Webinar: The Reference Architecture for Red Hat OpenShift Container Platform on IBM Z and IBM LinuxONE is for you

Join us for our webinar on Wednesday, May 12th, 11:00 AM - 12:00 PM EST!

Abstract

With the new Reference Architecture for Red Hat OpenShift on IBM Z and IBM LinuxONE (RHOCP)  we want to make it easier for planning and building of an RHOCP environment. The session will elaborate on the options, capabilities and best practices for RHOCP on IBM Z and IBM LinuxONE based on the z/VM and KVM hypervisors, aligned to the requirements of the use cases you want to implement. The living document for the Reference Architecture is updated with the evolution of new features and capabilities in RHOCP.

Speaker

  • Wilhelm Mild, IBM Executive IT Architect

Registration

Register here. You can check the system requirements here.
After registering, you will receive a confirmation email containing information about joining the webinar.

Replay & Archive

All sessions are recorded. For the archive as well as a replay and handout of this session and all previous webinars see here.

New Release: qclib v2.3

qclib v2.3 is now available for download here. No spectacular new features, just some minor polishing in this release.

For more information, see the README.

New Release: Ubuntu 21.04

Ubuntu 21.04 is out! See the release notes here, and the section on s390x (=IBM Z) specific features here.

Did you know...?

...that besides contributing to the regular updates of Linux distributions, like fixpacks, service packs and point releases, the Linux on Z development team also delivers bugfixes that become available to users through the ongoing, distro-specific update mechanisms as follows:
  • z-Stream in Red Hat Enterprise Linux (RHEL)
  • maintweb updates in SUSE Linux Enterprise Server (SLES)
  • SRU updates in Canonical's Ubuntu
Therefore, we strongly encourage Linux on Z users to keep their systems up to date and apply these updates whenever they become available to avoid issues that are already fixed!

Article: Using Netplan with Linux on IBM Z

A new article detailing how to use Netplan with systemd-networkd as the renderer with Linux on IBM Z can be found here.

Webinar: Red Hat OpenShift for IBM Z and LinuxONE on RHEL 8.3 KVM

Join us for our webinar on Wednesday, April 21, 11:00 AM - 12:00 PM EST!

Abstract

Red Hat OpenShift is available on RHEL 8.3 KVM starting with Red Hat OpenShift version 4.7 on IBM Z and LinuxONE. We discuss the deployment of a Red Hat OpenShift Cluster on RHEL KVM from a high-level perspective, including supported configurations and requirements, especially the available network and storage options.
Furthermore, we explain the installation steps of Red Hat OpenShift 4.7 on RHEL KVM in detail, including best practices and a short excursion on cluster debugging.

Speakers

  • Dr. Wolfgang Voesch, Iteration Manager - OpenShift on IBM Z and LinuxONE
  • Holger Wolf, Product Owner - OpenShift on Linux on IBM Z and LinuxONE

Registration

Register here. You can check the system requirements here.
After registering, you will receive a confirmation email containing information about joining the webinar.

Replay & Archive

All sessions are recorded. For the archive as well as a replay and handout of this session and all previous webinars see here.

New Release: Linux Kernel 5.11

Linux kernel 5.11 (available here) has been released. Here are the highlights from a Linux on Z perspective:

  • Crypto  
    • zcrypt: Applications that use crypto adapters in the early boot phase (e.g. protected key dm-crypt) may occasionally detect that the crypto devices are not (yet?) ready for use which may result in unexpected error situations. So far, the Linux kernel did not indicate when AP bus scanning was complete and all crypto devices online.
      With the new feature, the kernel sends uevents to indicate that the AP bus scan is complete and that the bindings are complete. In addition, two new sysfs attributes are introduced that indicate the completion of the AP bus scan and the progress in device bindings. These mechanisms allow applications (or udev rules) to delay the use of crypto devices until they initialization is complete.
  • Networking
    • SMC-R Link Group Support: Kernel-side support for monitoring link groups. Requires smc-tools v1.4 for userspace-side exploitation.
      In particular, state and protection against failures on a per-link basis are available, so that administrators can identify critical infrastructure and act accordingly.
        $ smcr device show all
        Net-Dev   IB-Dev  IB-P  IB-State  Type          Crit  #Links  PNET-ID
        ens281    mlx4_0  1       ACTIVE  RoCE_EXPRESS  No    1       NET1
        ens281d1  mlx4_0  2     INACTIVE  RoCE
      _EXPRESS  No    1       NET2
      Also provides insights into link groups (further details available with option --detail):
        $ smcr linkgroup link-show all
        LG-ID     LG-Role  LG-Type  Net-Dev   Link-State   #Conns
        00000100  CLNT     SYM      ens281    LINK_ACTIVE  1
        00000100  CLNT     SYM      enP1s282  LINK_ACTIVE  0

  • Storage
    • Fibre Channel Endpoint Security capability: Exposes the Fibre Channel Endpoint Security (FCES) for DASDs via the sysfs filesystem.
        $ cat /sys/bus/ccw/devices/0.0.c600/fc_security
        Encryption

      Further integrated in lsdasd and lszdev commands. See the following output for further details:
        $ chzdev dasd --help-attribute fc_security
        ATTRIBUTE fc_security
        DESCRIPTION
        This read-only attribute shows the Fibre Channel Endpoint Security 
        status of the connection to the
        DASD device:
          Unsupported :   The DASD device does not support Fibre Channel
                          Endpoint Security
          Inconsistent :  The operational channel paths of the DASD device
                          report inconsistent Fibre Channel Endpoint
                          Security status
          Authentication: The connection has been
                          authenticated
          Encryption :    The connection is encrypted

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