前期准备

systemctl stop firewalld

systemctl disable firewalld

yum -y install ntp

systemctl start ntpd

systemctl enable ntpd

yum update -y

 

安装etcd  Kubernetes 

yum -y install etcd kubernetes  flannel

 

配置etcd

[root@kubernetes-master ~]# egrep -v "^#|^$" /etc/etcd/etcd.conf

ETCD_NAME=default

ETCD_DATA_DIR="/var/lib/etcd/default.etcd"

ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"

ETCD_ADVERTISE_CLIENT_URLS="http://localhost:2379"

 

配置k8s api

[root@kubernetes-master ~]# egrep -v "^#|^$" /etc/kubernetes/apiserver

KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"

KUBE_ETCD_SERVERS="--etcd-servers=http://10.64.8.68:2379"

KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16"

KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,ResourceQuota"

KUBE_API_ARGS=""

 

配置flannel网络

[root@kubernetes-master ~]# egrep -v "^#|^$" /etc/sysconfig/flanneld

FLANNEL_ETCD_ENDPOINTS="http://10.64.8.68:2379"

FLANNEL_ETCD_PREFIX="/atomic.io/network"

 

启动etcd k8s服务

for SERVICES in etcd kube-apiserver kube-controller-manager kube-scheduler flanneld; do

systemctl restart $SERVICES

systemctl enable $SERVICES

systemctl status $SERVICES 

done

 

定义flannel network

[root@kubernetes-master ~]# etcdctl mk /atomic.io/network/config '{"Network":"172.17.0.0/16"}'

打通网络

[root@localhost data]# etcdctl  ls /atomic.io/network/subnets

/atomic.io/network/subnets/172.17.35.0-24

/atomic.io/network/subnets/172.17.42.0-24

/atomic.io/network/subnets/172.17.67.0-24

[root@localhost data]#  etcdctl get /atomic.io/network/subnets/172.17.35.0-24

{"PublicIP":"192.168.0.164"}

可以看到164 上面的网段为172.17.35.0/24

 每个机器上执行

[root@192-168-0-154 ~]# rm -y /var/run/docker.pid

[root@192-168-0-154 ~]# source /run/flannel/subnet.env

[root@192-168-0-154 ~]# ifconfig docker0 ${FLANNEL_SUBNET}

然后重启 docker

systemctl restart docker

这样容器之间网络就打通了

配置Kubernetes Minions (Nodes节点都执行一遍)

yum -y install flannel kubernetes

配置/etc/sysconfig/flanneld

[root@kubernetes-node2 ~]# egrep -v "^#|^$" /etc/sysconfig/flanneld

FLANNEL_ETCD_ENDPOINTS="http://10.64.8.68:2379"

FLANNEL_ETCD_PREFIX="/atomic.io/network"

FLANNEL_OPTIONS="" #这里可以指定哪个网卡-iface=ens192

 

配置k8s   /etc/kubernetes/config

[root@kubernetes-node2 ~]# egrep -v "^#|^$" /etc/kubernetes/config

KUBE_LOGTOSTDERR="--logtostderr=true"

KUBE_LOG_LEVEL="--v=0"

KUBE_ALLOW_PRIV="--allow-privileged=false"

KUBE_MASTER="--master=http://10.64.8.68:8080"

 

配置kubelet服务 /etc/kubernetes/kubelet 

[root@kubernetes-node2 ~]# egrep -v "^#|^$" /etc/kubernetes/kubelet 

KUBELET_ADDRESS="--address=0.0.0.0"

KUBELET_HOSTNAME="--hostname-override=10.64.8.70" #这个是节点自己的IP

KUBELET_API_SERVER="--api-servers=http://10.64.8.68:8080"

KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"

KUBELET_ARGS=""

 

 

启动服务

for SERVICES in kube-proxy kubelet docker flanneld; do

systemctl restart $SERVICES

systemctl enable $SERVICES

systemctl status $SERVICES 

done

 

查询相关节点

[root@kubernetes-master ~]# kubectl get nodes

NAME STATUS AGE

10.64.8.69 Ready 5d

10.64.8.70 Ready 5d

10.64.8.72 Ready 5d