Single node deployment of Kubernetes binary deployment

K8s single node binary deployment

Steps for building K8s binary deployment:

1: Self signed ETCD certificate 
2: ETCD deployment 
3: Node install docker 
4: Flannel deployment (write subnet to etcd first)
---------master----------
5: Self signed APIServer certificate 
6: Deploy the APIServer component (token, csv)
7: Deploy the controller manager (specify the apiserver certificate) and scheduler components
----------node----------
8: Generate kubeconfig (bootstrap, kubeconfig and Kube proxy. Kubeconfig)
9: Deploy kubelet components
 10: Deploy the Kube proxy component
 ----------Join the cluster----------
11: Kubectl get CSR & & kubectl certificate approve allow method certificates to join the cluster
 12: Add a node
 13: View the kubectl get node node node

Environmental preparation:

**master Node:**
*CentOS 7-3: 192.168.18.128*
**node Node:**
*CentOS 7-4: 192.168.18.129  docker*
*CentOS 7-5: 192.168.18.130  docker*

Software package for experiment

k8s official website address: https://github.com/kubernetes/kubernetes/releases?after=v1.13.1

Master deployment:

[root@master ~]# mkdir k8s
[root@master ~]# cd k8s/
[root@master k8s]# mkdir etcd-cert
[root@master k8s]# mv etcd-cert.sh etcd-cert
[root@master k8s]# ls
etcd-cert  etcd.sh
[root@master 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
[root@master k8s]# bash cfssl.sh
[root@master k8s]# ls /usr/local/bin/
cfssl  cfssl-certinfo  cfssljson
[root@master k8s]# cd etcd-cert/
`Definition CA certificate`
cat > ca-config.json <<EOF
{
  "signing":{
    "default":{
      "expiry":"87600h"
    },
    "profiles":{
      "www":{
        "expiry":"87600h",
        "usages":[
          "signing",
          "key encipherment",
          "server auth",
          "client auth"
        ]
      }
    }
  }
}
EOF

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

`Production certificate, generating ca-key.pem  ca.pem`
[root@master etcd-cert]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
2020/01/15 11:26:22 [INFO] generating a new CA key and certificate from CSR
2020/01/15 11:26:22 [INFO] generate received request
2020/01/15 11:26:22 [INFO] received CSR
2020/01/15 11:26:22 [INFO] generating key: rsa-2048
2020/01/15 11:26:23 [INFO] encoded CSR
2020/01/15 11:26:23 [INFO] signed certificate with serial number 58994014244974115135502281772101176509863440005

`Appoint etcd Communication verification among three nodes`
cat > server-csr.json <<EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.18.128",
    "192.168.18.129",
    "192.168.18.130"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "NanJing",
            "ST": "NanJing"
        }
    ]
}
EOF

//Generate ETCD certificate server-key.pem server.pem
[root@master etcd-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
2020/01/15 11:28:07 [INFO] generate received request
2020/01/15 11:28:07 [INFO] received CSR
2020/01/15 11:28:07 [INFO] generating key: rsa-2048
2020/01/15 11:28:07 [INFO] encoded CSR
2020/01/15 11:28:07 [INFO] signed certificate with serial number 153451631889598523484764759860297996765909979890
2020/01/15 11:28:07 [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").

Upload the following three compression packages for decompression:

[root@master etcd-cert]# ls
ca-config.json  etcd-cert.sh                          server-csr.json
ca.csr          etcd-v3.3.10-linux-amd64.tar.gz       server-key.pem
ca-csr.json     flannel-v0.10.0-linux-amd64.tar.gz    server.pem
ca-key.pem      kubernetes-server-linux-amd64.tar.gz
ca.pem          server.csr
[root@master etcd-cert]# mv *.tar.gz ../
[root@master etcd-cert]# cd ../
[root@master k8s]# ls
cfssl.sh   etcd.sh                          flannel-v0.10.0-linux-amd64.tar.gz
etcd-cert  etcd-v3.3.10-linux-amd64.tar.gz  kubernetes-server-linux-amd64.tar.gz
[root@master k8s]# tar zxvf etcd-v3.3.10-linux-amd64.tar.gz
[root@master k8s]# ls etcd-v3.3.10-linux-amd64
Documentation  etcd  etcdctl  README-etcdctl.md  README.md  READMEv2-etcdctl.md
[root@master k8s]# mkdir /opt/etcd/{cfg,bin,ssl} -p
[root@master k8s]# mv etcd-v3.3.10-linux-amd64/etcd etcd-v3.3.10-linux-amd64/etcdctl /opt/etcd/bin/

#Certificate copy
[root@master k8s]# cp etcd-cert/*.pem /opt/etcd/ssl/

#Enter stuck state and wait for other nodes to join
[root@master k8s]# bash etcd.sh etcd01 192.168.18.128 etcd02=https://192.168.18.129:2380,etcd03=https://192.168.18.130:2380
Created symlink from /etc/systemd/system/multi-user.target.wants/etcd.service to /usr/lib/systemd/system/etcd.service.

Open a new remote connection of the master node:

[root@master ~]# ps -ef | grep etcd
root       3479   1780  0 11:48 pts/0    00:00:00 bash etcd.sh etcd01 192.168.18.128 etcd02=https://192.168.195.129:2380,etcd03=https://192.168.195.130:2380
root       3530   3479  0 11:48 pts/0    00:00:00 systemctl restart etcd
root       3540      1  1 11:48 ?        00:00:00 /opt/etcd/bin/etcd 
--name=etcd01 --data-dir=/var/lib/etcd/default.etcd 
--listen-peer-urls=https://192.168.18.128:2380 
--listen-client-urls=https://192.168.18.128:2379,http://127.0.0.1:2379 
--advertise-client-urls=https://192.168.18.128:2379 
--initial-advertise-peer-urls=https://192.168.18.128:2380 
--initial-cluster=etcd01=https://192.168.18.128:2380,etcd02=https://192.168.195.129:2380,etcd03=https://192.168.195.130:2380 
--initial-cluster-token=etcd-cluster 
--initial-cluster-state=new 
--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
root       3623   3562  0 11:49 pts/1    00:00:00 grep --color=auto etcd

Copy certificate to node

[root@master k8s]# scp -r /opt/etcd/ root@192.168.18.129:/opt/
The authenticity of host '192.168.18.129 (192.168.18.129)' can't be established.
ECDSA key fingerprint is SHA256:mTT+FEtzAu4X3D5srZlz93S3gye8MzbqVZFDzfJd4Gk.
ECDSA key fingerprint is MD5:fa:5a:88:23:49:60:9b:b8:7e:4b:14:4b:3f:cd:96:a0.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.18.129' (ECDSA) to the list of known hosts.
root@192.168.18.129's password:
etcd                                                       100%  518   455.8KB/s   00:00
etcd                                                       100%   18MB 105.0MB/s   00:00
etcdctl                                                    100%   15MB 108.2MB/s   00:00
ca-key.pem                                                 100% 1679     1.4MB/s   00:00
ca.pem                                                     100% 1265   396.1KB/s   00:00
server-key.pem                                             100% 1675     1.0MB/s   00:00
server.pem                                                 100% 1338   525.6KB/s   00:00
[root@master k8s]# scp -r /opt/etcd/ root@192.168.18.129:/opt/
The authenticity of host '192.168.18.129 (192.168.18.129)' can't be established.
ECDSA key fingerprint is SHA256:mTT+FEtzAu4X3D5srZlz93S3gye8MzbqVZFDzfJd4Gk.
ECDSA key fingerprint is MD5:fa:5a:88:23:49:60:9b:b8:7e:4b:14:4b:3f:cd:96:a0.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.18.130' (ECDSA) to the list of known hosts.
root@192.168.18.130's password:
etcd                                                       100%  518   816.5KB/s   00:00
etcd                                                       100%   18MB  87.4MB/s   00:00
etcdctl                                                    100%   15MB 108.6MB/s   00:00
ca-key.pem                                                 100% 1679     1.3MB/s   00:00
ca.pem                                                     100% 1265   411.8KB/s   00:00
server-key.pem                                             100% 1675     1.4MB/s   00:00
server.pem                                                 100% 1338   639.5KB/s   00:00

Copy startup script to node

[root@master k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.18.129:/usr/lib/systemd/system/
root@192.168.18.129's password:
etcd.service                                               100%  923   283.4KB/s   00:00
[root@master k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.18.130:/usr/lib/systemd/system/
root@192.168.18.130's password:
etcd.service                                               100%  923   347.7KB/s   00:00

Node1 node configuration

Modify profile
[root@node1 ~]# systemctl stop firewalld.service
[root@node1 ~]# setenforce 0
[root@node1 ~]# vim /opt/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd02"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.18.129:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.18.129:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.18.129:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.18.129:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.18.128:2380,etcd02=https://192.168.18.148:2380,etcd03=https://192.168.18.129:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

[root@node1 ~]# systemctl start etcd
[root@node1 ~]# systemctl status etcd
● etcd.service - Etcd Server
   Loaded: loaded (/usr/lib/systemd/system/etcd.service; disabled; vendor preset: disabled)
   Active: active (running) since Three 2020-01-15 17:53:24 CST; 5s ago
# Status is Active

Node2 node configuration

# Modify profile
[root@node2 ~]# systemctl stop firewalld.service
[root@node2 ~]# setenforce 0
[root@node2 ~]# vim /opt/etcd/cfg/etcd
#[Member]
ETCD_NAME="etcd03"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.18.130:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.18.130:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.18.130:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.18.130:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.18.128:2380,etcd02=https://192.168.18.148:2380,etcd03=https://192.168.18.130:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

[root@node2 ~]# systemctl start etcd
[root@node2 ~]# systemctl status etcd
● etcd.service - Etcd Server
   Loaded: loaded (/usr/lib/systemd/system/etcd.service; disabled; vendor preset: disabled)
   Active: active (running) since Three 2020-01-15 17:55:24 CST; 5s ago
 #Status is Active

Cluster state validation in master:

# Go back to the master and enter the following command:
[root@master k8s]# cd etcd-cert/
[root@master etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.18.128:2379,https://192.168.18.129:2379,https://192.168.18.130:2379" cluster-health
member 9104d301e3b6da41 is healthy: got healthy result from https://192.168.18.129:2379
member 92947d71c72a884e is healthy: got healthy result from https://192.168.18.130:2379
member b2a6d67e1bc8054b is healthy: got healthy result from https://192.168.18.128:2379
cluster is healthy
#Health status

Deployment of docker engine by two servers

node1:

# Install dependency package
[root@node1 ~]# yum install yum-utils device-mapper-persistent-data lvm2 -y
#Set alicloud image source
[root@node1 ~]# yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
#Install docker CE
[root@node1 ~]# yum install -y docker-ce
#Start Docker and set it to power on and start automatically
[root@node1 ~]# systemctl start docker.service
[root@node1 ~]# systemctl enable docker.service
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
[root@node1 ~]# ps aux | grep docker
root       5551  0.1  3.6 565460 68652 ?        Ssl  09:13   0:00 /usr/bin/docke d -H fd:// --containerd=/run/containerd/containerd.sock
root       5759  0.0  0.0 112676   984 pts/1    R+   09:16   0:00 grep --color=auto docker

[root@node1 ~]# tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://w1ogxqvl.mirror.aliyuncs.com"]
}
EOF

echo 'net.ipv4.ip_forward=1' > /etc/sysctl.cnf
sysctl -p

[root@node1 ~]# service network restart
Restarting network (via systemctl):                        [  Determine  ]
[root@node1 ~]# systemctl restart docker
[root@node1 ~]# systemctl daemon-reload
[root@node1 ~]# systemctl restart docker

node2:

[root@node2 ~]# yum install yum-utils device-mapper-persistent-data lvm2 -y
[root@node2 ~]# yum-config-manager --add-repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
[root@node2 ~]# yum install -y docker-ce
[root@node2 ~]# systemctl start docker.service
[root@node2 ~]# systemctl enable docker.service
Created symlink from /etc/systemd/system/multi-user.target.wants/docker.service to /usr/lib/systemd/system/docker.service.
[root@node2 ~]# ps aux | grep docker
root       5570  0.5  3.5 565460 66740 ?        Ssl  09:18   0:00 /usr/bin/docke d -H fd:// --containerd=/run/containerd/containerd.sock
root       5759  0.0  0.0 112676   984 pts/1    R+   09:18   0:00 grep --color=auto docker
[root@node2 ~]# tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://w1ogxqvl.mirror.aliyuncs.com"]
}
EOF
[root@node2 ~]# service network restart
Restarting network (via systemctl):                        [  Determine  ]
[root@node2 ~]# systemctl restart docker
[root@node2 ~]# systemctl daemon-reload
[root@node2 ~]# systemctl restart docker

flannel network configuration

Write the allocated subnet segment in master to ETCD for flannel to use

[root@master etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.18.128:2379,https://192.168.18.129:2379,https://192.168.18.130:2379" set /coreos.com/network/config '{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}'
{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}

View information written

[root@master etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.18.128:2379,https://192.168.18.129:2379,https://192.168.18.130:2379" get /coreos.com/network/config
{ "Network": "172.17.0.0/16", "Backend": {"Type": "vxlan"}}

Copy the flannel package to all node nodes

[root@master etcd-cert]# cd ../
[root@master k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.18.129:/root
root@192.168.18.129's password:
flannel-v0.10.0-linux-amd64.tar.gz             100% 9479KB  55.6MB/s   00:00
[root@master k8s]# scp flannel-v0.10.0-linux-amd64.tar.gz root@192.168.18.130:/root
root@192.168.18.130's password:
flannel-v0.10.0-linux-amd64.tar.gz             100% 9479KB  69.5MB/s   00:00

Decompress all node s

#node1 node
[root@node1 ~]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz
[root@node1 ~]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p
[root@node1 ~]# mv mk-docker-opts.sh flanneld /opt/kubernetes/bin/
[root@node1 ~]# vim flannel.sh
#!/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

Turn on the flannel network function

[root@node1 ~]# bash flannel.sh https://192.168.18.128:2379,https://192.168.18.129:2379,https://192.168.18.130:2379
Created symlink from /etc/systemd/system/multi-user.target.wants/flanneld.service to /usr/lib/systemd/system/flanneld.service.

Configure docker connection flannel

[root@node1 ~]# vim /usr/lib/systemd/system/docker.service
#The service section is changed as follows
9 [Service]
10 Type=notify
11 # the default is not to use systemd for cgroups because the delegate issues s    till
12 # exists and systemd currently does not support the cgroup feature set requir    ed
13 # for containers run by docker
14 EnvironmentFile=/run/flannel/subnet.env  
15 ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/run    /containerd/containerd.sock     
16 ExecReload=/bin/kill -s HUP $MAINPID
17 TimeoutSec=0
18 RestartSec=2
19 Restart=always
#After modification, press Esc to exit the insertion mode, enter: wq to save and exit

[root@node1 ~]# cat /run/flannel/subnet.env
DOCKER_OPT_BIP="--bip=172.17.32.1/24"
DOCKER_OPT_IPMASQ="--ip-masq=false"
DOCKER_OPT_MTU="--mtu=1450"
DOCKER_NETWORK_OPTIONS=" --bip=172.17.32.1/24 --ip-masq=false --mtu=1450"
#Here bip specifies the subnet at startup

Restart docker service

[root@node1 ~]# systemctl daemon-reload
[root@node1 ~]# systemctl restart docker

View the flannel network

[root@node1 ~]# ifconfig
flannel.1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        inet 172.17.32.0  netmask 255.255.255.255  broadcast 0.0.0.0
        inet6 fe80::344b:13ff:fecb:1e2d  prefixlen 64  scopeid 0x20<link>
        ether 36:4b:13:cb:1e:2d  txqueuelen 0  (Ethernet)
        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 27 overruns 0  carrier 0  collisions 0

node2:

[root@node2 ~]# tar zxvf flannel-v0.10.0-linux-amd64.tar.gz
[root@node2 ~]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p
[root@node2 ~]# mv mk-docker-opts.sh flanneld /opt/kubernetes/bin/
[root@node2 ~]# vim flannel.sh
#!/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

Turn on the flannel network function

[root@node2 ~]# bash flannel.sh https://192.168.18.128:2379,https://192.168.18.129:2379,https://192.168.18.130:2379
Created symlink from /etc/systemd/system/multi-user.target.wants/flanneld.service to /usr/lib/systemd/system/flanneld.service.

Configure docker connection flannel

[root@node2 ~]# vim /usr/lib/systemd/system/docker.service
#The service section is changed as follows
9 [Service]
10 Type=notify
11 # the default is not to use systemd for cgroups because the delegate issues s    till
12 # exists and systemd currently does not support the cgroup feature set requir    ed
13 # for containers run by docker
14 EnvironmentFile=/run/flannel/subnet.env      
15 ExecStart=/usr/bin/dockerd $DOCKER_NETWORK_OPTIONS -H fd:// --containerd=/run    /containerd/containerd.sock 
16 ExecReload=/bin/kill -s HUP $MAINPID
17 TimeoutSec=0
18 RestartSec=2
19 Restart=always
#After modification, press Esc to exit the insertion mode, enter: wq to save and exit

[root@node2 ~]# cat /run/flannel/subnet.env
DOCKER_OPT_BIP="--bip=172.17.40.1/24"
DOCKER_OPT_IPMASQ="--ip-masq=false"
DOCKER_OPT_MTU="--mtu=1450"
DOCKER_NETWORK_OPTIONS=" --bip=172.17.40.1/24 --ip-masq=false --mtu=1450"
#Here bip specifies the subnet at startup

Restart docker service

[root@node2 ~]# systemctl daemon-reload
[root@node2 ~]# systemctl restart docker

View the flannel network

[root@node2 ~]# ifconfig
flannel.1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1450
        inet 172.17.40.0  netmask 255.255.255.255  broadcast 0.0.0.0
        inet6 fe80::cc6f:baff:fe89:3b93  prefixlen 64  scopeid 0x20<link>
        ether ce:6f:ba:89:3b:93  txqueuelen 0  (Ethernet)
        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 240 overruns 0  carrier 0  collisions 0

Test ping to prove that flannel plays a routing role through the other docker0 network card

[root@localhost ~]# 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

//Test the centos:7 container in the two node s again

Deploy master components

Operate on the master, API server generates certificate

Archive:  master.zip
  inflating: apiserver.sh
  inflating: controller-manager.sh
  inflating: scheduler.sh
[root@master k8s]# mkdir /opt/kubernetes/{cfg,bin,ssl} -p

#Create apiserver self signed certificate directory
[root@master k8s]# mkdir k8s-cert
[root@master k8s]# cd k8s-cert/
[root@master k8s-cert]# ls      
k8s-cert.sh

#Establish ca certificate
[root@master k8s-cert]# cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF

[root@master k8s-cert]# cat > ca-csr.json <<EOF
{
    "CN": "kubernetes",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Nanjing",
            "ST": "Nanjing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF

[root@master k8s-cert]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
2020/02/05 10:15:09 [INFO] generating a new CA key and certificate from CSR
2020/02/05 10:15:09 [INFO] generate received request
2020/02/05 10:15:09 [INFO] received CSR
2020/02/05 10:15:09 [INFO] generating key: rsa-2048
2020/02/05 10:15:09 [INFO] encoded CSR
2020/02/05 10:15:09 [INFO] signed certificate with serial number 154087341948227448402053985122760482002707860296

#Establishing an apiserver certificate
[root@master k8s-cert]# cat > server-csr.json <<EOF
{
    "CN": "kubernetes",
    "hosts": [
      "10.0.0.1",
      "127.0.0.1",
      "192.168.18.128",     #master1(centos 7-3)
      "192.168.18.140",     #master2(mini-1)
      "192.168.18.100",     #vip (for self setting load balancing)
      "192.168.18.141",     #lb (mini-2)
      "192.168.18.142",     #lb (mini-3)
      "kubernetes",
      "kubernetes.default",
      "kubernetes.default.svc",
      "kubernetes.default.svc.cluster",
      "kubernetes.default.svc.cluster.local"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "NanJing",
            "ST": "NanJing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF

[root@master k8s-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
2020/02/05 11:43:47 [INFO] generate received request
2020/02/05 11:43:47 [INFO] received CSR
2020/02/05 11:43:47 [INFO] generating key: rsa-2048
2020/02/05 11:43:47 [INFO] encoded CSR
2020/02/05 11:43:47 [INFO] signed certificate with serial number 359419453323981371004691797080289162934778938507
2020/02/05 11:43:47 [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").

#Establish admin certificate
[root@master k8s-cert]# cat > admin-csr.json <<EOF
{
  "CN": "admin",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "NanJing",
      "ST": "NanJing",
      "O": "system:masters",
      "OU": "System"
    }
  ]
}
EOF

[root@master k8s-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes admin-csr.json | cfssljson -bare admin
2020/02/05 11:46:04 [INFO] generate received request
2020/02/05 11:46:04 [INFO] received CSR
2020/02/05 11:46:04 [INFO] generating key: rsa-2048
2020/02/05 11:46:04 [INFO] encoded CSR
2020/02/05 11:46:04 [INFO] signed certificate with serial number 361885975538105795426233467824041437549564573114
2020/02/05 11:46:04 [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").

#Establish Kube proxy certificate
[root@master k8s-cert]# cat > kube-proxy-csr.json <<EOF
{
  "CN": "system:kube-proxy",
  "hosts": [],
  "key": {
    "algo": "rsa",
    "size": 2048
  },
  "names": [
    {
      "C": "CN",
      "L": "NanJing",
      "ST": "NanJing",
      "O": "k8s",
      "OU": "System"
    }
  ]
}
EOF

[root@master k8s-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes kube-proxy-csr.json | cfssljson -bare kube-proxy
2020/02/05 11:47:55 [INFO] generate received request
2020/02/05 11:47:55 [INFO] received CSR
2020/02/05 11:47:55 [INFO] generating key: rsa-2048
2020/02/05 11:47:56 [INFO] encoded CSR
2020/02/05 11:47:56 [INFO] signed certificate with serial number 34747850270017663665747172643822215922289240826
2020/02/05 11:47:56 [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").

Generate k8s certificate

[root@master k8s-cert]# bash k8s-cert.sh
2020/02/05 11:50:08 [INFO] generating a new CA key and certificate from CSR
2020/02/05 11:50:08 [INFO] generate received request
2020/02/05 11:50:08 [INFO] received CSR
2020/02/05 11:50:08 [INFO] generating key: rsa-2048
2020/02/05 11:50:08 [INFO] encoded CSR
2020/02/05 11:50:08 [INFO] signed certificate with serial number 473883155883308900863805079252124099771123043047
2020/02/05 11:50:08 [INFO] generate received request
2020/02/05 11:50:08 [INFO] received CSR
2020/02/05 11:50:08 [INFO] generating key: rsa-2048
2020/02/05 11:50:08 [INFO] encoded CSR
2020/02/05 11:50:08 [INFO] signed certificate with serial number 66483817738746309793417718868470334151539533925
2020/02/05 11:50:08 [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").
2020/02/05 11:50:08 [INFO] generate received request
2020/02/05 11:50:08 [INFO] received CSR
2020/02/05 11:50:08 [INFO] generating key: rsa-2048
2020/02/05 11:50:08 [INFO] encoded CSR
2020/02/05 11:50:08 [INFO] signed certificate with serial number 245658866069109639278946985587603475325871008240
2020/02/05 11:50:08 [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").
2020/02/05 11:50:08 [INFO] generate received request
2020/02/05 11:50:08 [INFO] received CSR
2020/02/05 11:50:08 [INFO] generating key: rsa-2048
2020/02/05 11:50:09 [INFO] encoded CSR
2020/02/05 11:50:09 [INFO] signed certificate with serial number 696729766024974987873474865496562197315198733463
2020/02/05 11:50:09 [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@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 ..

#Decompress kubernetes
[root@master k8s]# tar zxvf kubernetes-server-linux-amd64.tar.gz
[root@master k8s]# cd /root/k8s/kubernetes/server/bin
#Copy critical command file
[root@master bin]# cp kube-apiserver kubectl kube-controller-manager kube-scheduler /opt/kubernetes/bin/
[root@master k8s]# cd /root/k8s
#Randomly generated serial number
[root@master k8s]# head -c 16 /dev/urandom | od -An -t x | tr -d ' '
9b3186df3dc799376ad43b6fe0108571

[root@master k8s]# vim /opt/kubernetes/cfg/token.csv
9b3186df3dc799376ad43b6fe0108571,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
#Serial number, user name, id, role

Binary file, token and certificate are ready. Open apiserver

[root@master k8s]# bash apiserver.sh 192.168.18.128 https://192.168.18.128:2379,https://192.168.18.148:2379,https://192.168.18.130:2379
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-apiserver.service to /usr/lib/systemd/system/kube-apiserver.service.

Check if the process started successfully

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

View profile

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

KUBE_APISERVER_OPTS="--logtostderr=true \
--v=4 \
--etcd-servers=https://192.168.18.128:2379,https://192.168.18.129:2379,https://192.168.18.130:2379 \
--bind-address=192.168.18.128 \
--secure-port=6443 \
--advertise-address=192.168.18.128 \
--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"

https port listening

[root@master k8s]# netstat -ntap | grep 6443
tcp        0      0 192.168.18.128:6443     0.0.0.0:*               LISTEN      8146/kube-apiserver
tcp        0      0 192.168.18.128:6443     192.168.18.128:56724    ESTABLISHED 8146/kube-apiserver
tcp        0      0 192.168.18.128:56724    192.168.18.128:6443     ESTABLISHED 8146/kube-apiserver
[root@master k8s]# netstat -ntap | grep 8080
tcp        0      0 127.0.0.1:8080          0.0.0.0:*               LISTEN      8146/kube-apiserver
......Several lines are omitted below

Start the scheduler service

[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    6212  0.0  0.0  91732  1364 ?        S    11:29   0:00 pickup -l -t unix -u
root       7034  1.1  1.0  45360 20332 ?        Ssl  12:23   0:00 /opt/kubernetes/bin/kube-scheduler --logtostderr=true --v=4 --master=127.0.0.1:8080 --leader-elect
root       7042  0.0  0.0 112676   980 pts/1    R+   12:23   0:00 grep --color=auto ku
[root@master k8s]# chmod +x controller-manager.sh

Start 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.

View master node status

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

Node node deployment

Copy the kubelet and Kube proxy on the master to the node node

[root@master k8s]# cd kubernetes/server/bin/
[root@master bin]# scp kubelet kube-proxy root@192.168.18.129:/opt/kubernetes/bin/
root@192.168.18.129's password:
kubelet                                                                100%  168MB  81.1MB/s   00:02
kube-proxy                                                             100%   48MB  77.6MB/s   00:00
[root@master bin]# scp kubelet kube-proxy root@192.168.18.130:/opt/kubernetes/bin/
root@192.168.18.130's password:
kubelet                                                                100%  168MB  86.8MB/s   00:01
kube-proxy                                                             100%   48MB  90.4MB/s   00:00

node1 node operation (upload node.zip to the / root directory and extract)

[root@node1 ~]# ls
anaconda-ks.cfg  flannel-v0.10.0-linux-amd64.tar.gz  node.zip   Public video document music
flannel.sh       initial-setup-ks.cfg                README.md  Template picture download desktop
[root@node1 ~]# unzip node.zip
Archive:  node.zip
  inflating: proxy.sh
  inflating: kubelet.sh

Operation on master

[root@master bin]# cd /root/k8s/
[root@master k8s]# mkdir kubeconfig
[root@master k8s]# cd kubeconfig/

Copy kubeconfig.sh file to rename

[[root@localhost kubeconfig]# mv kubeconfig.sh kubeconfig
[root@localhost kubeconfig]# vim kubeconfig 
#-----------------------Delete the following sections--------------------------------
# Create 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
#-----------------------------------------------------------------

# Get token information
[root@localhost ~]# cat /opt/kubernetes/cfg/token.csv 
6351d652249951f79c33acdab329e4c4,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
# Change the configuration file to tokenID
# Set client authentication parameters
kubectl config set-credentials kubelet-bootstrap \
  --token=6351d652249951f79c33acdab329e4c4 \
  --kubeconfig=bootstrap.kubeconfig

Setting environment variables (can be written to / etc/profile)

[root@master kubeconfig]# vim /etc/profile
#Press capital G to the last line and lowercase o to insert
export PATH=$PATH:/opt/kubernetes/bin/
#After modification, press Esc to exit the insertion mode, enter: wq to save and exit
[root@master kubeconfig]# source /etc/profile

[root@master kubeconfig]# 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"}
[root@master kubeconfig]# kubectl get node
No resources found.
#No nodes have been added at this time

Build profile

[root@master kubeconfig]# bash kubeconfig 192.168.18.128 /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@master kubeconfig]# ls
bootstrap.kubeconfig  kubeconfig  kube-proxy.kubeconfig

Copy configuration file to node node

[root@master kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.18.148:/opt/kubernetes/cfg/
root@192.168.18.129's password:
bootstrap.kubeconfig                                                              100% 2168     2.2MB/s   00:00
kube-proxy.kubeconfig                                                             100% 6270     3.5MB/s   00:00
[root@master kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.18.145:/opt/kubernetes/cfg/
root@192.168.18.130's password:
bootstrap.kubeconfig                                                              100% 2168     3.1MB/s   00:00
kube-proxy.kubeconfig                                                             100% 6270     7.9MB/s   00:00

Create bootstrap role grant permission to connect to apiserver request signature (key step)

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

Operate on node01 node

[root@node1 ~]# bash kubelet.sh 192.168.18.129
Created symlink from /etc/systemd/system/multi-user.target.wants/kubelet.service to /usr/lib/systemd/system/kubelet.service.

Check kubelet service startup

[root@node1 ~]# ps aux | grep kube
root       8807  0.0  0.8 300512 16260 ?        Ssl  09:45   0:05 /opt/kubernetes/bin/flanneld --ip-masq --etcd-endpoints=https://192.168.18.128:2379,https://192.168.18.129:2379,https://192.168.18.130:2379 -etcd-cafile=/opt/etcd/ssl/ca.pem -etcd-certfile=/opt/etcd/ssl/server.pem -etcd-keyfile=/opt/etcd/ssl/server-key.pem
root      35040  0.4  2.1 369632 40832 ?        Ssl  14:53   0:00 /opt/kubernetes/bin/kubelet --logtostderr=true --v=4 --hostname-override=192.168.18.148 --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      35078  0.0  0.0 112676   984 pts/1    S+   14:54   0:00 grep --color=auto kube

[root@node1 ~]# systemctl status kubelet.service
● kubelet.service - Kubernetes Kubelet
   Loaded: loaded (/usr/lib/systemd/system/kubelet.service; enabled; vendor preset: disabled)
   Active: active (running) since Three 2020-02-05 14:54:45 CST; 21s ago
#running

Request to check nodes on master

node1 Will automatically find apiserver Go ahead and apply for the certificate, and we can check it node01 Node's request
[root@master kubeconfig]# kubectl get csr
NAME                                                   AGE   REQUESTOR           CONDITION
node-csr-ZZnDyPkUICga9NeuZF-M8IHTmpekEurXtbHXOyHZbDg   18s   kubelet-bootstrap   Pending
#At this time, the status is Pending, waiting for the cluster to issue a certificate to the node

#Continue to view certificate status
[root@master kubeconfig]# kubectl get csr
NAME                                                   AGE     REQUESTOR           CONDITION
node-csr-ZZnDyPkUICga9NeuZF-M8IHTmpekEurXtbHXOyHZbDg   3m59s   kubelet-bootstrap   Approved,Issued
#At this time, the status is approved and issued has been allowed to join the cluster

View cluster nodes and successfully join node1 node

[root@master kubeconfig]# kubectl get node
NAME             STATUS   ROLES    AGE     VERSION
192.168.18.129   Ready    <none>   6m54s   v1.12.3

Operate at node1 node, start proxy service

[root@node1 ~]# bash proxy.sh 192.168.195.129
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 Four 2020-02-06 11:11:56 CST; 20s ago
#running

node2 node deployment

Operate on node node01
Copy the existing / opt/kubernetes directory to other nodes for modification

[root@node1 ~]# scp -r /opt/kubernetes/ root@192.168.18.130:/opt/
The authenticity of host '192.168.18.130 (192.168.18.130)' can't be established.
ECDSA key fingerprint is SHA256:mTT+FEtzAu4X3D5srZlz93S3gye8MzbqVZFDzfJd4Gk.
ECDSA key fingerprint is MD5:fa:5a:88:23:49:60:9b:b8:7e:4b:14:4b:3f:cd:96:a0.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.18.130' (ECDSA) to the list of known hosts.
root@192.168.18.130's password:
flanneld                                                  100%  238   572.7KB/s   00:00
bootstrap.kubeconfig                                      100% 2168     4.9MB/s   00:00
kube-proxy.kubeconfig                                     100% 6270    12.0MB/s   00:00
kubelet                                                   100%  378   642.2KB/s   00:00
kubelet.config                                            100%  268   565.0KB/s   00:00
kubelet.kubeconfig                                        100% 2297     3.5MB/s   00:00
kube-proxy                                                100%  191   396.6KB/s   00:00
mk-docker-opts.sh                                         100% 2139     3.2MB/s   00:00
scp: /opt//kubernetes/bin/flanneld: Text file busy
kubelet                                                   100%  168MB  96.9MB/s   00:01
kube-proxy                                                100%   48MB 108.9MB/s   00:00
kubelet.crt                                               100% 2193     2.4MB/s   00:00
kubelet.key                                               100% 1675     2.5MB/s   00:00
kubelet-client-2020-02-06-11-03-32.pem                    100% 1277     2.2MB/s   00:00
kubelet-client-current.pem                                100% 1277   684.2KB/s   00:00
#Copy the service files of kubelet and Kube proxy in node1 to node2
[root@node1 ~]# scp /usr/lib/systemd/system/{kubelet,kube-proxy}.service root@192.168.18.130:/usr/lib/systemd/system/
root@192.168.18.130's password:
kubelet.service                                           100%  264   291.3KB/s   00:00
kube-proxy.service                                        100%  231   407.8KB/s   00:00
``
**reach node2 First, delete the copied certificate, and then node2 Will apply for certificate**

[root@node2 ~]# cd /opt/kubernetes/ssl/
[root@node2 ssl]# rm -rf *

**Modify the configuration file kubelet kubelet.config Kube proxy (three configuration files)**

[root@node2 ssl]# cd ../cfg/
[root@node2 cfg]# vim kubelet
4 --hostname-override=192.168.18.129 \
#After modification, press Esc to exit the insertion mode, enter: wq to save and exit

[root@node2 cfg]# vim kubelet.config
4 address: 192.168.18.130
#After modification, press Esc to exit the insertion mode, enter: wq to save and exit

[root@node2 cfg]# vim kube-proxy
4 -- hostname override = 192.168.195.130, line 4, change to the IP address of node2 node
#After modification, press Esc to exit the insertion mode, enter: wq to save and exit

**Start service**

[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.

View node2 node request on master

[root@master k8s]# kubectl get csr
NAME AGE REQUESTOR CONDITION
node-csr-QtKJLeSj130rGIccigH6-MKH7klhymwDxQ4rh4w8WJA 99s kubelet-bootstrap Pending

**Licensing to join a cluster**

[root@master k8s]# kubectl certificate approve node-csr-QtKJLeSj130rGIccigH6-MKH7klhymwDxQ4rh4w8WJA
certificatesigningrequest.certificates.k8s.io/node-csr-QtKJLeSj130rGIccigH6-MKH7klhymwDxQ4rh4w8WJA approved

**View nodes in the cluster**

[root@master k8s]# kubectl get node
NAME STATUS ROLES AGE VERSION
192.168.18.130 Ready <none> 28s v1.12.3
192.168.18.129 Ready <none> 26m v1.12.3
#At this time, both nodes have joined the cluster

Tags: Kubernetes kubelet Docker SSL

Posted on Mon, 10 Feb 2020 05:51:55 -0500 by dreamscape