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IPv6 Testbed Overview at CERN - EMI IPv6 Meeting Oct. 2012

Overview of EMI IPv6 Testbed at CERN, including building testbed, installing middleware, running jobs, development and future steps. Explore issues, patches, and tools used during the project.

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IPv6 Testbed Overview at CERN - EMI IPv6 Meeting Oct. 2012

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  1. IPv6 Testbed @ CERN Andrew Elwell DusanKlinek Hepix IPv6 meeting Oct 2012

  2. Overview • Openlab Summer Student (DusanKlinek) • Testbed machines • Code debugging • Patches back upstream • Outstanding issues • EMI (cern) roadmap for next year • VM Migration to dual stack EMI IPv6 Testbed HEPIX IPv6 Meeting, Oct 2012

  3. Step 1: Build your testbed • Using CERN Hyper-V + SL5/6 • IPv4 static DHCP (registered in DNS) • Manual addition of IPv6 information to /etc/sysconfig/network-scripts/ifcfg-eth0 • Manual reverse DNS • gtv6-emi[01-20].cern.ch EMI IPv6 Testbed HEPIX IPv6 Meeting, Oct 2012

  4. Step 2: Install Middleware • Site BDII (gtv6-emi03) • VOMS (gtv6-emi06) • Myproxy (gtv6-emi08) • UI (dklinek-ipv6-02) • Nagios (gtv6-emi02)* • L&B (gtv6-emi12) [not tested – no WMS] EMI IPv6 Testbed HEPIX IPv6 Meeting, Oct 2012

  5. ARGUS (gtv6-emi13) • DPM (gtv6-emi04, gtv6-emi14) • LFC (gtv6-emi07) • FTS (gtv6-emi11) • CE (emi-ipv6-ce) • WN (gtv6-emi05) (torque) EMI IPv6 Testbed HEPIX IPv6 Meeting, Oct 2012

  6. Step 3: Run Jobs? • BDII – Yaimconfig bound slapd to ipv4 only • Fixed upstream and released • Storage • SRM uses gSOAP which binds to 0.0.0.0 only • If AAAA present, client fails without retrying v4 • Patching possible, but would fork EMI (2.7.16) ver. • FTS • Oracle issues • Case sensitivity EMI IPv6 Testbed HEPIX IPv6 Meeting, Oct 2012

  7. UI – glite-ce-job-* fail if no AAAA record present for target on a dual stack UI • Bug in ARES – not trapping ARES_ENODATA and failing with resolver internal error • Works with patch to glite-lbjp-common-gss EMI IPv6 Testbed HEPIX IPv6 Meeting, Oct 2012

  8. Development / Tooling • Summary of work done by Dusan EMI IPv6 Testbed HEPIX IPv6 Meeting, Oct 2012

  9. Where Next? • Expand testbed VM count slightly • New EGI rc releases will be installed on these hosts (dual stack) • If issues – check if v6 related • Override DNS, iptables, network tracing etc. • Will mean hassling network people (HINT – LanDB!) • Existing test instances won't be changed • No retrofit of IPv6 EMI IPv6 Testbed HEPIX IPv6 Meeting, Oct 2012

  10. TODO • Check VOMS config • Expand storage pools in DPM • Integrate with simple BDII editor? • Monitor ALL THE THINGS The EMI Project is partially funded by the EU grant RI-261611 EMI IPv6 Testbed HEPIX IPv6 Meeting, Oct 2012

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