Want to subscribe to topics you're interested in?
Become a Member

Sysadmin Question about KernelCare

Discussion in 'System Administration' started by denellum, Jan 24, 2017.

Tags:
  1. denellum

    denellum Member Premium Member

    79
    19
    8
    May 11, 2016
    Dallas
    Ratings:
    +24
    Local Time:
    8:08 AM
    1.11.10
    10.1.21
    Does anyone here use it? Does it take too many resources to use? Just trying to get a little more info on it, as their site is quick to say "just try it."

    Tanks all :)

    v/r den
     
  2. eva2000

    eva2000 Administrator Staff Member

    28,972
    6,575
    113
    May 24, 2014
    Brisbane, Australia
    Ratings:
    +9,759
    Local Time:
    11:08 PM
    Nginx 1.13.x
    MariaDB 5.5
    • Like Like x 1
  3. denellum

    denellum Member Premium Member

    79
    19
    8
    May 11, 2016
    Dallas
    Ratings:
    +24
    Local Time:
    8:08 AM
    1.11.10
    10.1.21
    do you get any kind of kick back (referral bonus ) && do you use it?

    Really digging the idea of it.
     
  4. eva2000

    eva2000 Administrator Staff Member

    28,972
    6,575
    113
    May 24, 2014
    Brisbane, Australia
    Ratings:
    +9,759
    Local Time:
    11:08 PM
    Nginx 1.13.x
    MariaDB 5.5
    • Like Like x 1
  5. denellum

    denellum Member Premium Member

    79
    19
    8
    May 11, 2016
    Dallas
    Ratings:
    +24
    Local Time:
    8:08 AM
    1.11.10
    10.1.21
    nvm.
     
    Last edited: Jan 26, 2017
  6. pamamolf

    pamamolf Well-Known Member

    2,498
    229
    63
    May 31, 2014
    Ratings:
    +390
    Local Time:
    4:08 PM
    Nginx-1.13.x
    MariaDB 10.1.x
    I am wondering how kernel care interact with new kernel updates coming from yup update....

    I mean does let it install but keep it there until reboot or avoid it to get installed as it is patching live kernel?

    Is there any Paypal automated payment option for renews?

    Is there an option to select a license using a key as it seems better to use?

    Thank you
     
  7. bassie

    bassie Active Member

    494
    104
    43
    Apr 29, 2016
    Ratings:
    +312
    Local Time:
    3:08 PM
    You can install the latest up-to-date kernel.
    Nothing is blocked by default.

    Kernelcare will only patch the running kernel code in the memory, that is booted.
    Rebooting and it will do the same (if needed) with the newly up-to-date booted kernel.

    Kernelcare is like kpatch and allows entire functions in a running kernel to be replaced with their patched versions, doing that safely by stopping all running processes while the live patching is performed. Kernelcare is based on kpatch actually.

    And if you ask me in fairness, I'm not a fan of Kernelcare or any live patch solution.
    The upstream kernels are tested to the max for enterprise purposes but live patches not.
    You could experience strange problems making a reboot still required.
    Also there could be a problem here or there. The Kernel is only a tiny part of the whole eco system.

    You always will have maintenance's based on hard and software, so your system still needs to be powered off or rebooted. An live patching solution isn't need when your infrastructure is redundant. If your system is mission critical and therefore you are considering Kernelcare, it is most likely redundant. So again no need to use Kernelcare.
     
    Last edited: Mar 24, 2017
    • Informative Informative x 2
    • Like Like x 1
  8. eva2000

    eva2000 Administrator Staff Member

    28,972
    6,575
    113
    May 24, 2014
    Brisbane, Australia
    Ratings:
    +9,759
    Local Time:
    11:08 PM
    Nginx 1.13.x
    MariaDB 5.5
    thanks @bassie pretty much answered it.