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
