k8s集群安装学习笔记九——证书有效期修改

证书有效期修改

证书可用时限

查看证书信息

openssl x509 -in aprserver.crt -text -noout

1、go 环境部署

wget https://dl.google.com/go/go1.12.7.linux-amd64.tar.gz 
tar -zxvf go1.12.1.linux-amd64.tar.gz -C /usr/local 
vim /etc/profile 
　　export PATH=$PATH:/usr/local/go/bin 
source /etc/profile

2、下载源码

cd /data && git clone https://github.com/kubernetes/kubernetes.git 

查看版本

 切换版本

git checkout -b remotes/origin/release-1.15.1 v1.15.1

3、修改 Kubeadm 源码包更新证书策略

vim staging/src/k8s.io/client-go/util/cert/cert.go # kubeadm 1.14 版本之前 
vim cmd/kubeadm/app/util/pkiutil/pki_helpers.go # kubeadm 1.14 至今 
    const duration365d = time.Hour * 24 * 365  #定义一个变量
    NotAfter: time.Now().Add(duration365d).UTC(), 

make WHAT=cmd/kubeadm GOFLAGS=-v  #只编译kubeadm
cp _output/bin/kubeadm /root/kubeadm-new

4、更新 kubeadm

# 将 kubeadm 进行替换 
cp /usr/bin/kubeadm /usr/bin/kubeadm.old #备份
cp /root/kubeadm-new /usr/bin/kubeadm  #替换
chmod a+x /usr/bin/kubeadm

5、更新各节点证书至 Master 节点

cp -r /etc/kubernetes/pki /etc/kubernetes/pki.old 
cd /etc/kubernetes/pki 
kubeadm alpha certs renew all --config=/usr/local/install-k8s/core/kubeadm-config.yaml 
#查看新证书信息
openssl x509 -in apiserver.crt -text -noout | grep Not

 

6、HA集群其余 mater 节点证书更新

#!/bin/bash 
masterNode="192.168.66.20 192.168.66.21" 
#for host in ${masterNode}; do 
# scp /etc/kubernetes/pki/{ca.crt,ca.key,sa.key,sa.pub,front-proxy-ca.crt,front-proxy-ca.key} "${USER}"@$host:/etc/kubernetes/pki/ 
# scp /etc/kubernetes/pki/etcd/{ca.crt,ca.key} "root"@$host:/etc/kubernetes/pki/etcd 
# scp /etc/kubernetes/admin.conf "root"@$host:/etc/kubernetes/ 
#done 
for host in ${CONTROL_PLANE_IPS}; do 
    scp /etc/kubernetes/pki/{ca.crt,ca.key,sa.key,sa.pub,front-proxy-ca.crt,front-proxy-ca.key} 
"${USER}"@$host:/root/pki/ 
    scp /etc/kubernetes/pki/etcd/{ca.crt,ca.key} "root"@$host:/root/etcd 
    scp /etc/kubernetes/admin.conf "root"@$host:/root/kubernetes/ 
done