Hi Simone, Yes... I guess it was not clear in my original email. I changed the numbers myself to lower the timeout and retries. With them set as they were set by ovirt (timeout=3600 retry=5) things were not working for me.
Cheers, Gervais > On Sep 29, 2016, at 10:04 AM, Simone Tiraboschi <stira...@redhat.com> wrote: > > > > On Thu, Sep 29, 2016 at 12:47 PM, Martin Perina <mper...@redhat.com > <mailto:mper...@redhat.com>> wrote: > Hi, > > please take a look at my inline comments: > > On Tue, Sep 27, 2016 at 7:23 PM, Gervais de Montbrun <gerv...@demontbrun.com > <mailto:gerv...@demontbrun.com>> wrote: > Hey All, > > Since updating to 4.0.x of oVirt, I have had an issue with my hosted engine. > After a some poking around, I think I have figured out my issue and thought I > would share to see what others think. > The issue has existed with 4.0, 4.0.1, 4.0.2, 4.0.3, and still exists in > 4.0.4. > > Description: > When my hosted engine starts it reports that it is in a degraded state with 7 > or 8 services still not started when I run systemctl status. It takes about 6 > or 7 minutes to eventually start all the services and come online. If I don't > set my cluster to Global-Maintenance mode it eventually thinks that my > hosted-engine needs to be rebooted and restarts it before it can start > everything. > > Could you please share with us logs gathered by ovirt-log-collector? > > It's just a guess but could you please take a look if you HE VM has enough > entropy? > > cat /proc/sys/kernel/random/entropy_avail > > If the value is low (below or around 200), you really need to install and > configure some entropy generator such as haveged > > > Solution: > I realized that Apache was the culprit and found that the proxy to the > ovirt-engine in /etc/httpd/conf.d/z-ovirt-engine-proxy.conf has a super long > timeout with many retries. I changed the settings and now everything works > for me. > > -> Before change: > <LocationMatch > ^/(ovirt-engine($|/)|api($|/)|RHEVManagerWeb/|OvirtEngineWeb/|ca.crt$|engine.ssh.key.txt$|rhevm.ssh.key.txt$)> > ProxyPassMatch ajp://127.0.0.1:8702 <> timeout=3600 retry=5 > > <IfModule deflate_module> > AddOutputFilterByType DEFLATE text/javascript text/css text/html > text/xml text/json application/xml application/json application/x-yaml > </IfModule> > </LocationMatch> > > -> After change: > <LocationMatch ^/ovirt-engine($|/)> > ProxyPassMatch ajp://127.0.0.1:8702 <> timeout=5 retry=2 > > <IfModule deflate_module> > AddOutputFilterByType DEFLATE text/javascript text/css text/html > text/xml text/json application/xml application/json application/x-yaml > </IfModule> > </LocationMatch> > > This one is correct for 4.0, not sure why it was not updated during > upgrade from 3.6. @Simone? > > > Honestly it's > <LocationMatch ^/ovirt-engine($|/)> > ProxyPassMatch ajp://127.0.0.1:8702 <http://127.0.0.1:8702/> > timeout=3600 retry=5 > > <IfModule deflate_module> > AddOutputFilterByType DEFLATE text/javascript text/css text/html > text/xml text/json application/xml application/json application/x-yaml > </IfModule> > </LocationMatch> > also on a fresh 4.0 engine from our latest engine-appliance. > > > If I read the timeout settings correctly, it will wait 60 minutes with 5 > retries. 5 hours is way too long for my little server to hold onto all those > apache processes. > The change I made allows for there to be an error, and also releases apache's > hold on the process. Once everything is ready, apache is ready to serve > requests and everything/everyone is happy. Before making the change, I just > get a whitescreen in my browser and then nothing works until I restart Apache > (or I end up in an endless loop of ovirt-ha services restarting my > hosted-engine. > > Well, if you have an issue with too many apache processes waiting for engine > to respond, then there's some issue in engine. As I wrote above please share > the logs with us and check entropy. > > Thanks > > Martin Perina > > > I noticed that this setting reverts to the original setting, so oVirt must be > writing this file. Perhaps these number can be changed in oVirt? If not, I > will just setup and ansible play to revert the settings with working values > and restart apache on my engine. > :-) > > Cheers, > Gervais > > > > > _______________________________________________ > Users mailing list > Users@ovirt.org <mailto:Users@ovirt.org> > http://lists.ovirt.org/mailman/listinfo/users > <http://lists.ovirt.org/mailman/listinfo/users> > > >
_______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
