Kubeadm Note Update

2 min read

准备

  • iptables

    cat <<EOF | sudo tee /etc/modules
br_netfilter
EOF
sudo modprobe br_netfilter
lsmod | grep br_netfilter


cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sudo sysctl --system

  • install container runtime

    curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository \
"deb [arch=amd64] https://download.docker.com/linux/ubuntu \
$(lsb_release -cs) \
stable"
sudo apt-get update
apt-cache madison docker-ce
sudo apt-get install docker-ce=17.12.1~ce-0~ubuntu
sudo usermod -aG docker bigo

  • setup vpn and proxy

VPN and proxy

  • install kubeadm

    curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | sudo apt-key add -
cat <<EOF | sudo tee /etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
sudo apt-get update
sudo apt-cache madison kubectl
sudo apt-get install -y kubelet=1.15.12-00 kubeadm=1.15.12-00 kubectl=1.15.12-00
sudo apt-mark hold kubelet kubeadm kubectl

  • SWAPOFF

    sudo swapoff -a

安装

kubeadm.init.yml

apiVersion: kubeadm.k8s.io/v1beta2
kind: ClusterConfiguration
clusterName: kubernetes
imageRepository: registry.aliyuncs.com/google_containers
kubernetesVersion: v1.15.12
networking:
  podSubnet: 10.244.0.0/16


KUBERNETES_RELEASE_VERSION="$(curl -sSL https://dl.k8s.io/release/stable.txt)"
kubeadm config images list
kubeadm config images pull --config kubeadm.init.yml
sudo kubeadm init --config kubeadm.init.yml  
kubectl apply -f https://docs.projectcalico.org/v3.14/manifests/calico.yaml
kubectl taint nodes --all node-role.kubernetes.io/master-
kubectl delete -f https://docs.projectcalico.org/manifests/calico.yaml

kubectl delete pod -n kube-system coredns-

kubeadm token list

pod-network-cidr should not overlap with your local netowrk

troubleshooting

  • Loop (127.0.0.1:46732 -> :53) detected for zone

    kubectl logs -n kube-system coredns-94d74667-9t778

2020-06-14T09:20:33.480Z [INFO] CoreDNS-1.3.1
2020-06-14T09:20:33.480Z [INFO] linux/amd64, go1.11.4, 6b56a9c
CoreDNS-1.3.1
linux/amd64, go1.11.4, 6b56a9c
2020-06-14T09:20:33.480Z [INFO] plugin/reload: Running configuration MD5 = 5d5369fbc12f985709b924e721217843
2020-06-14T09:20:33.481Z [FATAL] plugin/loop: Loop (127.0.0.1:46732 -> :53) detected for zone ".", see https://coredns.io/plugins/loop#troubleshooting. Query: "HINFO 5542328687544567010.7848882517153318095."

https://coredns.io/plugins/loop#troubleshooting

方法一：

kubectl edit -n kube-system cm kubelet-config-1.15

resolvConf: /opt/etc/resolv.conf

方法二：

https://tecadmin.net/disable-local-dns-caching-ubuntu/

方法三：

kubectl edit -n kube-system cm coredns

forward . /etc/resolv.conf  -> forward . 192.168.137.180
  • 系统重启后k8s没有自动启动

在/etc/fstab永久关闭swap

K8S

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