k8s：二進制方式搭建k8s集群

安裝步驟

• 創建多台虛擬機（三台，一台master，兩台node），安裝linux操作系統
• 操作系統初始化
• 為etcd和apiserver自簽證書
• 創建etcd集群
• 部署master組件
• 部署node
• 部署集群網絡

服務器規划

角色	IP	組件
k8s-master	192.168.161.136	kube-apiserver,kube-controller-manager,kube-scheduled,etcd,docker
k8s-node1	192.168.161.137	kubelet,kube-proxy,docker,etcd
k8s-node2	192.168.161.138	kubelet,kube-proxy,docker,etcd

系統初始化

# 關閉防火牆
systemctl stop firewalld
systemctl disable firewalld

# 關閉selinux
sed -i 's/enforcing/disabled/' /etc/selinux/config  # 永久
setenforce 0  # 臨時

# 關閉swap
swapoff -a  # 臨時
sed -ri 's/.*swap.*/#&/' /etc/fstab    # 永久

# 將橋接的IPv4流量傳遞到iptables的鏈
cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system  # 生效

# 時間同步
yum install ntpdate -y
ntpdate time.windows.com

#安裝wget
yum -y install wget

# 根據規划設置主機名,這里三台主機的hostname不一樣
hostnamectl set-hostname k8s-master
hostnamectl set-hostname k8s-node1
hostnamectl set-hostname k8s-node2

# 注意：在master添加hosts
cat >> /etc/hosts << EOF
192.168.162.136    k8s-master
192.168.162.137    k8s-node1
192.168.162.138	   k8s-node2  
EOF

生成SSL證書文件

cfssl是一個開源的證書管理工具，使用json文件生成證書，比openssl更加方便

master節點執行：

wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64
mv cfssl_linux-amd64 /usr/local/bin/cfssl
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
mv cfssl-certinfo_linux-amd64 /usr/local/bin/cfssl-certinfo

如果cfssl下載慢的話，可以用我的百度雲鏈接：

鏈接：https://pan.baidu.com/s/18rTD-cj-Z4YDppO4AXaJOQ
提取碼：6666

mkdir -p ~/TLS/{etcd,k8s}
cd ~/TLS/etcd

證書的配置和生成

cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "www": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF
 
cat > ca-csr.json <<EOF
{
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}
EOF

cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

cat > server-csr.json <<EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.162.136",
    "192.168.162.137",
    "192.168.162.138"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}
EOF

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server

執行 ls *.pem,有以下四個文件，則安裝成功

部署etcd集群

下載etcd軟件包

etcd-v3.3.25-linux-amd64.tar.gz，把下載的壓縮包放到~目錄下，解壓。

復制相關文件

[root@localhost ~]# mkdir /opt/etcd/{cfg,bin,ssl} -p
[root@localhost ~]# mv ./etcd-v3.3.25-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/
[root@localhost ~]# cp  ~/TLS/etcd/{ca*pem,server*pem} /opt/etcd/ssl/

vi /opt/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd01"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.162.136:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.162.136:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.162.136:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.162.136:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.162.136:2380,etcd02=https://192.168.162.137:2380,etcd03=https://192.168.162.138:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

參數詳解：

ETCD_NAME 節點名稱
ETCD_DATA_DIR 數據目錄
ETCD_LISTEN_PEER_URLS 集群通信監聽地址
ETCD_LISTEN_CLIENT_URLS 客戶端訪問監聽地址
ETCD_INITIAL_ADVERTISE_PEER_URLS 集群通告地址
ETCD_ADVERTISE_CLIENT_URLS 客戶端通告地址
ETCD_INITIAL_CLUSTER 集群節點地址
ETCD_INITIAL_CLUSTER_TOKEN 集群Token
ETCD_INITIAL_CLUSTER_STATE 加入集群的當前狀態，new是新集群，existing表示加入已有集群

systemd 管理 etcd

cat > /usr/lib/systemd/system/etcd.service << EOF
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=/opt/etcd/cfg/etcd
ExecStart=/opt/etcd/bin/etcd \
--name=${ETCD_NAME} \
--data-dir=${ETCD_DATA_DIR} \
--listen-peer-urls=${ETCD_LISTEN_PEER_URLS} \
--listen-client-urls=${ETCD_LISTEN_CLIENT_URLS},http://127.0.0.1:2379 \
--advertise-client-urls=${ETCD_ADVERTISE_CLIENT_URLS} \
--initial-advertise-peer-urls=${ETCD_INITIAL_ADVERTISE_PEER_URLS} \
--initial-cluster=${ETCD_INITIAL_CLUSTER} \
--initial-cluster-token=${ETCD_INITIAL_CLUSTER_TOKEN} \
--initial-cluster-state=new \
--cert-file=/opt/etcd/ssl/server.pem \
--key-file=/opt/etcd/ssl/server-key.pem \
--peer-cert-file=/opt/etcd/ssl/server.pem \
--peer-key-file=/opt/etcd/ssl/server-key.pem \
--trusted-ca-file=/opt/etcd/ssl/ca.pem \
--peer-trusted-ca-file=/opt/etcd/ssl/ca.pem
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

復制文件到兩個node節點

scp -r /opt/etcd root@192.168.162.137:/opt
scp -r /opt/etcd root@192.168.162.138:/opt
scp -r /usr/lib/systemd/system/etcd.service root@192.168.162.137:/usr/lib/systemd/system/etcd.service
scp -r /usr/lib/systemd/system/etcd.service root@192.168.162.138:/usr/lib/systemd/system/etcd.service

每一台node節點的etcd配置都需要修改

服務啟動

systemctl daemon-reload
systemctl enable etcd
systemctl start etcd #配置完畢第一個etcd節點之后，啟動一個節點的話，是無法正常啟動的，需要保證其它兩個節點etcd服務處理監聽狀態

etcd集群健康檢查

ln -s /opt/etcd/bin/etcdctl  /usr/bin/

etcdctl --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.162.136:2379,https://192.168.162.137:2379,https://192.168.162.138:2379" cluster-health

看到三個節點都是health，則搭建成功

部署master組件

為master節點生成證書

* 添加可信任ip列表
* 攜帶ca證書發送

下載：https://dl.k8s.io/v1.19.2/kubernetes-server-linux-amd64.tar.gz

mkdir -p /opt/kubernetes/{cfg,bin,ssl}
tar zxvf kubernetes-server-linux-amd64.tar.gz
mv ./kubernetes/server/bin/{kube-apiserver,kube-controller-manager,kube-scheduler,kubectl} /opt/kubernetes/bin/

cd ~/TLS/k8s
cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF
 
cat > ca-csr.json <<EOF
{
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}
EOF

cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

cat > server-csr.json<< EOF
{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "192.168.162.136",
      "192.168.162.137",
      "192.168.162.138",
      "192.168.162.139",
      "192.168.162.140",
      "kubernetes",
      "kubernetes.default",
      "kubernetes.default.svc",
      "kubernetes.default.svc.cluster",
      "kubernetes.default.svc.cluster.local"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server

cp /root/k8s/k8s-cert/{ca.pem,ca-key.pem,server.pem,server-key.pem} /opt/kubernetes/ssl/

配置apiserver：

 vi /opt/kubernetes/cfg/kube-apiserver
 
KUBE_APISERVER_OPTS="--logtostderr=false \
--log-dir=/opt/kubernetes/logs \
--v=4 \
--etcd-servers=https://192.168.162.136:2379,https://192.168.162.137:2379,https://192.168.162.138:2379 \
--bind-address=192.168.162.136 \
--secure-port=6443 \
--advertise-address=192.168.162.136 \
--allow-privileged=true \
--service-cluster-ip-range=10.0.0.0/24 \
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \
--authorization-mode=RBAC,Node \
--kubelet-https=true \
--enable-bootstrap-token-auth \
--token-auth-file=/opt/kubernetes/cfg/token.csv \
--service-node-port-range=30000-50000 \
--tls-cert-file=/opt/kubernetes/ssl/server.pem \
--tls-private-key-file=/opt/kubernetes/ssl/server-key.pem \
--client-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \
--etcd-cafile=/opt/etcd/ssl/ca.pem \
--etcd-certfile=/opt/etcd/ssl/server.pem \
--etcd-keyfile=/opt/etcd/ssl/server-key.pem"


BOOTSTRAP_TOKEN=0fb61c46f8991b718eb38d27b605b008         #自定義tokey變量值
cat > token.csv <<EOF
${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF

mv token.csv /opt/kubernetes/cfg/

kube-apiserver參數說明：

--logtostderr 啟用日志
---v 日志等級
--etcd-servers etcd集群地址
--bind-address 監聽地址
--secure-port https安全端口
--advertise-address 集群通告地址
--allow-privileged 啟用授權
--service-cluster-ip-range Service虛擬IP地址段
--enable-admission-plugins 准入控制模塊
--authorization-mode 認證授權，啟用RBAC授權和節點自管理
--enable-bootstrap-token-auth 啟用TLS bootstrap功能，后面會講到
--token-auth-file token文件
--service-node-port-range Service Node類型默認分配端口范圍

配置 kube-controller-manager

vi   /opt/kubernetes/cfg/kube-controller-manager

KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \
--v=4 \
--master=127.0.0.1:8080 \
--leader-elect=true \
--address=127.0.0.1 \
--service-cluster-ip-range=10.0.0.0/24 \
--cluster-name=kubernetes \
--cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \
--cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem  \
--root-ca-file=/opt/kubernetes/ssl/ca.pem \
--service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem \
--experimental-cluster-signing-duration=87600h0m0s"

配置schduler

vi /opt/kubernetes/cfg/kube-scheduler 

KUBE_SCHEDULER_OPTS="--logtostderr=true \
--v=4 \
--master=127.0.0.1:8080 \
--leader-elect"

配置系統服務

配置apiserver服務

vim  /usr/lib/systemd/system/kube-apiserver.service

[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
 
[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-apiserver
ExecStart=/opt/kubernetes/bin/kube-apiserver $KUBE_APISERVER_OPTS
Restart=on-failure
 
[Install]
WantedBy=multi-user.target

systemctl restart kube-apiserver
systemctl enable kube-apiserver

配置controller服務

vim  /usr/lib/systemd/system/kube-controller-manager.service

[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
 
[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-controller-manager
ExecStart=/opt/kubernetes/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
 
[Install]
WantedBy=multi-user.target

systemctl restart kube-controller-manager
systemctl enable kube-controller-manager

配置scheduler服務

vim /usr/lib/systemd/system/kube-scheduler.service

[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
 
[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-scheduler
ExecStart=/opt/kubernetes/bin/kube-scheduler $KUBE_SCHEDULER_OPTS
Restart=on-failure
 
[Install]
WantedBy=multi-user.target

systemctl restart kube-scheduler
systemctl enable kube-scheduler

查看集群狀態

ln -s /opt/kubernetes/bin/kubectl /usr/bin/
kubectl get cs

授權kubelet-bootstrap用戶允許請求證書

kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node-bootstrapper \
--user=kubelet-bootstrap

cd /opt/TLS/k8s
vim  admin-csr.json
{
  "CN": "admin",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin

vim  kube-proxy-csr.json
{
  "CN": "system:kube-proxy",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy

cp /root/TLS/k8s/{ca.pem,ca-key.pem,server.pem,server-key.pem} /opt/kubernetes/ssl/

cd /opt/kubernetes/ssl

vim kubeconfig.sh

BOOTSTRAP_TOKEN=0fb61c46f8991b718eb38d27b605b008
APISERVER=$1
SSL_DIR=$2
export KUBE_APISERVER="https://$APISERVER:6443"
kubectl config set-cluster kubernetes \
  --certificate-authority=$SSL_DIR/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=bootstrap.kubeconfig
kubectl config set-credentials kubelet-bootstrap \
  --token=${BOOTSTRAP_TOKEN} \
  --kubeconfig=bootstrap.kubeconfig
kubectl config set-context default \
  --cluster=kubernetes \
  --user=kubelet-bootstrap \
  --kubeconfig=bootstrap.kubeconfig
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig
kubectl config set-cluster kubernetes \
  --certificate-authority=$SSL_DIR/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy \
  --client-certificate=$SSL_DIR/kube-proxy.pem \
  --client-key=$SSL_DIR/kube-proxy-key.pem \
  --embed-certs=true \
  --kubeconfig=kube-proxy.kubeconfig
kubectl config set-context default \
  --cluster=kubernetes \
  --user=kube-proxy \
  --kubeconfig=kube-proxy.kubeconfig
kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig

sh kubeconfig.sh 192.168.162.136 /root/TLS/k8s

相關配置傳遞給node節點

scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.162.137:/opt/kubernetes/cfg/
scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.162.138:/opt/kubernetes/cfg/

部署Node節點

安裝docker

wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo

yum -y install docker-ce-18.06.1.ce-3.el7

systemctl enable docker && systemctl start docker

cat > /etc/docker/daemon.json << EOF
{
  "registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]
}
EOF

cat > /etc/yum.repos.d/kubernetes.repo << EOF
[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

systemctl restart docker

部署flanneld

etcdctl --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.162.136:2379,https://192.168.162.137:2379,https://192.168.162.138:2379" set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'

/opt/etcd/bin/etcdctl --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.162.136:2379,https://192.168.162.137:2379,https://192.168.162.138:2379" get /coreos.com/network/config

https://github.com/coreos/flannel/releases，下載tar.gz包

tar -zxvf flannel-v0.13.0-rc2-linux-amd64.tar.gz
mv flanneld mk-docker-opts.sh  /opt/kubernetes/bin/

vim /opt/kubernetes/cfg/flanneld      #配置flanneld網絡

FLANNEL_OPTIONS="--etcd-endpoints=https://192.168.162.136:2379,https://192.168.162.137:2379,https://192.168.162.138:2379 -etcd-cafile=/opt/etcd/ssl/ca.pem -etcd-certfile=/opt/etcd/ssl/server.pem -etcd-keyfile=/opt/etcd/ssl/server-key.pem"

vim /usr/lib/systemd/system/flanneld.service

Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service
 
[Service]
Type=notify
EnvironmentFile=/opt/kubernetes/cfg/flanneld
ExecStart=/opt/kubernetes/bin/flanneld --ip-masq $FLANNEL_OPTIONS
ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure
 
[Install]
WantedBy=multi-user.target

vim /usr/lib/systemd/system/docker.service   #重新配置docker服務啟動配置文件，整合flanneld網絡，為了讓docker容器能獲取flanneld的網絡環境

[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service
Wants=network-online.target
 
[Service]
Type=notify
EnvironmentFile=/run/flannel/subnet.env
ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TimeoutStartSec=0
Delegate=yes
KillMode=process
Restart=on-failure
StartLimitBurst=3
StartLimitInterval=60s
 
[Install]
WantedBy=multi-user.target　　

systemctl enable flanneld
systemctl restart  flanneld
systemctl restart docker
systemctl enable docker

node節點之間看能否相互ping通

部署kubelet和kube-proxy

部署 kubelet

tar -zxvf kubernetes-server-linux-amd64.tar.gz
mv /root/kubernetes/server/bin/{kubelet,kube-proxy} /opt/kubernetes/bin/

vim /opt/kubernetes/cfg/kubelet

KUBELET_OPTS="--logtostderr=false \
--log-dir=/opt/kubernetes/logs \
--v=4 \
--address=192.168.109.101 \
--hostname-override=192.168.109.101 \
--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \
--experimental-bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \
--config=/opt/kubernetes/cfg/kubelet.config \
--cert-dir=/opt/kubernetes/ssl \
--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"

注意修改ip

vim   /opt/kubernetes/cfg/kubelet.config

kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 192.168.109.101
port: 10250
cgroupDriver: cgroupfs
clusterDNS:
- 10.0.0.2
clusterDomain: cluster.local.
failSwapOn: false

配置kubelet service

vim  /usr/lib/systemd/system/kubelet.service

[Unit]
Description=Kubernetes Kubelet
After=docker.service
Requires=docker.service
 
[Service]
EnvironmentFile=/opt/kubernetes/cfg/kubelet
ExecStart=/opt/kubernetes/bin/kubelet $KUBELET_OPTS
Restart=on-failure
KillMode=process
 
[Install]
WantedBy=multi-user.target

systemctl restart kubelet
systemctl enable kubelet

在k8s-master節點手動允許node節點加入k8s集群；

kubectl get csr

kubectl certificate approve   NAME

部署kube-proxy

vim /opt/kubernetes/cfg/kube-proxy

KUBE_PROXY_OPTS="--logtostderr=false \  #注意兩台node的ip不一樣
--log-dir=/opt/kubernetes/logs \
--v=4 \
--hostname-override=192.168.162.137 \
--cluster-cidr=10.0.0.0/24 \
--proxy-mode=ipvs \
--kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"

vim /usr/lib/systemd/system/kube-proxy.service

[Unit]
Description=Kubernetes Proxy
After=network.target
 
[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-proxy
ExecStart=/opt/kubernetes/bin/kube-proxy $KUBE_PROXY_OPTS
Restart=on-failure
 
[Install]
WantedBy=multi-user.target　

配置kube-proxy.service

systemctl daemon-reload
systemctl enable kube-proxy
systemctl restart kube-proxy

至此全部搭建完畢

測試k8s集群

kubectl run nginx --image=nginx --replicas=3
kubectl expose deployment nginx --port=88 --target-port=80 --type=NodePort
kubectl get svc

訪問：192.168.162.137:45200