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# generala
adamant-kite-43734
04/25/2023, 12:26 PMThis message was deleted.
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dazzling-smartphone-16726
04/25/2023, 12:37 PM@stocky-fall-82040 Are you using firewalld or soomething similar?
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stocky-fall-82040
04/25/2023, 12:56 PMusing iptables on upstream and downstream clusters
stocky-fall-82040
04/25/2023, 12:56 PMAlso using RKE1
stocky-fall-82040
04/25/2023, 12:57 PMI just restored my 2.5.17 local cluster and everything is back to working as expected. Something happens during he upgrade process that is breaking communication or is not allowing downstream clusters to report or not allowing the local cluster to sync with the downstream clusters.
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dazzling-smartphone-16726
04/25/2023, 1:21 PMCheck the ports opened from the documentation, for me temporrary stopping firewalld worked
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jolly-processor-88759
04/25/2023, 3:57 PMSometime you need to restart a single master node for them to connect after Rancher Migrations. Have you tried cordoning and rebooting a single master node in a downstream cluster?