PowerVM

  • 1.  Time and Date Management with PowerVM

    Posted Thu September 30, 2021 08:03 AM
    Hi,

    Quick question: 

    Are these Time Reference Partitions still required nowadays:

    Time and Date Management with PowerVM

    or could PowerVM / Service Processor somehow sync the time directly  from HMC?

    Since now when we deploy new VM from our Default image > Time is always totally wrong after 1st boot...and needs to be fixed manually before NTP can be started..

    On HMC we have NTP config so that is OK, but we don't have these TRPs enabled ..
    Or if TRP is needed, can VIOS be TRP partition? (since on VIOSes we have NTP set as well, so time is OK on those..) 

    Br,
    tommi

    ------------------------------
    Tommi Sihvo, Lead Service Architect
    TietoEVRY, Compute Services
    email tommi.sihvo@tieto.com mobile +358 (0)40 5180 Finland
    ------------------------------


  • 2.  RE: Time and Date Management with PowerVM

    Posted Fri October 01, 2021 03:00 AM
    Edited by Andrey Klyachkin Fri October 01, 2021 03:00 AM
    It is not only can, it is even recommended:

    Because the TRP is responsible to maintaining the current time for the FSP and the PowerVM hypervisor, a TRP cannot use partition migration to move to another server. For this reason, you might want to create a partition just for this purpose or use partitions that cannot be migrated to other servers (for example VIOS partitions).

    • Using TRP on a dual VIOS configuration with ntp/ntpdate is sufficient (also keep HMC on NTP if possible) as a best practice.


    ------------------------------
    Andrey Klyachkin

    https://www.power-devops.com
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  • 3.  RE: Time and Date Management with PowerVM

    Posted Fri October 01, 2021 04:55 AM
    Many Thanks Andrey! :)

    ------------------------------
    Tommi Sihvo, Lead Service Architect
    TietoEVRY, Compute Services
    email tommi.sihvo@tieto.com mobile +358 (0)40 5180 Finland
    ------------------------------



  • 4.  RE: Time and Date Management with PowerVM

    Posted Mon October 04, 2021 11:39 AM
    In VIOS, how can we start xntpd with the -x option?
    I followed the step-by-step Configuring NTP in PowerVM VIOS but xntpd starts without it.
    Or is this flag not desirable for a TRP?

    Kind regards,

    ------------------------------
    F. Alejandro Osso
    ------------------------------



  • 5.  RE: Time and Date Management with PowerVM

    Posted Tue October 05, 2021 02:12 AM
    Edited by CHRIS GIBSON Tue October 05, 2021 02:15 AM
    Hi, you can try this.

    $ stopnetsvc xntpd
    $ oem_setup_env
    # chssys -s xntpd -a "-x"
    # lssrc -Ss xntpd
    #subsysname:synonym:cmdargs:path:uid:auditid:standin:standout:standerr:action:multi:contact:svrkey:svrmtype:priority:signorm:sigforce:display:waittime:grpname:
    xntpd::-x:/usr/sbin/xntpd:0:0:/dev/console:/dev/console:/dev/console:-O:-Q:-K:0:0:20:0:0:-d:20:tcpip:
    # vi /home/padmin/config/ntp.conf
    ; Add "slewalways yes" to /home/padmin/config/ntp.conf
    # exit
    $ tail -1 config/ntp.conf
    slewalways yes
    $ startnetsvc xntpd
    $ grep slew config/ntp.log
    5 Oct 00:33:57 xntpd[20840702]: xntpd started with slewalways=yes defined in ntp.conf
    $ ps -ef | grep xntpd
    root 18219158 7143644 0 00:52:52 - 0:00 /usr/sbin/xntpd -x -c /home/padmin/config/ntp.conf

    ------------------------------
    CHRIS GIBSON
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  • 6.  RE: Time and Date Management with PowerVM

    Posted 17 days ago

    Hello Chris,

    Thanks a lot.  It worked perfectly.

    Kind regards,

    F. Alejandro Osso

    On 2021-10-05 03:14, IBM Community wrote:

    Hi, you can try this. $ stopnetsvc xntpd $ oem_setup_env # chssys -s xntpd -a "-x" # lssrc -Ss xntpd #subsysname:synonym:cmdargs:path:uid:auditid...
    IBM Community

    PowerVM

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    Re: Time and Date Management with PowerVM
    Reply to Group Reply to Sender
    CHRIS GIBSON
    Oct 5, 2021 2:12 AM
    CHRIS GIBSON
    Hi, you can try this.

    $ stopnetsvc xntpd
    $ oem_setup_env
    # chssys -s xntpd -a "-x"
    # lssrc -Ss xntpd
    #subsysname:synonym:cmdargs:path:uid:auditid:standin:standout:standerr:action:multi:contact:svrkey:svrmtype:priority:signorm:sigforce:display:waittime:grpname:
    xntpd::-x:/usr/sbin/xntpd:0:0:/dev/console:/dev/console:/dev/console:-O:-Q:-K:0:0:20:0:0:-d:20:tcpip:
    ; Add "slewalways yes" to /home/padmin/config/ntp.conf
    # vi /home/padmin/config/ntp.conf
    ; Add "slewalways yes" to /home/padmin/config/ntp.conf
    # exit
    $ tail -1 config/ntp.conf
    slewalways yes
    $ startnetsvc xntpd
    $ grep slew config/ntp.log
    5 Oct 00:33:57 xntpd[20840702]: xntpd started with slewalways=yes defined in ntp.conf
    $ ps -ef | grep xntpd
    root 18219158 7143644 0 00:52:52 - 0:00 /usr/sbin/xntpd -x -c /home/padmin/config/ntp.conf

    ------------------------------
    CHRIS GIBSON
    ------------------------------
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