在SUSE Linux Enterprise Server 11 SP3上轻松搭建Ceph集群。
环境简介：
一个mon节点，一个mds节点，三个osd节点，分别如下
192.168.239.131 ceph-mon
192.168.239.132 ceph-mds
192.168.239.160 ceph-osd0
192.168.239.161 ceph-osd1
192.168.239.162 ceph-osd2
1、从suse.com官网注册一个账号，下载SLES 11 SP3和SUSE Cloud 4的ISO
2、给每个节点安装系统，然后设置两个安装源,一个OS，一个SUSE Cloud 4
3、配置ceph-mon到其他节点的root用户无密码登录ssh
4、复制ceph-mon节点的/etc/hosts到其他节点
5、安装ceph
zypper -n install ceph ceph-radosgw
6、在ceph-mon节点上，使用setup.sh分别调用init-mon.sh , init-osd.sh , init-mds.sh自动配置mon,osd,mds。
setup.sh和init-mon.sh会进入当前目录下的./ceph文件夹，请务必在/etc以外的目录执行。
各个脚本的代码如下(仅供参考)：
(1) setup.sh
#!/bin/bash
### Stop all existed OSD nodes
printf "Killing all ceph-osd nodes..."
for i in 0 1 2;do
ssh ceph-osd$i "killall -TERM ceph-osd"
sleep 1
done
printf "Donen"
### Initialize mon on this system
killall -TERM ceph-mon
printf "Initializing ceph-mon on current node..."
./init-mon.sh
cd ./ceph
printf "Donen"
### Initialize osd services on nodes
for i in 0 1 2;do
../init-osd.sh ceph-osd$i $i
sleep 1
done
### Initialize mds on remote node
printf "Initializing mds on ceph-mds..."
../init-mds.sh ceph-mds
printf "Donen"
(2) init-mon.sh
#!/bin/bash
fsid=$(uuidgen)
mon_node=$(hostname)
mon_ip=192.168.239.131
cluster_net=192.168.239.0/24
public_net=192.168.1.0/24
mon_data=/data/$mon_node
killall -TERM ceph-mon
rm -f /etc/ceph/ceph.conf /etc/ceph/*.keyring
rm -f /var/lib/ceph/bootstrap-mds/* /var/lib/ceph/bootstrap-osd/*
rm -f /var/log/ceph/*.log
confdir=./ceph
rm -fr $confdir
mkdir -p $confdir
cd $confdir
rm -fr $mon_data
mkdir -p $mon_data
cat > ceph.conf << EOF
[global]
fsid = $fsid
mon initial members = $mon_node
mon host = $mon_ip
public network = $public_net
cluster network = $cluster_net
auth cluster required = cephx
auth service required = cephx
auth client required = cephx
osd journal size = 1024
filestore xattr use omap = true
EOF
ceph-authtool --create-keyring bootstrap-osd.keyring --gen-key -n client.bootstrap-osd
ceph-authtool --create-keyring bootstrap-mds.keyring --gen-key -n client.bootstrap-mds
ceph-authtool --create-keyring ceph.mon.keyring --gen-key -n mon. --cap mon 'allow *'
ceph-authtool --create-keyring ceph.client.admin.keyring --gen-key -n client.admin --set-uid=0 --cap mon 'allow *' --cap osd 'allow *' --cap mds 'allow'
ceph-authtool ceph.mon.keyring --import-keyring ceph.client.admin.keyring
monmaptool --create --add $mon_node $mon_ip --fsid $(grep fsid ceph.conf | awk '{ print $NF}') monmap
cp -a ceph.conf /etc/ceph
cp -a ceph.client.admin.keyring /etc/ceph
### Make filesystem for ceph-mon
ceph-mon --mkfs -i $mon_node --monmap monmap --keyring ceph.mon.keyring --mon-data $mon_data
### Start the ceph-mon service
ceph-mon -i $mon_node --mon-data $mon_data
### Initialize bootstrap keyrings
ceph auth add client.bootstrap-mds mon 'allow profile bootstrap-mds' -i bootstrap-mds.keyring
ceph auth add client.bootstrap-osd mon 'allow profile bootstrap-osd' -i bootstrap-osd.keyring
(3) init-osd.sh
#!/bin/bash
if [ $# -lt 2 ];then
printf "Usage:$0 {host} {osd num}n" $0
exit 1
fi
host=$1
osd_num=$2
ssh $host "killall -TERM ceph-osd"
ssh $host "rm -f /var/lib/ceph/bootstrap-osd/*keyring"
ssh $host "rm -fr /data/osd.$osd_num/*"
ssh $host "mkdir -p /var/lib/ceph/bootstrap-osd"
ssh $host "mkdir -p /data/osd.$osd_num"
scp ceph.conf ceph.client.admin.keyring $host:/etc/ceph
scp bootstrap-osd.keyring $host:/var/lib/ceph/bootstrap-osd/ceph.keyring
ssh $host "ceph osd create"
ssh $host "ceph-osd -i $osd_num --osd-data /data/osd.$osd_num --osd-journal /data/osd.$osd_num/journal --mkfs --mkkey"
ssh $host "ceph auth add osd.$osd_num osd 'allow *' mon 'allow profile osd' -i /data/osd.$osd_num/keyring"
ssh $host "ceph osd crush add-bucket $host host"
ssh $host "ceph osd crush move $host root=default"
ssh $host "ceph osd crush add osd.$osd_num 1.0 host=$host"
ssh $host "ceph-osd -i $osd_num --osd-data /data/osd.$osd_num --osd-journal /data/osd.$osd_num/journal"
(4) init-mds.sh
#!/bin/bash
if [ $# -lt 1 ];then
printf "Usage:$0 {host}}n" $0
exit 1
fi
mds_host=$1
mds_name=mds.$mds_host
mds_data=/data/$mds_name
keyfile=ceph.$mds_host.keyring
mon_host=ceph-mon:6789
### Stop current running mds daemons first
ssh $mds_host "killall -TERM ceph-mds"
ssh $mds_host "rm -f $mds_data/*"
ssh $mds_host "mkdir -p $mds_data"
### Clean the old keyring file first
rm -f $keyfile
### Create new keyring file
ceph-authtool -C -g -n $mds_name $keyfile
ceph auth add $mds_name mon 'allow profile mds' osd 'allow rwx' mds 'allow' -i $keyfile
scp
/etc/ceph/ceph.conf
/etc/ceph/ceph.client.admin.keyring $mds_host:/etc/ceph
scp $keyfile $mds_host:$mds_data/keyring
ssh $mds_host "ceph-mds -i $mds_host -n $mds_name -m $mon_host --mds-data=/data/mds.$mds_host"
脚本执行完之后会自动把服务启动，在ceph-mon节点上查看ceph集群状态：
ceph-mon:~ # ceph -s
cluster 266900a9-b1bb-4b1f-9bd0-c509578aa9c9
health HEALTH_OK
monmap e1: 1 mons at {ceph-mon=192.168.239.131:6789/0}, election epoch 2, quorum 0 ceph-mon
mdsmap e4: 1/1/1 up {0=ceph-mds=up:active}
osdmap e17: 3 osds: 3 up, 3 in
pgmap v23: 192 pgs, 3 pools, 1884 bytes data, 20 objects
3180 MB used, 45899 MB / 49080 MB avail
192 active+clean
osd状态：
ceph-mon:~ # ceph osd tree
# id weight type name up/down reweight
-1 3 root default
-2 1 host ceph-osd0
0 1 osd.0 up 1
-3 1 host ceph-osd1
1 1 osd.1 up 1
-4 1 host ceph-osd2
2 1 osd.2 up 1
在ceph-mon节点上查看进程：
ceph-mon:~ # ps ax |grep ceph-mon
8993 pts/0 Sl 0:00 ceph-mon -i ceph-mon --mon-data /data/ceph-mon
在ceph-osdX节点上查看进程：
ceph-osd0:~ # ps ax | grep ceph-osd
13140 ? Ssl 0:02 ceph-osd -i 0 --osd-data /data/osd.0 --osd-journal /data/osd.0/journal
在ceph-mds节点上查看进程：
ceph-mds:~ # ps ax |grep ceph-mds
42260 ? Ssl 0:00 ceph-mds -i ceph-mds -n mds.ceph-mds -m ceph-mon:6789 --mds-data=/data/mds.ceph-mds
7、由于SLES 11系列的内核还不支持ceph模块，您需要在客户端安装较高版本的内核才能获得mount.ceph的功能。mount.ceph命令用法如下：
mount.ceph {mon ip/host}:/ {mount point} -o name=admin,secret={your keyring}
mount.ceph ceph-mon:/ /mnt/cephfs -v -o name=admin,secret=AQD5jp5UqPRtCRAAvpRyhlNI0+qEHjZYqEZw8A==
查看挂载状态：
ceph-mon:/etc/ceph # df -Ph
文件系统 容量 已用 可用 已用% 挂载点
/dev/mapper/rootvg-root 12G 5.3G 5.7G 49% /
udev 12G 5.3G 5.7G 49% /dev
tmpfs 12G 5.3G 5.7G 49% /dev/shm
/dev/sda1 185M 36M 141M 21% /boot
/dev/sdb1 16G 35M 16G 1% /data
192.168.239.131:/ 48G 3.2G 45G 7% /mnt/cephfs