查看 Ceph 客户端所见
shan
标题可能有点奇怪且具有误导性，但我找不到比这更好的了 :). 这里的想法是深入了解具有映射 RBD 设备的每个客户端的内核客户端所见的内容。 在本文中，我们专注于内核 RBD 功能。
为了查看内容，您需要调整一些调试值。 因此，您需要在 ceph.conf 中添加以下内容
[mon]
...
debug ms = 1
...
[osd]
...
debug ms = 1
然后，您可以创建并映射设备，如下所示
$ rbd create foo -s 10240
$ rbd map foo
/dev/rbd0
由于我们提高了调试级别，您应该已经注意到我们在 /sys/kernel/debug/ceph/ 中有一个客户端目录。
$ sudo ls /sys/kernel/debug/ceph/dee72d38-cd8b-42c1-93c1-3be0698206ca.client24166/
monc monmap osdc osdmap
正如您所见，我们有客户端将用于与集群交互的几个关键信息。 存在诸如 OSD 映射之类的重要文件
$ sudo cat /sys/kernel/debug/ceph/dee72d38-cd8b-42c1-93c1-3be0698206ca.client24166/osdmap
epoch 68
flags
pool 0 pg_num 64 (63) read_tier -1 write_tier -1
osd0 10.143.114.189:6800 100% (exists, up) 100%
osd1 10.143.114.187:6800 100% (exists, up) 100%
osd2 10.143.114.186:6800 100% (exists, up) 100%
osd3 10.143.114.188:6800 100% (exists, up) 100%
osd4 10.143.114.186:6804 100% (exists, up) 100%
osd5 10.143.114.187:6804 100% (exists, up) 100%
osd6 10.143.114.188:6804 100% (exists, up) 100%
osd7 10.143.114.189:6804 100% (exists, up) 100%
osd8 10.143.114.187:6808 100% (exists, up) 100%
osd9 10.143.114.188:6808 100% (exists, up) 100%
osd10 10.143.114.189:6808 100% (exists, up) 100%
osd11 10.143.114.186:6808 100% (exists, up) 100%
osd12 10.143.114.188:6812 100% (exists, up) 100%
osd13 10.143.114.189:6812 100% (exists, up) 100%
osd14 10.143.114.187:6812 100% (exists, up) 100%
osd15 10.143.114.186:6812 100% (exists, up) 100%
osd16 10.143.114.188:6816 100% (exists, up) 100%
osd17 10.143.114.189:6816 100% (exists, up) 100%
osd18 10.143.114.186:6806 100% (exists, up) 100%
osd19 10.143.114.187:6801 100% (exists, up) 100%
以及监视器映射
$ sudo cat /sys/kernel/debug/ceph/dee72d38-cd8b-42c1-93c1-3be0698206ca.client24166/monmap
epoch 1
mon0 10.143.114.185:6789
mon1 10.143.114.186:6789
mon2 10.143.114.187:6789
就这样了！