ubuntu物理机上搭建Kubernetes集群 -- minion 配置

1. flannel配置

• 下载二进制文件 https://github.com/coreos/flannel/releases 版本：flannel-v0.7.0-linux-amd64.tar.gz
• flanneld, mk-docker-opts.sh拷贝到/usr/bin目录下（确保两个文件具有可执行的模式chmod 777 flanneld）
• 创建配置文件/lib/systemd/system/flanneld.service

  [Unit]
  Description=Flanneld overlay address etcd agent
  After=network.target
  After=network-online.target
  Wants=network-online.target
  After=etcd.service
  Before=docker.service
  
  [Service]
  Type=notify
  EnvironmentFile=-/etc/flannel/flannel.conf
  EnvironmentFile=-/etc/sysconfig/docker-network
  ExecStart=/usr/bin/flanneld -etcd-endpoints=${FLANNEL_ETCD} -etcd-prefix=${FLANNEL_ETCD_KEY} $FLANNEL_OPTIONS
  ExecStartPost=/usr/bin/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/docker
  Restart=on-failure
  
  [Install]
  WantedBy=multi-user.target
  RequiredBy=docker.service

• 创建配置文件/etc/flannel/flannel.conf

  #flanneld configuration options
  
  # etcd url location.  Point this to the server where etcd runs
  FLANNEL_ETCD="http://109.105.46.94:2379"
  
  # etcd config key.  This is the configuration key that flannel queries
  # For address range assignment
  FLANNEL_ETCD_KEY="/flannel/network"
  
  # Any additional options that you want to pass
  FLANNEL_OPTIONS=""

• 启动服务systemctl start flannel
• 查看是否成功 ip a

2.为了使docker使用flannel创建的子网，需要修改docker的启动文件

• flannel成功启动后，会自动在/run/flannel下创建docker和 subnet.env两个文件，将这两个文件加入到docker启动文件中
• 修改/lib/systemd/system/docker.service
• 
• 重启docker

systemctl daemon-reload

systemctl restart docker

3.将kubelet，kube-proxy拷贝到/user/bin目录下

• 创建kubelet配置文件 /lib/systemd/system/kubelet.service

[Unit]
Description=kubelet
Documentation=http://kubernetes.io/docs/

[Service]
ExecStart=/usr/bin/kubelet 
--address=0.0.0.0 
--hostname-override=109.105.46.95 
--api-servers=http://109.105.46.94:8080 
--log-dir=/home/nwlab/kubernets/logs/kubelet 
--v=0 
--allow-privileged=false

KillMode=process
Restart=on-failure
RestartSec=42s

[Install]
WantedBy=multi-user.target

• 创建kube-proxy配置文件 /lib/systemd/system/kube-proxy.service

[Unit]
Description=kube-proxy
Documentation=http://kubernetes.io/docs/

[Service]
ExecStart=/usr/bin/kube-proxy 
--v=0 
--logtostderr=true 
--hostname-override=109.105.46.95 
--log-dir=/home/nwlab/kubernets/logs/kubelet 
--bind-address=0.0.0.0 
--master=http://109.105.46.94:8080

KillMode=process
Restart=on-failure
RestartSec=42s

[Install]
WantedBy=multi-user.target

• 启动kubelet，kube-proxy 服务

systemctl daemon-reload
systemctl  restart kubelet.service
systemctl  restart kube-proxy.service

• 查看是否成功 在master上执行 kubectl get nodes