通过cri-o部署k8s集群环境
目录
一.基础环境配置（每个节点都做）
1.hosts解析
2.防火墙和selinux
3.安装基本软件并配置时间同步
4.禁用swap分区
5.更改内核参数
6.配置ipvs
7.k8s下载
（1）配置镜像下载相关软件
（2）配置kubelet上的cgroup
二.下载cri-o包（所有节点做）
1.在线下载
2.本地下载
三.配置文件（所有节点做）
1.修改crio配置文件
2.修改kubelet参数（所有节点做）
3.重启crio和kubelet
四.master节点初始化（master节点做）
五.node节点加入（node节点做）
六.添加网络插件（master节点做）
1.应用calico.yaml
2.查看验证
| 192.168.2.190 | master |
|---|---|
| 192.168.2.191 | node1-191.com |
| 192.168.2.193 | node2-193.com |
一.基础环境配置（每个节点都做）
1.hosts解析
[root@master ~]# tail -3 /etc/hosts
192.168.2.190 master
192.168.2.191 node2-191.com
192.168.2.193 node4-193.com2.防火墙和selinux
[root@master ~]# systemctl status firewalld.service;getenforce
● firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)
Active: inactive (dead)
Docs: man:firewalld(1)
Disabled
#临时
systemctl stop firewalld
setenforce 0
#禁用
systemctl disable firewalld
sed -i '/^SELINUX=/ c SELINUX=disabled' /etc/selinux/config3.安装基本软件并配置时间同步
[root@master ~]# yum install -y wget tree bash-completion lrzsz psmisc net-tools vim chrony
[root@master ~]# vim /etc/chrony.conf
:3,6 s/^/# #注释掉原有行
server ntp1.aliyun.com iburst
[root@node1-190 ~]# systemctl restart chronyd
[root@node1-190 ~]# chronyc sources
210 Number of sources = 1
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
^* 120.25.115.20 2 8 341 431 -357us[ -771us] +/- 20ms4.禁用swap分区
[root@master ~]# swapoff -a && sed -i 's/.*swap.*/#&/' /etc/fstab && free -m
total used free shared buff/cache available
Mem: 10376 943 8875 11 557 9178
Swap: 0 0 05.更改内核参数
[root@node1-190 ~]# cat >> /etc/sysctl.d/k8s.conf << EOF
vm.swappiness=0
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
EOF
[root@node1-190 ~]# modprobe br_netfilter && modprobe overlay && sysctl -p /etc/sysctl.d/k8s.conf
vm.swappiness = 0
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 16.配置ipvs
[root@node1-190 ~]# yum install ipset ipvsadm -y
[root@node1-190 ~]# cat < /etc/sysconfig/modules/ipvs.modules
#!/bin/bash
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack
EOF
# 为脚本文件添加执行权限并运行，验证是否加载成功
[root@node1-190 ~]# chmod +x /etc/sysconfig/modules/ipvs.modules && /bin/bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack_ipv4
nf_conntrack_ipv4 15053 2
nf_defrag_ipv4 12729 1 nf_conntrack_ipv4
ip_vs_sh 12688 0
ip_vs_wrr 12697 0
ip_vs_rr 12600 0
ip_vs 145458 6 ip_vs_rr,ip_vs_sh,ip_vs_wrr
nf_conntrack 139264 7 ip_vs,nf_nat,nf_nat_ipv4,xt_conntrack,nf_nat_masquerade_ipv4,nf_conntrack_netlink,nf_conntrack_ipv4
libcrc32c 12644 4 xfs,ip_vs,nf_nat,nf_conntrack 7.k8s下载
（1）配置镜像下载相关软件
[root@master ~]# cat < /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
[root@master ~]# yum install -y kubeadm kubelet kubectl
[root@master ~]# kubeadm version
kubeadm version: &version.Info{Major:"1", Minor:"28", GitVersion:"v1.28.2", GitCommit:"89a4ea3e1e4ddd7f7572286090359983e0387b2f", GitTreeState:"clean", BuildDate:"2023-09-13T09:34:32Z", GoVersion:"go1.20.8", Compiler:"gc", Platform:"linux/amd64"} （2）配置kubelet上的cgroup
[root@master ~]# cat < /etc/sysconfig/kubelet
KUBELET_EXTRA_ARGS="--cgroup-driver=systemd"
KUBE_PROXY_MODE="ipvs"
EOF
[root@master ~]# systemctl start kubelet
[root@master ~]# systemctl enable kubelet
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service. 二.下载cri-o包（所有节点做）
1.在线下载
[root@master ~]# VERSION=1.25
[root@master ~]# curl -L -o /etc/yum.repos.d/devel:kubic:libcontainers:stable.repo https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/CentOS_7/devel:kubic:libcontainers:stable.repo
ners:stable:cri-o:${VERSION}.repo https://download.opensuse.org/repositories/devel:kubic:libcontainers:stable:cri-o:${VERSION}/CentOS_7/devel:kubic:libcontainers:stable:cri-o:${VERSION}.repo % Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 359 100 359 0 0 293 0 0:00:01 0:00:01 --:--:-- 293
[root@master ~]# curl -L -o /etc/yum.repos.d/devel:kubic:libcontainers:stable:cri-o:${VERSION}.repo https://download.opensuse.org/repositories/devel:kubic:libcontainers:stable:cri-o:${VERSION}/CentOS_7/devel:kubic:libcontainers:stable:cri-o:${VERSION}.repo
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 425 100 425 0 0 353 0 0:00:01 0:00:01 --:--:-- 353
100 426 100 426 0 0 185 0 0:00:02 0:00:02 --:--:-- 4840
100 427 100 427 0 0 166 0 0:00:02 0:00:02 --:--:-- 166
100 428 100 428 0 0 151 0 0:00:02 0:00:02 --:--:-- 151
100 429 100 429 0 0 138 0 0:00:03 0:00:03 --:--:-- 0
100 381 100 381 0 0 112 0 0:00:03 0:00:03 --:--:-- 112
[root@master ~]# yum install -y cri-o2.本地下载
链接：百度网盘 请输入提取码 提取码：i7ih
三.配置文件（所有节点做）
1.修改crio配置文件
找到下面两处位置进行修改
[root@master ~]# vim /etc/crio/crio.conf
pause_image = "registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.9"
insecure_registries = ["docker.mirrors.ustc.edu.cn","dockerhub.azk8s.cn","hub-mirror.c.163.com"] 
2.修改kubelet参数（所有节点做）
将原有的KUBELET_EXTRA_ARGS修改
[root@master ~]# vim /etc/sysconfig/kubelet
KUBELET_EXTRA_ARGS="--cgroup-driver=systemd --container-runtime-endpoint='unix:///var/run/crio/crio.sock' --runtime-request-timeout=5m" 
3.重启crio和kubelet
[root@master ~]# systemctl start crio
[root@master ~]# systemctl enable crio
[root@master ~]# systemctl restart crio kubelet四.master节点初始化（master节点做）
#若初始化失败，使用这个kubeadm reset命令进行重置
[root@master ~]# kubeadm init --kubernetes-version=v1.28.2 --pod-network-cidr=10.224.0.0/16 \
> --apiserver-advertise-address=192.168.2.190 \ #修改为自己master节点的IP
> --service-cidr=10.96.0.0/12 \
> --cri-socket unix:///var/run/crio/crio.sock \
> --image-repository registry.aliyuncs.com/google_containers
......
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 #master上是普通用户操作
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
Alternatively, if you are the root user, you can run:
export KUBECONFIG=/etc/kubernetes/admin.conf #master上是普root用户操作
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/
Then you can join any number of worker nodes by running the following on each as root:
kubeadm join 192.168.2.190:6443 --token jxl4ka.4umrziv1a7xf1dpn \
--discovery-token-ca-cert-hash sha256:6903b8d024842b24fd9c25848df5980d93c42d0fcd7838fdc24ef123c5eba794
#node节点使用这行命令加入master
[root@master ~]# export KUBECONFIG=/etc/kubernetes/admin.conf五.node节点加入（node节点做）
#若加入失败，使用这个kubeadm reset命令进行重置
[root@node2-191 ~]# kubeadm join 192.168.2.190:6443 --token jxl4ka.4umrziv1a7xf1dpn \
> --discovery-token-ca-cert-hash sha256:6903b8d024842b24fd9c25848df5980d93c42d0fcd7838fdc24ef123c5eba794
[preflight] Running pre-flight checks
[preflight] Reading configuration from the cluster...
[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Starting the kubelet
[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...
This node has joined the cluster:
* Certificate signing request was sent to apiserver and a response was received.
* The Kubelet was informed of the new secure connection details.
Run 'kubectl get nodes' on the control-plane to see this node join the cluster.
[root@master ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master Ready control-plane 36m v1.28.2
node2-191.com Ready 70s v1.28.2
node4-193.com Ready 16s v1.28.2 六.添加网络插件（master节点做）
1.应用calico.yaml
[root@master ~]# wget --no-check-certificate https://projectcalico.docs.tigera.io/archive/v3.25/manifests/calico.yaml找到这行增加以下内容
[root@master ~]# vim calico.yaml
- name: IP_AUTODETECTION_METHOD
value: "interface=ens33" #ens33处为你的网卡名称
[root@master ~]# kubectl apply -f calico.yaml 
2.查看验证
#等待初始完成即可
[root@master ~]# kubectl get pod -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system calico-kube-controllers-658d97c59c-8ww2m 1/1 Running 0 3m43s
kube-system calico-node-86787 1/1 Running 0 3m43s
kube-system calico-node-jgz7g 1/1 Running 0 3m43s
kube-system calico-node-lwxg5 1/1 Running 0 3m43s
kube-system coredns-66f779496c-9tvjh 1/1 Running 0 89m
kube-system coredns-66f779496c-qzqv9 1/1 Running 0 89m
kube-system etcd-master 1/1 Running 0 89m
kube-system kube-apiserver-master 1/1 Running 0 89m
kube-system kube-controller-manager-master 1/1 Running 0 89m
kube-system kube-proxy-8nf9q 1/1 Running 0 54m
kube-system kube-proxy-sczts 1/1 Running 0 89m
kube-system kube-proxy-vrms2 1/1 Running 0 53m
kube-system kube-scheduler-master 1/1 Running 0 89m