OpenShift Node runs out of memory and loses communication on the SDN

Solution Unverified - Updated -

Issue

  • OpenShift Node runs out of memory which causes the SDN to go down and the Node service to restart on a loop. The following messages were seen in the logs:

    kernel: Out of memory: Kill process 1087 (ovs-vswitchd) score 2 or sacrifice child
    
    atomic-openshift-node[82445]: I0427 14:24:37.047317   82445 common.go:236] Waiting for SDN pod network to be ready...
    
    systemd[1]: atomic-openshift-node.service start operation timed out. Terminating.
    
    ovs-vsctl[82510]: ovs|00002|fatal_signal|WARN|terminating with signal 15 (Terminated)
    
    atomic-openshift-node[82445]: F0427 14:24:40.329274   82445 node.go:175] SDN Node failed: Failed to start plugin: /usr/bin/ovs-vsctl failed: '/usr/bin/ovs-vsctl --if-exists del-br br0 -- add-br br0 -- set Bridge br0 fail-mode=secure protocols=OpenFlow13': signal: terminated
    

Environment

OpenShift Container Platform 3.0+

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