Node network setup
by spfma.tech＠e.mail.fr
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Hi, I am trying to setup a cluster of two nodes, with self hoste Engine=
. Things went fine for the first machine, but it as rather messy about t=
he second one. I would like to have load balancing and failover for both=
management network and storage (NFS repository). So what should I exa=
ctly do to get a working network stack which can be recognized when I tr=
y to add this host to the cluster ? Have tried configuring bonds and b=
riges using Cockpit, using manual "ifcfg" files, but all the time I see=
the bridges and the bonds not linked in the Engine interface, so the ne=
w host cannot be enrolled. If I try to link "ovirtmgmt" to the the assoc=
iated bond, I have a connectivity loss because it is the management devi=
ce, and I have te restart the network services. As management configurat=
ion is not OK, I can't setup the storage connection. And if I just try=
to activate the host, I will install and configure things and then comp=
lain about missing "ovirtmgmt" and "nfs" networks, which both exist and=
work and Centos level. The interface, bonds and bridge names are copy=
/paste from the first server. # brctl show ovirtmgmt=0Abridge name bri=
dge id STP enabled interfaces=0Aovirtmgmt 8000.44a842394200 no bond0 # i=
p addr show bond0=0A33: bond0: mtu 1500 qdisc noqueue master ovirtmgmt=
state UP qlen 1000=0A link/ether 44:a8:42:39:42:00 brd ff:ff:ff:ff:ff:f=
f=0A inet6 fe80::46a8:42ff:fe39:4200/64 scope link =0A valid_lft forever=
preferred_lft forever=0A# ip addr show em1=0A2: em1: mtu 1500 qdisc mq=
master bond0 state UP qlen 1000=0A link/ether 44:a8:42:39:42:00 brd ff:=
ff:ff:ff:ff:ff=0A# ip addr show em3=0A4: em3: mtu 1500 qdisc mq master=
bond0 state UP qlen 1000=0A link/ether 44:a8:42:39:42:00 brd ff:ff:ff:f=
f:ff:ff By the way, is it mandatory to stop and disable NetworkManager=
or not ? Thanks for any kind of help :-)
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<div>Hi,</div>=0A<div>=0A<div>I am trying to setup a cluster of two node=
s, with self hoste Engine.</div>=0A<div>Things went fine for the first m=
achine, but it as rather messy about the second one.</div>=0A<div>I woul=
d like to have load balancing and failover for both management network a=
nd storage (NFS repository).</div>=0A<div> </div>=0A<div>So what sh=
ould I exactly do to get a working network stack which can be recognized=
when I try to add this host to the cluster ?</div>=0A<div> </div>=
=0A<div>Have tried configuring bonds and briges using Cockpit, using man=
ual "ifcfg" files, but all the time I see the bridges and the bonds not=
linked in the Engine interface, so the new host cannot be enrolled.</di=
v>=0A<div>If I try to link "ovirtmgmt" to the the associated bond, I hav=
e a connectivity loss because it is the management device, and I have te=
restart the network services. As management configuration is not OK, I=
can't setup the storage connection.</div>=0A<div> </div>=0A<div>An=
d if I just try to activate the host, I will install and configure thing=
s and then complain about missing "ovirtmgmt" and "nfs" networks, which=
both exist and work and Centos level.</div>=0A<div> </div>=0A<div>=
The interface, bonds and bridge names are copy/paste from the first serv=
er.</div>=0A<div> </div>=0A<div># brctl show ovirtmgmt<br />bridge=
name bridge id S=
TP enabled interfaces<br />ovirtmgmt  =
; 8000.44a842394200 no &=
nbsp; bond0</div>=0A<div># ip addr show bond0<br />33:=
bond0: <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP> mtu 1500 qdisc no=
queue master ovirtmgmt state UP qlen 1000<br /> link/e=
ther 44:a8:42:39:42:00 brd ff:ff:ff:ff:ff:ff<br /> ine=
t6 fe80::46a8:42ff:fe39:4200/64 scope link <br />  =
; valid_lft forever preferred_lft forever<br /># ip addr sho=
w em1<br />2: em1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 150=
0 qdisc mq master bond0 state UP qlen 1000<br /> link/=
ether 44:a8:42:39:42:00 brd ff:ff:ff:ff:ff:ff<br /># ip addr show em3<br=
/>4: em3: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc=
mq master bond0 state UP qlen 1000<br /> link/ether 4=
4:a8:42:39:42:00 brd ff:ff:ff:ff:ff:ff</div>=0A<div> </div>=0A<div>=
By the way, is it mandatory to stop and disable NetworkManager or not ?<=
/div>=0A<div> </div>=0A<div>Thanks for any kind of help :-)</div>=
=0A</div>
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6 years, 9 months
Upgrade via reinstall?
by Jamie Lawrence
Hello,
I currently have an Ovirt 4.1.8 installation with a hosted engine using Gluster for storage, with the DBs hosted on a dedicated PG cluster.
For reasons[1], it seems possibly simpler for me to upgrade our installation by reinstalling rather than upgrading. In this case, I can happily bring down the running VMs/otherwise do things that one normally can't.
Is there any technical reason I can't/shouldn't rebuild from bare-metal, including creating a fresh hosted engine, without losing anything? I suppose a different way of asking this is, is there anything on the engine/host filesystems that I should preserve/restore for this to work?
Thanks,
-j
[1] If this isn't an option, I'll go in to them in order to figure out a plan B; just avoiding a lot of backstory that isn't needed for the question.
6 years, 9 months
kernel perf messages should I warn?
by Gianluca Cecchi
Hello,
I have passed storage san of a 4.1.8 test env from an HP MSA2000 to an IBM
V3700
I'm doing some basic tests inside a VM and sometimes I see this kind of
messages
kernel: perf: interrupt took too long (6813 > 6810), lowering
kernel.perf_event_max_sample_rate to 29000
that I didn't see when using the MSA
Should I worry about them?
Thanks,
Gianluca
6 years, 9 months
Re: [ovirt-users] Engine VM cannot be migrated
by carl langlois
When installing your host make sure you select the deploy in the hosted
engine tab. You should just re install it with this option.
Carl
Le 31 janv. 2018 12:51, <spfma.tech(a)e.mail.fr> a écrit :
Hi,
What can prevent the hosted engine VM from being migrated ?
I can migrate any other VM in the cluster (same servers), and it is
supposed to be configured to be migrated manually or automatically as far
as I can see.
Regards
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6 years, 9 months
No available Host to migrate to
by spfma＠mail.fr
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Hi, What are the reasons that can cause this message to appear, in a clu=
ster where most machines are able to migrate without problem ? I have th=
is problem for the Engine VM and managed to solved it for another one wh=
ich configuration prevented any kind of migration. Regards
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<div> </div>=0A<div>Hi,</div>=0A<div>What are the reasons that can=
cause this message to appear, in a cluster where most machines are able=
to migrate without problem ?</div>=0A<div>I have this problem for the E=
ngine VM and managed to solved it for another one which configuration pr=
evented any kind of migration.</div>=0A<div>Regards</div>
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6 years, 9 months
engine add hosts
by 李强华
hello~，I want to add hosts ，but my host offline , can not connect to internal .engine add hosts , the message： installing hosts node failed . My engine was setup successful , i use engine-setup --offline OK，please help~
[cid:4eed0bd5-8485-41c4-b73b-b82855c988e7]
[cid:06876a73-d34b-435f-8479-32aec82c5a0b]
6 years, 9 months
