Kubernetes平臺環境規劃

部署環境

負載均衡
Nginx1:192.168.13.128/24
Nginx2:192.168.13.129/24
Master節點
master1:192.168.13.131/24 kube-apiserver kube-controller-manager kube-scheduler etcd
master2:192.168.13.130/24 kube-apiserver kube-controller-manager kube-scheduler etcd
Node節點
node1:192.168.13.132/24 kubelet kube-proxy docker flannel etcd
node2:192.168.13.133/24 kubelet kube-proxy docker flannel etcd

Kubernetes單節點部署步驟

1：自籤ETCD證書 
2：ETCD部署 
3：Node安裝docker 
4：Flannel部署（先寫入子網到etcd）
-----------master---------------------------
5：自籤APIServer證書 
6：部署APIServer組件（token，csv）
7：部署controller-manager（指定apiserver證書）和scheduler組件 
-------------node----------------------------------
8：生成kubeconfig（bootstrap，kubeconfig和kube-proxy.kubeconfig）
9：部署kubelet組件
10：部署kube-proxy組件
---------------加入羣集-----------------
11：kubectl get csr && kubectl certificate approve 允許辦法證書，加入羣集
12：添加一個node節點
13：查看kubectl get node 節點

一，etcd證書及flannel網絡部署

1，在master01中自籤ETCD證書

[root@master01 ~]# mkdir k8s
[root@master01 ~]# cd k8s/
[root@master01 k8s]# rz -E  ##上傳etcd腳本
[root@master01 k8s]# ls
etcd-cert.sh  etcd.sh

vim etcd-cert.sh  ##證書創建腳本內容
cat > ca-config.json <<EOF
{
    "signing": {
        "default": {
            "expiry": "87600h"
        },
        "profiles": {
            "www": {
                 "expiry": "87600h",
                 "usages": [
                        "signing",
                        "key encipherment",
                        "server auth",
                        "client auth"
                ]
            }
        }
    }
}
EOF

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

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

#-----------------------

cat > server-csr.json <<EOF
{
        "CN": "etcd",
        "hosts": [
        "10.206.240.188",
        "10.206.240.189",
        "10.206.240.111"
        ],
        "key": {
                "algo": "rsa",
                "size": 2048
        },
        "names": [
                {
                        "C": "CN",
                        "L": "BeiJing",
                        "ST": "BeiJing"
                }
        ]
}
EOF

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

vim etcd.sh ##etcd服務腳本
#!/bin/bash
# example: ./etcd.sh etcd01 192.168.1.10 etcd02=https://192.168.1.11:2380,etcd03=https://192.168.1.12:2380

ETCD_NAME=$1
ETCD_IP=$2
ETCD_CLUSTER=$3

WORK_DIR=/opt/etcd

cat <<EOF >$WORK_DIR/cfg/etcd
#[Member]
ETCD_NAME="${ETCD_NAME}"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://${ETCD_IP}:2380"
ETCD_LISTEN_CLIENT_URLS="https://${ETCD_IP}:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://${ETCD_IP}:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://${ETCD_IP}:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://${ETCD_IP}:2380,${ETCD_CLUSTER}"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

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

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

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable etcd
systemctl restart etcd

[root@master01 k8s]# mkdir etcd-cert   ##創建證書目錄
[root@master01 k8s]# mv etcd-cert.sh etcd-cert   ##將腳本放到目錄中
[root@master01 k8s]# vim cfssl.sh   ##工具下載腳本
curl -L https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -o /usr/local/bin/cfssl
curl -L https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -o /usr/local/bin/cfssljson
curl -L https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -o /usr/local/bin/cfssl-certinfo
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson /usr/local/bin/cfssl-certinfo
[root@master01 k8s]# bash cfssl.sh  ##下載cfssl官方包
[root@master01 k8s]# ls /usr/local/bin/
cfssl  cfssl-certinfo  cfssljson
##cfssl生成證書工具、cfssljson通過傳入json文件生成證書、cfssl-certinfo查看證書信息
[root@master01 k8s]# cd /root/k8s/etcd-cert/  ##切換到證書腳本目錄下
[root@master01 etcd-cert]# ls
etcd-cert.sh

##定義ca證書
[root@master01 etcd-cert]# cat > ca-config.json <<EOF
{
    "signing": {
        "default": {
            "expiry": "87600h"
        },
        "profiles": {
            "www": {
                 "expiry": "87600h",
                 "usages": [
                        "signing",
                        "key encipherment",
                        "server auth",
                        "client auth"     
                ]  
            } 
        }         
    }
}
EOF

##實現證書的簽名
[root@master01 etcd-cert]# cat > ca-csr.json <<EOF 
 {   
        "CN": "etcd CA",
        "key": {
                 "algo": "rsa",
                 "size": 2048
         },
         "names": [
                 {
                         "C": "CN",
                         "L": "Beijing",
                         "ST": "Beijing"
                 }
         ]
 }
 EOF

[root@master01 etcd-cert]# ls
ca-config.json  ca-csr.json  etcd-cert.sh
[root@master01 etcd-cert]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -  
##生產證書，生成ca-key.pem  ca.pem
2020/02/09 18:09:13 [INFO] generating a new CA key and certificate from CSR
2020/02/09 18:09:13 [INFO] generate received request
2020/02/09 18:09:13 [INFO] received CSR
2020/02/09 18:09:13 [INFO] generating key: rsa-2048
2020/02/09 18:09:13 [INFO] encoded CSR
2020/02/09 18:09:13 [INFO] signed certificate with serial number 443437184464842782624738198723332409563005728279
[root@master01 etcd-cert]# ls
ca-config.json  ca.csr  ca-csr.json  ca-key.pem  ca.pem  etcd-cert.sh

##指定etcd三個節點之間的通信驗證
[root@master01 etcd-cert]#cat > server-csr.json <<EOF
{
        "CN": "etcd",
        "hosts": [
        "192.168.13.131",    ##三個主機的地址
        "192.168.13.132",
        "192.168.13.133"
        ],
        "key": {
                "algo": "rsa",
                "size": 2048
        },
        "names": [
                {
                        "C": "CN",
                        "L": "BeiJing",
                        "ST": "BeiJing"
                }
        ]
}
EOF

[root@master01 etcd-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
##生成ETCD證書 server-key.pem   server.pem

2，在master01和node節點上部署etcd

[root@master01 etcd-cert]# cd /root/k8s/
[root@master01 k8s]# rz -E   ##將源碼包放到k8s目錄下
[root@master01 k8s]# ls
etcd-cert                        flannel-v0.10.0-linux-amd64.tar.gz
etcd.sh                          kubernetes-server-linux-amd64.tar.gz
etcd-v3.3.10-linux-amd64.tar.gz
[root@master01 k8s]# tar zxvf etcd-v3.3.10-linux-amd64.tar.gz ##解壓
[root@master01 k8s]# cd etcd-v3.3.10-linux-amd64/
[root@master01 etcd-v3.3.10-linux-amd64]# ls
Documentation  etcd  etcdctl  README-etcdctl.md  README.md  READMEv2-etcdctl.md
[root@master01 etcd-v3.3.10-linux-amd64]# mkdir /opt/etcd/{cfg,bin,ssl} -p  
##創建配置文件，命令文件，證書工作目錄
[root@master01 etcd-v3.3.10-linux-amd64]# mv etcd etcdctl /opt/etcd/bin/  ##放置命令
[root@master01 etcd-v3.3.10-linux-amd64]# cd ../etcd-cert/
[root@master01 etcd-cert]# cp *.pem /opt/etcd/ssl/   ##證書拷貝
[root@master01 etcd-cert]# ls /opt/etcd/ssl/
ca-key.pem  ca.pem  server-key.pem  server.pem
[root@master01 etcd-cert]# cd ../
[root@master01 k8s]# bash etcd.sh etcd01 192.168.13.131 etcd02=https://192.168.13.132:2380,etcd03=https://192.168.13.133:2380
##執行etcd.sh服務腳本，進入卡住狀態等待其他節點加入
[root@master01 ~]# ps -ef | grep etcd
##使用另外一個會話打開，會發現etcd進程已經開啓
[root@master01 ~]# systemctl stop firewalld.service  ##關閉防火牆
[root@master01 ~]# setenforce 0
#######node節點的防火牆也需要關閉
[root@node01 ~]# systemctl stop firewalld.service  ##關閉防火牆
[root@node01 ~]# setenforce 0
#########
[root@master01 k8s]# scp -r /opt/etcd/ [email protected]:/opt    ##拷貝證書去其他node節點
[root@master01 k8s]# scp -r /opt/etcd/ [email protected]:/opt
##啓動腳本拷貝其他node節點
[root@master01 k8s]# scp /usr/lib/systemd/system/etcd.service [email protected]:/usr/lib/systemd/system/ 
[root@master01 k8s]# scp /usr/lib/systemd/system/etcd.service [email protected]:/usr/lib/systemd/system/
#########修改node01的etcd配置文件#########
[root@node01 ~]# vim /opt/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd02"   ##修改名稱
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.13.132:2380"   ##地址
ETCD_LISTEN_CLIENT_URLS="https://192.168.13.132:2379"   ##地址修改

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.13.132:2380"  ##地址修改
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.13.132:2379"   ##地址修改
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.13.131:2380,etcd02=https://192.168.13.132:2380,etcd03=https://192.168.13.133:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
#########修改node02的etcd配置文件#########
[root@node02 ~]# vim /opt/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd03"   ##修改名稱
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.13.133:2380"   ##修改地址
ETCD_LISTEN_CLIENT_URLS="https://192.168.13.133:2379"   ##修改地址

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.13.133:2380"   ##修改地址
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.13.133:2379"    ##修改地址
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.13.131:2380,etcd02=https://192.168.13.132:2380,etcd03=https://192.168.13.133:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
#########在master01上啓動腳本等待節點加入#########
[root@master01 k8s]# bash etcd.sh etcd01 192.168.13.131 etcd02=https://192.168.13.132:2380,etcd03=https://192.168.13.133:2380
#########在node上啓動etcd服務#########
[root@node01 ~]# systemctl start etcd.service   
[root@node02 ~]# systemctl start etcd.service
#########在master01上檢查羣集狀態#########
[root@master01 k8s]# cd etcd-cert/   ##切換到證書的目錄下
[root@master01 etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.13.131:2379,https://192.168.13.132:2379,https://192.168.13.133:2379" cluster-health
##檢查羣集狀態
member 76e0a15c7cd72ef7 is healthy: got healthy result from https://192.168.13.133:2379
member cbcfa6e700d4aa11 is healthy: got healthy result from https://192.168.13.132:2379
member e4f560fae6a18df3 is healthy: got healthy result from https://192.168.13.131:2379
cluster is healthy

3，在所有的node節點上安裝docker

[root@node01 ~]# yum install -y yum-utils device-mapper-persistent-data lvm2  ##安裝依賴包
[root@node01 ~]# yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
##設置阿里雲鏡像源
[root@node01 ~]# yum install -y docker-ce  ##安裝docker
[root@node01 ~]# systemctl start docker.service
[root@node01 ~]# systemctl enable docker.service
[root@node01 ~]# tee /etc/docker/daemon.json <<-'EOF'   ##容器加速
 {
     "registry-mirrors": ["https://3a9s8zx5.mirror.aliyuncs.com"]
 }
 EOF
[root@node01 ~]# systemctl daemon-reload   ##重載
[root@node01 ~]# systemctl restart docker
[root@node01 ~]# vim /etc/sysctl.conf 
net.ipv4.ip_forward=1  ##開啓路由轉發
[root@node01 ~]# sysctl -p   ##重載
[root@node01 ~]# service network restart 
[root@node01 ~]# systemctl restart docker

4，在所有node上部署flannel網絡

[root@master01 etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.13.131:2379,https://192.168.13.132:2379,https://192.168.13.133:2379" set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'
##寫入分配的子網段到ETCD中，供flannel使用，網絡爲172.17.0.0
[root@master01 etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.13.131:2379,https://192.168.13.132:2379,https://192.168.13.133:2379" get /coreos.com/network/config
##get查看寫入的信息
[root@master01 etcd-cert]# cd ../
##拷貝到所有node節點（只需要部署在node節點即可）
[root@master01 k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz [email protected]:/root  
[root@master01 k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz [email protected]:/root
#########在所有node節點上部署安裝flannel###########
[root@node01 ~]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz ##解壓
flanneld
mk-docker-opts.sh
README.md
[root@node01 ~]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p
[root@node01 ~]# mv mk-docker-opts.sh flanneld /opt/kubernetes/bin/
[root@node01 ~]# rz -E  ##上傳flannel腳本文件

vim flannel.sh   ##編輯flannel配置文件個啓動服務的腳本

#!/bin/bash

ETCD_ENDPOINTS=${1:-"http://127.0.0.1:2379"}

cat <<EOF >/opt/kubernetes/cfg/flanneld

FLANNEL_OPTIONS="--etcd-endpoints=${ETCD_ENDPOINTS} \
-etcd-cafile=/opt/etcd/ssl/ca.pem \
-etcd-certfile=/opt/etcd/ssl/server.pem \
-etcd-keyfile=/opt/etcd/ssl/server-key.pem"

EOF

cat <<EOF >/usr/lib/systemd/system/flanneld.service
[Unit]
Description=Flanneld overlay address etcd agent
After=network-online.target network.target
Before=docker.service

[Service]
Type=notify
EnvironmentFile=/opt/kubernetes/cfg/flanneld
ExecStart=/opt/kubernetes/bin/flanneld --ip-masq \$FLANNEL_OPTIONS
ExecStartPost=/opt/kubernetes/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/subnet.env
Restart=on-failure

[Install]
WantedBy=multi-user.target

EOF

systemctl daemon-reload
systemctl enable flanneld
systemctl restart flanneld

[root@node01 ~]# bash flannel.sh https://192.168.13.131:2379,https://192.168.13.132:2379,https://192.168.13.133:2379
##開啓flannel網絡功能
[root@node01 ~]# vim /usr/lib/systemd/system/docker.service  ##修改服務啓動文件
 13 # for containers run by docker
 14 EnvironmentFile=/run/flannel/subnet.env  ##添加此項
 15 ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/ru    n/containerd/containerd.sock  
 ##引用參數
[root@node01 ~]# cat /run/flannel/subnet.env  ##查看子網段信息
DOCKER_OPT_BIP="--bip=172.17.45.1/24"
DOCKER_OPT_IPMASQ="--ip-masq=false"
DOCKER_OPT_MTU="--mtu=1450"
DOCKER_NETWORK_OPTIONS=" --bip=172.17.45.1/24 --ip-masq=false --mtu=1450"
[root@node01 ~]# systemctl daemon-reload   ##重載docker
[root@node01 ~]# systemctl restart docker
[root@node01 ~]# ifconfig  ##此時docker0網關爲172.17.45.1，flannel是虛擬網絡
[root@node01 ~]# docker run -it centos:7 /bin/bash   ##安裝centos7並進入容器
[root@720f2727f307 /]# yum install net-tools -y  ##安裝網絡工具
[root@720f2727f307 /]# ifconfig  ##容器的地址爲172.17.45.2
##############node2和node1一樣的配置##############
##node2的docker0地址爲172.17.1.1
[root@node02 ~]# docker run -it centos:7 /bin/bash  ##開啓容器並進入容器
[root@c2cfc9af3b9f /]# yum install -y net-tools
[root@c2cfc9af3b9f /]# ifconfig   ##容器地址爲172.17.1.2
[root@c2cfc9af3b9f /]# ping 172.17.45.2  ##測試flannel網絡是否互通

二，部署master01節點上 apiserver，kube-controller-manager，kube-scheduler三個組件

1，自籤APIServer證書

[root@master01 k8s]# rz -E  ##上傳master腳本壓縮包
[root@master01 k8s]# ls
master.zip
[root@master01 k8s]# unzip master.zip   ##解壓
Archive:  master.zip
    inflating: apiserver.sh            
    inflating: controller-manager.sh   
    inflating: scheduler.sh
[root@master01 k8s]# chmod +x controller-manager.sh  ##給執行權限
[root@master01 k8s]# mkdir k8s-cert  ##apiserver自簽證書目錄
[root@master01 k8s]# cd k8s-cert/
[root@master01 k8s-cert]# rz -E
[root@master01 k8s-cert]# ls   ##上傳k8s證書腳本
k8s-cert.sh

vim k8s-cert.sh    ##api證書腳本
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": "Beijing",
                        "ST": "Beijing",
                        "O": "k8s",
                        "OU": "System"
                }
        ]
}
EOF

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

#-----------------------

cat > server-csr.json <<EOF
{
        "CN": "kubernetes",
        "hosts": [
            "10.0.0.1",
            "127.0.0.1",
            "192.168.13.131",  //master1
            "192.168.13.130",  //master2
            "192.168.13.100",  //vip 公共訪問入口
            "192.168.13.128",  //lb負載均衡 （master）
            "192.168.13.129",  //lb負載均衡（backup）
            "kubernetes",
            "kubernetes.default",
            "kubernetes.default.svc",
            "kubernetes.default.svc.cluster",
            "kubernetes.default.svc.cluster.local"
        ],
        "key": {
                "algo": "rsa",
                "size": 2048
        },
        "names": [
                {
                        "C": "CN",
                        "L": "BeiJing",
                        "ST": "BeiJing",
                        "O": "k8s",
                        "OU": "System"
                }
        ]
}
EOF

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

#-----------------------

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

#-----------------------

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

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

[root@master01 k8s-cert]# bash k8s-cert.sh   ##執行腳本
[root@master01 k8s-cert]# ls *pem   ##生成8個證書
admin-key.pem  ca-key.pem  kube-proxy-key.pem  server-key.pem
admin.pem      ca.pem      kube-proxy.pem      server.pem
[root@master01 k8s-cert]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p   ##創建工作目錄
[root@master01 k8s-cert]# cp ca*pem server*pem /opt/kubernetes/ssl/  ##證書複製到工作目錄

2，部署APIServer組件（token，csv）

[root@master01 k8s-cert]# cd ..
[root@master01 k8s]# tar zxvf kubernetes-server-linux-amd64.tar.gz   ##解壓
[root@master01 k8s]# cd kubernetes/server/bin/   ##查看工具
[root@master01 bin]# ls
apiextensions-apiserver              kube-controller-manager.tar
cloud-controller-manager             kubectl
cloud-controller-manager.docker_tag  kubelet
cloud-controller-manager.tar         kube-proxy
hyperkube                            kube-proxy.docker_tag
kubeadm                              kube-proxy.tar
kube-apiserver                       kube-scheduler
kube-apiserver.docker_tag            kube-scheduler.docker_tag
kube-apiserver.tar                   kube-scheduler.tar
kube-controller-manager              mounter
kube-controller-manager.docker_tag
[root@master01 bin]# cp kube-apiserver kubectl kube-scheduler kube-controller-manager /opt/kubernetes/bin/
##將master的組件拷貝到工作目錄下
[root@master01 bin]# head -c 16 /dev/urandom | od -An -t x | tr -d ' '  ##隨機生成序列號
b555625c736044a609cf020902e773fa
[root@master01 bin]# vim /opt/kubernetes/cfg/token.csv  ##編輯token角色
b555625c736044a609cf020902e773fa,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
##序列號，用戶名，id，角色

vim /root/k8s/apiserver.sh  ##查看apiserver腳本
#!/bin/bash

MASTER_ADDRESS=$1
ETCD_SERVERS=$2

cat <<EOF >/opt/kubernetes/cfg/kube-apiserver

KUBE_APISERVER_OPTS="--logtostderr=true \\
--v=4 \\
--etcd-servers=${ETCD_SERVERS} \\
--bind-address=${MASTER_ADDRESS} \\
--secure-port=6443 \\
--advertise-address=${MASTER_ADDRESS} \\
--allow-privileged=true \\
--service-cluster-ip-range=10.0.0.0/24 \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,Res    ourceQuota,NodeRestriction \\
--authorization-mode=RBAC,Node \\
--kubelet-https=true \\
--enable-bootstrap-token-auth \\
--token-auth-file=/opt/kubernetes/cfg/token.csv \\
--service-node-port-range=30000-50000 \\
--tls-cert-file=/opt/kubernetes/ssl/server.pem  \\
--tls-private-key-file=/opt/kubernetes/ssl/server-key.pem \\
--client-ca-file=/opt/kubernetes/ssl/ca.pem \\
--service-account-key-file=/opt/kubernetes/ssl/ca-key.pem \\
--etcd-cafile=/opt/etcd/ssl/ca.pem \\
--etcd-certfile=/opt/etcd/ssl/server.pem \\
--etcd-keyfile=/opt/etcd/ssl/server-key.pem"

EOF

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

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

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable kube-apiserver
systemctl restart kube-apiserver

[root@master01 bin]# cd /root/k8s/
[root@master01 k8s]# bash apiserver.sh 192.168.13.131 https://192.168.13.131:2379,https://192.168.13.132:2379,https://192.168.13.133:2379
##開啓apiserver前面是本地地址，後面是etcd羣集的地址
[root@master01 k8s]# ps aux | grep kube  ##檢查進程是否啓動成功
[root@master01 k8s]# cat /opt/kubernetes/cfg/kube-apiserver  ##查看配置文件
[root@master01 k8s]# netstat -ntap | grep 6443   ##查看https的端口
tcp        0      0 192.168.13.131:6443     0.0.0.0:*               LISTEN      38191/kube-apiserve 
tcp        0      0 192.168.13.131:6443     192.168.13.131:34900    ESTABLISHED 38191/kube-apiserve 
tcp        0      0 192.168.13.131:34900    192.168.13.131:6443     ESTABLISHED 38191/kube-apiserve 
[root@master01 k8s]# netstat -ntap | grep 8080  ##查看8080端口
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      38191/kube-apiserve

3，部署controller-manager（指定apiserver證書）和scheduler組件

vim scheduler.sh   ##調度的腳本
#!/bin/bash

MASTER_ADDRESS=$1

cat <<EOF >/opt/kubernetes/cfg/kube-scheduler

KUBE_SCHEDULER_OPTS="--logtostderr=true \\
--v=4 \\
--master=${MASTER_ADDRESS}:8080 \\
--leader-elect"

EOF

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

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

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable kube-scheduler
systemctl restart kube-scheduler

[root@master01 k8s]# ./scheduler.sh 127.0.0.1  ##開啓scheduler服務

vim controller-manager.sh  ##控制管理腳本
#!/bin/bash

MASTER_ADDRESS=$1

cat <<EOF >/opt/kubernetes/cfg/kube-controller-manager

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

EOF

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

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

[Install]
WantedBy=multi-user.target
EOF

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

[root@master01 k8s]# ./controller-manager.sh 127.0.0.1 ##啓動controller-manager
[root@master01 k8s]# /opt/kubernetes/bin/kubectl get cs  ##查看master 節點狀態
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok                  
controller-manager   Healthy   ok                  
etcd-2               Healthy   {"health":"true"}   
etcd-0               Healthy   {"health":"true"}   
etcd-1               Healthy   {"health":"true"}

三，部署node節點上kubelet kube-proxy組件

1，生成kubeconfig（bootstrap，kubeconfig和kube-proxy.kubeconfig）

##在master01上操作
[root@master01 k8s]# cd kubernetes/server/bin/
##把 kubelet、kube-proxy拷貝到node節點上去
[root@master01 bin]# scp kubelet kube-proxy [email protected]:/opt/kubernetes/bin/
[root@master01 bin]# scp kubelet kube-proxy [email protected]:/opt/kubernetes/bin/
##在node節點上操作
[root@node01 ~]# rz -E  ##上傳node腳本壓縮包
[root@node01 ~]# unzip node.zip   ##解壓
Archive:  node.zip
    inflating: proxy.sh                
    inflating: kubelet.sh
##在master01上操作
[root@master01 bin]# cd /root/k8s/
[root@master01 k8s]# mkdir kubeconfig  ##創建目錄
[root@master01 k8s]# cd kubeconfig/
[root@master01 kubeconfig]# rz -E   ##上傳kubeconfig腳本
[root@master01 kubeconfig]# ls
kubeconfig.sh
[root@master01 kubeconfig]# cat /opt/kubernetes/cfg/token.csv 
b555625c736044a609cf020902e773fa,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
##複製序列號進行腳本修改

vim kubeconfig.sh  ##腳本信息
##token部分要刪除

APISERVER=$1
SSL_DIR=$2

# 創建kubelet bootstrapping kubeconfig 
export KUBE_APISERVER="https://$APISERVER:6443"

# 設置集羣參數
kubectl config set-cluster kubernetes \
    --certificate-authority=$SSL_DIR/ca.pem \
    --embed-certs=true \
    --server=${KUBE_APISERVER} \
    --kubeconfig=bootstrap.kubeconfig

# 設置客戶端認證參數
kubectl config set-credentials kubelet-bootstrap \
    --token=b555625c736044a609cf020902e773fa \   ##修改序列號
    --kubeconfig=bootstrap.kubeconfig

# 設置上下文參數
kubectl config set-context default \
    --cluster=kubernetes \
    --user=kubelet-bootstrap \
    --kubeconfig=bootstrap.kubeconfig

# 設置默認上下文
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig

#----------------------

# 創建kube-proxy kubeconfig文件

kubectl config set-cluster kubernetes \
    --certificate-authority=$SSL_DIR/ca.pem \
    --embed-certs=true \
    --server=${KUBE_APISERVER} \
    --kubeconfig=kube-proxy.kubeconfig

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

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

kubectl config use-context default --kubeconfig=kube-proxy.kubeconfig

[root@master01 kubeconfig]# vim /etc/profile  ##修改環境變量
export PATH=$PATH:/opt/kubernetes/bin/
[root@master01 kubeconfig]# source /etc/profile  ##刷新配置文件
[root@master01 kubeconfig]# bash kubeconfig 192.168.13.131 /root/k8s/k8s-cert/ ##生成配置文件
[root@master01 kubeconfig]# ls
bootstrap.kubeconfig  kubeconfig  kube-proxy.kubeconfig
[root@master01 kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig [email protected]:/opt/kubernetes/cfg/
##拷貝配置文件到node節點
[root@master01 kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig [email protected]:/opt/kubernetes/cfg/
[root@master01 kubeconfig]# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap
##創建bootstrap角色賦予權限用於連接apiserver請求籤名（關鍵）

2，部署kubelet組件

#####在node01上操作#######
vim kubelet.sh   腳本信息
#!/bin/bash

NODE_ADDRESS=$1
DNS_SERVER_IP=${2:-"10.0.0.2"}

cat <<EOF >/opt/kubernetes/cfg/kubelet

KUBELET_OPTS="--logtostderr=true \\
--v=4 \\
--hostname-override=${NODE_ADDRESS} \\
--kubeconfig=/opt/kubernetes/cfg/kubelet.kubeconfig \\
--bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig \\
--config=/opt/kubernetes/cfg/kubelet.config \\
--cert-dir=/opt/kubernetes/ssl \\
--pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0"

EOF

cat <<EOF >/opt/kubernetes/cfg/kubelet.config

kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: ${NODE_ADDRESS}
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS:
- ${DNS_SERVER_IP} 
clusterDomain: cluster.local.
failSwapOn: false
authentication:
    anonymous:
        enabled: true
EOF

cat <<EOF >/usr/lib/systemd/system/kubelet.service
[Unit]
Description=Kubernetes Kubelet
After=docker.service
Requires=docker.service

[Service]
EnvironmentFile=/opt/kubernetes/cfg/kubelet
ExecStart=/opt/kubernetes/bin/kubelet \$KUBELET_OPTS
Restart=on-failure
KillMode=process

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable kubelet
systemctl restart kubelet

[root@node01 ~]# bash kubelet.sh 192.168.13.132  ##執行腳本
[root@node01 ~]# ps aux | grep kube  ##查看服務啓動狀態
##########在master01上操作############
[root@master01 kubeconfig]# kubectl get csr ##查看證書狀態
NAME                                                   AGE   REQUESTOR           CONDITION
node-csr-PvqJh9Nza5SyPUakuwOkiMUsh7zo3ZG9vw3OTNtlkgg   73s   kubelet-bootstrap   Pending 
##等待集羣給該節點頒發證書
[root@master01 kubeconfig]# kubectl certificate approve node-csr-PvqJh9Nza5SyPUakuwOkiMUsh7zo3ZG9vw3OTNtlkgg
[root@master01 kubeconfig]# kubectl get csr  ##查看證書狀態
NAME                                                   AGE     REQUESTOR           CONDITION
node-csr-PvqJh9Nza5SyPUakuwOkiMUsh7zo3ZG9vw3OTNtlkgg   3m34s   kubelet-bootstrap   Approved,Issued
##已經被允許加入羣集
[root@master01 kubeconfig]# kubectl get node  ##查看羣集節點，成功加入node01節點
NAME             STATUS   ROLES    AGE    VERSION
192.168.13.132   Ready    <none>   115s   v1.12.3

3，部署kube-proxy組件

vim proxy.sh  ##proxy腳本
#!/bin/bash

NODE_ADDRESS=$1

cat <<EOF >/opt/kubernetes/cfg/kube-proxy

KUBE_PROXY_OPTS="--logtostderr=true \\
--v=4 \\
--hostname-override=${NODE_ADDRESS} \\
--cluster-cidr=10.0.0.0/24 \\
--proxy-mode=ipvs \\
--kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"

EOF

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

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

[Install]
WantedBy=multi-user.target
EOF

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

##在node01節點操作
[root@node01 ~]# bash proxy.sh 192.168.13.132  ##啓動proxy服務
[root@node01 ~]# systemctl status kube-proxy.service  ##查看服務狀態

4，部署node02節點

##在node01上操作
[root@node01 ~]# scp -r /opt/kubernetes/ [email protected]:/opt/  
//把現成的/opt/kubernetes目錄複製到其他節點進行修改即可
[root@node01 ~]# scp /usr/lib/systemd/system/{kubelet,kube-proxy}.service [email protected]:/usr/lib/systemd/system/
//把kubelet，kube-proxy的service文件拷貝到node2中
##在node02上操作，進行修改
[root@node02 ~]# cd /opt/kubernetes/ssl/   ##切換到證書目錄下
[root@node02 ssl]# ls
kubelet-client-2020-02-10-00-10-11.pem  kubelet.crt
kubelet-client-current.pem              kubelet.key
[root@node02 ssl]# rm -rf *    ##首先刪除複製過來的證書，等會node02會自行申請證書
[root@node02 ssl]# cd ../cfg/ ##修改配置文件kubelet  kubelet.config kube-proxy（三個配置文件）
[root@node02 cfg]# vim kubelet   
--hostname-override=192.168.13.133 \   ##修改地址
[root@node02 cfg]# vim kubelet.config
address: 192.168.13.133  ##修改地址
[root@node02 cfg]# vim kube-proxy
--hostname-override=192.168.13.133 \    ##修改地址
[root@node02 cfg]# systemctl start kubelet.service   ##啓動kubelet服務
[root@node02 cfg]# systemctl enable kubelet.service      
[root@node02 cfg]# systemctl start kube-proxy.service   ##啓動kube-proxy服務
[root@node02 cfg]# systemctl enable kube-proxy.service

四，加入羣集

##在master01上操作
[root@master01 k8s]# kubectl get csr  ##查看請求
NAME                                                   AGE    REQUESTOR           CONDITION
node-csr-PvqJh9Nza5SyPUakuwOkiMUsh7zo3ZG9vw3OTNtlkgg   23m    kubelet-bootstrap   Approved,Issued
node-csr-qE6kNPzFp6dducllhsQucd-3PJQA5t7eVf-xNkx48MA   103s   kubelet-bootstrap   Pending
[root@master01 k8s]# kubectl certificate approve node-csr-qE6kNPzFp6dducllhsQucd-3PJQA5t7eVf-xNkx48MA
//授權許可加入羣集
[root@master01 k8s]# kubectl get node  ##查看羣集中的節點
NAME             STATUS   ROLES    AGE   VERSION
192.168.13.132   Ready    <none>   21m   v1.12.3
192.168.13.133   Ready    <none>   70s   v1.12.3

Kubernetes二進制部署——單master集羣部署（1）

Kubernetes平臺環境規劃

部署環境

Kubernetes單節點部署步驟

一，etcd證書及flannel網絡部署

1，在master01中自籤ETCD證書

2，在master01和node節點上部署etcd

3，在所有的node節點上安裝docker

4，在所有node上部署flannel網絡

二，部署master01節點上 apiserver，kube-controller-manager，kube-scheduler三個組件

1，自籤APIServer證書

2，部署APIServer組件（token，csv）

3，部署controller-manager（指定apiserver證書）和scheduler組件

三，部署node節點上kubelet kube-proxy組件

1，生成kubeconfig（bootstrap，kubeconfig和kube-proxy.kubeconfig）

2，部署kubelet組件

3，部署kube-proxy組件

4，部署node02節點

四，加入羣集

單節點部署完畢，未完待續...

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Kubernetes二進制部署——單master集羣部署（1）

https://yachay.unat.edu.pe/blog/index.php?comment_area=format_blog&comment_component=blog&comment_co

linux以太網驅動總結