kubernetes 1.22|石头好可爱

kubernetes组件
kube-apiserver API服务器，公开了KubernetersAPI
etcd 减值数据库，可以作为保存，Kubernetes所有集群数据的后台数据库，
kube-scheduler调度pod到那个节点去运行，
kube-controller集群控制器，
cloud-controller 与云服务商，交互。

PVE上搭建kubernetes 1.22版本，搭建前需要做好快照。
裸机安装，
k8s 1.22.4版本， 1.24以后不支持docker 需要用podman安装插件
3台虚拟机，
192.168.31.137 k8s-master01
192.168.31.138 k8s-node1
192.168.31.139 k8s-node2

在每个节点创建文件/run/flannel/subnet.env写入以下内容，配置后等待一会就好了

FLANNEL_NETWORK=10.244.0.0/16
FLANNEL_SUBNET=10.244.0.1/24
FLANNEL_MTU=1450
FLANNEL_IPMASQ=true
在31.137上操作

 hostnamectl set-hostname k8s-master01
vim /etc/hosts
192.168.31.137  k8s-master01
192.168.31.138  k8s-node1
192.168.31.139  k8s-node2
# 所有节点关闭 SELinux
setenforce 0
sed -i --follow-symlinks 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/sysconfig/selinux
#关闭防火墙
systemctl stop firewalld
systemctl disable firewalld
#关闭swap 修改文件重启后会生效
swapoff -a
 #sed -i '/swap/s/^/#/' /etc/fstab
 
#root@hhdcloudrd7 /]# cat /etc/fstab 
#
# /etc/fstab
# Created by anaconda on Tue Apr 19 11:43:17 2022
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos_hhdcloudrd6-root /                       xfs     defaults        0 0
UUID=13a8fe45-33c8-4258-a434-133ce183d3c3 /boot                   xfs     defaults        0 0
#(把下面一行注释掉
#/dev/mapper/centos_hhdcloudrd6-swap swap                    swap    defaults        0 0
 
# 添加 k8s 安装源
cat <<EOF > kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
mv kubernetes.repo /etc/yum.repos.d/
#  安装需要的软件包， yum-util 提供yum-config-manager功能，另外两个是devicemapper驱动
yum install -y yum-utils device-mapper-persistent-data lvm2
 
#设置docker源
  yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
 安装所需组件（所有节点
yum install -y kubelet-1.22.4 kubectl-1.22.4 kubeadm-1.22.4 docker-ce
 
设置开机启动
 
systemctl enable kubelet
systemctl start kubelet
systemctl enable docker
systemctl start docker# kubernetes 官方推荐 docker 等使用 systemd 作为 cgroupdriver，否则 kubelet 启动不了
 
 
cat <<EOF > daemon.json
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "registry-mirrors": ["https://zk58d2fs.mirror.aliyuncs.com"]
}
EOF
mv daemon.json /etc/docker/
 
  重启生效
systemctl daemon-reload
systemctl restart docker
 
# 初始化集群控制台 Control plane
# 失败了可以用 kubeadm reset 重置
kubeadm init --image-repository=registry.aliyuncs.com/google_containers
==========================================================================
# 记得把 kubeadm join xxx 保存起来
# 忘记了重新获取：kubeadm token create --print-join-command
 
# 复制授权文件，以便 kubectl 可以有权限访问集群
# 如果你其他节点需要访问集群，需要从主节点复制这个文件过去其他节点
mkdir -p $HOME/.kube
cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
chown $(id -u):$(id -g) $HOME/.kube/config
 
# 在其他机器上创建 ~/.kube/config 文件也能通过 kubectl 访问到集群
 
=================================================================
 
kubeadm join 192.168.31.137:6443 --token h6q1sx.s8ctu4ulos5ymi96 \
        --discovery-token-ca-cert-hash sha256:5174edc3a891c33d2b136d2a9940ac6d23443f71ff43bf50417f8ef359087738
[root@k8s-master01 ~]# mkdir -p $HOME/.kube
[root@k8s-master01 ~]# cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
[root@k8s-master01 ~]# chown $(id -u):$(id -g) $HOME/.kube/config
 
[root@k8s-master01 ~]# kubectl get node
NAME           STATUS     ROLES                  AGE     VERSION
k8s-master01   NotReady   control-plane,master   25m     v1.22.4
k8s-node1      NotReady   <none>                 7m20s   v1.22.4
k8s-node2      NotReady   <none>                 7m36s   v1.22.4
[root@k8s-master01 ~]#

在Node1. 31.138上操作

hostnamectl set-hostname k8s-node1
vim /etc/hosts
192.168.31.137  k8s-master01
192.168.31.138  k8s-node1
192.168.31.139  k8s-node2
# 所有节点关闭 SELinux
setenforce 0
sed -i --follow-symlinks 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/sysconfig/selinux
#关闭swap 修改文件重启后会生效
swapoff -a
 #sed -i '/swap/s/^/#/' /etc/fstab
#root@hhdcloudrd7 /]# cat /etc/fstab 
#
# /etc/fstab
# Created by anaconda on Tue Apr 19 11:43:17 2022
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos_hhdcloudrd6-root /                       xfs     defaults        0 0
UUID=13a8fe45-33c8-4258-a434-133ce183d3c3 /boot                   xfs     defaults        0 0
#(把下面一行注释掉
#/dev/mapper/centos_hhdcloudrd6-swap swap                    swap    defaults        0 0
 
关闭防火墙
systemctl stop firewalld
systemctl disable firewalld
# 添加 k8s 安装源
cat <<EOF > kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
mv kubernetes.repo /etc/yum.repos.d/
  #  安装依赖包
 yum install -y yum-utils device-mapper-persistent-data lvm2   
#设置docker源
  yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
#不安装依赖包会报错
#yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
#-bash: yum-config-manager: command not found
 
设置开机启动
systemctl enable kubelet
systemctl start kubelet
systemctl enable docker
systemctl start docker
# kubernetes 官方推荐 docker 等使用 systemd 作为 cgroupdriver，否则 kubelet 启动不了
 
cat <<EOF > daemon.json
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "registry-mirrors": ["https://zk58d2fs.mirror.aliyuncs.com"]
}
EOF
mv daemon.json /etc/docker/
 
  重启生效
systemctl daemon-reload
systemctl restart docker
#讲节点加入主节点
kubeadm join 172.16.32.10:6443 --token xxx --discovery-token-ca-cert-hash xxx

在node 2 31.139上操作

hostnamectl set-hostname k8s-node2
vim /etc/hosts
192.168.31.137  k8s-master01
192.168.31.138  k8s-node1
192.168.31.139  k8s-node2
# 所有节点关闭 SELinux
setenforce 0
sed -i --follow-symlinks 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/sysconfig/selinux
#关闭swap 修改文件重启后会生效
swapoff -a
 #sed -i '/swap/s/^/#/' /etc/fstab
#root@hhdcloudrd7 /]# cat /etc/fstab 
#
# /etc/fstab
# Created by anaconda on Tue Apr 19 11:43:17 2022
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/centos_hhdcloudrd6-root /                       xfs     defaults        0 0
UUID=13a8fe45-33c8-4258-a434-133ce183d3c3 /boot                   xfs     defaults        0 0
#(把下面一行注释掉
#/dev/mapper/centos_hhdcloudrd6-swap swap                    swap    defaults        0 0
#关闭防火墙
systemctl stop firewalld
systemctl disable firewalld
# 添加 k8s 安装源
cat <<EOF > kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
mv kubernetes.repo /etc/yum.repos.d/
   # 安装依赖 包
  yum install -y yum-utils device-mapper-persistent-data lvm2
  #设置docker源
  yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
 
设置开机启动
systemctl enable kubelet
systemctl start kubelet
systemctl enable docker
systemctl start docker
# kubernetes 官方推荐 docker 等使用 systemd 作为 cgroupdriver，否则 kubelet 启动不了
 
cat <<EOF > daemon.json
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "registry-mirrors": ["https://zk58d2fs.mirror.aliyuncs.com"]
}
EOF
mv daemon.json /etc/docker/
 
  重启生效
systemctl daemon-reload
systemctl restart docker

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