部署ceph存储集群及块设备测试

集群环境

配置基础环境

添加ceph.repo

wget -O /etc/yum.repos.d/ceph.repo https://raw.githubusercontent.com/aishangwei/ceph-demo/master/ceph-deploy/ceph.repo
yum makecache

配置NTP

yum -y install ntpdate ntp
ntpdate cn.ntp.org.cn
systemctl restart ntpd ntpdate;systemctl enable ntpd ntpdate

创建用户和ssh免密登录

useradd ceph-admin
echo "ceph-admin"|passwd --stdin ceph-admin
echo "ceph-admin ALL = (root) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/ceph-admin
sudo chmod  /etc/sudoers.d/ceph-admin

配置host解析
cat >>/etc/hosts<<EOF
10.1.10.201 ceph01
10.1.10.202 ceph02
10.1.10.203 ceph03
EOF

配置sudo不需要tty

sed -i 's/Default requiretty/#Default requiretty/' /etc/sudoers

使用ceph-deploy部署集群

配置免密登录

su - ceph-admin
ssh-keygen
ssh-copy-id ceph-admin@ceph01
ssh-copy-id ceph-admin@ceph02
ssh-copy-id ceph-admin@ceph03

安装ceph-deploy

sudo yum install -y ceph-deploy python-pip

部署节点

mkdir my-cluster;cd my-cluster
ceph-deploy new ceph01 ceph02 ceph03

安装ceph包（代替ceph-deploy install node1 node2,下面命令需要在每台node上安装）

sudo wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-7
sudo yum install -y ceph ceph-radosgw

配置初始monitor(s),收集所有密钥

sudo systemctl stop firewalld;sudo systemctl disable firewalld　　#确认防火墙已关闭
ceph-deploy mon create-initial
ls -l *.keyring

把配置信息拷贝到各节点

ceph-deploy admin ceph01 ceph02 ceph03

配置osd

su - ceph-admin
cd /home/my-cluster

for dev in /dev/sdb /dev/sdc /dev/sdd
do
ceph-deploy disk zap ceph01 $dev
ceph-deploy osd create ceph01 --data $dev
ceph-deploy disk zap ceph02 $dev
ceph-deploy osd create ceph02 --data $dev
ceph-deploy disk zap ceph03 $dev
ceph-deploy osd create ceph03 --data $dev
done

sudo ceph osd tree    #查看osd

部署mgr,Luminous版以后才需要部署

ceph-deploy mgr create ceph01 ceph02 ceph03

开启dashboard模块

sudo chown -R ceph-admin /etc/ceph/
ceph mgr module enable dashboard
netstat -lntup|grep 

http://10.1.10.201:7000

删除集群

ceph-deploy purge ceph01 ceph02 ceph03
ceph-deploy purgedata ceph01 ceph02 ceph03
ceph-deploy forgetkeys

配置ceph块存储

检查是否复合块设备环境要求

uname -r
sudo modprobe rbd
echo $?

创建池和块设备

ceph osd lspools
ceph osd pool create rbd 

确定pg_num取值是强制性的，因为不能自动计算，下面是几个常用的值

少于5个OSD时,pg_num设置为128
OSD数量在5到10个时，pg_num设置为512
OSD数量在10到50个时，pg_num设置为4096
OSD数量大于50时，理解权衡方法、以及如何自己计算pg_num取值

客户端创建块设备

sudo rbd create rbd1 --size 1G --image-feature layering --name client.admin

映射块设备

sudo rbd map --image rbd1 --name client.admin

创建文件系统并挂载

fdisk -l /dev/rbd0
mkfs.xfs /dev/rbd0
mkdir /mnt/ceph-disk1
mount /dev/rbd0 /mnt/ceph-disk1
df -h /mnt/ceph-disk1

写入数据测试

dd if=/dev/zero of=/mnt/ceph-disk1/file1 count= bs=1M

配置ceph对象存储

安装ceph对象网关

ceph-deploy install --rgw ceph01 ceph02 ceph03

新建对象网关实例

ceph-deploy rgw create ceph01 ceph02 ceph03

一旦网关开始运行，你就可以通过 7480 端口来访问它（比如 http://client-node:7480）

采用fio软件压力测试

安装fio压测软件

yum install libaio-devel -y
yum install zlib-devel -y
yum install ceph-devel -y
git clone git://git.kernel.dk/fio.git
cd fio/
./configure
make;make install

测试磁盘性能

fio -direct= -iodepth= -rw=read -ioengine=libaio -bs=2k -size=100G -numjobs= -runtime= -group_reporting -
filename=/dev/rbd0 -name=readiops
fio -direct= -iodepth= -rw=write -ioengine=libaio -bs=2k -size=100G -numjobs= -runtime= -group_reporting -
filename=/dev/rbd0 -name=writeiops
fio -direct= -iodepth= -rw=randread -ioengine=libaio -bs=2k -size=100G -numjobs= -runtime= -group_reporting -
filename=/dev/rbd0 -name=randreadiops
fio -direct= -iodepth= -rw=randwrite -ioengine=libaio -bs=2k -size=100G -numjobs= -runtime= -group_reporting -
filename=/dev/rbd0 -name=randwriteiops