Boot looping after attempted virus scan

dolf

I tried to scan all PCs on my system for viruses by performing the “Virus Scan” task on a group containing all of my hosts. After specifying the task, the PCs rebooted as they should, but got stuck in a “Chainloading failed…”-loop. Cancelling the tasks had no effect. I also tried these instructions: http://www.thelazysysadmin.net/2011/01/fog-deleting-all-current-active-tasks/ The PCs still do not boot.

Running FOG 6909.

Sebastian Roth

@dolf Probably the generated iPXE script output is screwed up. Please open http://your.fog.ip.addr/fog/service/ipxe/boot.php?mac=xx:xx:xx:xx:xx:xx (put in the MAC of your client) in your browser and post the full (!) output here - mask IPs if you like but please post the full script so we know what you see!

dolf

Output of that link is attached:

0_1461238767222_output1.txt

I did not expect to see HTML… Parsing the HTML renders this beauty of an error message:
0_1461238893617_Screenshot from 2016-04-21 13:41:00.png

Sebastian Roth

@dolf Anything in the apache error log (ubuntu/debian: /var/log/apache2/error.log, redhat/centos: /var/log/httpd/error_log) when you request this URL in your browser? Just asking because the “An error occurred while invoking the map callback in…” is not very much information they give us.

dolf

Same info there:

[Thu Apr 21 15:28:18.306005 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP Stack trace:
[Thu Apr 21 15:28:18.306011 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP   1. {main}() /var/www/html/fog/service/ipxe/boot.php:0
[Thu Apr 21 15:28:18.306016 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP   2. FOGBase::getClass() /var/www/html/fog/service/ipxe/boot.php:13
[Thu Apr 21 15:28:18.306021 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP   3. ReflectionClass->newInstanceArgs() /var/www/html/fog/lib/fog/fogbase.class.php:86
[Thu Apr 21 15:28:18.306027 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP   4. BootMenu->__construct() /var/www/html/fog/lib/fog/fogbase.class.php:86
[Thu Apr 21 15:28:18.306032 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP   5. HookManager->processEvent() /var/www/html/fog/lib/fog/bootmenu.class.php:89
[Thu Apr 21 15:28:18.306037 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP   6. array_map() /var/www/html/fog/lib/fog/hookmanager.class.php:40
[Thu Apr 21 15:28:18.306042 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP   7. HookManager->{closure:/var/www/html/fog/lib/fog/hookmanager.class.php:36-40}() /var/www/html/fog/lib/fog/hookmanager.class.php:40
[Thu Apr 21 15:28:18.306048 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP   8. call_user_func:{/var/www/html/fog/lib/fog/hookmanager.class.php:38}() /var/www/html/fog/lib/fog/hookmanager.class.php:38
[Thu Apr 21 15:28:18.306053 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP   9. ChangeItems->BootItemSettings() /var/www/html/fog/lib/fog/hookmanager.class.php:38
[Thu Apr 21 15:28:18.306059 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP  10. LocationAssociation->getStorageNode() /var/www/html/fog/lib/plugins/location/hooks/changeitems.hook.php:34
[Thu Apr 21 15:28:18.306064 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP  11. FOGBase::getClass() /var/www/html/fog/lib/plugins/location/class/locationassociation.class.php:27
[Thu Apr 21 15:28:18.306069 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP  12. ReflectionClass->newInstanceArgs() /var/www/html/fog/lib/fog/fogbase.class.php:86
[Thu Apr 21 15:28:18.306074 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP  13. FOGController->__construct() /var/www/html/fog/lib/fog/fogbase.class.php:86
[Thu Apr 21 15:28:18.306079 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP  14. FOGController->load() /var/www/html/fog/lib/fog/fogcontroller.class.php:26
[Thu Apr 21 15:28:18.306084 2016] [:error] [pid 16715] [client 146.232.223.197:24145] PHP  15. array_map() /var/www/html/fog/lib/fog/fogcontroller.class.php:194

Looking at the code:

    161     protected function load($field = 'id') {
    162         $this->info(sprintf(_('Loading data to field %s'),$field));
    163         try {
    164             if (!$this->get($field)) throw new Exception(sprintf(_('Operation Field not set: %s'),$field));
    165             list($join, $where) = $this->buildQuery();
    166             array_map(function(&$key) use ($join,$where) {
    167                 $key = $this->key($key);
    168                 if (!is_array($this->get($key))) {
    169                     $query = sprintf($this->loadQueryTemplateSingle,
    170                         $this->databaseTable,
    171                         $join,
    172                         $this->databaseFields[$key],
    173                         self::$DB->sanitize($this->get($key)),
    174                         count($where) ? ' AND '.implode(' AND ',$where) : ''
    175                     );
    176                 } else {
    177                     $fields = $this->get($key);
    178                     $fieldData = array();
    179                     array_map(function(&$fieldValue) use ($key,&$fieldData) {
    180                         $fieldData[] = sprintf("`%s`.`%s`='%s'",$this->databaseTable,$this->databaseFields[$key],self::$DB->sanitize($fieldValue));
    181                         unset($fieldValue,$key);
    182                     },(array)$fields);
    183                     $query = sprintf($this->loadQueryTemplateMultiple,
    184                         $this->databaseTable,
    185                         $join,
    186                         implode(' OR ', $fieldData),
    187                         count($where) ? ' AND '.implode(' AND ',$where) : ''
    188                     );
    189                 }
    190                 if (!($vals = self::$DB->query($query)->fetch('','fetch_all')->get())) throw new Exception(self::$DB->sqlerror());
    191                 $vals = @array_shift($vals);
    192                 $this->setQuery($vals);
    193                 unset($vals,$key,$join,$where);
    194             },(array)$field);
    195         } catch (Exception $e) {
    196             $this->debug(_('Load failed: %s'),array($e->getMessage()));
    197         }
    198         return $this;
    199     }

This seems relevant: http://stackoverflow.com/a/5523561/836995 I don’t think you will get a more detailed error message using array_map(). I don’t have time to debug the code, but I can take a guess that this is happening: throw new Exception(self::$DB->sqlerror());

Don’t know why, though.

dolf

Any ideas for a quick fix, while you’re solving this problem? I wish I could contribute a solution, but I don’t have the time / energy to dive into the FOG code base at the moment.

dolf

Updated to trunk version 7645: No difference.
Changed LOCATION of PCs: Error message goes away and PC boot normally.

Sebastian Roth

@dolf said:

Changed LOCATION of PCs: Error message goes away and PC boot normally.

What exactly do you mean by that???

dolf

Oops, my post was very unclear due to the excitement of finally fixing this.

I use the location plugin. After updating the “location” field on all hosts (simultaneously using a group, not one by one), the error disappeared, and the PCs started booting normally.

Sebastian Roth

@dolf Did you have the location plugin installed/activated before? I am pretty sure this error shouldn’t happen on a clean fresh install - do you think?

dolf

Yes, I installed the location plugin a few months ago. In March, I think. I never used the virusscan feature before installing the location plugin. Don’t have the resources to try that now, either.

Sebastian Roth

Ok thanks for letting us know. So I guess we are save to solve this now.

Boot looping after attempted virus scan

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