OSD information in a scriptable format
In case you are trying to get the OSD ID and the corresponding node IP address mappings in a script-able format, use the following command:
# ceph osd find
This will print the OSD number, the IP address, the host name, and the default root in the CRUSH map, as a python dictionary.
# ceph osd find 2 { "osd": 2, "ip": "192.168.122.112:6800\/5311", "crush_location": { "host": "node4", "root": "default"}}
The output is in json format, which has a key:value format. This can be parsed using awk/sed, or any programming languages that support json. All recent ones do.
For a listing of all the OSDs and related information, get the number of OSDs in the cluster, and then use that number to probe the OSDs.
# for i in `seq 0 $(ceph osd stat | awk {'print $3'})`; do
ceph osd find $i; echo; done
This should output:
{ "osd": 0, "ip": "192.168.122.244:6805\/2579", "crush_location": { "host": "node3", "root": "ssd"}} { "osd": 1, "ip": "192.168.122.244:6800\/955", "crush_location": { "host": "node3", "root": "ssd"}} { "osd": 2, "ip": "192.168.122.112:6800\/5311", "crush_location": { "host": "node4", "root": "default"}} { "osd": 3, "ip": "192.168.122.112:6805\/5626", "crush_location": { "host": "node4", "root": "default"}} { "osd": 4, "ip": "192.168.122.82:6800\/4194", "crush_location": { "host": "node5", "root": "default"}} { "osd": 5, "ip": "192.168.122.82:6805\/4521", "crush_location": { "host": "node5", "root": "default"}} { "osd": 6, "ip": "192.168.122.73:6801\/5614", "crush_location": { "host": "node2", "root": "ssd"}} { "osd": 7, "ip": "192.168.122.73:6800\/1719", "crush_location": { "host": "node2", "root": "ssd"}} { "osd": 8, "ip": "192.168.122.10:6805\/5842", "crush_location": { "host": "node6", "root": "default"}} { "osd": 9, "ip": "192.168.122.10:6800\/4356", "crush_location": { "host": "node6", "root": "default"}} { "osd": 10, "ip": "192.168.122.109:6800\/4517", "crush_location": { "host": "node7", "root": "default"}} { "osd": 11, "ip": "192.168.122.109:6805\/4821", "crush_location": { "host": "node7", "root": "default"}}