k8s-安装教程
kubelet版本过高，v1.24版本后kubernetes放弃docker了，所以我们安装1.24以下的。
以下操作三台主机都要做。
#关闭防火墙
systemctl stop firewalld && systemctl disable firewalld
#安装docker
curl -fsSL https://get.docker.com/ | sh
#修改docker仓库在 /etc/docker 创建 daemon.json
{
"registry-mirrors": ["https://3yhtn13w.mirror.aliyuncs.com"],
"exec-opts": ["native.cgroupdriver=systemd"]
}
#启动docker
systemctl enable docker && systemctl start docker
#修改主机名
hostnamectl set-hostname k8s-master1
hostnamectl set-hostname k8s-node1
hostnamectl set-hostname k8s-node2
#设置主机映射 vim /etc/hosts
192.168.180.137 k8s-master1
192.168.180.133 k8s-node1
192.168.180.134 k8s-node2
#Linux系统禁用swap分区
swapoff -a
vi /etc/fstab
#/dev/mapper/centos-swap swap swap defaults 0 0
#将 SELinux 设置为 permissive 模式（相当于将其禁用）
setenforce 0
sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
#拉去k8s配置文件
cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
exclude=kubelet kubeadm kubectl
EOF
#安装kubelet kubeadm kubectl
yum list --showduplicates kubeadm --disableexcludes=kubernetes #查询版本
yum install -y kubelet-1.23.11-0 kubeadm-1.23.11-0 kubectl-1.23.11-0 --disableexcludes=kubernetes #安装
#启动kubelet
systemctl enable kubelet && systemctl start kubelet
以下操作仅master做
#拉资源文件
kubeadm config print init-defaults > kubeadm-init.yaml
#修改文件
imageRepository: registry.cn-hangzhou.aliyuncs.com/google_containers #镜像源
advertiseAddress: 192.168.180.137 #本机ip
name: k8s-master #主机名
networking:
serviceSubnet: 10.96.0.0/12
podSubnet: 10.244.0.0/16
#初始化kubeadm
kubeadm config images pull --config kubeadm-init.yaml #拉取镜像
kubeadm init --config=kubeadm-init.yaml #初始化
安装成功提示以下内容
Your Kubernetes control-plane has initialized successfully!
To start using your cluster, you need to run the following as a regular user:
#执行下边三行
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config #执行
sudo chown $(id -u):$(id -g) $HOME/.kube/config #执行
Alternatively, if you are the root user, you can run:
export KUBECONFIG=/etc/kubernetes/admin.conf
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:
#node加入使用以下命令
kubeadm join 192.168.180.137:6443 --token abcdef.0123456789abcdef \
--discovery-token-ca-cert-hash sha256:b73f9d773c7b7dfd29a2ad019b770a2212ea1a21abc6a9cfb7d03addd3bc48f3
Node执行上边的加入命令
master安装网络插件
vim kube-flannel.yaml 下载不下来，所以把我的复制过去就行。
---
apiVersion: policy/v1beta1
kind: PodSecurityPolicy
metadata:
name: psp.flannel.unprivileged
annotations:
seccomp.security.alpha.kubernetes.io/allowedProfileNames: docker/default
seccomp.security.alpha.kubernetes.io/defaultProfileName: docker/default
apparmor.security.beta.kubernetes.io/allowedProfileNames: runtime/default
apparmor.security.beta.kubernetes.io/defaultProfileName: runtime/default
spec:
privileged: false
volumes:
- configMap
- secret
- emptyDir
- hostPath
allowedHostPaths:
- pathPrefix: "/etc/cni/net.d"
- pathPrefix: "/etc/kube-flannel"
- pathPrefix: "/run/flannel"
readOnlyRootFilesystem: false
runAsUser:
rule: RunAsAny
supplementalGroups:
rule: RunAsAny
fsGroup:
rule: RunAsAny
allowPrivilegeEscalation: false
defaultAllowPrivilegeEscalation: false
allowedCapabilities: ['NET_ADMIN', 'NET_RAW']
defaultAddCapabilities: []
requiredDropCapabilities: []
hostPID: false
hostIPC: false
hostNetwork: true
hostPorts:
- min: 0
max: 65535
seLinux:
rule: 'RunAsAny'
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
name: flannel
rules:
- apiGroups: ['extensions']
resources: ['podsecuritypolicies']
verbs: ['use']
resourceNames: ['psp.flannel.unprivileged']
- apiGroups:
- ""
resources:
- pods
verbs:
- get
- apiGroups:
- ""
resources:
- nodes
verbs:
- list
- watch
- apiGroups:
- ""
resources:
- nodes/status
verbs:
- patch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
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:
name: flannel
namespace: kube-system
---
kind: ConfigMap
apiVersion: v1
metadata:
name: kube-flannel-cfg
namespace: kube-system
labels:
tier: node
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",
"Backend": {
"Type": "vxlan"
}
}
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds
namespace: kube-system
labels:
tier: node
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: rancher/mirrored-flannelcni-flannel-cni-plugin:v1.1.0
command:
- cp
args:
- -f
- /flannel
- /opt/cni/bin/flannel
volumeMounts:
- name: cni-plugin
mountPath: /opt/cni/bin
- name: install-cni
image: rancher/mirrored-flannelcni-flannel:v0.18.1
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: rancher/mirrored-flannelcni-flannel:v0.18.1
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
resources:
requests:
cpu: "100m"
memory: "50Mi"
limits:
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
kubectl create -f kube-flannel.yaml
等着下载完成
查看节点
