Add system status report including tasks with cli status script

1) Visit the new report page: /report/status/index.php On a properly running site confirm everything is green 2) Run the cli and confirm it is OK php admin/cli/checks.php OK: All 'status' checks ok Confirm that the shell error code was 0: $ echo $? 0 3) Run it in verbose mode   Lets break everything 4) Break environment check, edit admin/environment.xml, find the moodle version 3.9 php version required (line 2998) and change it to php version 17, confirm it is an error: Now undo this. 5) Simulate a pending upgrade, bump the version.php and confirm the error: Also confirm that the shell error code was 2 which is an NRPE critical error: $ echo $? 2 6) Turn cron off. Now simulate it having never run and confirm the error: php admin/cli/cfg.php --component=tool_task --name=lastcronstart --unset 7) Simulate it having run 40 hours ago and confirm an error:   $ php admin/cli/cfg.php --component=tool_task --name=lastcronstart --set=`date -d '40 hour ago' + '%s' ` $ php admin/cli/checks.php CRITICAL: Cron running (tool_task_cronrunning) Status | Check ----------+-------------------------------------------------------------------- CRITICAL | Cron running (tool_task_cronrunning) | The admin/cron.php script has not been run for 1 day 16 | hours and should run every 1 min.   8) Simulate it having run 1 hour ago and confirm an warning   $ php admin/cli/cfg.php --component=tool_task --name=lastcronstart --set=`date -d '1 hour ago' +'%s'` $ php admin/cli/checks.php WARNING: Cron running (tool_task_cronrunning) Status | Check ----------+-------------------------------------------------------------------- WARNING | Cron running (tool_task_cronrunning) | The admin/cron.php script has not been run for 1 hour and | should run every 1 min.  Also confirm that the shell error code was 1 which is an NRPE warning: $ echo $? 1  9) Make it good again, and confirm it is ok   $ php admin/cli/cfg.php --component=tool_task --name=lastcronstart --set=`date -d '1 sec ago' +'%s'` $ php admin/cli/checks.php OK: All 'status' checks ok  10) Now simulate gaps between cron    $ php admin/cli/cfg.php --component=tool_task --name=lastcroninterval --set= 600 $ php admin/cli/checks.php WARNING: Cron running (tool_task_cronrunning) Status | Check ----------+-------------------------------------------------------------------- WARNING | Cron running (tool_task_cronrunning) | There was 10 mins between the last two runs of the cron | maintenance script and it should run every 1 min. We | recommend configuring it to run more frequently.  10) Install  https://github.com/catalyst/moodle-tool_testtasks 11) Queue up some tasks: php admin/tool/testtasks/cli/queue_adhoc_tasks.php 12) Confirm these appear as INFO: $ php admin/cli/checks.php -v --filter=adhoc   13) Drop into sql and fudge the dates to be slightly old and confirm you get a warning: update mdl_task_adhoc set nextruntime = round(extract(epoch from now()) - 60 * 10);   14) Fudge them to be older and confirm you get a warning update mdl_task_adhoc set nextruntime = round(extract(epoch from now()) - 60 * 60); 15) Update the warning and error threshold and retest: php admin/cli/cfg.php --name=adhoctaskagewarn --set=500 php admin/cli/cfg.php --name=adhoctaskageerror --set=600