1、環境信息
1）新安裝三臺cenos虛擬機，保證三臺虛擬機可以互相ping通
master：192.168.32.100
node1:192.168.32.110
node2:192.168.32.120
2）關閉防火牆
[lxw@localhost yum.repos.d]$ sudo systemctl stop iptables
[sudo] lxw 的密碼：
Failed to stop iptables.service: Unit iptables.service not loaded.
[lxw@localhost yum.repos.d]$
3）基礎服務安裝
[lxw@localhost yum.repos.d]$ sudo yum -y install net-tools wget vim ntp
4）分別在三臺主機上設置主機名
[lxw@localhost /]$ sudo hostnamectl --static set-hostname k8s_master
[sudo] lxw 的密碼：
[lxw@localhost /]$ uname -a
Linux k8s_master 3.10.0-693.el7.x86_64 #1 SMP Tue Aug 22 21:09:27 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
[lxw@localhost root]$ sudo hostnamectl --static set-hostname k8s_node1
[lxw@localhost root]$ uname -a
Linux k8s_node1 3.10.0-693.el7.x86_64 #1 SMP Tue Aug 22 21:09:27 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
[lxw@localhost root]$
[lxw@localhost root]$ sudo hostnamectl --static set-hostname k8s_node2
[lxw@localhost root]$ uname -a
Linux k8s_node2 3.10.0-693.el7.x86_64 #1 SMP Tue Aug 22 21:09:27 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
[lxw@localhost root]$
5）設置hosts
[root@k8s_master ~]# cat <<EOF > /etc/hosts
> 192.168.32.100 k8s_master
> 192.168.32.110 k8s_node1
> 192.168.32.120 k8s_node2
> EOF
2、各個節點安裝docker
注：可以不安裝，安裝k8s的時候會安裝
1）更新源
2）卸載舊版本
#移除舊版本
sudo yum remove docker \
docker-client \
docker-client-latest \
docker-common \
docker-latest \
docker-latest-logrotate \
docker-logrotate \
docker-selinux \
docker-engine-selinux \
docker-engine
# 刪除所有舊的數據
sudo rm -rf /var/lib/docker
3）安裝需要的軟件包
# 安裝依賴包
sudo yum install -y yum-utils \
device-mapper-persistent-data \
lvm2
4）設置yum源
#刪掉舊源
sudo rm -rf /etc/yum.repo.d/docker-ce.repo
# 添加源，使用了阿里雲鏡像
sudo yum-config-manager \
--add-repo \
http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
5）安裝
# 配置緩存
sudo yum makecache fast
# 安裝最新穩定版本的docker
sudo yum install -y docker-ce
6）啓動並加入開機啓動
# 啓動docker引擎並設置開機啓動
sudo systemctl start docker
sudo systemctl enable docker
7）測試
[lxw@localhost yum.repos.d]$ sudo docker search centos
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
centos The official build of CentOS. 5917 [OK]
ansible/centos7-ansible Ansible on Centos7 128 [OK]
jdeathe/centos-ssh OpenSSH / Supervisor / EPEL/IUS/SCL
8）創建docker組
[lxw@localhost yum.repos.d]$ sudo groupadd docker
[sudo] lxw 的密碼：
groupadd：“docker”組已存在
[lxw@localhost yum.repos.d]$ sudo usermod -aG docker lxw
[lxw@localhost yum.repos.d]$ docker run hello-world
參考鏈接：https://www.jianshu.com/p/e6b946c79542
3、master節點配置
etcd安裝
1）安裝etcd
[lxw@k8s_master root]$ sudo yum -y install etcd
2）編輯配置文件
[root@k8s_master ~]# cat /etc/etcd/etcd.conf | grep -v "^#"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379,http://0.0.0.0:4001"
ETCD_NAME="master"
ETCD_ADVERTISE_CLIENT_URLS="http://k8s_master:2379,http://k8s_master:4001"
3）開啓etcd
[root@k8s_master ~]# systemctl enable etcd
Created symlink from /etc/systemd/system/multi-user.target.wants/etcd.service to /usr/lib/systemd/system/etcd.service.
[root@k8s_master ~]# systemctl start etcd
4）驗證etcd
[root@k8s_master ~]# etcdctl -C http://k8s_master:4001 cluster-health
member 8e9e05c52164694d is healthy: got healthy result from http://k8s_master:2379
cluster is healthy
[root@k8s_master ~]#
kubernetes安裝
1）安裝kubernetes
[root@k8s_master ~]# yum -y install kubernetes
已加載插件：fastestmirror
Loading mirror speeds from cached hostfile
* base: mirrors.nju.edu.cn
2)修改apiserver服務配置文件:(master節點)
[root@k8s_master ~]# cat /etc/kubernetes/apiserver | grep -v "^#"
KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"
KUBE_API_PORT="--port=8080"
KUBE_ETCD_SERVERS="--etcd-servers=http://192.168.32.100:2379" #master實際ip
KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16"
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota"
KUBE_API_ARGS=""
[root@k8s_master ~]#
3）修改config配置文件:(master節點)
[root@k8s_master ~]# cat /etc/kubernetes/config | grep -v "^#"
KUBE_LOGTOSTDERR="--logtostderr=true"
KUBE_LOG_LEVEL="--v=0"
KUBE_ALLOW_PRIV="--allow-privileged=false"
KUBE_MASTER="--master=http://192.168.32.100:8080" #master的實際Ip
[root@k8s_master ~]#
4)設置開機啓動，開啓服務
[root@k8s_master ~]#systemctl enable kube-apiserver kube-controller-manager kube-scheduler
[root@k8s_master ~]#systemctl start kube-apiserver kube-controller-manager kube-scheduler
5）查看服務端口
[root@k8s_master ~]# netstat -tnlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address St ate PID/Program name
tcp 0 0 127.0.0.1:2380 0.0.0.0:* LI STEN 29976/etcd
tcp 0 0 0.0.0.0:22 0.0.0.0:* LI STEN 5758/sshd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LI STEN 5914/master
tcp6 0 0 :::6443 :::* LI STEN 30192/kube-apiserve
tcp6 0 0 :::10251 :::* LI STEN 30194/kube-schedule
tcp6 0 0 :::2379 :::* LI STEN 29976/etcd
tcp6 0 0 :::10252 :::* LI STEN 30193/kube-controll
tcp6 0 0 :::8080 :::* LI STEN 30192/kube-apiserve
tcp6 0 0 :::22 :::* LI STEN 5758/sshd
tcp6 0 0 ::1:25 :::* LI STEN 5914/master
tcp6 0 0 :::4001 :::* LI STEN 29976/etcd
[root@k8s_master ~]#
4、node節點配置
1)安裝kubernetes
[root@k8s_node2 ~]# yum -y install kubernetes
2)更改配置
[root@k8s_node1 ~]# cat /etc/kubernetes/config | grep -v "^#"
KUBE_LOGTOSTDERR="--logtostderr=true"
KUBE_LOG_LEVEL="--v=0"
KUBE_ALLOW_PRIV="--allow-privileged=false"
KUBE_MASTER="--master=http://192.168.32.100:8080"
[root@k8s_node1 ~]#
[root@k8s_master ~]# cat /etc/kubernetes/kubelet | grep -v "^#"
KUBELET_ADDRESS="--address=0.0.0.0"
KUBELET_HOSTNAME="--hostname-override=192.168.32.110" #node的ip
KUBELET_API_SERVER="--api-servers=http://192.168.32.100:8080" #master的Ip
KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"
KUBELET_ARGS=""
[root@k8s_master ~]#
3)設置開機啓動
[root@k8s_node1 ~]# systemctl enable kubelet kube-proxy
[root@k8s_node1 ~]# systemctl start kubelet kube-proxy
4)查看端口
[root@k8s_node1 ~]# netstat -ntlp
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 6022/sshd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 6181/master
tcp 0 0 127.0.0.1:10248 0.0.0.0:* LISTEN 38432/kubelet
tcp 0 0 127.0.0.1:10249 0.0.0.0:* LISTEN 38433/kube-proxy
tcp6 0 0 :::10255 :::* LISTEN 38432/kubelet
tcp6 0 0 :::22 :::* LISTEN 6022/sshd
tcp6 0 0 ::1:25 :::* LISTEN 6181/master
tcp6 0 0 :::4194 :::* LISTEN 38432/kubelet
tcp6 0 0 :::10250 :::* LISTEN 38432/kubelet
5）測試
[root@k8s_master ~]# kubectl get nodes
NAME STATUS AGE
192.168.32.110 Ready 11m
如果獲取不到資源，參考https://blog.csdn.net/weixin_37480442/article/details/82111564
5、配置網絡
1）安裝flannel
[root@k8s_master ~]# yum -y install flannel
2）flannelpeiz配置
[root@k8s_master ~]# cat /etc/sysconfig/flanneld | grep -v "^#"
FLANNEL_ETCD_ENDPOINTS="http://192.168.32.100:2379"
FLANNEL_ETCD_PREFIX="/atomic.io/network"
[root@k8s_master ~]#
3）配置網絡
[root@k8s_node1 ~]# etcdctl mk /atomic.io/network/config '{"Network":"172.17.0.0/16"}'
{"Network":"172.17.0.0/16"}
4）開機啓動項
[root@k8s_master ~]# systemctl enable flanneld
Created symlink from /etc/systemd/system/multi-user.target.wants/flanneld.service to /usr/lib/systemd/system/flanneld.service.
Created symlink from /etc/systemd/system/docker.service.wants/flanneld.service to /usr/lib/systemd/system/flanneld.service.
[root@k8s_master ~]# systemctl start flanneld
6、重啓服務
#master
for
SERVICES in docker kube-apiserver kube-controller-manager kube-scheduler;
do systemctl restart $SERVICES ;
done
#node
for
SERVICES in kube-proxy kubelet docker flanneld;
do systemctl restart $SERVICES;
systemctl enable $SERVICES;
systemctl status $SERVICES;
done
參考：https://blog.csdn.net/qq_38252499/article/details/99214276
https://www.jianshu.com/p/345e3fb797db