[libvirt-users] can't establish more than 1000 connections with virsh

[dw]

在 2017年05月26日 09:42, dw 写道:
> 在 2017年05月25日 18:54, Daniel P. Berrange 写道:
>> On Thu, May 25, 2017 at 06:51:40PM +0800, dw wrote:
>>> 在 2017年05月25日 18:37, Daniel P. Berrange 写道:
>>>> On Thu, May 25, 2017 at 06:20:51PM +0800, dw wrote:
>>>>> Hi:
>>>>>
>>>>>       I'm trying to connect with libvirtd with virsh from a remote PC,but only
>>>>> can establish 1000 connections.
>>>>>
>>>>>       If try more connections,prompt:
>>>>>
>>>>>       "error: failed to connect to the hypervisor
>>>>>       error: Failed to open file '/etc/libvirt/libvirt.conf': Too many open
>>>>> files"
>>>>>
>>>>>       I tried in another PC,also get the same prompt.
>>>>>
>>>>>       Anybody know why?
>>>> There's a limit of 1024 open file handles by default on Linux. You would
>>>> have to raise that limit in /etc/security/limits.d/ for your user.
>>>>
>>> In /etc/security/limits.d/,there is only 20-nproc.conf.
>> You can create any files you want in that sub-directory - they just
>> use the same syntax as limits.conf. It means that if RPM upgrades
>> limits.conf it doesn't interfere with your changes in limits.d/custom.conf
>>
>>> I modified /etc/security/limits.conf,what I added is:
>>>
>>>          "*       soft nofile 81920
>>>          *       hard nofile 81920"
>>>
>>> I also modified /etc/pam.d/login,that I added is:
>>>
>>>      "session required        pam_limits.so"
>> I don't think that's needed - its already activated via
>> pam.d/system-auth which is included from login.
>>
>>> The output of "ulimit -a" is:
>>>
>>>      core file size          (blocks, -c) 0
>>>      data seg size           (kbytes, -d) unlimited
>>>      scheduling priority             (-e) 0
>>>      file size               (blocks, -f) unlimited
>>>      pending signals                 (-i) 385898
>>>      max locked memory       (kbytes, -l) 64
>>>      max memory size         (kbytes, -m) unlimited
>>>      open files                      (-n) 81920
>>>      pipe size            (512 bytes, -p) 8
>>>      POSIX message queues     (bytes, -q) 819200
>>>      real-time priority              (-r) 0
>>>      stack size              (kbytes, -s) 8192
>>>      cpu time               (seconds, -t) unlimited
>>>      max user processes              (-u) 385898
>>>      virtual memory          (kbytes, -v) unlimited
>>>      file locks                      (-x) unlimited
>>>
>>>
>>> What I did is right?
>> That at least shows the new limit is active
>>
>> Regards,
>> Daniel
>
> I restored  /etc/security/limits.conf and /etc/pam.d/login.
>
> And added file /etc/security/limits.d/21-nofile.conf, the content is
>
>      *       soft    nofile      10240
>      *       hard    nofile      10240"
>
> The output of "ulimit -a" now is:
>
>     core file size          (blocks, -c) 0
>     data seg size           (kbytes, -d) unlimited
>     scheduling priority             (-e) 0
>     file size               (blocks, -f) unlimited
>     pending signals                 (-i) 385898
>     max locked memory       (kbytes, -l) 64
>     max memory size         (kbytes, -m) unlimited
>     open files                      (-n) 10240
>     pipe size            (512 bytes, -p) 8
>     POSIX message queues     (bytes, -q) 819200
>     real-time priority              (-r) 0
>     stack size              (kbytes, -s) 8192
>     cpu time               (seconds, -t) unlimited
>     max user processes              (-u) 385898
>     virtual memory          (kbytes, -v) unlimited
>     file locks                      (-x) unlimited
>
>
> The related config of /etc/libvirt/libvirtd.conf is:
>
>     max_clients = 5000
>     max_queued_clients = 2000
>     min_workers = 200
>     max_workers = 2000
>     max_requests = 5000
>     max_client_requests = 2000
>
>
> Now I still get the error:
>
>     error: failed to connect to the hypervisor
>     error: Failed to open file '/etc/libvirt/libvirt.conf': Too many open files
>
>
I tried twice,and the result is:

    virsh -c qemu+tcp://remote_pc/system
    error: failed to connect to the hypervisor
    error: Failed to open file '/etc/libvirt/libvirt.conf': Too many
    open files

      virsh -c qemu+ssh://remote_pc/system
    error: failed to connect to the hypervisor
    error: Failed to open file '/proc/4931/stat': Too many open files


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://listman.redhat.com/archives/libvirt-users/attachments/20170526/ddd1eee7/attachment.htm>