centos 7 部署k8s集群

网中网

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

[iyunv@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

[iyunv@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

[iyunv@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

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

打通网络

[iyunv@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

[iyunv@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

[iyunv@192-168-0-154 ~]# rm -y /var/run/docker.pid
[iyunv@192-168-0-154 ~]# source /run/flannel/subnet.env
[iyunv@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

[iyunv@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

[iyunv@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

[iyunv@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

[iyunv@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