k8安装

1.安装k8s之前需要安装docker,etcd

　　因为要在k8s的pod中运行容器，需要先安装 容器运行时（Container Runtimes ）

　　几种常见的容器运行时与 Kubernetes 一起使用

　　　　　containerd

　　　　　CRI-O

　　　　    Docker Engine

　　　　　Mirantis Container Runtime

　　这边就使用docker-ce 作为pod容器运行时

　　以centos为例 

      参考文档：https://docs.docker.com/engine/install/#server

　　　　yum remove docker \

　　　　　　　　　　docker-client \

　　　　　　　　　　docker-client-latest \

　　　　　　　　　　docker-common \

　　　　　　　　　　docker-latest \

　　　　　　　　　　docker-latest-logrotate \

　　　　　　　　　　docker-logrotate \

　　　　　　　　　　docker-engine

　　　　yum install -y yum-utils

　　　　yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo

　　　　yum install docker-ce docker-ce-cli docker-compose-plugin containerd.io

　　　　到在这里docker 安装完毕 systemctl start docker 启动下

2.安装etcd 

　参考文档：https://github.com/etcd-io/etcd/releases/tag/v3.5.0

ETCD_VER=v3.5.0

# choose either URL
GOOGLE_URL=https://storage.googleapis.com/etcd
GITHUB_URL=https://github.com/etcd-io/etcd/releases/download
DOWNLOAD_URL=${GOOGLE_URL}

rm -f /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz
rm -rf /tmp/etcd-download-test && mkdir -p /tmp/etcd-download-test

curl -L ${DOWNLOAD_URL}/${ETCD_VER}/etcd-${ETCD_VER}-linux-amd64.tar.gz -o /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz
tar xzvf /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz -C /tmp/etcd-download-test --strip-components=1
rm -f /tmp/etcd-${ETCD_VER}-linux-amd64.tar.gz

/tmp/etcd-download-test/etcd --version
/tmp/etcd-download-test/etcdctl version
/tmp/etcd-download-test/etcdutl version

3.安装k8s 工具

 

cat <<EOF | sudo tee /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
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
exclude=kubelet kubeadm kubectl
EOF

# Set SELinux in permissive mode (effectively disabling it)
sudo setenforce 0
sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config

sudo yum install -y kubelet-1.23.0 kubeadm-1.23.0 kubectl-1.23.0 --disableexcludes=kubernetes

sudo systemctl enable --now kubelet

系统配置修改

cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
overlay
br_netfilter
EOF

sudo modprobe overlay
sudo modprobe br_netfilter

# sysctl params required by setup, params persist across reboots
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables  = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward                 = 1
EOF

# Apply sysctl params without reboot
sudo sysctl --system

由于k8s 1.24不包含docker-cri 所以用1.23版本

=======================================================================

初始化集群

kubeadm init --apisever-advertise-address=10.1.2.2  --image-repository registry.aliyuncs.com/google_containers --pod-network-cidr=10.1.1.0/24

 

Your Kubernetes control-plane 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:
  /docs/concepts/cluster-administration/addons/

You can now join any number of machines by running the following on each node
as root:

  kubeadm join <control-plane-host>:<control-plane-port> --token <token> --discovery-token-ca-cert-hash sha256:<hash>

有报错可以按照提示去解决

 

 mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config

如果不添加就会报错8080端口故障

现在可以kubectl get nodes master自己作为node显示

 如果master 状态为notready 需要下载

 

 

wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

然后kubeclt apply -f kube-flannel.yml

可以解决