k8s-----------master&node配置
目录一、部署master组件二、node1节点三、node02节点部署之前的部署过程:1、etcd2、flannel一、部署master组件#在master上操作,api-server生成证书[root@localhost k8s]# unzip master.zip#将master.zip拖入到k8s目录下[root@localhost k8s]# mkdir /opt/kubernetes/{
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一、部署master组件
#在master上操作,api-server生成证书
[root@localhost k8s]# unzip master.zip #将master.zip拖入到k8s目录下
[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
vim 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",
"192.168.241.20", //master1
"192.168.241.5", //master2
"192.168.195.100", //vip
"192.168.241.6", //lb (master)
"192.168.241.7", //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
[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]# head -c 16 /dev/urandom | od -An -t x | tr -d ' ' #可以随机生成序列号
8abb9c19a937a44091a08bed462465f5
[root@localhost k8s]# vim /opt/kubernetes/cfg/token.csv
8abb9c19a937a44091a08bed462465f5,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
#二进制文件,token,证书都准备好,开启apiserver
[root@localhost k8s]# vim apiserver.sh
#!/bin/bash
MASTER_ADDRESS=$1
ETCD_SERVERS=$2
cat <<EOF >/opt/kubernetes/cfg/kube-apiserver
KUBE_APISERVER_OPTS="--logtostderr=true \\
--v=4 \\
--etcd-servers=${ETCD_SERVERS} \\
--bind-address=${MASTER_ADDRESS} \\
--secure-port=6443 \\
--advertise-address=${MASTER_ADDRESS} \\
--allow-privileged=true \\
--service-cluster-ip-range=10.0.0.0/24 \\
--enable-admission-plugins=NamespaceLifecycle,LimitRanger,ServiceAccount,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"
EOF
cat <<EOF >/usr/lib/systemd/system/kube-apiserver.service
[Unit]
Description=Kubernetes API Server
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-apiserver
ExecStart=/opt/kubernetes/bin/kube-apiserver \$KUBE_APISERVER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable kube-apiserver
systemctl restart kube-apiserver
[root@localhost k8s]# bash apiserver.sh 192.168.241.20 https://192.168.241.20:2379,https://192.168.241.3:2379,https://192.168.241.4:2379
[root@localhost k8s]# ps aux | grep kube
#监听的https端口
[root@localhost k8s]# netstat -ntap | grep 6443
[root@localhost k8s]# netstat -ntap | grep 8080
#启动scheduler服务
[root@localhost k8s]#vim scheduler.sh
#!/bin/bash
MASTER_ADDRESS=$1
cat <<EOF >/opt/kubernetes/cfg/kube-scheduler
KUBE_SCHEDULER_OPTS="--logtostderr=true \\
--v=4 \\
--master=${MASTER_ADDRESS}:8080 \\
--leader-elect"
EOF
cat <<EOF >/usr/lib/systemd/system/kube-scheduler.service
[Unit]
Description=Kubernetes Scheduler
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-scheduler
ExecStart=/opt/kubernetes/bin/kube-scheduler \$KUBE_SCHEDULER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable kube-scheduler
systemctl restart kube-scheduler
[root@localhost k8s]# ./scheduler.sh 127.0.0.1
[root@localhost k8s]# ps aux | grep kube
[root@localhost k8s]# chmod +x controller-manager.sh
[root@localhost k8s]# vim controller-manager.sh
#!/bin/bash
MASTER_ADDRESS=$1
cat <<EOF >/opt/kubernetes/cfg/kube-controller-manager
KUBE_CONTROLLER_MANAGER_OPTS="--logtostderr=true \\
--v=4 \\
--master=${MASTER_ADDRESS}:8080 \\
--leader-elect=true \\
--address=127.0.0.1 \\
--service-cluster-ip-range=10.0.0.0/24 \\
--cluster-name=kubernetes \\
--cluster-signing-cert-file=/opt/kubernetes/ssl/ca.pem \\
--cluster-signing-key-file=/opt/kubernetes/ssl/ca-key.pem \\
--root-ca-file=/opt/kubernetes/ssl/ca.pem \\
--service-account-private-key-file=/opt/kubernetes/ssl/ca-key.pem \\
--experimental-cluster-signing-duration=87600h0m0s"
EOF
cat <<EOF >/usr/lib/systemd/system/kube-controller-manager.service
[Unit]
Description=Kubernetes Controller Manager
Documentation=https://github.com/kubernetes/kubernetes
[Service]
EnvironmentFile=-/opt/kubernetes/cfg/kube-controller-manager
ExecStart=/opt/kubernetes/bin/kube-controller-manager \$KUBE_CONTROLLER_MANAGER_OPTS
Restart=on-failure
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable kube-controller-manager
systemctl restart kube-controller-manager
[root@localhost k8s]# ./controller-manager.sh 127.0.0.1
[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"}
二、node1节点
#master上操作
把 kubelet、kube-proxy拷贝到node节点上去
/root/k8s/kubernetes/server/bin
[root@localhost bin]# scp kubelet kube-proxy root@192.168.241.3:/opt/kubernetes/bin/
[root@localhost bin]# scp kubelet kube-proxy root@192.168.241.4:/opt/kubernetes/bin/
node01节点操作(复制node.zip到/root目录下再解压)
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
----------------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
${BOOTSTRAP_TOKEN},kubelet-bootstrap,10001,"system:kubelet-bootstrap"
EOF
#获取token信息(红色部分)
[root@localhost ~]# cat /opt/kubernetes/cfg/token.csv
6351d652249951f79c33acdab329e4c4,kubelet-bootstrap,10001,"system:kubelet-bootstrap"
#配置文件修改为tokenID
# 设置客户端认证参数
kubectl config set-credentials kubelet-bootstrap \
--token=6351d652249951f79c33acdab329e4c4 \
--kubeconfig=bootstrap.kubeconfig
设置环境变量(可以写入到/etc/profile中)
[root@localhost kubeconfig]# vim /etc/profile
export PATH=$PATH:/opt/kubernetes/bin/
[root@localhost kubeconfig]# source /etc/profile
[root@localhost kubeconfig]# kubectl get cs
#生成配置文件
[root@localhost kubeconfig]# bash kubeconfig 192.168.241.3 /root/k8s/k8s-cert/
[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@192.168.241.3:/opt/kubernetes/cfg/
[root@localhost kubeconfig]# scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.241.4:/opt/kubernetes/cfg/
#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
#在node01节点上操作
[root@localhost ~]# bash kubelet.sh 192.168.195.150
[root@localhost ~]# ps aux | grep 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
#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 192.168.241.3
三、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@192.168.241.4:/opt/
#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@192.168.241.4:/usr/lib/systemd/system/
#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
KUBELET_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.241.4 \
--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@localhost cfg]# vim kubelet.config
kind: KubeletConfiguration
apiVersion: kubelet.config.k8s.io/v1beta1
address: 192.168.241.4
port: 10250
readOnlyPort: 10255
cgroupDriver: cgroupfs
clusterDNS:
- 10.0.0.2
clusterDomain: cluster.local.
failSwapOn: false
authentication:
anonymous:
enabled: true
~
[root@localhost cfg]# vim kube-proxy
KUBE_PROXY_OPTS="--logtostderr=true \
--v=4 \
--hostname-override=192.168.241.4 \
--cluster-cidr=10.0.0.0/24 \
--proxy-mode=ipvs \
--kubeconfig=/opt/kubernetes/cfg/kube-proxy.kubeconfig"
#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
192.168.241.3 Ready <none> 28m v1.12.3
192.168.241.4 Ready <none> 6m58s v1.12.3
这里简单的单节点k8s已经部署完成了。。。后期会继续更新。。。
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