Setup kubernetes

1. install CentOS 7
2. config OS

       systemctl disable firewalld.service
       systemctl stop firewalld.service
   
       # vi /etc/selinux/config
       SELINUX=disabled
       

3. install softwares

       yum install kubernetes etcd flannel docker
       

4. config etcd

       # vim /etc/etcd/etcd.conf
       ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
       ETCD_LISTEN_PEER_URLS="http://0.0.0.0:2380"
       ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"
       ETCD_NAME="lpdmaster01"
       ETCD_INITIAL_ADVERTISE_PEER_URLS="http://lpdmaster01:2380"
       ETCD_ADVERTISE_CLIENT_URLS="http://lpdmaster01:2379"
       ETCD_INITIAL_CLUSTER="lpdmaster01=http://lpdmaster01:2380,lpdmaster02=http://lpdmaster02:2380,lpdmaster03=http://lpdmaster03:2380"
       ETCD_INITIAL_CLUSTER_TOKEN="123456"
       ETCD_INITIAL_CLUSTER_STATE="new"
   
       # check if working
       etcdctl cluster-health
       etcdctl member list
       

5. config flannel

       etcdctl set /atomic.io/network/config '{ "Network": "192.168.0.0/16" }'
   
       # vim /etc/sysconfig/flanneld
       FLANNEL_ETCD_ENDPOINTS="http://lpdmaster01:2379,http://lpdmaster02:2379,http://lpdmaster03:2379"
       FLANNEL_ETCD_PREFIX="/atomic.io/network"
       FLANNEL_OPTIONS="-iface eth0"
       

6. config kubernetes-master

       # vim /etc/kubernetes/config
       KUBE_LOGTOSTDERR="--logtostderr=true"
       KUBE_LOG_LEVEL="--v=0"
       KUBE_ALLOW_PRIV="--allow-privileged=false"
       KUBE_MASTER="--master=http://127.0.0.1:8080"
   
       # vim /etc/kubernetes/apiserver
       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://lpdmaster01:2379,http://lpdmaster02:2379,http://lpdmaster03:2379"
       KUBE_SERVICE_ADDRESSES="--service-cluster-ip-range=10.254.0.0/16"
       KUBE_ADMISSION_CONTROL=""
       KUBE_API_ARGS=""
   
       # vim /etc/kubernetes/controller-manager
       KUBE_CONTROLLER_MANAGER_ARGS=""
   
       # vim /etc/kubernetes/scheduler
       KUBE_SCHEDULER_ARGS=""
       

7. config kubernetes-node

       # vim /etc/kubernetes/config
       KUBE_LOGTOSTDERR="--logtostderr=true"
       KUBE_LOG_LEVEL="--v=0"
       KUBE_ALLOW_PRIV="--allow-privileged=false"
       KUBE_MASTER="--master=http://kuberneteslbs:8080"
   
       # vim /etc/kubernetes/kubelet
       KUBELET_ADDRESS="--address=0.0.0.0"
       KUBELET_PORT="--port=10250"
       KUBELET_HOSTNAME="--hostname-override=172.16.8.121" (local ip)
       KUBELET_API_SERVER="--api-servers=http://kuberneteslbs:8080"
       KUBELET_POD_INFRA_CONTAINER="--pod-infra-container-image=registry.access.redhat.com/rhel7/pod-infrastructure:latest" (after setup, better to pull this img manually)
       KUBELET_ARGS=""
   
       # vim /etc/kubernetes/proxy
       KUBE_PROXY_ARGS="--hostname-override 172.16.8.121 --cluster-cidr 192.168.0.0/16" (cluster-cidr is flannel config)
       

8. config iptables

       iptables -P FORWARD ACCEPT