Add alarmed process audit to Process Monitor
A failure to query process monitor alarms from
FM during process startup can lead to a stuck
failed process alarm.
Rather than hold up the process monitor startup
sequence due to an unresponsive fault manager,
this update introduces an in-service alarm audit
that looks for asserted alarms and compares that
readout to the process monitor's runtime view.
A difference in view is considered a state mismatch
that requires corrective action. The runtime state
of the process monitor always takes precidence over
what is found in the FM database.
A mismatch is declared and corrective action is
taken if:
- FM has a process failure alarm that pmond does not
Corrective Action: Clear alarm in FM database
- FM has a process failure alarm with a severity
that differs from the pmond runtime state.
Corrective Action: Update severity in FM database
- FM has a process failure alarm for a process
that pmond does not recognize.
Corrective Action: Clear alarm in FM database
This update only runs the audit on process startup
until first successful query.
A future update may enable the audit in-service.
Test Plan:
PASS: Verify all mismatch case handling
PASS: Verify handling of valid active alarm
PASS: Verify handling severity mismatch ; unsupported
PASS: Verify pmond failure handling regression soak
PASS: Verify pmond process restart regression soak
PASS: Verify alarm handling over pmond process restart
PASS: Verify alarmed state audit period and logging
PASS: Verify pmond process failure alarm remains ignored by pmond
PASS: Verify handling of persistently failed process over pmond restart
PASS: Verify audit handling while FM is not running
- audit retries every 50 seconds until fm query is successful
COND: Verify audit handling while FM is stopped/blocked/stalled
- alarm query blocks till fm runs again or is killed
- this is the reason the audit is not run in-service.
Change-Id: I697faa804dc7979fbb8b6f6c63811a6dda8c3118
Closes-Bug: 1892884
Signed-off-by: Eric MacDonald <eric.macdonald@windriver.com>
This commit is contained in:
Eric MacDonald
parent
edafeef57a
commit
6cf5e84825
@ -231,6 +231,7 @@ typedef struct
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recovery_method_type recovery_method ; /**< How processes are recovered */
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bool reload_config ;
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bool patching_in_progress ;
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bool last_alarm_query_pass;
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} pmon_ctrl_type ;
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void pmon_set_ctrl_ptr ( pmon_ctrl_type * ctrl_ptr );
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@ -97,38 +97,46 @@ EFmAlarmSeverityT pmonAlarm_state ( string hostname, pmon_alarm_id_enum id )
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/******************************************************************************
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*
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* Name : manage_queried_alarms
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* Name : query_alarms
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*
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* Description: query FM for all the existing process monitor alarms and build
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* up the callers 'saved_alarm_list' with those process names and
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* corresponding severity.
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*
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* Assumptions: If the hostname is passed in as not empty then assume the clear
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* is requested.
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*
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* Updates : callers saved_alarm_list
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*
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* Returns : PASS if FM returns no error
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* FAIL_REQUEST ... alarmUtil_query_identity failed
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* FAIL_OPERATION ... fm_get_fault failed
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* FAIL_NULL_POINTER ... failed to get memory
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*
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******************************************************************************/
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void manage_queried_alarms ( list<active_process_alarms_type> & saved_alarm_list, string hostname )
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int query_alarms ( list<active_process_alarms_type> & saved_alarm_list, string hostname )
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{
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static const char HOSTNAME_LABEL [] = "host=" ;
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static const char PROCNAME_LABEL [] = ".process=" ;
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int rc = FAIL ;
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saved_alarm_list.clear();
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/**
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* Query all the pmon alarms and if there is an alarm for a
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* process that is functioing properly then clear the alarm.
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**/
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SFmAlarmDataT * alarm_list_ptr = (SFmAlarmDataT*) malloc ((sizeof(SFmAlarmDataT)*PMON_MAX_ALARMS));
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if ( alarm_list_ptr )
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{
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if ( alarmUtil_query_identity ( pmonAlarm_getId_str(PMON_ALARM_ID__PMOND), alarm_list_ptr, PMON_MAX_ALARMS ) == PASS )
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/* Query all the pmon alarms */
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rc = alarmUtil_query_identity ( pmonAlarm_getId_str(PMON_ALARM_ID__PMOND), alarm_list_ptr, PMON_MAX_ALARMS );
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if ( rc == RETRY )
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{
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dlog ("no %s alarms found", pmonAlarm_getId_str(PMON_ALARM_ID__PMOND).c_str());
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rc = PASS ;
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}
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else if ( rc == PASS )
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{
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for ( int i = 0 ; i < PMON_MAX_ALARMS ; ++i )
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{
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/* loop over each active alarm and maintain its activity state */
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if ( strnlen ((alarm_list_ptr+i)->entity_instance_id , MAX_FILENAME_LEN ) )
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{
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int rc ;
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AlarmFilter alarm_filter ;
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SFmAlarmDataT alarm_query ;
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memset(&alarm_query, 0, sizeof(alarm_query));
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@ -139,22 +147,36 @@ void manage_queried_alarms ( list<active_process_alarms_type> & saved_alarm_lis
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if (( rc = fm_get_fault ( &alarm_filter, &alarm_query )) == FM_ERR_OK )
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{
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string entity = alarm_filter.entity_instance_id ;
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size_t pos = entity.find("process=");
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if ( pos != std::string::npos )
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{
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string pn = entity.substr(pos+strlen("process="));
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ilog ("%s alarm is %s (process:%s)\n", alarm_filter.entity_instance_id,
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alarmUtil_getSev_str(alarm_query.severity).c_str(), pn.c_str());
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rc = PASS ;
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/* filter out 'process=pmond' as that alarm is handled by hbsAgent */
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if ( pn.compare("pmond") )
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string entity = alarm_filter.entity_instance_id ;
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size_t pos_hn = entity.find(HOSTNAME_LABEL);
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size_t pos_pn = entity.find(PROCNAME_LABEL);
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if (( pos_hn != std::string::npos ) &&
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( pos_pn != std::string::npos ))
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{
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if ( !hostname.empty() )
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string hn = entity.substr(pos_hn+strlen(HOSTNAME_LABEL), pos_pn-strlen(HOSTNAME_LABEL));
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string pn = entity.substr(pos_pn+strlen(PROCNAME_LABEL));
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/* verify hostname */
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if ( ( hn.length() == 0 ) || ( hn != hostname ) )
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{
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pmonAlarm_clear ( hostname, PMON_ALARM_ID__PMOND, pn );
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/* ignore alarms not for this host */
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dlog ("%s %s %s alarm not for this host",
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entity.c_str(),
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hn.c_str(),
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pn.c_str());
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continue ;
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}
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else
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dlog ("%s alarm is %s (process:%s)\n",
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alarm_filter.entity_instance_id,
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alarmUtil_getSev_str(alarm_query.severity).c_str(),
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pn.c_str());
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/* filter out 'process=pmond'
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* ... that alarm is handled by hbsAgent */
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if ( pn != MTC_SERVICE_PMOND_NAME )
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{
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active_process_alarms_type this_alarm ;
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this_alarm.process = pn ;
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@ -163,10 +185,11 @@ void manage_queried_alarms ( list<active_process_alarms_type> & saved_alarm_lis
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}
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}
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}
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}
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else
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{
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ilog ("fm_get_fault failed (rc:%d)\n", rc );
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wlog ("fm_get_fault failed (rc:%d)\n", rc );
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rc = FAIL_OPERATION ;
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break ;
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}
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}
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else
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@ -174,10 +197,21 @@ void manage_queried_alarms ( list<active_process_alarms_type> & saved_alarm_lis
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dlog2 ("last entry %d\n", i);
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break ;
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}
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} /* for loop */
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}
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else
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{
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wlog("failed to query alarms from fm ; rc:%d", rc);
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rc = FAIL_REQUEST ;
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}
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free(alarm_list_ptr);
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}
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else
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{
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elog ("unable to allocate memory for alarm list");
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rc = FAIL_NULL_POINTER ;
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}
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return (rc);
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}
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/************************* A L A R M I N G **************************/
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@ -37,8 +37,10 @@ typedef struct
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EFmAlarmSeverityT severity ;
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} active_process_alarms_type ;
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/* Clear any pending alarms if the specified hostname is valid */
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void manage_queried_alarms ( list<active_process_alarms_type> & alarm_list, string hostname="" );
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/* Query FM for a list of Process Monitor (200.006) alarms */
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int query_alarms ( list<active_process_alarms_type> & alarm_list, string hostname="" );
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void alarmed_process_audit ( void );
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void pmonAlarm_init ( void );
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@ -41,15 +41,6 @@ static struct mtc_timer ptimer[MAX_PROCESSES] ;
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std::list<string> config_files ;
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std::list<string>::iterator string_iter_ptr ;
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/* If there is an alarm in the list that matches one in the process list
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* then update that process with its severity and failed state.
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* If there is a process in the saved list that is not in the process list
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* then clear its alarm as it is no longer valid.
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*/
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void manage_process_alarms ( list<active_process_alarms_type> & _list,
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process_config_type * const ptr,
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int const processes );
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static process_config_type process_config[MAX_PROCESSES] ;
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/* lookup process control by index and return its pointer if found.
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@ -216,6 +207,7 @@ void pmon_timer_init ( void )
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/* Init the timer for this process */
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mtcTimer_init ( process_config[i].pt_ptr, _pmon_ctrl_ptr->my_hostname, "process" ) ;
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}
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_pmon_ctrl_ptr->last_alarm_query_pass = false ;
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}
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void _process_death_hdlr ( int sig_num, siginfo_t * info_ptr, void * context_ptr );
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@ -371,7 +363,7 @@ void init_process_config_memory ( void )
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* all the process config files from /etc/pmon.d */
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void load_processes ( void )
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{
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list<active_process_alarms_type> saved_alarm_list ;
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list<active_process_alarms_type> queried_alarm_list ;
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int rc = PASS ;
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@ -385,10 +377,6 @@ void load_processes ( void )
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close_process_socket ( &process_config[i] );
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}
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/* Query fm for existing pmon process alarms and
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* for each that is found store their 'name' and
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* 'severity' in the passed in saved list */
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manage_queried_alarms ( saved_alarm_list );
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/* init the process config memory */
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init_process_config_memory ();
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@ -454,13 +442,8 @@ void load_processes ( void )
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}
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_pmon_ctrl_ptr->reload_config = false ;
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/* If there were process alarms that existed over the reload
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* then ensure that those processes are updated with that information. */
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if ( saved_alarm_list.size () )
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{
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ilog ("there are %ld active alarms over reload\n", saved_alarm_list.size());
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manage_process_alarms ( saved_alarm_list, &process_config[0], _pmon_ctrl_ptr->processes );
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}
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/* use the audit to clear pre-existing alarms at process startup */
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alarmed_process_audit ();
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}
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@ -1702,65 +1685,124 @@ void _process_death_hdlr ( int sig_num, siginfo_t * info_ptr, void * context_ptr
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}
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}
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/************************************************************************
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/***************************************************************************
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*
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* Name : manage_process_alarms
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* Name : alarmed_process_audit
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*
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* Description: This interface manages process alarms over a process
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* configuration reload
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* Purpose : Verify the process state matches the queried alarm state
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*
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* Steps:
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* Description: To correct process alarm state mismatches.
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*
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* 1. Loop over each item in the list and mark the process as failed
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* with the specified severity level.
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*
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* 2. If the process is not found then clear its alarm as it is no
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* longer a valid process in the new profile and we don't want a
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* lingering stuck alarm.
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*
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*************************************************************************/
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***************************************************************************/
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void manage_process_alarms ( list<active_process_alarms_type> & _list,
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process_config_type * const ptr,
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int const processes )
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void alarmed_process_audit ( void )
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{
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/* get out if the list is empty ; should not have been called if
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* empty but ... just in case */
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if ( ! _list.empty() )
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/* Don't audit FM in service after the last query was successful.
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* There is a blocking issue that needs to be dealt with */
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if ( _pmon_ctrl_ptr->last_alarm_query_pass == true )
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return ;
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/*
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* Query fm for existing pmon process alarms and
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* for each that is found store their 'name' and
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* 'severity' in the passed in queried_alarm_list.
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*/
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list<active_process_alarms_type> queried_alarm_list ;
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int rc = query_alarms ( queried_alarm_list, get_ctrl_ptr()->my_hostname );
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_pmon_ctrl_ptr->last_alarm_query_pass = (rc == PASS);
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/* just return if query failed */
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if ( _pmon_ctrl_ptr->last_alarm_query_pass == false )
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return ;
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if ( queried_alarm_list.size () )
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{
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list<active_process_alarms_type>::iterator _iter_ptr ;
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alog ("audit found %ld active alarms", queried_alarm_list.size());
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/* loop over the list ... */
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for ( _iter_ptr=_list.begin(); _iter_ptr!=_list.end(); ++_iter_ptr )
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for ( _iter_ptr=queried_alarm_list.begin();
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_iter_ptr!=queried_alarm_list.end();
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++_iter_ptr )
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{
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/* for each item assum it is not found */
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bool found = false ;
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alog ("%s audit", _iter_ptr->process.c_str());
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/* try and find this process in the new process profile */
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for ( int i = 0 ; i < processes ; i++ )
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/* find this process*/
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for ( int i = 0 ; (i < _pmon_ctrl_ptr->processes) && !found ; i++ )
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{
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if ( ! _iter_ptr->process.compare((ptr+i)->process) )
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process_config_type * ptr = &process_config[i];
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if ( ! _iter_ptr->process.compare(ptr->process) )
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{
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/* If the process is found then mark it as failed and update its severity.
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* At this point we then assume that there is an alarm raised for this process. */
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found = true ;
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if ( ptr->failed == false )
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{
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ilog ("%s stale alarm ; clearing",
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_iter_ptr->process.c_str() );
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(ptr+i)->failed = false ;
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wlog ("%s process was failed critical ; clearing existing alarm\n", _iter_ptr->process.c_str() );
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pmonAlarm_clear ( get_ctrl_ptr()->my_hostname, PMON_ALARM_ID__PMOND, _iter_ptr->process );
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pmonAlarm_clear ( get_ctrl_ptr()->my_hostname,
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PMON_ALARM_ID__PMOND,
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_iter_ptr->process );
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}
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else if ( _iter_ptr->severity != ptr->alarm_severity )
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{
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wlog ("%s alarm severity mismatch ; %s -> %s ; correcting",
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ptr->process,
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alarmUtil_getSev_str(_iter_ptr->severity).c_str(),
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alarmUtil_getSev_str(ptr->alarm_severity).c_str());
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if ( ptr->alarm_severity == FM_ALARM_SEVERITY_MINOR )
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{
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pmonAlarm_minor(get_ctrl_ptr()->my_hostname,
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PMON_ALARM_ID__PMOND,
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ptr->process, 0);
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}
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else if (ptr->alarm_severity == FM_ALARM_SEVERITY_MAJOR )
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{
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pmonAlarm_major(get_ctrl_ptr()->my_hostname,
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PMON_ALARM_ID__PMOND,
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ptr->process);
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}
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else if (ptr->alarm_severity == FM_ALARM_SEVERITY_CRITICAL )
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{
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pmonAlarm_critical(get_ctrl_ptr()->my_hostname,
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PMON_ALARM_ID__PMOND,
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ptr->process);
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}
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else
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{
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wlog ("%s unexpected severity '%s' ; clearing alarm",
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ptr->process,
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ptr->severity);
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pmonAlarm_clear ( get_ctrl_ptr()->my_hostname,
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PMON_ALARM_ID__PMOND,
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ptr->process );
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}
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}
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else
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{
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alog ("%s is alarmed '%s' ; audit",
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ptr->process,
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ptr->severity);
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}
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}
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}
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/* if not found then just clear the alarm */
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if ( found == false)
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{
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wlog ("%s process alarm clear ; not in current process profile\n", _iter_ptr->process.c_str() );
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pmonAlarm_clear ( get_ctrl_ptr()->my_hostname, PMON_ALARM_ID__PMOND, _iter_ptr->process );
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wlog ("%s is not a monitored process ; clearing alarm",
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_iter_ptr->process.c_str());
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pmonAlarm_clear ( get_ctrl_ptr()->my_hostname,
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PMON_ALARM_ID__PMOND,
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_iter_ptr->process );
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}
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}
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}
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}
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void pmon_service ( pmon_ctrl_type * ctrl_ptr )
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{
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std::list<int> socks ;
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@ -1931,6 +1973,8 @@ void pmon_service ( pmon_ctrl_type * ctrl_ptr )
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{
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_get_events ();
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mtcTimer_start ( pmonTimer_audit, pmon_timer_handler, audit_period );
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alarmed_process_audit ();
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}
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/* Run the degrade set/clear by audit */
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Loading…
Reference in New Issue
Block a user