Deploying the Kubernetes cluster on CentOS7

Yum-y Install ETCD Docker flannel kubenetes

General will encounter no k8s source problem, first Yum update-y see if it is effective, if still useless to create a Yum source, and then install Kubenetes

Do the following:

Create a Yum source

vi  virt7-docker-common-release.repo

Add the following content:

[virt7-docker-common-release]name=virt7-docker-common-releasebaseurl=http://cbs.centos.org/repos/virt7-docker-common-release/x86_64/os/gpgcheck=0

Installation Services

Execute the following command to install the Kubernetes

-y install --enablerepo=virt7-docker-common-release kubernetes 

Next start Deployment:

disabling firewalls

systemctl disable iptables-services firewalldsystemctl stop iptables-services firewalld

启动 etcd docker  flannel 服务：
1、先启动etcd:
systemctl enable etcd.service
systemctl start etcd.service

2 Configuring Flannel

Edit/etc/sysconfig/flanneld on Master, node, modify red section

[Email protected] ~]# Vi/etc/sysconfig/flanneld

# Flanneld configuration options# etcd URL location.  Point the server where ETCD runsflannel_etcd_endpoints= "http://etcd:2379"# ETCD config key.  This is the configuration key, flannel queries# for address range assignmentflannel_etcd_prefix= "/atomic.io/network" # Any additional options, want to Pass#flannel_options= ""

3 Configuring the key for flannel in ETCD

Flannel is configured with ETCD to ensure configuration consistency across multiple flannel instances, so the following configuration is required on the ETCD: ('/atomic.io/network/config ' This key with the above/etc/sysconfig/ The configuration item in flannel Flannel_etcd_prefix is relative, the wrong start will be error)

[[email protected] ~]# etcdctl mk/atomic.io/network/config ' {"Network": "10.0.0.0/16"} ' {"Network": "10.0.0.0/16"}

4 start

After you start flannel, you need to restart Docker in turn

In master execution:

Systemctl enable Flanneld.service Systemctl start Flanneld.service service Docker restart

Execute on Node:

Systemctl enable Flanneld.service Systemctl start Flanneld.service service Docker restart

Configuring the Kubernetes service on the master node

1. Modify the file/etc/kubernetes/config (all nodes)

Note that both master and slave hosts have to be modified
Specify the IP of the master host, and the file contents are as follows:

$ cat /etc/kubernetes/configKUBE_LOGTOSTDERR="--logtostderr=true"KUBE_LOG_LEVEL="--v=0"KUBE_ALLOW_PRIV="--allow-privileged=false"KUBE_MASTER="--master=http://master:8080"

1. Modify the configuration file/etc/etcd/etcd.conf to ensure that the ETCD listens to all addresses. The contents are as follows:

$ cat /etc/etcd/etcd.confETCD_NAME=defaultETCD_DATA_DIR="/var/lib/etcd/default.etcd"ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"

2. Modify the configuration file/etc/kubernetes/apiserver

cat /etc/kubernetes/apiserverKUBE_API_ADDRESS="--address=0.0.0.0"KUBE_API_PORT="--port=8080"KUBELET_PORT="--kubelet-port=10250"KUBE_ETCD_SERVERS="--etcd-servers=http://127.0.0.1:2379"KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16"KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,ResourceQuota"KUBE_API_ARGS=""

3. Modify the configuration file/etc/kubernetes/controller-manager, define the slave host IP address

KUBELET_ADDRESSES="--machines=master地址"

On the master host, start the service

Execute the following command to start the service in bulk

in etcd kube-apiserver kube-controller-manager kube-scheduler; do systemctl restart $SERVICES systemctl enable $SERVICES systemctl status $SERVICESdone

Slave node Configuration

Note: The slave node host is also installed Docker,flannel, k8s

Yum installation Kubernetes

yum -y install flannel docker

-y install --enablerepo=virt7-docker-common-release kubernetes

1. Modify the Kubernetes configuration file to specify master.

$ cat /etc/kubernetes/configKUBE_MASTER="--master=http://master:8080"

2. Configure the Kubelet service.

$ cat /etc/kubernetes/kubeletKUBELET_ADDRESS="--address=0.0.0.0"KUBELET_PORT="--port=10250"KUBELET_HOSTNAME="--hostname-override=node自身"KUBELET_API_SERVER="--api-servers=http://master:8080"

On the slave host, start the service

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

Verify

Login Master now to confirm the status of slave

$ kubectl get nodesNAME           LABELS                                STATUS    AGE10.16.93.182   kubernetes.io/hostname=node1 Ready 1h

这样就配置完成了

Deploying the Kubernetes cluster on CentOS7