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Overview of YAIM

Overview of YAIM. AEGIS Training for Site Administrators. Dusan Vudragovic SCL, Institute of Physics Belgrade Serbia dusan@scl.rs. The SEE-GRID-SCI initiative is co-funded by the European Commission under the FP7 Research Infrastructures contract no. 211338. What is YAIM.

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Overview of YAIM

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  1. Overview of YAIM AEGIS Training for Site Administrators Dusan Vudragovic SCL, Institute of Physics Belgrade Serbia dusan@scl.rs The SEE-GRID-SCI initiative is co-funded by the European Commission under the FP7 Research Infrastructures contract no. 211338

  2. What is YAIM • YAIM = Yaim Ain't an Installation Manager • YAIM is software to configure Grid services • YAIM provides simple configuration methods • YAIM has been implemented as a set of bash scripts • To support the EGEE project's component based release model YAIM 4 has been modularized • YAIM core is supplemented by component specific scripts, distributed as separate RPMs YAIM’s logo – the yak The yak is a long-haired humped domestic bovine found in Tibet and throughout the Himalayan region of south Central Asia, as well as in Mongolia. The yak is not a gnu.

  3. YAIM’s directory structure (1/2) • YAIM directory structure is created under/opt/glite/yaim • /functions/ - Functions (bash scripts) to configure node types • /functions/local/ - Site administrators can put here their own function definition files • /functions/pre/ - If this function exists, will be executed before the main function • /functions/post/ - If this function exists, will be executed after the main function • /node-info.d/ - Contains a file for each node type which defines the set of functions to be executed during the configuration of that node type

  4. YAIM’s directory structure (2/2) • /defaults/ - Files that will be sourced before and after the main site-info.def; purpose is to give meaningful default values • /bin/ - The main YAIM executable • /log/ - YAIM's logfile • /examples/ - Configuration example

  5. YAIM’s configuration directory structure • YAIM allows having the site's configuration in a well separated and protected place • The site-info.def file has to sit in a directory (ex.: /root/siteinfodir/) which could contain the followings • site-info.def - main configuration file of the site • services/ - files are sourced only when that given service is configured • nodes/ - files are sourced only when that given host is configured • vo.d/ - files can contain VO specific variables • users.conf, groups.conf - configurable via the USERS_CONF and GROUPS_CONF variables

  6. The bin/yaim command(1/2) • Usage/opt/glite/yaim/bin/yaim <action> <parameters> • Actions-c | --configure – configure services-r | --runfunction – execute a configuration function -v | --verify – check variables definition -d | --debug – logging level -e | --explain – explains what the functions are doing -h | --help – help -a | --available –available configuration targets

  7. The bin/yaim command(2/2) • Parameters-s | --siteinfo – location of the site-info.def file-n | --nodetype – node name to configure-f | --function – function to execute • Examples • Configuration./yaim –c –s /root/siteinfo/site-info.def –n SE_dpm_mysql –d 6 • Running a function separately ./yaim –r –s /root/siteinfo/site-info.def –n LFC_mysql –f config_gip • Verify your site-info.def./yaim –v –s /root/siteinfo/site-info.def –n SE_dpm_mysql

  8. Configuration flow (1/2) • When launching the configuration the different configuration files will be sourced and will overwrite each other in the following order • /opt/glite/yaim/defaults/site-info.pre (Y) • /opt/glite/yaim/defaults/myservice.pre (S) • /root/siteinfo/site-info.def (S) • /opt/glite/yaim/defaults/site-info.post (Y) • /opt/glite/yaim/defaults/myservice.post (S) • /root/siteinfo/services/mysevice (S) • /root/siteinfo/nodes/mynode (S) • /root/siteinfo/vo.d/myvo (S) • /opt/glite/yaim/node-info.d/myservice (Y)

  9. Configuration flow (2/2) • For each function myfunc defined in /opt/glite/yaim/node-info.d/myservice yaim executes the followings if they are defined • /opt/glite/yaim/functions/pre/myfunc • /opt/glite/yaim/functions/local/myfuncOR /opt/glite/yaim/functions/myfunc • /opt/glite/yaim/functions/post/myfunc

  10. The log file • YAIM logs its output to/opt/glite/yaim/log/yaim/yaimlog • Each time the yaim command is executed an entry is added to this logfile containing the • command executed • the site-info.def and other config files used • the time and date information • the version of the installed YAIM RPMs

  11. SEE-GRID-SCI YAIM template • SEE-GRID-SCI YAIM siteinfo directory template is available athttps://viewvc.scl.rs/viewvc/yaim/trunk/?root=seegrid

  12. Other useful info • YAIM home pagehttp://www.yaim.info/ • YAIM 4 guide for sysadminshttps://twiki.cern.ch/twiki/bin/view/LCG/YaimGuide400 • YAIM Status Pagehttps://twiki.cern.ch/twiki/bin/view/LCG/YaimPlanning • gLite 3.1 Generic Installation & Configuration guidehttps://twiki.cern.ch/twiki/bin/view/LCG/GenericInstallGuide310

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