dw
2017-May-25 10:51 UTC
Re: [libvirt-users] can't establish more than 1000 connections with virsh
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. > > > Regards, > DanielIn /etc/security/limits.d/,there is only 20-nproc.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" 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?
Daniel P. Berrange
2017-May-25 10:54 UTC
Re: [libvirt-users] can't establish more than 1000 connections with virsh
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 -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|