On Mon, May 2, 2016 at 9:15 PM, Gianluca Cecchi <gianluca.cecchi@gmail.com> wrote:
On Mon, May 2, 2016 at 8:39 PM, Gianluca Cecchi <gianluca.cecchi@gmail.com> wrote:
On Mon, May 2, 2016 at 11:14 AM, Simone Tiraboschi <stirabos@redhat.com> wrote:
Can you please check the entropy value on your host? cat /proc/sys/kernel/random/entropy_avail
I have not at hand now the server. I'll check soon and report Do you mean entropy of the physical server that will operate as hypervisor?
On the hypervisor
That's a good question. Simone - do you know if we start the guest with virtio-rng?
AFAIK we are not.
On the only existing hypervisor, just after booting and exiting global maintenance, causing hosted engine to start, I have
[root@ovirt01 ~]# uptime 20:34:17 up 6 min, 1 user, load average: 0.23, 0.20, 0.11
[root@ovirt01 ~]# cat /proc/sys/kernel/random/entropy_avail 3084
BTW on the self hosted engine VM: [root@ovirt ~]# uptime 18:35:33 up 4 min, 1 user, load average: 0.06, 0.25, 0.13
[root@ovirt ~]# cat /proc/sys/kernel/random/entropy_avail 14
On the hypervisor: [root@ovirt01 ~]# ps -ef | grep [q]emu | grep virtio-rng [root@ovirt01 ~]#
On engine VM: [root@ovirt ~]# ll /dev/hwrng ls: cannot access /dev/hwrng: No such file or directory [root@ovirt ~]#
[root@ovirt ~]# lsmod | grep virtio_rng [root@ovirt ~]#
May I change anything so that engine VM has virtio-rng enabled?
Gianluca
I verified very slow login time in webadmin after welcome page, with my configuration that is for now based on /etc/hosts. After reading a previous post, and having after about 30 minutes only 114 as entropy in hosted engine vm, I made this in engine VM:
Thanks for your report Gianluca, adding virtio-rng or adding haveged daemon to the appliance is indeed a good idea: could you please fill an RFE on bugzilla for that?
yum install haveged systemctl enable haveged
put host in global maintenance shutdown engine VM exit from maintenance
engine VM starts and immediately I have:
[root@ovirt ~]# uptime 19:05:10 up 0 min, 1 user, load average: 0.68, 0.20, 0.07
[root@ovirt ~]# cat /proc/sys/kernel/random/entropy_avail 1369
And login in web admin page now almost immediate....
Inside the thread I read: http://lists.ovirt.org/pipermail/users/2016-April/038805.html
it wasn't clear if I can edit the engine VM in webadmin (or other mean) and enable the random generator option or if the haveged way is the one to go with in case of self hosted engine.... Is there a list of what I can change (if any) and what not for the engine VM? For example I would like to change the time zone that is GMT now (I think inherited from the OVF of the appliance?)
Thanks, Gianluca