Unlock a ceph dashboard user via commandline.
ceph dashboard ac-user-enable <username>
example with admin user
ceph dashboard ac-user-enable admin
https://docs.ceph.com/en/quincy/mgr/dashboard/#enable-a-locked-user
We have two options to get the gateway.conf:
gwcli export mode=copy
or
rados -p iscsi get gateway.conf /root/gateway.conf
At the moment there is no way to update or write the gateway.conf via gwcli command. So the only option is to use the rados command line tool.
Be careful when editing the content manually, it requires care and expertise.
monclient(hunting): handle_auth_bad_method server allowed_methods [2] but i only support [2]
We see this example again and again with customers who copy their keyring file directly from the output of:
ceph auth ls
In the client.\<name\>.keyring the name is enclosed in square brackets and the key is separated by an equal sign and in the ceph auth ls by a colon.
interesting insights into how dependency on external operating system libraries can affect the operation of Ceph.
When configuring osd in mixed setup with db and wal colocated on a flash device, ssd or NVMe. There were always changes and irritations where the DB and the WAL are really located.
With a simple test it can be checked:
The location of the DB for the respective OSD can be verified via
ceph osd metadata osd.<id> and the variable "bluefs_dedicated_db": "1".
The WAL was created separately in earlier Ceph versions and automatically on the same device as the DB in later Ceph versions.
The WAL can be easily tested by using the ceph osd.<id> tell bench command.
First you check larger write operations with the command:
ceph tell osd.0 bench 65536 409600
Second, you check with smaller objects that are smaller than the bluestore_prefer_deferred_size_hdd (64k).
ceph tell osd.0 bench 65536 4096
If you compare the IOPs of the two tests, one result should correspond to the IOPs of an SSD and the other result should be quite low for the HDD. From this you can know if the WAL is on the HDD or the flash device.
for date in \`ceph pg dump | grep active | awk '{print $20}'\`; do date +%A -d $date; done | sort | uniq -c
19088 Monday
1752 Saturday
54296 Sunday
for date in \`ceph pg dump | grep active | awk '{print $21}'\`; do date +%H -d $date; done | sort | uniq -c
dumped all
3399 00
3607 01
2449 02
2602 03
6145 04
4907 05
4986 06
3777 07
2421 08
2429 09
2478 10
2546 11
2523 12
2614 13
2661 14
2722 15
2669 16
2649 17
2656 18
2751 19
2780 20
2893 21
3157 22
3315 23