Bug #8572
closed
Report "missing" on directive using json variable
Description
Hello,
After executing successfully directive using variable loaded from "CFEngine variable definition using a JSON file" technique, the report is "missing".
The directive is"echo ${corp.admin_infra[username]} > /tmp/admin_infra", corp.admin_infra is loaded from a json file.
It seems that the value of ${corp.admin_infra[username]} is not known at the generation of the report (${reports[ 2][canon]} in rudder_exepected_reports.csv.res) :
cat /var/rudder/cfengine-community/inputs/rudder_expected_reports.csv
# Format: technique_name;;class_prefix_${key};;@@RUDDER_ID@@;;component name;;component key
dump_admin_infra;;command_execution_echo ${corp.admin_infra[username]} > /tmp/admin_infra;;beac8ec7-4d2a-4844-abce-929b6c5eb1f7@@366717a1-2c5a-4aa8-b4e6-dbeef5de175c@@36;;Command execution;;echo ${corp.admin_infra[username]} > /tmp/admin_infra
cat /var/rudder/cfengine-community/inputs/rudder_expected_reports.csv.res
dump_admin_infra;;${reports[2][canon]};;beac8ec7-4d2a-4844-abce-929b6c5eb1f7@@366717a1-2c5a-4aa8-b4e6-dbeef5de175c@@36;;Command execution;;echo ${corp.admin_infra[username]} > /tmp/admin_infra;;${reports[2][5]};;${reports[2][6]}
Uninstall_vmware_tools;;command_execution__usr_bin_vmware_uninstall_tools_pl;;beac8ec7-4d2a-4844-abce-929b6c5eb1f7@@ac2e3d5f-4843-4f12-b540-6e6c19850b04@@36;;Command execution;;/usr/bin/vmware-uninstall-tools.pl;;${reports[1][5]};;${reports[1][6]}
Uninstall_vmware_tools;;condition_from_command_vmware_tools;;beac8ec7-4d2a-4844-abce-929b6c5eb1f7@@ac2e3d5f-4843-4f12-b540-6e6c19850b04@@36;;Condition from command ;;vmware-tools;;${reports[0][5]};;${reports[0][6]}
Thanks,
Updated by Nicolas CHARLES over 8 years ago
Hi arnaud,
I reproduced the issue - I don't understand yet why it happens, I'm working on it.
Updated by Nicolas CHARLES over 8 years ago
Here the issue is that "${corp.admin_infra[username]}" is not yet defined when the ncf logs are computed.
ncf logs are computed at the first call of a generic methods, after promises are generated. So we have two blocking points here:
- first time directive is created, the file is not downloaded, so the variable cannot be read, so it has no value
- at next policy generation, the json file is downloaded, so it could read it. BUT the directive variableFromJsonFile first calls generic method "directory_create", creating all the logs for ncf. The variable wasn't read yet - it can't be used for reporting
So, in a nutshell, with current implementation, we can't report in techniques made with the Technical Editor with json variables created in variable from json file
Updated by Nicolas CHARLES over 8 years ago
After discussing with Benoît, we arrived at a working solution (in theory)
The idea would be to stop evaluating the canonified variable at the start of the run, so basically keeping only the .tmp file
At log execution, we would read all reports for the current_technique_report_info (with the benefit of having it done only once per technique, rather than once per report, so maybe a perf improvement), and extract the lines that match the passed canonified class
So we don't have the issue of early/late evaluation: reports using variables are evaluated when they are used
Updated by Benoît PECCATTE almost 8 years ago
- User visibility set to Operational - other Techniques | Technique editor | Rudder settings
Updated by François ARMAND over 7 years ago
- Severity set to Major - prevents use of part of Rudder | no simple workaround
Updated by Jonathan CLARKE over 7 years ago
It seems it would make sense to run all "Variable " loading Techniques *before other directives.
Updated by Nicolas CHARLES over 5 years ago
- Status changed from New to Rejected
- Priority changed from 43 to 0
This was because of the way reporting was done in pre-5.0. We don't have the csv file anymore, so it's working as expected now