Sorry to come to this party so late, but the script as presented at
https://community.hortonworks.com/articles/38149/how-to-create-and-register-custom-ambari-alerts.html doesn't work on CentOS7 + Python 2.7 + Ambari 2.6.2.2. I can write a mean bash script, but I'm not a Python coder. In spite of my deficiencies, I got things working.
As Dmitro implies, the script by default tries to asses utilization of all mounts, not just mounted block devices - and when you're looking at shared memory or proc objects and similar, that quickly becomes problematic. The solution posted here - a custom list of mount points - works, but isn't flexible. Without extensive rewriting of the script, it would be better to just strip out things like '/sys', '/proc', '/dev', and '/run'. We also need to strip out net_prio and cpuacct.
So, with the understanding that there's almost certainly a better way to do this, I changed: print "mountPoints = " + mountPoints
mountPointsList = mountPoints.split(",")
print mountPointsList
for l in mountPointsList: to: print "mountPoints = " + mountPoints
mountPointsList = mountPoints.split(",")
mountPointsList = [ x for x in mountPointsList if not x.startswith('net_pri')]
mountPointsList = [ x for x in mountPointsList if not x.startswith('cpuacc')]
mountPointsList = [ x for x in mountPointsList if not x.startswith('/sys')]
mountPointsList = [ x for x in mountPointsList if not x.startswith('/proc')]
mountPointsList = [ x for x in mountPointsList if not x.startswith('/run')]
mountPointsList = [ x for x in mountPointsList if not x.startswith('/dev')]
print mountPointsList
for l in mountPointsList: And it works. It's perhaps also worth noting that to get the script to run from the command line, you'll need to link several library directory structures, similar to: ln -s /usr/lib/ambari-server/lib/resource_management /usr/lib/python2.7/site-packages/
ln -s /usr/lib/ambari-server/lib/ambari_commons /usr/lib/python2.7/site-packages/
ln -s /usr/lib/ambari-server/lib/ambari_simplejson /usr/lib/python2.7/site-packages/ After that, you can do like so: # python test_alert_disk_space.py
mountPoints = ,/sys,/proc,/dev,/sys/kernel/security,/dev/shm,/dev/pts,/run,/sys/fs/cgroup,/sys/fs/cgroup/systemd,/sys/fs/pstore,/sys/fs/cgroup/cpu,cpuacct,/sys/fs/cgroup/net_cls,net_prio,/sys/fs/cgroup/hugetlb,/sys/fs/cgroup/blkio,/sys/fs/cgroup/devices,/sys/fs/cgroup/perf_event,/sys/fs/cgroup/freezer,/sys/fs/cgroup/cpuset,/sys/fs/cgroup/memory,/sys/fs/cgroup/pids,/sys/kernel/config,/,/sys/fs/selinux,/proc/sys/fs/binfmt_misc,/dev/mqueue,/sys/kernel/debug,/dev/hugepages,/data,/boot,/proc/sys/fs/binfmt_misc,/run/user/1000,/run/user/0
['', '/', '/data', '/boot']
---------- l :
FINAL finalResultCode CODE .....
---------- l : /
/
disk_usage.total
93365735424
=>OK
FINAL finalResultCode CODE .....OK
---------- l : /data
/data
disk_usage.total
1063256064
=>OK
FINAL finalResultCode CODE .....OK
---------- l : /boot
/boot
disk_usage.total
1063256064
=>OK
FINAL finalResultCode CODE .....OK
... View more
