Ubuntu 22.04LTS版本二进制部署K8S 1.30+版本
Ubuntu 22.04LTS版本二进制部署K8S 1.30+版本
目录
- 一.K8S集群各主机环境准备
- 二.安装containerd组件
- 三.containerd的名称空间，镜像和容器，任务管理快速入门
- 四.安装etcd程序
- 五.安装K8S程序
- 六.生成etcd证书文件
- 七.启动etcd集群
- 八.生成k8s组件相关证书
- 九.高可用组件haproxy+keepalived安装及验证
- 十.部署ApiServer组件
- 十一.部署ControlerManager组件
- 十二.部署Scheduler组件
- 十三.创建Bootstrapping自动颁发kubelet证书配置
- 十四.部署worker节点之kubelet启动实战
- 十五.部署worker节点之kube-proxy服务
- 十六.网络插件calico部署案例
- 十七.网络插件falnnel部署案例
- 十八.今日内容回顾及作业
一.K8S集群各主机环境准备
1.环境准备
| 主机名 | IP地址 | 角色划分 | 硬件配置 |
|---|---|---|---|
| k8s-master01 | 10.0.0.241 | api-server，control manager，scheduler，etcd | 2c，4GB，50GB+ |
| k8s-master02 | 10.0.0.242 | api-server，control manager，scheduler，etcd | 2c，4GB，50GB+ |
| k8s-master03 | 10.0.0.243 | api-server，control manager，scheduler，etcd | 2c，4GB，50GB+ |
| k8s-worker04 | 10.0.0.244 | kubelet，kube-proxy | 2c，4GB，50GB+ |
| k8s-worker05 | 10.0.0.245 | kubelet，kube-proxy | 2c，4GB，50GB+ |
| apiserver-lb | 10.0.0.240 | apiserver的负载均衡器IP地址 | 2c，4GB，50GB+ |
2.所有节点安装常用的软件包
apt update
apt -y install bind9-utils expect rsync jq psmisc net-tools lvm2 vim unzip rename
3.k8s-master01节点免密钥登录集群并同步数据
1 设置主机名,各节点参考如下命令修改即可
hostnamectl set-hostname k8s-master01
2 设置相应的主机名及hosts文件解析
cat >> /etc/hosts <<'EOF'
10.0.0.240 apiserver-lb
10.0.0.241 k8s-master01
10.0.0.242 k8s-master02
10.0.0.243 k8s-master03
10.0.0.244 k8s-worker04
10.0.0.245 k8s-worker05
EOF
3 配置免密码登录其他节点
[root@k8s-master01 ~]# cat > password_free_login.sh <<'EOF'
#!/bin/bash
# auther: Jason Yin
# 创建密钥对
ssh-keygen -t rsa -P "" -f /root/.ssh/id_rsa -q
# 声明你服务器密码，建议所有节点的密码均一致，否则该脚本需要再次进行优化
export mypasswd=yinzhengjie
# 定义主机列表
k8s_host_list=(k8s-master02 k8s-master03 k8s-worker04 k8s-worker05)
# 配置免密登录，利用expect工具免交互输入
for i in ${k8s_host_list[@]};do
expect -c "
spawn ssh-copy-id -i /root/.ssh/id_rsa.pub root@$i
expect {
\"*yes/no*\" {send \"yes\r\"; exp_continue}
\"*password*\" {send \"$mypasswd\r\"; exp_continue}
}"
done
EOF
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# bash password_free_login.sh
4 编写同步脚本
[root@k8s-master01 ~]# cat > /usr/local/sbin/data_rsync.sh <<'EOF'
#!/bin/bash
# Auther: Jason Yin
if [ $# -lt 1 ];then
echo "Usage: $0 /path/to/file(绝对路径) [mode: m|w]"
exit
fi
if [ ! -e $1 ];then
echo "[ $1 ] dir or file not find!"
exit
fi
fullpath=`dirname $1`
basename=`basename $1`
cd $fullpath
case $2 in
WORKER_NODE|w)
K8S_NODE=(k8s-master02 k8s-master03 k8s-worker04 k8s-worker05)
;;
MASTER_NODE|m)
K8S_NODE=(k8s-master02 k8s-master03)
;;
*)
K8S_NODE=(k8s-master02 k8s-master03 k8s-worker04 k8s-worker05)
;;
esac
for host in ${K8S_NODE[@]};do
tput setaf 2
echo ===== rsyncing ${host}: $basename =====
tput setaf 7
rsync -az $basename `whoami`@${host}:$fullpath
if [ $? -eq 0 ];then
echo "命令执行成功!"
fi
done
EOF
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# chmod +x /usr/local/sbin/data_rsync.sh
5 同步"/etc/hosts"文件到集群
[root@k8s-master01 ~]# data_rsync.sh /etc/hosts
4.所有节点Linux基础环境优化
1 所有节点关闭NetworkManager，ufw
systemctl disable --now NetworkManager ufw
2 所有节点关闭swap分区，fstab注释swap
swapoff -a && sysctl -w vm.swappiness=0
sed -ri '/^[^#]*swap/s@^@#@' /etc/fstab
free -h
3 手动同步时区和时间
ln -svf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
4 所有节点配置limit
cat >> /etc/security/limits.conf <<'EOF'
* soft nofile 655360
* hard nofile 131072
* soft nproc 655350
* hard nproc 655350
* soft memlock unlimited
* hard memlock unlimited
EOF
5.所有节点优化sshd服务
sed -i 's@#UseDNS yes@UseDNS no@g' /etc/ssh/sshd_config
sed -i 's@^GSSAPIAuthentication yes@GSSAPIAuthentication no@g' /etc/ssh/sshd_config
- UseDNS选项:
打开状态下，当客户端试图登录SSH服务器时，服务器端先根据客户端的IP地址进行DNS PTR反向查询出客户端的主机名，然后根据查询出的客户端主机名进行DNS正向A记录查询，验证与其原始IP地址是否一致，这是防止客户端欺骗的一种措施，但一般我们的是动态IP不会有PTR记录，打开这个选项不过是在白白浪费时间而已，不如将其关闭。
- GSSAPIAuthentication:
当这个参数开启（ GSSAPIAuthentication yes ）的时候，通过SSH登陆服务器时候会有些会很慢！这是由于服务器端启用了GSSAPI。登陆的时候客户端需要对服务器端的IP地址进行反解析，如果服务器的IP地址没有配置PTR记录，那么就容易在这里卡住了。
6.Linux内核调优
cat > /etc/sysctl.d/k8s.conf <<'EOF'
# 以下3个参数是containerd所依赖的内核参数
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv6.conf.all.disable_ipv6 = 1
fs.may_detach_mounts = 1
vm.overcommit_memory=1
vm.panic_on_oom=0
fs.inotify.max_user_watches=89100
fs.file-max=52706963
fs.nr_open=52706963
net.netfilter.nf_conntrack_max=2310720
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_probes = 3
net.ipv4.tcp_keepalive_intvl =15
net.ipv4.tcp_max_tw_buckets = 36000
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_orphans = 327680
net.ipv4.tcp_orphan_retries = 3
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.ip_conntrack_max = 65536
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_timestamps = 0
net.core.somaxconn = 16384
EOF
sysctl --system
7 修改终端颜色[可选]
cat <<EOF >> ~/.bashrc
PS1='[\[\e[34;1m\]\u@\[\e[0m\]\[\e[32;1m\]\H\[\e[0m\]\[\e[31;1m\] \W\[\e[0m\]]# '
EOF
source ~/.bashrc
5.所有节点安装ipvsadm以实现kube-proxy的负载均衡
1 安装ipvsadm等相关工具
apt -y install ipvsadm ipset sysstat conntrack libseccomp
2 所有节点创建要开机自动加载的模块配置文件
cat > /etc/modules-load.d/ipvs.conf << 'EOF'
ip_vs
ip_vs_lc
ip_vs_wlc
ip_vs_rr
ip_vs_wrr
ip_vs_lblc
ip_vs_lblcr
ip_vs_dh
ip_vs_sh
ip_vs_fo
ip_vs_nq
ip_vs_sed
ip_vs_ftp
ip_vs_sh
nf_conntrack
ip_tables
ip_set
xt_set
ipt_set
ipt_rpfilter
ipt_REJECT
ipip
EOF
3 修改ens33网卡名称为eth0【选做，建议修改】
3.1 修改配置文件
vim /etc/default/grub
...
GRUB_CMDLINE_LINUX="... net.ifnames=0 biosdevname=0"
3.2 用grub2-mkconfig重新生成配置
grub-mkconfig -o /boot/grub/grub.cfg
3.3 修改网卡配置
[root@k8s-master01 ~]# cat /etc/netplan/00-installer-config.yaml
network:
ethernets:
eth0:
dhcp4: false
addresses:
- 10.0.0.241/24
routes:
- to: default
via: 10.0.0.254
nameservers:
addresses:
# 114 DNS
- 114.114.114.114
- 114.114.115.115
# 阿里云DNS
- 223.5.5.5
- 223.6.6.6
# 腾讯云DNS
- 119.29.29.29
- 119.28.28.28
# 百度DNS
- 180.76.76.76
# Google DNS
- 8.8.8.8
- 4.4.4.4
version: 2
[root@k8s-master01 ~]#
4 重启操作系统即可
reboot
5.验证加载的模块
lsmod | grep --color=auto -e ip_vs -e nf_conntrack
uname -r
ifconfig
温馨提示:
Linux kernel 4.19+版本已经将之前的"nf_conntrack_ipv4"模块更名为"nf_conntrack"模块哟~
二.安装containerd组件
1.安装必要的一些系统工具
apt-get -y install apt-transport-https ca-certificates curl software-properties-common
2.安装GPG证书
curl -fsSL https://mirrors.aliyun.com/docker-ce/linux/ubuntu/gpg | apt-key add -
3.写入软件源信息
add-apt-repository "deb [arch=amd64] https://mirrors.aliyun.com/docker-ce/linux/ubuntu $(lsb_release -cs) stable"
4.更新软件源
apt-get update
5.安装containerd组件
apt-get -y install containerd.io
6.配置containerd需要的模块
1 临时手动加载模块
modprobe -- overlay
modprobe -- br_netfilter
2.开机自动加载所需的内核模块
cat > /etc/modules-load.d/containerd.conf <<EOF
overlay
br_netfilter
EOF
7. 修改containerd的配置文件
1.重新初始化containerd的配置文件
containerd config default | tee /etc/containerd/config.toml
2 修改Cgroup的管理者为systemd组件
sed -ri 's#(SystemdCgroup = )false#\1true#' /etc/containerd/config.toml
grep SystemdCgroup /etc/containerd/config.toml
3 修改pause的基础镜像名称
sed -i 's#registry.k8s.io/pause:3.6#registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.7#' /etc/containerd/config.toml
grep sandbox_image /etc/containerd/config.toml
8.所有节点启动containerd
1 启动containerd服务
systemctl daemon-reload
systemctl enable --now containerd
systemctl status containerd
2 配置crictl客户端连接的运行时位置
cat > /etc/crictl.yaml <<EOF
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false
EOF
3 查看containerd的版本
[root@k8s-worker05 ~]# ctr version
Client:
Version: 1.6.33
Revision: d2d58213f83a351ca8f528a95fbd145f5654e957
Go version: go1.21.11
Server:
Version: 1.6.33
Revision: d2d58213f83a351ca8f528a95fbd145f5654e957
UUID: 2edf9793-a435-4cd2-86fa-f15cc9572ad1
[root@k8s-worker05 ~]#
三.containerd的名称空间，镜像和容器，任务管理快速入门
1.名称空间管理
1 查看现有的名称空间
[root@k8s-master01 ~]# ctr ns ls
NAME LABELS
[root@k8s-master01 ~]#
2 创建名称空间
[root@k8s-master01 ~]# ctr ns c yinzhengjie-linux
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr ns ls
NAME LABELS
yinzhengjie-linux
[root@k8s-master01 ~]#
3 删除名称空间
[root@k8s-master01 ~]# ctr ns rm yinzhengjie-linux
yinzhengjie-linux
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr ns ls
NAME LABELS
[root@k8s-master01 ~]#
温馨提示:
删除的名称空间必须为空，否则无法删除！
2.镜像管理
1 拉取镜像到指定的名称空间
[root@k8s-master01 ~]# ctr ns c yinzhengjie-linux
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr ns ls
NAME LABELS
yinzhengjie-linux
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr image pull registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr ns ls
NAME LABELS
default
yinzhengjie-linux
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr i ls
REF TYPE DIGEST SIZE PLATFORMS LABELS
registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 application/vnd.docker.distribution.manifest.v2+json sha256:3bee216f250cfd2dbda1744d6849e27118845b8f4d55dda3ca3c6c1227cc2e5c 9.6 MiB linux/amd64 -
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr -n default i ls
REF TYPE DIGEST SIZE PLATFORMS LABELS
registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 application/vnd.docker.distribution.manifest.v2+json sha256:3bee216f250cfd2dbda1744d6849e27118845b8f4d55dda3ca3c6c1227cc2e5c 9.6 MiB linux/amd64 -
[root@k8s-master01 ~]#
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr -n yinzhengjie-linux i ls
REF TYPE DIGEST SIZE PLATFORMS LABELS
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr -n yinzhengjie-linux i ls
REF TYPE DIGEST SIZE PLATFORMS LABELS
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr -n yinzhengjie-linux image pull registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v2
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr -n yinzhengjie-linux i ls
REF TYPE DIGEST SIZE PLATFORMS LABELS
registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v2 application/vnd.docker.distribution.manifest.v2+json sha256:3ac38ee6161e11f2341eda32be95dcc6746f587880f923d2d24a54c3a525227e 9.6 MiB linux/amd64 -
[root@k8s-master01 ~]#
2.删除镜像
[root@k8s-master01 ~]# ctr -n default i ls
REF TYPE DIGEST SIZE PLATFORMS LABELS
registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1 application/vnd.docker.distribution.manifest.v2+json sha256:3bee216f250cfd2dbda1744d6849e27118845b8f4d55dda3ca3c6c1227cc2e5c 9.6 MiB linux/amd64 -
[root@k8s-master01 ~]#
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr i rm registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1
registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v1
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr -n default i ls
REF TYPE DIGEST SIZE PLATFORMS LABELS
[root@k8s-master01 ~]#
3.容器管理
1 运行一个容器
[root@k8s-master01 ~]# ctr -n yinzhengjie-linux run registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v2 haha
2 查看容器列表
[root@k8s-master01 ~]# ctr -n yinzhengjie-linux c ls
CONTAINER IMAGE RUNTIME
haha registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v2 io.containerd.runc.v2
[root@k8s-master01 ~]#
3 查看正在运行的容器ID
[root@k8s-master01 ~]# ctr -n yinzhengjie-linux t ls
TASK PID STATUS
haha 4842 RUNNING
[root@k8s-master01 ~]#
4 连接正在运行的容器
[root@k8s-master01 ~]# ctr -n yinzhengjie-linux t exec -t --exec-id 2024 haha sh
/ #
/ # ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
/ #
温馨提示:
containerd本身并不提供网络，只负责容器的生命周期。
将来网络部分交给专门的CNI插件提供。
5 杀死一个正在运行的容器
[root@k8s-master01 ~]# ctr -n yinzhengjie-linux t ls
TASK PID STATUS
haha 4842 RUNNING
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr -n yinzhengjie-linux t kill haha
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr -n yinzhengjie-linux t ls
TASK PID STATUS
[root@k8s-master01 ~]#
6 删除容器
[root@k8s-master01 ~]# ctr -n yinzhengjie-linux c ls
CONTAINER IMAGE RUNTIME
haha registry.cn-hangzhou.aliyuncs.com/yinzhengjie-k8s/apps:v2 io.containerd.runc.v2
[root@k8s-master01 ~]#
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr -n yinzhengjie-linux c rm haha
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ctr -n yinzhengjie-linux c ls
CONTAINER IMAGE RUNTIME
[root@k8s-master01 ~]#
更多containerd学习资料推荐：
https://www.cnblogs.com/yinzhengjie/p/18030527
https://www.cnblogs.com/yinzhengjie/p/18058010
四.安装etcd程序
1.下载etcd的软件包
[root@k8s-master01 ~]# wget https://github.com/etcd-io/etcd/releases/download/v3.5.14/etcd-v3.5.14-linux-amd64.tar.gz
2.解压etcd的二进制程序包到PATH环境变量路径
1 解压软件包
[root@k8s-master01 ~]# tar -xf etcd-v3.5.14-linux-amd64.tar.gz --strip-components=1 -C /usr/local/bin etcd-v3.5.14-linux-amd64/etcd{,ctl}
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ll /usr/local/bin/
total 39760
drwxr-xr-x 2 root root 4096 Jun 24 14:39 ./
drwxr-xr-x 10 root root 4096 Aug 10 2023 ../
-rwxr-xr-x 1 yinzhengjie yinzhengjie 23162880 May 30 02:35 etcd*
-rwxr-xr-x 1 yinzhengjie yinzhengjie 17543168 May 30 02:35 etcdctl*
[root@k8s-master01 ~]#
2 查看etcd版本
[root@k8s-master01 ~]# etcdctl version
etcdctl version: 3.5.14
API version: 3.5
[root@k8s-master01 ~]#
3.将软件包下发到所有节点
[root@k8s-master01 ~]# data_rsync.sh /usr/local/bin/etcd m
===== rsyncing k8s-master02: etcd =====
命令执行成功!
===== rsyncing k8s-master03: etcd =====
命令执行成功!
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# data_rsync.sh /usr/local/bin/etcdctl m
===== rsyncing k8s-master02: etcdctl =====
命令执行成功!
===== rsyncing k8s-master03: etcdctl =====
命令执行成功!
[root@k8s-master01 ~]#
五.安装K8S程序
1.下载软件包
[root@k8s-master01 ~]# wget https://dl.k8s.io/v1.30.2/kubernetes-server-linux-amd64.tar.gz
2 解压K8S的二进制程序包到PATH环境变量路径
1 解压软件包
[root@k8s-master01 ~]# tar -xf kubernetes-server-linux-amd64.tar.gz --strip-components=3 -C /usr/local/bin kubernetes/server/bin/kube{let,ctl,-apiserver,-controller-manager,-scheduler,-proxy}
2 查看kubelet的版本
[root@k8s-master01 ~]# kubelet --version
Kubernetes v1.30.2
[root@k8s-master01 ~]#
3.分发软件包
[root@k8s-master01 ~]# data_rsync.sh /usr/local/bin/kube-apiserver m
[root@k8s-master01 ~]# data_rsync.sh /usr/local/bin/kube-scheduler m
[root@k8s-master01 ~]# data_rsync.sh /usr/local/bin/kube-controller-manager m
[root@k8s-master01 ~]# data_rsync.sh /usr/local/bin/kubectl m
[root@k8s-master01 ~]# data_rsync.sh /usr/local/bin/kubelet w
[root@k8s-master01 ~]# data_rsync.sh /usr/local/bin/kube-proxy w
六.生成etcd证书文件
1.安装cfssl证书管理工具
github下载地址:
https://github.com/cloudflare/cfssl
温馨提示:
生成K8S和etcd证书这一步骤很关键，我建议各位在做实验前先对K8S集群的所有节点拍一下快照，以避免你实验做失败了方便回滚。
关于cfssl证书可以自行在github下载即可，当然也可以使用我课堂上给大家下载好的软件包哟。
下载软件包:
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.5/cfssl-certinfo_1.6.5_linux_amd64
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.5/cfssljson_1.6.5_linux_amd64
wget https://github.com/cloudflare/cfssl/releases/download/v1.6.5/cfssl_1.6.5_linux_amd64
使用我的软件包具体操作如下：
1 解压压缩包
[root@k8s-master01 ~]# unzip yinzhengjie-cfssl-v1.6.5.zip
2 重命名cfssl的版本号信息
[root@k8s-master01 ~]# ll cfssl*
-rw-r--r-- 1 root root 11890840 Jun 15 11:56 cfssl_1.6.5_linux_amd64
-rw-r--r-- 1 root root 8413336 Jun 15 11:56 cfssl-certinfo_1.6.5_linux_amd64
-rw-r--r-- 1 root root 6205592 Jun 15 11:56 cfssljson_1.6.5_linux_amd64
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# rename -v "s/_1.6.5_linux_amd64//g" cfssl*
cfssl_1.6.5_linux_amd64 renamed as cfssl
cfssl-certinfo_1.6.5_linux_amd64 renamed as cfssl-certinfo
cfssljson_1.6.5_linux_amd64 renamed as cfssljson
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ll cfssl*
-rw-r--r-- 1 root root 11890840 Jun 15 11:56 cfssl
-rw-r--r-- 1 root root 8413336 Jun 15 11:56 cfssl-certinfo
-rw-r--r-- 1 root root 6205592 Jun 15 11:56 cfssljson
[root@k8s-master01 ~]#
3 将cfssl证书拷贝到环境变量并授权执行权限
[root@k8s-master01 ~]# mv cfssl* /usr/local/bin/
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# chmod +x /usr/local/bin/cfssl*
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# ll /usr/local/bin/cfssl*
-rwxr-xr-x 1 root root 11890840 Jun 15 11:56 /usr/local/bin/cfssl*
-rwxr-xr-x 1 root root 8413336 Jun 15 11:56 /usr/local/bin/cfssl-certinfo*
-rwxr-xr-x 1 root root 6205592 Jun 15 11:56 /usr/local/bin/cfssljson*
[root@k8s-master01 ~]#
2.k8s-master01节点创建etcd证书存储目录
[root@k8s-master01 ~]# mkdir -pv /yinzhengjie/certs/{etcd,pki}/ && cd /yinzhengjie/certs/pki/
3 k8s-master01节点生成etcd证书的自建ca证书
1.生成证书的CSR文件： 证书签发请求文件，配置了一些域名，公司，单位
[root@k8s-master01 pki]# cat > etcd-ca-csr.json <<EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
],
"ca": {
"expiry": "876000h"
}
}
EOF
2 生成etcd CA证书和CA证书的key
[root@k8s-master01 pki]# cfssl gencert -initca etcd-ca-csr.json | cfssljson -bare /yinzhengjie/certs/etcd/etcd-ca
2024/06/24 15:14:28 [INFO] generating a new CA key and certificate from CSR
2024/06/24 15:14:28 [INFO] generate received request
2024/06/24 15:14:28 [INFO] received CSR
2024/06/24 15:14:28 [INFO] generating key: rsa-2048
2024/06/24 15:14:29 [INFO] encoded CSR
2024/06/24 15:14:29 [INFO] signed certificate with serial number 45472152341303655022232330737492953237610051483
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# pwd
/yinzhengjie/certs/pki
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# ll /yinzhengjie/certs/etcd/
total 20
drwxr-xr-x 2 root root 4096 Jun 24 15:14 ./
drwxr-xr-x 4 root root 4096 Jun 24 15:12 ../
-rw-r--r-- 1 root root 1050 Jun 24 15:14 etcd-ca.csr
-rw------- 1 root root 1679 Jun 24 15:14 etcd-ca-key.pem
-rw-r--r-- 1 root root 1318 Jun 24 15:14 etcd-ca.pem
[root@k8s-master01 pki]#
4 k8s-master01节点基于自建ca证书颁发etcd证书
1 生成etcd证书的有效期为100年
[root@k8s-master01 pki]# cat > ca-config.json <<EOF
{
"signing": {
"default": {
"expiry": "876000h"
},
"profiles": {
"kubernetes": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "876000h"
}
}
}
}
EOF
2 生成证书的CSR文件： 证书签发请求文件，配置了一些域名，公司，单位
[root@k8s-master01 pki]# cat > etcd-csr.json <<EOF
{
"CN": "etcd",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "Beijing",
"L": "Beijing",
"O": "etcd",
"OU": "Etcd Security"
}
]
}
EOF
3.基于自建的ectd ca证书生成etcd的证书
[root@k8s-master01 pki]# cfssl gencert \
-ca=/yinzhengjie/certs/etcd/etcd-ca.pem \
-ca-key=/yinzhengjie/certs/etcd/etcd-ca-key.pem \
-config=ca-config.json \
--hostname=127.0.0.1,k8s-master01,k8s-master02,k8s-master03,10.0.0.241,10.0.0.242,10.0.0.243 \
--profile=kubernetes \
etcd-csr.json | cfssljson -bare /yinzhengjie/certs/etcd/etcd-server
[root@k8s-master01 pki]# ll /yinzhengjie/certs/etcd/etcd-server*
-rw-r--r-- 1 root root 1131 Jun 24 15:18 /yinzhengjie/certs/etcd/etcd-server.csr
-rw------- 1 root root 1679 Jun 24 15:18 /yinzhengjie/certs/etcd/etcd-server-key.pem
-rw-r--r-- 1 root root 1464 Jun 24 15:18 /yinzhengjie/certs/etcd/etcd-server.pem
[root@k8s-master01 pki]#
5.k8s-master01节点将etcd证书拷贝到其他两个master节点
[root@k8s-master01 pki]# MasterNodes='k8s-master02 k8s-master03'
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# for NODE in $MasterNodes; do ssh $NODE "mkdir -pv /yinzhengjie/certs/etcd/" done
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# data_rsync.sh /yinzhengjie/certs/etcd/etcd-ca-key.pem m
===== rsyncing k8s-master02: etcd-ca-key.pem =====
命令执行成功!
===== rsyncing k8s-master03: etcd-ca-key.pem =====
命令执行成功!
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# data_rsync.sh /yinzhengjie/certs/etcd/etcd-ca.pem m
===== rsyncing k8s-master02: etcd-ca.pem =====
命令执行成功!
===== rsyncing k8s-master03: etcd-ca.pem =====
命令执行成功!
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# data_rsync.sh /yinzhengjie/certs/etcd/etcd-server-key.pem m
===== rsyncing k8s-master02: etcd-server-key.pem =====
命令执行成功!
===== rsyncing k8s-master03: etcd-server-key.pem =====
命令执行成功!
[root@k8s-master01 pki]#
[root@k8s-master01 pki]# data_rsync.sh /yinzhengjie/certs/etcd/etcd-server.pem m
===== rsyncing k8s-master02: etcd-server.pem =====
命令执行成功!
===== rsyncing k8s-master03: etcd-server.pem =====
命令执行成功!
[root@k8s-master01 pki]#
七.启动etcd集群
1 创建etcd集群各节点配置文件
1 k8s-master01节点的配置文件
[root@k8s-master01 ~]# mkdir -pv /yinzhengjie/softwares/etcd
[root@k8s-master01 ~]# cat > /yinzhengjie/softwares/etcd/etcd.config.yml <<'EOF'
name: 'k8s-master01'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://10.0.0.241:2380'
listen-client-urls: 'https://10.0.0.241:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://10.0.0.241:2380'
advertise-client-urls: 'https://10.0.0.241:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://10.0.0.241:2380,k8s-master02=https://10.0.0.242:2380,k8s-master03=https://10.0.0.243:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/yinzhengjie/certs/etcd/etcd-server.pem'
key-file: '/yinzhengjie/certs/etcd/etcd-server-key.pem'
client-cert-auth: true
trusted-ca-file: '/yinzhengjie/certs/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/yinzhengjie/certs/etcd/etcd-server.pem'
key-file: '/yinzhengjie/certs/etcd/etcd-server-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/yinzhengjie/certs/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
2 k8s-master02节点的配置文件
[root@k8s-master02 ~]# mkdir -pv /yinzhengjie/softwares/etcd
[root@k8s-master02 ~]# cat > /yinzhengjie/softwares/etcd/etcd.config.yml << 'EOF'
name: 'k8s-master02'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://10.0.0.242:2380'
listen-client-urls: 'https://10.0.0.242:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://10.0.0.242:2380'
advertise-client-urls: 'https://10.0.0.242:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://10.0.0.241:2380,k8s-master02=https://10.0.0.242:2380,k8s-master03=https://10.0.0.243:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: 'off'
proxy-failure-wait: 5000
proxy-refresh-interval: 30000
proxy-dial-timeout: 1000
proxy-write-timeout: 5000
proxy-read-timeout: 0
client-transport-security:
cert-file: '/yinzhengjie/certs/etcd/etcd-server.pem'
key-file: '/yinzhengjie/certs/etcd/etcd-server-key.pem'
client-cert-auth: true
trusted-ca-file: '/yinzhengjie/certs/etcd/etcd-ca.pem'
auto-tls: true
peer-transport-security:
cert-file: '/yinzhengjie/certs/etcd/etcd-server.pem'
key-file: '/yinzhengjie/certs/etcd/etcd-server-key.pem'
peer-client-cert-auth: true
trusted-ca-file: '/yinzhengjie/certs/etcd/etcd-ca.pem'
auto-tls: true
debug: false
log-package-levels:
log-outputs: [default]
force-new-cluster: false
EOF
3 k8s-master03节点的配置文件
[root@k8s-master03 ~]# mkdir -pv /yinzhengjie/softwares/etcd
[root@k8s-master03 ~]# cat > /yinzhengjie/softwares/etcd/etcd.config.yml << 'EOF'
name: 'k8s-master03'
data-dir: /var/lib/etcd
wal-dir: /var/lib/etcd/wal
snapshot-count: 5000
heartbeat-interval: 100
election-timeout: 1000
quota-backend-bytes: 0
listen-peer-urls: 'https://10.0.0.243:2380'
listen-client-urls: 'https://10.0.0.243:2379,http://127.0.0.1:2379'
max-snapshots: 3
max-wals: 5
cors:
initial-advertise-peer-urls: 'https://10.0.0.243:2380'
advertise-client-urls: 'https://10.0.0.243:2379'
discovery:
discovery-fallback: 'proxy'
discovery-proxy:
discovery-srv:
initial-cluster: 'k8s-master01=https://10.0.0.241:2380,k8s-master02=https://10.0.0.242:2380,k8s-master03=https://10.0.0.243:2380'
initial-cluster-token: 'etcd-k8s-cluster'
initial-cluster-state: 'new'
strict-reconfig-check: false
enable-v2: true
enable-pprof: true
proxy: