我是靠谱客的博主 勤奋鱼,最近开发中收集的这篇文章主要介绍二进制部署K8s集群(一) etcd集群二进制部署K8s集群(一) etcd集群,觉得挺不错的,现在分享给大家,希望可以做个参考。

概述

文章目录

  • 二进制部署K8s集群(一) etcd集群
      • 前置准备
      • 操作系统初始化
      • 部署Etcd集群
        • 使用cfssl生成证书
        • 自签证书颁发机构(CA)
        • 使用自签的CA签Etcd Https证书
        • 下载etcd二进制文件并配置
          • 验证

二进制部署K8s集群(一) etcd集群

前置准备

主机名IP说明
master192.168.1.39控制节点
proxy192.168.1.252跳板机
node-0001192.168.1.40工作节点1
node-0002192.168.1.41工作节点2
node-0003192.168.1.42工作节点3

操作系统初始化

#master node1~3
#关闭防火墙
systemctl stop firewalld
systemctl disable firewalld
#关闭selinux
sed -i 's/enforcing/disabled/' /etc/selinux/config
setenforce 0
#关闭swap
swapoff -a
sed -ri 's/.*swap.*/#&/' /etc/fstab
#将桥接的IPv4流量传递到Iptables的链
cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables=1
net.bridge.bridge-nf-call-iptables=1
EOF
sysctl --system
#生效
#单单master中添加主机名

cat >> /etc/hosts << EOF
192.168.1.40 node1-0001
192.168.1.41 node1-0002
192.168.1.42 node1-0003
192.168.1.39 master1
EOF
#时间同步
yum install ntpdate -y
ntpdate time.windows.com

部署Etcd集群

主机名IP说明
node1-0001192.168.1.40etcd-1
node1-0002192.168.1.41etcd-2
node1-0003192.168.1.42etcd-3

使用cfssl生成证书

#master 上完成 任选
#下载cfssl的程序
#json格式生成
还有openssl
较难
wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
#添加执行权限
chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64
#移动到相应目录
mv cfssl_linux-amd64 /usr/local/bin/cfssl
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo

自签证书颁发机构(CA)

#master
mkdir -p ~/TLS/{etcd,k8s}
cd ~/TLS/etcd
cat > ca-config.json << EOF
{
"signing": {
"default": {
"expiry": "87600h"
},
"profiles": {
"www": {
"expiry": "87600h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF
cat > ca-csr.json << EOF
{
"CN": "etcd CA",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "Beijing",
"ST": "Beijing"
}
]
}
EOF
#生成证书
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
ls
#查看生成
ca-key.pem ca.pem

使用自签的CA签Etcd Https证书

#创建证书申请文件
cat > server-csr.json << EOF
{
"CN": "etcd",
"hosts": [
#内部通信用IP 可以多设置预留
"192.168.1.40",
"192.168.1.41",
"192.168.1.42"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"L": "BeiJing",
"ST": "BeiJing"
}
]
}
EOF
#生成证书
cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
ls
#查看
server-key.pem
server.pem
#到这
就有了 ca-key.pem ca.pem
server-key.pem server.pem
#将生成的证书发送到节点上
scp ~/TLS/etcd/ca*pem ~/TLS/etcd/server*pem
节点:/opt/etcd/ssl/

下载etcd二进制文件并配置

https://github.com/etcd-io/etcd/releases/download/v3.4.9/etcd-v3.4.9-linux-amd64.tar.gz

#node1-0001 上下载
mkdir -p /opt/etcd/{bin,cfg,ssl}
tar -zxvf etcd-v3.4.9-linux-amd64.tar.gz
#复制二进制程序到目录下
mv etcd-v3.4.9-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/
#创建etcd配置文件
vim /opt/etcd/cfg/etcd.conf
======================
#[Member]
#节点名称,集群中唯一
ETCD_NAME="etcd-1"
#数据目录
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
#集群通信监听地址
ETCD_LISTEN_PEER_URLS="https://192.168.1.40:2380"
#客户端访问监听地址
ETCD_LISTEN_CLIENT_URLS="https://192.168.1.40:2379"
#[Clustering]
#集群通告地址
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.1.40:2380"
#客户端通告地址
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.1.40:2379"
#集群节点地址
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.1.40:2380,etcd-2=https://192.168.1.41:2380,etcd-3=https://192.168.1.42:2380"
#集群Token
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
#加入集群的当前状态,new是新集群,existing表示加入已有集群
ETCD_INITIAL_CLUSTER_STATE="new"
================================
#配置Unit文件
使得可以用systemctl 管理
vim /usr/lib/systemd/system/etcd.service
========================================
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target
[Service]
Type=notify
EnvironmentFile=/opt/etcd/cfg/etcd.conf
#配置文件
ExecStart=/opt/etcd/bin/etcd 
#启动命令
--cert-file=/opt/etcd/ssl/server.pem 
#参数
证书
--key-file=/opt/etcd/ssl/server-key.pem 
--peer-cert-file=/opt/etcd/ssl/server.pem 
--peer-key-file=/opt/etcd/ssl/server-key.pem 
--trusted-ca-file=/opt/etcd/ssl/ca.pem 
--peer-trusted-ca-file=/opt/etcd/ssl/ca.pem 
--logger=zap
Restart=on-failure
LimitNOFILE=65536
[Install]
WantedBy=multi-user.target
============================================
#复制配置文件和Unit文件到另外两个节点 41和42
scp -r /opt/etcd root@192.168.1.41:/opt/
scp /usr/lib/systemd/system/etcd.service root@192.168.1.41:/usr/lib/systemd/system/
#修改另两台etcd节点的etcd配置文件信息
vim /opt/etcd/cfg/etcd.conf
=======================
#[Member]
#节点名称,集群中唯一
ETCD_NAME="etcd-2"
#41为2 
#数据目录
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
#集群通信监听地址
ETCD_LISTEN_PEER_URLS="https://192.168.1.41:2380"
#修改
#客户端访问监听地址
ETCD_LISTEN_CLIENT_URLS="https://192.168.1.41:2379"
#修改
#[Clustering]
#集群通告地址
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.1.41:2380" #修改
#客户端通告地址
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.1.41:2379" #修改
#集群节点地址
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.1.40:2380,etcd-2=https://192.168.1.41:2380,etcd-3=https://192.168.1.42:2380"
#集群Token
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
#加入集群的当前状态,new是新集群,existing表示加入已有集群
ETCD_INITIAL_CLUSTER_STATE="new"
=========================================
#配置三个节点的etcd.conf后
启动服务
systemctl daemon-reload
#重载服务
新加了etcd.service
systemctl enable --now etcd
#开机自启
启动
验证

跳板机ansible查看

#proxy
ansible docker2 -m shell -a "systemctl status etcd"
#42的状态OK
192.168.1.42 | CHANGED | rc=0 >>
● etcd.service - Etcd Server
Loaded: loaded (/usr/lib/systemd/system/etcd.service; enabled; vendor preset: disabled)
Active: active (running) since Sat 2021-03-06 14:21:39 CST; 2h 19min ago
#状态为ac (run)
Main PID: 714 (etcd)
Tasks: 10
Memory: 31.8M
CGroup: /system.slice/etcd.service
└─714 /opt/etcd/bin/etcd --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --peer-cert-file=/opt/etcd/ssl/server.pem --peer-key-file=/opt/etcd/ssl/server-key.pem --trusted-ca-file=/opt/etcd/ssl/ca.pem --peer-trusted-ca-file=/opt/etcd/ssl/ca.pem --logger=zap
#41的状态OK
192.168.1.41 | CHANGED | rc=0 >>
● etcd.service - Etcd Server
Loaded: loaded (/usr/lib/systemd/system/etcd.service; enabled; vendor preset: disabled)
Active: active (running) since Sat 2021-03-06 14:21:49 CST; 2h 18min ago
Main PID: 757 (etcd)
Tasks: 11
Memory: 29.5M
CGroup: /system.slice/etcd.service
└─757 /opt/etcd/bin/etcd --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --peer-cert-file=/opt/etcd/ssl/server.pem --peer-key-file=/opt/etcd/ssl/server-key.pem --trusted-ca-file=/opt/etcd/ssl/ca.pem --peer-trusted-ca-file=/opt/etcd/ssl/ca.pem --logger=zap
#40的状态OK
192.168.1.40 | CHANGED | rc=0 >>
● etcd.service - Etcd Server
Loaded: loaded (/usr/lib/systemd/system/etcd.service; enabled; vendor preset: disabled)
Active: active (running) since Sat 2021-03-06 14:21:37 CST; 2h 19min ago
Main PID: 705 (etcd)
Tasks: 11
Memory: 31.1M
CGroup: /system.slice/etcd.service
└─705 /opt/etcd/bin/etcd --cert-file=/opt/etcd/ssl/server.pem --key-file=/opt/etcd/ssl/server-key.pem --peer-cert-file=/opt/etcd/ssl/server.pem --peer-key-file=/opt/etcd/ssl/server-key.pem --trusted-ca-file=/opt/etcd/ssl/ca.pem --peer-trusted-ca-file=/opt/etcd/ssl/ca.pem --logger=zap
#查看集群
之后改的
又加了一个master的节点作为etcd节点
证书配置加个地址
节点地址加一个
/opt/etcd/bin/etcdctl --cacert=/opt/etcd/ssl/ca.pem --cert=/opt/etcd/ssl/server.pem --key=/opt/etcd/ssl/server-key.pem 
> --endpoints="https://192.168.1.39:2379,https://192.168.1.40:2379,https://192.168.1.41:2379,https://192.168.1.42:2379" 
> endpoint health
https://192.168.1.41:2379 is healthy: successfully committed proposal: took = 15.244131ms
https://192.168.1.40:2379 is healthy: successfully committed proposal: took = 15.171511ms
https://192.168.1.39:2379 is healthy: successfully committed proposal: took = 17.114115ms
https://192.168.1.42:2379 is healthy: successfully committed proposal: took = 17.165271ms

最后

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