User Resource management: cgroups + systemd + ssh

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I am trying to limit the memory of a single user that keeps crashing our OpenSuse Server.



What I have done is as desribed here, to modify the limit of the user's slice via



systemctl set-property user-$UID.slice MemoryHigh=20G


where $UID is the user id... e.g. 1000 for the first user created on the system. Now querying the status of the slice, I get:



● user-$UID.slice
Loaded: loaded
Drop-In: /etc/systemd/system.control/user-1008.slice.d
└─50-MemoryHigh.conf, 50-MemoryLimit.conf
Active: inactive (dead)


The status does also not change if the user is loggedin via ssh and runs some process. I am wondering if the limits are enforced?



So I have several questions:



  1. How do I check if the limits are enforced?

  2. I have turned off PAM Authentication in the the sshd file. Has that something to do with it? What do I have to keep in mind when setting PAMAuthentication to yes? Will I be locked out of ssh? I am a little hesitant, since locking myself out means driving to the server location... :D

  3. Has somebody had the same issue and might share his or her solution?

  4. Is there a way to set memory limits for a bunch of users that are within a certain user group? So instead of crafting a rule for each new user that blows up the system, can I simply create a user group for the slobs and then simply add the difficult users to this group?

Any advice is welcome :D










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    0















    I am trying to limit the memory of a single user that keeps crashing our OpenSuse Server.



    What I have done is as desribed here, to modify the limit of the user's slice via



    systemctl set-property user-$UID.slice MemoryHigh=20G


    where $UID is the user id... e.g. 1000 for the first user created on the system. Now querying the status of the slice, I get:



    ● user-$UID.slice
    Loaded: loaded
    Drop-In: /etc/systemd/system.control/user-1008.slice.d
    └─50-MemoryHigh.conf, 50-MemoryLimit.conf
    Active: inactive (dead)


    The status does also not change if the user is loggedin via ssh and runs some process. I am wondering if the limits are enforced?



    So I have several questions:



    1. How do I check if the limits are enforced?

    2. I have turned off PAM Authentication in the the sshd file. Has that something to do with it? What do I have to keep in mind when setting PAMAuthentication to yes? Will I be locked out of ssh? I am a little hesitant, since locking myself out means driving to the server location... :D

    3. Has somebody had the same issue and might share his or her solution?

    4. Is there a way to set memory limits for a bunch of users that are within a certain user group? So instead of crafting a rule for each new user that blows up the system, can I simply create a user group for the slobs and then simply add the difficult users to this group?

    Any advice is welcome :D










    share|improve this question


























      0












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      0








      I am trying to limit the memory of a single user that keeps crashing our OpenSuse Server.



      What I have done is as desribed here, to modify the limit of the user's slice via



      systemctl set-property user-$UID.slice MemoryHigh=20G


      where $UID is the user id... e.g. 1000 for the first user created on the system. Now querying the status of the slice, I get:



      ● user-$UID.slice
      Loaded: loaded
      Drop-In: /etc/systemd/system.control/user-1008.slice.d
      └─50-MemoryHigh.conf, 50-MemoryLimit.conf
      Active: inactive (dead)


      The status does also not change if the user is loggedin via ssh and runs some process. I am wondering if the limits are enforced?



      So I have several questions:



      1. How do I check if the limits are enforced?

      2. I have turned off PAM Authentication in the the sshd file. Has that something to do with it? What do I have to keep in mind when setting PAMAuthentication to yes? Will I be locked out of ssh? I am a little hesitant, since locking myself out means driving to the server location... :D

      3. Has somebody had the same issue and might share his or her solution?

      4. Is there a way to set memory limits for a bunch of users that are within a certain user group? So instead of crafting a rule for each new user that blows up the system, can I simply create a user group for the slobs and then simply add the difficult users to this group?

      Any advice is welcome :D










      share|improve this question
















      I am trying to limit the memory of a single user that keeps crashing our OpenSuse Server.



      What I have done is as desribed here, to modify the limit of the user's slice via



      systemctl set-property user-$UID.slice MemoryHigh=20G


      where $UID is the user id... e.g. 1000 for the first user created on the system. Now querying the status of the slice, I get:



      ● user-$UID.slice
      Loaded: loaded
      Drop-In: /etc/systemd/system.control/user-1008.slice.d
      └─50-MemoryHigh.conf, 50-MemoryLimit.conf
      Active: inactive (dead)


      The status does also not change if the user is loggedin via ssh and runs some process. I am wondering if the limits are enforced?



      So I have several questions:



      1. How do I check if the limits are enforced?

      2. I have turned off PAM Authentication in the the sshd file. Has that something to do with it? What do I have to keep in mind when setting PAMAuthentication to yes? Will I be locked out of ssh? I am a little hesitant, since locking myself out means driving to the server location... :D

      3. Has somebody had the same issue and might share his or her solution?

      4. Is there a way to set memory limits for a bunch of users that are within a certain user group? So instead of crafting a rule for each new user that blows up the system, can I simply create a user group for the slobs and then simply add the difficult users to this group?

      Any advice is welcome :D







      ssh systemd cgroups systemctl






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      edited Jan 15 at 10:23







      Johannes Bleher

















      asked Jan 15 at 10:04









      Johannes BleherJohannes Bleher

      114




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