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Remote Software Deployment - PowerPoint PPT Presentation


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Remote Software Deployment. Nick West. Overview. RSD is a framework for remote software installation. For Library Developers It standardises the writing of 2 scripts:- To assemble a tar (usually source) of the library on the local machine.

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overview
Overview
  • RSD is a framework for remote software installation.
  • For Library Developers
    • It standardises the writing of 2 scripts:-
      • To assemble a tar (usually source) of the library on the local machine.
      • To install/validate the library given its tar file on a remote machine.
  • For End Users:-
    • It allows complete applications (software stacks) to be installed on un-primed remote machines with a single command.
some definitions
Some Definitions
  • A Library
    • The basic building block.
    • Libraries are specified with the syntax:
      • name:version e.g. mysql:5.0.22
    • An RSD library may consist of multiple linux libraries. For example root is considered to be a single RSD library.
  • An Application
    • Is a library stack i.e. a sequence of specified libraries built in order. For example the application minossoft:S07-09-20-R1-26-build_1contains:-
      • dcap:v2_39_sl3.0.3_Linux+2.4libsigc++:1.2.5
      • mysql:5.0.22
      • root:v5-16-00
      • minossoft:S07-09-20-R1-26
how rsd works
How RSD Works
  • Assemble: The Library Developer
    • Creates scripts to assemble and install libraries. RSD uploads them onto the web.
  • Launch/Install: The End User
    • Defines applications built from the libraries and launches a job to a remote machine.
    • On the remote machine a bootstrap script first downloads RSD, then the required libraries and installs the application and returns build results.
rsd the developer perspective
RSD: The Developer Perspective
  • RSD doesn’t solve the problem of library installation
    • but it provides a framework for script writing so it only has to be done once!
  • For tar file assembly script
    • It provides a workspace.
    • It uploads the tar file.
  • For the library installation script
    • It provides access to all supporting libraries i.e. those below the library on the software stack.
    • It provides simple tools to log the operation of the script.
    • It provides a standard place for scripts to be used be end user to setup the library.
rsd the end user perspective
RSD: The End User Perspective…
  • Simple installation operation
    • For example the command:-rsd launchlcg:lcgce01.gridpp.rl.ac.uk:2119/jobmanager-lcgpbs-minosL \

minossoft:S07-09-20-R1-26-build_1-SL4submits an LCG GRID job using Ganga to build the specified application on the RAL T1 CE using queue lcgpbs-minosL

  • Simple removal operation
    • Using the “remove” command e.g.rds launchlcg:lcgce01.gridpp.rl.ac.uk:2119/jobmanager-lcgpbs-minosL \

--remove minossoft:S07-09-20-R1-26-build_1-SL4

  • Transparent library sharing
    • Libraries are built in the context of the supporting libraries.
    • Before installing a new library RSD checks to see if one with the right version and context already exists and reuses it if found.
    • Libraries are automatically removed once all applications that share them have been removed.
rsd the end user perspective1
RSD: …The End User Perspective
  • Basic platform support
    • RSD identifies the platform (currently just SL3/4) and makes that part of the library context and application build name.
    • So the same file system can be shared between different platforms without the risk that RSD will mix libraries across platforms.
  • Validated installation
    • Using the validation step of each library install script.
  • Simple build optimisation
    • Before running a full install of a library that has been built before RSD first attempts to validate.
    • So if installation fails late in the software stack the next RSD install job will simply validate supporting libraries and will skip their re-installation.
  • Limited remote job submission
    • Currently either
      • To the local machine.
      • Via Ganga to either PBS or LCG grid.
  • Software tag publishing
    • When installing/removing on an LCG GRID machine RSD will use the tool lcg-ManageVOTag to either publish or withdraw software tags. (Software tags allow users to target production jobs to batch farms with the required software).