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原文参考链接:https://blog.csdn.net/ljx1528/article/details/81436741
接着上一篇centos安装docker写:
介绍我现在的环境:
centos7.5 台式机三台
分配的环境
192.168.14.125 k8s-master
192.168.14.203 k8s-node1
192.168.14.154 k8s-node2
一、前提设置
- 关闭所有机器的防火墙(三台机器均要执行)
systemctl stop firewalld.service #停止
systemctl disable firewalld.service #禁用
firewall-cmd --state #查看状态
- 关闭selinux
打开config文件(三台机器均要执行)
vi /etc/selinux/config
然后修改enforcing为disabled
- 为各主机设置hostname
master 机器执行: sudo hostnamectl --static set-hostname k8s-master
node1 机器执行: sudo hostnamectl --static set-hostname k8s-node1
node2机器执行: sudo hostnamectl --static set-hostname k8s-node2
-修改hosts文件(三台机器均要执行)
打开文件
vi /etc/hosts
添加如下内容
192.168.14.125 k8s-master
192.168.14.125 etcd
192.168.14.125 registry
192.168.14.203 k8s-node1
192.168.14.154 k8s-node2
二、安装docker(三台机器均安装)
yum -y install docker #安装docker
chkconfig docker on #设置开机启动
service docker start #开启service
如果之前有安装过docker的话,可以先卸载重新执行以上命令
卸载命令如下
yum list installed | grep docker
然后根据上面的命令显示的结果执行删除命令
yum -y remove *** # 其中***表示yum list installed | grep docker显示的已经安装的docker 列表
在一次删除完docker已安装列表之后,执行
rm -rf /var/lib/docker # 删除容器,镜像等等
三、安装etcd
目前我把etcd部署在了k8s-master节点上,所以该部分在k8s-master上执行。
- 安装etcd
yum -y install etcd
- 修改etcd默认配置文件
打开文件
vim /etc/etcd/etcd.conf
修改文件
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"
ETCD_NAME="default"
ETCD_ADVERTISE_CLIENT_URLS="http://192.168.14.125:2379"
- 启动并验证etcd服务是否正常
依次执行以下四条命令
systemctl start etcd
systemctl enable etcd
etcdctl set testdir/testkey0 0
etcdctl -C http://etcd:2379 cluster-healt
四、部署k8s master (在k8s-master机器上执行)
- 安装k8s
yum -y install kubernetes
- 修改k8s配置文件
打开/etc/kubernetes/apiserver 文件
vim /etc/kubernetes/apiserver
修改内容
KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"
KUBE_API_PORT="--port=8080"
KUBE_ETCD_SERVERS="--etcd-servers=http://192.168.14.125:2379"
KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16" KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ResourceQuota"
KUBE_API_ARGS=""
打开文件/etc/kubernetes/config
vim /etc/kubernetes/config
修改内容
KUBE_LOGTOSTDERR="--logtostderr=true"
KUBE_LOG_LEVEL="--v=0"
KUBE_ALLOW_PRIV="--allow-privileged=false"
KUBE_MASTER="--master=http://k8s-master:8080"
- 启动服务&设置开机启动
依次执行以下命令
systemctl enable kube-apiserver.service
systemctl start kube-apiserver.service
systemctl enable kube-controller-manager.service
systemctl start kube-controller-manager.service
systemctl enable kube-scheduler.service
systemctl start kube-scheduler.service
五、部署k8s-node1 (单独在k8s-node1机器上执行)
- 安装k8s
yum -y install kubernetes
- 配置k8s
打开文件/etc/kubernetes/config
vim /etc/kubernetes/config
修改文件
KUBE_LOGTOSTDERR="--logtostderr=true"
KUBE_LOG_LEVEL="--v=0"
KUBE_ALLOW_PRIV="--allow-privileged=false"
KUBE_MASTER="--master=http://192.168.14.125:8080"
打开文件 /etc/kubernetes/kubelet
vim /etc/kubernetes/kubelet
修改文件
KUBELET_ADDRESS="--address=0.0.0.0"
KUBELET_HOSTNAME="--hostname-override=192.168.14.203"
KUBELET_API_SERVER="--api-servers=http://192.168.14.125:8080"
KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"
KUBELET_ARGS="--cluster-dns=192.168.14.125 --cluster-domain=cluster.local"
- 启动服务 & 设置开机启动
systemctl enable kubelet.service
systemctl start kubelet.service
systemctl enable kube-proxy.service
systemctl start kube-proxy.service
六、部署k8s-node2(单独在k8s-node2机器上执行)
- 安装k8s
yum -y install kubernetes
- 配置k8s
打开文件/etc/kubernetes/config
vim /etc/kubernetes/config
修改文件
KUBE_LOGTOSTDERR="--logtostderr=true"
KUBE_LOG_LEVEL="--v=0"
KUBE_ALLOW_PRIV="--allow-privileged=false"
KUBE_MASTER="--master=http://192.168.14.125:8080"
打开文件 /etc/kubernetes/kubelet
vim /etc/kubernetes/kubelet
修改文件
KUBELET_ADDRESS="--address=0.0.0.0"
KUBELET_HOSTNAME="--hostname-override=192.168.14.153"
KUBELET_API_SERVER="--api-servers=http://192.168.14.125:8080"
KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"
KUBELET_ARGS="--cluster-dns=192.168.14.125 --cluster-domain=cluster.local"
- 启动服务 & 设置开机启动
systemctl enable kubelet.service
systemctl start kubelet.service
systemctl enable kube-proxy.service
systemctl start kube-proxy.service
- 查看节点是否安装工正常(在k8s-master机器上执行)
执行命令
kubectl get nodes
显示的结果为以下类似情况则表明安装正常
七、创建覆盖网络 Flannel
- 安装flannel(三台机器上均执行)
yum -y install flannel
- 配置flannel (三台机器上均执行)
打开文件 /etc/sysconfig/flanneld
vim /etc/sysconfig/flanneld
配置文件
k8s-master中的flanneld文件配置如下
FLANNEL_ETCD_ENDPOINTS="http://192.168.14.125:2379"
FLANNEL_ETCD_PREFIX="/k8s/network"
k8s-node1中的flanneld文件配置如下
FLANNEL_ETCD_ENDPOINTS="http://192.168.14.125:2379"
FLANNEL_ETCD_PREFIX="/k8s/network"
k8s-node2中的flanneld文件配置如下
FLANNEL_ETCD_ENDPOINTS="http://192.168.14.125:2379"
FLANNEL_ETCD_PREFIX="/k8s/network"
- 配置etcd中关于flannel的key(单独在k8s-master中执行)
执行命令
etcdctl set /k8s/network/config '{"Network": "172.20.0.0/16"}'
检查配置
etcdctl get /k8s/network/config
- 启动Flannel
1、在k8s-master上执行
systemctl enable flanneld.service
systemctl start flanneld.service
service docker restart
systemctl restart kube-apiserver.service
systemctl restart kube-controller-manager.service
systemctl restart kube-scheduler.service
2、在k8s-node1上执行
systemctl enable flanneld.service
systemctl start flanneld.service
service docker restart
systemctl restart kubelet.service
systemctl restart kube-proxy.service
3、在k8s-node2上执行
systemctl enable flanneld.service
systemctl start flanneld.service
service docker restart
systemctl restart kubelet.service
systemctl restart kube-proxy.service