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K8S 快速部署(单master)(01)

October 1, 2019 • Read: 49 • kubernetes阅读设置

本文适用于有linux 基础,网络基础,安全基础的童鞋阅读。

1、规划

1.1架构规划
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1.2 服务器配置规划
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1.3 软件版本规划
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1.4 证书规划
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2、安装过程

2.1、关闭关闭所有服务器的selinux和防火墙

systemctl stop firewalld.service          
systemctl disable firewalld.service       
vi /etc/selinux/config

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2.2 修改主机名

vi /etc/hostname

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reboot 重启所有服务器

3、生成证书

3.1创建目录

mkdir k8s-cert
mkdir etcd-cert
cd etcd-cert/

3.2安装cfssl

wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Deploy/cfssl.sh
chmod +x cfssl.sh
./cfssl.sh

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3.3生成证书

wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Deploy/etcd-cert.sh
chmod +x etcd-cert.sh
vi etcd-cert.sh

根据实际情况替换为自己规划的IP
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./etcd-cert.sh

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4、安装etcd

4.1创建软件安装包存放目录并下载软件

mkdir soft
cd soft/
wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Soft/etcd-v3.3.10-linux-amd64.tar.gz
tar zxvf etcd-v3.3.10-linux-amd64.tar.gz
cd etcd-v3.3.10-linux-amd64/
mkdir /opt/etcd/{cfg,bin,ssl} -p
mv etcd etcdctl /opt/etcd/bin/

4.2下载安装脚本并执行安装

wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Deploy/etcd.sh
chmod +x etcd.sh 

根据实际情况替换IP

./etcd.sh etcd01 192.168.3.200 etcd02=https://192.168.3.202:2380,etcd03=https://192.168.3.203:2380

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4.3拷贝证书

cp /data/etcd-cert/{ca,server-key,server}.pem /opt/etcd/ssl/

4.4拷贝配置到其他节点
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拷贝etcd.service

4.5登录其它节点修改配置

cd /opt/etcd/cfg/
vi etcd

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4.6 在所有节点启动etcd

systemctl daemon-reload
systemctl start etcd

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systemctl enable etcd

4.7 验证集群状态,IP替换为实际IP

/opt/etcd/bin/etcdctl --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.3.200:2379,https://192.168.3.202:2379,https://192.168.3.203:2379" cluster-health

5、在node节点安装docker

5.1安装必要的一些系统工具

yum install -y yum-utils device-mapper-persistent-data lvm2

5.2添加软件源信息

yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo

5.3更新并安装 Docker-CE

yum makecache fast
yum -y install docker-ce

5.4配置 daocloud docker 加速器

curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://f1361db2.m.daocloud.io

5.5重启docker 服务

systemctl restart docker

6、在node节点安装flanneld网络插件

6.1分配容器网络,讲数据写入etcd,IP根据实际情况修改,172.16.0.0/16是容器网络。

/opt/etcd/bin/etcdctl --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.3.200:2379,https://192.168.3.202:2379,https://192.168.3.203:2379" set /coreos.com/network/config '{ "Network": "172.16.0.0/16", "Backend": {"Type": "vxlan"}}'

查看配置

/opt/etcd/bin/etcdctl --ca-file=/opt/etcd/ssl/ca.pem --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.3.200:2379,https://192.168.3.202:2379,https://192.168.3.203:2379" get /coreos.com/network/config

6.2 下载flanneld网络插件并执行安装

wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Soft/flannel-v0.10.0-linux-amd64.tar.gz

解压

tar -zxvf flannel-v0.10.0-linux-amd64.tar.gz

下载安装脚本

wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Deploy/flannel.sh

创建工作目录

mkdir /opt/kubernetes/{bin,cfg,ssl} -p

移动安装文件

mv flanneld mk-docker-opts.sh /opt/kubernetes/bin/

执行安装

./flannel.sh https://192.168.3.200:2379,https://192.168.3.202:2379,https://192.168.3.203:2379

重启docker

systemctl restart docker

查看docker0是否获取flannel分配的IP

ifconfig

7、在master01 节点部署apiserver

7.1下载安装包

wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Soft/kubernetes-server-linux-amd64.tar.gz
wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Deploy/master/apiserver.sh
wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Deploy/master/controller-manager.sh
wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Deploy/master/scheduler.sh

解压

tar -zxvf kubernetes-server-linux-amd64.tar.gz

7.2安装过程

创建安装目录

mkdir -p /opt/kubernetes/{bin,cfg,ssl} -p

进入解压目录

cd kubernetes/server/bin/

拷贝

cp kube-apiserver kube-controller-manager kube-scheduler /opt/kubernetes/bin/

执行安装

chmod + apiserver.sh
./apiserver.sh 192.168.3.200 https://192.168.3.200:2379,https://192.168.3.202:2379,https://192.168.3.203:2379

指定日志目录

mkdir  /data/logs
vi /opt/kubernetes/cfg/kube-apiserver

将true替换为false

KUBE_APISERVER_OPTS="--logtostderr=true \

替换为

KUBE_APISERVER_OPTS="--logtostderr=false \

插入一行

--log-dir= /data/logs  \

7.3 为k8s生成证书

cd /data/k8s-cert/
wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Deploy/k8s-cert.sh
chmod +x k8s-cert.sh

执行脚本

./k8s-cert.sh

拷贝证书

cp ca.pem server.pem server-key.pem ca-key.pem /opt/kubernetes/ssl/

7.4生产token文件

wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Deploy/kubeconfig.sh
chmod +x kubeconfig.sh

执行生产csv

./kubeconfig.sh

移动配置文件

mv token.csv  /opt/kubernetes/cfg/

7.5、启动apiserver

systemctl  start kube-apiserver
systemctl enable kube-apiserver

8、在master01上安装kube-controller-manager

 chmod +x controller-manager.sh
./controller-manager.sh 127.0.0.1
systemctl enable kube-controller-manger

按照apiserver配置方法修改日志存放路径

vi /opt/kubernetes/cfg/kube-controller-manager

9、在master01上安装kube-scheduler

chmod +x scheduler.sh
./scheduler.sh 127.0.0.1
systemctl enable kube-controller-manger

按照apiserver配置方法修改日志存放路径

10、使用kubectl管理工具

cp kubernetes/server/bin/kubectl  /usr/bin/

查看集群状态

kubectl get cs

11、部署k8s node

11.1将kubelet-bootstrap用户绑定到系统集群角色

kubectl create clusterrolebinding kubelet-bootstrap \
--clusterrole=system:node-bootstrapper \
--user=kubelet-bootstrap

11.2创建kubeconfig文件
下载配置脚本

wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Deploy/kubeconfig.sh

查看token

cat /opt/kubernetes/cfg/token.csv

注释掉token创建章节

vi kubeconfig.sh
# 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

添加token信息

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

APISERVER=$1
SSL_DIR=$2
BOOTSTRAP_TOKEN=0fb61c46f8991b718eb38d27b605b008

执行

chmod  +x kubeconfig.sh

./kubeconfig.sh  192.168.3.200 /data/k8s-cert/

11.3拷贝配置文件到node节点

scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.3.202:/opt/kubernetes/cfg/
scp bootstrap.kubeconfig kube-proxy.kubeconfig root@192.168.3.203:/opt/kubernetes/cfg/
cd /data/kubernetes/server/bin
scp kubelet kube-proxy root@192.168.3.202:/opt/kubernetes/bin/
scp kubelet kube-proxy root@192.168.3.203:/opt/kubernetes/bin/

11.4 下载node节点安装包

wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Deploy/node/kubelet.sh
wget https://tenthpinnemo.s3.cn-northwest-1.amazonaws.com.cn/Deploy/node/proxy.sh

添加执行权限

chmod +x kubelet.sh
chmod +x proxy.sh

分别在各自节点执行,如在192.168.3.202执行

./kubelet.sh 192.168.3.202

vi /opt/kubernetes/cfg/kubelet.config

在末尾添加

authentication:
  anonymous:
    enabled: true   

   

绑定角色

11.5在master允许node加入集群neme为每个节点的具体值

kubectl get csr
kubectl certificate approve +name

绑定角色

 kubectl create clusterrolebinding cluster-system-anonymous --clusterrole=cluster-admin --user=system:anonymous

查看节点

kubectl get node

12、安装kube-proxy,分别在各个节点执行,如在192.168.3.202执行

./proxy.sh 192.168.3.202
 systemctl enable kube-proxy

13、node扩容

13.1拷贝配置文件

scp -r /opt/kubernetes/ root@目标IP:/opt/
scp /usr/lib/systemd/system/{kubelet,kube-proxy}.service  root@目标IP:/usr/lib/systemd/system/

13.2 进入节点ssl目录删除文件

cd /opt/kubernetes/ssl/
rm -rf  *

13.3修改IP

cd /opt/kubernetes/cfg/

修改

kubelet,kubelet.config,kube-proxy

为当前节点IP

启动

systemctl restart kubelet
systemctl restart kube-proxy

同上在msater颁发证书

14测试

14.1 登陆master创建一个nginx

kubectl run nginx --image=nginx

查看镜像

kubectl get pods

14.2创建地址映射

kubectl expose deployment nginx --port=80 --target-port=80 --type=NodePort

14.3 查看容易所在节点

kubectl get pods -o wide

14.4查看映射的端口,80右侧的端口即为外部访问端口

kubectl get svc

14.5通过任意node ip + 外部端口访问nginx

14.6查看日志

kubectl get pods

15部署UI

15.1进入安装目录解压安装包

cd /data/kubernetes/
tar -zxvf kubernetes-src.tar.gz
cd cluster/
cd addons/dashboard/
kubectl create -f dashboard-configmap.yaml
kubectl create -f dashboard-rbac.yaml
kubectl create -f dashboard-secret.yaml

修改iamge镜像源vi dashboard-controller.yaml

registry.cn-hangzhou.aliyuncs.com/google_containers/kubernetes-dashboard-amd64:v1.10.0

创建

kubectl create -f dashboard-controller.yaml

查看

kubectl get pods -n kube-system

查看日志红色部分根据实际情况替换

kubectl logs kubernetes-dashboard-6bff7dc67d-6gw78 -n kube-system

15.2 创建service

vi dashboard-service.yaml

spec:
  type: NodePort
kubectl create -f dashboard-service.yaml

查看端口信息

kubectl get svc -n kube-system

15.3 配置token登陆信息

vi k8s-admin.yaml
apiVersion: v1
kind: ServiceAccount
metadata:
  name: dashboard-admin
  namespace: kube-system
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1beta1
metadata:
  name: dashboard-admin
subjects:
  - kind: ServiceAccount
    name: dashboard-admin
    namespace: kube-system
roleRef:
  kind: ClusterRole
  name: cluster-admin
  apiGroup: rbac.authorization.k8s.io

创建

kubectl -f k8s-admin.yaml

15.4 获取name

kubectl get secret -n kube-system

获取密钥name 以实际情况为准

kubectl describe secret dashboard-admin-token-9rh2s -n kube-system

15.5 访问任意 https:// node ip +端口

使用token值登陆

兼总条贯 知至知终

最后编辑于: October 2, 2019