1. Base Packages Kubernetes version ≥ 1.18 socat Required conntrack Required ebtables Optional, but recommended ipset Optional, but recommended ipvsadm Optional, but recommended 1 apt-get -y install socat conntrack ebtables ipset ipvsadm 2. Port Requirements 2.1 Base Node Services Service Protocol Action Start Port End Port Comment ssh TCP allow 22 22 Node remote management docker TCP allow 2375 2376 Docker remote communication etcd TCP allow 2379 2380 etcd cluster communication 2.

1. Calico 1.1 BIRD is not ready 1 kubectl -n kube-system get pod calico-node-xxx stays at 0/1 and never comes up, reporting calico/node is not ready: BIRD is not ready: BGP not established with Solution: Calico uses first-found by default, meaning it takes the NodeIP from the first NIC it finds.

Here a Windows node is used mainly as a Worker, while the Master control plane stays on Linux. 1. System Configuration 1.1 Kubernetes Control Plane Since version 1.14, Kubernetes has added production-grade support for Windows nodes. Because Microsoft’s official documentation mainly covers installing the flannel network plugin, it is recommended here that Kubernetes also use the flannel plugin.

When installing Kubernetes with KubeSpray, the following error occurs 1 2 3 4 5 6 fatal: [node0]: FAILED! => { "assertion": "ip in ansible_all_ipv4_addresses", "changed": false, "evaluated_to": false, "failed": true } Check the inventory.ini configuration 1 2 3 4 5 6 7 cat inventory.ini # ## Configure 'ip' variable to bind kubernetes services on a # ## different ip than the default iface # ## We should set etcd_member_name for etcd cluster.

1. CNI Problems Error log 1 2 journalctl -u kubelet ...Unable to update cni config: No networks found in /etc/cni/net.d Because no CNI is installed, you need to remove --network-plugin=cni from the parameters in /var/lib/kubelet/kubeadm-flags.env. 1 2 cat /var/lib/kubelet/kubeadm-flags.env KUBELET_KUBEADM_ARGS="--cgroup-driver=systemd --pod-infra-container-image=k8s.gcr.io/pause:3.1" 2. Node NotReady There can be many reasons for a node being NotReady.