osaf/services/saf/amf/README-HEADLESS | 62 +++++++++++++++++++++++++++++++++++ 1 files changed, 62 insertions(+), 0 deletions(-)
diff --git a/osaf/services/saf/amf/README-HEADLESS b/osaf/services/saf/amf/README-HEADLESS new file mode 100644 --- /dev/null +++ b/osaf/services/saf/amf/README-HEADLESS @@ -0,0 +1,62 @@ +# +# -*- OpenSAF -*- +# +# (C) Copyright 2016 The OpenSAF Foundation +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +# or FITNESS FOR A PARTICULAR PURPOSE. This file and program are licensed +# under the GNU Lesser General Public License Version 2.1, February 1999. +# The complete license can be accessed from the following location: +# http://opensource.org/licenses/lgpl-license.php +# See the Copying file included with the OpenSAF distribution for full +# licensing terms. +# +# Author(s): Ericsson AB +# + +GENERAL +------- + +This is a description of how the AMF service handles being headless (SC down) +and recovery (SC up). + +CONFIGURATION +------------- + +AMF reads the "scAbsenceAllowed" attribute to determine if headless mode is +supported. A positive integer indicates the number of seconds AMF will tolerate +being headless. + +Normally, the AMF Node Director restarts a node if there is no active AMF +Director. If headless support is enabled, the Node Director will delay the +restart for the duration specified in "scAbsenceAllowed". If a SC recovers +during the period, the restart is aborted. + +IMPLEMENTATION DETAILS +---------------------- + +While headless, state information such as component and SU restart counts +cannot be synced to the Director. The Node Director will send these values to +the Director once a SC recovers. + +LIMITATIONS +----------- + +Recovery actions are limited while headless. + +Supported: +* component and SU restart + +Limited support: +* component and SU failover. Failover is delayed until SC recovery. +For 2N Service Group, a standby assignment will transition +to active directly if required. For other Service Group types, standby +assignments are first removed, and reassigned as appropriate for the SG. + +Not supported: +* node switchover and failover will result in node restart. + + +SI/CSI dependencies will not be honoured while headless. + ------------------------------------------------------------------------------ _______________________________________________ Opensaf-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/opensaf-devel
