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diff --git a/requirements/07-annex.rst b/requirements/07-annex.rst new file mode 100644 index 00000000..dbe41bd1 --- /dev/null +++ b/requirements/07-annex.rst @@ -0,0 +1,64 @@ +Annex: NFVI Faults +================================================= + +Faults in the listed elements need to be immediately notified to the Consumer in +order to perform an immediate action like live migration or switch to a hot +standby entity. In addition, the Administrator of the host should trigger a +maintenance action to, e.g., reboot the server or replace a defective hardware +element. + +Faults can be of different severity, i.e., critical, warning, or +info. Critical faults require immediate action as a severe degradation of the +system has happened or is expected. Warnings indicate that the system +performance is going down: related actions include closer (e.g. more frequent) +monitoring of that part of the system or preparation for a cold migration to a +backup VM. Info messages do not require any action. We also consider a type +"maintenance", which is no real fault, but may trigger maintenance actions +like a re-boot of the server or replacement of a faulty, but redundant HW. + +Faults can be gathered by, e.g., enabling SNMP and installing some open source +tools to catch and poll SNMP. When using for example Zabbix one can also put an +agent running on the hosts to catch any other fault. In any case of failure, the +Administrator should be notified. The following table provides a list of high +level faults that are considered within the scope of the Doctor project +requiring immediate action by the Consumer. + + + ++------------------+---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| Service | Fault | Severity | How to detect? | Comment | Action to recover | ++------------------+---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| Compute Hardware | Processor/CPU failure, CPU condition not ok | Critical | Zabbix | | Switch to hot standby | ++ +---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| | Memory failure/Memory condition not ok | Critical | Zabbix (IPMI) | | Switch to hot standby | ++ +---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| | Network card failure, e.g. network adapter connectivity lost | Critical | Zabbix/Ceilometer | | Switch to hot standby | ++ +---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| | Disk crash | Info | RAID monitoring | Network storage is very redundant (e.g. RAID system) and can guarantee high availability | Inform OAM | ++ +---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| | Storage controller | Critical | Zabbix (IPMI) | | Live migration if storage is still accessible; otherwise hot standby | ++ +---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| | PDU/power failure, power off, server reset | Critical | Zabbix/Ceilometer | | Switch to hot standby | ++ +---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| | Power degradation, power redundancy lost, power threshold exceeded | Warning | SNMP | | Live migration | ++ +---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| | Chassis problem (.e.g fan degraded/failed, chassis power degraded), CPU fan problem, temperature/thermal condition not ok | Warning | SNMP | | Live migration | ++ +---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| | Mainboard failure | Critical | Zabbix (IPMI) | | Switch to hot standby | ++ +---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| | OS crash (e.g. kernel panic) | Critical | Zabbix | | Switch to hot standby | ++------------------+---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| Hypervisor | System has restarted | Critical | Zabbix | | Switch to hot standby | ++ +---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| | Hypervisor failure | Warning/Critical | Zabbix/Ceilometer | | Evacuation/switch to hot standby | ++ +---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| | Zabbix/Ceilometer is unreachable | Warning | ? | | Live migration | ++------------------+---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| Network | SDN/OpenFlow switch, controller degraded/failed | Critical | ? | | Switch to hot standby or reconfigure virtual network topology | ++ +---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ +| | Hardware failure of physical switch/router | Warning | SNMP | Redundancy of physical infrastructure is reduced or no longer available | Live migration if possible, otherwise evacuation | ++------------------+---------------------------------------------------------------------------------------------------------------------------+------------------+-------------------+------------------------------------------------------------------------------------------+----------------------------------------------------------------------+ + +.. + vim: set tabstop=4 expandtab textwidth=80: + |