kubernetes集群搭建（4）：node节点安装

下列所有操作需要在所有node节点上操作，并注意红色部分的修改

1.node节点不需要安装etcd来存储相关信息

yum -y install flannel kubernetes

2.修改flanneld网络相关信息 

[root@k8s-node1 ~]# vi  /etc/sysconfig/flanneld 

# Flanneld configuration options
FLANNEL_ETCD="http://k8s-master:2379"
# etcd url location.  Point this to the server where etcd runs
FLANNEL_ETCD_ENDPOINTS="http://k8s-master: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=""

注意： /atomic.io/network 需与  master配置第7步中配置 etcdctl mk /atomic.io/network/config '{"Network":"172.16.0.0/16"}' 名称一致

3.kubelet config信息

[root@k8s-node1 ~]# vi /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.kubelet 核心文件修改

[root@k8s-node1 ~]# vi /etc/kubernetes/kubelet 

# 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-node1"

# 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=192.168.100.6:5000/rhel7/pod-infrastructure:1.0"

KUBELET_ARGS="--cluster-dns=10.254.0.2 --cluster-domain=cluster.local"

注意：修改 KUBELET_HOSTNAME 中节点信息，KUBELET_POD_INFRA_CONTAINER 对应到私库地址 ， KUBELET_ARGS 配置的为dns解析信息 和master配置第4步 配置一致

5.启动服务

for SERVICES in kube-proxy kubelet flanneld; do
    systemctl restart $SERVICES
    systemctl enable $SERVICES
    systemctl status $SERVICES 
done

6.在master节点上测试配置是否成功。如果看到红色信息，表示环境搭建成功

[root@k8s-master ~]# kubectl get nodes
NAME        STATUS    AGE
k8s-node1   Ready     11d
k8s-node2   Ready     11d
[root@k8s-master ~]#