kubeadmのインストール

kubeadm対応ディストリ

dist	対応
CentOS 7	o
Ubuntu 16.04	o
Ubuntu 14.04	x
debian 9	x
debian 8	x
CentOS 6	x

CentOS 7 にインストール

• Installing kubeadm | Kubernetesの方法では以下.xml〜エラーが出る。
  • [Installation Failure] Mirror unavailable when yum install · Issue #37922 · kubernetes/kubernetes
• 以下修正版

/etc/yum.repos.d/kubernetes.repo

[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/
enabled=1
gpgcheck=1
repo_gpgcheck=0
gpgkey=https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg

# selinux無効
setenforce 0

# docker-engine
yum install -y docker
systemctl enable docker && systemctl start docker

# kubeadm
yum install -y kubelet kubeadm kubectl
systemctl enable kubelet && systemctl start kubelet

ansibleを使えば以下のようにかける

main.yml

- hosts: servers
  user: root

  tasks:

    - name: Disable SELinux
      selinux: state=disabled

    - name: Copy repo file.
      copy: src="files/kubernetes.repo" dest="/etc/yum.repos.d/kubernetes.repo"

    - name: Install docker
      yum: name=docker state=present

    - name: Install docker
      yum: name="{{ item }}" state=present
      with_items:
        - "docker"
        - "kubelet"
        - "kubeadm"
        - "kubectl"

    - name: Set docker service to start on boot.
      service: name=docker enabled=yes

    - name: Set kubelet service to start on boot.
      service: name=kubelet enabled=yes

    - name: upgrade all packages
      yum: name=* state=latest

Ubuntu 16.04 の場合

ansibleで入れてみよう。

mkdir files
touch ./files/docker.list \
 main.yml \
 hosts \
 run.sh

./files/docker.list

# deb https://apt.dockerproject.org/repo ubuntu-trusty main
deb https://apt.dockerproject.org/repo ubuntu-xenial main

main.yml

- hosts: server01
  user: root

  tasks:

    - name: Add docker gpg key.
      shell: "apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D"

    - name: Copy docker.list file.
      copy: src="files/docker.list" dest="/etc/apt/sources.list.d/docker.list"

    - name: Install docker-engine.
      apt: name=docker-engine state=present update_cache=yes

    - name: Set docker service to start on boot.
      service: name=docker enabled=yes

hosts

[server01]
11.22.33.44

run.sh

if [ ! -e /usr/sbin/ansible-playbook ];then
    sudo apt install -y ansible
fi
ansible-playbook -i hosts main.yml  -v

kubeadmのインストール

apt-get update && apt-get install -y apt-transport-https
curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -

echo "deb http://apt.kubernetes.io/ kubernetes-trusty main" > /etc/apt/sources.list.d/kubernetes.list

apt-get update
apt-get install -y kubelet kubeadm kubectl