Ceph集群部署

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CEPH搭建

环境部署---三台centos7.1主机；内核：3.10.0-229.el7.x86_64

IP 角色 Hostname

IP	角色	Hostname
192.168.1.10	osd mon admin	ceph-01
192.168.1.11	asd mon	ceph-02
192.168.1.12	asd mon	ceph-03

一、配置admin节点与osd节点无密码认证（ssh秘钥）

1.1、修改主机名(三台主机均做此操作)

[[email protected] root]#vim /etc/hostname

ceph-01

[[email protected] root]#hostname

ceph-01

1.2、修改hosts文件，通过主机名可以实现通讯

1.2.1在admin节点做以下操作（实现到所有asd节点的免密码登录）

[[email protected] root]#vim /etc/hosts

192.168.1.10 ceph-01

192.168.1.11 ceph-02

192.168.1.12 ceph-03

1.2.2在其他osd节点和mon节点做以下操作（按照规划修改命名）

[[email protected] root]#vim /etc/hosts

192.168.1.11 ceph-02

1.2.3ping测试（admin节点）

[[email protected] root]#ping ceph-01

PING ceph-01 (192.168.1.10) 56(84) bytes of data.

64 bytes from ceph-01 (192.168.1.10): icmp_seq=1 ttl=64 time=0.036 ms

64 bytes from ceph-01 (192.168.1.10): icmp_seq=2 ttl=64 time=0.028 ms

^C

--- ceph-01 ping statistics ---

2 packets transmitted, 2 received, 0% packet loss, time 999ms

rtt min/avg/max/mdev = 0.028/0.032/0.036/0.004 ms

[[email protected] root]#ping ceph-02

PING ceph-02 (192.168.1.11) 56(84) bytes of data.

64 bytes from ceph-02 (192.168.1.11): icmp_seq=1 ttl=64 time=0.248 ms

64 bytes from ceph-02 (192.168.1.11): icmp_seq=2 ttl=64 time=0.250 ms

^C

--- ceph-02 ping statistics ---

2 packets transmitted, 2 received, 0% packet loss, time 1000ms

rtt min/avg/max/mdev = 0.248/0.249/0.250/0.001 ms

[[email protected] root]#ping ceph-03

PING ceph-03 (192.168.1.12) 56(84) bytes of data.

64 bytes from ceph-03 (192.168.1.12): icmp_seq=1 ttl=64 time=0.174 ms

64 bytes from ceph-03 (192.168.1.12): icmp_seq=2 ttl=64 time=0.172 ms

^C

--- ceph-03 ping statistics ---

2 packets transmitted, 2 received, 0% packet loss, time 1000ms

rtt min/avg/max/mdev = 0.172/0.173/0.174/0.001 ms

1.2.4添加白名单（所有节点做以下操作hosts.allow 60是admin节点IP）

[[email protected] root]#vim /etc/hosts.allow

sshd:192.168.1.10:allow

1.2.5配置基础环境，关闭防火墙、设置selinux（所有节点均做此操作）

[[email protected] root]#systemctl stop firewalld

[[email protected] root]#systemctl disable firewalld

[[email protected] root]#vim /etc/selinux/config

SELINUX=disabled

[[email protected] root]#setenforce 0

1.2.6配置免密码认证

1.2.6.1修改ssh配置文件（所有节点）

[[email protected] root]#vim /etc/ssh/sshd_config

PermitRootLogin yes #允许root登录 （在环境部署完成后可以将其注释掉 root风险较大）

[[email protected] root]#systemctl restart sshd

1.2.6.2生成秘钥（admin节点）

ssh-keygen #一路回车即可

1.2.6.3将公钥拷贝到各ceph 节点（admin节点）

[[email protected] root]#ssh-copy-id root@ceph-01

[[email protected] root]#ssh-copy-id root@ceph-02

[[email protected] root]#ssh-copy-id root@ceph-03

验证

[[email protected] root]#ssh ceph-01

Last login: Tue Mar 20 09:46:13 2018 from 192.168.1.10

[[email protected] ~]#

[[email protected] root]#ssh ceph-02

Last login: Tue Mar 20 09:45:40 2018 from 192.168.1.10

[[email protected] ~]#

[[email protected] root]#ssh ceph-03

Last login: Mon Mar 19 16:01:10 2018 from 192.168.1.10

[[email protected] ~]#

二、配置NTP（所有节点）

2.1、yum安装ntp

[[email protected] root]#yum -y install ntp

2.2、将ntp.conf文件备份，指定ntp服务器（这里是将ceph-01、ceph-02部署为ntp server）

[[email protected] root]#cp /etc/ntp.conf /etc/ntp.conf.bak

[[email protected] root]#grep -v "^#" /etc/ntp.conf | grep -v "^$"

driftfile /var/lib/ntp/drift

restrict default nomodify notrap nopeer noquery

restrict 127.0.0.1

restrict ::1

restrict 0.0.0.0 mask 0.0.0.0 nomodify notrap

server 192.168.1.10 prefer

server 192.168.1.11

includefile /etc/ntp/crypto/pw

keys /etc/ntp/keys

disable monitor

2.3.、重合并加入开机自启

[[email protected] root]#systemctl restart ntpd

[[email protected] root]#systemctl enable ntpd

2.4、 写入硬时钟

[[email protected] root]#hwclock -w

2.5、验证

[[email protected] root]#ntpq -p

remote refid st t when poll reach delay offset jitter

==============================================================================

*192.168.1.10 LOCAL(0) 2 u 254 1024 377 0.209 -0.475 1.544

192.168.1.11 .INIT. 16 u - 1024 0 0.000 0.000 0.000

三、部署Ceph环境

3.1、添加分区，这里以一台设备添加一块磁盘为例

#sdb 500G的ssd盘 在这里做日志盘

#sdd 4T普通盘 做数据盘

[[email protected] root]#parted -s /dev/sdb mklabel gpt

[[email protected] root]#parted -s /dev/sdd mklabel gpt

[[email protected] root]#parted -s /dev/sdb mkpart primary 1 15000 #分区1 15G大小

[[email protected] root]#parted -s /dev/sdd mkpart primary 1 100%

#for i in {b..m};do parted -s /dev/sd${i} mklabel gpt;done

查看

[[email protected] root]#lsblk

sdb 8:16 0 446.6G 0 disk

└─sdb1 8:17 0 14G 0 part

sdd 8:48 0 3.7T 0 disk

└─sdd1 8:49 0 3.7T 0 part

3.2、配置yum源，这里用的是自己搭建的yum源（所有节点）

#若不知道怎么搭建，请看上篇博客-《搭建本地Ceph yum源》

3.2.1查看yum源文件

[[email protected] root]#cat ceph.repo

[Ceph-10.2.9]

name=Ceph-10.2.9

baseurl=http://yum server IP/yum/x86_64/ceph

gpgcheck=0

enabled=1

#也可以使用阿里源

3.2.2清除缓存并生成新的yum缓存

[[email protected] root]#yum clean all

[[email protected] root]#yum makecache

3.3、开始安装

3.3.1内核优化（所有节点）

[[email protected] root]#echo 'kernel.pid_max = 4194303' >> /etc/sysctl.conf

[[email protected] root]#echo 'fs.file-max = 26234859' >> /etc/sysctl.conf

[[email protected] root]#echo '* soft nofile 65536' >> /etc/security/limits.conf

[[email protected] root]#echo '* hard nofile 65536' >> /etc/security/limits.conf

3.3.1admin节点部署

[[email protected] root]#yum -y install ceph-deploy

[[email protected] root]# cd

[[email protected] ~]# mkdir my-cluster

[[email protected] ~]# cd my-cluster/

3.3.2osd节点部署

[[email protected] root]#yum install ceph

3.3.3初始化mon

3.3.3.1第一步 这些操作必须在my-cluster目录下

[[email protected] my-cluster]#ceph-deploy new ceph-01 ceph-02 ceph-03

[[email protected] my-cluster]#ls

ceph.conf ceph-deploy-ceph.log ceph.mon.keyring

#会创建默认配置文件ceph.conf 有其他需求，可以修改配置文件

3.3.3.2初始化第二步

[[email protected] my-cluster]#ceph-deploy --overwrite-conf mon create-initial

#--overwrite-conf 参数意义是覆盖之前配置

3.4、添加osd（前一块盘放数据、后一块放日志）

日志盘需要给ceph:ceph权限

[[email protected] my-cluster]#chown ceph:ceph /dev/sdb*

预加载osd

[[email protected] my-cluster]#ceph-deploy --overwrite-conf osd prepare ceph-01:/dev/sdd1:/dev/sdb1

激活osd

[[email protected] my-cluster]#ceph-deploy --overwrite-conf osd activate ceph-01:/dev/sdd1:/dev/sdb1

查看

[[email protected] my-cluster]#ceph -s

cluster fba764dc-998a-4acb-ac23-2d0a405e59f7

health HEALTH_OK

monmap e1: 3 mons at {ceph-01=192.168.1.10:6789/0,ceph-02=192.168.1.11:6789/0,ceph-03=192.168.1.12:6789/0}

election epoch 6, quorum 0,1,2 ceph-01,ceph-02,ceph-03

osdmap e21: 3 osds: 3 up, 3 in

flags sortbitwise,require_jewel_osds

pgmap v46: 64 pgs, 1 pools, 181 bytes data, 1 objects

100 MB used, 11170 GB / 11171 GB avail

64 active+clean

快速格式磁盘

sgdisk -o /dev/sdd

mkfs.xfs -f -i size=2048 /dev/sdd1

parted -s /dev/sdd mklabel gpt

parted -s /dev/sdd mkpart primary 1 100%