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  • k8s部署出现的问题

    /*
    k8s部署参考:
    https://www.hangge.com/blog/cache/detail_2414.html
    https://latelee.blog.csdn.net/article/details/103774072
    
    kubeadm init --kubernetes-version=v1.21.2 --pod-network-cidr=10.244.0.0/16 --service-cidr=10.96.0.0/12
    
    出现的问题:
    1.The connection to the server localhost:8080 was refused - did you specify the right host or port?
    解决方法:
    master :
    mkdir -p $HOME/.kube
    sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
    sudo chown $(id -u):$(id -g) $HOME/.kube/config
    
    node节点:
    cp master节点$HOME/.kube/config文件到node节点$HOME/.kube/config
    
    2.flannel文件地址:
    https://github.com/flannel-io/flannel/blob/master/Documentation/kube-flannel.yml
    https://github.com/lei-all/flannel.yaml/blob/master/kube-flannel.yml
    
    3.coedns出现system:coredns 无法list endpointslices,将endpointslices权限加上即可
    */
    
    apiVersion: rbac.authorization.k8s.io/v1
    kind: ClusterRole
    metadata:
      name: system:coredns
    rules:
    - apiGroups:
      - ""
      resources:
      - endpoints
      - services
      - pods
      - namespaces
      verbs:
      - list
      - watch
    - apiGroups:
      - ""
      resources:
      - nodes
      verbs:
      - get
    - apiGroups:
      - "discovery.k8s.io"
      resources:
      - endpointslices
      verbs:
      - list
      - get
      - watch
    
    
    4.配置tab自动补全:
    	1.安装bash-completion
    	[root@master bin]# yum install bash-completion -y
    
    	2.执行bash_completion
    	[root@master bin]# source /usr/share/bash-completion/bash_completion
    
    	3.重新加载kubectl completion
    	[root@master bin]# source <(kubectl completion bash)
    
    	4.就能用tab补全命令了
    	[root@master bin]# kubectl create clusterrolebinding
    
     
    
    没安装bash-completion就会报错
    
    source <(kubectl completion bash)
    运行kubectl tab时出现以下报错
    
    [root@master bin]# kubectl c-bash: _get_comp_words_by_ref: command not found
    
    5.kubeadm reset
    ifconfig cni0 down
    ip link delete cni0
    ifconfig flannel.1 down
    ip link delete flannel.1
    rm /var/lib/cni/ -rf
    rm /etc/kubernetes/ -rf
    rm /var/lib/kubelet/ -rf 
    rm $HOME/.kube/config -rf
    
    token get:
    https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm-token/
    kubeadm token create --print-join-command
    
    #kubeadm config images list
    images=(
        kube-apiserver:v1.21.2
        kube-controller-manager:v1.21.2
        kube-scheduler:v1.21.2
        kube-proxy:v1.21.2
        pause:3.4.1
        etcd:3.4.13-0
        coredns/coredns:1.8.0
    )
    
    for imageName in ${images[@]} ; do
        docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/$imageName
        docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/$imageName k8s.gcr.io/$imageName
        docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/$imageName
    docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.8.0
    docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:1.8.0 coredns/coredns:v1.8.0
    
    
      mkdir -p $HOME/.kube
      sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
      sudo chown $(id -u):$(id -g) $HOME/.kube/config
    
    
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  • 原文地址:https://www.cnblogs.com/lajiao/p/15034860.html
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