k8s1.27.2版本二进制高可用集群部署

发布时间：2024年01月22日

环境

说明：本次实验共有5台主机，3台master节点同时又是worker，os128、os129、os130 节点主机容器运行时用的containerd，worker131、worker132主机的用的docker

主机名	IP	组件	系统
os128	192.168.177.128	etcd、kube-apiserver、kube-controller-manager、kube-scheduler、kubelet、kube-proxy、containerd	CentOS7.9
os129	192.168.177.129	etcd、kube-apiserver、kube-controller-manager、kube-scheduler、kubelet、kube-proxy、containerd	CentOS7.9
os130	192.168.177.130	etcd、kube-apiserver、kube-controller-manager、kube-scheduler、kubelet、kube-proxy、containerd	CentOS7.9
worker131	192.168.177.131	haproxy、keepalived、kubelet、kube-proxy、docker、cri-dockerd	CentOS7.9
worker132	192.168.177.132	haproxy、keepalived、kubelet、kube-proxy、docker、cri-dockerd	CentOS7.9
VIP	192.168.177.127

软件版本

软件版本明细

软件	版本	下载地址	备注
CentOS	7.9.2009	https://mirrors.aliyun.com/centos/7.9.2009/isos/x86_64/CentOS-7-x86_64-Minimal-2009.iso
kernel	3.10.0-1160.105.1.el7.x86_64(系统默认)
kube-apiserver,kube-controller-manager,kube-schedule,kubelet,kube-proxy	v1.27.2	https://dl.k8s.io/v1.27.2/kubernetes-server-linux-amd64.tar.gz
etcd	v3.5.5	https://github.com/etcd-io/etcd/releases/download/v3.5.5/etcd-v3.5.5-linux-amd64.tar.gz
cfssl	v1.6.1	https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl_1.6.1_linux_amd64
cfssljson	v1.6.1	https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssljson_1.6.1_linux_amd64
cfssl-certinfo	v1.6.1	https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl-certinfo_1.6.1_linux_amd64
containerd	v.1.6.6	https://github.com/containerd/containerd/releases/download/v1.6.6/cri-containerd-cni-1.6.6-linux-amd64.tar.gz
runc	v1.1.11	https://github.com/opencontainers/runc/releases/download/v1.1.11/runc.amd64	containerd中自带的runc有问题需要替换
docker	20.10.24.	https://download.docker.com/linux/static/stable/x86_64/docker-20.10.24.tgz
cri-dockerd	0.3.6	https://github.com/Mirantis/cri-dockerd/releases/download/v0.3.6/cri-dockerd-0.3.6.amd64.tgz
crictl	v1.29.0	https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.29.0/crictl-v1.29.0-linux-amd64.tar.gz	使用docker作为runtime时，需要单独安装这个管理工具，containerd的安装包中自带了此工具
haproxy	1.5	系统默认yum源
keepalived	1.3.5	系统默认yum源
calico	v3.25.0	https://docs.tigera.io/archive/v3.25/manifests/calico.yaml
coredns	v1.11.1	https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/dns/coredns/coredns.yaml.base
dashboard	v2.7	https://raw.githubusercontent.com/kubernetes/dashboard/v2.7.0/aio/deploy/recommended.yaml
metrics-server	0.6.1	https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.6.1/components.yaml

服务器系统初始化

# 安装依赖包
yum -y install  epel-release.noarch
yum update  -y
yum -y install wget jq psmisc vim net-tools nfs-utils telnet yum-utils device-mapper-persistent-data lvm2 git network-scripts tar curl  bash-completion  lrzsz  sysstat openssh-clients -y
# 关闭防火墙 与selinux 和ssh优化
 systemctl stop firewalld
 systemctl disable firewalld
 yum install iptables* -y
 setenforce 0
 sed -i 's/^SELINUX=enforcing/SELINUX=disabled/g' /etc/sysconfig/selinux
 sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
 sed -i '/^#UseDNS/s/#UseDNS yes/UseDNS no/g' /etc/ssh/sshd_config
 sed -i 's/#PermitEmptyPasswords no/PermitEmptyPasswords no/g' /etc/ssh/sshd_config 
 sed -i 's/^GSSAPIAuthentication yes/GSSAPIAuthentication no/g' /etc/ssh/sshd_config
 systemctl restart sshd
# 关闭交换分区
sed -ri 's/.*swap.*/#&/' /etc/fstab
swapoff -a && sysctl -w vm.swappiness=0
 
# 配置系统句柄数
ulimit -SHn 655350
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
cat >> /etc/security/limits.d/20-nproc.conf << EOF
*  soft    nproc     unlimited
*  hard    nproc     unlimited
EOF

# 主机ipvs管理工具安装及模块加载
yum -y install ipvsadm ipset sysstat conntrack libseccomp
cat > /etc/sysconfig/modules/ipvs.modules <<EOF
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack
EOF
# 授权、运行、检查是否加载
chmod 755 /etc/sysconfig/modules/ipvs.modules && bash /etc/sysconfig/modules/ipvs.modules && lsmod | grep -e ip_vs -e nf_conntrack
#内核优化k8s.conf
cat <<EOF > /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward = 1
vm.swappiness = 0
fs.may_detach_mounts = 1
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_watches=89100
fs.file-max=52706963
fs.nr_open=52706963
net.netfilter.nf_conntrack_max=2310720

net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl =15
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.ip_conntrack_max = 131072
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_timestamps = 0
net.core.somaxconn = 16384
EOF
#设置生效
sysctl --system
#加载br_netfilter
modprobe br_netfilter
#查看是否加载
lsmod | grep br_netfilter

设置关于etcd签名证书

准备签名证书需要的工具 cfssl、cfssljson、cfssl-certinfo(选择一台主机即可，此次证书相关的都在os128上操作)

    wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl_1.6.1_linux_amd64
	wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssljson_1.6.1_linux_amd64
	wget https://github.com/cloudflare/cfssl/releases/download/v1.6.1/cfssl-certinfo_1.6.1_linux_amd64
	
	mv cfssl_1.6.1_linux_amd64  /usr/bin/cfssl
	mv cfssljson_1.6.1_linux_amd64 /usr/bin/cfssljson
	mv cfssl-certinfo_1.6.1_linux_amd64 /usr/bin/cfssl-certinfo
	chmod +x /usr/bin/cfssl*

自签etcd 的CA

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

cd ~/TLS/etcd
#自签CA：
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
{
    "CA": {"expiry": "87600h"},
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}
EOF

#生成证书：
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

会生成ca.pem和ca-key.pem文件

使用自签CA签发Etcd HTTPS证书


#创建证书申请文件：
cd ~/TLS/etcd
cat > server-csr.json << EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.177.128",
    "192.168.177.129",
    "192.168.177.130"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}
EOF

#注：上述文件hosts字段中IP为所有etcd节点的集群内部通信IP，一个都不能少！为了方便后期扩容可以多写几个预留的IP。
#生成证书：
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server

#会生成server.pem和server-key.pem文件。

etcd集群部署

Etcd 的概念：
Etcd 是一个分布式键值存储系统，Kubernetes使用Etcd进行数据存储，所以先准备一个Etcd数据库，为解决Etcd单点故障，应采用集群方式部署，这里使用3台组建集群，可容忍1台机器故障，当然，你也可以使用5台组建集群，可容忍2台机器故障。
以下在节点os128上操作，为简化操作，待会将节点os128生成的所有文件拷贝到节点os129和节点os130

# 准备etcd的安装包
wget  https://github.com/etcd-io/etcd/releases/download/v3.5.5/etcd-v3.5.5-linux-amd64.tar.gz 

mkdir -pv /opt/etcd/{bin,cfg,ssl}
tar zxvf etcd-v3.5.5-linux-amd64.tar.gz
mv etcd-v3.5.5-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/

准备etcd的配置文件

#os128主机 etcd 配置文件
cat > /opt/etcd/cfg/etcd.conf << EOF
#[Member]
ETCD_NAME="etcd-1"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.177.128:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.177.128:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.177.128:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.177.128:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.177.128:2380,etcd-2=https://192.168.177.129:2380,etcd-3=https://192.168.177.130:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF
---
ETCD_NAME：节点名称，集群中唯一
ETCD_DATA_DIR：数据目录
ETCD_LISTEN_PEER_URLS：集群通信监听地址
ETCD_LISTEN_CLIENT_URLS：客户端访问监听地址
ETCD_INITIAL_ADVERTISE_PEER_URLS：集群通告地址
ETCD_ADVERTISE_CLIENT_URLS：客户端通告地址
ETCD_INITIAL_CLUSTER：集群节点地址
ETCD_INITIAL_CLUSTER_TOKEN：集群Token
ETCD_INITIAL_CLUSTER_STATE：加入集群的当前状态，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.conf
ExecStart=/opt/etcd/bin/etcd \
--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 \
--logger=zap
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

安装etcd集群

#拷贝刚才生成的证书
#把刚才生成的证书拷贝到配置文件中的路径：
cp ~/TLS/etcd/ca*pem ~/TLS/etcd/server*pem /opt/etcd/ssl/

# 同步所有主机
scp -r /opt/etcd/ root@192.168.177.129:/opt/
scp -r /opt/etcd/ root@192.168.177.130:/opt/
scp /usr/lib/systemd/system/etcd.service root@192.168.177.129:/usr/lib/systemd/system/
scp /usr/lib/systemd/system/etcd.service root@192.168.177.130:/usr/lib/systemd/system/

# os129 主机etcd的配置文件
cat > /opt/etcd/cfg/etcd.conf << EOF
#[Member]
ETCD_NAME="etcd-2"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.177.129:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.177.129:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.177.129:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.177.129:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.177.128:2380,etcd-2=https://192.168.177.129:2380,etcd-3=https://192.168.177.130:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

# os130主机etcd配置文件
cat > /opt/etcd/cfg/etcd.conf << EOF
#[Member]
ETCD_NAME="etcd-3"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.177.130:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.177.130:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.177.130:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.177.130:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.177.128:2380,etcd-2=https://192.168.177.129:2380,etcd-3=https://192.168.177.130:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

启动etcd并设置开启自启

启动etcd:
systemctl daemon-reload
systemctl start etcd
systemctl enable etcd

使用etcdctl验证etcd集群

 ETCDCTL_API=3 /opt/etcd/bin/etcdctl --cacert=/opt/etcd/ssl/ca.pem --cert=/opt/etcd/ssl/server.pem --key=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.177.128:2379,https://192.168.177.129:2379,https://192.168.177.130:2379" endpoint health --write-out=table

在这里插入图片描述

负载均衡器组件安装

worker131、worker132主机上执行

安装haproxy、keepalived

 yum install haproxy keepalived -y

haproxy 配置

cat > /etc/haproxy/haproxy.cfg <<EOF
global
    log         127.0.0.1 local2
    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     6000
    user        haproxy
    group       haproxy
    daemon
    stats socket /var/lib/haproxy/stats
#---------------------------------------------------------------------
defaults
    mode                    tcp
    log                     global
    option                  tcplog
    option                  dontlognull
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000
#---------------------------------------------------------------------
listen stats
    bind 0.0.0.0:9100
    mode  http
    option httplog
    stats uri /status
    stats refresh 30s
    stats realm "Haproxy Manager"
    stats auth admin:password
    stats hide-version
    stats admin if TRUE
#---------------------------------------------------------------------
frontend  k8s-master-default-nodepool-apiserver
    bind *:6443
    mode tcp
    default_backend             k8s-master-default-nodepool
#---------------------------------------------------------------------
backend k8s-master-default-nodepool
    balance     roundrobin
    mode tcp
    server  k8s-apiserver-1 192.168.177.128:6443 check weight 1 maxconn 2000 check inter 2000 rise 2 fall 3
    server  k8s-apiserver-2 192.168.177.129:6443 check weight 1 maxconn 2000 check inter 2000 rise 2 fall 3
    server  k8s-apiserver-3 192.168.177.130:6443 check weight 1 maxconn 2000 check inter 2000 rise 2 fall 3
EOF

keepalived配置

worker131 主机配置

cat > /etc/keepalived/keepalived.conf  << EOF
! Configuration File for keepalived
global_defs {
   router_id LVS_DEVEL
   script_user root
   enable_script_security
}
vrrp_script check_haproxy {
   script "/etc/keepalived/check_haproxy.sh"
   interval 5
   weight -5
   fall 2 
rise 1
}
vrrp_instance VI_1 {
   state BACKUP
   interface ens33
   # 非抢占vip模式
   nopreempt
   # 单播
   unicast_src_ip 192.168.177.131
   unicast_peer {
    192.168.177.132
    }
   virtual_router_id 51
   #优先级100大于从服务的99
   priority 100
   advert_int 2
   authentication {
       auth_type PASS
       auth_pass K8SHA_KA_AUTH
   }
   virtual_ipaddress {
       #配置规划的虚拟ip
       192.168.177.127
   }
   #配置对worker131主机haproxy进行监控的脚本
   track_script {
      #指定执行脚本的名称(vrrp_script check_haproxy此处做了配置)
      check_haproxy
   }
}
EOF

worker132 主机配置

cat  > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived
global_defs {
   router_id LVS_DEVEL
script_user root
   enable_script_security
}
vrrp_script check_haproxy {
   script "/etc/keepalived/check_haproxy.sh"
  interval 5
   weight -5
   fall 2 
rise 1
}
vrrp_instance VI_1 {
   state BACKUP
   interface ens33
   nopreempt
   unicast_src_ip 192.168.177.132
   unicast_peer {
    192.168.177.131
    }
   virtual_router_id 51
   priority 99
   advert_int 2
   authentication {
       auth_type PASS
       auth_pass K8SHA_KA_AUTH
   }
   virtual_ipaddress {
       192.168.177.127
   }
   #配置对worker132主机haproxy进行监控的脚本
   track_script {
      #指定执行脚本的名称(vrrp_script check_haproxy此处做了配置)
      check_haproxy
   }
}
EOF

健康检查脚本

cat > /etc/keepalived/check_haproxy.sh <<EOF 
#!/bin/bash
err=0
for k in $(seq 1 3)
do
   check_code=$(pgrep haproxy)
   if [[ $check_code == "" ]]; then
       err=$(expr $err + 1)
       sleep 1
       continue
   else
       err=0
       break
   fi
done

if [[ $err != "0" ]]; then
   echo "systemctl stop keepalived"
   /usr/bin/systemctl stop keepalived
   exit 1
else
   exit 0
fi
EOF
chmod +x /etc/keepalived/check_haproxy.sh

设置开启自启并验证高可用VIP

systemctl daemon-reload
systemctl enable --now haproxy
systemctl enable --now keepalived
#查看启动状态
systemctl status keepalived haproxy
#查看虚拟ip是否配置成功了
ip address show

在这里插入图片描述此时手动停止woker131主机上的haproxy服务模拟故障，由于keepalived中配置的有监控脚本把woker131主机keepalived服务停掉，vip会自动漂移到worker132的主机上，几乎不会丢包，回出现网络的轻微抖动，如果woker131的keepalived 服务故障恢复启动后，不会抢占vip(配置的非抢占模式)

设置关于k8s自签证书

自签CA

#创建k8s 的kube-apiserver证书
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
{
    "CA": {"expiry": "87600h"},
    "CN": "kubernetes",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF

#生成证书：
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

会生成ca.pem和ca-key.pem文件。

kube-apiserver 自签证书

#创建证书申请文件：
cat > server-csr.json << EOF
{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "192.168.177.127",
      "192.168.177.128",
      "192.168.177.129",
      "192.168.177.130",
      "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

#注：上述文件hosts字段中IP为所有Master/LB/VIP IP，一个都不能少！为了方便后期扩容可以多写几个预留的IP。

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

#会生成server.pem和server-key.pem文件。

kube-controller-manager自签证书

# 创建证书请求文件
cat > kube-controller-manager-csr.json << EOF
{
  "CN": "system:kube-controller-manager",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing", 
      "ST": "BeiJing",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}
EOF

# 生成证书
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

kube-scheduler自签证书

# 创建证书请求文件
cat > kube-scheduler-csr.json << EOF
{
  "CN": "system:kube-scheduler",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}
EOF

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

kube-proxy 自签证书

# 创建证书请求文件
cat > kube-proxy-csr.json << EOF
{
  "CN": "system:kube-proxy",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF
# 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

admin 自签证书

#生成kubectl连接集群的证书：
cat > admin-csr.json <<EOF
{
  "CN": "admin",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "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

此时/root/TLS/k8s目录下会有如下这么多文件
在这里插入图片描述

控制平面节点组件部署

准备工作(在os128节点上操作)

#部署k8s1.27.2 
#下载安装包
wget  https://dl.k8s.io/v1.27.2/kubernetes-server-linux-amd64.tar.gz

#解压二进制包
mkdir -p /opt/kubernetes/{bin,cfg,ssl,logs} 
tar -zxvf kubernetes-server-linux-amd64.tar.gz
cd kubernetes/server/bin
cp kube-apiserver kube-scheduler kube-controller-manager  kubelet   kube-proxy /opt/kubernetes/bin
cp kubectl /usr/bin/
cp kubectl /usr/local/bin/
# 证书拷贝
cp ~/TLS/k8s/ca*pem ~/TLS/k8s/server*pem /opt/kubernetes/ssl/

部署kube-apiserver
创建kube-apiserver配置文件

	# 创建kube-apiserver配置文件
	cat > /opt/kubernetes/cfg/kube-apiserver.conf <<EOF
	KUBE_APISERVER_OPTS="--enable-admission-plugins=NamespaceLifecycle,NodeRestriction,LimitRanger,ServiceAccount,DefaultStorageClass,ResourceQuota \\
	--v=2 \\
	--etcd-servers=https://192.168.177.128:2379,https://192.168.177.129:2379,https://192.168.177.130:2379 \\
	--bind-address=192.168.177.128 \\
	--secure-port=6443 \\
	--advertise-address=192.168.177.128 \\
	--allow-privileged=true \\
	--service-cluster-ip-range=10.0.0.0/24 \\
	--authorization-mode=RBAC,Node \\
	--enable-bootstrap-token-auth=true \\
	--token-auth-file=/opt/kubernetes/cfg/token.csv \\
	--service-node-port-range=30000-32767 \\
	--kubelet-client-certificate=/opt/kubernetes/ssl/server.pem \\
	--kubelet-client-key=/opt/kubernetes/ssl/server-key.pem \\
	--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 \\
	--service-account-issuer=api \\
	--service-account-signing-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 \\
	--requestheader-client-ca-file=/opt/kubernetes/ssl/ca.pem \\
	--proxy-client-cert-file=/opt/kubernetes/ssl/server.pem \\
	--proxy-client-key-file=/opt/kubernetes/ssl/server-key.pem \\
	--requestheader-allowed-names=kubernetes \\
	--requestheader-extra-headers-prefix=X-Remote-Extra- \\
	--requestheader-group-headers=X-Remote-Group \\
	--requestheader-username-headers=X-Remote-User \\
	--enable-aggregator-routing=true \\
	--audit-log-maxage=30 \\
	--audit-log-maxbackup=3 \\
	--audit-log-maxsize=100 \\
	--service-account-issuer=https://kubernetes.default.svc.cluster.local \\
	--kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname  \\
	--audit-log-path=/opt/kubernetes/logs/k8s-audit.log"
	EOF

启用 TLS Bootstrapping 机制

TLS Bootstraping：Master apiserver启用TLS认证后，Node节点kubelet和
kube-proxy要与kube-apiserver进行通信，必须使用CA签发的有效证书才可以，
当Node节点很多时，这种客户端证书颁发需要大量工作，同样也会增加集群扩展复杂度。
为了简化流程，Kubernetes引入了TLS bootstraping机制来自动颁发客户端证书，
kubelet会以一个低权限用户自动向apiserver申请证书，
kubelet的证书由apiserver动态签署。
所以强烈建议在Node上使用这种方式，目前主要用于kubelet，kube-proxy
还是由我们统一颁发一个证书。

创建token文件

	cat > /opt/kubernetes/cfg/token.csv << EOF
	c47ffb939f5ca36231d9e3121a252940,kubelet-bootstrap,10001,"system:node-bootstrapper"
	EOF
	格式：token，用户名，UID，用户组
	token可自行生成替换：
	head -c 16 /dev/urandom | od -An -t x | tr -d ' '

systemd管理kube-apiserver

#systemd管理apiserver
cat > /usr/lib/systemd/system/kube-apiserver.service << EOF
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-apiserver.conf
ExecStart=/opt/kubernetes/bin/kube-apiserver \$KUBE_APISERVER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

以下路径文件分发到其他master主机对应的路径

 /opt/kubernetes/bin 
 /opt/kubernetes/ssl 
 /opt/kubernetes/cfg 
 /usr/lib/systemd/system/kube-apiserver.service

不同主机的/opt/kubernetes/cfg/kube-apiserver.conf配置文件里面的IP要改成相应主机的

启动并设置开机启动

systemctl daemon-reload
systemctl start kube-apiserver 
systemctl enable kube-apiserver

部署kube-controller-manager
创建配置文件

# 创建配置文件
cat > /opt/kubernetes/cfg/kube-controller-manager.conf << EOF
KUBE_CONTROLLER_MANAGER_OPTS=" \\
--v=2 \\
--leader-elect=true \\
--kubeconfig=/opt/kubernetes/cfg/kube-controller-manager.kubeconfig \\
--bind-address=127.0.0.1 \\
--allocate-node-cidrs=true \\
--cluster-cidr=10.244.0.0/16 \\
--service-cluster-ip-range=10.0.0.0/24 \\
--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 \\
--cluster-signing-duration=87600h0m0s"
EOF

?--kubeconfig：连接apiserver配置文件
?--leader-elect：当该组件启动多个时，自动选举（HA）
?--cluster-signing-cert-file/--cluster-signing-key-file：自动为kubelet颁发证书的CA，与apiserver保持一致

说明：–bind-address监听的地址必须是127.0.0.1

生成kube-controller-manager.kubeconfig文件

KUBE_CONFIG="/opt/kubernetes/cfg/kube-controller-manager.kubeconfig"
KUBE_APISERVER="https://192.168.177.127:6443"
cd  ~/TLS/k8s
kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=${KUBE_CONFIG}
kubectl config set-credentials kube-controller-manager \
  --client-certificate=./kube-controller-manager.pem \
  --client-key=./kube-controller-manager-key.pem \
  --embed-certs=true \
  --kubeconfig=${KUBE_CONFIG}
kubectl config set-context default \
  --cluster=kubernetes \
  --user=kube-controller-manager \
  --kubeconfig=${KUBE_CONFIG}
kubectl config use-context default --kubeconfig=${KUBE_CONFIG}

systemd管理controller-manager

# systemd管理controller-manager
cat > /usr/lib/systemd/system/kube-controller-manager.service << EOF
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-controller-manager.conf
ExecStart=/opt/kubernetes/bin/kube-controller-manager \$KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

以下文件分发到其他master节点主机

/opt/kubernetes/bin/kube-controller-manager
/usr/lib/systemd/system/kube-controller-manager.service 
/opt/kubernetes/cfg/kube-controller-manager.conf  
/opt/kubernetes/cfg/kube-controller-manager.kubeconfig

启动并设置开机启动

systemctl daemon-reload
systemctl start kube-controller-manager
systemctl enable kube-controller-manager

部署kube-scheduler
创建配置文件

cat > /opt/kubernetes/cfg/kube-scheduler.conf << EOF
KUBE_SCHEDULER_OPTS=" \\
--v=2 \\
--leader-elect \\
--kubeconfig=/opt/kubernetes/cfg/kube-scheduler.kubeconfig \\
--bind-address=127.0.0.1"
EOF
 --kubeconfig：连接apiserver配置文件
 --leader-elect：当该组件启动多个时，自动选举（HA）

说明： --bind-address监听地址必须是127.0.0.1

生成kube-scheduler.kubeconfig

cd ~/TLS/k8s
KUBE_CONFIG="//opt/kubernetes/cfg/kube-scheduler.kubeconfig"
KUBE_APISERVER="https://192.168.177.127:6443"

kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=${KUBE_CONFIG}
kubectl config set-credentials kube-scheduler \
  --client-certificate=./kube-scheduler.pem \
  --client-key=./kube-scheduler-key.pem \
  --embed-certs=true \
  --kubeconfig=${KUBE_CONFIG}
kubectl config set-context default \
  --cluster=kubernetes \
  --user=kube-scheduler \
  --kubeconfig=${KUBE_CONFIG}
kubectl config use-context default --kubeconfig=${KUBE_CONFIG}

systemd管理kube-scheduler

# systemd管理scheduler
cat > /usr/lib/systemd/system/kube-scheduler.service << EOF
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes

[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-scheduler.conf
ExecStart=/opt/kubernetes/bin/kube-scheduler \$KUBE_SCHEDULER_OPTS
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

以下文件分发到其他master主机对应的路径

/opt/kubernetes/bin/kube-scheduler
/usr/lib/systemd/system/kube-scheduler.service 
/opt/kubernetes/cfg/kube-scheduler.conf  
/opt/kubernetes/cfg/kube-scheduler.kubeconfig

启动并设置开机启动

# 启动并设置开机启动
systemctl daemon-reload
systemctl start kube-scheduler
systemctl enable kube-scheduler

查看集群状态
生成管理集群的kubeconfig认证文件

# 生成管理集群的kubeconfig认证文件：
cd ~/TLS/k8s
mkdir /root/.kube
KUBE_CONFIG="/root/.kube/config"
KUBE_APISERVER="https://192.168.177.127:6443"
kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=${KUBE_CONFIG}
kubectl config set-credentials cluster-admin \
  --client-certificate=./admin.pem \
  --client-key=./admin-key.pem \
  --embed-certs=true \
  --kubeconfig=${KUBE_CONFIG}
kubectl config set-context default \
  --cluster=kubernetes \
  --user=cluster-admin \
  --kubeconfig=${KUBE_CONFIG}
kubectl config use-context default --kubeconfig=${KUBE_CONFIG}

使用kubectl 查看集群的状态

#查看集群信息
kubectl cluster-info
#查看集群组件状态
kubectl get cs

在这里插入图片描述 图片中的coredns可以忽略，后面会有coredns的部署

授权kubelet-bootstrap用户允许请求证书

授权kubelet-bootstrap用户允许请求证书
kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node-bootstrapper \
--user=kubelet-bootstrap

数据平面节点组件部署

容器运行时安装
- 安装docker(os131,os132主机)

# 二进制包下载地址：https://download.docker.com/linux/static/stable/x86_64/
wget https://download.docker.com/linux/static/stable/x86_64/docker-20.10.24.tgz
#解压
tar xvf docker-20.10.24.tgz
#拷贝二进制文件
cp docker/* /usr/bin/
#创建containerd的service文件,并且启动
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/bin/containerd
Type=notify
Delegate=yes
KillMode=process
Restart=always
RestartSec=5
LimitNPROC=infinity
LimitCORE=infinity
LimitNOFILE=1048576
TasksMax=infinity
OOMScoreAdjust=-999
[Install]
WantedBy=multi-user.target
EOF
systemctl enable --now containerd.service
#准备docker的service文件
cat > /etc/systemd/system/docker.service <<EOF
[Unit]
Description=Docker Application Container Engine
Documentation=https://docs.docker.com
After=network-online.target firewalld.service containerd.service
Wants=network-online.target
Requires=docker.socket containerd.service
[Service]
Type=notify
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
StartLimitBurst=3
StartLimitInterval=60s
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
TasksMax=infinity
Delegate=yes
KillMode=process
OOMScoreAdjust=-500
[Install]
WantedBy=multi-user.target
EOF
#准备docker的socket文件
cat > /etc/systemd/system/docker.socket <<EOF
[Unit]
Description=Docker Socket for the API
[Socket]
ListenStream=/var/run/docker.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker
[Install]
WantedBy=sockets.target
EOF
#创建docker组
groupadd docker
#启动docker
systemctl enable --now docker.socket  && systemctl enable --now docker.service
#验证
docker info
cat >/etc/docker/daemon.json <<EOF
{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "registry-mirrors": [
    "https://docker.mirrors.ustc.edu.cn",
    "http://hub-mirror.c.163.com"
  ],
  "max-concurrent-downloads": 10,
  "log-driver": "json-file",
  "log-level": "warn",
  "log-opts": {
    "max-size": "10m",
    "max-file": "3"
    },
  "data-root": "/var/lib/docker"
}
EOF
systemctl restart docker

安装cri-dockerd（os131,os132主机）

 由于1.24以及更高版本不支持docker所以安装cri-docker
# 下载cri-docker 
wget  https://github.com/Mirantis/cri-dockerd/releases/download/v0.3.6/cri-dockerd-0.3.6.amd64.tgz  
 
# 解压cri-docker
tar -zxvf cri-dockerd-0.3.6.amd64.tgz  
cp cri-dockerd/cri-dockerd  /usr/bin/
chmod +x /usr/bin/cri-dockerd
# 写入启动配置文件
cat >  /usr/lib/systemd/system/cri-docker.service <<EOF
[Unit]
Description=CRI Interface for Docker Application Container Engine
Documentation=https://docs.mirantis.com
After=network-online.target firewalld.service docker.service
Wants=network-online.target
Requires=cri-docker.socket
 
[Service]
Type=notify
ExecStart=/usr/bin/cri-dockerd --network-plugin=cni --pod-infra-container-image=registry.aliyuncs.com/google_containers/pause:3.9
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always
 
StartLimitBurst=3
 
StartLimitInterval=60s
 
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
 
TasksMax=infinity
Delegate=yes
KillMode=process
 
[Install]
WantedBy=multi-user.target
EOF
 
# 写入socket配置文件
cat > /usr/lib/systemd/system/cri-docker.socket <<EOF
[Unit]
Description=CRI Docker Socket for the API
PartOf=cri-docker.service
 
[Socket]
ListenStream=%t/cri-dockerd.sock
SocketMode=0660
SocketUser=root
SocketGroup=docker
 
[Install]
WantedBy=sockets.target
EOF
 
# 进行启动cri-docker
systemctl daemon-reload ; systemctl enable cri-docker --now

安装containerd（os128,os129,os130主机）

wget  https://github.com/containerd/containerd/releases/download/v1.6.6/cri-containerd-cni-1.6.6-linux-amd64.tar.gz
tar  xvf cri-containerd-cni-1.6.6-linux-amd64.tar.gz  -C /
#配置 Containerd 所需的模块
cat > /etc/modules-load.d/containerd.conf << EOF
overlay
br_netfilter
EOF
#加载模块
systemctl restart systemd-modules-load.service

mkdir /etc/containerd
containerd config default > /etc/containerd/config.toml
sed  -i  's/\(sandbox_image\) =.*/\1 = "registry.aliyuncs.com\/google_containers\/pause:3.9"/g'  /etc/containerd/config.toml
systemctl daemon-reload
systemctl enable --now containerd
systemctl status containerd
#查看containerd相关模块加载情况：
lsmod | egrep 'br_netfilter|overlay'

安装runc（os128,os129,os130主机）
默认runc执行时提示：runc: symbol lookup error: runc: undefined symbol

wget  https://github.com/opencontainers/runc/releases/download/v1.1.11/runc.amd64
mv   runc.amd64  /usr/local/bin/runc

部署kubelet
准备工作

#在所有worker节点创建工作目录：
mkdir -p /opt/kubernetes/{bin,cfg,ssl,logs,manifests}

创建配置文件

cat  > /opt/kubernetes/cfg/kubelet.conf <<EOF
KUBELET_OPTS=" \\
--v=2 \\
--hostname-override=$(hostname) \\
--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \\
--bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \\
--config=/opt/kubernetes/cfg/kubelet-config.yml \\
--cert-dir=/opt/kubernetes/ssl \\
--runtime-request-timeout=15m  \\
--container-runtime-endpoint=unix:///run/cri-dockerd.sock \\
--cgroup-driver=systemd \\
--node-labels=node.kubernetes.io/node='Linux'"
EOF

--container-runtime-endpoint参数默认为containerd： 
   docker: unix:///run/cri-dockerd.sock
   containerd: unix:///run/containerd/containerd.sock

生成kubelet-conf.yml配置参数文件

cat > /opt/kubernetes/cfg/kubelet-conf.yml << EOF
apiVersion: kubelet.config.k8s.io/v1beta1
kind: KubeletConfiguration
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
authentication:
  anonymous:
    enabled: false
  webhook:
    cacheTTL: 2m0s
    enabled: true
  x509:
    clientCAFile: /opt/kubernetes/ssl/ca.pem
authorization:
  mode: Webhook
  webhook:
    cacheAuthorizedTTL: 5m0s
    cacheUnauthorizedTTL: 30s
cgroupDriver: systemd
cgroupsPerQOS: true
clusterDNS:
- 10.0.0.2
clusterDomain: cluster.local
containerLogMaxFiles: 5
containerLogMaxSize: 10Mi
contentType: application/vnd.kubernetes.protobuf
cpuCFSQuota: true
cpuManagerPolicy: none
cpuManagerReconcilePeriod: 10s
enableControllerAttachDetach: true
enableDebuggingHandlers: true
enforceNodeAllocatable:
- pods
eventBurst: 10
eventRecordQPS: 5
evictionHard:
  imagefs.available: 15%
  memory.available: 100Mi
  nodefs.available: 10%
  nodefs.inodesFree: 5%
evictionPressureTransitionPeriod: 5m0s
failSwapOn: true
fileCheckFrequency: 20s
hairpinMode: promiscuous-bridge
healthzBindAddress: 127.0.0.1
healthzPort: 10248
httpCheckFrequency: 20s
imageGCHighThresholdPercent: 85
imageGCLowThresholdPercent: 80
imageMinimumGCAge: 2m0s
iptablesDropBit: 15
iptablesMasqueradeBit: 14
kubeAPIBurst: 10
kubeAPIQPS: 5
makeIPTablesUtilChains: true
maxOpenFiles: 1000000
maxPods: 110
nodeStatusUpdateFrequency: 10s
oomScoreAdj: -999
podPidsLimit: -1
registryBurst: 10
registryPullQPS: 5
resolvConf: /etc/resolv.conf
rotateCertificates: true
runtimeRequestTimeout: 2m0s
serializeImagePulls: true
staticPodPath: /opt/kubernetes/manifests
streamingConnectionIdleTimeout: 4h0m0s
syncFrequency: 1m0s
volumeStatsAggPeriod: 1m0s
EOF

生成kubelet初次加入集群引导bootstrap.kubeconfig文件

#生成kubelet初次加入集群引导kubeconfig文件
KUBE_CONFIG="/opt/kubernetes/cfg/bootstrap.kubeconfig"
KUBE_APISERVER="https://192.168.177.127:6443" 
#与token.csv里保持一致
TOKEN="c47ffb939f5ca36231d9e3121a252940"

# 生成 kubelet bootstrap kubeconfig 配置文件
kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=${KUBE_CONFIG}
kubectl config set-credentials "kubelet-bootstrap" \
  --token=${TOKEN} \
  --kubeconfig=${KUBE_CONFIG}
kubectl config set-context default \
  --cluster=kubernetes \
  --user="kubelet-bootstrap" \
  --kubeconfig=${KUBE_CONFIG}
kubectl config use-context default --kubeconfig=${KUBE_CONFIG}

systemd管理kubelet

# systemd管理kubelet
cat > /usr/lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
#此处如果用的cri是docker不用修改，如果是containerd则需要改成containerd.service
After=docker.service

[Service]
EnvironmentFile=/opt/kubernetes/cfg/kubelet.conf
ExecStart=/opt/kubernetes/bin/kubelet \$KUBELET_OPTS
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

启动并设置开机启动

# 启动并设置开机启动
systemctl daemon-reload
systemctl start kubelet
systemctl enable kubelet

批准kubelet证书申请并加入集群


# 查看kubelet证书请求
[root@os128 system]# kubectl get csr 
NAME                                                   AGE   SIGNERNAME                                    REQUESTOR           REQUESTEDDURATION   CONDITION
node-csr-wgtllX256bvfMUN-ym0_JW4X0kigCvfDDUTysVAmlrQ   14s   kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   <none>              Pending

# 批准申请
kubectl certificate approve node-csr-wgtllX256bvfMUN-ym0_JW4X0kigCvfDDUTysVAmlrQ

# 查看节点
kubectl get node

其他worker节点kubelet 安装

# 从master节点上同步以下配置文件，修改成对应主机的启动kubelet即可：
/opt/kubernetes/cfg/kubelet.conf # hostname-override、container-runtime-endpoint 参数的值需要注意，hostname-override的值需要集群中唯一，container-runtime-endpoint的值取决于runtime 用的哪个
/usr/lib/systemd/system/kubelet.service # After 的值取决于主机上的runtime 用的哪个
/opt/kubernetes/cfg/kubelet-config.yml #不需要修改
/opt/kubernetes/cfg/kubelet.kubeconfig #不需要修改
/opt/kubernetes/cfg/bootstrap.kubeconfig #不需要修改
/opt/kubernetes/ssl/ca.pem #不需要修改
/opt/kubernetes/bin/kubelet #不需要修改
启动kubelet并设置开机启动,加入集群，批准证书申请参照上面步骤

查看所有节点加入情况
kubectl get node
部署kube-proxy
生成配置参数文件

cat > /opt/kubernetes/cfg/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: /opt/kubernetes/kubeconfig/kube-proxy.kubeconfig
  qps: 5
clusterCIDR: 10.244.0.0/16
configSyncPeriod: 15m0s
conntrack:
  max: null
  maxPerCore: 32768
  min: 131072
  tcpCloseWaitTimeout: 1h0m0s
  tcpEstablishedTimeout: 24h0m0s
enableProfiling: false
healthzBindAddress: 0.0.0.0:10256
hostnameOverride: $(hostname)
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

生成kube-proxy.kubeconfig文件

cd  ~/TLS/k8s
KUBE_CONFIG="/opt/kubernetes/cfg/kube-proxy.kubeconfig"
KUBE_APISERVER="https://192.168.177.127:6443"
kubectl config set-cluster kubernetes \
  --certificate-authority=/opt/kubernetes/ssl/ca.pem \
  --embed-certs=true \
  --server=${KUBE_APISERVER} \
  --kubeconfig=${KUBE_CONFIG}
kubectl config set-credentials kube-proxy \
  --client-certificate=./kube-proxy.pem \
  --client-key=./kube-proxy-key.pem \
  --embed-certs=true \
  --kubeconfig=${KUBE_CONFIG}
kubectl config set-context default \
  --cluster=kubernetes \
  --user=kube-proxy \
  --kubeconfig=${KUBE_CONFIG}
kubectl config use-context default --kubeconfig=${KUBE_CONFIG}

systemd管理kube-proxy

systemd管理kube-proxy

cat > /usr/lib/systemd/system/kube-proxy.service << EOF
[Unit]
Description=Kubernetes Proxy
After=network.target

[Service]
EnvironmentFile=/opt/kubernetes/cfg/kube-proxy.conf
ExecStart=/opt/kubernetes/bin/kube-proxy \$KUBE_PROXY_OPTS
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

启动并设置开机启动

#启动并设置开机启动
systemctl daemon-reload
systemctl start kube-proxy
systemctl enable kube-proxy

其他worker节点kube-proxy安装

#从master节点同步以下配置文件
/opt/kubernetes/bin/kube-proxy
/usr/lib/systemd/system/kube-proxy.service 
/opt/kubernetes/cfg/kube-proxy.kubeconfig
/opt/kubernetes/cfg/kube-proxy.yaml #hostnameOverride参数需要确认和当前主机是否一致
启动并设置开机启动

calico网络组件部署

下载calico

wget https://docs.tigera.io/archive/v3.25/manifests/calico.yaml

修改默认网段

# 把calico.yaml里pod所在网段改成 --cluster-cidr=10.244.0.0/16 时选项所指定的网段，
#直接用vim编辑打开此文件查找192，按如下标记进行修改：
# no effect. This should fall within `--cluster-cidr`.
# - name: CALICO_IPV4POOL_CIDR
#   value: "192.168.1.0/16"
# Disable file logging so `kubectl logs` works.
- name: CALICO_DISABLE_FILE_LOGGING
  value: "true"
  
把两个#及#后面的空格去掉，并把192.168.1.0/16改成10.244.0.0/16
# no effect. This should fall within `--cluster-cidr`.
- name: CALICO_IPV4POOL_CIDR
  value: "10.244.0.0/16"
# Disable file logging so `kubectl logs` works.
- name: CALICO_DISABLE_FILE_LOGGING
  value: "true"

部署calico
kubectl apply -f calico.yaml
验证calico
kubectl get pods -n kube-system
授权apiserver访问kubelet

#应用场景：例如kubectl logs
cat > apiserver-to-kubelet-rbac.yaml << EOF
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  annotations:
    rbac.authorization.kubernetes.io/autoupdate: "true"
  labels:
    kubernetes.io/bootstrapping: rbac-defaults
  name: system:kube-apiserver-to-kubelet
rules:
  - apiGroups:
      - ""
    resources:
      - nodes/proxy
      - nodes/stats
      - nodes/log
      - nodes/spec
      - nodes/metrics
      - pods/log
    verbs:
      - "*"
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: system:kube-apiserver
  namespace: ""
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: system:kube-apiserver-to-kubelet
subjects:
  - apiGroup: rbac.authorization.k8s.io
    kind: User
    name: kubernetes
EOF
kubectl apply -f apiserver-to-kubelet-rbac.yaml

coredns 组件部署

准备coredns.yml内容，https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/dns/coredns/coredns.yaml.base

cat > coredns.yml << EOF
apiVersion: v1
kind: ServiceAccount
metadata:
 name: coredns
 namespace: kube-system
 labels:
     kubernetes.io/cluster-service: "true"
     addonmanager.kubernetes.io/mode: Reconcile

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
 labels:
   kubernetes.io/bootstrapping: rbac-defaults
   addonmanager.kubernetes.io/mode: Reconcile
 name: system:coredns
rules:
- apiGroups:
 - ""
 resources:
 - endpoints
 - services
 - pods
 - namespaces
 verbs:
 - list
 - watch
- apiGroups:
 - discovery.k8s.io
 resources:
 - endpointslices
 verbs:
 - list
 - watch

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
 annotations:
   rbac.authorization.kubernetes.io/autoupdate: "true"
 labels:
   kubernetes.io/bootstrapping: rbac-defaults
   addonmanager.kubernetes.io/mode: EnsureExists
 name: system:coredns
roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: ClusterRole
 name: system:coredns
subjects:
- kind: ServiceAccount
 name: coredns
 namespace: kube-system


---
apiVersion: v1
kind: ConfigMap
metadata:
 name: coredns
 namespace: kube-system
 labels:
     addonmanager.kubernetes.io/mode: EnsureExists
data:
 Corefile: |
   .:53 {
       errors
       health {
           lameduck 5s
       }
       ready
       kubernetes __DNS__DOMAIN__ in-addr.arpa ip6.arpa {
           pods insecure
           fallthrough in-addr.arpa ip6.arpa
           ttl 30
       }
       prometheus :9153
       forward . /etc/resolv.conf {
           max_concurrent 1000
       }
       cache 30
       loop
       reload
       loadbalance
   }

---
apiVersion: apps/v1
kind: Deployment
metadata:
 name: coredns
 namespace: kube-system
 labels:
   k8s-app: kube-dns
   kubernetes.io/cluster-service: "true"
   addonmanager.kubernetes.io/mode: Reconcile
   kubernetes.io/name: "CoreDNS"
spec:
 # replicas: not specified here:
 # 1. In order to make Addon Manager do not reconcile this replicas parameter.
 # 2. Default is 1.
 # 3. Will be tuned in real time if DNS horizontal auto-scaling is turned on.
 strategy:
   type: RollingUpdate
   rollingUpdate:
     maxUnavailable: 1
 selector:
   matchLabels:
     k8s-app: kube-dns
 template:
   metadata:
     labels:
       k8s-app: kube-dns
   spec:
     securityContext:
       seccompProfile:
         type: RuntimeDefault
     priorityClassName: system-cluster-critical
     serviceAccountName: coredns
     affinity:
       podAntiAffinity:
         preferredDuringSchedulingIgnoredDuringExecution:
         - weight: 100
           podAffinityTerm:
             labelSelector:
               matchExpressions:
                 - key: k8s-app
                   operator: In
                   values: ["kube-dns"]
             topologyKey: kubernetes.io/hostname
     tolerations:
       - key: "CriticalAddonsOnly"
         operator: "Exists"
     nodeSelector:
       kubernetes.io/os: linux
     containers:
     - name: coredns
       image: registry.k8s.io/coredns/coredns:v1.11.1
       imagePullPolicy: IfNotPresent
       resources:
         limits:
           memory: __DNS__MEMORY__LIMIT__
         requests:
           cpu: 100m
           memory: 70Mi
       args: [ "-conf", "/etc/coredns/Corefile" ]
       volumeMounts:
       - name: config-volume
         mountPath: /etc/coredns
         readOnly: true
       ports:
       - containerPort: 53
         name: dns
         protocol: UDP
       - containerPort: 53
         name: dns-tcp
         protocol: TCP
       - containerPort: 9153
         name: metrics
         protocol: TCP
       livenessProbe:
         httpGet:
           path: /health
           port: 8080
           scheme: HTTP
         initialDelaySeconds: 60
         timeoutSeconds: 5
         successThreshold: 1
         failureThreshold: 5
       readinessProbe:
         httpGet:
           path: /ready
           port: 8181
           scheme: HTTP
       securityContext:
         allowPrivilegeEscalation: false
         capabilities:
           add:
           - NET_BIND_SERVICE
           drop:
           - ALL
         readOnlyRootFilesystem: true
     dnsPolicy: Default
     volumes:
       - name: config-volume
         configMap:
           name: coredns
           items:
           - key: Corefile
             path: Corefile

---
apiVersion: v1
kind: Service
metadata:
 name: kube-dns
 namespace: kube-system
 annotations:
   prometheus.io/port: "9153"
   prometheus.io/scrape: "true"
 labels:
   k8s-app: kube-dns
   kubernetes.io/cluster-service: "true"
   addonmanager.kubernetes.io/mode: Reconcile
   kubernetes.io/name: "CoreDNS"
spec:
 selector:
   k8s-app: kube-dns
 clusterIP: __DNS__SERVER__
 ports:
 - name: dns
   port: 53
   protocol: UDP
 - name: dns-tcp
   port: 53
   protocol: TCP
 - name: metrics
   port: 9153
   protocol: TCP
EOF

部署coredns
kubectl apply -f coredns.yml
查看coredns 服务部署
kubectl get pod -n kube-system | grep coredns
生产环境需要调整coredns的资源分配并加上hpa

dashboard 组件部署

部署dashboard

wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.7.0/aio/deploy/recommended.yaml
# 修改svc为nodePort方式
vim recommended.yaml
----
spec:
  ports:
    - port: 443
      targetPort: 8443
      nodePort: 30001
  type: NodePort
  selector:
    k8s-app: kubernetes-dashboard
----
kubectl apply -f recommended.yaml
# 查看dashboard服务
kubectl get pods -n kubernetes-dashboard
kubectl get pods,svc -n kubernetes-dashboard

创建service account并绑定默认cluster-admin管理员集群角色

# 创建service account并绑定默认cluster-admin管理员集群角色：

cat  > dashadmin.yaml  << EOF
apiVersion: v1
kind: ServiceAccount
metadata:
  name: admin-user
  namespace: kubernetes-dashboard

---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: admin-user
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: admin-user
  namespace: kubernetes-dashboard
EOF
kubectl apply -f dashadmin.yaml
# 创建用户登录token,生成的token可以用来登录dashboard
kubectl -n kubernetes-dashboard create token admin-user

验证dashboard登录，访问：https://192.168.177.128:30001,token用上面生成的或者使用kubeconfig文件登录
- 登录成功界面如下：
k8s 的dashboard 也可以使用Rancher来管理,图形界面账号项目权限更友好

metrics-server 组件部署

部署metrics-server

# 下载
wget https://github.com/kubernetes-sigs/metrics-server/releases/download/v0.6.1/components.yaml 
# 修改文件中服务的镜像地址
sed -i  's/\(image:\).*/\1 registry.aliyuncs.com\/google_containers\/metrics-server:v0.6.1/g' components.yaml 
# 部署
kubectl apply -f components.yaml 
# 验证, 使用kubectl top 可以看到数据说明就正常了
kubectl top node
kubectl top pod  -A

ingress 组件部署

部署ingress-nginx-deploy

# 下载
wget https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.8.0/deploy/static/provider/baremetal/deploy.yaml -O ingress-nginx-deploy.yaml
#查看镜像地址
 grep "image:" ingress-nginx-deploy.yaml 
# mage: registry.k8s.io/ingress-nginx/controller:v1.8.0@sha256:744ae2afd433a395eeb13dc03d3313facba92e96ad71d9feaafc85925493fee3
 #image: registry.k8s.io/ingress-nginx/kube-webhook-certgen:v20230407@sha256:543c40fd093964bc9ab509d3e791f9989963021f1e9e4c9c7b6700b02bfb227b
 #image: registry.k8s.io/ingress-nginx/kube-webhook-certgen:v20230407@sha256:543c40fd093964bc9ab509d3e791f9989963021f1e9e4c9c7b6700b02bfb227b
# 替换镜像
sed  -i   '/controller/s/\(image:\).*/\1 registry.cn-hangzhou.aliyuncs.com\/google_containers\/nginx-ingress-controller:v1.8.0/'  ingress-nginx-deploy.yaml 
sed  -i   '/kube-webhook-certgen/s/\(image:\).*/\1 registry.cn-hangzhou.aliyuncs.com\/google_containers\/kube-webhook-certgen:v20230407/'  ingress-nginx-deploy.yaml 
# 部署ingress-nginx
kubectl apply  -f ingress-nginx-deploy.yaml 

#查看ingress-nginx服务
 kubectl get all -n ingress-nginx

在这里插入图片描述

helm、kubens、crictl、ctr 工具

helm
Helm 是一个用于管理 Kubernetes 应用程序的包管理工具。它允许您定义、安装和升级 Kubernetes 应用程序的预定义包，这些包被称为 “charts”。每个 Helm chart 包含了一组描述 Kubernetes 资源的文件，例如部署、服务、配置映射等。

 #下载
  wget https://get.helm.sh/helm-v3.14.0-linux-amd64.tar.gz
  tar xvf  helm-v3.14.0-linux-amd64.tar.gz
  mv helm  /usr/local/bin
  chmod +x /usr/local/bin/helm

kubens
kubens 是一个用于快速切换 Kubernetes 命名空间的命令行工具。它是 kubectx 工具包的一部分，用于管理 Kubernetes 上下文和命名空间

#下载
wget https://github.com/ahmetb/kubectx/releases/download/v0.9.5/kubens_v0.9.5_linux_x86_64.tar.gz
# 解压
tar xvf kubens_v0.9.5_linux_x86_64.tar.gz 
mv kubens  /usr/local/bin
chmod +x   /usr/local/bin/kubens
# kubens命令用法
kubens：列出当前配置的所有命名空间。
kubens <namespace>：切换到指定的命名空间。
kubens -c：列出当前配置的所有上下文。
kubens -u：列出当前用户有权访问的所有命名空间

crictl
crictl 是一个用于与容器运行时（Container Runtime Interface，CRI）接口兼容的容器运行时进行交互的命令行工具，默认配置文件路径/etc/crictl.yaml

#下载
wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.29.0/crictl-v1.29.0-linux-amd64.tar.gz
tar xvf crictl-v1.29.0-linux-amd64.tar.gz
mv crictl /usr/local/bin
chmod +x   /usr/local/bin/crictl
#crictl 命令使用  
crictl version： 查看版本
crictl pods： 列出主机上有哪些pod
crictl images：列出容器运行时中的镜像列表。
crictl ps：列出容器运行时中正在运行的容器列表。
crictl create：创建一个新的容器。
crictl start：启动一个已经创建的容器。
crictl stop：停止一个正在运行的容器。
crictl rm：删除一个容器。
crictl logs：查看容器的日志。
crictl inspect：查看容器或镜像的详细信息。
crictl pull：从容器镜像仓库中拉取镜像。
crictl rmi：删除一个镜像。

ctr
ctr是Containerd开发的一个命令行工具,可以与Containerd进行交互,用于管理容器、镜像以及其他资源,Containerd 中每个容器实例都会关联到一个命名空间,默认是默认命名空间(default)

 #查看有哪些namespace，默认namespace: default
  ctr namespaces
 # 查看namespace：k8s.io下面有哪些container/task/image
  ctr -n k8s.io containers list 
  ctr -n k8s.io tasks list 
  ctr -n k8s.io images list

nfs storageclass动态pv存储

参考之前的写的这篇博客

loki 日志采集部署

待完善

Promthous 组件部署

待完善

argocd组件部署

待完善

FAQ

kubelet服务启动报错：
validate CRI v1 runtime API for endpoint "unix:///run/cri-dockerd.sock": rpc error: code = Unimplemented desc = unknown service runtime.v1.RuntimeService
原因及解决方案：cri-dokcerd-v0.2.6的版本有问题，更换到cri-dokcerd-v0.3.6 的版本问题解决
某个节点上的calico-node 启动报错：
ERROR][1] cni-installer/<nil> <nil>: Unable to create token for CNI kubeconfig error=Post "https://10.0.0.1:443/api/v1/namespaces/kube-system/serviceaccounts/calico-node/token": dial tcp 10.0.0.1:443: connect: connection refused
原因及方案：该节点上的kube-proxy 忘记启动，启动kube-proxy服务问题解决

文章来源:https://blog.csdn.net/qq_23191379/article/details/135725434
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k8s1.27.2版本二进制高可用集群部署

文章目录

环境

软件版本

服务器系统初始化

设置关于etcd签名证书

etcd集群部署

负载均衡器组件安装

设置关于k8s自签证书

自签CA

kube-apiserver 自签证书

kube-controller-manager自签证书

kube-scheduler自签证书

kube-proxy 自签证书

admin 自签证书

控制平面节点组件部署

部署kube-apiserver

部署kube-controller-manager

部署kube-scheduler

查看集群状态