kubernets二进制安装----部署apiserver组件，kubectl组件以及proxy组件

部署master组件

在master上操作，api-server生成证书

[root@localhost k8s]# unzip master.zip
[root@localhost k8s]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p
[root@localhost k8s]# mkdir k8s-cert
[root@localhost k8s]# cd k8s-cert/
[root@localhost k8s-cert]# ls
k8s-cert.sh


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",
      "192.168.162.10",  //master1
      "192.168.162.20",  //master2
      "192.168.162.100",  //vip
      "192.168.162.50",  //lb （master）
      "192.168.162.60",  //lb （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

生成k8s证书

[root@localhost k8s-cert]# bash k8s-cert.sh 

2020/01/15 23:31:03 [INFO] generating a new CA key and certificate from CSR
2020/01/15 23:31:03 [INFO] generate received request
2020/01/15 23:31:03 [INFO] received CSR
2020/01/15 23:31:03 [INFO] generating key: rsa-2048
2020/01/15 23:31:03 [INFO] encoded CSR
2020/01/15 23:31:03 [INFO] signed certificate with serial number 149957285008634365032949076461783766565292979186
2020/01/15 23:31:03 [INFO] generate received request
2020/01/15 23:31:03 [INFO] received CSR
2020/01/15 23:31:03 [INFO] generating key: rsa-2048
2020/01/15 23:31:03 [INFO] encoded CSR
2020/01/15 23:31:03 [INFO] signed certificate with serial number 531833477097469967316212525772159687029821034128
2020/01/15 23:31:03 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
2020/01/15 23:31:04 [INFO] generate received request
2020/01/15 23:31:04 [INFO] received CSR
2020/01/15 23:31:04 [INFO] generating key: rsa-2048
2020/01/15 23:31:04 [INFO] encoded CSR
2020/01/15 23:31:04 [INFO] signed certificate with serial number 684040931566157342098288079791465097738732990534
2020/01/15 23:31:04 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
2020/01/15 23:31:04 [INFO] generate received request
2020/01/15 23:31:04 [INFO] received CSR
2020/01/15 23:31:04 [INFO] generating key: rsa-2048
2020/01/15 23:31:04 [INFO] encoded CSR
2020/01/15 23:31:04 [INFO] signed certificate with serial number 681469506930419424853732902538890426797365900103
2020/01/15 23:31:04 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").

[root@localhost 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@localhost k8s-cert]# cp ca*pem server*pem /opt/kubernetes/ssl/
[root@localhost k8s-cert]# cd ..

解压kubernetes压缩包

[root@localhost k8s]# tar zxvf kubernetes-server-linux-amd64.tar.gz
[root@localhost k8s]# cd /root/k8s/kubernetes/server/bin

复制关键命令文件

[root@localhost bin]# cp kube-apiserver kubectl kube-controller-manager kube-scheduler /opt/kubernetes/bin/
[root@localhost k8s]# cd /root/k8s
[root@localhost k8s]# vim /opt/kubernetes/cfg/token.csv
0fb61c46f8991b718eb38d27b605b008,kubelet-bootstrap,10001,"system:kubelet-bootstrap"

序列号，用户名，id，角色
//使用 head -c 16 /dev/urandom | od -An -t x | tr -d ' ' 可以随机生成序列号

二进制文件，token，证书都准备好，开启apiserver

[root@localhost k8s]# bash apiserver.sh 192.168.162.10 https://192.168.162.10:2379,https://192.168.162.30:2379,https://192.168.162.40:2379

Created symlink from /etc/systemd/system/multi-user.target.wants/kube-apiserver.service to /usr/lib/systemd/system/kube-apiserver.service.

检查进程是否启动成功

[root@localhost k8s]# ps aux | grep kube

查看配置文件

[root@localhost k8s]# cat /opt/kubernetes/cfg/kube-apiserver 

KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--etcd-servers=https://192.168.195.149:2379,https://192.168.195.150:2379,https://192.168.195.151:2379 \
--bind-address=192.168.195.149 \
--secure-port=6443 \
--advertise-address=192.168.195.149 \
--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"

监听的https端口

[root@localhost k8s]# netstat -ntap | grep 6443
tcp        0      0 192.168.195.149:6443    0.0.0.0:*               LISTEN      46459/kube-apiserve 
tcp        0      0 192.168.195.149:6443    192.168.195.149:36806   ESTABLISHED 46459/kube-apiserve 
tcp        0      0 192.168.195.149:36806   192.168.195.149:6443    ESTABLISHED 46459/kube-apiserve 
[root@localhost k8s]# netstat -ntap | grep 8080
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      46459/kube-apiserve 

启动scheduler服务

root@localhost 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@localhost k8s]# ps aux | grep ku
[root@localhost k8s]# chmod +x controller-manager.sh 
//启动controller-manager
[root@localhost 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.

查看master 节点状态

[root@localhost k8s]# /opt/kubernetes/bin/kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok                  
controller-manager   Healthy   ok                  
etcd-2               Healthy   {"health":"true"}   
etcd-1               Healthy   {"health":"true"}   
etcd-0               Healthy   {"health":"true"}   

node节点部署

把 kubelet、kube-proxy拷贝到node节点上去

[root@localhost bin]# scp kubelet kube-proxy root@192.168.162.30:/opt/kubernetes/bin/
root@192.168.195.150's password: 
kubelet                                                           100%  168MB  27.9MB/s   00:06    
kube-proxy                                                        100%   48MB  31.5MB/s   00:01    
[root@localhost bin]# scp kubelet kube-proxy root@192.168.162.40:/opt/kubernetes/bin/
root@192.168.195.151's password: 
kubelet                                                           100%  168MB  56.1MB/s   00:03    
kube-proxy                                                        100%   48MB  37.3MB/s   00:01    

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 

在master上操作

[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@localhost kubeconfig]# vim kubeconfig 

删除以下部分

创建 TLS Bootstrapping Token

#BOOTSTRAP_TOKEN=$(head -c 16 /dev/urandom | od -An -t x | tr -d ' ')
BOOTSTRAP_TOKEN=0fb61c46f8991b718eb38d27b605b008

cat > token.csv <<EOF
${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF

获取token信息（红色部分）

[root@localhost ~]# cat /opt/kubernetes/cfg/token.csv 
6351d652249951f79c33acdab329e4c4,kubelet-bootstrap,10001,"system:kubelet-bootstrap"

配置文件修改为tokenID

kubectl config set-credentials kubelet-bootstrap \
  --token=6351d652249951f79c33acdab329e4c4 \
  --kubeconfig=bootstrap.kubeconfig

设置环境变量（可以写入到/etc/profile中）

[root@localhost kubeconfig]# export PATH=$PATH:/opt/kubernetes/bin/
[root@localhost kubeconfig]# kubectl get cs
NAME                 STATUS    MESSAGE             ERROR
scheduler            Healthy   ok                  
controller-manager   Healthy   ok                  
etcd-1               Healthy   {"health":"true"}   
etcd-0               Healthy   {"health":"true"}   
etcd-2               Healthy   {"health":"true"}   

生成配置文件

[root@localhost kubeconfig]# bash kubeconfig 192.168.162.10 /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.
Switched to context "default".
[root@localhost kubeconfig]# ls
bootstrap.kubeconfig  kubeconfig  kube-proxy.kubeconfig

拷贝配置文件到node节点

[root@localhost kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.162.30:/opt/kubernetes/cfg/
root@192.168.162.30's password: 
bootstrap.kubeconfig                                              100% 2169     2.1MB/s   00:00    
kube-proxy.kubeconfig                                             100% 6275     4.2MB/s   00:00    
[root@localhost kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.162.40:/opt/kubernetes/cfg/
root@192.168.162.40's password: 
bootstrap.kubeconfig                                              100% 2169     1.8MB/s   00:00    
kube-proxy.kubeconfig                                             100% 6275     5.3MB/s   00:00    

创建bootstrap角色赋予权限用于连接apiserver请求签名（关键）

[root@localhost kubeconfig]# kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap
clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created

在node01节点上操作

[root@localhost ~]# bash kubelet.sh 192.168.162.30
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.

检查kubelet服务启动

[root@localhost ~]# ps aux | grep kube
root     106845  1.4  1.1 371744 44780 ?        Ssl  00:34   0:01 /opt/kubernetes/bin/kubelet --logtostderr=true --v=4 --hostname-override=192.168.195.150 --kubeconfig=/opt/kubernetes/cfg/kubelet.kubconfig --bootstrap-kubeconfig=/opt/kubernetes/cfg/bootstrap.kubeconfig --config=/opt/kubernetes/cfgkubelet.config --cert-dir=/opt/kubernetes/ssl --pod-infra-container-image=registry.cn-hangzhou.aliyuncs.com/google-containers/pause-amd64:3.0
root     106876  0.0  0.0 112676   984 pts/0    S+   00:35   0:00 grep --color=auto kube

master上操作

检查到node01节点的请求
[root@localhost kubeconfig]# kubectl get csr
NAME                                                   AGE     REQUESTOR           CONDITION
node-csr-NOI-9vufTLIqJgMWq4fHPNPHKbjCXlDGHptj7FqTa8A   4m27s   kubelet-bootstrap   Pending（等待集群给该节点颁发证书）
[root@localhost kubeconfig]# kubectl certificate approve node-csr-NOI-9vufTLIqJgMWq4fHPNPHKbjCXlDGHptj7FqTa8A
certificatesigningrequest.certificates.k8s.io/node-csr-NOI-9vufTLIqJgMWq4fHPNPHKbjCXlDGHptj7FqTa8A approved

继续查看证书状态

[root@localhost kubeconfig]# kubectl get csr
NAME                                                   AGE     REQUESTOR           CONDITION
node-csr-NOI-9vufTLIqJgMWq4fHPNPHKbjCXlDGHptj7FqTa8A   8m56s   kubelet-bootstrap   Approved,Issued（已经被允许加入群集）

查看群集节点，成功加入node01节点

[root@localhost kubeconfig]# kubectl get node
NAME              STATUS   ROLES    AGE    VERSION
192.168.195.150   Ready    <none>   118s   v1.12.3

在node01节点操作，启动proxy服务

[root@localhost ~]# bash proxy.sh 192.168.162.30
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-proxy.service to /usr/lib/systemd/system/kube-proxy.service.
[root@localhost ~]# 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 日 2020-02-02 00:47:29 CST; 11s ago
 Main PID: 108006 (kube-proxy)
   Memory: 7.5M
   CGroup: /system.slice/kube-proxy.service
           ‣ 108006 /opt/kubernetes/bin/kube-proxy --logtostderr=true --v=4 --hostname-override=1...

2月 02 00:47:32 localhost.localdomain kube-proxy[108006]: I0202 00:47:32.040427  108006 config...te
2月 02 00:47:32 localhost.localdomain kube-proxy[108006]: I0202 00:47:32.057419  108006 config...te
2月 02 00:47:34 localhost.localdomain kube-proxy[108006]: I0202 00:47:34.059627  108006 config...te
2月 02 00:47:34 localhost.localdomain kube-proxy[108006]: I0202 00:47:34.076914  108006 config...te
2月 02 00:47:36 localhost.localdomain kube-proxy[108006]: I0202 00:47:36.091570  108006 config...te
2月 02 00:47:36 localhost.localdomain kube-proxy[108006]: I0202 00:47:36.105162  108006 config...te
2月 02 00:47:38 localhost.localdomain kube-proxy[108006]: I0202 00:47:38.103518  108006 config...te
2月 02 00:47:38 localhost.localdomain kube-proxy[108006]: I0202 00:47:38.115902  108006 config...te
2月 02 00:47:40 localhost.localdomain kube-proxy[108006]: I0202 00:47:40.113628  108006 config...te
2月 02 00:47:40 localhost.localdomain kube-proxy[108006]: I0202 00:47:40.125818  108006 config...te
Hint: Some lines were ellipsized, use -l to show in full.

node02节点部署

在node01节点操作

把现成的/opt/kubernetes目录复制到其他节点进行修改即可
[root@localhost ~]# scp -r /opt/kubernetes/ root@192.168.162.40:/opt/
The authenticity of host '192.168.195.151 (192.168.195.151)' can't be established.
ECDSA key fingerprint is SHA256:HyV9L/xOcN5435t9zCPMCC63XiwMwgBLIa7L++Gea0k.
ECDSA key fingerprint is MD5:4b:01:0f:c3:cb:3e:3a:4c:f0:51:85:fc:c1:6b:c5:fe.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.195.151' (ECDSA) to the list of known hosts.
root@192.168.195.151's password: 
flanneld                                                          100%  241   471.1KB/s   00:00    
bootstrap.kubeconfig                                              100% 2169     2.9MB/s   00:00    
kube-proxy.kubeconfig                                             100% 6275    10.3MB/s   00:00    
kubelet                                                           100%  379   130.7KB/s   00:00    
kubelet.config                                                    100%  269   420.0KB/s   00:00    
kubelet.kubeconfig                                                100% 2298     3.5MB/s   00:00    
kube-proxy                                                        100%  191   353.2KB/s   00:00    
mk-docker-opts.sh                                                 100% 2139     4.5MB/s   00:00    
flanneld                                                          100%   35MB  50.5MB/s   00:00    
kubelet                                                           100%  168MB  84.9MB/s   00:01    
kube-proxy                                                        100%   48MB  94.7MB/s   00:00    
kubelet.crt                                                       100% 2197   902.9KB/s   00:00    
kubelet.key                                                       100% 1679     2.3MB/s   00:00    
kubelet-client-2020-02-02-00-42-27.pem                            100% 1277   493.9KB/s   00:00    
kubelet-client-current.pem                                        100% 1277   429.5KB/s   00:00   

把kubelet，kube-proxy的service文件拷贝到node2中

 [root@localhost ~]# scp /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@192.168.162.40:/usr/lib/systemd/system/
root@192.168.195.151's password: 
kubelet.service                                                   100%  264   303.9KB/s   00:00    
kube-proxy.service                                                100%  231   209.1KB/s   00:00    

在node02上操作，进行修改

首先删除复制过来的证书，等会node02会自行申请证书
[root@localhost ~]# cd /opt/kubernetes/ssl/
[root@localhost ssl]# rm -rf *
//修改配置文件kubelet  kubelet.config kube-proxy（三个配置文件）

[root@localhost ssl]# cd ../cfg/
[root@localhost cfg]# vim kubelet

启动服务

[root@localhost cfg]# systemctl start kubelet.service 
[root@localhost 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@localhost cfg]# systemctl start kube-proxy.service 
[root@localhost 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.

在master上操作查看请求

[root@localhost k8s]# kubectl get csr
NAME                                                   AGE   REQUESTOR           CONDITION
node-csr-OaH9HpIKh6AKlfdjEKm4C6aJ0UT_1YxNaa70yEAxnsU   15s   kubelet-bootstrap   Pending

授权许可加入群集

[root@localhost k8s]# kubectl certificate approve node-csr-OaH9HpIKh6AKlfdjEKm4C6aJ0UT_1YxNaa70yEAxnsU
certificatesigningrequest.certificates.k8s.io/node-csr-OaH9HpIKh6AKlfdjEKm4C6aJ0UT_1YxNaa70yEAxnsU approved

查看群集中的节点

[root@localhost k8s]# kubectl get node
NAME              STATUS   ROLES    AGE   VERSION
192.168.162.30   Ready    <none>   21h   v1.12.3
192.168.162.40   Ready    <none>   37s   v1.12.3