安裝一主（master）兩從（node）kubernetes集群

kubectl api-resources | grep deployment

1 基礎(chǔ)環(huán)境準(zhǔn)備

修改主機(jī)名
設(shè)置靜態(tài)IP地址
關(guān)閉交換空間

 swapoff -a
vi /etc/fstab
#/swap.img      none    swap    sw      0       0

同步時(shí)間

dpkg-reconfigure tzdata
apt-det install ntpdate
ntpdate cn.pool.ntp.org
hwclock --systohc
date

2 確定機(jī)器之間互通,以及和外網(wǎng)通訊正常

kubernetes-master

ping1.png

kubernetes-slave1

ping2.png

ping3.png

3 安裝docker作為kubenate管理的容器

參照安裝docker

4 在master節(jié)點(diǎn)上安裝 kubelet kubeadm kubectl

#1 安裝必要的一些系統(tǒng)工具
sudo apt-get update && sudo apt-get install -y apt-transport-https curl
#2 安裝GPG證書
curl https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | apt-key add - 
#3 添加kubernetes源地址（阿里云）
cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main
EOF
#4 更新并安裝kubelet kubeadm kubectl
apt-get update
apt-get install -y kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl # 標(biāo)記軟件包苞慢，不進(jìn)行更新

kubeVersion.png

5 配置和初始化kubeadm

# 1 導(dǎo)出默認(rèn)配置文件
mkdir  -p /usr/local/docker/kubernetes
cd /usr/local/docker/kubernetes/
kubeadm config print init-defaults --component-configs KubeletConfiguration > kubeadm.yml
# 2 編輯配置文件 kubeadm.yml
root@kubernetes-master:/usr/local/docker/kubernetes# vim kubeadm.yml 
root@kubernetes-master:/usr/local/docker/kubernetes# cat kubeadm.yml 

apiVersion: kubeadm.k8s.io/v1beta2
bootstrapTokens:
- groups:
  - system:bootstrappers:kubeadm:default-node-token
  token: abcdef.0123456789abcdef
  ttl: 24h0m0s
  usages:
  - signing
  - authentication
kind: InitConfiguration
localAPIEndpoint:
  advertiseAddress: 192.168.5.181 #update line  此處替換為自己master節(jié)點(diǎn)的IP
  bindPort: 6443
nodeRegistration:
  criSocket: /var/run/dockershim.sock
  name: kubernetes-master
  taints:
  - effect: NoSchedule
    key: node-role.kubernetes.io/master
---
apiServer:
  timeoutForControlPlane: 4m0s
apiVersion: kubeadm.k8s.io/v1beta2
certificatesDir: /etc/kubernetes/pki
clusterName: kubernetes
controllerManager: {}
dns:
  type: CoreDNS
etcd:
  local:
    dataDir: /var/lib/etcd
imageRepository: daocloud.io/daocloud # update line 修改下載鏡像的源
kind: ClusterConfiguration
kubernetesVersion: v1.20.1 # update line 修改為 kubeVersion.png截圖中你下載的版本
networking:
  dnsDomain: cluster.local
  podSubnet: "192.168.0.0/16" # Add line
  serviceSubnet: 10.96.0.0/12
scheduler: {}
---
apiVersion: kubelet.config.k8s.io/v1beta1
authentication:
  anonymous:
    enabled: false
  webhook:
    cacheTTL: 0s
    enabled: true
  x509:
    clientCAFile: /etc/kubernetes/pki/ca.crt
authorization:
  mode: Webhook
  webhook:
    cacheAuthorizedTTL: 0s
    cacheUnauthorizedTTL: 0s
cgroupDriver: cgroupfs
clusterDNS:
- 10.96.0.10
clusterDomain: cluster.local
cpuManagerReconcilePeriod: 0s
evictionPressureTransitionPeriod: 0s
fileCheckFrequency: 0s
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 0s
imageMinimumGCAge: 0s
kind: KubeletConfiguration
logging: {}
nodeStatusReportFrequency: 0s
nodeStatusUpdateFrequency: 0s
resolvConf: /run/systemd/resolve/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 0s
shutdownGracePeriod: 0s
shutdownGracePeriodCriticalPods: 0s
staticPodPath: /etc/kubernetes/manifests
streamingConnectionIdleTimeout: 0s
syncFrequency: 0s
volumeStatsAggPeriod: 0s

3 根據(jù)配置文件拉去鏡像
kubeadm config images pull --config kubeadm.yml

mirrorRegistory.png

4 根據(jù)配置文件初始化kubeadm
kubeadm init --config=kubeadm.yaml --upload-certs | tee kubeadm-init.log

installSuccess.png

#5.1 非ROOT用戶執(zhí)行
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
#5.2 ROOT用戶執(zhí)行
export KUBECONFIG=/etc/kubernetes/admin.conf

6 安裝網(wǎng)絡(luò)插件

kubectl apply -f https://docs.projectcalico.org/manifests/calico.yaml

7 kubenetes-node1 和 kubenetes-node2安裝kubectl kubeadm kubelet(同master安裝一樣)

#1 安裝必要的一些系統(tǒng)工具
sudo apt-get update && sudo apt-get install -y apt-transport-https curl
#2 安裝GPG證書
curl https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | apt-key add - 
#3 添加kubernetes源地址（阿里云）
cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main
EOF
#4 更新并安裝kubelet kubeadm kubectl
apt-get update
apt-get install -y kubelet kubeadm kubectl
sudo apt-mark hold kubelet kubeadm kubectl # 標(biāo)記軟件包，不進(jìn)行更新

8 kubenetes-node1 和 kubenetes-node2加入master節(jié)點(diǎn)中(installSuccess.png中倒數(shù)第二行)

在master初始化成功kubeadm的倒數(shù)第二行信息（或者kubeadm-init.log中） 不要復(fù)制

kubeadm join 192.168.5.181:6443 --token abcdef.0123456789abcdef \
    --discovery-token-ca-cert-hash sha256:0f0569ecd41c57f40e9f8a57d7f521e9b3182fc5383cee94af419754b1459186 

安裝完成，在master上查看nodes

# watch kubectl get pods --all-namespaces
kubectl get nodes

image.png

image.png

image.png

注釋 - --port=0,重啟kubelet

vim /etc/kubernetes/manifests/kube-controller-manager.yaml
vim /etc/kubernetes/manifests/kube-scheduler.yaml
systemctl restart kubelet.service

image.png