Hi,
After discussing $verbosity values on #oscar-cluster IRC channel with DongInn,
it turned out that we need to make things clear for developers so oscar output
is coherent when a specific verbosity level is set.
Indeed, the current situation is chaotic. Some modules are extremely verbose at
level 5 while other are quite quiet.
This document is a 1st draft in helping developers how to manage oscar messages
output.
Best regards.
--
Olivier LAHAYE
CEA DRT/LIST
This document describes the verbosity levels used in OSCAR and what kind of
message each level is subject to be displayed.
The aim is to have a concistent ouput among all OSCAR components when a
verbosity level is set.
The verbosity level is a number ranging from 0 to 10: it defaults to 1.
The following flags have an impact on this level.
--quiet sets verbosity to 0
--verbose sets verbosity to 5
--debug sets verbosity to 10
0: Quiet
- No messages at all (could be used for running gui from a desktop for
example)
In that case, the errors should be displayed in the GUI or in the log file
if required.
1: Default verbosity
- Only important messages are displayed
=> concistent error messages like "Missing package foo".
=> failed sanity test foo.apb aborting.
2: Display steps
- [INFO] entering step x
- succesffully completed step x
3: Major actions are displayed
=> [INFO] Initializing OSCAR db
=> Successfully initialized OSCAR DB.
=> [INFO] Running post_rpm_install
4: Major actions details
=> running post_rpm_install(foo) ... ok/fail
=> running post_rpm_install(bar) ... ok/fail
5: --verbose flag. (displays mor technical details)
- displays what is being done like:
=> [INFO] Starting Service foo
=> [INFO] successfully started service foo
=> [INFO] Updating config file bar.conf
=> [INFO] checking sanity status for entering "step_6"
=> [ERROR] running post_rpm_install(bar) failed for the following reson
6: (display even more technical details)
- [INFO] Backing up config file before modifying it
- [INFO] Querying available nodes
- [INFO] Querying available packages
7: Also displays system() calls:
=> About to run "$cmd"
=> return code for $cmd:
8: Display DB queries and results
9: Display variable, scalars contents.
10: --debug flag
- Everything is displayed
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