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  1. OpenShift Bugs
  2. OCPBUGS-32426

[4.15z] slow ovnkube-node initialization on large number of services with externalIps

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      * Previously, if you configured an {product-title} cluster with a high number of internal services or user-managed load balancer IP addresses, you experienced a delayed startup time for the OVN-Kubernetes service. This delay occurred when the OVN-Kubernetes service attempted to install `iptables` rules on a node. With this release, the OVN-Kubernetes service can process a large number of services in a few seconds. Additionally, you can access a new log to view the status of installing `iptables` rules on a node. (link:https://issues.redhat.com/browse/OCPBUGS-32426[*OCPBUGS-32426*])
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      * Previously, if you configured an {product-title} cluster with a high number of internal services or user-managed load balancer IP addresses, you experienced a delayed startup time for the OVN-Kubernetes service. This delay occurred when the OVN-Kubernetes service attempted to install `iptables` rules on a node. With this release, the OVN-Kubernetes service can process a large number of services in a few seconds. Additionally, you can access a new log to view the status of installing `iptables` rules on a node. (link: https://issues.redhat.com/browse/OCPBUGS-32426 [* OCPBUGS-32426 *])
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      on clusters with a large number of services with externalIPs or services from type loadBalancer the ovnkube-node initialization can take up to 50 min

      The problem is after a node reboot done by MCO the unschedule taint is removed from the node so the api allocates pods to that node that get stuck on ContrainerCreating and other nodes continue to go down for reboot making the workloads unavailable. (if no PDB exists for the workload to protect it)

            trozet@redhat.com Tim Rozet
            sscheink@redhat.com Sebastian Scheinkman
            Anurag Saxena Anurag Saxena
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