Grid Storage Probe¶
The check_gridstorage
probe can check file operations against grid storage
protocols, including SRM, GridFTP, LFC, and other protocols supported by
arccp
and arcls
.
The main configuration section of this probe is gridstorage
, see
Configuration Files. This probe requires an X509 proxy, see
Proxy Certificate.
Basic Invocation¶
To perform read-only checks against a URL pointing to an existing file, use:
check_gridstorage --url <url>
To perform read-write checks against an URL, use either:
check_gridstorage --url <url> --enable-write
check_gridstorage -H <hostname> --dir-url <url> --enable-write
In the latter case, the probe will add a file name based on the host name and
a time stamp. The --dir-url=<url>
option will not work correctly with the
LFC protocol, since the file name needs to be encoded inside the URL.
Performed Checks¶
The probe will do the following checks:
If writing is enabled, a small is generated at copied to the provided URL. The contents of the file includes the time and host name passed to
-H
or “localhost
”.The URL is listed and it’s checked that the listing contains the name of the uploaded file.
The file is read back.
If writing is enabled, the content is compared to what was written. Since the content contains as host name and a time stamp, it’s unlikely that an old file is accidentally matched.
If writing is enabled, the file is deleted.
Any failure in the above checks will return CRITICAL to Nagios.
Additional Options¶
If you wish to do a more thorough list-test, you can ask the probe to list the
whole directory containing the test file. This is done by passing
--list-dir
. This will use --dir-url=<url>
if specified, otherwise it
will guess the URL of the containing directory by stripping off the last
component of --url=<url>
. In any case, the listed URL must contain the
test-file. Be aware that if the directory contains many entries, the probe
may time out.
You can disable the read or list tests with --disable-read
and
--disable-list
.