Ubuntu二进制部署K8S 1.29.2

jcrose25802025-01-24 18:59

本机说明

本版本非高可用，单Master，以及一个Node

  • 新装的 ubuntu 22.04
  • k8s 1.29.3
  • 使用该文档请使用批量替换 192.168.44.141这个IP，其余照着复制粘贴就可以成功
  • 需要手动 设置一个 固定DNS，我这里设置的是 8.8.8.8不然coredns无法启动

一 基础环境准备

1.1 更换apt镜像源

cat > /etc/apt/sources.list << "eof"
deb http://mirrors.aliyun.com/ubuntu/ jammy main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ jammy-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ jammy-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ jammy-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ jammy-backports main restricted universe multiverse
eof
apt-get update
apt-get -y install lrzsz net-tools gcc net-tools

apt install ipvsadm ipset sysstat conntrack -y

1.2 关闭swap

swapoff -a

# 永久关闭swap
vim /etc/fstab

1.3 其他配置项目

# 关闭防火墙
iptables -P FORWARD ACCEPT
/etc/init.d/ufw stop
ufw disable
# 将桥接的IPv4流量传递到iptables的链
cat <<EOF >  /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward=1
vm.max_map_count=262144
EOF
modprobe br_netfilter
sysctl -p /etc/sysctl.d/k8s.conf
# 使用ipvsadmin
mkdir -p  /etc/sysconfig/modules
cat > /etc/sysconfig/modules/ipvs.modules <<EOF
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
EOF
chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack
# 调整k8s网络配置
cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward         = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF
# Apply sysctl params without reboot
sysctl --system

1.4 配置Ulimit

ulimit -SHn 65535
cat >> /etc/security/limits.conf <<EOF
* soft nofile 655360
* hard nofile 131072
* soft nproc 655350
* hard nproc 655350
* seft memlock unlimited
* hard memlock unlimitedd
EOF

二 CA证书准备

注意，所有的命令执行均在 data/k8s-work

2.1 配置SSL软件

mkdir -p /data/k8s-work     #统一软件的存放位置
cd /data/k8s-work
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*
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

2.2 生成CA文件

cat > ca-csr.json <<"EOF"
{
  "CN": "kubernetes",
  "key": {
      "algo": "rsa",
      "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Sichuan",
      "L": "Chengdu",
      "O": "Jcrose",
      "OU": "CN"
    }
  ],
  "ca": {
          "expiry": "87600h"
  }
}
EOF
2.2.1 创建CA证书
cfssl gencert -initca ca-csr.json | cfssljson -bare ca
2.2.2 配置ca证书策略
cfssl print-defaults config > ca-config.json

cat > ca-config.json <<"EOF"
{
  "signing": {
      "default": {
          "expiry": "87600h"
        },
      "profiles": {
          "kubernetes": {
              "usages": [
                  "signing",
                  "key encipherment",
                  "server auth",
                  "client auth"
              ],
              "expiry": "87600h"
          }
      }
  }
}
EOF

2.3 单机启动ETCD

2.3.1 配置ETCD的证书文件

配置csd.json

cat > etcd-csr.json <<"EOF"
{
  "CN": "etcd",
  "hosts": [
    "127.0.0.1",
    "192.168.44.136"
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [{
    "C": "CN",
    "ST": "Sichuan",
    "L": "Chengdu",
    "O": "Jcrose",
    "OU": "CN"
  }]
}
EOF

创建etcd文件

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes etcd-csr.json | cfssljson  -bare etcd
2.3.2 部署ETCD

下载二进制文件

wget https://github.com/etcd-io/etcd/releases/download/v3.5.2/etcd-v3.5.2-linux-amd64.tar.gz
tar -xvf etcd-v3.5.2-linux-amd64.tar.gz
cp -p etcd-v3.5.2-linux-amd64/etcd* /usr/local/bin/
mkdir /etc/etcd

mkdir -p /etc/etcd/ssl
mkdir -p /var/lib/etcd/default.etcd
cd /data/k8s-work
cp ca*.pem /etc/etcd/ssl
cp etcd*.pem /etc/etcd/ssl

mkdir -p /etc/etcd
mkdir -p /etc/etcd/ssl
mkdir -p /var/lib/etcd/default.etcd

创建配置文件

cat > /etc/etcd/etcd.conf << "eof"
#[Member]
ETCD_NAME="default"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://127.0.0.1:2380"
ETCD_LISTEN_CLIENT_URLS="https://127.0.0.1:2379"
eof

创建启动命令

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

[Service]
Type=notify
EnvironmentFile=-/etc/etcd/etcd.conf
WorkingDirectory=/var/lib/etcd/
ExecStart=/usr/local/bin/etcd \
  --cert-file=/etc/etcd/ssl/etcd.pem \
  --key-file=/etc/etcd/ssl/etcd-key.pem \
  --trusted-ca-file=/etc/etcd/ssl/ca.pem \
  --peer-cert-file=/etc/etcd/ssl/etcd.pem \
  --peer-key-file=/etc/etcd/ssl/etcd-key.pem \
  --peer-trusted-ca-file=/etc/etcd/ssl/ca.pem \
  --advertise-client-urls=https://127.0.0.1:2380 \
  --peer-client-cert-auth \
  --client-cert-auth
Restart=on-failure
RestartSec=5
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable --now etcd.service
systemctl status etcd

检查服务状态

/usr/local/bin/etcdctl --write-out=table --cacert=/etc/etcd/ssl/ca.pem --cert=/etc/etcd/ssl/etcd.pem --key=/etc/etcd/ssl/etcd-key.pem --endpoints=https://127.0.0.1:2379 endpoint health



root@jcrose:/data/k8s-work# /usr/local/bin/etcdctl --write-out=table --cacert=/etc/etcd/ssl/ca.pem --cert=/etc/etcd/ssl/etcd.pem --key=/etc/etcd/ssl/etcd-key.pem --endpoints=https://127.0.0.1:2379 endpoint health
+------------------------+--------+------------+-------+
|        ENDPOINT        | HEALTH |    TOOK    | ERROR |
+------------------------+--------+------------+-------+
| https://127.0.0.1:2379 |   true | 4.006819ms |       |
+------------------------+--------+------------+-------+

三 准备k8s组件

cd /data/k8s-work
tar -xf kubernetes-server-linux-amd64.tar.gz  --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}

3.1 k8s-apiserver

3.1.1 证书文件
mkdir -p /etc/kubernetes/        
mkdir -p /etc/kubernetes/ssl     
mkdir -p /var/log/kubernetes 

cd /data/k8s-work

cat > kube-apiserver-csr.json << "EOF"
{
"CN": "kubernetes",
  "hosts": [
    "127.0.0.1",
    "192.168.44.141",
    "10.96.0.1",
    "kubernetes",
    "kubernetes.default",
    "kubernetes.default.svc",
    "kubernetes.default.svc.cluster",
    "kubernetes.default.svc.cluster.local"
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Sichuan",
      "L": "Chengdu",
      "O": "Jcrose",
      "OU": "CN"
    }
  ]
}
EOF



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

# 生成token文件
cat > token.csv << EOF
$(head -c 16 /dev/urandom | od -An -t x | tr -d ' '),kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF

mkdir -p /etc/kubernetes/        
mkdir -p /etc/kubernetes/ssl     
mkdir -p /var/log/kubernetes 

cd /data/k8s-work

cat > kube-apiserver-csr.json << "EOF"
{
"CN": "kubernetes",
  "hosts": [
    "127.0.0.1",
    "192.168.44.141",
    "10.96.0.1",
    "kubernetes",
    "kubernetes.default",
    "kubernetes.default.svc",
    "kubernetes.default.svc.cluster",
    "kubernetes.default.svc.cluster.local"
  ],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Sichuan",
      "L": "Chengdu",
      "O": "Jcrose",
      "OU": "CN"
    }
  ]
}
EOF



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

# 生成token文件
cat > token.csv << EOF
$(head -c 16 /dev/urandom | od -An -t x | tr -d ' '),kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF
3.1.2 复制证书文件
cp ca.pem ca-key.pem kube-apiserver.pem kube-apiserver-key.pem token.csv /etc/kubernetes/ssl/
3.1.3 开启API聚合功能
cat > kube-metrics-csr.json << "eof"
{
  "CN": "aggregator",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Sichuan",
      "L": "Chengdu",
      "O": "system:masters",
      "OU": "CN"
    }
  ]
}
eof

cfssl gencert   -profile=kubernetes   -ca=/etc/kubernetes/ssl/ca.pem   -ca-key=/etc/kubernetes/ssl/ca-key.pem   kube-metrics-csr.json | cfssljson -bare kube-metrics
cp kube-metrics*.pem /etc/kubernetes/ssl/

cat > kube-metrics-csr.json << "eof"
{
  "CN": "aggregator",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Sichuan",
      "L": "Chengdu",
      "O": "system:masters",
      "OU": "CN"
    }
  ]
}
eof

cfssl gencert   -profile=kubernetes   -ca=/etc/kubernetes/ssl/ca.pem   -ca-key=/etc/kubernetes/ssl/ca-key.pem   kube-metrics-csr.json | cfssljson -bare kube-metrics
cp kube-metrics*.pem /etc/kubernetes/ssl/
3.1.4 创建apiserver服务配置文件
cat > /etc/kubernetes/kube-apiserver.conf << "EOF"
KUBE_APISERVER_OPTS="--anonymous-auth=true \
  --v=2 \
  --allow-privileged=true \
  --bind-address=0.0.0.0 \
  --secure-port=6443 \
  --advertise-address=192.168.44.141 \
  --service-cluster-ip-range=10.96.0.0/12,fd00:1111::/112 \
  --service-node-port-range=80-32767 \
  --etcd-servers=https://127.0.0.1:2379 \
  --etcd-cafile=/etc/etcd/ssl/ca.pem \
  --etcd-certfile=/etc/etcd/ssl/etcd.pem \
  --etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
  --client-ca-file=/etc/kubernetes/ssl/ca.pem \
  --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem  \
  --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem \
  --proxy-client-cert-file=/etc/kubernetes/ssl/kube-metrics.pem \
  --proxy-client-key-file=/etc/kubernetes/ssl/kube-metrics-key.pem \
  --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem \
  --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem \
  --service-account-key-file=/etc/kubernetes/ssl/ca-key.pem \
  --service-account-signing-key-file=/etc/kubernetes/ssl/ca-key.pem  \
  --service-account-issuer=https://kubernetes.default.svc.cluster.local \
  --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
  --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota  \
  --authorization-mode=Node,RBAC \
  --runtime-config=api/all=true \
  --enable-bootstrap-token-auth \
  --token-auth-file=/etc/kubernetes/ssl/token.csv \
  --requestheader-allowed-names=aggregator  \
  --requestheader-group-headers=X-Remote-Group  \
  --requestheader-extra-headers-prefix=X-Remote-Extra-  \
  --requestheader-username-headers=X-Remote-User \
  --enable-aggregator-routing=true"
EOF  

cat > /etc/kubernetes/kube-apiserver.conf << "EOF"
KUBE_APISERVER_OPTS="--anonymous-auth=true \
  --v=2 \
  --allow-privileged=true \
  --bind-address=0.0.0.0 \
  --secure-port=6443 \
  --advertise-address=192.168.44.141 \
  --service-cluster-ip-range=10.96.0.0/12,fd00:1111::/112 \
  --service-node-port-range=80-32767 \
  --etcd-servers=https://127.0.0.1:2379 \
  --etcd-cafile=/etc/etcd/ssl/ca.pem \
  --etcd-certfile=/etc/etcd/ssl/etcd.pem \
  --etcd-keyfile=/etc/etcd/ssl/etcd-key.pem \
  --client-ca-file=/etc/kubernetes/ssl/ca.pem \
  --tls-cert-file=/etc/kubernetes/ssl/kube-apiserver.pem  \
  --tls-private-key-file=/etc/kubernetes/ssl/kube-apiserver-key.pem \
  --proxy-client-cert-file=/etc/kubernetes/ssl/kube-metrics.pem \
  --proxy-client-key-file=/etc/kubernetes/ssl/kube-metrics-key.pem \
  --kubelet-client-certificate=/etc/kubernetes/ssl/kube-apiserver.pem \
  --kubelet-client-key=/etc/kubernetes/ssl/kube-apiserver-key.pem \
  --service-account-key-file=/etc/kubernetes/ssl/ca-key.pem \
  --service-account-signing-key-file=/etc/kubernetes/ssl/ca-key.pem  \
  --service-account-issuer=https://kubernetes.default.svc.cluster.local \
  --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname \
  --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota  \
  --authorization-mode=Node,RBAC \
  --runtime-config=api/all=true \
  --enable-bootstrap-token-auth \
  --token-auth-file=/etc/kubernetes/ssl/token.csv \
  --requestheader-allowed-names=aggregator  \
  --requestheader-group-headers=X-Remote-Group  \
  --requestheader-extra-headers-prefix=X-Remote-Extra-  \
  --requestheader-username-headers=X-Remote-User \
  --enable-aggregator-routing=true"
EOF
3.1.5 创建apiserver服务管理配置文件
cat > /etc/systemd/system/kube-apiserver.service << "EOF"
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
After=etcd.service
Wants=etcd.service

[Service]
EnvironmentFile=-/etc/kubernetes/kube-apiserver.conf
ExecStart=/usr/local/bin/kube-apiserver $KUBE_APISERVER_OPTS
Restart=on-failure
RestartSec=5
Type=notify
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF
3.1.6 启动api-server
cp ca*.pem /etc/kubernetes/ssl/
cp kube-apiserver*.pem /etc/kubernetes/ssl/
cp token.csv /etc/kubernetes/

systemctl daemon-reload
systemctl enable --now kube-apiserver

systemctl status kube-apiserver

# 测试
curl --insecure https://192.168.44.141:6443/

3.2 kubectl

3.2.1 证书文件
cat > admin-csr.json << "EOF"
{
  "CN": "admin",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Sichuan",
      "L": "Chengdu",
      "O": "system:masters",             
      "OU": "system"
    }
  ]
}
EOF



cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin
cp admin*.pem /etc/kubernetes/ssl/
3.2.2 创建RBAC
kubectl config set-cluster kubernetes --certificate-authority=ca.pem --embed-certs=true --server=https://192.168.44.141:6443 --kubeconfig=kube.config
kubectl config set-credentials admin --client-certificate=admin.pem --client-key=admin-key.pem --embed-certs=true --kubeconfig=kube.config
kubectl config set-context kubernetes --cluster=kubernetes --user=admin --kubeconfig=kube.config
kubectl config use-context kubernetes --kubeconfig=kube.config

mkdir ~/.kube
cp kube.config ~/.kube/config

# 准备kubectl配置文件并进行角色绑定


kubectl create clusterrolebinding kube-apiserver:kubelet-apis --clusterrole=system:kubelet-api-admin --user kubernetes --kubeconfig=/root/.kube/config

3.2 kube-controller-manager

3.2.1 证书文件
cat > kube-controller-manager-csr.json << "EOF"
{
    "CN": "system:kube-controller-manager",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "hosts": [
      "127.0.0.1",
      "192.168.44.141"
    ],
    "names": [
      {
        "C": "CN",
        "ST": "Sichuan",
        "L": "Chengdu",
        "O": "system:kube-controller-manager",
        "OU": "system"
      }
    ]
}
EOF
3.2.2 创建RBAC
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-controller-manager-csr.json | cfssljson -bare kube-controller-manager

kubectl config set-cluster kubernetes --certificate-authority=ca.pem --embed-certs=true --server=https://192.168.44.141:6443 --kubeconfig=kube-controller-manager.kubeconfig

kubectl config set-credentials system:kube-controller-manager --client-certificate=kube-controller-manager.pem --client-key=kube-controller-manager-key.pem --embed-certs=true --kubeconfig=kube-controller-manager.kubeconfig

kubectl config set-context system:kube-controller-manager --cluster=kubernetes --user=system:kube-controller-manager --kubeconfig=kube-controller-manager.kubeconfig

kubectl config use-context system:kube-controller-manager --kubeconfig=kube-controller-manager.kubeconfig

cp kube-controller-manager*.pem /etc/kubernetes/ssl/
cp kube-controller-manager.kubeconfig /etc/kubernetes/
3.2.3 创建kube-controller-manager配置文件
cat > kube-controller-manager.conf << "EOF"
KUBE_CONTROLLER_MANAGER_OPTS="--v=2 \
     --bind-address=127.0.0.1 \
     --root-ca-file=/etc/kubernetes/ssl/ca.pem \
     --cluster-signing-cert-file=/etc/kubernetes/ssl/ca.pem \
     --cluster-signing-key-file=/etc/kubernetes/ssl/ca-key.pem \
     --service-account-private-key-file=/etc/kubernetes/ssl/ca-key.pem \
     --kubeconfig=/etc/kubernetes/kube-controller-manager.kubeconfig \
     --leader-elect=true \
     --use-service-account-credentials=true \
     --node-monitor-grace-period=40s \
     --node-monitor-period=5s \
     --controllers=*,bootstrapsigner,tokencleaner \
     --allocate-node-cidrs=true \
     --service-cluster-ip-range=10.96.0.0/12,fd00:1111::/112 \
     --cluster-cidr=172.16.0.0/12,fc00:2222::/112 \
     --node-cidr-mask-size-ipv4=24 \
     --node-cidr-mask-size-ipv6=120" 
EOF
3.2.4 创建服务启动文件
cat > kube-controller-manager.service << "EOF"
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=-/etc/kubernetes/kube-controller-manager.conf
ExecStart=/usr/local/bin/kube-controller-manager $KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target
EOF
3.2.5 复制配置文件
cp kube-controller-manager*.pem /etc/kubernetes/ssl/
cp kube-controller-manager.kubeconfig /etc/kubernetes/
cp kube-controller-manager.conf /etc/kubernetes/
cp kube-controller-manager.service /usr/lib/systemd/system/
3.2.6 启动服务
systemctl daemon-reload 
systemctl enable --now kube-controller-manager
systemctl status kube-controller-manager

3.3 kube-scheduler

3.3.1 证书文件
cat > kube-scheduler-csr.json << "EOF"
{
    "CN": "system:kube-scheduler",
    "hosts": [
      "127.0.0.1",
      "192.168.44.141"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
      {
        "C": "CN",
        "ST": "Sichuan",
        "L": "Chengdu",
        "O": "system:kube-scheduler",
        "OU": "system"
      }
    ]
}
EOF



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

kubectl config set-cluster kubernetes --certificate-authority=ca.pem --embed-certs=true --server=https://192.168.44.141:6443 --kubeconfig=kube-scheduler.kubeconfig

kubectl config set-credentials system:kube-scheduler --client-certificate=kube-scheduler.pem --client-key=kube-scheduler-key.pem --embed-certs=true --kubeconfig=kube-scheduler.kubeconfig

kubectl config set-context system:kube-scheduler --cluster=kubernetes --user=system:kube-scheduler --kubeconfig=kube-scheduler.kubeconfig

kubectl config use-context system:kube-scheduler --kubeconfig=kube-scheduler.kubeconfig

cp kube-scheduler*.pem /etc/kubernetes/ssl/
cp kube-scheduler.kubeconfig /etc/kubernetes/
3.3.2 创建服务配置文件
cat > kube-scheduler.conf << "EOF"
KUBE_SCHEDULER_OPTS="--kubeconfig=/etc/kubernetes/kube-scheduler.kubeconfig --leader-elect=true --v=2"
EOF
3.3.3 创建服务启动文件
cat > kube-scheduler.service << "EOF"
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=-/etc/kubernetes/kube-scheduler.conf
ExecStart=/usr/local/bin/kube-scheduler $KUBE_SCHEDULER_OPTS
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target
EOF
3.3.4 复制服务启动文件
cp kube-scheduler*.pem /etc/kubernetes/ssl/
cp kube-scheduler.kubeconfig /etc/kubernetes/
cp kube-scheduler.conf /etc/kubernetes/
cp kube-scheduler.service /usr/lib/systemd/system/
3.3.5 启动服务
systemctl daemon-reload
systemctl enable --now kube-scheduler
systemctl status kube-scheduler

3.4 Containerd

3.4.1 下载软件包containerd
wget https://ghproxy.com/https://github.com/containerd/containerd/releases/download/v1.6.10/cri-containerd-cni-1.6.10-linux-amd64.tar.gz
wget https://ghproxy.com/https://github.com/containernetworking/plugins/releases/download/v1.1.1/cni-plugins-linux-amd64-v1.1.1.tgz
wget https://ghproxy.com/https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.26.0/crictl-v1.26.0-linux-amd64.tar.gz

#创建cni插件所需目录
mkdir -p /etc/cni/net.d /opt/cni/bin 
#解压cni二进制包
tar xf cni-plugins-linux-amd64-v*.tgz -C /opt/cni/bin/

#解压
tar -xzf cri-containerd-cni-*-linux-amd64.tar.gz -C /

#创建服务启动文件
cat > /etc/systemd/system/containerd.service <<EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target

[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/local/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=infinity
TasksMax=infinity
OOMScoreAdjust=-999

[Install]
WantedBy=multi-user.target
EOF
3.4.2 配置Containerd所需的模块
cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF
 
#加载模块
systemctl restart systemd-modules-load.service
3.4.3 创建Containerd的配置文件
# 创建默认配置文件
mkdir -p /etc/containerd
containerd config default | tee /etc/containerd/config.toml

# 修改Containerd的配置文件
sed -i "s#SystemdCgroup\ \=\ false#SystemdCgroup\ \=\ true#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep SystemdCgroup

sed -i "s#registry.k8s.io#registry.cn-hangzhou.aliyuncs.com/chenby#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep sandbox_image

sed -i "s#config_path\ \=\ \"\"#config_path\ \=\ \"/etc/containerd/certs.d\"#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep certs.d

mkdir /etc/containerd/certs.d/docker.io -pv

cat > /etc/containerd/certs.d/docker.io/hosts.toml << EOF
server = "https://docker.io"
[host."https://dockerpull.cn"]
  capabilities = ["pull", "resolve"]
EOF
3.4.4 设置服务为开机自动
systemctl daemon-reload
systemctl enable --now containerd
systemctl restart containerd
3.4.5 配置crictl客户端连接的运行时位置
tar xf crictl-v*-linux-amd64.tar.gz -C /usr/bin/
#生成配置文件
cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF

#测试
systemctl restart  containerd
crictl info

3.5 Kubelet

主要用于k8s-apiserver与 节点node进行交互

3.5.1 创建配置文件

创建kubelet-bootstrap.kubeconfig

BOOTSTRAP_TOKEN=$(awk -F "," '{print $1}' /etc/kubernetes/ssl/token.csv)

kubectl config set-cluster kubernetes     \
--certificate-authority=/etc/kubernetes/ssl/ca.pem     \
--embed-certs=true     --server=https://192.168.44.141:6443     \
--kubeconfig=kubelet-bootstrap.kubeconfig

kubectl config set-credentials tls-bootstrap-token-user     \
--token=${BOOTSTRAP_TOKEN} \
--kubeconfig=kubelet-bootstrap.kubeconfig

kubectl config set-context tls-bootstrap-token-user@kubernetes     \
--cluster=kubernetes     \
--user=tls-bootstrap-token-user     \
--kubeconfig=kubelet-bootstrap.kubeconfig

kubectl config use-context tls-bootstrap-token-user@kubernetes     \
--kubeconfig=kubelet-bootstrap.kubeconfig


cp kubelet-bootstrap.kubeconfig /etc/kubernetes
3.5.2 创建kubelet.json文件
cat > kubelet.json << "EOF"
{
  "kind": "KubeletConfiguration",
  "apiVersion": "kubelet.config.k8s.io/v1beta1",
  "authentication": {
    "x509": {
      "clientCAFile": "/etc/kubernetes/ssl/ca.pem"
    },
    "webhook": {
      "enabled": true,
      "cacheTTL": "2m0s"
    },
    "anonymous": {
      "enabled": false
    }
  },
  "authorization": {
    "mode": "Webhook",
    "webhook": {
      "cacheAuthorizedTTL": "5m0s",
      "cacheUnauthorizedTTL": "30s"
    }
  },
  "address": "192.168.44.141",
  "port": 10250,
  "readOnlyPort": 10255,
  "cgroupDriver": "systemd",                    
  "hairpinMode": "promiscuous-bridge",
  "serializeImagePulls": false,
  "clusterDomain": "cluster.local.",
  "clusterDNS": ["10.96.0.2"]
}
EOF

# 同步文件到集群节点
cp kubelet-bootstrap.kubeconfig /etc/kubernetes/
cp kubelet.json /etc/kubernetes/
3.2.4 创建kubelet服务启动管理文件
cat > kubelet.service << "EOF"
[Unit]
Description=Kubernetes Kubelet
Documentation=https://github.com/kubernetes/kubernetes
After=containerd.service
Requires=containerd.service

[Service]
WorkingDirectory=/var/lib/kubelet
ExecStart=/usr/local/bin/kubelet \
    --bootstrap-kubeconfig=/etc/kubernetes/kubelet-bootstrap.kubeconfig \
    --kubeconfig=/root/.kube/config \
    --config=/etc/kubernetes/kubelet.json \
    --container-runtime-endpoint=unix:///run/containerd/containerd.sock  \
    --node-labels=node.kubernetes.io/node=
Restart=on-failure
RestartSec=5

[Install]
WantedBy=multi-user.target
EOF
3.2.5 复制配置文件
cp kubelet-bootstrap.kubeconfig /etc/kubernetes/
cp kubelet.json /etc/kubernetes/
cp kubelet.service /usr/lib/systemd/system/
3.2.6 创建启动文件
systemctl daemon-reload
systemctl enable --now kubelet

systemctl status kubelet

3.6 kube-proxy

3.6.1 创建kube-proxy配置文件
cat > kube-proxy-csr.json << "EOF"
{
  "CN": "system:kube-proxy",
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "ST": "Sichuan",
      "L": "Chengdu",
      "O": "Jcrose",
      "OU": "CN"
    }
  ]
}
EOF
3.6.2 生成证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
kubectl config set-cluster kubernetes --certificate-authority=ca.pem --embed-certs=true --server=https://192.168.44.141:6443 --kubeconfig=kube-proxy.kubeconfig


kubectl config set-credentials kube-proxy  \
  --client-certificate=kube-proxy.pem     \
  --client-key=kube-proxy-key.pem     \
  --embed-certs=true     \
  --kubeconfig=kube-proxy.kubeconfig

kubectl config set-context kube-proxy@kubernetes    \
  --cluster=kubernetes     \
  --user=kube-proxy     \
  --kubeconfig=kube-proxy.kubeconfig

kubectl config use-context kube-proxy@kubernetes  --kubeconfig=kube-proxy.kubeconfig
3.3.3 创建配置文件
cat > kube-proxy.yaml << EOF
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
clientConnection:
  acceptContentTypes: ""
  burst: 10
  contentType: application/vnd.kubernetes.protobuf
  kubeconfig: /etc/kubernetes/kube-proxy.kubeconfig
  qps: 5
clusterCIDR: 172.16.0.0/12,fc00:2222::/112
configSyncPeriod: 15m0s
conntrack:
  max: null
  maxPerCore: 32768
  min: 131072
  tcpCloseWaitTimeout: 1h0m0s
  tcpEstablishedTimeout: 24h0m0s
enableProfiling: false
healthzBindAddress: 0.0.0.0:10256
hostnameOverride: ""
iptables:
  masqueradeAll: false
  masqueradeBit: 14
  minSyncPeriod: 0s
  syncPeriod: 30s
ipvs:
  masqueradeAll: true
  minSyncPeriod: 5s
  scheduler: "rr"
  syncPeriod: 30s
kind: KubeProxyConfiguration
metricsBindAddress: 127.0.0.1:10249
mode: "ipvs"
nodePortAddresses: null
oomScoreAdj: -999
portRange: ""
udpIdleTimeout: 250ms
EOF
3.3.4 创建服务启动管理文件
cat >  kube-proxy.service << "EOF"
[Unit]
Description=Kubernetes Kube-Proxy Server
Documentation=https://github.com/kubernetes/kubernetes
After=network.target

[Service]
WorkingDirectory=/var/lib/kube-proxy
ExecStart=/usr/local/bin/kube-proxy \
	--config=/etc/kubernetes/kube-proxy.yaml \
	--v=2
Restart=on-failure
RestartSec=5
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF
3.3.5 移动配置文件
cp kube-proxy*.pem /etc/kubernetes/ssl/
cp kube-proxy.kubeconfig kube-proxy.yaml /etc/kubernetes/
cp kube-proxy.service /usr/lib/systemd/system/
mkdir -p /var/lib/kube-proxy
3.3.6 启动
systemctl daemon-reload
systemctl enable --now kube-proxy

systemctl status kube-proxy

四 安装K8S内部的服务

4.1 安装 Kubens Tab补全

tab补全

apt install bash-completion
source <(kubectl completion bash)
echo 'source <(kubectl completion bash)' >> ~/.bashrc source ~/.bashrc

安装jq yq

wget https://mirror.ghproxy.com/https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64 -O /usr/bin/yq &&    chmod +x /usr/bin/yq
wget https://mirror.ghproxy.com/https://github.com/stedolan/jq/releases/download/jq-1.6/jq-linux64 -O /usr/bin/jq && chmod +x /usr/bin/jq

kubens

wget https://mirror.ghproxy.com/https://github.com/ahmetb/kubectx/releases/download/v0.9.5/kubens
chmod +x kubens && mv kubens /usr/local/sbin

4.2 网络组件部署 Calico

wget  https://mirror.ghproxy.com/https://raw.githubusercontent.com/projectcalico/calico/v3.25.0/manifests/calico.yaml
sed -i 's#192.168.0.0/16#10.244.0.0/16#' calico.yaml

五 Node节点加入K8S

Master节点操作

添加 /etc/hosts

192.168.44.142 k8s-master02

配置免密登录

ssh-keygen		#一直按回车键就可以了
ssh-copy-id root@192.168.44.142

5.1 Node节点操作-Containerd

重复上面的 一 基础环境准备的步骤

5.1.1 下载软件包containerd
wget https://ghproxy.com/https://github.com/containerd/containerd/releases/download/v1.6.10/cri-containerd-cni-1.6.10-linux-amd64.tar.gz
wget https://ghproxy.com/https://github.com/containernetworking/plugins/releases/download/v1.1.1/cni-plugins-linux-amd64-v1.1.1.tgz
wget https://ghproxy.com/https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.26.0/crictl-v1.26.0-linux-amd64.tar.gz

#创建cni插件所需目录
mkdir -p /etc/cni/net.d /opt/cni/bin 
#解压cni二进制包
tar xf cni-plugins-linux-amd64-v*.tgz -C /opt/cni/bin/

#解压
tar -xzf cri-containerd-cni-*-linux-amd64.tar.gz -C /

#创建服务启动文件
cat > /etc/systemd/system/containerd.service <<EOF
[Unit]
Description=containerd container runtime
Documentation=https://containerd.io
After=network.target local-fs.target

[Service]
ExecStartPre=-/sbin/modprobe overlay
ExecStart=/usr/local/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=infinity
TasksMax=infinity
OOMScoreAdjust=-999

[Install]
WantedBy=multi-user.target
EOF
5.1.2 配置Containerd所需的模块
cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF
 
#加载模块
systemctl restart systemd-modules-load.service
5.1.3 创建Containerd的配置文件
# 创建默认配置文件
mkdir -p /etc/containerd
containerd config default | tee /etc/containerd/config.toml

# 修改Containerd的配置文件
sed -i "s#SystemdCgroup\ \=\ false#SystemdCgroup\ \=\ true#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep SystemdCgroup

sed -i "s#registry.k8s.io#registry.cn-hangzhou.aliyuncs.com/chenby#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep sandbox_image

sed -i "s#config_path\ \=\ \"\"#config_path\ \=\ \"/etc/containerd/certs.d\"#g" /etc/containerd/config.toml
cat /etc/containerd/config.toml | grep certs.d

mkdir /etc/containerd/certs.d/docker.io -pv

cat > /etc/containerd/certs.d/docker.io/hosts.toml << EOF
server = "https://docker.io"
[host."https://dockerpull.cn"]
  capabilities = ["pull", "resolve"]
EOF
5.1.4 设置服务为开机自动
systemctl daemon-reload
systemctl enable --now containerd
systemctl restart containerd
5.1.5 配置crictl客户端连接的运行时位置
tar xf crictl-v*-linux-amd64.tar.gz -C /usr/bin/
#生成配置文件
cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF

#测试
systemctl restart  containerd
crictl info

5.2 Master节点操作-Kubelet

k8s-master01操作

说明：
kubelet.json中address需要修改为当前主机IP地址。

for i in  k8s-master02 ;do scp kubelet-bootstrap.kubeconfig kubelet.json $i:/etc/kubernetes/;done

for i in  k8s-master02 ;do scp ca.pem $i:/etc/kubernetes/ssl/;done

for i in  k8s-master02 ;do scp kubelet.service $i:/usr/lib/systemd/system/;done

mkdir -p /var/lib/kubelet
mkdir -p /var/log/kubernetes

systemctl daemon-reload
systemctl enable --now kubelet

systemctl status kubelet

5.3 Kube-proxy

for i in k8s-master02 ;do scp kube-proxy.kubeconfig kube-proxy.yaml $i:/etc/kubernetes/;done
for i in k8s-master02 ;do scp  kube-proxy.service $i:/usr/lib/systemd/system/;done

mkdir -p /var/lib/kube-proxy
systemctl daemon-reload
systemctl enable --now kube-proxy

systemctl status kube-proxy

六 检验集群节点状态

root@master:~# kubectl get node
NAME        STATUS   ROLES    AGE   VERSION
k8s-slave   Ready    <none>   21h   v1.29.2
master      Ready    <none>   25h   v1.29.2
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