二进制安装kubernets 1.20

1、基础环境准备1.1 服务器环境最小化安装基础系统，并关闭防火墙 selinux和swap，更新软件源、时间同步、安装常用命令，重启后验证基础配置这里使用Ubuntu18.04部署角色主机名ipk8s-master1k8s-master110.10.100.101k8s-master2k8s-master210.10.100.102k8s-master3k8s-master210.10.100.

cwy_linux

1383人浏览 · 2022-05-20 18:13:04

cwy_linux · 2022-05-20 18:13:04 发布

1、基础环境准备

1.1 服务器环境

最小化安装基础系统，并关闭防火墙 selinux和swap，更新软件源、时间同步、安装常用命令，重启后验证基础配置
这里使用Ubuntu18.04部署

角色	主机名	ip
k8s-master1	k8s-master1	10.10.100.101
k8s-master2	k8s-master2	10.10.100.102
k8s-master3	k8s-master2	10.10.100.103
haproxy1	haproxy1	10.10.100.104
haproxy2	haproxy2	10.10.100.105
harbor	harbor	10.10.100.111
node1	k8s-node1	10.10.100.107
node2	k8s-node2	10.10.100.108
node3	k8s-node3	10.10.100.109
etcd1	k8s-etcd1	10.10.100.112
etcd2	k8s-etcd2	10.10.100.113
etcd3	k8s-etcd3	10.10.100.114

2、反向代理

2.1 keepalived安装配置

2.1.1 安装

#安装keepalived
root@haproxy1:~# apt-get install keepalived -y

#拷贝配置文件
root@haproxy1:~# cp /usr/share/doc/keepalived/samples/keepalived.conf.vrrp /etc/keepalived/keepalived.conf

2.1.2 配置

master

root@haproxy1:~# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
   notification_email {
     acassen
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
   vrrp_garp_interval 0
   vrrp_gna_interval 0
   vrrp_mcast_group4 224.0.0.18
}

vrrp_instance VI_1 {
    state MASTER
    interface eth0
    virtual_router_id 80
    priority 100
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }

    unicast_src_ip 10.10.100.104
    unicast_peer {
      10.10.100.105
    }
    virtual_ipaddress {
        10.10.100.188 dev eth0 label eth0:1
    }
}

BACKUP

root@haproxy2:~# cat /etc/keepalived/keepalived.conf
! Configuration File for keepalived

global_defs {
   notification_email {
     acassen
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
   vrrp_garp_interval 0
   vrrp_gna_interval 0
   vrrp_mcast_group4 224.0.0.18
}

vrrp_instance VI_1 {
    state BACKUP
    interface eth0
    virtual_router_id 80
    priority 80
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }

    unicast_src_ip 10.10.100.105
    unicast_peer {
      10.10.100.104
    }
    virtual_ipaddress {
        10.10.100.188 dev eth0 label eth0:1
    }
}

2.2 haproxy安装配置

2.2.1 安装

root@haproxy1:~# apt-get install software-properties-common
root@haproxy1:~# add-apt-repository ppa:vbernat/haproxy-2.0
root@haproxy1:~# apt update
root@haproxy1:~# apt-cache madison haproxy
root@haproxy1:~# apt install haproxy=2.0.28-1ppa1~bionic -y

2.2.3 配置文件

listen stats
    mode http
    bind 0.0.0.0:9999
    stats enable
    log global
    stats uri    /haproxy-status
    stats auth   haadmin:123456

listen k8s-6443
  bind 10.10.100.188:6443
  mode tcp
  balance roundrobin
  server 10.10.100.101 10.10.100.101:6443 check inter 2s fall 3 rise 5 
  server 10.10.100.102 10.10.100.102:6443 check inter 2s fall 3 rise 5 
  server 10.10.100.103 10.10.100.103:6443 check inter 2s fall 3 rise 5

2.2.4 修改内核参数

允许绑定非本机ip

echo "net.ipv4.ip_nonlocal_bind=1" >> /etc/sysctl.conf

sysctl -p

3、安装 harbor

#安装docker
curl -fsSL https://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | sudo apt-key add -
add-apt-repository "deb [arch=amd64] https://mirrors.aliyun.com/docker-ce/linux/ubuntu $(lsb_release -cs) stable"
apt-get -y update
apt-get -y install docker-ce=5:20.10.10~3-0~ubuntu-bionic

#安装docker-compose
apt install python-pip -y
pip install --upgrade pip
pip install docker-compose

#安装harbor
cd /usr/local/src
wget https://storage.googleapis.com/harbor-releases/release-1.7.0/harbor-offline-installer-v1.7.6.tgz
tar xf harbor-offline-installer-v1.7.6.tgz
ln -sv /usr/local/src/harbor /usr/local/

#修改harbor配置文件
cd /usr/local/harbor
vim harbor.cfg
#修改如下配置
hostname = 10.10.100.111
ui_url_protocol = http
harbor_admin_password = 123456

#执行安装脚本
./install.sh

4、二进制部署k8s

4.1 系统初始化

#关闭swap
swapoff -a  # 临时关闭
sed -ri 's/.*swap.*/#&/' /etc/fstab    # 永久关闭

#根据规划设置主机名
hostnamectl set-hostname <hostname> #设置对应的主机名

# 各节点添加hosts
cat >> /etc/hosts <<EOF
10.10.100.101 k8s-master1
10.10.100.102 k8s-master2
10.10.100.103 k8s-master3
10.10.100.107 k8s-node1
10.10.100.108 k8s-node2
10.10.100.109 k8s-node3
EOF

#修改内核参数
cat <<EOF > /etc/sysctl.d/k8s.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
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 = 65536
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_timestamps = 0
net.core.somaxconn = 16384
net.bridge.bridge-nf-call-ip6tables = 1 
net.bridge.bridge-nf-call-iptables = 1 
EOF

sysctl --system  # 生效

#安装ipvsadm
apt install ipvsadm ipset -y


cat >> /etc/modules-load.d/ipvs.conf <<EOF
ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
EOF

systemctl restart systemd-modules-load.service

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

#时间同步
apt install ntpdate -y
ntpdate time1.aliyun.com

5、部署etcd集群

5.1 准备cfssl 证书生成工具

找任意一台服务器操作即可

#下载cfssl工具
mkdir /opt/cfssl -p && cd /opt/cfssl
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

cp cfssl_linux-amd64 /usr/local/bin/cfssl
cp cfssljson_linux-amd64 /usr/local/bin/cfssljson
cp cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo

5.2 生成Etcd证书

5.2.1 自签CA证书

#创建工作目录
mkdir -p ~/TLS/{etcd,k8s}
cd ~/TLS/etcd/

#自签CA证书
#证书生成模板
cat > ca-config.json << EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "www": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}

#csr请求模板
cat > ca-csr.json << EOF
{
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "GuangDong",
            "ST": "ShenZhen"
        }
    ]
}
EOF

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

5.2.2 签发ETCD证书

#创建证书申请文件，hosts 填写etcd所有节点ip
cat > server-csr.json << EOF
{
    "CN": "etcd",
    "hosts": [
    "10.10.100.112",
    "10.10.100.113",
    "10.10.100.114"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "GuangDong",
            "ST": "ShenZhen"
        }
    ]
}
EOF

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

5.3 下载安装etcd集群

5.3.1 下载etcd二进制文件

cd /opt
wget https://github.com/etcd-io/etcd/releases/download/v3.4.9/etcd-v3.4.9-linux-amd64.tar.gz

5.3.2 配置文件准备

#解压
tar xf etcd-v3.4.9-linux-amd64.tar.gz

#拷贝二进制文件
mkdir /opt/etcd/{bin,cfg,ssl} -p
cp etcd-v3.4.9-linux-amd64/{etcd,etcdctl} /opt/etcd/bin

#创建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://10.10.100.112:2380" 
ETCD_LISTEN_CLIENT_URLS="https://10.10.100.112:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.10.100.112:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://10.10.100.112:2379" 
ETCD_INITIAL_CLUSTER="etcd-1=https://10.10.100.112:2380,etcd-2=https://10.10.100.113:2380,etcd-3=https://10.10.100.114:2380" 
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_PEERURLS：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_INITIALCLUSTER_TOKEN：集群Token
•ETCD_INITIALCLUSTER_STATE：加入集群的当前状态，new是新集群，existing表示加入已有集群
#配置文件中不可以有注释，不然会启动报错。

#创建systemd启动文件
cat > /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

5.3.3 拷贝刚生成的证书文件

#将刚刚生成的证书拷贝到etcd节点
scp ./*pem 10.10.100.112/opt/etcd/ssl/

5.3.4 将节点1的所有etcd文件拷贝到其他节点

scp -r /opt/etcd 10.10.100.113:/opt/
scp -r /lib/systemd/system/etcd.service  10.10.100.114:/lib/systemd/system/

scp -r /opt/etcd 10.10.100.114:/opt/
scp -r /lib/systemd/system/etcd.service  10.10.100.113:/lib/systemd/system/

5.3.5 修改node2,node3节点etcd.conf配置文件

vim /opt/etcd/cfg/etcd.conf 
#[Member]
ETCD_NAME="etcd-2"  # 修改此处，节点2改为etcd-2，节点3改为etcd-3
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://10.10.100.113:2380" # 修改此处为当前服务器IP
ETCD_LISTEN_CLIENT_URLS="https://10.10.100.113:2379" # 修改此处为当前服务器IP

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://10.10.100.113:2380" # 修改此处为当前服务器IP
ETCD_ADVERTISE_CLIENT_URLS="https://10.10.100.113:2379" # 修改此处为当前服务器IP
ETCD_INITIAL_CLUSTER="etcd-1=https://10.10.100.112:2380,etcd-2=https://10.10.100.113:2380,etcd-3=https://10.10.100.114:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

5.3.6 启动并验证etcd集群信息

#启动
systemctl daemon-reload
systemctl start etcd && systemctl enable etcd

#验证etcd集群信息，输出下面信息，说明部署成功
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://10.10.100.112:2379,https://10.10.100.113:2379,https://10.10.100.114:2379" endpoint health --write-out=table
+----------------------------+--------+-------------+-------+
|          ENDPOINT          | HEALTH |    TOOK     | ERROR |
+----------------------------+--------+-------------+-------+
| https://10.10.100.112:2379 |   true |  6.255737ms |       |
| https://10.10.100.113:2379 |   true |  9.044208ms |       |
| https://10.10.100.114:2379 |   true | 11.886294ms |       |
+----------------------------+--------+-------------+-------+

6、 Master 部署

6.1 安装docker

master及node节点都安装docker

curl -fsSL https://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | sudo apt-key add -
add-apt-repository "deb [arch=amd64] https://mirrors.aliyun.com/docker-ce/linux/ubuntu $(lsb_release -cs) stable"
apt-get -y update
#安装20.10.15版本docker
apt-get -y install docker-ce=5:20.10.15~3-0~ubuntu-bionic docker-ce-cli=5:20.10.15~3-0~ubuntu-bionic

#启动docker
root@docker-node1:~# systemctl start docker
root@docker-node1:~# systemctl enable docker

6.2 kube-apiserver 部署

6.2.1 生成kube-apiserver 证书

6.2.1.1 自签CA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
{
    "CN": "kubernetes",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "GuangDong",
            "ST": "ShenZhen",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF

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

6.2.1.2 签发kube-apiserver HTTPS证书

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。

cat > server-csr.json << EOF
{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "10.10.100.101",
      "10.10.100.102",
      "10.10.100.103",
      "10.10.100.188",
      "kubernetes",
      "kubernetes.default",
      "kubernetes.default.svc",
      "kubernetes.default.svc.cluster",
      "kubernetes.default.svc.cluster.local"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "GuangDong",
            "ST": "ShenZhen",
            "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 server-csr.json | cfssljson -bare server

6.2.2 下载k8s二进制文件

下载地址：https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.20.md

只需要下载server包就够了，包含了Master和Worker Node二进制文件

#下载v1.20.13版本
wget https://dl.k8s.io/v1.20.13/kubernetes-server-linux-amd64.tar.gz

##解压
tar xf kubernetes-server-linux-amd64.tar.gz

#拷贝二进制文件
mkdir -p /opt/kubernetes/{bin,cfg,ssl,logs}
cd kubernetes/server/bin/
cp kube-apiserver kube-scheduler kube-controller-manager /opt/kubernetes/bin/
cp kubectl /usr/bin/

6.2.3 部署kube-apiserver

6.2.3.1 创建kube-apiserver配置文件

3个master节点都配置，注意–bind-address --advertise-address两个参数需配置成对应节点的ip

cat > /opt/kubernetes/cfg/kube-apiserver.conf << EOF
KUBE_APISERVER_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/opt/kubernetes/logs \\
--etcd-servers=https://10.10.100.112:2379,https://10.10.100.113:2379,https://10.10.100.114:2379 \\
--bind-address=10.10.100.101 \\
--secure-port=6443 \\
--advertise-address=10.10.100.101 \\
--allow-privileged=true \\
--service-cluster-ip-range=10.0.0.0/24 \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction \\
--authorization-mode=RBAC,Node \\
--enable-bootstrap-token-auth=true \\
--token-auth-file=/opt/kubernetes/cfg/token.csv \\
--service-node-port-range=30000-40000 \\
--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/server-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 \\
--audit-log-path=/opt/kubernetes/logs/k8s-audit.log"
EOF

#参数详解
–logtostderr：启用日志
—v：日志等级
–log-dir：日志目录
–etcd-servers：etcd集群地址
–bind-address：监听地址
–secure-port：https安全端口
–advertise-address：集群通告地址
–allow-privileged：启用授权
–service-cluster-ip-range：Service虚拟IP地址段
–enable-admission-plugins：准入控制模块
–authorization-mode：认证授权，启用RBAC授权和节点自管理
–enable-bootstrap-token-auth：启用TLS bootstrap机制
–token-auth-file：bootstrap token文件
–service-node-port-range：Service nodeport类型默认分配端口范围
–kubelet-client-xxx：apiserver访问kubelet客户端证书
–tls-xxx-file：apiserver https证书
–service-account-issuer，–service-account-signing-key-file
–etcd-xxxfile：连接Etcd集群证书
–audit-log-xxx：审计日志
启动聚合层相关配置：–requestheader-client-ca-file，–proxy-client-cert-file，–proxy-client-key-file，–requestheader-allowed-names，–requestheader-extra-headers-prefix，–requestheader-group-headers，–requestheader-username-headers，–enable-aggregator-routing

6.2.3.2 拷贝证书

#拷贝etcd证书
mkdir /opt/etcd/ssl/
scp -r ~/TLS/etcd/*pem 10.10.100.101:/opt/etcd/ssl/
#拷贝k8s证书
scp ~/TLS/k8s/*.pem 10.10.100.101:/opt/kubernetes/ssl/

6.2.3.2 启用TLS Bootstrapping 机制

 cat > /opt/kubernetes/cfg/token.csv << EOF
9deea7a5a8b7fa15c500a4dac68209c8,kubelet-bootstrap,10001,"system:node-bootstrapper"
EOF


格式：token，用户名，UID，用户组

token也可自行生成替换：
head -c 16 /dev/urandom | od -An -t x | tr -d ' '

6.2.3.2 配置启动文件

cat > /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

#启动
systemctl daemon-reload
systemctl start kube-apiserver  && systemctl enable kube-apiserver

6.3 部署kube-controller-manager

6.3.1 创建配置文件

所有master节点配置都一样

cat > /opt/kubernetes/cfg/kube-controller-manager.conf << EOF
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/opt/kubernetes/logs \\
--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

6.3.2 生成kube-controller-manager证书

cd ~/TLS/k8s
{
  "CN": "system:kube-controller-manager",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
       "L": "GuangDong",
       "ST": "ShenZhen",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}
EOF

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

6.3.3 生成kubeconfig文件

#拷贝证书,将证书拷贝到所有master节点
scp kube-controller-manager*.pem 10.10.100.101:/opt/kubernetes/ssl/
scp kube-controller-manager*.pem 10.10.100.102:/opt/kubernetes/ssl/
scp kube-controller-manager*.pem 10.10.100.103:/opt/kubernetes/ssl/

#在所有master节点操作
#需要在/opt/kubernetes/ssl/目录下执行命令或脚本
#KUBE_APISERVER可以配置成集群vip，也可以配置对应master的ip
cd /opt/kubernetes/ssl/
KUBE_CONFIG="/opt/kubernetes/cfg/kube-controller-manager.kubeconfig"
KUBE_APISERVER="https://10.10.100.188:6443"

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-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}

6.3.4 配置启动文件

cat > /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

#启动
systemctl daemon-reload
systemctl start kube-controller-manager  && systemctl enable kube-controller-manager

6.4 部署kube-scheduler

6.4.1 生成kube-scheduler证书

cd ~/TLS/k8s/
cat > kube-scheduler-csr.json << EOF
{
  "CN": "system:kube-scheduler",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "GuangDong",
      "ST": "ShenZhen",
      "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

#拷贝证书到各master节点
scp /root/TLS/k8s/kube-scheduler*.pem 10.10.100.101:/opt/kubernetes/ssl/
scp /root/TLS/k8s/kube-scheduler*.pem 10.10.100.102:/opt/kubernetes/ssl/
scp /root/TLS/k8s/kube-scheduler*.pem 10.10.100.103:/opt/kubernetes/ssl/

6.4.2 创建配置文件

cat > /opt/kubernetes/cfg/kube-scheduler.conf << EOF
KUBE_SCHEDULER_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/opt/kubernetes/logs \\
--leader-elect=true \\
--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）

6.4.3 生成kubeconfig文件

#cd到证书目录下执行
cd /opt/kubernetes/ssl

KUBE_CONFIG="/opt/kubernetes/cfg/kube-scheduler.kubeconfig"
KUBE_APISERVER="https://10.10.100.188:6443"

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}

6.4.4 配置启动文件

cat > /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

#启动
systemctl daemon-reload
systemctl start kube-scheduler && systemctl enable kube-scheduler

6.5 查看集群状态

6.5.1 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": "GuangDong",
      "ST": "ShenZhen",
      "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 admin-csr.json | cfssljson -bare admin

#拷贝证书
scp /root/TLS/k8s/admin*.pem 10.10.100.101:/opt/kubernetes/ssl/
scp /root/TLS/k8s/admin*.pem 10.10.100.102:/opt/kubernetes/ssl/
scp /root/TLS/k8s/admin*.pem 10.10.100.103:/opt/kubernetes/ssl/

6.5.2 生成kubeconfig文件

mkdir /root/.kube
cd /opt/kubernetes/ssl/
KUBE_CONFIG="/root/.kube/config"
KUBE_APISERVER="https://10.10.100.188:6443"

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}

6.5.3 验证查看

kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok                  
controller-manager   Healthy   ok                  
etcd-0               Healthy   {"health":"true"}   
etcd-2               Healthy   {"health":"true"}   
etcd-1               Healthy   {"health":"true"}

6.5.4 授权kubelet-bootstrap用户允许请求证书

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

7、Worker Node部署

如下操作还是在master操作

7.1 部署kubelet

7.1.1 创建配置文件

cat > /opt/kubernetes/cfg/kubelet.conf << EOF
KUBELET_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/opt/kubernetes/logs \\
--hostname-override=k8s-master1 \\
--network-plugin=cni \\
--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 \\
--pod-infra-container-image=lizhenliang/pause-amd64:3.0"
EOF

•--hostname-override：显示名称，集群中唯一
•--network-plugin：启用CNI
•--kubeconfig：空路径，会自动生成，后面用于连接apiserver
•--bootstrap-kubeconfig：首次启动向apiserver申请证书
•--config：配置参数文件
•--cert-dir：kubelet证书生成目录
•--pod-infra-container-image：管理Pod网络容器的镜像

7.1.2 创建参数文件

cat > /opt/kubernetes/cfg/kubelet-config.yml << EOF
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 0.0.0.0
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS:
- 10.0.0.2
clusterDomain: cluster.local 
failSwapOn: false
authentication:
  anonymous:
    enabled: false
  webhook:
    cacheTTL: 2m0s
    enabled: true
  x509:
    clientCAFile: /opt/kubernetes/ssl/ca.pem 
authorization:
  mode: Webhook
  webhook:
    cacheAuthorizedTTL: 5m0s
    cacheUnauthorizedTTL: 30s
evictionHard:
  imagefs.available: 15%
  memory.available: 100Mi
  nodefs.available: 10%
  nodefs.inodesFree: 5%
maxOpenFiles: 1000000
maxPods: 110
EOF

7.1.3 生成kubectl初次加入集群引导kubeconfig文件

KUBE_CONFIG="/opt/kubernetes/cfg/bootstrap.kubeconfig"
KUBE_APISERVER="https://10.10.100.188:6443" 
TOKEN="9deea7a5a8b7fa15c500a4dac68209c8"
 
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}

7.1.4 创建启动文件

cat > /lib/systemd/system/kubelet.service << EOF
[Unit]
Description=Kubernetes Kubelet
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
systemctl daemon-reload
systemctl start kubelet  && systemctl enable kubelet

7.1.5 批准kubelet证书申请并加入集群

root@k8s-master1:~# kubectl get csr
NAME                                                   AGE   SIGNERNAME                                    REQUESTOR           REQUESTEDDURATION   CONDITION
node-csr-bKoDAsJAuVMRzElq3WcabiL2yRTmMEk6QmQ-VR2VYc0   10s   kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   <none>              Pending

kubectl certificate approve node-csr-bKoDAsJAuVMRzElq3WcabiL2yRTmMEk6QmQ-VR2VYc0

7.1.6 查看节点信息

root@k8s-master1:~# kubectl get node
NAME          STATUS     ROLES    AGE     VERSION
k8s-master1   NotReady   <none>   21m     v1.20.13
k8s-master2   NotReady   <none>   9m8s    v1.20.13
k8s-master3   NotReady   <none>   8m49s   v1.20.13

7.2 部署kube-proxy

7.2.1 创建配置文件

cat > /opt/kubernetes/cfg/kube-proxy.conf << EOF
KUBE_PROXY_OPTS="--logtostderr=false \\
--v=2 \\
--log-dir=/opt/kubernetes/logs \\
--config=/opt/kubernetes/cfg/kube-proxy-config.yml"
EOF

7.2.2 创建参数文件

cat > /opt/kubernetes/cfg/kube-proxy-config.yml << EOF
kind: KubeProxyConfiguration
apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
metricsBindAddress: 0.0.0.0:10249
clientConnection:
  kubeconfig: /opt/kubernetes/cfg/kube-proxy.kubeconfig
hostnameOverride: k8s-master1
clusterCIDR: 10.244.0.0/16
EOF

#
hostnameOverride 修改为对应主机名

7.2.3 生成证书

cd ~/TLS/k8s
cat > kube-proxy-csr.json << EOF
{
  "CN": "system:kube-proxy",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "GuangDong",
      "ST": "ShenZhen",
      "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

#拷贝证书文件
scp kube-proxy*.pem 10.10.100.101:/opt/kubernetes/ssl/
scp kube-proxy*.pem 10.10.100.102:/opt/kubernetes/ssl/
scp kube-proxy*.pem 10.10.100.103:/opt/kubernetes/ssl/

7.2.4 生成kube-proxy.kubeconfig文件

cd /opt/kubernetes/ssl/

KUBE_CONFIG="/opt/kubernetes/cfg/kube-proxy.kubeconfig"
KUBE_APISERVER="https://10.10.100.188:6443"

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}

7.2.5 创建启动文件

cat > /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
systemctl daemon-reload
systemctl start kube-proxy  && systemctl enable kube-proxy

7.3 部署calico网络组件

以下步骤只在master01操作
Calico是一个纯三层的数据中心网络方案，是目前Kubernetes主流的网络方案。

#下载yaml文件
 wget https://docs.projectcalico.org/manifests/calico.yaml
#启用
 kubectl apply -f calico.yaml
kubectl get pods -A
NAMESPACE     NAME                                       READY   STATUS    RESTARTS   AGE
kube-system   calico-kube-controllers-7c968d79b6-4wvxs   1/1     Running   0          7m58s
kube-system   calico-node-55ndv                          1/1     Running   0          7m58s
kube-system   calico-node-mmcmk                          1/1     Running   0          7m58s
kube-system   calico-node-rm7lc                          1/1     Running   3          7m58s
root@k8s-master1:~# kubectl get node
NAME          STATUS   ROLES    AGE   VERSION
k8s-master1   Ready    <none>   45m   v1.20.13
k8s-master2   Ready    <none>   33m   v1.20.13
k8s-master3   Ready    <none>   33m   v1.20.13

7.4 或者部署Flanne网络组件

7.4.1 部署CNI网络

CNI二进制包下载地址：
https://github.com/containernetworking/plugins/releases

v1.0.1下载链接：
https://github.com/containernetworking/plugins/releases/download/v1.0.1/cni-plugins-linux-amd64-v1.0.1.tgz

7.4.2 解压并安装CNI

#下载CNI二进制安装包
cd /opt/k8s/package
wget https://github.com/containernetworking/plugins/releases/download/v1.0.1/cni-plugins-linux-amd64-v1.0.1.tgz

#创建配置目录
mkdir /opt/cni/bin /etc/cni/net.d -p
tar xf cni-plugins-linux-amd64-v1.0.1.tgz -C /opt/cni/bin

#将CNI配置上传到每个Node
scp -r /opt/cni/ 10.10.100.102:/opt/
scp -r /opt/cni/ 10.10.100.103:/opt/
scp -r /opt/cni/ 10.10.100.107:/opt/
scp -r /opt/cni/ 10.10.100.108/opt/
scp -r /opt/cni/ 10.10.100.108:/opt/
scp -r /opt/cni/ 10.10.100.109:/opt/

#确保kubelet启用CNI
cat /opt/kubernetes/cfg/kubelet.conf 
--network-plugin=cni

7.4.3 安装flannel网络插件

wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

kubectl apply -f kube-flannel.yml

7.5 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

7.6 添加其他node节点

7.6.1 创建工作目录并拷贝二进制文件及配置文件

从master节点拷贝到所有node节点


#拷贝二进制包
cd ~/kubernetes/server/bin/ 
scp kubelet kube-proxy root@10.10.100.107:/opt/kubernetes/bin 
scp kubelet kube-proxy root@10.10.100.108:/opt/kubernetes/bin 
scp kubelet kube-proxy root@10.10.100.109:/opt/kubernetes/bin 

#拷贝k8s所有配置
scp -r /opt/kubernetes root@10.10.100.107:/opt/
scp -r /opt/kubernetes root@10.10.100.108:/opt/
scp -r /opt/kubernetes root@10.10.100.109:/opt/

#拷贝启动文件
scp -r /lib/systemd/system/{kubelet,kube-proxy}.service root@10.10.100.107:/lib/systemd/system
scp -r /lib/systemd/system/{kubelet,kube-proxy}.service root@10.10.100.108:/lib/systemd/system
scp -r /lib/systemd/system/{kubelet,kube-proxy}.service root@10.10.100.109:/lib/systemd/system

7.6.2 删除对应文件

在刚拷贝的node节点操作

rm -f /opt/kubernetes/cfg/kubelet.kubeconfig 
rm -f /opt/kubernetes/ssl/kubelet*

#注：这几个文件是证书申请审批后自动生成的，每个Node不同，必须删除

7.6.3 生成kubectl连接集群的证书

需要安装cfssl，安装参考5.1
在node1节点操作

cd /opt/kubernetes/ssl
cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF
cat > admin-csr.json <<EOF
{
  "CN": "admin",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "GuangDong",
      "ST": "ShenZhen",
      "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

#拷贝证书到其他节点
scp /opt/kubernetes/ssl/admin*.pem 10.10.100.108:/opt/kubernetes/ssl/
scp /opt/kubernetes/ssl/admin*.pem 10.10.100.109:/opt/kubernetes/ssl/

7.6.4 生成kubeconfig文件

mkdir /root/.kube

KUBE_CONFIG="/root/.kube/config"
KUBE_APISERVER="https://10.10.100.188:6443"

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}

#查看集群状态
kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
controller-manager   Healthy   ok                  
scheduler            Healthy   ok                  
etcd-0               Healthy   {"health":"true"}   
etcd-2               Healthy   {"health":"true"}   
etcd-1               Healthy   {"health":"true"}

7.6.5 修改配置文件主机名

vim /opt/kubernetes/cfg/kubelet.conf
--hostname-override=k8s-node1

vim /opt/kubernetes/cfg/kube-proxy-config.yml
hostnameOverride: k8s-node1

#修改成对应node节点的主机名

7.6.6 启动kubelet kube-proxy

systemctl daemon-reload
systemctl start kubelet kube-proxy  && systemctl enable kubelet kube-proxy

7.6.7 在Master上批准新Node kubelet证书申请

#查看请求
kubectl get csr
NAME                                                   AGE   SIGNERNAME                                    REQUESTOR           CONDITION
node-csr-LxU_i-sMmkHdLTBp85yTRHGhvrdAmWhQeXXn-flh7aU   73m   kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Pending
node-csr-Tr4RBOFVI_OsLzpyzFVVVNFjKfUoTGzTWBBqIYWiBY8   26s   kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Pending
node-csr-aQ1l1Uz99tJXcg_Fu-by290QCuNg5MNGwnz9dO0SnpE   38m   kubernetes.io/kube-apiserver-client-kubelet   kubelet-bootstrap   Pending

#批准请求
kubectl certificate approve node-csr-Tr4RBOFVI_OsLzpyzFVVVNFjKfUoTGzTWBBqIYWiBY8 
kubectl certificate approve node-csr-LxU_i-sMmkHdLTBp85yTRHGhvrdAmWhQeXXn-flh7aU
kubectl certificate approve node-csr-aQ1l1Uz99tJXcg_Fu-by290QCuNg5MNGwnz9dO0SnpE

7.7 查看节点状态

root@k8s-master1:~# kubectl get nodes
NAME          STATUS   ROLES    AGE     VERSION
k8s-master1   Ready    <none>   2d15h   v1.20.13
k8s-master2   Ready    <none>   2d15h   v1.20.13
k8s-master3   Ready    <none>   2d15h   v1.20.13
k8s-node1     Ready    <none>   12m     v1.20.13
k8s-node2     Ready    <none>   8m50s   v1.20.13
k8s-node3     Ready    <none>   77s     v1.20.13

8、部署Dashboard

8.1 下载部署

#下载
cd /opt/kubernetes/dashboard
wget https://raw.githubusercontent.com/kubernetes/dashboard/v2.4.0/aio/deploy/recommended.yaml

#启动
mv recommended.yaml  dashboard.yaml
kubectl apply -f dashboard.yaml

#将ClusterIP修改为NodePort
kubectl edit svc kubernetes-dashboard -n kubernetes-dashboard
type: ClusterIP #修改为NodePort

kubectl edit svc dashboard-metrics-scraper -n kubernetes-dashboard
type: ClusterIP #修改为NodePort

#创建cluster-admin管理员集群角色：
cat > dashboard-adminuser.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

#启动
kubectl apply -f dashboard-adminuser.yaml


# 获取用户Token
kubectl -n kubernetes-dashboard describe secret $(kubectl -n kubernetes-dashboard get secret | grep admin-user | awk '{print $1}')

8.2 访问

访问地址：https://NodeIP:30001

在这里插入图片描述

9、部署CoreDNS

9.1 coredns.yaml

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
---
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
        kubernetes cluster.local in-addr.arpa ip6.arpa {
            pods insecure
            upstream
            fallthrough in-addr.arpa ip6.arpa
        }
        prometheus :9153
        proxy . /etc/resolv.conf
        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
      annotations:
        seccomp.security.alpha.kubernetes.io/pod: 'docker/default'
    spec:
      serviceAccountName: coredns
      tolerations:
        - key: node-role.kubernetes.io/master
          effect: NoSchedule
        - key: "CriticalAddonsOnly"
          operator: "Exists"
      containers:
      - name: coredns
        image: lizhenliang/coredns:1.2.2
        imagePullPolicy: IfNotPresent
        resources:
          limits:
            memory: 170Mi
          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
        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: 10.0.0.2 
  ports:
  - name: dns
    port: 53
    protocol: UDP
  - name: dns-tcp
    port: 53
    protocol: TCP

9.2 启动

kubectl apply -f coredns.yaml

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cwy_linux

@cwyxf123

已为社区贡献1条内容

二进制安装kubernets 1.20

cwy_linux

1、基础环境准备

1.1 服务器环境

2、 反向代理

2.1 keepalived安装配置

2.1.1 安装

2.1.2 配置

2.2 haproxy安装配置

2.2.1 安装

2.2.3 配置文件

2.2.4 修改内核参数

3、安装 harbor

4、二进制部署k8s

4.1 系统初始化

5、部署etcd集群

5.1 准备cfssl 证书生成工具

5.2 生成Etcd证书

5.2.1 自签CA证书

5.2.2 签发ETCD证书

5.3 下载安装etcd集群

5.3.1 下载etcd二进制文件

5.3.2 配置文件准备

5.3.3 拷贝刚生成的证书文件

5.3.4 将节点1的所有etcd文件拷贝到其他节点

5.3.5 修改node2,node3节点etcd.conf配置文件

5.3.6 启动并验证etcd集群信息

6、 Master 部署

6.1 安装docker

6.2 kube-apiserver 部署

6.2.1 生成kube-apiserver 证书

6.2.1.1 自签CA证书

6.2.1.2 签发kube-apiserver HTTPS证书

6.2.2 下载k8s二进制文件

6.2.3 部署kube-apiserver

6.2.3.1 创建kube-apiserver配置文件

6.2.3.2 拷贝证书

6.2.3.2 启用TLS Bootstrapping 机制

6.2.3.2 配置启动文件

6.3 部署kube-controller-manager

6.3.1 创建配置文件

6.3.2 生成kube-controller-manager证书

6.3.3 生成kubeconfig文件

6.3.4 配置启动文件

6.4 部署kube-scheduler

6.4.1 生成kube-scheduler证书

6.4.2 创建配置文件

6.4.3 生成kubeconfig文件

6.4.4 配置启动文件

6.5 查看集群状态

6.5.1 生成kubectl连接集群的证书

6.5.2 生成kubeconfig文件

6.5.3 验证查看

6.5.4 授权kubelet-bootstrap用户允许请求证书

7、Worker Node部署

7.1 部署kubelet

7.1.1 创建配置文件

7.1.2 创建参数文件

7.1.3 生成kubectl初次加入集群引导kubeconfig文件

7.1.4 创建启动文件

7.1.5 批准kubelet证书申请并加入集群

7.1.6 查看节点信息

7.2 部署kube-proxy

7.2.1 创建配置文件

7.2.2 创建参数文件

7.2.3 生成证书

7.2.4 生成kube-proxy.kubeconfig文件

7.2.5 创建启动文件

7.3 部署calico网络组件

7.4 或者部署Flanne网络组件

7.4.1 部署CNI网络

7.4.2 解压并安装CNI

7.4.3 安装flannel网络插件

7.5 授权apiserver访问kubelet

7.6 添加其他node节点

7.6.1 创建工作目录并拷贝二进制文件及配置文件

7.6.2 删除对应文件

7.6.3 生成kubectl连接集群的证书

7.6.4 生成kubeconfig文件

7.6.5 修改配置文件主机名

2、反向代理