I =3D noticed that this setting reverts to the original setting, so oVirt must = =3D be writing this file. Perhaps these number can be changed in oVirt? If =3D not, I will just setup and ansible play to revert the settings with =3D working values and restart apache on my engine.

:-)

Cheers,
Gervais

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On Tue, Sep 27, 2016 at 7:23 PM, Gervais de Montbrun 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 a= nd > 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. > =E2=80=8BCould you please share with us logs gathered by ovirt-log-collecto= r? 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: > > OvirtEngineWeb/|ca.crt$|engine.ssh.key.txt$|rhevm.ssh.key.txt$)> > ProxyPassMatch ajp://127.0.0.1:8702 timeout=3D3600 retry=3D5 > > > AddOutputFilterByType DEFLATE text/javascript text/css > text/html text/xml text/json application/xml application/json > application/x-yaml > > > > > -> After change: > > > ProxyPassMatch ajp://127.0.0.1:8702 timeout=3D5 retry=3D2 > > > AddOutputFilterByType DEFLATE text/javascript text/css > text/html text/xml text/json application/xml application/json > application/x-yaml > > > > =E2=80=8BThis one is correct for 4.0=E2=80=8B =E2=80=8B, not sure why it was not updated during upgrade from 3.6. @Simone? =E2=80=8B > > 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. > =E2=80=8BWell, 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 =E2=80=8B > > 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 no= t, > 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(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > > --===============7586538229997345221== Content-Type: text/html MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="attachment.html" PGRpdiBkaXI9Imx0ciI+PGRpdiBzdHlsZT0iZm9udC1mYW1pbHk6YXJpYWwsaGVsdmV0aWNhLHNh bnMtc2VyaWYiIGNsYXNzPSJnbWFpbF9kZWZhdWx0Ij5IaSw8YnI+PGJyPjwvZGl2PjxkaXYgc3R5 bGU9ImZvbnQtZmFtaWx5OmFyaWFsLGhlbHZldGljYSxzYW5zLXNlcmlmIiBjbGFzcz0iZ21haWxf ZGVmYXVsdCI+cGxlYXNlIHRha2UgYSBsb29rIGF0IG15IGlubGluZSBjb21tZW50czo8YnI+PC9k aXY+PGRpdiBjbGFzcz0iZ21haWxfZXh0cmEiPjxicj48ZGl2IGNsYXNzPSJnbWFpbF9xdW90ZSI+ T24gVHVlLCBTZXAgMjcsIDIwMTYgYXQgNzoyMyBQTSwgR2VydmFpcyBkZSBNb250YnJ1biA8c3Bh 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I do not sure if it relates to the problem. About entropy level check the bug https://bugzilla.redhat.com/show_bug.cgi?id=3D1357246. Best Regards On Thu, Sep 29, 2016 at 1:47 PM, Martin Perina wrote: > Hi, > > please take a look at my inline comments: > > On Tue, Sep 27, 2016 at 7:23 PM, Gervais de Montbrun < > gervais(a)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 eventual= ly >> thinks that my hosted-engine needs to be rebooted and restarts it before= it >> can start everything. >> > > =E2=80=8BCould you please share with us logs gathered by ovirt-log-collec= tor? > > 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: >> >> > RHEVManagerWeb/|OvirtEngineWeb/|ca.crt$|engine.ssh.key.txt$| >> rhevm.ssh.key.txt$)> >> ProxyPassMatch ajp://127.0.0.1:8702 timeout=3D3600 retry=3D5 >> >> >> AddOutputFilterByType DEFLATE text/javascript text/css >> text/html text/xml text/json application/xml application/json >> application/x-yaml >> >> >> >> >> -> After change: >> >> >> ProxyPassMatch ajp://127.0.0.1:8702 timeout=3D5 retry=3D2 >> >> >> AddOutputFilterByType DEFLATE text/javascript text/css >> text/html text/xml text/json application/xml application/json >> application/x-yaml >> >> >> >> > =E2=80=8BThis one is correct for 4.0=E2=80=8B > =E2=80=8B, not sure why it was not updated during upgrade from 3.6. @Simo= ne? > =E2=80=8B > > >> >> 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 chang= e, >> 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. >> > > =E2=80=8BWell, if you have an issue with too many apache processes waitin= g 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 > =E2=80=8B > > >> >> 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 work= ing >> values and restart apache on my engine. >> :-) >> >> Cheers, >> Gervais >> >> >> >> >> _______________________________________________ >> Users mailing list >> Users(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users >> >> > > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users > > --===============3606106474461512155== Content-Type: text/html MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="attachment.html" PGRpdiBkaXI9Imx0ciI+V2UgaGF2ZSB0aGUgc2FtZSBjb25maWd1cmF0aW9uIHVuZGVyIHRoZSBm aWxlIC9ldGMvaHR0cGQvY29uZi5kL3otb3ZpcnQtZW5naW5lLXByb3h5LmNvbmYgwqBmb3IgdGhl IHJlZ3VsYXIgZW5naW5lIHVuZGVyIDMuNiBhbmQgNC4wLCBzbyBJIGRvIG5vdCBzdXJlIGlmIGl0 IHJlbGF0ZXMgdG8gdGhlIHByb2JsZW0uPGRpdj5BYm91dCBlbnRyb3B5IGxldmVsIGNoZWNrIHRo 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--===============3606106474461512155==-- From gervais at demontbrun.com Thu Sep 29 08:52:02 2016 Content-Type: multipart/mixed; boundary="===============6484840784968530656==" MIME-Version: 1.0 From: Gervais de Montbrun To: users at ovirt.org Subject: Re: [ovirt-users] oVirt 4.0.x - hosted-engine was not starting properly Date: Thu, 29 Sep 2016 09:51:59 -0300 Message-ID: In-Reply-To: CAP5iht7RWuTxuJT42eiCmQ_ZtPQc_Xq7WZ7Go3Aj69eHcvGJhw@mail.gmail.com --===============6484840784968530656== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable --Apple-Mail=3D_B51077DC-F506-4239-9A68-4C1B6F0E0FC4 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=3Dutf-8 Hi Martin, The entropy was super low. Somewhere around 140. I installed and =3D configured haveged.service to start at bootup, reverted my apache =3D changes... After a reboot, my systemctl status still says that there are = =3D 7 services queued (note that I erroneously said degraded in my previous =3D email - the services are, in fact, queued), but the oVirt GUI comes up =3D almost immediately and everything seems to be great. Thank you for the tip. You solved my issue. Cheers, Gervais > On Sep 29, 2016, at 7:47 AM, Martin Perina wrote: >=3D20 > Hi, >=3D20 > please take a look at my inline comments: >=3D20 > On Tue, Sep 27, 2016 at 7:23 PM, Gervais de Montbrun =3D > wrote: > Hey All, >=3D20 > Since updating to 4.0.x of oVirt, I have had an issue with my hosted =3D engine. After a some poking around, I think I have figured out my issue =3D 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 =3D in 4.0.4. >=3D20 > Description: > When my hosted engine starts it reports that it is in a degraded state = =3D with 7 or 8 services still not started when I run systemctl status. It =3D takes about 6 or 7 minutes to eventually start all the services and come = =3D online. If I don't set my cluster to Global-Maintenance mode it =3D eventually thinks that my hosted-engine needs to be rebooted and =3D restarts it before it can start everything. >=3D20 > =3DE2=3D80=3D8BCould you please share with us logs gathered by =3D ovirt-log-collector? >=3D20 > It's just a guess but could you please take a look if you HE VM has =3D enough entropy? >=3D20 > cat /proc/sys/kernel/random/entropy_avail >=3D20 > If the value is low (below or around 200), you really need to install = =3D and configure some entropy generator such as haveged >=3D20 >=3D20 > Solution: > I realized that Apache was the culprit and found that the proxy to the = =3D ovirt-engine in /etc/httpd/conf.d/z-ovirt-engine-proxy.conf has a super =3D long timeout with many retries. I changed the settings and now =3D everything works for me. >=3D20 > -> Before change: > > ProxyPassMatch ajp://127.0.0.1:8702 <> timeout=3D3D3600 retry=3D3= D5 >=3D20 > > AddOutputFilterByType DEFLATE text/javascript text/css =3D text/html text/xml text/json application/xml application/json =3D application/x-yaml > > >=3D20 > -> After change: > > ProxyPassMatch ajp://127.0.0.1:8702 <> timeout=3D3D5 retry=3D3D2 >=3D20 > > AddOutputFilterByType DEFLATE text/javascript text/css =3D text/html text/xml text/json application/xml application/json =3D application/x-yaml > > >=3D20 > =3DE2=3D80=3D8BThis one is correct for 4.0=3DE2=3D80=3D8B=3DE2=3D80=3D8B,= not sure why =3D it was not updated during upgrade from 3.6. @Simone? > =3DE2=3D80=3D8B=3D20 >=3D20 > If I read the timeout settings correctly, it will wait 60 minutes with = =3D 5 retries. 5 hours is way too long for my little server to hold onto all = =3D those apache processes. > The change I made allows for there to be an error, and also releases =3D apache's hold on the process. Once everything is ready, apache is ready =3D to serve requests and everything/everyone is happy. Before making the =3D change, I just get a whitescreen in my browser and then nothing works =3D until I restart Apache (or I end up in an endless loop of ovirt-ha =3D services restarting my hosted-engine. >=3D20 > =3DE2=3D80=3D8BWell, if you have an issue with too many apache processes = =3D waiting for engine to respond, then there's some issue in engine. As I =3D wrote above please share the logs with us and check entropy. >=3D20 > Thanks >=3D20 > Martin Perina > =3DE2=3D80=3D8B=3D20 >=3D20 > I noticed that this setting reverts to the original setting, so oVirt =3D must be writing this file. Perhaps these number can be changed in oVirt? = =3D If not, I will just setup and ansible play to revert the settings with =3D working values and restart apache on my engine. > :-) >=3D20 > Cheers, > Gervais >=3D20 >=3D20 >=3D20 >=3D20 > _______________________________________________ > Users mailing list > Users(a)ovirt.org > http://lists.ovirt.org/mailman/listinfo/users =3D >=3D20 >=3D20 --Apple-Mail=3D_B51077DC-F506-4239-9A68-4C1B6F0E0FC4 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=3Dutf-8 Hi Martin,

The entropy was super low. Somewhere around 140. I installed = =3D and configured haveged.service to start at bootup, reverted my =3D apache changes... After a reboot, my systemctl status still says that =3D there are 7 services queued (note that I erroneously said degraded in my = =3D previous email - the services are, in fact, queued), but the oVirt GUI =3D comes up almost immediately and everything seems to be great.

Thank you for the tip= . =3D You solved my issue.

Cheers,
Gervais

On Sep 29, 2016, at 7:47 AM, Martin Perina <mperina(a)redhat.com> =3D wrote:

Hi,

please take a look at my inline comments:

On Tue, Sep 27, 2016 at 7:23 PM, Gervais de =3D Montbrun <gervais(a)demontbrun.com> wrote:
Hey All,
Since updating to 4.0.x of oVirt, I = =3D have had an issue with my hosted engine. After a some poking around, I =3D think I have figured out my issue and thought I would share to see what =3D others think.
The issue has existed with 4.0, =3D 4.0.1, 4.0.2, 4.0.3, and still exists in 4.0.4.

Description:
Wh= en =3D my hosted engine starts it reports that it is in a degraded state with 7 = =3D or 8 services still not started when I run systemctl status. It takes =3D about 6 or 7 minutes to eventually start all the services and come =3D online. If I don't set my cluster to Global-Maintenance mode it =3D eventually thinks that my hosted-engine needs to be rebooted and =3D restarts it before it can start everything.

=3DE2=3D80=3D8BCould you please share with us log= s =3D gathered by ovirt-log-collector?

It's just= =3D a guess but could you please take a look if you HE VM has enough =3D entropy?

cat =3D /proc/sys/kernel/random/entropy_avail

If the value is low (below or around 200), = =3D you really need to install and configure some entropy generator such as =3D haveged

Solution:
I =3D realized that Apache was the culprit and found that the proxy to the =3D ovirt-engine in /etc/httpd/conf.d/z-ovirt-engine-proxy.conf has a super long timeout with many retries. = =3D I changed the settings and now everything works for me.

-> Before =3D change:
&nbs= p; =3D <LocationMatch ^/(ovirt-engine($|/)|api($|/)|RHEVManagerWeb/|OvirtEngineWeb/|ca.crt$|engine.ssh.key.txt$|rhevm.ssh.key.txt$)>
=3D ProxyPassMatch ajp://127.0.0.1:8702 =3D timeout=3D3D3600 retry=3D3D5

=
<IfModule =3D deflate_module>
=3D AddOutputFilterByType DEFLATE text/javascript text/css =3D text/html text/xml text/json application/xml application/json =3D application/x-yaml
=3D </IfModule>
=3D </LocationMatch>

-> After change:
&nbs= p; =3D <LocationMatch ^/ovirt-engine($|/)>
=3D ProxyPassMatch ajp://127.0.0.1:8702=3D timeout=3D3D5 retry=3D3D2

<IfModule =3D deflate_module>
=3D AddOutputFilterByType DEFLATE text/javascript text/css =3D text/html text/xml text/json application/xml application/json =3D application/x-yaml
=3D </IfModule>
=3D </LocationMatch>

=3DE2=3D8= 0=3D8BT=3D his one is correct for 4.0=3DE2=3D80=3D8B

=3DE2=3D8= 0=3D8B,=3D not sure why it was not updated during upgrade from 3.6. @Simone?
=3DE2=3D80=3D8B

=

If I read the timeout settings =3D correctly, it will wait 60 minutes with 5 retries. 5 hours is way too =3D long for my little server to hold onto all those apache processes. =3D

= The =3D change I made allows for there to be an error, and also releases =3D apache's hold on the process. Once everything is ready, apache is ready =3D to serve requests and everything/everyone is happy. Before making the =3D change, I just get a whitescreen in my browser and then nothing works =3D until I restart Apache (or I end up in an endless loop of ovirt-ha =3D services restarting my hosted-engine.

=3DE2=3D8= 0=3D8BW=3D ell, if you have an issue with too many apache processes waiting for =3D engine to respond, then there's some issue in engine. As I wrote above =3D please share the logs with us and check entropy.

Thanks

Martin = =3D Perina
=3DE2=3D80=3D8B

I = =3D noticed that this setting reverts to the original setting, so oVirt must = =3D be writing this file. Perhaps these number can be changed in oVirt? If =3D not, I will just setup and ansible play to revert the settings with =3D working values and restart apache on my engine.
:-)

Cheers,
Gervais

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