Ceph —— 均衡PG

 1 #!/usr/bin/python
 2 
 3 import os
 4 
 5 
 6 def Ceph_balance():
 7     # Gets the PG number for each OSD
 8     PGS = os.popen(""" ceph osd df | awk ‘{print $10}‘ | egrep -v "^$|PGS" """).readlines()
 9     # Get the max difference of PG number
10     MAX_DIFFERENT_PG = max(map(eval, PGS)) - min(map(eval, PGS))
11     # Get pool list
12     lspools = os.popen(‘ceph osd lspools‘).read().split(‘,‘)[:-1]
13     POOL_LIST = map(lambda x: x[2:], lspools)
14     # To allow use of the feature, you must tell the cluster that it only needs to support luminous (and newer) clients with: 
15     os.system(‘ceph osd set-require-min-compat-client luminous‘)
16     if MAX_DIFFERENT_PG >= 1:
17         # Grab the latest copy of your osdmap
18         os.system(‘ceph osd getmap -o /tmp/osd.map‘)
19         for i in POOL_LIST:
20             # Run the optimizer
21             os.system(‘osdmaptool /tmp/osd.map --upmap /tmp/%sout.txt --upmap-pool %s‘ % (i, i))
22         for i in POOL_LIST:
23             # Apply the changes to the cluster
24             os.system(‘source /tmp/%sout.txt‘ % i)
25     # clean up txt file
26     for i in POOL_LIST:
27         os.system(‘rm -f /tmp/%sout.txt‘ % i)
28     os.system(‘rm -f /tmp/osd.map‘)
29     print("Ceph balance has been successful !")
30 
31 
32 if __name__ == ‘__main__‘:
33     Ceph_balance()