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CDB Configuration for the SLC4 FTS services

This descirbes the CDB configuration for two of the following services, FTS-T0-EXPORT-21 and FTS-T0-EXPORT-21, the ones currently running on SLC4.

The older SLC3-based service are described in FtsTier0CDBConfiguration20.

DNS alias SLS name OS Lemon Version (20th May 2010)
fts-t2-service.cern.ch FTS-T2-SERVICE SLC4 64-bit lemon subcluster FTS 2.2.3
fts-patch4084.cern.ch FTS-PILOT-SERVICE SLC4 64-bit lemon subcluster FTS 2.2.4
fts22-t0-export.cern.ch FTS22-T0-EXPORT SLC4 64-bit lemon subcluster FTS 2.2.3

Template forrmat

The FTS components are defined in the new FIO hireachical template structure. The node template defines what a given node does:

include {"services/gridfts/service/t0export"};
include {"services/gridfts/role/webservice"}; 

include {"services/gridfts/service/t0export"};
include {"services/gridfts/role/agent"};

include {"services/gridfts/service/t2service"};
include {"services/gridfts/role/webservice"}; 

include {"services/gridfts/service/t2service"};
include {"services/gridfts/role/agent"}; 

include {"services/gridfts/service/monitor"};
include {"services/gridfts/role/monitor"}; 

The core template, common to all node types, is prod/services/gridfts.tpl.

Service name

This 'service' is translated immediately to cluster sub-name - in the following disucssion, the two should be used to mean the same thing.

It controls which FTS service the node serves. For the SLC4-based services, there are two:

Service Cluster subname
FTS-T0-EXPORT-21 t0export
FTS-T2-SERVICE-21 t2service

and the monitor service (which monitors all FTS services):

Service Cluster subname
FTS-MONITOR monitor

See FtsTier0Deployment for the current up-to-date status of which nodes are deployed for which services.

For a description of these services themselves, see ScGridFTS.

Role

This describes what the node actually does within the cluster (i.e. whether it is an FTA agent node or a FTS webservice node). It is immediately set to the CDB 'function' attribute.

Node type Role/Function
FTS webservice webservice
FTA channel or VO agents agent
FTM monitoring monitor

See FTSServiceClass for a description of what each component is for.

Software configuration

All components of the FTS are configured using YAIM underneath the ncm-yaim component and CDB configuration. YAIM uses the ncm configuration trees:

/software/components/yaim/

/software/components/yaim/FTA/

/software/components/yaim/FTS/

to control the FTS configuration. The CDB services/gridfts/service/ templates describe the configuration for each separate service. e.g.:

prod/services/gridfts/service/t0export

prod/services/gridfts/service/t2service

prod/services/gridfts/service/monitor

Once the CDB template is updated then on the nodes in question the profiles should be updated and the ncm component should be run. A typical cycle follows.

  1. fts201 # ccm-fetch
  2. fts201 # ncm-ncd --co yaim
  3. If the ncm generated yaim config file /etc/lcg-quattor-site-info.def has not be modified then yaim will not run. Delete the file to force YAIM to run.

Note that a yaim configuration will restart tomcat on the FTS web-services but will not restart the FTA agents, the FTA agents must be restarted by themselves service transfer-agents restart

Detail: web-service

The web-service requires almost no configuration, except the database password, which is delivered by the fts_oracle_passwd SINDES component. This file dropped in by SINDES (/etc/fts-passwords/fts-db-password) is automatically picked up by ncm-yaim component.

  • The DBURL (FTS_DBURL) is set to give the correct JDBC database connect string.

  • The HOST_ALIAS (FTS_HOSTALIAS) is set for BDII to publish the correct DN alias instead of the local hostname.

See FtsServerInstall20 and FtsYaimValues20 for more details.

Detail: agents

In short, the configuration specifies which agent daemons reside on whch nodes in the cluster, and what the various properties of the FTS agent daemons are. The database password is the same as for the web-service for a given FTS service.

See FtsServerInstall20 and FtsYaimValues20 for more details.

SINDES

SINDES is used to add:

  • the standard host certificates
  • the standard load-balancing snmpd password
  • the standard password file information
  • the ssh key (not standard)
  • fts_oracle_passwd which is a cluster-level component that delivers the database passwords to the nodes, using the sub-cluster name to select the correct password

Procedures

Service manager procedures are availble at FtsServiceProcedures.

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Topic revision: r1 - 2008-09-15 - GavinMcCance
 
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