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SAP	
  LVM	
  Custom	
  Opera3ons	
  
•  This  is  the  second  in  a  series  of  presenta0ons  dedicated  to  SAP  
Landscape  Virtualiza0on  Management  (LVM...
Overview	
  
•  SAP  LVM  manages  SAP  instances  and  databases  as  standard  
using  the  SAP  Host  Agent
•  Out-­‐of...
Provider	
  Implementa3on	
  
•  The  Provider  Implementa0on  defines  the  link  between  LVM  and  
the  host  agent  an...
Provider	
  Implementa3on	
  
Custom	
  Opera3on	
  Defini3ons	
  
•  The  custom  opera0on  “Freeze”  is  used  to  freeze  the  Red  Hat  cluster  
so ...
Custom	
  Opera3on	
  Defini3ons	
  
•  The  important  fields  to  note  here  are  the  “Name”  and  “Bu^on  
Group”  –  F...
Custom	
  Hook	
  Defini3ons	
  
•  The  custom  hook  is  needed  to  intercept  SAP  system  stop  and  start  requests  ...
Host	
  Agent	
  Registered	
  Script	
  
•  For  each  Provider  Implementa0on  a  standard  host  agent  configura0on  fil...
Example	
  Script	
  –	
  ClusterAdm.ksh	
  
Sample	
  Coding	
  (perform	
  any	
  site	
  specific	
  checks	
  beforehan...
Example	
  Script	
  –	
  ClusterAdm.ksh	
  
Sample	
  Coding	
  (con;nued)	
  
FREEZE) echo "[RESULT]: Cluster operation ...
Example	
  Script	
  –	
  ClusterAdm.ksh	
  
Sample	
  Coding	
  (con;nued)	
  
#
# Perform operation
#
echo "[RESULT]: Co...
Reference	
  Material	
  
•  The  following  pages  on  SAP  Help  are  useful:
–  Configuring  Custom  Opera0ons
–  Configu...
Thank-­‐you	
  
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SAP LVM Customer Operations

Configure SAP NetWeaver Landscape Virtualisation Management to incorporate custom operations for both SAP and non-SAP instances.

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SAP LVM Customer Operations

  1. 1. SAP  LVM  Custom  Opera3ons  
  2. 2. •  This  is  the  second  in  a  series  of  presenta0ons  dedicated  to  SAP   Landscape  Virtualiza0on  Management  (LVM) •  This  document  provides  a  quick  overview  of  how  you  can   customize  LVM  with  custom  opera0ons  and  hooks  and  is  aimed   at  system  administrators  responsible  for  configuring  and   opera0ng  SAP  LVM •  This  document  describes  how  this  can  be  achieved  in  a  UNIX   environment  but  can  be  easily  adapted  for  the  Windows   plaKorm •  In  this  presenta0on,  we  will  show  you  how  to  create  custom   opera0ons  and  hooks  for  managing  a  Red  Hat®  cluster   containing  the  SAP  Central  Services  (SCS) Introduc3on  
  3. 3. Overview   •  SAP  LVM  manages  SAP  instances  and  databases  as  standard   using  the  SAP  Host  Agent •  Out-­‐of-­‐the  box  opera0ons  include  “stop”,  “start”,  “mass  stop”,   “mass  start” •  SAP  LVM  can  be  extended  to  include  custom  opera0ons  that   can  be  associated  with  instances  and  hosts •  Custom  opera0ons  are  defined  in  LVM  via  a  Provider   Implementa0on  and  Custom  Opera0on  and  Hooks  defini0on •  Custom  opera0ons  are  registered  with  the  SAP  Host  Agent   using  a  configura0on  file
  4. 4. Provider  Implementa3on   •  The  Provider  Implementa0on  defines  the  link  between  LVM  and   the  host  agent  and  describes  how  the  custom  opera0ons  are   implemented •  In  this  example,  the  provider  implementa0on   “LVM_CustomOpera0on_ClusterAdm”  will  be  defined •  The  Provider  Implementa0on  must  include  the  custom   parameter  OPERATION  which  LVM  will  supply  to  the  host  agent   when  triggered •  The  host  agent  configura0on  file  defini0on  for  the  provider   implementa0on  will  call  the  Korn  script  with  the  $[PARAM-­‐ OPERATION]  parameter
  5. 5. Provider  Implementa3on  
  6. 6. Custom  Opera3on  Defini3ons   •  The  custom  opera0on  “Freeze”  is  used  to  freeze  the  Red  Hat  cluster   so  other  opera0ons  can  take  place  without  a  cluster  failover  
  7. 7. Custom  Opera3on  Defini3ons   •  The  important  fields  to  note  here  are  the  “Name”  and  “Bu^on   Group”  –  Freeze  and  Cluster  Opera0on  respec0vely •  The  custom  parameter  “Opera0on”  has  been  set  to  FREEZE   which  will  be  passed  to  the  host  agent  and  Korn  script  via  the   configura0on  file •  The  “Name”  and  “Bu^on  Group”  appear  on  the  host  opera0on   screen  in  LVM •  Clicking  the  Cluster  Opera0on  bu^on  triggers  the  custom   opera0on  and  the  associated  Korn  script •  Similar  custom  opera0ons  are  created  for  “Unfreeze”  and   “Relocate”
  8. 8. Custom  Hook  Defini3ons   •  The  custom  hook  is  needed  to  intercept  SAP  system  stop  and  start  requests   to  prepare  the  cluster  (freeze/unfreeze)  so  that  cluster  monitoring  does  not   incorrectly  start  or  stop  the  instance  whilst  valid  stop/start  opera0ons  are   being  performed
  9. 9. Host  Agent  Registered  Script   •  For  each  Provider  Implementa0on  a  standard  host  agent  configura0on  file   with  extension  “.conf”  must  be  created  in  the  “opera0ons.d”  sub-­‐directory   of  /usr/sap/hostctrl/exe •  For  the  cluster  management  custom  opera0ons  the  sample  configura0on   file  “ClusterAdm.conf”  would  look  as  below •  The  “Name”  must  match  the  name  of  the  Registered  Script  on  the  Provider   Implementa0on  in  LVM •  The  $[PARAM-­‐OPERATION]  can  be  seen  being  passed  as  the  first  parameter   to  the  Korn  script,  indica0ng  the  custom  opera0on  being  requested  by  LVM File   Content   ClusterAdm.conf Name: LVM_CustomOperation_ClusterAdm Command: /sap/Scripts/ClusterAdm.ksh $[PARAM-OPERATION] $[SAPSYSTEMNAME] Workdir: $[DIR_HOME:#sapparam] Username: root ResultConverter: flat
  10. 10. Example  Script  –  ClusterAdm.ksh   Sample  Coding  (perform  any  site  specific  checks  beforehand)   # # Variables from LVM via Hostagent Configuration File # OPERATION=$1 SAPSYSTEMNAME=$2 SERVICE=<your cluster service> # # Determine requested operation # case $OPERATION in STOP) echo "[RESULT]: ${OPERATION} requested for a clustered service” if [[ ${STATUS} != "FROZEN" ]]; then echo "[RESULT]: Service group is not currently frozen; FREEZE operation will be enforced” fi OPERAND="-Z";; START) echo "[RESULT]: ${OPERATION} requested for a clustered service” if [[ ${STATUS} != "FROZEN" ]]; then echo "[RESULT]: Service group is not frozen; nothing to do” exit 0 fi OPERAND="-U";;
  11. 11. Example  Script  –  ClusterAdm.ksh   Sample  Coding  (con;nued)   FREEZE) echo "[RESULT]: Cluster operation ${OPERATION} requested” if [[ ${STATUS} == "FROZEN" ]]; then echo "[RESULT]: Service group is already frozen; nothing to do” exit 0 fi OPERAND="-Z";; UNFREEZE) echo "[RESULT]: Cluster operation ${OPERATION} requested” if [[ ${STATUS} != "FROZEN" ]]; then echo "[RESULT]: Service group ${SERVICE} is not frozen; nothing to do” exit 0 fi OPERAND="-U";; RELOCATE) echo "[RESULT]: Cluster operation ${OPERATION} requested” if [[ ${STATUS} == "FROZEN" ]]; then echo "[ERROR]: Service group ${SERVICE} is frozen; ${OPERATION} operation not possible” exit 8 fi OPERAND="-r";; *) echo "[ERROR]: Invalid cluster operation - ${OPERATION}” exit 8;; esac
  12. 12. Example  Script  –  ClusterAdm.ksh   Sample  Coding  (con;nued)   # # Perform operation # echo "[RESULT]: Command issued to OS: ${clus_path}/clusvcadm ${OPERAND} ${SERVICE}” /usr/sbin/clusvcadm ${OPERAND} ${SERVICE} exit 0
  13. 13. Reference  Material   •  The  following  pages  on  SAP  Help  are  useful: –  Configuring  Custom  Opera0ons –  Configuring  Custom  Hooks •  The  following  SAP  notes  provide  some  informa0on: –  1465491  -­‐  Provider  Implementa0on  Defini0on •  Further  details  are  available  on  request   –  mailto:info@aliterconsul0ng.co.uk
  14. 14. Thank-­‐you  

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