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  • Kubernetes环境部署

    简介

    Kubernetes 是一个开源系统,用于容器化应用的自动部署、扩缩和管理。它将构成应用的容器按逻辑单位进行分组以便于管理和发现。
     
    配置镜像源

    Debian / Ubuntu

    apt-get update && apt-get install -y apt-transport-https
    curl https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | apt-key add -
    cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
    deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main
    EOF  
    apt-get update

    CentOS / RHEL / Fedora

    cat <<EOF > /etc/yum.repos.d/kubernetes.repo
    [kubernetes]
    name=Kubernetes
    baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64/
    enabled=1
    gpgcheck=1
    repo_gpgcheck=1
    gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
    EOF
    setenforce 0

    以centos为例搭建环境

    1.安装:按照顺序

    yum install kubelet-1.13.12-0
    yum install kubectl-1.13.12-0
    yum install kubeadm-1.13.12-0


    2.安装后执行如下命令,先查看需要的镜像文件:

    kubeadm config images list
    -----------------------------
    k8s.gcr.io/kube-apiserver:v1.13.12
    k8s.gcr.io/kube-controller-manager:v1.13.12
    k8s.gcr.io/kube-scheduler:v1.13.12
    k8s.gcr.io/kube-proxy:v1.13.12
    k8s.gcr.io/pause:3.1
    k8s.gcr.io/etcd:3.2.24
    k8s.gcr.io/coredns:1.2.6

    3.导入并配置对应的镜像文件

    
    docker load -i registry.aliyuncs.com.google_containers.kube-apiserver.tar
    docker image ls
    tag f07fae2c3e6a k8s.gcr.io/kube-apiserver:v1.13.12
    docker load -i registry.aliyuncs.com.google_containers.kube-controller-manager.tar
    docker image ls
    docker tag 90fd4a237264 k8s.gcr.io/kube-controller-manager:v1.13.12
    docker load -i registry.aliyuncs.com.google_containers.kube-scheduler.tar
    docker image ls
    docker tag 54f3185a42a5 k8s.gcr.io/kube-scheduler:v1.13.12
    docker load -i registry.aliyuncs.com.google_containers.kube-proxy.tar
    docker image ls
    docker tag 4022daa30d3e k8s.gcr.io/kube-proxy:v1.13.12
    docker load -i registry.aliyuncs.com.google_containers.pause.tar
    docker image ls
    docker tag da86e6ba6ca1 k8s.gcr.io/pause:3.1
    docker load -i registry.aliyuncs.com.google_containers.etcd.tar
    docker image ls
    docker tag 3cab8e1b9802 k8s.gcr.io/etcd:3.2.24
    docker load -i registry.aliyuncs.com.google_containers.coredns.tar
    docker image ls
    docker tag f59dcacceff4 k8s.gcr.io/coredns:1.2.6

    4.导入并修改好镜像名后执行

    kubeadm init --pod-network-cidr=10.244.0.0/16

    5.若出现报错

    6.执行如下命令

     kubeadm init --pod-network-cidr=10.244.0.0/16 --ignore-preflight-errors=swap

    7.执行后若出现报错:

     8.需要查看日志:

    journalctl --no-page -xeu kubelet
    --或者 journalctl
    --no-page -xeu kubelet|grep swap

     9.查看配置文件:

    cd  /usr/lib/systemd/system/kubelet.service.d
    [root@localhost kubelet.service.d]# ls
    10-kubeadm.conf

    10.找出配置文件中环境配置文件路径

    EnvironmentFile=-/etc/sysconfig/kubelet

     11.修改环境配置文件:

    KUBELET_EXTRA_ARGS="--fail-swap-on=false"

     12.重启kubeadm

    kubeadm reset

     13.再次执行

    kubeadm init --pod-network-cidr=10.244.0.0/16 --ignore-preflight-errors=swap

     14.环境搭建成功

    Your Kubernetes master has initialized successfully!
    
    To start using your cluster, you need to run the following as a regular user:
    
      mkdir -p $HOME/.kube
      sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
      sudo chown $(id -u):$(id -g) $HOME/.kube/config
    
    You should now deploy a pod network to the cluster.
    Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
      https://kubernetes.io/docs/concepts/cluster-administration/addons/
    
    You can now join any number of machines by running the following on each node
    as root:
    
      kubeadm join 192.168.4.131:6443 --token ft7m0e.i9z5x43zbaa1yk55 --discovery-token-ca-cert-hash sha256:4b3a2b2a4a164ca270d4173169eda4ec707ad16653387e6960185dcb76832837
    但行好事,莫问前程
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  • 原文地址:https://www.cnblogs.com/mingfan/p/12081699.html
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