检查OSD哪些配置有别于默认配置
在Ceph集群中，如果想看一下你自定义的一些配置可以通过如下命令完成：
$ sudo ceph daemon osd.1 config diff
{
"diff": {
"current": {
"auth_client_required": "cephx",
"cephx_cluster_require_signatures": "true",
"cluster_addr": "10.143.114.186:0\/0",
"cluster_network": "10.143.114.128\/26",
"filestore_merge_threshold": "40",
"filestore_op_threads": "8",
"filestore_split_multiple": "8",
"fsid": "4a158d27-f750-41d5-9e7f-26ce4c9d2d45",
"internal_safe_to_start_threads": "true",
"keyring": "\/var\/lib\/ceph\/osd\/ceph-1\/keyring",
"leveldb_log": "",
"log_to_stderr": "false",
"max_open_files": "131072",
"osd_journal_size": "10240",
"osd_max_backfills": "2",
"osd_op_threads": "8",
"osd_pool_default_crush_rule": "0",
"osd_pool_default_min_size": "1",
"osd_pool_default_pg_num": "128",
"osd_pool_default_pgp_num": "128",
"osd_pool_default_size": "2",
"osd_recovery_max_active": "5",
"osd_recovery_max_chunk": "1048576",
"osd_recovery_op_priority": "2",
"pid_file": "\/var\/run\/ceph\/osd.1.pid",
"public_addr": "10.143.114.186:0\/0",
"public_network": "10.143.114.128\/26"
},
"defaults": {
"auth_client_required": "cephx, none",
"cephx_cluster_require_signatures": "false",
"cluster_addr": ":\/0",
"cluster_network": "",
"filestore_merge_threshold": "10",
"filestore_op_threads": "2",
"filestore_split_multiple": "2",
"fsid": "00000000-0000-0000-0000-000000000000",
"internal_safe_to_start_threads": "false",
"keyring": "\/etc\/ceph\/ceph.osd.1.keyring,\/etc\/ceph\/ceph.keyring,\/etc\/ceph\/keyring,\/etc\/ceph\/keyring.bin",
"leveldb_log": "\/dev\/null",
"log_to_stderr": "true",
"max_open_files": "0",
"osd_journal_size": "5120",
"osd_max_backfills": "10",
"osd_op_threads": "2",
"osd_pool_default_crush_rule": "-1",
"osd_pool_default_min_size": "0",
"osd_pool_default_pg_num": "8",
"osd_pool_default_pgp_num": "8",
"osd_pool_default_size": "3",
"osd_recovery_max_active": "15",
"osd_recovery_max_chunk": "8388608",
"osd_recovery_op_priority": "10",
"pid_file": "",
"public_addr": ":\/0",
"public_network": ""
}
},
"unknown": []
}通过ceph命令可以知道任意osd的配置，和ceph里面的默认配置，命令如下
ceph -n osd.4 --show-config #查看osd4的配置
ceph --show-config --conf /dev/null #查看系统的默认配置