Centos7 Install Kubernetes
环境搭建
配置官方 k8s yum 源:
cat <<EOF > /etc/yum.repos.d/virt7-docker-common-release.repo
[virt7-docker-common-release]
name=virt7-docker-common-release
baseurl=http://cbs.centos.org/repos/virt7-docker-common-release/x86_64/os/
gpgcheck=
EOF
virt7-docker-common-release.repo
配置阿里云 yum 源:
vim /etc/yum.repos.d/aliyun-docker-common-release.repo
[base]
name=CentOS-$releasever - Base - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/os/$basearch/
http://mirrors.aliyuncs.com/centos/$releasever/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
gpgcheck=
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#released updates
[updates]
name=CentOS-$releasever - Updates - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/updates/$basearch/ http://mirrors.aliyuncs.com/centos/$releasever/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
gpgcheck=
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/extras/$basearch/
http://mirrors.aliyuncs.com/centos/$releasever/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
gpgcheck=
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/centosplus/$basearch/ http://mirrors.aliyuncs.com/centos/$releasever/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=
enabled=
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
#contrib - packages by Centos Users
[contrib]
name=CentOS-$releasever - Contrib - mirrors.aliyun.com
failovermethod=priority
baseurl=http://mirrors.aliyun.com/centos/$releasever/contrib/$basearch/
http://mirrors.aliyuncs.com/centos/$releasever/contrib/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=contrib
gpgcheck=
enabled=
gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7
aliyun-docker-common-release.repo
更新本地镜像源
yum clean all
yum makecache
关闭 SELinux：
setenforce 0
关闭防火墙:
systemctl stop firewalld.service
systemctl disable firewalld.service
安装 Kubernetes 环境 (Master)
yum -y install --enablerepo=virt7-docker-common-release kubernetes etcd flannel
编辑本地 host 文件，做好访问映射：vim /etc/hosts
配置文件修改：
vim /etc/kubernetes/config
KUBE_LOGTOSTDERR="--logtostderr=true"
KUBE_LOG_LEVEL="--v=0"
KUBE_ALLOW_PRIV="--allow-privileged=false"
KUBE_MASTER="--master=http://k8s-master:8080"
config
vim /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://0.0.0.0:2379"
etcd.conf
vim /etc/kubernetes/apiserver
需删除KUBE_ADMISSION_CONTROL项ServiceAccount参数
KUBE_API_ADDRESS="--insecure-bind-address=0.0.0.0"
KUBE_API_PORT="--port=8080"
KUBELET_PORT="--kubelet-port=10250"
KUBE_ETCD_SERVERS="--etcd-servers=http://k8s-master:2379"
KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16"
KUBE_ADMISSION_CONTROL="--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ResourceQuota"
KUBE_API_ARGS=""
apiserver
启动etcd
systemctl start etcd
systemctl enable etcd
创建网络
etcdctl mkdir /kube-centos/network
etcdctl mk /kube-centos/network/config "{\"Network\":\"172.30.0.0/16\",\"SubnetLen\":24,\"Backend\":{\"Type\":\"vxlan\"}}"
vim /etc/sysconfig/flanneld
FLANNEL_ETCD_ENDPOINTS="http://k8s-master:2379"
FLANNEL_ETCD_PREFIX="/kube-centos/network"
flanneld
服务启动：
for SERVICES in etcd kube-apiserver kube-controller-manager kube-scheduler flanneld; do systemctl restart $SERVICES; systemctl enable $SERVICES; systemctl status $SERVICES; done
安装 Kubernetes 环境 (Minion/Node):
hosts配置
vim /etc/hosts 同Master配置
yum -y install --enablerepo=virt7-docker-common-release kubernetes flannel
vi /etc/kubernetes/config
KUBE_LOGTOSTDERR="--logtostderr=true"
KUBE_LOG_LEVEL="--v=0"
KUBE_ALLOW_PRIV="--allow-privileged=false"
KUBE_MASTER="--master=http://k8s-master:8080"
config
vi /etc/kubernetes/kubelet
KUBELET_ADDRESS="--address=0.0.0.0"
KUBELET_PORT="--port=10250"
KUBELET_HOSTNAME="--hostname-override=k8s-node-1"
KUBELET_API_SERVER="--api-servers=http://k8s-master:8080"
KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest"
KUBELET_ARGS=""
kubelet
vi /etc/sysconfig/flanneld
FLANNEL_ETCD_ENDPOINTS="http://k8s-master:2379"
FLANNEL_ETCD_PREFIX="/kube-centos/network"
flanneld
服务启动：
for SERVICES in kube-proxy kubelet flanneld docker; do systemctl restart $SERVICES; systemctl enable $SERVICES; systemctl status $SERVICES; done
配置参数：
kubectl config set-cluster default-cluster --server=http://k8s-master:8080
kubectl config set-context default-context --cluster=default-cluster --user=default-admin
kubectl config use-context default-context
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