ERROR: No DS called 'value' in ... disk_io_time.rrd'

[igittigitthub]

My CGP can't create disk_io_time graphs. Everything else is working fine.

I already checked the file CGP/plugin/disk.json. The DS entries io_time and weighted_io_time are correct. 😕

My version:

root@collectd:/var/www/html/CGP# git show --oneline -s
1920ca2 Merge pull request #162 from Self-Perfection/patch-1

Command:

root@collectd:/var/www/html/CGP# rrdtool info '/var/lib/collectd/rrd/xxx/disk-ST4000VN000-1H4168_XXXXXXXX/disk_io_time.rrd' | grep "ds\["

Output:

ds[io_time].index = 0
ds[io_time].type = "DERIVE"
ds[io_time].minimal_heartbeat = 20
ds[io_time].min = 0.0000000000e+00
ds[io_time].max = NaN
ds[io_time].last_ds = "2674344"
ds[io_time].value = 5.3984000000e+03
ds[io_time].unknown_sec = 0
ds[weighted_io_time].index = 1
ds[weighted_io_time].type = "DERIVE"
ds[weighted_io_time].minimal_heartbeat = 20
ds[weighted_io_time].min = 0.0000000000e+00
ds[weighted_io_time].max = NaN
ds[weighted_io_time].last_ds = "5529692"
ds[weighted_io_time].value = 8.5504000000e+03
ds[weighted_io_time].unknown_sec = 0

Error in logfile /var/log/apache2/error.log:

ERROR: No DS called 'value' in '/var/lib/collectd/rrd/xxx/disk-ST4000VN000-1H4168_XXXXXXXX/disk_io_time.rrd'

My collectd version is: 5.7.2-2ubuntu1

[Benoît Chauvet]

I've got the same issue, and finally found a solution.
You certainly has a data_type line in /etc/collectd/my_types.db , included in /etc/collectd/collectd.conf (TypesDB parameter) defining these metrics, with this content :

disk         io_time:DERIVE:0:U, weighted_io_time:DERIVE:0:U

You must :

• Copy this file to /usr/www/<your_CGP_root>/inc/my_types.db
• Add the following line in your config file /usr/www/<your_CGP_root>/conf/config.local.php :

$CONFIG['typesdb'][] = 'inc/my_types.db';

Note : unfortunately, you cannot use an absolute path here, thus have a direct reference to the file (which is used by collected) located in /etc/collectd/ will not work.