centos7 yum安装kubernetes 1.1

121thre

前提：centos7 已经update
yum update -y

一、创建yum源 master，slave都要
kubernetes release 版本 yum源
http://cbs.centos.org/repos/virt ... x86_64/os/Packages/

vi  virt7-docker-common-release.repo

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

二、yum 安装服务
yum -y install --enablerepo=virt7-docker-common-release kubernetes etcd

三、将主机名添加到master,slave的/etc/hosts里，如果主机名有dns解析就不需要添加

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echo "192.168.5.221 k8s_master 192.168.5.222 k8s_slave1 192.168.5.237 k8s_slave2" >> /etc/hosts

四、修改/etc/kubernetes/config(所有节点)

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# 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://192.168.5.221:8080"

五、禁用防火墙

1 2	systemctl disable iptables-services firewalld systemctl stop iptables-services firewalld

六、在master节点配置kubernetes服务
修改配置文件/etc/etcd/etcd.conf,确保etcd监听所有地址，修改如下：

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ETCD_NAME=default ETCD_DATA_DIR="/var/lib/etcd/default.etcd" ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"

修改配置文件/etc/kubernetes/apiserver,修改如下：

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### # 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://127.0.0.1:2379" # 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,ResourceQuota" # Add your own! KUBE_API_ARGS=""

修改配置文件/etc/kubernetes/controller-manager，定义minions ip地址

1	KUBELET_ADDRESSES="--machines=192.168.5.222,192.168.5.223"

启动服务

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

注意：1.1开始会自动加入证书认证，程序会自动生成证书文件，需要检查目录的属主属组

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[iyunv@k8s_master kubernetes]# pwd /var/run/kubernetes [iyunv@k8s_master kubernetes]# ll -rw-r--r-- 1 kube kube 1200 Nov 20 15:16 apiserver.crt -rw------- 1 kube kube 1679 Nov 20 15:16 apiserver.key

重启服务

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for SERVICES in etcd kube-apiserver kube-controller-manager kube-scheduler; do     systemctl restart $SERVICES     systemctl status $SERVICES done

minions 节点配置
#单独安装docker 1.7

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yum install docker-1.7.1* docker-selinux-1.7.1 systemctl enable docker-storage-setup.service systemctl enable docker.service

#yum 安装kubernetes flannel

1	yum -y install --enablerepo=virt7-docker-common-release kubernetes flannel

#创建docker-pool

1	docker-storage-setup

#为etcd服务配置flannel，修改配置文件 /etc/sysconfig/flanneld

1	FLANNEL_ETCD="http://192.168.5.221:2379"

#修改kubernetes配置文件，指定master。/etc/kubernetes/config

1 2	# How the controller-manager, scheduler, and proxy find the apiserver KUBE_MASTER="--master=http://192.168.5.221:8080"

#配置kubelet服务。/etc/kubernetes/kubelet

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# 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=192.168.5.237" # location of the api-server KUBELET_API_SERVER="--api-servers=http://192.168.5.221:8080"

#启动服务

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

如果报错Bridge ip (...) does not match existing bridge configuration，是因为docker的bridge 先于flannel启动导致冲突
删除docker 0

1 2	ip link set dev docker0 down brctl delbr docker0

vi /usr/lib/systemd/system/docker.service 修改如下：

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[Unit] Description=Docker Application Container Engine Documentation=http://docs.docker.com After=flanneld.service Wants=docker-storage-setup.service Requires=flanneld.service systemctl restart docker

#验证
#在每个minions可以看到2块网卡：docker0和flannel0，这2块网卡的ip在不同的机器ip地址不同。但是同机器的2块网卡ip相同

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ip a | grep -E "flannel|docker"|grep inet     inet 172.17.58.0/16 scope global flannel0     inet 172.17.58.1/24 scope global docker0

#现在登陆master，确认minions的状态

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[iyunv@k8s_master etcd]#  kubectl get nodes NAME            LABELS                                 STATUS    AGE 192.168.5.222   kubernetes.io/hostname=192.168.5.222   Ready     1d 192.168.5.237   kubernetes.io/hostname=192.168.5.237   Ready     2d