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SAP	
  Host	
  Agent	
  Auto	
  Update	
  
•  This  document  provides  a  quick  overview  of  the  automa6c  update  
func6onality  available  with  SAP  Host  Agent
•  The  SAP  Host  Agent  is  installed  on  every  system  hos6ng  an  SAP  
instance
•  Upgrading  the  host  agent  on  your  en6re  SAP  estate  can  be  a  very  
6me  consuming  task
•  An  fully  automated  update  of  the  host  agent  can  be  achieved  with  
minimum  setup  effort
•  This  document  describes  how  this  can  be  achieved  in  a  UNIX  
environment  but  can  be  easily  adapted  for  the  Windows  plaForm
•  The  document  is  aimed  at  system  administrators  familiar  with  the  
system  copy  process  for  ABAP-­‐based  systems  such  as  ECC
Introduc4on	
  
Pre-­‐Requisites	
  
•  SoKware  Repository  for  Host  Agent
–  a  shared  soKware  repository  file  system  located  on  a  NAS  or  SAN  that  
can  be  mounted  on  all  your  SAP  hosts
–  the  host  agent  will  be  downloaded  into  this  loca6on  as  and  when  a  new  
version  is  made  available  on  the  SAP  Support  Portal
–  for  the  purposes  of  this  document,  let’s  assume  the  shared  soKware  
loca6on  is  named  /sap/soKware  and  the  host  agent  is  stored  in  sub-­‐
directory  HOSTAGENT  i.e.  /sap/soKware/HOSTAGENT
Prepara4on	
  
•  Prepara6on  on  each  SAP  host  
–  adapt  parameter  DIR_NEW  which  informs  the  host  agent  where  to  find  
the  new  updated  host  agent
•  DIR_NEW  =  /usr/sap/hostctrl/new
–  adapt  parameter  hostexec/autoupgrade_delay  to  indicate  the  length  of  
6me  in  minutes  between  each  check  for  a  newer  version
•  hostexec/autoupgrade_delay  =  10
–  establish  link  to  soKware  repository
•  ln  -­‐s  /sap/soKware/HOSTAGENT    /usr/sap/hostctrl/new
Ac4va4on	
  
•  Ac6vate  the  auto  update
–  downloaded  the  latest  host  agent  patch  level  to  the  soKware  repository  
loca6on  /sap/soKware/HOSTAGENT
–  restart  the  host  agent  on  all  hosts  in  your  SAP  estate  –  this  could  be  
scripted
–  aKer  10  minutes,  check  files  dev_saphostexec  and  upgrade.log  in  the  
work  directory  of  the  host  agent  /usr/sap/hostctrl/work
•  See  our  blog  for  more  details:
–  www.aliterconsul6ng.co.uk/blog
Thank-­‐you	
  

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SAP Host Agent Auto Update

  • 1. SAP  Host  Agent  Auto  Update  
  • 2. •  This  document  provides  a  quick  overview  of  the  automa6c  update   func6onality  available  with  SAP  Host  Agent •  The  SAP  Host  Agent  is  installed  on  every  system  hos6ng  an  SAP   instance •  Upgrading  the  host  agent  on  your  en6re  SAP  estate  can  be  a  very   6me  consuming  task •  An  fully  automated  update  of  the  host  agent  can  be  achieved  with   minimum  setup  effort •  This  document  describes  how  this  can  be  achieved  in  a  UNIX   environment  but  can  be  easily  adapted  for  the  Windows  plaForm •  The  document  is  aimed  at  system  administrators  familiar  with  the   system  copy  process  for  ABAP-­‐based  systems  such  as  ECC Introduc4on  
  • 3. Pre-­‐Requisites   •  SoKware  Repository  for  Host  Agent –  a  shared  soKware  repository  file  system  located  on  a  NAS  or  SAN  that   can  be  mounted  on  all  your  SAP  hosts –  the  host  agent  will  be  downloaded  into  this  loca6on  as  and  when  a  new   version  is  made  available  on  the  SAP  Support  Portal –  for  the  purposes  of  this  document,  let’s  assume  the  shared  soKware   loca6on  is  named  /sap/soKware  and  the  host  agent  is  stored  in  sub-­‐ directory  HOSTAGENT  i.e.  /sap/soKware/HOSTAGENT
  • 4. Prepara4on   •  Prepara6on  on  each  SAP  host   –  adapt  parameter  DIR_NEW  which  informs  the  host  agent  where  to  find   the  new  updated  host  agent •  DIR_NEW  =  /usr/sap/hostctrl/new –  adapt  parameter  hostexec/autoupgrade_delay  to  indicate  the  length  of   6me  in  minutes  between  each  check  for  a  newer  version •  hostexec/autoupgrade_delay  =  10 –  establish  link  to  soKware  repository •  ln  -­‐s  /sap/soKware/HOSTAGENT    /usr/sap/hostctrl/new
  • 5. Ac4va4on   •  Ac6vate  the  auto  update –  downloaded  the  latest  host  agent  patch  level  to  the  soKware  repository   loca6on  /sap/soKware/HOSTAGENT –  restart  the  host  agent  on  all  hosts  in  your  SAP  estate  –  this  could  be   scripted –  aKer  10  minutes,  check  files  dev_saphostexec  and  upgrade.log  in  the   work  directory  of  the  host  agent  /usr/sap/hostctrl/work •  See  our  blog  for  more  details: –  www.aliterconsul6ng.co.uk/blog