diff options
Diffstat (limited to 'requirements/03-architecture.rst')
| -rw-r--r-- | requirements/03-architecture.rst | 61 |
1 files changed, 1 insertions, 60 deletions
diff --git a/requirements/03-architecture.rst b/requirements/03-architecture.rst index 58fa7968..14055485 100644 --- a/requirements/03-architecture.rst +++ b/requirements/03-architecture.rst @@ -284,65 +284,6 @@ It consists of the following steps: 8. The Administrator is coordinating and executing the maintenance operation/work on the NFVI. Note: this step is out of scope of Doctor. -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. Table 1 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: + |