2014-05-09 10:05:30.353984 mon.0 -> ‘HEALTH_OK’ (0)
并同时查看 s1、s2、s3 log可以看到，证明3个节点都正常：
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2014-05-09 09:39:32.316795 b4bfeb40 mon.a@0(leader) e1 handle_command mon_command(health v 0) v1
2014-05-09 09:39:40.789748 b4bfeb40 mon.a@0(leader).osd e35 e35: 3 osds: 3 up, 3 in
2014-05-09 09:40:00.796979 b4bfeb40 mon.a@0(leader).osd e36 e36: 3 osds: 3 up, 3 in
2014-05-09 09:40:41.781141 b4bfeb40 mon.a@0(leader) e1 handle_command mon_command(health v 0) v1
2014-05-09 09:40:42.409235 b4bfeb40 mon.a@0(leader) e1 handle_command mon_command(health v 0) v1
log 里面会看到如下时间未同步信息：
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2014-05-09 09:43:13.485212 b49fcb40 log [WRN] : message from mon.0 was stamped 6.050738s in the future, clocks not synchronized
2014-05-09 09:43:13.861985 b49fcb40 log [WRN] : message from mon.0 was stamped 6.050886s in the future, clocks not synchronized
2014-05-09 09:43:14.012633 b49fcb40 log [WRN] : message from mon.0 was stamped 6.050681s in the future, clocks not synchronized
2014-05-09 09:43:15.809439 b49fcb40 log [WRN] : message from mon.0 was stamped 6.050781s in the future, clocks not synchronized
所以我们在做集群之前最好能在集群内部做好ntp服务器，确保各节点之前时间一致。
3. 接下来在客户机s4上进行验证操作：
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root@s4:/mnt# mount -t ceph s1:6789:/ /mnt/s1fs/
root@s4:/mnt# mount -t ceph s2:6789:/ /mnt/s2fs/
root@s4:/mnt# mount -t ceph s3:6789:/ /mnt/s3fs/
root@s4:~# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda1 79G 1.3G 74G 2% /
udev 241M 4.0K 241M 1% /dev
tmpfs 100M 304K 99M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 248M 0 248M 0% /run/shm
192.168.242.130:6789:/ 60G 3.6G 56G 6% /mnt/s3fs
192.168.242.129:6789:/ 60G 3.6G 56G 6% /mnt/s2fs
192.168.242.128:6789:/ 60G 3.6G 56G 6% /mnt/s1fs</p>
<p>root@s4:/mnt/s2fs# touch aa
root@s4:/mnt/s2fs# ls -al /mnt/s1fs
total 4
drwxr-xr-x 1 root root 0 May 8 18:08 ./
drwxr-xr-x 7 root root 4096 May 8 17:28 ../
-rw-r–r– 1 root root 0 May 8 18:08 aa
root@s4:/mnt/s2fs# ls -al /mnt/s3fs
total 4
drwxr-xr-x 1 root root 0 May 8 18:08 ./
drwxr-xr-x 7 root root 4096 May 8 17:28 ../
-rw-r–r– 1 root root 0 May 8 18:08 aa</p>
<p>root@s4:/mnt/s2fs# rm -f aa
root@s4:/mnt/s2fs# ls -al /mnt/s1fs/
total 4
drwxr-xr-x 1 root root 0 May 8 2014 ./
drwxr-xr-x 7 root root 4096 May 8 17:28 ../
root@s4:/mnt/s2fs# ls -al /mnt/s3fs/
total 4
drwxr-xr-x 1 root root 0 May 8 18:07 ./
drwxr-xr-x 7 root root 4096 May 8 17:28 ../
接下来我们验证单点故障：
将s1服务停掉，
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root@s1:~# /etc/init.d/ceph stop
=== mon.a ===
