Kubernetes单节点部署二进制k8s群集

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Kubernetes单节点部署二进制k8s群集

#环境
| master      | 192.168.100.170 | kube-apiserver、kube-scheduler、controller-manager、etcd | 2G+4CPU  |
| node1       | 192.168.100.180 | kube-apiserver、kube-scheduler、controller-manager、etcd | 2G+4CPU  |
| node2       | 192.168.100.190 | kube-apiserver、kube-scheduler、controller-manager、etcd | 2G+4CPU  |

| etcd           | ca.pem，server.pem，server-key.pem         |
| flannel        | ca.pem，server.pem，server-key.pem         |
| kube-apiserver | ca.pem，server.pem，server-key.pem         |
| kubelet        | ca.pem，ca-key.pem                         |
| kube-proxy     | ca.pem，kube-proxy.pem,kube-proxy-key.pem |
| kubectl        | ca.pem，admin-pem，admin-key.pem           |

一: Etcd群集部署---------------------------------------------------------
hostnamectl set-hostaname master
hostnamectl set-hostaname node1
hostnamectl set-hostaname node2
iptables -F
setenforce 0

//master部署------------------------------

1.master主机创建k8s文件夹并上传etcd脚本，下载cffssl官方证书生成工具
mkdir k8s && cd k8s
//上传脚本etcd-cert.sh  etcd.sh
ls
etcd-cert.sh  etcd.sh

2.下载证书制作工具
k8s]# vim cfssl.sh
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

bash cfssl.sh
ls /usr/local/bin/
cfssl  cfssl-certinfo  cfssljson

3.开始制作证书
#cfssl 生成证书工具   cfssljson通过传入json文件生成证书 cfssl-certinfo查看证书信息
#定义ca证书
k8s]# cd etcd-cert
[root@master etcd-cert]# cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "www": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"     
        ]  
      } 
    }         
  }
}
EOF

#实现证书签名,"实现CA证书签名"
[root@master etcd-cert]# cat > ca-csr.json <<EOF
{   
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}
EOF

#生产证书,生成ca-key.pem ca.pem
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

4.指定etcd三个节点之间的通信验证,注意要修改这里的ip
cat > server-csr.json <<EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.100.170", "master地址"
    "192.168.100.180",  "node1地址"
    "192.168.100.190"   "node2地址"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}
EOF
#生成ETCD证书 server-key.pem   server.pem
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
#检查生成的证书
[root@master etcd-cert]# ls
ca-config.json  ca-csr.json  ca.pem        server.csr       server-key.pem
ca.csr          ca-key.pem   etcd-cert.sh  server-csr.json  server.pem

5.部署ETCD服务
#官网下载地址:https://github.com/etcd-io/etcd/releases
#这里选择本地上传etcd-v3.3.10-linux-amd64.tar.gz,kubernetes-server-linux-amd64.tar.gz,flannel-v0.10.0-linux-amd64.tar.gz
k8s]# ls
etcd-cert                 etcd-v3.3.10-linux-amd64.tar.gz
etcd.sh                   kubernetes-server-linux-amd64.tar.gz
etcd-v3.3.10-linux-amd64  flannel-v0.10.0-linux-amd64.tar.gz
k8s]# tar zxvf etcd-v3.3.10-linux-amd64.tar.gz
k8s]# ls etcd-v3.3.10-linux-amd64
Documentation  etcd  etcdctl  README-etcdctl.md  README.md  READMEv2-etcdctl.md
k8s]# mkdir /opt/etcd/{cfg,bin,ssl} -p ‘创建配置文件，命令文件，证书目录‘
k8s]# mv etcd-v3.3.10-linux-amd64/etcd etcd-v3.3.10-linux-amd64/etcdctl /opt/etcd/bin/                      ‘//移动命令到刚刚创建的 bin目录‘

#证书拷贝
[root@master k8s]# cp etcd-cert/*.pem /opt/etcd/ssl/    ‘//将证书文件复制到刚刚创建的ssl目录‘
[root@master k8s]# bash etcd.sh etcd01 192.168.100.170 etcd02=https://192.168.100.180:2380,etcd03=https://192.168.100.190:2380  ‘//进入卡住状态等待其他节点加入,使用另外一个终端查看‘
[root@master ~]# ps -ef | grep etcd

6.拷贝证书及启动服务脚本取其他node节点
[root@master k8s]# scp -r /opt/etcd/ root@192.168.100.180:/opt/
[root@master k8s]# scp -r /opt/etcd/ root@192.168.100.190:/opt
#拷贝服务脚本
[root@master k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.100.180:/usr/lib/systemd/system/
[root@master k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.100.190:/usr/lib/systemd/system/

//node节点部署

7.node1
#修改配置文件
[root@node01 ~]# vim /opt/etcd/cfg/etcd

#[Member]
ETCD_NAME="etcd02"   "此处修改为etcd02"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.100.180:2380"    "修改为nodde2地址"
ETCD_LISTEN_CLIENT_URLS="https://192.168.100.180:2379"  "修改为nodde2地址"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.100.180:2380" "修改为nodde2地址"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.100.180:2379"       "修改为nodde2地址"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.100.170:2380,etcd02=https://192.168.100.180:2380,etcd03=https://192.168.100.190:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

#启动etcd
[root@localhost ssl]# systemctl start etcd
[root@localhost ssl]# systemctl status etcd
[root@localhost ssl]# systemctl enable etcd

8.node2
#修改配置文件
[root@node01 ~]# vim /opt/etcd/cfg/etcd

#[Member]
ETCD_NAME="etcd03"   "此处修改为etcd03"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.100.190:2380"    "修改为nodde3地址"
ETCD_LISTEN_CLIENT_URLS="https://192.168.100.190:2379"  "修改为nodde3地址"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.100.190:2380" "修改为nodde3地址"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.100.190:2379"   "修改为nodde3地址"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.100.170:2380,etcd02=https://192.168.100.180:2380,etcd03=https://192.168.100.190:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

#启动etcd
[root@localhost ssl]# systemctl start etcd
[root@localhost ssl]# systemctl status etcd
[root@localhost ssl]# systemctl enable etcd

9.检查etcd群集状态
[root@master etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.100.170:2379,https://192.168.100.180:2379,https://192.168.100.190:2379" cluster-health
member 257ab5cb19142f4b is healthy: got healthy result from https://192.168.100.180:2379
member 777f7eb10e389e47 is healthy: got healthy result from https://192.168.100.190:2379
member eac869b8bd29e072 is healthy: got healthy result from https://192.168.100.170:2379
cluster is healthy

‘检查集群状态：注意相对路径‘

#二: node节点docker引擎部署和flannel网络配置------------------------------------

//所有node节点部署docker引擎,详见docker安装脚本
//master服务器分配ETCD网络
1.master节点写入分配的子网段到ETCD中，供flannel使用
[root@master etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.100.170:2379,https://192.168.100.180:2379,https://192.168.100.190:2379" set /coreos.com/network/config ‘{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}‘

2.查看写入的信息
[root@master etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.100.170:2379,https://192.168.100.180:2379,https://192.168.100.190:2379" get /coreos.com/network/config ‘{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}‘
{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}

3.拷贝到所有node节点（只需要部署在node节点即可）
[root@master k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.195.150:/root
[root@master k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.195.151:/root
‘//谁需要跑pod，谁就需要安装flannel网络‘

//所有node节点操作解压
#####node01
[root@node1 ~]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz 
flanneld
mk-docker-opts.sh
README.md

1.创建k8s工作目录
[root@node1 ~]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p
[root@node1 ~]# mv mk-docker-opts.sh flanneld /opt/kubernetes/bin/

2.编写服务脚本与
[root@node1 ~]# cat > flannel.sh <<EOF
#!/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
EOF

3.开启flannel网络功能
[root@node1 ~]# bash flannel.sh https://192.168.100.170:2379,https://192.168.100.170:2379,https://192.168.100.180:2379

4.配置docker连接flannel
[root@node1 ~]# bash flannel.sh https://192.168.100.170:2379,https://192.168.100.180:2379,https://192.168.100.190:2379
    Created symlink from /etc/systemd/system/multi-user.target.wants/flanneld.service to /usr/lib/systemd/system/flanneld.service.

5.配置docker连接flannel
[root@node1 ~]# vim /usr/lib/systemd/system/docker.service

[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
EnvironmentFile=/run/flannel/subnet.env         "添加行"
ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/run/containerd/containerd.sock    "添加$DOCKER_NETWORK_OPTIONS"
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always

[root@localhost ~]# cat /run/flannel/subnet.env
DOCKER_OPT_BIP="--bip=172.17.42.1/24"
DOCKER_OPT_IPMASQ="--ip-masq=false"
DOCKER_OPT_MTU="--mtu=1450"
//说明：bip指定启动时的子网
DOCKER_NETWORK_OPTIONS=" --bip=172.17.42.1/24 --ip-masq=false --mtu=1450" 
6.重启docker服务
[root@node1 ~]# systemctl daemon-reload
[root@node1 ~]# systemctl restart docker

7.查看flannel网络
[root@node1 ~]# ifconfig

###node2
[root@node1 ~]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz 
flanneld
mk-docker-opts.sh
README.md

1.创建k8s工作目录
[root@node1 ~]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p
[root@node1 ~]# mv mk-docker-opts.sh flanneld /opt/kubernetes/bin/

2.编写服务脚本与
[root@node1 ~]# cat > flannel.sh <<EOF
#!/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
EOF

3.开启flannel网络功能
[root@node1 ~]# bash flannel.sh https://192.168.100.170:2379,https://192.168.100.170:2379,https://192.168.100.180:2379

4.配置docker连接flannel
[root@node1 ~]# bash flannel.sh https://192.168.100.170:2379,https://192.168.100.180:2379,https://192.168.100.190:2379
    Created symlink from /etc/systemd/system/multi-user.target.wants/flanneld.service to /usr/lib/systemd/system/flanneld.service.

5.配置docker连接flannel
[root@node1 ~]# vim /usr/lib/systemd/system/docker.service

[Service]
Type=notify
# the default is not to use systemd for cgroups because the delegate issues still
# exists and systemd currently does not support the cgroup feature set required
# for containers run by docker
EnvironmentFile=/run/flannel/subnet.env         "添加行"
ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/run/containerd/containerd.sock    "添加$DOCKER_NETWORK_OPTIONS"
ExecReload=/bin/kill -s HUP $MAINPID
TimeoutSec=0
RestartSec=2
Restart=always

[root@localhost ~]# cat /run/flannel/subnet.env
DOCKER_OPT_BIP="--bip=172.17.42.1/24"
DOCKER_OPT_IPMASQ="--ip-masq=false"
DOCKER_OPT_MTU="--mtu=1450"
//说明：bip指定启动时的子网
DOCKER_NETWORK_OPTIONS=" --bip=172.17.42.1/24 --ip-masq=false --mtu=1450" 
6.重启docker服务
[root@node1 ~]# systemctl daemon-reload
[root@node1 ~]# systemctl restart docker

7.查看flannel网络
[root@node2 ~]# ifconfig

#####测试ping通对方docker0网卡 证明flannel起到路由作用
[root@node1 ~]# docker run -it centos:7 /bin/bash

[root@5f9a65565b53 /]# yum install net-tools -y
[root@5f9a65565b53 /]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        inet 172.17.84.2  netmask 255.255.255.0  broadcast 172.17.84.255
        ether 02:42:ac:11:54:02  txqueuelen 0  (Ethernet)
        RX packets 18192  bytes 13930229 (13.2 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6179  bytes 337037 (329.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        loop  txqueuelen 1  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@node2 ~]# docker run -it centos:7 /bin/bash

[root@abbc159a6378 /]# yum install net-tools -y
[root@abbc159a6378 /]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        inet 172.17.36.2  netmask 255.255.255.0  broadcast 172.17.84.255
        ether 02:42:ac:11:54:02  txqueuelen 0  (Ethernet)
        RX packets 18192  bytes 13930229 (13.2 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 6179  bytes 337037 (329.1 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

#测试
[root@abbc159a6378 /]# ping 172.17.84.2
[root@5f9a65565b53 /]# ping 172.17.36.2
"容器相互能ping通就说明容器间能跨宿主机相互访问"

四: 部署master组件
//在master上操作，api-server生成证书
1、master节点操作，api-server生成证书
[root@localhost k8s]# unzip master.zip
[root@localhost k8s]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p "创建配置文件目录,脚本目录,证书目录"
[root@localhost k8s]# mkdir k8s-cert
[root@localhost k8s]# cd k8s-cert/
[root@localhost k8s-cert]# ls           "上传k8s-cert.sh到这里"
k8s-cert.sh
[root@master k8s-cert]# cat k8s-cert.sh
cat > ca-config.json <<EOF      "ca的json证书"
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF

cat > ca-csr.json <<EOF     "ca的签名证书"
{
    "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 -   "创建ca 证书,执行后会生成ca.pem和ca-key.pem"

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

cat > server-csr.json <<EOF
{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",               "Cloud vip地址,这里不用修改"
      "127.0.0.1",              "本地地址"
      "192.168.100.170",        "master1地址,这里生成证书,规划一下地址授权证书,方便后续多节点部署"
      "192.168.100.160",        "master2地址"
      "192.168.100.100",        "vip"
      "192.168.100.150",        "loadbalance(master)"
      "192.168.100.140",        "loadbalance(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",         "名称,可以自定义"
            "ST": "BeiJing",        "名称,可以自定义"
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF

#生成server证书,这个命令执行后会产生server-key.pem server.pem
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      "管理员签名"
{
  "CN": "admin",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}
EOF
#生成管理员证书 执行以下命令会生成admin.pem admin-key.pem
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         "代理签名"
{
  "CN": "system:kube-proxy",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "BeiJing",
      "ST": "BeiJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF
#生成代理端的证书,会生成kube-proxy-key.pem kube-proxy.pem
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy

2.制作证书
[root@master k8s-cert]# bash k8s-cert.sh        "生成证书"

[root@master k8s-cert]# ls *.pem
admin-key.pem  ca-key.pem  kube-proxy-key.pem  server-key.pem
admin.pem      ca.pem      kube-proxy.pem      server.pem
[root@master k8s-cert]# cp ca*pem server*pem /opt/kubernetes/ssl/
[root@master k8s-cert]# cd ..
[root@master k8s]# ls
apiserver.sh           etcd-v3.3.10-linux-amd64              master.zip
controller-manager.sh  etcd-v3.3.10-linux-amd64.tar.gz       scheduler.sh
etcd-cert              k8s-cert
etcd.sh                kubernetes-server-linux-amd64.tar.gz

3、解压k8s服务器端压缩包

[root@master k8s]# tar zxvf kubernetes-server-linux-amd64.tar.gz

4.复制服务器端关键命令到k8s工作目录中
[root@master k8s]# cd /root/k8s/kubernetes/server/bin
[root@master bin]# cp kube-apiserver kubectl kube-controller-manager kube-scheduler /opt/kubernetes/bin/

5、编辑令牌并绑定角色kubelet-bootstrap
[root@master k8s]# cd /root/k8s
[root@master k8s]# head -c 16 /dev/urandom | od -An -t x | tr -d ‘ ‘ ‘//随机生成序列号‘
0d8e1e148121fc25d8623239ae6cf7e0
[root@master k8s]# vim /opt/kubernetes/cfg/token.csv
0d8e1e148121fc25d8623239ae6cf7e0,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
#‘//序列号，用户名，id，角色，这个用户是master用来管理node节点的‘

6、开启apiserver，将数据存放在etcd集群中并检查kube状态
[root@master k8s]# bash apiserver.sh 192.168.100.170 https://192.168.100.170:2379,https://192.168.100.180:2379,https://192.168.100.190:2379
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-apiserver.service to /usr/lib/systemd/system/kube-apiserver.service.
[root@localhost k8s]# ps aux | grep kube    "检查进程是否成功启动"
[root@master ~]#  cat /opt/kubernetes/cfg/kube-apiserver

KUBE_APISERVER_OPTS="--logtostderr=true --v=4 --etcd-servers=https://192.168.100.170:2379,https://192.168.100.180:2379,https://192.168.100.190:2379 --bind-address=192.168.100.170 --secure-port=6443 --advertise-address=192.168.100.170 --allow-privileged=true --service-cluster-ip-range=10.0.0.0/24 --enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,ResourceQuota,NodeRestriction --authorization-mode=RBAC,Node --kubelet-https=true --enable-bootstrap-token-auth --token-auth-file=/opt/kubernetes/cfg/token.csv --service-node-port-range=30000-50000 --tls-cert-file=/opt/kubernetes/ssl/server.pem  --tls-private-key-file=/opt/kubernetes/ssl/server-key.pem --client-ca-file=/opt/kubernetes/ssl/ca.pem --service-account-key-file=/opt/kubernetes/ssl/ca-key.pem --etcd-cafile=/opt/etcd/ssl/ca.pem --etcd-certfile=/opt/etcd/ssl/server.pem --etcd-keyfile=/opt/etcd/ssl/server-key.pem"
[root@master k8s]#  netstat -ntap | grep 6443
tcp        0      0 192.168.100.170:6443    0.0.0.0:*               LISTEN      69865/kube-apiserve 
tcp        0      0 192.168.100.170:6443    192.168.100.170:53210   ESTABLISHED 69865/kube-apiserve 
tcp        0      0 192.168.100.170:53210   192.168.100.170:6443    ESTABLISHED 69865/kube-apiserve 
[root@master k8s]#  netstat -ntap | grep 8080
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      69865/kube-apiserve 

7、启动scheduler服务
[root@master k8s]# ./scheduler.sh 127.0.0.1
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-scheduler.service to /usr/lib/systemd/system/kube-scheduler.service.
[root@master k8s]#  ps aux | grep ku
postfix   68074  0.0  0.1  91732  4080 ?        S    10:07   0:00 pickup -l -t unix -u
root      69865 14.4  8.0 401580 311244 ?       Ssl  11:43   0:09 
[root@master k8s]# chmod +x controller-manager.sh

8、启动controller-manager

[root@master k8s]# ./controller-manager.sh 127.0.0.1
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-controller-manager.service to /usr/lib/systemd/system/kube-controller-manager.service.

9、查看master节点状态
[root@master k8s]# /opt/kubernetes/bin/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"}   

[root@master bin]# scp kubelet kube-proxy root@192.168.100.180:/opt/kubernetes/bin/
root@192.168.100.180‘s password: 
kubelet                                      100%  168MB  74.8MB/s   00:02    
kube-proxy                                   100%   48MB  97.6MB/s   00:00    
[root@master bin]# scp kubelet kube-proxy root@192.168.100.190:/opt/kubernetes/bin/
root@192.168.100.190‘s password: 
kubelet                                      100%  168MB 101.4MB/s   00:01    
kube-proxy                                   100%   48MB 102.3MB/s   00:00    

//node节点部署

1、master节点上将kubectl和kube-proxy拷贝到node节点
[root@master bin]# scp kubelet kube-proxy root@192.168.100.180:/opt/kubernetes/bin/
root@192.168.100.180‘s password: 
kubelet                                      100%  168MB  74.8MB/s   00:02    
kube-proxy                                   100%   48MB  97.6MB/s   00:00    
[root@master bin]# scp kubelet kube-proxy root@192.168.100.190:/opt/kubernetes/bin/
root@192.168.100.190‘s password: 
kubelet                                      100%  168MB 101.4MB/s   00:01    
kube-proxy                                   100%   48MB 102.3MB/s   00:00    

2.nod01节点操作（复制node.zip到/root目录下再解压）

[root@localhost ~]# ls
anaconda-ks.cfg  flannel-v0.10.0-linux-amd64.tar.gz  node.zip   公共  视频  文档  音乐
flannel.sh       initial-setup-ks.cfg                README.md  模板  图片  下载  桌面
//解压node.zip，获得kubelet.sh  proxy.sh 
[root@localhost ~]# unzip node.zip 

3.在master上操作,创建kubeconfig目录

[root@localhost k8s]# mkdir kubeconfig
[root@localhost k8s]# cd kubeconfig/
//拷贝kubeconfig.sh文件进行重命名
[root@localhost kubeconfig]# mv kubeconfig.sh kubeconfig
[root@master kubeconfig]# cat /opt/kubernetes/cfg/token.csv
0d8e1e148121fc25d8623239ae6cf7e0,kubelet-bootstrap,10001,"system:kubelet-bootst"
[root@master kubeconfig]# vim kubeconfig 

APISERVER=$1
SSL_DIR=$2

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

# 设置集群参数
kubectl config set-cluster kubernetes   --certificate-authority=$SSL_DIR/ca.pem   --embed-certs=true   --server=${KUBE_APISERVER}   --kubeconfig=bootstrap.kubeconfig

# 设置客户端认证参数
kubectl config set-credentials kubelet-bootstrap   --token=0d8e1e148121fc25d8623239ae6cf7e0 \    ‘//此token序列号就是之前/opt/kubernetes/cfg/token.csv 文件中使用的的‘
  --kubeconfig=bootstrap.kubeconfig

# 设置上下文参数
kubectl config set-context default   --cluster=kubernetes   --user=kubelet-bootstrap   --kubeconfig=bootstrap.kubeconfig

# 设置默认上下文
kubectl config use-context default --kubeconfig=bootstrap.kubeconfig

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

# 创建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@master kubeconfig]# export PATH=$PATH:/opt/kubernetes/bin/    ‘//设置环境变量（可以写入到/etc/prlfile中）‘
[root@master kubeconfig]# kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok                  
controller-manager   Healthy   ok                  
etcd-0               Healthy   {"health":"true"}   
etcd-1               Healthy   {"health":"true"}   
etcd-2               Healthy   {"health":"true"}   

4、生成配置文件并拷贝到node节点
[root@master kubeconfig]# bash kubeconfig 192.168.100.170 /root/k8s/k8s-cert/
Cluster "kubernetes" set.
User "kubelet-bootstrap" set.
Context "default" created.
Switched to context "default".
Cluster "kubernetes" set.
User "kube-proxy" set.
Context "default" created.
User "kubelet-bootstrap" set.
Switched to context "default".
[root@master kubeconfig]# ls
bootstrap.kubeconfig  kubeconfig  kube-proxy.kubeconfig
#拷贝配置文件到node节点
[root@master kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.100.180:/opt/kubernetes/cfg/
root@192.168.100.180‘s password: 
bootstrap.kubeconfig                         100% 2169     1.4MB/s   00:00    
kube-proxy.kubeconfig                        100% 6275     5.8MB/s   00:00    
[root@master kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.100.190:/opt/kubernetes/cfg/
root@192.168.100.190‘s password: 
bootstrap.kubeconfig                         100% 2169   352.8KB/s   00:00    
kube-proxy.kubeconfig                        100% 6275     3.3MB/s   00:00   

5.创建bootstrap角色赋予权限用于连接apiserver请求签名（关键）
[root@master kubeconfig]# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap
clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created

//在节点上操作
6、node01节点操作生成kubelet kubelet.config配置文件
#------------------------------------node1操作
#创建kubelete的配置文件与服务脚本
[root@node1 ~]# bash kubelet.sh 192.168.100.180
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.
#检查kubelete服务启动
[root@node1 ~]# ps aux | grep kube
root      10206  0.0  0.6 391444 18372 ?        Ssl  07:55   0:11 /opt/kubernetes/bin/flanneld --ip-masq --etcd-endpoints=https://192.168.100.170:2379,https://192.168.100.180:2379,https://192.168.100.190:2379 -etcd-cafile=/opt/etcd/ssl/ca.pem -etcd-certfile=/opt/etcd/ssl/server.pem -etcd-keyfile=/opt/etcd/ssl/server-key.pem
root      32918  3.2  1.5 405340 45420 ?        Ssl  11:57   0:00 /opt/kubernetes/bin/kubelet --logtostderr=true --v=4 --hostname-override=192.168.100.180 --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
root      32952  0.0  0.0 112724   988 pts/0    S+   11:57   0:00 grep --color=auto kube

7、master上检查到node01节点的请求，查看证书状态
#------------------------------master上操作
#检查到node01节点的请求
[root@master kubeconfig]# kubectl get csr
NAME                                                   AGE   REQUESTOR           CONDITION
node-csr-lk45yzxFkiUhV8b36fmhmFsZdqtD8JUWV1Vkiq9w7Nw   30s   kubelet-bootstrap   Pending        "（等待集群给该节点颁发证书）"

8、颁发证书，再次查看证书状态
[root@master kubeconfig]# kubectl certificate approve node-csr-lk45yzxFkiUhV8b36fmhmFsZdqtD8JUWV1Vkiq9w7Nw
certificatesigningrequest.certificates.k8s.io/node-csr-lk45yzxFkiUhV8b36fmhmFsZdqtD8JUWV1Vkiq9w7Nw approved     "master进行授权允许加入群集"
#继续查看证书状态
[root@master kubeconfig]# kubectl get csr
NAME                                                   AGE     REQUESTOR           CONDITION
node-csr-lk45yzxFkiUhV8b36fmhmFsZdqtD8JUWV1Vkiq9w7Nw   6m19s   kubelet-bootstrap   Approved,Issued  "（已经被允许加入群集）"

[root@master kubeconfig]# kubectl get csr
NAME                                                   AGE     REQUESTOR           CONDITION
node-csr-lk45yzxFkiUhV8b36fmhmFsZdqtD8JUWV1Vkiq9w7Nw   6m19s   kubelet-bootstrap   Approved,Issued

9、查看集群状态并启动proxy服务

[root@master kubeconfig]# kubectl get node
NAME              STATUS   ROLES    AGE   VERSION
192.168.100.180   Ready    <none>   31s   v1.12.3
#‘//如果有一个节点noready，检查kubelet，如果很多节点noready，那就检查apiserver，如果没问题再检查VIP地址，keepalived‘

#---------------------------node1节点操作,启动proxy服务
[root@node1 ~]# ls
anaconda-ks.cfg    flannel-v0.10.0-linux-amd64.tar.gz  node.zip
docker-install.sh  initial-setup-ks.cfg                proxy.sh
flannel.sh         kubelet.sh                          README.md
[root@node1 ~]# bash proxy.sh 192.168.100.180
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-proxy.service to /usr/lib/systemd/system/kube-proxy.service.
[root@node1 ~]# systemctl status kube-proxy.service
● kube-proxy.service - Kubernetes Proxy
   Loaded: loaded (/usr/lib/systemd/system/kube-proxy.service; enabled; vendor preset: disabled)
   Active: active (running) since 二 2020-09-29 12:04:50 CST; 9s ago
 Main PID: 34171 (kube-proxy)
    Tasks: 0
   Memory: 8.2M
   CGroup: /system.slice/kube-proxy.service
           ? 34171 /opt/kubernetes/bin/kube-proxy --logtostderr=true --v=4 -...

#部署node2
#----------------------------在node01节点操作
#把现成的/opt/kubernetes目录复制到其他node节点进行修改即可
[root@node1 ~]# scp -r /opt/kubernetes/ root@192.168.100.190:/opt/

#把kubelet，kube-proxy的service文件拷贝到node2中
[root@node1 ~]# scp /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@192.168.100.190:/usr/lib/systemd/system/
root@192.168.100.190‘s ‘password: 
kubelet.service                              100%  264   159.9KB/s   00:00    
kube-proxy.service                           100%  231   302.4KB/s   00:00    
[root@node1 ~]# systemctl enable kubelet.service

#------------------------------node2操作
1、修改三个配置文件的IP地址
#首先删除复制过来的证书，等会node02会自行申请证书
[root@node2 ~]#  cd kubeconfig/
[root@node2 kubeconfig]# cd /opt/kubernetes/ssl/
[root@node2 ssl]# ls
kubelet-client-2020-09-29-12-03-29.pem  kubelet.crt
kubelet-client-current.pem              kubelet.key
[root@node2 ssl]# rm -rf *
[root@node2 ssl]# ls
[root@node2 ssl]# cd ../cfg/

2、启动服务并查看状态
#修改配置文件kubelet  kubelet.config kube-proxy（三个配置文件）
[root@node2 cfg]# vim kubelet

KUBELET_OPTS="--logtostderr=true --v=4 --hostname-override=192.168.100.190 \           "改成node2地址"
--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"

[root@node2 cfg]# vim kubelet.config
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 192.168.100.190                    "node2地址"
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS:
- 10.0.0.2
clusterDomain: cluster.local.
failSwapOn: false
authentication:
  anonymous:
    enabled: true

[root@node2 cfg]# vim kube-proxy

KUBE_PROXY_OPTS="--logtostderr=true --v=4 --hostname-override=192.168.100.190 \       "node2的地址"
--cluster-cidr=10.0.0.0/24 --proxy-mode=ipvs --kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"

#启动服务
[root@node2 cfg]# systemctl start kubelet.service
[root@node2 cfg]# systemctl enable kubelet.service
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.
[root@node2 cfg]# systemctl start kube-proxy.service
[root@node2 cfg]# systemctl enable kube-proxy.service
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-proxy.service to /usr/lib/systemd/system/kube-proxy.service.

3.master上操作查看请求并同意node02证书
//在master上操作查看请求Pending
[root@master kubeconfig]# kubectl get csr
NAME                                                   AGE   REQUESTOR           CONDITION
node-csr-Q22FXrUtwbkKu5b0LQcMbbyXYMuCMkGKUyH0ME1x2ow   47s   kubelet-bootstrap   Pending
node-csr-lk45yzxFkiUhV8b36fmhmFsZdqtD8JUWV1Vkiq9w7Nw   12m   kubelet-bootstrap   Approved,Issued
[root@master kubeconfig]# kubectl get node
NAME              STATUS   ROLES    AGE     VERSION
192.168.100.180   Ready    <none>   6m26s   v1.12.3

[root@master kubeconfig]# kubectl certificate approve node-csr-Q22FXrUtwbkKu5b0LQcMbbyXYMuCMkGKUyH0ME1x2ow              "授权允许请求加入群集"
certificatesigningrequest.certificates.k8s.io/node-csr-Q22FXrUtwbkKu5b0LQcMbbyXYMuCMkGKUyH0ME1x2ow approved

"master查看群集中的节点"
[root@master kubeconfig]# kubectl get node
NAME              STATUS   ROLES    AGE     VERSION
192.168.100.180   Ready    <none>   8m52s   v1.12.3
192.168.100.190   Ready    <none>   43s     v1.12.3

Kubernetes单节点部署二进制k8s群集

标签：flann   管理员   algo   启动服务   bin   ant   docker   yml   成功   

原文地址：https://blog.51cto.com/14625831/2548608