konstantinpae
commented
9 years ago Hi, and again sorry for the delay. Had to work through my emails and start training new colleagues. Would it be possible to Pull against the Development Branch? In this branch Python 3 compatibility is already given and also tested using Travis CI. If this is not possible, and I will merge to the master branch but please consider for future Pull Requests to do them against the development branch. Thank you!
ghost
We created this sensor to watch the status of an MDADM Software-RAID in Linux. MDADM-Raids are very common in Linux environments especially Rootservers/Hosting evironments.
The sample output from mdadm (cat /proc/mdstat) of an healthy RAID looks like this:
Personalities : [raid1] md0 : active raid1 sda1[2] sdb1[1] 194368 blocks super 1.2 [2/2] [UU]
md1 : active raid1 sdb5[1] sda5[0] 1950656 blocks super 1.2 [2/2] [UU]
md2 : active raid1 sdb6[1] sda6[0] 1462857536 blocks super 1.2 [2/2] [UU]
Each "md*" is an array with one or many drives. Each drive are marked with an "U".
The sensor keeps it simple: We split each array in a list and search for the keywords:
If an drive is missing or faulty the output for example looks like this: md1 : active raid1 sde16 sdg1[1] sdb1[4] sdd1[3] sdc1[2] 488383936 blocks [6/4] UUUU When finding an underscore we count the counter for arrays with missing drives up.
We are doing the same when finding keywords "recovery [recovering raid integrity on same drive], resyncing [drive replaced or additional drive added to expand array], check [integrity check, sometimes executed automatically from OS].
For example recovery looks like this:
md0 : active raid1 sda1[2] sdb1[3] 2095040 blocks super 1.2 [2/1] [U_] [>....................] recovery = 0.4% (9700/2094040) finish=8.6min speed=19600K/sec