On Sun, Apr 6, 2014 at 4:55 PM, Yedidyah Bar David <[email protected]> wrote: > ----- Original Message ----- >> From: "Andrew Lau" <[email protected]> >> To: "users" <[email protected]> >> Sent: Sunday, April 6, 2014 3:10:19 AM >> Subject: [Users] Hosted-Engine purpose for gateway check? >> >> Hi, >> >> I was recently playing around with the new ovirt 3.4 ga, I'm very >> happy all those issues I reported got fixed :D >> >> I found a new issue regarding the use of PREFIX vs NETMASK which I've >> uploaded here https://bugzilla.redhat.com/show_bug.cgi?id=1084685 >> >> Anyway -- I'm wondering what is the purpose for the gateway check in >> the hosted-engine setup? In my test case, I had the following NIC >> configuration >> >> eth0 - public (has gateway) >> eth1 - management >> eth1.1 - storage >> eth2 - vm data (no IP address) >> >> So during the hosted engine install, it will not let me assign eth2 as >> the NIC because it has no IP address or gateway. So I proceed to use >> eth1 instead as, as it has an IP address but again that would fail >> because no gateway. Luckily I have a L3 switch, so I put up a gateway >> for eth1 and that solved that issue. >> >> What is the gateway check supposed to achieve? I also tried to put in >> my eth0's IP address as the gateway but it still failed because of >> those config issues. If management/ovirtmgmt/vmdata are all on a L2 >> switch environment, effectively there becomes no gateway and it >> prevents the installation. > > It actually does not need to really be a gateway. It's used only as > part of a calculation trying to assess the liveliness of the host. > See [1] for details, especially pages 33-34. > > [1] http://www.ovirt.org/images/8/88/Hosted_Engine_Deep_Dive.pdf > -- > Didi
I've recall reading that pdf before - however my comments are a little aimed towards why does the setup require the GATEWAY=x be in the ifcfg-ethx file when it also asks for the gateway in the otopi setup. It seems a little redundant and also prevents the ability to proceed with the setup if you're in a L2 switch environment. The hosted-engine VM will require a gateway as it only has one nic and needs to be publicly accessible, so let's say we have: eth1 -> ovirtmgmt (172.16.0.10) -> hosted-engine (192.168.100.10 w/ 192.168.100.1 as gateway) Isn't 192.168.100.1 the gateway we want to be checking for? Although now that I think of it, I'm confused where the gateway check has it's example scenario, is it just for checking to make sure the hosted-engine will be externally accessible? Wouldn't it also work to do something like ethtool and check the link exists instead. _______________________________________________ Users mailing list [email protected] http://lists.ovirt.org/mailman/listinfo/users
