centos7使用ceph-deploy部署ceph

准备阶段

准备yum源

删除默认的源，国外的比较慢

yum clean all
rm -rf /etc/yum.repos.d/*.repo

下载阿里云的base源

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

下载阿里云的epel源

wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

修改里面的系统版本为7.3.1611,当前用的centos的版本的的yum源可能已经清空了

sed -i '/aliyuncs/d' /etc/yum.repos.d/CentOS-Base.repo
sed -i '/aliyuncs/d' /etc/yum.repos.d/epel.repo
sed -i 's/$releasever/7.3.1611/g' /etc/yum.repos.d/CentOS-Base.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

准备系统配置

设置deploy主机的/etc/hosts文件

192.168.0.39 ceph-admin
192.168.0.40 mon1
192.168.0.41 osd1
192.168.0.42 osd2
192.168.0.43 osd3

修改deploy主机上的~/.ssh/config文件

Host ceph-admin
   Hostname ceph-admin
   User cephuser
Host mon1
   Hostname mon1
   User cephuser
Host osd1
   Hostname osd1
   User cephuser
Host osd2
   Hostname osd2
   User cephuser
Host osd3
   Hostname osd3
   User cephuser

修改权限

chmod 644 ~/.ssh/config

添加用户

useradd -d /home/cephuser -m cephuser
passwd cephuser

确保添加的用户用sudo权限

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

设置deploy主机可以无密码访问其他node

su - cephuser
ssh-keygen
ssh-copy-id ceph-admin
ssh-copy-id mon1
ssh-copy-id osd1
ssh-copy-id osd2
ssh-copy-id osd3

安装NTP服务

yum install -y ntp ntpdate ntp-doc
ntpdate 0.us.pool.ntp.org
hwclock --systohc
systemctl enable ntpd.service
systemctl start ntpd.service

禁用selinux

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

关闭防火墙

ssh root@ceph-admin
systemctl stop firewalld
systemctl disable firewalld

准备磁盘

note: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。

检查磁盘

sudo fdisk -l /dev/vdb

格式化磁盘

sudo parted -s /dev/vdb mklabel gpt mkpart primary xfs 0% 100%
sudo mkfs.xfs /dev/vdb -f

查看磁盘格式

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

部署阶段

安装ceph-deploy

sudo yum update -y && sudo yum install ceph-deploy -y

创建cluster目录

su - cephuser
mkdir cluster
cd cluster/

创建集群

ceph-deploy new mon1

修改ceph.conf文件

vim ceph.conf
# Your network address
public network = 192.168.0.0/24
osd pool default size = 3

安装ceph

ceph-deploy install ceph-admin mon1 osd1 osd2 osd3

初始化monitor，并收集所有密钥

ceph-deploy mon create-initial
ceph-deploy gatherkeys mon1

添加OSD到集群

检查OSD节点上所有可用的磁盘

ceph-deploy disk list osd1 osd2 osd3

使用zap选项删除所有osd节点上的分区

ceph-deploy disk zap osd1:/dev/vdb osd2:/dev/vdb osd3:/dev/vdb

准备OSD

ceph-deploy osd prepare osd1:/dev/vdb osd2:/dev/vdb osd3:/dev/vdb

激活OSD

ceph-deploy osd activate osd1:/dev/vdb1 osd2:/dev/vdb1 osd3:/dev/vdb1

查看OSD

ceph-deploy disk list osd1 osd2 osd3

显示两个分区

/dev/sdb1 - Ceph Data
/dev/sdb2 - Ceph Journal

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 monitor 地址和 ceph.client.admin.keyring 了

ceph-deploy admin ceph-admin mon1 osd1 osd2 osd3

修改密钥权限

sudo chmod 644 /etc/ceph/ceph.client.admin.keyring

完成！

检查ceph

检查ceph状态

sudo ceph health
sudo ceph -s