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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
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