[ovirt-users] Re: major network changes

Hi At one point we did have issue with DNS resolution(mainly the reverse lookup). But that was fix. Yes we can ping both network and vice-versa. Not sure how to multi-home the engine. Will do some research on that. I did find something in the error_log on the engine. In the /etc/httpd/logs/error_log i always get this messages. [Tue Jul 23 11:21:52.430555 2019] [proxy:error] [pid 3189] AH00959: ap_proxy_connect_backend disabling worker for (127.0.0.1) for 5s [Tue Jul 23 11:21:52.430562 2019] [proxy_ajp:error] [pid 3189] [client 10.16.248.65:35154] AH00896: failed to make connection to backend: 127.0.0.1 The 10.16.248.65 is the new address of the host that was move to the new network. Thanks & Regards Carl On Tue, Jul 23, 2019 at 11:52 AM Strahil <hunter86_bg(a)yahoo.com&gt; wrote: > According to another post in the mailing list, the Engine Hosts (that has > ovirt-ha-agent/ovirt-ha-broker running) is checking http:// > {fqdn}/ovirt-engine/services/health > > As the IP is changed, I think you need to check the URL before and after > thr mifgration. > > Best Regards, > Strahil NikolovOn Jul 23, 2019 16:41, Derek Atkins <derek(a)ihtfp.com&gt; > wrote: > > > > Hi, > > > > If I understand it correctly, the HE Hosts try to ping (or SSH, or > > otherwise reach) the Engine host. If it reaches it, then it passes the > > liveness check. If it cannot reach it, then it fails. So to me this > error > > means that there is some configuration, somewhere, that is trying to > reach > > the engine on the old address (which fails when the engine has the new > > address). > > > > I do not know where in the *host* configuration this data lives, so I > > cannot suggest where you need to change it. > > > > Can 10.16.248.x reach 10.8.236.x and vice-versa? > > > > Maybe multi-home the engine on both networks for now until you figure > it out? > > > > -derek > > > > On Tue, July 23, 2019 9:13 am, carl langlois wrote: > > > Hi, > > > > > > We have managed to stabilize the DNS udpate in out network. Now the > > > current > > > situation is. > > > I have 3 hosts that can run the engine (hosted-engine). > > > They were all in the 10.8.236.x. Now i have moved one of them in the > > > 10.16.248.x. > > > > > > If i boot the engine on one of the host that is in the 10.8.236.x the > > > engine is going up with status "good". I can access the engine UI. I > can > > > see all my hosts even the one in the 10.16.248.x network. > > > > > > But if i boot the engine on the hosted-engine host that was switch to > the > > > 10.16.248.x the engine is booting. I can ssh to it but the status is > > > always > > > " fail for liveliness check". > > > The main difference is that when i boot on the host that is in the > > > 10.16.248.x network the engine gets a address in the 248.x network. > > > > > > On the engine i have this in the > > > /var/log/ovirt-engine-dwh/ovirt-engine-dwhd.log > > > 019-07-23 > > > > 09:05:30|MFzehi|YYTDiS|jTq2w8|OVIRT_ENGINE_DWH|SampleTimeKeepingJob|Default|5|tWarn|tWarn_1|Can > > > > not sample data, oVirt Engine is not updating the statistics. Please > check > > > your oVirt Engine status.|9704 > > > the engine.log seems okey. > > > > > > So i need to understand what this " liveliness check" do(or try to > do) so > > > i > > > can investigate why the engine status is not becoming good. > > > > > > The initial deployment was done in the 10.8.236.x network. Maybe is > as > > > something to do with that. > > > > > > Thanks & Regards > > > > > > Carl > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > On Thu, Jul 18, 2019 at 8:53 AM Miguel Duarte de Mora Barroso < > > > mdbarroso(a)redhat.com&gt; wrote: > > > > > >> On Thu, Jul 18, 2019 at 2:50 PM Miguel Duarte de Mora Barroso > > >> <mdbarroso(a)redhat.com&gt; wrote: > > >> > > > >> > On Thu, Jul 18, 2019 at 1:57 PM carl langlois < > crl.langlois(a)gmail.com&gt; > > >> wrote: > > >> > > > > >> > > Hi Miguel, > > >> > > > > >> > > I have managed to change the config for the ovn-controler. > > >> > > with those commands > > >> > > ovs-vsctl set Open_vSwitch . external-ids:ovn-remote=ssl: > > >> 10.16.248.74:6642 > > >> > > ovs-vsctl set Open_vSwitch . > external-ids:ovn-encap-ip=10.16.248.65 > > >> > > and restating the services > > >> > > > >> > Yes, that's what the script is supposed to do, check [0]. > > >> > > > >> > Not sure why running vdsm-tool didn't work for you. > > >> > > > >> > > > > >> > > But even with this i still have the "fail for liveliness check" > when > > >> starting the ovirt engine. But one thing i notice with our new > network > > >> is > > >> that the reverse DNS does not work(IP -> hostname). The forward is > > >> working > > >> fine. I am trying to see with our IT why it is not working. > > >> > > > >> > Do you guys use OVN? If not, you could disable the provider, > install > > >> > the hosted-engine VM, then, if needed, re-add / re-activate it . > > >> > > >> I'm assuming it fails for the same reason you've stated initially - > > >> i.e. ovn-controller is involved; if it is not, disregard this msg :) > > >> > > > >> > [0] - > > >> > https://github.com/oVirt/ovirt-provider-ovn/blob/master/driver/scripts/se... > > >> > > > >> > > > > >> > > Regards. > > >> > > Carl > > >>