1 8:81 0 20G 0 part
├─sdf2 8:82 0 20G 0 part
├─sdf3 8:83 0 20G 0 part
└─sdf4 8:84 0 20G 0 part
sr0 11:0 1 1024M 0 rom
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修改 JOURNAL 分区权限
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chown ceph:ceph /dev/sdf[1-4]
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添加OSD
在ceph-master执行
先部署SATA
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ceph-deploy osd prepare ceph-node-1:/dev/sdb:/dev/sdf1 ceph-node-1:/dev/sdc:/dev/sdf2 ceph-node-1:/dev/sdd:/dev/sdf3 ceph-node-2:/dev/sdb:/dev/sdf1 ceph-node-2:/dev/sdc:/dev/sdf2 ceph-node-2:/dev/sdd:/dev/sdf3 ceph-node-3:/dev/sdb:/dev/sdf1 ceph-node-3:/dev/sdc:/dev/sdf2 ceph-node-3:/dev/sdd:/dev/sdf3
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再部署SSD
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ceph-deploy osd prepare ceph-node-1:/dev/sde:/dev/sdf4 ceph-node-2:/dev/sde:/dev/sdf4 ceph-node-3:/dev/sde:/dev/sdf4
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先部署SATA，再部署SSD，这样序号就会连续了…
查看集群状态
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cluster f9dba93b-c40f-4b31-8e6d-6ea830cad944
health HEALTH_OK
monmap e1: 3 mons at {ceph-node-1=172.16.0.11:6789/0,ceph-node-2=172.16.0.12:6789/0,ceph-node-3=172.16.0.13:6789/0}
election epoch 6, quorum 0,1,2 ceph-node-1,ceph-node-2,ceph-node-3
osdmap e56: 12 osds: 12 up, 12 in
flags sortbitwise,require_jewel_osds
pgmap v142: 128 pgs, 1 pools, 0 bytes data, 0 objects
413 MB used, 20821 GB / 20821 GB avail
128 active+clean
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查看OSD的分布
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ID WEIGHT TYPE NAME UP/DOWN REWEIGHT PRIMARY-AFFINITY
-1 20.33363 root default
-2 6.77788 host ceph-node-1
0 1.99899 osd.0 up 1.00000 1.00000
1 1.99899 osd.1 up 1.00000 1.00000
4 1.99899 osd.4 up 1.00000 1.00000
9 0.78090 osd.9 up 1.00000 1.00000
-3 6.77788 host ceph-node-2
2 1.99899 osd.2 up 1.00000 1.00000
3 1.99899 osd.3 up 1.00000 1.00000
5 1.99899 osd.5 up 1.00000 1.00000
10 0.78090 osd.10 up 1.00000 1.00000
-4 6.77788 host ceph-node-3
6 1.99899 osd.6 up 1.00000 1.00000
7 1.99899 osd.7 up 1.00000 1.00000
8 1.99899 osd.8 up 1.00000 1.00000
11 0.78090 osd.11 up 1.00000 1.00000
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安装完毕
ceph安装完毕
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