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

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