This is a ansible installer problem. I had similar issue with my instalation and this is really important. Without MTU set to 1450 there is a problem with traffic between nodes. I've spent four hours debugging our MySQL galera cluster on Nodes which didn't want to synchronize but servers saw each other. It was due to MTU problem.
David Strejc t: +420734270131 e: [email protected] On Fri, Feb 12, 2016 at 9:37 AM, Per Carlson <[email protected]> wrote: > Hi. > > We are seeing some strange packet traces on the nodes, and we suspect > that it might be a MTU-issue. > > According to the documentation ( > https://docs.openshift.com/enterprise/3.1/install_config/configuring_sdn.html#configuring-the-pod-network-on-nodes) > a "mtu" parameter in node-config.yaml should be reflected on the overlay > network settings (tun0). > > But on my hosts (OSE 3.1) that's not true: > > master201 > mtu: 1450 > tun0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 > > master202 > mtu: 1450 > tun0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 > > master203 > mtu: 1450 > tun0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 > > infra201 > mtu: 1450 > tun0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 > > infra202 > mtu: 1450 > tun0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450 > > node201 > mtu: 1450 > tun0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450 > > node202 > mtu: 1450 > tun0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450 > > node203 > mtu: 1450 > tun0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1450 > > node204 > mtu: 1450 > tun0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 > > node205 > mtu: 1450 > tun0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 > > node206 > mtu: 1450 > tun0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 > > node207 > mtu: 1450 > tun0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 > > node208 > mtu: 1450 > tun0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 > > node209 > mtu: 1450 > tun0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 > > > [root@master201 ~]# oc version > oc v3.1.0.4-16-g112fcc4 > kubernetes v1.1.0-origin-1107-g4c8e6f4 > > BTW: we are using the mutitenant SDN. > > -- > Pelle > > Research is what I'm doing when I don't know what I'm doing. > - Wernher von Braun > > _______________________________________________ > users mailing list > [email protected] > http://lists.openshift.redhat.com/openshiftmm/listinfo/users > >
_______________________________________________ users mailing list [email protected] http://lists.openshift.redhat.com/openshiftmm/listinfo/users
