1、环境准备
目前只是使用了2台机器；centos7
（1）k8s-matser :192.168.2.178
（2）k8s-node :192.168.2.207
2、设置节点
（1）设置k8s-master节点
hostnamectl --static set-hostname k8s-master
（2）设置/etc/hosts文件
vim /etc/hosts 添加下面信息：
192.168.2.178 k8s-master
192.168.2.178 etcd
192.168.2.178 registry
192.168.2.207 k8s-node
（3）关闭防护墙
systemctl disable firewalld.service
systemctl stop firewalld.service
3、安装etcd
安装命令：yum install etcd -y
编辑etcd的默认配置文件/etc/etcd/etcd.conf 如下：
# [member]
ETCD_NAME=master
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
#ETCD_WAL_DIR=""
#ETCD_SNAPSHOT_COUNT="10000"
#ETCD_HEARTBEAT_INTERVAL="100"
#ETCD_ELECTION_TIMEOUT="1000"
#ETCD_LISTEN_PEER_URLS="http://localhost:2380"
ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379,http://0.0.0.0:4001"
#ETCD_MAX_SNAPSHOTS="5"
#ETCD_MAX_WALS="5"
#ETCD_CORS=""
#
#[cluster]
#ETCD_INITIAL_ADVERTISE_PEER_URLS="http://localhost:2380"
# if you use different ETCD_NAME (e.g. test), set ETCD_INITIAL_CLUSTER value for this name, i.e. "test=http://..."
#ETCD_INITIAL_CLUSTER="default=http://localhost:2380"
#ETCD_INITIAL_CLUSTER_STATE="new"
#ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_ADVERTISE_CLIENT_URLS="http://etcd:2379,http://etcd:4001"
#ETCD_DISCOVERY=""
#ETCD_DISCOVERY_SRV=""
#ETCD_DISCOVERY_FALLBACK="proxy"
#ETCD_DISCOVERY_PROXY=""
#ETCD_STRICT_RECONFIG_CHECK="false"
#ETCD_AUTO_COMPACTION_RETENTION="0"
#ETCD_ENABLE_V2="true"
#
#[proxy]
#ETCD_PROXY="off"
#ETCD_PROXY_FAILURE_WAIT="5000"
#ETCD_PROXY_REFRESH_INTERVAL="30000"
#ETCD_PROXY_DIAL_TIMEOUT="1000"
#ETCD_PROXY_WRITE_TIMEOUT="5000"
#ETCD_PROXY_READ_TIMEOUT="0"
#
#[security]
#ETCD_CERT_FILE=""
#ETCD_KEY_FILE=""
#ETCD_CLIENT_CERT_AUTH="false"
#ETCD_TRUSTED_CA_FILE=""
#ETCD_AUTO_TLS="false"
#ETCD_PEER_CERT_FILE=""
#ETCD_PEER_KEY_FILE=""
#ETCD_PEER_CLIENT_CERT_AUTH="false"
#ETCD_PEER_TRUSTED_CA_FILE=""
#ETCD_PEER_AUTO_TLS="false"
#
#[logging]
#ETCD_DEBUG="false"
# examples for -log-package-levels etcdserver=WARNING,security=DEBUG
#ETCD_LOG_PACKAGE_LEVELS=""
#
#[profiling]
#ETCD_ENABLE_PPROF="false"
#ETCD_METRICS="basic"
#
#[auth]
#ETCD_AUTH_TOKEN="simple"
4、启动etcd并且验证
（1）systemctl start etcd // 启动etcd服务
（2）获取etcd的健康指标：
>$ etcdctl -C http://etcd:2379 cluster-health
>$ member 8e9e05c52164694d is healthy: got healthy result from http://etcd:2379
cluster is healthy
>$ etcdctl -C http://etcd:4001 cluster-health
>$ member 8e9e05c52164694d is healthy: got healthy result from http://etcd:2379
cluster is healthy
5、flannel安装
（1）安装命令：yum install flannel
（2）配置flannel：/etc/sysconfig/flanneld 如下：
# Flanneld configuration options
# etcd url location. Point this to the server where etcd runs
FLANNEL_ETCD_ENDPOINTS="http://etcd:2379"
# etcd config key. This is the configuration key that flannel queries
# For address range assignment
FLANNEL_ETCD_PREFIX="/atomic.io/network"
# Any additional options that you want to pass
#FLANNEL_OPTIONS=""
（3）配置etcd中关与flannel的key
etcdctl mk /atomic.io/network/config '{"Network":"192.0.0.0/16"}'
查看是否已经设置成功命令：
>$ etcdctl get /atomic.io/network/config
>$ { "Network": "192.0.0.0/16" }
其他相关命令如下：
>$ etcdctl rm /atomic.io/network/config //删除命令
(4) 启动flannel并设置开机自启
>$ systemctl start flanneld.service
>$ systemctl enable flanneld.service
6、安装docker
（1）安装命令：yum install docker -y
（2）开启docker服务：service docker start
（3）设置docker开启自启动：chkconfig docker on
（4）验证docker是否安装成功
>$ docker version
Client:
Version: 1.13.1
API version: 1.26
Package version: docker-1.13.1-96.gitb2f74b2.el7.centos.x86_64
Go version: go1.10.3
Git commit: b2f74b2/1.13.1
Built: Wed May 1 14:55:20 2019
OS/Arch: linux/amd64
Server:
Version: 1.13.1
API version: 1.26 (minimum version 1.12)
Package version: docker-1.13.1-96.gitb2f74b2.el7.centos.x86_64
Go version: go1.10.3
Git commit: b2f74b2/1.13.1
Built: Wed May 1 14:55:20 2019
OS/Arch: linux/amd64
Experimental: false
7、kubernets安装
k8s需要配置的东西比较多，正如第一节“环境介绍”中提及的，毕竟master上需要运行以下组件，kube-apiserver、kube-scheduler、kube-controller-manager
（1）配置/etc/kubernetes/apiserver文件
###
# kubernetes system config
#
# The following values are used to configure the kube-apiserver
#
# The address on the local server to listen to.
KUBE_API_ADDRESS="--address=0.0.0.0"
# The port on the local server to listen on.
KUBE_API_PORT="--port=8080"
# Port minions listen on
KUBELET_PORT="--kubelet-port=10250"
# Comma separated list of nodes in the etcd cluster
KUBE_ETCD_SERVERS="--etcd-servers=http://etcd:2379"
# Address range to use for services
KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16"
# default admission control policies
# KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota"
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ResourceQuota"
# Add your own!
KUBE_API_ARGS=""
（2）配置/etc/kubernetes/config文件
###
# kubernetes system config
#
# The following values are used to configure various aspects of all
# kubernetes services, including
#
# kube-apiserver.service
# kube-controller-manager.service
# kube-scheduler.service
# kubelet.service
# kube-proxy.service
# logging to stderr means we get it in the systemd journal
KUBE_LOGTOSTDERR="--logtostderr=true"
# journal message level, 0 is debug
KUBE_LOG_LEVEL="--v=0"
# Should this cluster be allowed to run privileged docker containers
KUBE_ALLOW_PRIV="--allow-privileged=false"
# How the controller-manager, scheduler, and proxy find the apiserver
KUBE_MASTER="--master=http://k8s-master:8080"
（3）启动k8s组件
>$ systemctl start kube-apiserver.service
>$ systemctl start kube-controller-manager.service
>$ systemctl start kube-scheduler.service
(4)查看是否已经启动
>$ ps -ef| grep kube
kube 11651 1 1 7月25 ? 00:13:25 /usr/bin/kube-apiserver --logtostderr=true --v=0 --etcd-servers=http://etcd:2379 --insecure-bind-address=0.0.0.0 --port=8080 --kubelet-port=10250 --allow-privileged=false --service-cluster-ip-range=192.168.0.0/16 --admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota
kube 11670 1 4 7月25 ? 00:54:23 /usr/bin/kube-controller-manager --logtostderr=true --v=0 --master=http://k8s-master:8080
kube 11689 1 0 7月25 ? 00:04:52 /usr/bin/kube-scheduler --logtostderr=true --v=0 --master=http://k8s-master:8080
root 27939 10894 0 14:27 pts/0 00:00:00 grep --color=auto kube
这里证明已经跑起来
在另外一台机器上设置k8s-node节点
1、环境准备
目前只是使用了2台机器；centos7
（1）k8s-matser :192.168.2.178
（2）k8s-node :192.168.2.207
2、设置节点
（1）设置k8s-node节点
hostnamectl --static set-hostname k8s-node
（2）设置/etc/hosts文件
vim /etc/hosts 添加下面信息：
192.168.2.178 k8s-master
192.168.2.178 etcd
192.168.2.178 registry
192.168.2.207 k8s-node
（3）关闭防护墙
systemctl disable firewalld.service
systemctl stop firewalld.service
3、flannel安装
（1）安装命令：yum install flannel
（2）配置flannel：/etc/sysconfig/flanneld
# Flanneld configuration options
# etcd url location. Point this to the server where etcd runs
FLANNEL_ETCD_ENDPOINTS="http://etcd:2379"
# etcd config key. This is the configuration key that flannel queries
# For address range assignment
FLANNEL_ETCD_PREFIX="/atomic.io/network"
# Any additional options that you want to pass
#FLANNEL_OPTIONS=""
（3）启动flannel并设置开机自启
>$ systemctl start flanneld.service
>$ systemctl enable flanneld.service
(4) docker安装
（1）安装命令：yum install docker -y
（2）开启docker服务：service docker start
（3）设置docker开启自启动：chkconfig docker on
（4）验证docker是否安装成功
>$ docker version
Client:
Version: 1.13.1
API version: 1.26
Package version: docker-1.13.1-96.gitb2f74b2.el7.centos.x86_64
Go version: go1.10.3
Git commit: b2f74b2/1.13.1
Built: Wed May 1 14:55:20 2019
OS/Arch: linux/amd64
Server:
Version: 1.13.1
API version: 1.26 (minimum version 1.12)
Package version: docker-1.13.1-96.gitb2f74b2.el7.centos.x86_64
Go version: go1.10.3
Git commit: b2f74b2/1.13.1
Built: Wed May 1 14:55:20 2019
OS/Arch: linux/amd64
Experimental: false
(5)kubernetes安装
（1）安装命令：yum install kubernetes
（2）不同于master节点，node节点上需要运行kubernetes的如下组件：kubelet、kubernets-proxy
（3）配置/etc/kubernetes/config
###
# kubernetes system config
#
# The following values are used to configure various aspects of all
# kubernetes services, including
#
# kube-apiserver.service
# kube-controller-manager.service
# kube-scheduler.service
# kubelet.service
# kube-proxy.service
# logging to stderr means we get it in the systemd journal
KUBE_LOGTOSTDERR="--logtostderr=true"
# journal message level, 0 is debug
KUBE_LOG_LEVEL="--v=0"
# Should this cluster be allowed to run privileged docker containers
KUBE_ALLOW_PRIV="--allow-privileged=false"
# How the controller-manager, scheduler, and proxy find the apiserver
KUBE_MASTER="--master=http://k8s-master:8080"
（4）配置/etc/kubernetes/kubelet
###
# kubernetes kubelet (minion) config
# The address for the info server to serve on (set to 0.0.0.0 or "" for all interfaces)
KUBELET_ADDRESS="--address=0.0.0.0"
# The port for the info server to serve on
# KUBELET_PORT="--port=10250"
# You may leave this blank to use the actual hostname
KUBELET_HOSTNAME="--hostname-override=k8s-node-1"
# location of the api-server
KUBELET_API_SERVER="--api-servers=http://k8s-master:8080"
# pod infrastructure container
KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"
# Add your own!
KUBELET_ARGS=""
（5）启动kube服务
>$ systemctl start kubelet.service
>$ systemctl start kube-proxy.service
>$ ps -ef|grep kube //验证kube服务是否已经开启
root 19728 1 1 7月25 ? 00:21:04 /usr/bin/kubelet --logtostderr=true --v=0 --api-servers=http://k8s-master:8080 --address=0.0.0.0 --hostname-override=k8s-node --allow-privileged=false --pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest
root 19814 1 1 7月25 ? 00:14:42 /usr/bin/kube-proxy --logtostderr=true --v=0 --master=http://k8s-master:8080
root 66824 19065 0 14:38 pts/0 00:00:00 grep --color=auto kube
(6) 验证集群状态
//在主节点k8s-master中输入
>$ kubectl get endpoints //查看端点信息
NAME ENDPOINTS AGE
kubernetes 192.168.2.178:6443 22h
>$ kubectl cluster-info //集群信息
Kubernetes master is running at http://localhost:8080
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
>$ kubectl get nodes //获取集群中的节点状态
NAME STATUS AGE
k8s-node Ready 21h
以上就是配置k8s集群全部过程，仅供参考
