Hi! We’re observing currently packet loss on a 3 node etcd cluster (all 3 nodes on different hypervisors) on one of our open stack clusters running the victoria release deployed via kolla-ansible.
Open vSwitch Library has version 2.13.3, the ovn-controller has version 20.03.2 and the underlaying OS is Ubuntu 20.04 with current patches. We can reproduce the packet loss with this etcd setup in different projects on that cluster, but not on a second cluster (our stage env) with the same software versions and the same hardware components and same sizing. When we replace the default security group with a security group that uses the CDIR of the project network as remote security group instead of “default” in the ingress rule (IP v4 Any Any) the etcd cluster performs without packet loss/recurring leader elections. Other projects or applications seem not to be impacted. At least none that we know of. Any hints what could cause such a behavior? We suspect it's just a symptom of another problem that we are currently not aware of. Kind regards, Christian Stelter
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