kubernetes 安装指南

1. 准备主机集群，并初始化各主机环境

使用vagrant创建一个3节点的主机集群，主机信息如下:

master：192.168.100.100
node1 ：192.168.100.101
node2 ：192.168.100.102

具体脚本请见 [Vagrantfile]

1.1 关闭防火墙
systemctl disable firewalld.service
systemctl stop firewalld.service

1.2 关闭selinux
getenforce
sestatus -v

setenforce 0
vim /etc/selinux/config
SELINUX=disabled

1.3 ntp 时间同步 ntpdate -u cn.pool.ntp.org

1.4 安装docker
systemctl enable docker
systemctl start docker
vim /lib/systemd/system/docker.service
ExecStartPost=/sbin/iptables -I FORWARD -s 0.0.0.0/0 -j ACCEPT

mkdir -p /etc/docker
tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": ["mirror 镜像地址"]
}
EOF

systemctl daemon-reload
systemctl restart docker

1.5 配置内核参数
cat <<EOF > /etc/sysctl.d/usernetwork.conf
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF

sysctl -p /etc/sysctl.d/usernetwork.conf

2. 部署etcd

2.1下载合适的发行包, 将etcd和etcdctl复制到/usr/bin

2.2应用配置
mkdir /etc/etcd/
cat <<EOF > /etc/etcd/etcd.conf
ETCD_NAME=default
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_CLIENT_URLS="http://127.0.0.1:2379,http://192.168.100.100:2379"
ETCD_ADVERTISE_CLIENT_URLS="http://192.168.100.100:2379"
EOF

2.3服务配置
mkdir /var/lib/etcd
cat <<EOF > /usr/lib/systemd/system/etcd.service
[Unit]
Description=Etcd Server
After=network.target

[Service]
Type=simple
WorkingDirectory=/var/lib/etcd/
EnvironmentFile=-/etc/etcd/etcd.conf
ExecStart=/usr/bin/etcd

[Install]
WantedBy=multi-user.target
EOF

2.4启动服务
systemctl enable etcd
systemctl start etcd

ETCDCTL_API=3
etcdctl put foo bar

3. 部署fannal网络方案

3.1 下载合适的发行包, 解压, 将flanneld复制到/usr/bin

3.2 应用网段配置
etcdctl --endpoints "http://192.168.100.100:2379" \
set /coreos.com/network/config '{"NetWork":"10.0.0.0/16", "SubnetMin": "10.0.1.0", "SubnetMax": "10.0.20.0"}'

3.3 服务配置
cat <<EOF > /usr/lib/systemd/system/flanneld.service
[Unit]
Description=Flanneld
After=network.target
Before=docker.service

[Service]
User=root
ExecStart=/usr/bin/flanneld \
--etcd-endpoints=http://192.168.100.100:2379 \
--iface=192.168.100.10x \
--ip-masq
Restart=on-failure
Type=notify
LimitNOFILE=65536
[Install]

WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl start flanneld

flanneld 在启动的时候坑最多， flanneld需要export etcdctl的API version 为2， endpoints前后不需要""

4. 部署master节点

5. 部署node节点

附录

A.切换yum镜像源
备份: mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
更新: wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

B.设置时区
tzselect