【kubernetes】ubuntu14.04 64位 搭建kubernetes过程

背景：

Kubernetes介绍：http://kubernetes.io/docs/getting-started-guides/

github地址：https://github.com/kubernetes/kubernetes

在ubuntu上安装文档官方地址：http://kubernetes.io/docs/getting-started-guides/ubuntu/

环境：

• Master:
  • Ubunut14.04
  • 192.168.27.135(NAT) 　　　　　　　　
• Minion1:
  • Ubuntu14.04
  • 192.168.27.136(NAT) 
• Minion2:
  • Ubuntu14.04
  • 192.168.27.137(NAT) 

准备工作：

需要在三个节点上安装docker和ssh，安装ssh：

$ sudo apt-get install openssh-server
$ sudo service ssh start

安装docker:

sudo apt-get install docker-engine

安装Kubernetes：

1、在Master上，首先创建一个工作目录，执行：

$ git clone https://github.com/kubernetes/kubernetes.git

2、下载完后，进入kubernetes目录，修改kubernetes/cluster/ubuntu/config-default.sh文件：

root@192.168.127.135 root@192.168.27.136 root@192.168.27.137

3、安装kubernetes：

$ cd  kubernetes/cluster
$ KUBERNETES_PROVIDER=ubuntu ./kube-up.sh

成功安装的截图如下：

访问页面：

遇到的各种坑：

1、重启master节点，如何恢复？

这个问题弄了我至少3小时才搞定，因为我是准备直接重新执行一遍上面步骤的第三步，也就是再执行一次kube-up.sh，然而我发现每次该脚本都会从github上下载etcd、flanneld和kubernetes包，这个包有1.4G大小，可想而知要耽误多少时间。然后我就只能慢慢找这段脚本在哪执行的，最后发现在kubernetes/cluster/ubuntu/下的download-release.sh，也就是下图中的文件。所以我就把文件的内容改了，改成下面代码中的样子，目的是不让它每次都下。随后呢，我的做法是把第一次成功安装的文件备份一下，也就是把kubernetes/cluster/ubuntu/binaries这个目录备份起来，然后直接拷到重启后的master的对应目录。然后再执行kube-up.sh，之后就OK啦！

#!/bin/bash

# Copyright 2015 The Kubernetes Authors All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Download the etcd, flannel, and K8s binaries automatically and stored in binaries directory
# Run as root only

# author @resouer @WIZARD-CXY
set -e

#function cleanup {
  # cleanup work
  #rm -rf flannel* kubernetes* etcd* binaries
#}
#trap cleanup SIGHUP SIGINT SIGTERM

pushd $(dirname $0)
mkdir -p binaries/master
mkdir -p binaries/minion

# flannel
FLANNEL_VERSION=${FLANNEL_VERSION:-"0.5.5"}
echo "Prepare flannel ${FLANNEL_VERSION} release ..."
grep -q "^${FLANNEL_VERSION}$" binaries/.flannel 2>/dev/null || {
#  curl -L  https://github.com/coreos/flannel/releases/download/v${FLANNEL_VERSION}/flannel-${FLANNEL_VERSION}-linux-amd64.tar.gz -o flannel.tar.gz
#  tar xzf flannel.tar.gz
#  cp flannel-${FLANNEL_VERSION}/flanneld binaries/master
 # cp flannel-${FLANNEL_VERSION}/flanneld binaries/minion
  echo ${FLANNEL_VERSION} > binaries/.flannel
}

# ectd
ETCD_VERSION=${ETCD_VERSION:-"2.3.1"}
ETCD="etcd-v${ETCD_VERSION}-linux-amd64"
echo "Prepare etcd ${ETCD_VERSION} release ..."
grep -q "^${ETCD_VERSION}$" binaries/.etcd 2>/dev/null || {
#  curl -L https://github.com/coreos/etcd/releases/download/v${ETCD_VERSION}/${ETCD}.tar.gz -o etcd.tar.gz
#  tar xzf etcd.tar.gz
#  cp ${ETCD}/etcd ${ETCD}/etcdctl binaries/master
  echo ${ETCD_VERSION} > binaries/.etcd
}

function get_latest_version_number {
  local -r latest_url="https://storage.googleapis.com/kubernetes-release/release/stable.txt"
  if [[ $(which wget) ]]; then
    wget -qO- ${latest_url}
  elif [[ $(which curl) ]]; then
    curl -Ss ${latest_url}
  else
    echo "Couldn't find curl or wget.  Bailing out." >&2
    exit 4
  fi
}

KUBE_VERSION=$(get_latest_version_number | sed 's/^v//')

# k8s
echo "Prepare kubernetes ${KUBE_VERSION} release ..."
grep -q "^${KUBE_VERSION}$" binaries/.kubernetes 2>/dev/null || {
#  curl -L https://github.com/kubernetes/kubernetes/releases/download/v${KUBE_VERSION}/kubernetes.tar.gz -o kubernetes.tar.gz
#  tar xzf kubernetes.tar.gz
#  pushd kubernetes/server
#  tar xzf kubernetes-server-linux-amd64.tar.gz
#  popd
#  cp kubernetes/server/kubernetes/server/bin/kube-apiserver 
#     kubernetes/server/kubernetes/server/bin/kube-controller-manager 
#     kubernetes/server/kubernetes/server/bin/kube-scheduler binaries/master
#  cp kubernetes/server/kubernetes/server/bin/kubelet 
#     kubernetes/server/kubernetes/server/bin/kube-proxy binaries/minion
#  cp kubernetes/server/kubernetes/server/bin/kubectl binaries/
  echo ${KUBE_VERSION} > binaries/.kubernetes
}

#rm -rf flannel* kubernetes* etcd*

echo "Done! All your binaries locate in kubernetes/cluster/ubuntu/binaries directory"
popd