环境说明
master：192.168.100.100
node: 192.168.100.101
kubeadm 1.31.2 （自编译二进制文件，证书有效期100年）
银河麒麟v10 sp2 x86架构
内核版本：5.4.x 编译安装 cgroup v2启用
docker版本：27.x 二进制安装，cgroup v2支持
部署准备
bash
# 关闭防火墙
systemctl disable firewalld --now
# 关闭selinux
setenforce 0
sed -i 's/enforcing/disabled/' /etc/selinux/config
#关闭swap
swapoff -a
sed -ri 's/.*swap.*/#&/' /etc/fstab （永久关闭）
# 主机名与IP对应关系
vim /etc/hosts
192.168.100.100 k8s-master
192.168.100.101 k8s-node
# 添加内核优化参数
cat << EOF > /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward = 1
user.max_user_namespaces=28633
EOF
# 使其生效
sysctl -p /etc/sysctl.d/99-kubernetes-cri.conf
# 配置ipvs转发
yum install -y ipset ipvsadm
cat > /etc/sysconfig/modules/ipvs.modules <<EOF
#!/bin/bash
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack_ipv4
EOF
chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack_ipv4
bash
# 配置时间同步
dnf install chronyd -y
cat > /etc/chrony.conf <<EOF
server ntp.aliyun.com iburst
stratumweight 0
driftfile /var/lib/chrony/drift
rtcsync
makestep 10 3
bindcmdaddress 127.0.0.1
bindcmdaddress ::1
keyfile /etc/chrony.keys
commandkey 1
generatecommandkey
logchange 0.5
logdir /var/log/chrony
EOF
systemctl enable chronyd --now二进制安装docker+cri-docker+cni插件
银河麒麟v10 二进制安装cri-docker+cni插件------ 筑梦之路-CSDN博客
安装kubeadm、kubelet、kubectl
将编译的二进制文件拷贝到/usr/bin/目录下，并授可执行权限
bash
# 安装常用工具和依赖包
yum -y install wget psmisc vim net-tools nfs-utils telnet yum-utils device-mapper-persistent-data lvm2 git tar curl ipvsadm
yum install ipvsadm ipset sysstat conntrack libseccomp -y
yum install socat libnetfilter_queue libnetfilter_cttimeout conntrack-tools libnetfilter_cthelper
# 生成service文件
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=kubelet: The Kubernetes Node Agent
Documentation=https://kubernetes.io/docs/home/
Wants=network-online.target
After=network-online.target
[Service]
ExecStart=/usr/bin/kubelet
Restart=always
StartLimitInterval=0
RestartSec=10
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable kubelet
bash
# 拉取所需镜像
kubeadm config images pull --cri-socket unix:///var/run/cri-dockerd.sock --image-repository registry.aliyuncs.com/google_containers
# 初始化
kubeadm init --kubernetes-version=v1.31.2 \
--apiserver-advertise-address=192.168.100.100 \
--pod-network-cidr=10.244.0.0/16 \
--service-cidr=10.96.0.0/12 \
--token-ttl=0 \
--cri-socket unix:///var/run/cri-dockerd.sock \
--image-repository registry.aliyuncs.com/google_containers
bash
接下来在worker节点上执行相关的操作，worker节点与master节点的操作步骤的唯一区别是：master节点执行kubeadm init操作，woker节点执行kubeadm join操作，因此上面的步骤除了kubeadm init步骤之外，其他所有的步骤woker节点同样也需要执行。
执行kubeadm init 成功之后输出的 最后一行kubeadm join 命令
kubeadm config images pull --cri-socket unix:///var/run/cri-dockerd.sock --image-repository registry.aliyuncs.com/google_containers
kubeadm join 192.168.100.100:6443 --token o4zf8w.xxxx --discovery-token-ca-cert-hash sha256:376e215a51620ac6ccc --cri-socket unix:///var/run/cri-dockerd.sock
bash
# 部署flannel插件
cat > flannel.yaml << EOF
#---
#kind: Namespace
#apiVersion: v1
#metadata:
# name: kube-flannel
# labels:
# k8s-app: flannel
# pod-security.kubernetes.io/enforce: privileged
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
labels:
k8s-app: flannel
name: flannel
rules:
- apiGroups:
- ""
resources:
- pods
verbs:
- get
- apiGroups:
- ""
resources:
- nodes
verbs:
- get
- list
- watch
- apiGroups:
- ""
resources:
- nodes/status
verbs:
- patch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
labels:
k8s-app: flannel
name: flannel
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: flannel
subjects:
- kind: ServiceAccount
name: flannel
namespace: kube-system
---
apiVersion: v1
kind: ServiceAccount
metadata:
labels:
k8s-app: flannel
name: flannel
namespace: kube-system
---
kind: ConfigMap
apiVersion: v1
metadata:
name: kube-flannel-cfg
namespace: kube-system
labels:
tier: node
k8s-app: flannel
app: flannel
data:
cni-conf.json: |
{
"name": "cbr0",
"cniVersion": "0.3.1",
"plugins": [
{
"type": "flannel",
"delegate": {
"hairpinMode": true,
"isDefaultGateway": true
}
},
{
"type": "portmap",
"capabilities": {
"portMappings": true
}
}
]
}
net-conf.json: |
{
"Network": "10.244.0.0/16",
"EnableNFTables": false,
"Backend": {
"Type": "vxlan"
}
}
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds
namespace: kube-system
labels:
tier: node
app: flannel
k8s-app: flannel
spec:
selector:
matchLabels:
app: flannel
template:
metadata:
labels:
tier: node
app: flannel
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/os
operator: In
values:
- linux
hostNetwork: true
priorityClassName: system-node-critical
tolerations:
- operator: Exists
effect: NoSchedule
serviceAccountName: flannel
initContainers:
- name: install-cni-plugin
image: docker.io/flannel/flannel-cni-plugin:v1.6.0-flannel1
command:
- cp
args:
- -f
- /flannel
- /opt/cni/bin/flannel
volumeMounts:
- name: cni-plugin
mountPath: /opt/cni/bin
- name: install-cni
image: docker.io/flannel/flannel:v0.26.1
command:
- cp
args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
volumeMounts:
- name: cni
mountPath: /etc/cni/net.d
- name: flannel-cfg
mountPath: /etc/kube-flannel/
containers:
- name: kube-flannel
image: docker.io/flannel/flannel:v0.26.1
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
resources:
requests:
cpu: "100m"
memory: "50Mi"
securityContext:
privileged: false
capabilities:
add: ["NET_ADMIN", "NET_RAW"]
env:
- name: POD_NAME
valueFrom:
fieldRef:
fieldPath: metadata.name
- name: POD_NAMESPACE
valueFrom:
fieldRef:
fieldPath: metadata.namespace
- name: EVENT_QUEUE_DEPTH
value: "5000"
volumeMounts:
- name: run
mountPath: /run/flannel
- name: flannel-cfg
mountPath: /etc/kube-flannel/
- name: xtables-lock
mountPath: /run/xtables.lock
volumes:
- name: run
hostPath:
path: /run/flannel
- name: cni-plugin
hostPath:
path: /opt/cni/bin
- name: cni
hostPath:
path: /etc/cni/net.d
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
- name: xtables-lock
hostPath:
path: /run/xtables.lock
type: FileOrCreate
EOF
kubectl apply -f flannel.yaml检查证书有效期
bash
kubeadm certs check-expiration
[check-expiration] Reading configuration from the cluster...
[check-expiration] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
CERTIFICATE EXPIRES RESIDUAL TIME CERTIFICATE AUTHORITY EXTERNALLY MANAGED
admin.conf Oct 27, 2124 10:08 UTC 99y ca no
apiserver Oct 27, 2124 10:08 UTC 99y ca no
apiserver-etcd-client Oct 27, 2124 10:08 UTC 99y etcd-ca no
apiserver-kubelet-client Oct 27, 2124 10:08 UTC 99y ca no
controller-manager.conf Oct 27, 2124 10:08 UTC 99y ca no
etcd-healthcheck-client Oct 27, 2124 10:08 UTC 99y etcd-ca no
etcd-peer Oct 27, 2124 10:08 UTC 99y etcd-ca no
etcd-server Oct 27, 2124 10:08 UTC 99y etcd-ca no
front-proxy-client Oct 27, 2124 10:08 UTC 99y front-proxy-ca no
scheduler.conf Oct 27, 2124 10:08 UTC 99y ca no
super-admin.conf Oct 27, 2124 10:08 UTC 99y ca no
CERTIFICATE AUTHORITY EXPIRES RESIDUAL TIME EXTERNALLY MANAGED
ca Oct 27, 2124 10:08 UTC 99y no
etcd-ca Oct 27, 2124 10:08 UTC 99y no
front-proxy-ca Oct 27, 2124 10:08 UTC 99y no 至此使用自编译的kubeadm，证书有效期100年搭建k8s集群完成，仅供参考。
此种方式搭建k8s集群，仍然使用docker作为runtime运行时，和直接使用containerd作为runtime性能上稍差，相对来说docker生态更加完善，使用习惯不变。