由 dawei
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
ASP站长网创建用户和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 0440 /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
编辑ceph.conf配置文件
echo >>/home/ceph-admin/my-cluster/ceph.conf<<EOF
public network = 10.1.10.0/16
cluster network = 10.1.10.0/16
EOF
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
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
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 7000
http://10.1.10.201:7000
配置ceph块存储
检查是否复合块设备环境要求
uname -r
modprobe rbd
echo $?
创建池和块设备
ceph osd lspools
ceph osd pool create rbd 128
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
rbd create rbd1 --size 1G --image-feature layering --name client.admin
映射块设备
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=100 bs=1M
采用fio软件压力测试
安装fio压测软件
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=1 -iodepth=1 -rw=read -ioengine=libaio -bs=2k -size=100G -numjobs=128 -runtime=30 -group_reporting -
filename=/dev/rbd0 -name=readiops
fio -direct=1 -iodepth=1 -rw=write -ioengine=libaio -bs=2k -size=100G -numjobs=128 -runtime=30 -group_reporting -
filename=/dev/rbd0 -name=writeiops
fio -direct=1 -iodepth=1 -rw=randread -ioengine=libaio -bs=2k -size=100G -numjobs=128 -runtime=30 -group_reporting -
filename=/dev/rbd0 -name=randreadiops
fio -direct=1 -iodepth=1 -rw=randwrite -ioengine=libaio -bs=2k -size=100G -numjobs=128 -runtime=30 -group_reporting -
filename=/dev/rbd0 -name=randwriteiops