ceph 常见问题百科全书---luminous安装部署篇

1. 执行步骤：ceph-deploy new node        机器：centos 7.5   ceph  Luminous版本     源：阿里云

问题： Traceback (most recent call last):
  File "/usr/bin/ceph-deploy", line 18, in <module>
    from ceph_deploy.cli import main
  File "/usr/lib/python2.7/site-packages/ceph_deploy/cli.py", line 1, in <module>
    import pkg_resources
ImportError: No module named pkg_resources

解决办法：python 版本问题  ，注意检查系统的python版本，此处ceph-deploy实则为通过执行python脚本来实现安装，

更改/usr/bin/ceph-deploy文件中   更改python2.6的部分为2.7（此处应当与系统python版本相同）   更改第一行文件为#！/usr/bin/python2.7  重新执行ceph-deploy new即可

2. 执行步骤 ：ceph-deploy disk zap node12:sdb

问题：[ceph_deploy][ERROR ] RuntimeError: zap command needs both HOSTNAME and DISK but got "None node12:sdb"

解决办法：ceph-deploy disk zap node12   /dev/sdb注意中间是空格，一个是名称，一个是设备

3.执行：ceph-deploy disk list node12

问题：[ceph_deploy][ERROR ] Traceback (most recent call last):

[ceph_deploy][ERROR ]   File "/usr/lib/python2.7/site-packages/ceph_deploy/util/decorators.py", line 69, in newfunc
[ceph_deploy][ERROR ]     return f(*a, **kw)
[ceph_deploy][ERROR ]   File "/usr/lib/python2.7/site-packages/ceph_deploy/cli.py", line 164, in _main
[ceph_deploy][ERROR ]     return args.func(args)
[ceph_deploy][ERROR ]   File "/usr/lib/python2.7/site-packages/ceph_deploy/osd.py", line 434, in disk
[ceph_deploy][ERROR ]     disk_list(args, cfg)
[ceph_deploy][ERROR ]   File "/usr/lib/python2.7/site-packages/ceph_deploy/osd.py", line 376, in disk_list
[ceph_deploy][ERROR ]     distro.conn.logger(line)
[ceph_deploy][ERROR ] TypeError: 'Logger' object is not callable
[ceph_deploy][ERROR ]

解决办法：待解决 这个是为了查看当前所有空闲盘用的，当拟清楚所有盘的情况时可以不执行。

4.执行：[root@node12 my-cluster]# ceph-deploy disk zap node12 /dev/sdb

问题：[ceph_deploy][ERROR ] Traceback (most recent call last):
[ceph_deploy][ERROR ]   File "/usr/lib/python2.7/site-packages/ceph_deploy/util/decorators.py", line 69, in newfunc
[ceph_deploy][ERROR ]     return f(*a, **kw)
[ceph_deploy][ERROR ]   File "/usr/lib/python2.7/site-packages/ceph_deploy/cli.py", line 164, in _main
[ceph_deploy][ERROR ]     return args.func(args)
[ceph_deploy][ERROR ]   File "/usr/lib/python2.7/site-packages/ceph_deploy/osd.py", line 438, in disk
[ceph_deploy][ERROR ]     disk_zap(args)
[ceph_deploy][ERROR ]   File "/usr/lib/python2.7/site-packages/ceph_deploy/osd.py", line 336, in disk_zap
[ceph_deploy][ERROR ]     if args.debug:
[ceph_deploy][ERROR ] AttributeError: 'Namespace' object has no attribute 'debug'
[ceph_deploy][ERROR ]

解决：vim /usr/lib/python2.7/site-packages/ceph_deploy/osd.py

修改第336行为

#if args.debug:
        if False:

5.执行：ceph-deploy --overwrite-conf osd create node231:vdb

问题：[ceph_deploy][ERROR ] NeedDiskError: Must supply disk/path argument: node12:sdb

解决：在ceph luminous中创建bluestore的过程为指定data，block-db，block-wal

例如执行ceph-deploy osd create node1 --data /dev/sde --block-db /dev/sdf1 --block-wal /dev/sdf2

省略db 与wal的说明，只指定data则为ceph-deploy  osd create node1 --data /dev/sdb则创建于同一个盘

6执行 ：ceph -s

问题： health: HEALTH_WARN
            no active mgr

解决：Ceph Manager Daemon，简称ceph-mgr。 该组件的主要作用是分担和扩展monitor的部分功能，减轻monitor的负担，让更好地管理ceph存储系统ceph

ceph在 luminous中新加入了mgr功能模块，手动安装mgr即可

ceph-deploy  mgr  create  node01  node02 node03

7.crush rule 常用命令记录

ceph osd getcrushmap -o /tmp/crush

crushtool -d /tmp/crush -o /tmp/crush.txt

crushtool -c /tmp/crush.txt -o /tmp/crush.bin

ceph osd setcrushmap -i /tmp/crush.bin