二进制部署K8S-2集群部署
感谢老男孩教育王导的公开视频，文档整理自https://www.yuque.com/duduniao/k8s。
因为在后期运行容器需要有大量的物理硬件资源使用的环境是用的Wmware EXSI如果使用笔记本可适当调整虚拟机配置。
| 角色 | 主机名 | IP | CPU | Mem | OS |
|---|---|---|---|---|---|
| (主)负载均衡、内网DNS | 10.4.7.11 | 4C | 4G | CentOS Linux release 7.8 | |
| (备)负载均衡、内网DNS | 10.4.7.12 | 4C | 4G | CentOS Linux release 7.8 | |
| k8s master、k8s node、etcd | 10.4.7.21 | 4C | 8G | CentOS Linux release 7.8 | |
| k8s master、k8s node、etcd | 10.4.7.22 | 4C | 8G | CentOS Linux release 7.8 | |
| harbor私有仓库、nfs | 10.4.7.200 | 4C | 4G | CentOS Linux release 7.8 |
2. 安装前准备
2.1. 环境准备
所有机器都需要执行
[root@hdss7-11 ~]# systemctl stop firewalld [root@hdss7-11 ~]# systemctl disable firewalld [root@hdss7-11 ~]# setenforce 0 [root@hdss7-11 ~]# sed -ir '/^SELINUX=/s/=.+/=disabled/' /etc/selinux/config [root@hdss7-11 ~]# yum install -y epel-release [root@hdss7-11 ~]# yum install -y wget net-tools telnet tree nmap sysstat lrzsz dos2unix bind-utils vim less ntpdate # 所有机器时间同步，生产环境需要有时间同步服务器。 ntpdate
2.2. bind安装
2.2.1. hdss7-11 安装bind
[root@hdss7-11 ~]# yum install -y bind
2.2.2. hdss7-11 配置bind
- 主配置文件
[root@hdss7-11 ~]# vim /etc/named.conf # 确保以下配置正确
listen-on port 53 { 10.4.7.11; };
directory "/var/named";
allow-query { any; };
forwarders { 10.4.7.254; }; # 上级DNS，需要手动添加
recursion yes;
dnssec-enable no;
dnssec-validation no;- 在 配置区域文件
# 增加两个zone配置，为业务域，host.com.zone为主机域
[root@hdss7-11 ~]# cat>>/etc/named.rfc1912.zones<<EOF
zone "host.com" IN {
type master;
file "host.com.zone";
allow-update { 10.4.7.11; };
};
zone "" IN {
type master;
file ".zone";
allow-update { 10.4.7.11; };
};
EOF- 在 配置主机域文件
# line6中时间需要修改 [root@hdss7-11 ~]# vim /var/named/host.com.zone $ORIGIN host.com. $TTL 600 ; 10 minutes @ IN SOA . . ( 2021043001 ; serial 10800 ; refresh (3 hours) 900 ; retry (15 minutes) 604800 ; expire (1 week) 86400 ; minimum (1 day) ) NS . $TTL 60 ; 1 minute dns A 10.4.7.11 HDSS7-11 A 10.4.7.11 HDSS7-12 A 10.4.7.12 HDSS7-21 A 10.4.7.21 HDSS7-22 A 10.4.7.22 HDSS7-200 A 10.4.7.200
- 在 配置业务域文件
[root@hdss7-11 ~]# vim /var/named/.zone $ORIGIN . $TTL 600 ; 10 minutes @ IN SOA dns.. dnsadmin.. ( 2021043001 ; serial 10800 ; refresh (3 hours) 900 ; retry (15 minutes) 604800 ; expire (1 week) 86400 ; minimum (1 day) ) NS dns.. $TTL 60 ; 1 minute dns A 10.4.7.11
- 在 启动bind服务，并测试
[root@hdss7-11 ~]# named-checkconf # 检查配置文件 [root@hdss7-11 ~]# systemctl start named ; systemctl enable named [root@hdss7-11 ~]# host HDSS7-200 10.4.7.11 Using domain server: Name: 10.4.7.11 Address: 10.4.7.11#53 Aliases: has address 10.4.7.200
2.2.3. 修改宿主机DNS
- 修改所有主机的dns服务器地址
[root@hdss7-11 ~]# sed -i '/DNS1/s/10.4.7.254/10.4.7.11/' /etc/sysconfig/network-scripts/ifcfg-ens32 [root@hdss7-11 ~]# systemctl restart network [root@hdss7-11 ~]# cat /etc/resolv.conf # Generated by NetworkManager search host.com nameserver 10.4.7.11
- 这里的客户机是windows，直接更改的hosts
10.4.7.11 10.4.7.12 10.4.7.21 10.4.7.22 10.4.7.200 harbor. k8s-yaml. wlw. 10.4.7.10 traefik. dashboard. jenkins. dubbo-monitor. demo.
2.3. 根证书准备
- 在 hdss7-200 下载工具
[root@hdss7-200 ~]# wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -O /usr/local/bin/cfssl [root@hdss7-200 ~]# wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -O /usr/local/bin/cfssl-json [root@hdss7-200 ~]# wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -O /usr/local/bin/cfssl-certinfo [root@hdss7-200 ~]# chmod u+x /usr/local/bin/cfssl*
- 在 hdss7-200 签发根证书
[root@hdss7-200 ~]# mkdir /opt/certs/ ; cd /opt/certs/
# 根证书配置：
# CN 一般写域名，浏览器会校验
# names 为地区和公司信息
# expiry 为过期时间
[root@hdss7-200 certs]# cat>>/opt/certs/ca-csr.json<<EOF
{
"CN": "OldboyEdu",
"hosts": [
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
],
"ca": {
"expiry": "175200h"
}
}
EOF
[root@hdss7-200 certs]# cfssl gencert -initca ca-csr.json | cfssl-json -bare ca
2020/01/05 10:42:07 [INFO] generating a new CA key and certificate from CSR
2020/01/05 10:42:07 [INFO] generate received request
2020/01/05 10:42:07 [INFO] received CSR
2020/01/05 10:42:07 [INFO] generating key: rsa-2048
2020/01/05 10:42:08 [INFO] encoded CSR
2020/01/05 10:42:08 [INFO] signed certificate with serial number 451005524427475354617025362003367427117323539780
[root@hdss7-200 certs]# ls -l ca*
-rw-r--r-- 1 root root 993 Jan 5 10:42 ca.csr
-rw-r--r-- 1 root root 328 Jan 5 10:39 ca-csr.json
-rw------- 1 root root 1675 Jan 5 10:42 ca-key.pem
-rw-r--r-- 1 root root 1346 Jan 5 10:42 ca.pem2.4. docker环境准备
需要安装docker的机器：hdss7-21 hdss7-22 hdss7-200，以hdss7-21为例
[root@hdss7-21 ~]# wget -O /etc/yum.repos.d/docker-ce.repo https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
[root@hdss7-21 ~]# yum install -y docker-ce
# 不安全的registry中增加了harbor地址
# 各个机器上bip网段不一致，bip中间两段与宿主机最后两段相同，目的是方便定位问题
[root@hdss7-21 ~]# mkdir /etc/docker/
[root@hdss7-21 ~]# vim /etc/docker/daemon.json
{
"graph": "/data/docker",
"storage-driver": "overlay2",
"insecure-registries": ["","quay.io","harbor."],
"registry-mirrors": ["https://"],
"bip": "172.7.21.1/24",
"exec-opts": ["native.cgroupdriver=systemd"],
"live-restore": true
}
[root@hdss7-21 ~]# mkdir /data/docker
[root@hdss7-21 ~]# systemctl start docker ; systemctl enable docker2.5. harbor安装
参考地址：https://www.yuque.com/duduniao/trp3ic/ohrxds#9Zpxx
官方地址：https://goharbor.io/
下载地址：https:///goharbor/harbor/releases
2.5.1. hdss7-200 安装harbor
# 目录说明：
# /opt/src : 源码、文件下载目录
# /opt/release : 各个版本软件存放位置
# /opt/apps : 各个软件当前版本的软链接
[root@hdss7-200 ~]# mkdir /opt/{src,apps,release}
[root@hdss7-200 ~]# cd /opt/src
[root@hdss7-200 src]# wget https:///goharbor/harbor/releases/download/v1.9.4/harbor-offline-installer-v1.9.4.tgz
[root@hdss7-200 src]# tar -xvf harbor-offline-installer-v1.9.4.tgz
[root@hdss7-200 src]# mv harbor /opt/release/harbor-v1.9.4
[root@hdss7-200 src]# ln -s /opt/release/harbor-v1.9.4 /opt/apps/harbor
[root@hdss7-200 src]# ll /opt/apps/
total 0
lrwxrwxrwx 1 root root 26 Jan 5 11:13 harbor -> /opt/release/harbor-v1.9.4
# 实验环境仅修改以下配置项，生产环境还得修改密码
[root@hdss7-200 src]# vim /opt/apps/harbor/harbor.yml
hostname: harbor.
http:
port: 180
data_volume: /data/harbor
location: /data/harbor/logs
[root@hdss7-200 src]# yum install -y docker-compose
[root@hdss7-200 src]# cd /opt/apps/harbor/
[root@hdss7-200 harbor]# ./
......
✔ ----Harbor has been installed and started successfully.----
[root@hdss7-200 harbor]# docker-compose ps
Name Command State Ports
--------------------------------------------------------------------------------------
harbor-core /harbor/harbor_core Up
harbor-db /docker- Up 5432/tcp
harbor-jobservice /harbor/harbor_jobservice ... Up
harbor-log /bin/sh -c /usr/local/bin/ ... Up 127.0.0.1:1514->10514/tcp
harbor-portal nginx -g daemon off; Up 8080/tcp
nginx nginx -g daemon off; Up 0.0.0.0:180->8080/tcp
redis redis-server /etc/redis.conf Up 6379/tcp
registry / /etc/regist ... Up 5000/tcp
registryctl /harbor/start.sh Up- 设置harbor开机启动
# 增加以下内容 [root@hdss7-200 harbor]# cat>>/etc/rc.d/rc.local<<EOF # start harbor cd /opt/apps/harbor /usr/bin/docker-compose stop /usr/bin/docker-compose start EOF # 注意要给执行权限 chmod +x /etc/rc.d/rc.local
2.5.2. hdss7-200 安装nginx
- 安装Nginx反向代理harbor
# 当前机器中Nginx功能较少，使用yum安装即可。如有多个harbor考虑源码编译且配置健康检查
# nginx配置此处忽略，仅仅使用最简单的配置。
[root@hdss7-200 ~]# yum -y install nginx
[root@hdss7-200 harbor]# cat>>/etc/nginx/conf.d/harbor.conf<<EOF
server {
listen 80;
server_name harbor.;
# 避免出现上传失败的情况
client_max_body_size 1000m;
location / {
proxy_pass http://127.0.0.1:180;
}
}
EOF
[root@hdss7-200 harbor]# systemctl start nginx ; systemctl enable nginx- hdss7-11 配置DNS解析
# serial序列号需要滚动一个,根据日期编写的。只是一个数字而已 [root@hdss7-11 ~]# vim /var/named/.zone $ORIGIN . $TTL 600 ; 10 minutes @ IN SOA dns.. dnsadmin.. ( 2021043002 ; serial # 更改这个数字 10800 ; refresh (3 hours) 900 ; retry (15 minutes) 604800 ; expire (1 week) 86400 ; minimum (1 day) ) NS dns.. $TTL 60 ; 1 minute dns A 10.4.7.11 harbor A 10.4.7.200 [root@hdss7-11 ~]# systemctl restart named.service # reload 无法使得配置生效 [root@hdss7-11 ~]# host harbor. harbor. has address 10.4.7.200
- 新建项目: public
- 测试harbor
[root@hdss7-200 ~]# docker pull nginx:1.17.9 [root@hdss7-200 ~]# docker tag nginx:1.17.9 harbor./public/nginx:v1.17.9 [root@hdss7-200 ~]# docker login -u admin harbor. # 默认密码: Harbor12345 [root@hdss7-200 ~]# docker image push harbor./public/nginx:v1.17.9
3. 主控节点安装
3.1. etcd安装
etcd 的leader选举机制，要求至少为3台或以上的奇数台。本次安装涉及：hdss7-12，hdss7-21，hdss7-22
3.1.1. 签发etcd证书
证书签发服务器 hdss7-200:
创建ca的json配置: /opt/certs/ca-config.json
- server 表示服务端连接客户端时携带的证书，用于客户端验证服务端身份
- client 表示客户端连接服务端时携带的证书，用于服务端验证客户端身份
- peer 表示相互之间连接时使用的证书，如etcd节点之间验证
cat>>/opt/certs/ca-config.json<<EOF
{
"signing": {
"default": {
"expiry": "175200h"
},
"profiles": {
"server": {
"expiry": "175200h",
"usages": [
"signing",
"key encipherment",
"server auth"
]
},
"client": {
"expiry": "175200h",
"usages": [
"signing",
"key encipherment",
"client auth"
]
},
"peer": {
"expiry": "175200h",
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
]
}
}
}
}
EOF- 创建etcd证书配置：/opt/certs/etcd-peer-csr.json
重点在hosts上，将所有可能的etcd服务器添加到host列表，不能使用网段，新增etcd服务器需要重新签发证书
cat>>/opt/certs/etcd-peer-csr.json<<EOF
{
"CN": "k8s-etcd",
"hosts": [
"10.4.7.11",
"10.4.7.12",
"10.4.7.21",
"10.4.7.22"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
EOF- 签发证书
[root@hdss7-200 ~]# cd /opt/certs/ [root@hdss7-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=peer etcd-peer-csr.json |cfssl-json -bare etcd-peer [root@hdss7-200 certs]# ll etcd-peer* -rw-r--r-- 1 root root 1062 Jan 5 17:01 etcd-peer.csr -rw-r--r-- 1 root root 363 Jan 5 16:59 etcd-peer-csr.json -rw------- 1 root root 1675 Jan 5 17:01 etcd-peer-key.pem -rw-r--r-- 1 root root 1428 Jan 5 17:01 etcd-peer.pem
3.1.2. 安装etcd
etcd地址：https:///etcd-io/etcd/
实验使用版本: etcd-v3.1.20-linux-amd64.tar.gz
本次安装涉及：hdss7-12，hdss7-21，hdss7-22
- 下载etcd
[root@hdss7-12 ~]# useradd -s /sbin/nologin -M etcd [root@hdss7-12 ~]# cd /opt/src/ [root@hdss7-12 src]# wget https:///etcd-io/etcd/releases/download/v3.1.20/etcd-v3.1.20-linux-amd64.tar.gz [root@hdss7-12 src]# tar -xf etcd-v3.1.20-linux-amd64.tar.gz [root@hdss7-12 src]# mv etcd-v3.1.20-linux-amd64 /opt/release/etcd-v3.1.20 [root@hdss7-12 src]# ln -s /opt/release/etcd-v3.1.20 /opt/apps/etcd [root@hdss7-12 src]# ll /opt/apps/etcd lrwxrwxrwx 1 root root 25 Jan 5 17:56 /opt/apps/etcd -> /opt/release/etcd-v3.1.20 [root@hdss7-12 src]# mkdir -p /opt/apps/etcd/certs /data/etcd /data/logs/etcd-server
- 下发证书到各个etcd上
[root@hdss7-200 ~]# cd /opt/certs/
[root@hdss7-200 certs]# for i in 12 21 22;do scp ca.pem etcd-peer.pem etcd-peer-key.pem hdss7-${i}:/opt/apps/etcd/certs/ ;done[root@hdss7-12 src]# md5sum /opt/apps/etcd/certs/* 8778d0c3411891af61a287e49a70c89a /opt/apps/etcd/certs/ca.pem 7918783c2f6bf69e96edf03e67d04983 /opt/apps/etcd/certs/etcd-peer-key.pem d4d849751a834c7727d42324fdedf92d /opt/apps/etcd/certs/etcd-peer.pem
- 创建启动脚本(部分参数每台机器不同)
[root@hdss7-12 ~]# vim /opt/apps/etcd/ #!/bin/sh # listen-peer-urls etcd节点之间通信端口 # listen-client-urls 客户端与etcd通信端口 # quota-backend-bytes 配额大小 # 需要修改的参数：name,listen-peer-urls,listen-client-urls,initial-advertise-peer-urls WORK_DIR=$(dirname $(readlink -f $0)) [ $? -eq 0 ] && cd $WORK_DIR || exit /opt/apps/etcd/etcd --name etcd-server-7-12 \ --data-dir /data/etcd/etcd-server \ --listen-peer-urls https://10.4.7.12:2380 \ --listen-client-urls https://10.4.7.12:2379,http://127.0.0.1:2379 \ --quota-backend-bytes 8000000000 \ --initial-advertise-peer-urls https://10.4.7.12:2380 \ --advertise-client-urls https://10.4.7.12:2379,http://127.0.0.1:2379 \ --initial-cluster etcd-server-7-12=https://10.4.7.12:2380,etcd-server-7-21=https://10.4.7.21:2380,etcd-server-7-22=https://10.4.7.22:2380 \ --ca-file ./certs/ca.pem \ --cert-file ./certs/etcd-peer.pem \ --key-file ./certs/etcd-peer-key.pem \ --client-cert-auth \ --trusted-ca-file ./certs/ca.pem \ --peer-ca-file ./certs/ca.pem \ --peer-cert-file ./certs/etcd-peer.pem \ --peer-key-file ./certs/etcd-peer-key.pem \ --peer-client-cert-auth \ --peer-trusted-ca-file ./certs/ca.pem \ --log-output stdout
[root@hdss7-12 ~]# chmod u+x /opt/apps/etcd/ [root@hdss7-12 ~]# chown -R etcd.etcd /opt/apps/etcd/ /data/etcd /data/logs/etcd-server
3.1.3. 启动etcd
因为这些进程都是要启动为后台进程，要么手动启动，要么采用后台进程管理工具，实验中使用后台管理工具
[root@hdss7-12 ~]# yum install -y supervisor [root@hdss7-12 ~]# systemctl start supervisord ; systemctl enable supervisord [root@hdss7-12 ~]# vim /etc/supervisord.d/etcd-server.ini [program:etcd-server-7-12] command=/opt/apps/etcd/ numprocs=1 directory=/opt/apps/etcd autostart=true autorestart=true startsecs=30 startretries=3 exitcodes=0,2 stopsignal=QUIT stopwaitsecs=10 user=etcd redirect_stderr=true stdout_logfile=/data/logs/etcd-server/etcd.stdout.log stdout_logfile_maxbytes=64MB stdout_logfile_backups=5 stdout_capture_maxbytes=1MB stdout_events_enabled=false killasgroup=true stopasgroup=true [root@hdss7-12 ~]# mkdir /data/logs/etcd-server/ -p [root@hdss7-12 ~]# supervisorctl update etcd-server-7-12: added process group
- etcd 进程状态查看
[root@hdss7-12 ~]# supervisorctl status # supervisorctl 状态 etcd-server-7-12 RUNNING pid 22375, uptime 0:00:39 [root@hdss7-12 ~]# netstat -lntp|grep etcd tcp 0 0 10.4.7.12:2379 0.0.0.0:* LISTEN 22379/etcd tcp 0 0 127.0.0.1:2379 0.0.0.0:* LISTEN 22379/etcd tcp 0 0 10.4.7.12:2380 0.0.0.0:* LISTEN 22379/etcd [root@hdss7-12 ~]# /opt/apps/etcd/etcdctl member list # 随着etcd重启，leader会变化 988139385f78284: name=etcd-server-7-22 peerURLs=https://10.4.7.22:2380 clientURLs=http://127.0.0.1:2379,https://10.4.7.22:2379 isLeader=false 5a0ef2a004fc4349: name=etcd-server-7-21 peerURLs=https://10.4.7.21:2380 clientURLs=http://127.0.0.1:2379,https://10.4.7.21:2379 isLeader=true f4a0cb0a765574a8: name=etcd-server-7-12 peerURLs=https://10.4.7.12:2380 clientURLs=http://127.0.0.1:2379,https://10.4.7.12:2379 isLeader=false [root@hdss7-22 /opt/apps/etcd]# ./etcdctl cluster-health member 988139385f78284 is healthy: got healthy result from http://127.0.0.1:2379 member 5a0ef2a004fc4349 is healthy: got healthy result from http://127.0.0.1:2379 member f4a0cb0a765574a8 is healthy: got healthy result from http://127.0.0.1:2379 cluster is healthy
- etcd 启停方式
[root@hdss7-12 ~]# supervisorctl start etcd-server-7-12 [root@hdss7-12 ~]# supervisorctl stop etcd-server-7-12 [root@hdss7-12 ~]# supervisorctl restart etcd-server-7-12 [root@hdss7-12 ~]# supervisorctl status etcd-server-7-12
3.2. apiserver 安装
3.2.1. 下载kubernetes服务端
aipserver 涉及的服务器：hdss7-21，hdss7-22
下载 kubernetes 二进制版本包需要翻墙工具
- 进入kubernetes的github页面: https:///kubernetes/kubernetes
- 进入tags页签: https:///kubernetes/kubernetes/tags
- 选择要下载的版本: https:///kubernetes/kubernetes/releases/tag/v1.15.2
- 点击 CHANGELOG-${version}.md 进入说明页面: https:///kubernetes/kubernetes/blob/master/#downloads-for-v1152
- 下载Server Binaries: https://dl.k8s.io/v1.15.2/kubernetes-server-linux-amd64.tar.gz
[root@hdss7-21 ~]# cd /opt/src [root@hdss7-21 src]# wget https://dl.k8s.io/v1.15.2/kubernetes-server-linux-amd64.tar.gz [root@hdss7-21 src]# tar -xf kubernetes-server-linux-amd64.tar.gz [root@hdss7-21 src]# mv kubernetes /opt/release/kubernetes-v1.15.2 [root@hdss7-21 src]# ln -s /opt/release/kubernetes-v1.15.2 /opt/apps/kubernetes [root@hdss7-21 src]# ll /opt/apps/kubernetes lrwxrwxrwx 1 root root 31 Jan 6 12:59 /opt/apps/kubernetes -> /opt/release/kubernetes-v1.15.2 [root@hdss7-21 src]# cd /opt/apps/kubernetes [root@hdss7-21 kubernetes]# rm -f kubernetes-src.tar.gz [root@hdss7-21 kubernetes]# cd server/bin/ [root@hdss7-21 bin]# rm -f *.tar *_tag # *.tar *_tag 镜像文件 [root@hdss7-21 bin]# ll total 884636 -rwxr-xr-x 1 root root 43534816 Aug 5 18:01 apiextensions-apiserver -rwxr-xr-x 1 root root 100548640 Aug 5 18:01 cloud-controller-manager -rwxr-xr-x 1 root root 200648416 Aug 5 18:01 hyperkube -rwxr-xr-x 1 root root 40182208 Aug 5 18:01 kubeadm -rwxr-xr-x 1 root root 164501920 Aug 5 18:01 kube-apiserver -rwxr-xr-x 1 root root 116397088 Aug 5 18:01 kube-controller-manager -rwxr-xr-x 1 root root 42985504 Aug 5 18:01 kubectl -rwxr-xr-x 1 root root 119616640 Aug 5 18:01 kubelet -rwxr-xr-x 1 root root 36987488 Aug 5 18:01 kube-proxy -rwxr-xr-x 1 root root 38786144 Aug 5 18:01 kube-scheduler -rwxr-xr-x 1 root root 1648224 Aug 5 18:01 mounter
3.2.2. 签发证书
签发证书 涉及的服务器：hdss7-200
- 签发client证书（apiserver和etcd通信证书）
[root@hdss7-200 ~]# cd /opt/certs/
[root@hdss7-200 certs]# cat>>/opt/certs/client-csr.json<<EOF
{
"CN": "k8s-node",
"hosts": [
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
EOF
[root@hdss7-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client client-csr.json |cfssl-json -bare client
2020/01/06 13:42:47 [INFO] generate received request
2020/01/06 13:42:47 [INFO] received CSR
2020/01/06 13:42:47 [INFO] generating key: rsa-2048
2020/01/06 13:42:47 [INFO] encoded CSR
2020/01/06 13:42:47 [INFO] signed certificate with serial number 268276380983442021656020268926931973684313260543
2020/01/06 13:42:47 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@hdss7-200 certs]# ls client* -l
-rw-r--r-- 1 root root 993 Jan 6 13:42 client.csr
-rw-r--r-- 1 root root 280 Jan 6 13:42 client-csr.json
-rw------- 1 root root 1679 Jan 6 13:42 client-key.pem
-rw-r--r-- 1 root root 1363 Jan 6 13:42 client.pem- 签发server证书（apiserver和其它k8s组件通信使用）
# hosts中将所有可能作为apiserver的ip添加进去，VIP 10.4.7.10 也要加入
[root@hdss7-200 certs]# cat>>/opt/certs/apiserver-csr.json<<EOF
{
"CN": "k8s-apiserver",
"hosts": [
"127.0.0.1",
"192.168.0.1",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.cluster",
"kubernetes.default.svc.cluster.local",
"10.4.7.10",
"10.4.7.21",
"10.4.7.22",
"10.4.7.23"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
EOF
[root@hdss7-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server apiserver-csr.json |cfssl-json -bare apiserver
2020/01/06 13:46:56 [INFO] generate received request
2020/01/06 13:46:56 [INFO] received CSR
2020/01/06 13:46:56 [INFO] generating key: rsa-2048
2020/01/06 13:46:56 [INFO] encoded CSR
2020/01/06 13:46:56 [INFO] signed certificate with serial number 573076691386375893093727554861295529219004473872
2020/01/06 13:46:56 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@hdss7-200 certs]# ls apiserver* -l
-rw-r--r-- 1 root root 1249 Jan 6 13:46 apiserver.csr
-rw-r--r-- 1 root root 566 Jan 6 13:45 apiserver-csr.json
-rw------- 1 root root 1675 Jan 6 13:46 apiserver-key.pem
-rw-r--r-- 1 root root 1598 Jan 6 13:46 apiserver.pem- 证书下发
[root@hdss7-200 certs]# for i in 21 22;do echo hdss7-$i;ssh hdss7-$i "mkdir /opt/apps/kubernetes/server/bin/certs";scp apiserver-key.pem apiserver.pem ca-key.pem ca.pem client-key.pem client.pem hdss7-$i:/opt/apps/kubernetes/server/bin/certs/;done
3.2.3. 配置apiserver日志审计
aipserver 涉及的服务器：hdss7-21，hdss7-22
[root@hdss7-21 bin]# mkdir /opt/apps/kubernetes/conf # 打开文件后，设置 :set paste，避免自动缩进 [root@hdss7-21 bin]# \vi /opt/apps/kubernetes/conf/audit.yaml apiVersion: /v1beta1 # This is required. kind: Policy # Don't generate audit events for all requests in RequestReceived stage. omitStages: - "RequestReceived" rules: # Log pod changes at RequestResponse level - level: RequestResponse resources: - group: "" # Resource "pods" doesn't match requests to any subresource of pods, # which is consistent with the RBAC policy. resources: ["pods"] # Log "pods/log", "pods/status" at Metadata level - level: Metadata resources: - group: "" resources: ["pods/log", "pods/status"] # Don't log requests to a configmap called "controller-leader" - level: None resources: - group: "" resources: ["configmaps"] resourceNames: ["controller-leader"] # Don't log watch requests by the "system:kube-proxy" on endpoints or services - level: None users: ["system:kube-proxy"] verbs: ["watch"] resources: - group: "" # core API group resources: ["endpoints", "services"] # Don't log authenticated requests to certain non-resource URL paths. - level: None userGroups: ["system:authenticated"] nonResourceURLs: - "/api*" # Wildcard matching. - "/version" # Log the request body of configmap changes in kube-system. - level: Request resources: - group: "" # core API group resources: ["configmaps"] # This rule only applies to resources in the "kube-system" namespace. # The empty string "" can be used to select non-namespaced resources. namespaces: ["kube-system"] # Log configmap and secret changes in all other namespaces at the Metadata level. - level: Metadata resources: - group: "" # core API group resources: ["secrets", "configmaps"] # Log all other resources in core and extensions at the Request level. - level: Request resources: - group: "" # core API group - group: "extensions" # Version of group should NOT be included. # A catch-all rule to log all other requests at the Metadata level. - level: Metadata # Long-running requests like watches that fall under this rule will not # generate an audit event in RequestReceived. omitStages: - "RequestReceived"
3.2.4. 配置启动脚本
aipserver 涉及的服务器：hdss7-21，hdss7-22
- 创建启动脚本
[root@hdss7-21 bin]# vim /opt/apps/kubernetes/server/bin/ #!/bin/bash WORK_DIR=$(dirname $(readlink -f $0)) [ $? -eq 0 ] && cd $WORK_DIR || exit /opt/apps/kubernetes/server/bin/kube-apiserver \ --apiserver-count 2 \ --audit-log-path /data/logs/kubernetes/kube-apiserver/audit-log \ --audit-policy-file ../../conf/audit.yaml \ --authorization-mode RBAC \ --client-ca-file ./certs/ca.pem \ --requestheader-client-ca-file ./certs/ca.pem \ --enable-admission-plugins NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota \ --etcd-cafile ./certs/ca.pem \ --etcd-certfile ./certs/client.pem \ --etcd-keyfile ./certs/client-key.pem \ --etcd-servers https://10.4.7.12:2379,https://10.4.7.21:2379,https://10.4.7.22:2379 \ --service-account-key-file ./certs/ca-key.pem \ --service-cluster-ip-range 192.168.0.0/16 \ --service-node-port-range 3000-29999 \ --target-ram-mb=1024 \ --kubelet-client-certificate ./certs/client.pem \ --kubelet-client-key ./certs/client-key.pem \ --log-dir /data/logs/kubernetes/kube-apiserver \ --tls-cert-file ./certs/apiserver.pem \ --tls-private-key-file ./certs/apiserver-key.pem \ --v 2 # 添加可执行权限 chmod +x /opt/release/kubernetes-v1.15.2/server/bin/
- 配置supervisor启动配置
[root@hdss7-21 bin]# vim /etc/supervisord.d/kube-apiserver.ini [program:kube-apiserver-7-21] command=/opt/apps/kubernetes/server/bin/ numprocs=1 directory=/opt/apps/kubernetes/server/bin autostart=true autorestart=true startsecs=30 startretries=3 exitcodes=0,2 stopsignal=QUIT stopwaitsecs=10 user=root redirect_stderr=true stdout_logfile=/data/logs/kubernetes/kube-apiserver/apiserver.stdout.log stdout_logfile_maxbytes=64MB stdout_logfile_backups=5 stdout_capture_maxbytes=1MB stdout_events_enabled=false killasgroup=true stopasgroup=true [root@hdss7-21 bin]# mkdir /data/logs/kubernetes/kube-apiserver/ -p [root@hdss7-21 bin]# supervisorctl update [root@hdss7-21 bin]# supervisorctl status etcd-server-7-21 RUNNING pid 23637, uptime 22:26:08 kube-apiserver-7-21 RUNNING pid 32591, uptime 0:05:37
- 启停apiserver
[root@hdss7-12 ~]# supervisorctl start kube-apiserver-7-21 [root@hdss7-12 ~]# supervisorctl stop kube-apiserver-7-21 [root@hdss7-12 ~]# supervisorctl restart kube-apiserver-7-21 [root@hdss7-12 ~]# supervisorctl status kube-apiserver-7-21
- 查看进程
[root@hdss7-21 bin]# netstat -lntp|grep api tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN 32595/kube-apiserve tcp6 0 0 :::6443 :::* LISTEN 32595/kube-apiserve [root@hdss7-21 bin]# ps uax|grep kube-apiserver|grep -v grep root 32591 0.0 0.0 115296 1476 ? S 20:17 0:00 /bin/bash /opt/apps/kubernetes/server/bin/ root 32595 3.0 2.3 402720 184892 ? Sl 20:17 0:16 /opt/apps/kubernetes/server/bin/kube-apiserver --apiserver-count 2 --audit-log-path /data/logs/kubernetes/kube-apiserver/audit-log --audit-policy-file ../../conf/audit.yaml --authorization-mode RBAC --client-ca-file ./certs/ca.pem --requestheader-client-ca-file ./certs/ca.pem --enable-admission-plugins NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota --etcd-cafile ./certs/ca.pem --etcd-certfile ./certs/client.pem --etcd-keyfile ./certs/client-key.pem --etcd-servers https://10.4.7.12:2379,https://10.4.7.21:2379,https://10.4.7.22:2379 --service-account-key-file ./certs/ca-key.pem --service-cluster-ip-range 192.168.0.0/16 --service-node-port-range 3000-29999 --target-ram-mb=1024 --kubelet-client-certificate ./certs/client.pem --kubelet-client-key ./certs/client-key.pem --log-dir /data/logs/kubernetes/kube-apiserver --tls-cert-file ./certs/apiserver.pem --tls-private-key-file ./certs/apiserver-key.pem --v 2
3.3. 配置apiserver L4代理
3.3.1. nginx配置
L4 代理涉及的服务器：hdss7-11，hdss7-12
[root@hdss7-11 ~]# yum install -y nginx
[root@hdss7-11 ~]# vim /etc/nginx/nginx.conf
# 末尾加上以下内容，stream 只能加在 main 中
# 此处只是简单配置下nginx，实际生产中，建议进行更合理的配置
stream {
log_format proxy '$time_local|$remote_addr|$upstream_addr|$protocol|$status|'
'$session_time|$upstream_connect_time|$bytes_sent|$bytes_received|'
'$upstream_bytes_sent|$upstream_bytes_received' ;
upstream kube-apiserver {
server 10.4.7.21:6443 max_fails=3 fail_timeout=30s;
server 10.4.7.22:6443 max_fails=3 fail_timeout=30s;
}
server {
listen 7443;
proxy_connect_timeout 2s;
proxy_timeout 900s;
proxy_pass kube-apiserver;
access_log /var/log/nginx/proxy.log proxy;
}
}
[root@hdss7-11 ~]# systemctl start nginx; systemctl enable nginx
[root@hdss7-11 ~]# curl 127.0.0.1:7443 # 测试几次
Client sent an HTTP request to an HTTPS server.
[root@hdss7-11 ~]# cat /var/log/nginx/proxy.log
06/Jan/2020:21:00:27 +0800|127.0.0.1|10.4.7.21:6443|TCP|200|0.001|0.000|76|78|78|76
06/Jan/2020:21:05:03 +0800|127.0.0.1|10.4.7.22:6443|TCP|200|0.020|0.019|76|78|78|76
06/Jan/2020:21:05:04 +0800|127.0.0.1|10.4.7.21:6443|TCP|200|0.001|0.001|76|78|78|763.3.2. keepalived配置
aipserver L4 代理涉及的服务器：hdss7-11，hdss7-12
- 安装keepalive
[root@hdss7-11 ~]# yum install -y keepalived [root@hdss7-11 ~]# vim /etc/keepalived/check_port.sh # 配置检查脚本 #!/bin/bash if [ $# -eq 1 ] && [[ $1 =~ ^[0-9]+ ]];then [ $(netstat -lntp|grep ":$1 " |wc -l) -eq 0 ] && echo "[ERROR] nginx may be not running!" && exit 1 || exit 0 else echo "[ERROR] need one port!" exit 1 fi [root@hdss7-11 ~]# chmod +x /etc/keepalived/check_port.sh
- 配置主节点：/etc/keepalived/keepalived.conf
主节点中，必须加上 nopreempt
因为一旦因为网络抖动导致VIP漂移，不能让它自动飘回来，必须要分析原因后手动迁移VIP到主节点！如主节点确认正常后，重启备节点的keepalive，让VIP飘到主节点.
keepalived 的日志输出配置此处省略，生产中需要进行处理。
vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id 10.4.7.11
}
vrrp_script chk_nginx {
script "/etc/keepalived/check_port.sh 7443"
interval 2
weight -20
}
vrrp_instance VI_1 {
state MASTER
interface ens32
virtual_router_id 251
priority 100
advert_int 1
mcast_src_ip 10.4.7.11
nopreempt
authentication {
auth_type PASS
auth_pass 11111111
}
track_script {
chk_nginx
}
virtual_ipaddress {
10.4.7.10
}
}配置备节点：/etc/keepalived/keepalived.conf
注意根据实际的网卡名称更改网卡名配置。
vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id 10.4.7.12
}
vrrp_script chk_nginx {
script "/etc/keepalived/check_port.sh 7443"
interval 2
weight -20
}
vrrp_instance VI_1 {
state BACKUP
interface ens32
virtual_router_id 251
mcast_src_ip 10.4.7.12
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 11111111
}
track_script {
chk_nginx
}
virtual_ipaddress {
10.4.7.10
}
}- 启动keepalived
[root@hdss7-11 ~]# systemctl start keepalived ; systemctl enable keepalived [root@hdss7-11 ~]# ip addr show ens32 2: ens32:mtu 1500 qdisc pfifo_fast state UP group default qlen 1000 link/ether 00:0c:29:6d:b8:82 brd ff:ff:ff:ff:ff:ff inet 10.4.7.11/24 brd 10.4.7.255 scope global noprefixroute ens32 valid_lft forever preferred_lft forever inet 10.4.7.10/32 scope global ens32 valid_lft forever preferred_lft forever ......
3.4. controller-manager 安装
controller-manager 涉及的服务器：hdss7-21，hdss7-22
controller-manager 设置为只调用当前机器的 apiserver，走127.0.0.1网卡，因此不配制SSL证书
[root@hdss7-21 ~]# vim /opt/apps/kubernetes/server/bin/ #!/bin/sh WORK_DIR=$(dirname $(readlink -f $0)) [ $? -eq 0 ] && cd $WORK_DIR || exit /opt/apps/kubernetes/server/bin/kube-controller-manager \ --cluster-cidr 172.7.0.0/16 \ --leader-elect true \ --log-dir /data/logs/kubernetes/kube-controller-manager \ --master http://127.0.0.1:8080 \ --service-account-private-key-file ./certs/ca-key.pem \ --service-cluster-ip-range 192.168.0.0/16 \ --root-ca-file ./certs/ca.pem \ --v 2 [root@hdss7-21 ~]# chmod u+x /opt/apps/kubernetes/server/bin/
[root@hdss7-21 ~]# vim /etc/supervisord.d/kube-controller-manager.ini [program:kube-controller-manager-7-21] command=/opt/apps/kubernetes/server/bin/ numprocs=1 directory=/opt/apps/kubernetes/server/bin autostart=true autorestart=true startsecs=30 startretries=3 exitcodes=0,2 stopsignal=QUIT stopwaitsecs=10 user=root redirect_stderr=true stdout_logfile=/data/logs/kubernetes/kube-controller-manager/controller.stdout.log stdout_logfile_maxbytes=64MB stdout_logfile_backups=4 stdout_capture_maxbytes=1MB stdout_events_enabled=false killasgroup=true stopasgroup=true
[root@hdss7-21 ~]# mkdir /data/logs/kubernetes/kube-controller-manager [root@hdss7-21 ~]# supervisorctl update kube-controller-manager-7-21: stopped kube-controller-manager-7-21: updated process group [root@hdss7-21 ~]# supervisorctl status etcd-server-7-21 RUNNING pid 23637, uptime 1 day, 0:16:54 kube-apiserver-7-21 RUNNING pid 32591, uptime 1:56:23 kube-controller-manager-7-21 RUNNING pid 33357, uptime 0:00:38
3.5. kube-scheduler安装
kube-scheduler 涉及的服务器：hdss7-21，hdss7-22
kube-scheduler 设置为只调用当前机器的 apiserver，走127.0.0.1网卡，因此不配制SSL证书
[root@hdss7-21 ~]# vim /opt/apps/kubernetes/server/bin/ #!/bin/sh WORK_DIR=$(dirname $(readlink -f $0)) [ $? -eq 0 ] && cd $WORK_DIR || exit /opt/apps/kubernetes/server/bin/kube-scheduler \ --leader-elect \ --log-dir /data/logs/kubernetes/kube-scheduler \ --master http://127.0.0.1:8080 \ --v 2 [root@hdss7-21 ~]# chmod u+x /opt/apps/kubernetes/server/bin/ [root@hdss7-21 ~]# mkdir -p /data/logs/kubernetes/kube-scheduler
[root@hdss7-21 ~]# vim /etc/supervisord.d/kube-scheduler.ini [program:kube-scheduler-7-21] command=/opt/apps/kubernetes/server/bin/ numprocs=1 directory=/opt/apps/kubernetes/server/bin autostart=true autorestart=true startsecs=30 startretries=3 exitcodes=0,2 stopsignal=QUIT stopwaitsecs=10 user=root redirect_stderr=true stdout_logfile=/data/logs/kubernetes/kube-scheduler/scheduler.stdout.log stdout_logfile_maxbytes=64MB stdout_logfile_backups=4 stdout_capture_maxbytes=1MB stdout_events_enabled=false killasgroup=true stopasgroup=true
[root@hdss7-21 ~]# supervisorctl update kube-scheduler-7-21: stopped kube-scheduler-7-21: updated process group [root@hdss7-21 ~]# supervisorctl status etcd-server-7-21 RUNNING pid 23637, uptime 1 day, 0:26:53 kube-apiserver-7-21 RUNNING pid 32591, uptime 2:06:22 kube-controller-manager-7-21 RUNNING pid 33357, uptime 0:10:37 kube-scheduler-7-21 RUNNING pid 33450, uptime 0:01:18
3.6. 检查主控节点状态
[root@hdss7-21 ~]# ln -s /opt/apps/kubernetes/server/bin/kubectl /usr/local/bin/
[root@hdss7-21 ~]# kubectl get cs
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-1 Healthy {"health": "true"}
etcd-0 Healthy {"health": "true"}
etcd-2 Healthy {"health": "true"}[root@hdss7-22 ~]# ln -s /opt/apps/kubernetes/server/bin/kubectl /usr/local/bin/
[root@hdss7-22 ~]# kubectl get cs
NAME STATUS MESSAGE ERROR
controller-manager Healthy ok
scheduler Healthy ok
etcd-2 Healthy {"health": "true"}
etcd-1 Healthy {"health": "true"}
etcd-0 Healthy {"health": "true"}4. 运算节点部署
4.1. kubelet 部署
4.1.1. 签发证书
证书签发在 hdss7-200 操作
[root@hdss7-200 ~]# cd /opt/certs/
[root@hdss7-200 certs]# vim kubelet-csr.json # 将所有可能的kubelet机器IP添加到hosts中
{
"CN": "k8s-kubelet",
"hosts": [
"127.0.0.1",
"10.4.7.10",
"10.4.7.21",
"10.4.7.22",
"10.4.7.23",
"10.4.7.24",
"10.4.7.25",
"10.4.7.26",
"10.4.7.27",
"10.4.7.28"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
[root@hdss7-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server kubelet-csr.json | cfssl-json -bare kubelet
2020/01/06 23:10:56 [INFO] generate received request
2020/01/06 23:10:56 [INFO] received CSR
2020/01/06 23:10:56 [INFO] generating key: rsa-2048
2020/01/06 23:10:56 [INFO] encoded CSR
2020/01/06 23:10:56 [INFO] signed certificate with serial number 61221942784856969738771370531559555767101820379
2020/01/06 23:10:56 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").
[root@hdss7-200 certs]# ls kubelet* -l
-rw-r--r-- 1 root root 1115 Jan 6 23:10 kubelet.csr
-rw-r--r-- 1 root root 452 Jan 6 23:10 kubelet-csr.json
-rw------- 1 root root 1675 Jan 6 23:10 kubelet-key.pem
-rw-r--r-- 1 root root 1468 Jan 6 23:10 kubelet.pem
[root@hdss7-200 certs]# for i in 21 22;do scp kubelet.pem kubelet-key.pem hdss7-$i:/opt/apps/kubernetes/server/bin/certs/;done4.1.2. 创建kubelet配置
kubelet配置在 hdss7-21 hdss7-22 操作
- set-cluster # 创建需要连接的集群信息，可以创建多个k8s集群信息
[root@hdss7-21 ~]# kubectl config set-cluster myk8s \ --certificate-authority=/opt/apps/kubernetes/server/bin/certs/ca.pem \ --embed-certs=true \ --server=https://10.4.7.10:7443 \ --kubeconfig=/opt/apps/kubernetes/conf/kubelet.kubeconfig
- set-credentials # 创建用户账号，即用户登陆使用的客户端私有和证书，可以创建多个证书
[root@hdss7-21 ~]# kubectl config set-credentials k8s-node \ --client-certificate=/opt/apps/kubernetes/server/bin/certs/client.pem \ --client-key=/opt/apps/kubernetes/server/bin/certs/client-key.pem \ --embed-certs=true \ --kubeconfig=/opt/apps/kubernetes/conf/kubelet.kubeconfig
- set-context # 设置context，即确定账号和集群对应关系
[root@hdss7-21 ~]# kubectl config set-context myk8s-context \ --cluster=myk8s \ --user=k8s-node \ --kubeconfig=/opt/apps/kubernetes/conf/kubelet.kubeconfig
- use-context # 设置当前使用哪个context
[root@hdss7-21 ~]# kubectl config use-context myk8s-context --kubeconfig=/opt/apps/kubernetes/conf/kubelet.kubeconfig
4.1.3. 授权k8s-node用户
此步骤只需要在一台master节点执行
授权 k8s-node 用户绑定集群角色 system:node ，让 k8s-node 成为具备运算节点的权限。
[root@hdss7-21 ~]# vim k8s-node.yaml apiVersion: /v1 kind: ClusterRoleBinding metadata: name: k8s-node roleRef: apiGroup: kind: ClusterRole name: system:node subjects: - apiGroup: kind: User name: k8s-node [root@hdss7-21 ~]# kubectl create -f k8s-node.yaml clusterrolebinding./k8s-node created [root@hdss7-21 ~]# kubectl get clusterrolebinding k8s-node NAME AGE k8s-node 36s
4.1.4. 装备pause镜像
将pause镜像放入到harbor私有仓库中，仅在 hdss7-200 操作：
[root@hdss7-200 ~]# docker image pull kubernetes/pause [root@hdss7-200 ~]# docker image tag kubernetes/pause:latest harbor./public/pause:latest [root@hdss7-200 ~]# docker login -u admin harbor. [root@hdss7-200 ~]# docker image push harbor./public/pause:latest
4.1.5. 创建启动脚本
在node节点创建脚本并启动kubelet，涉及服务器： hdss7-21 hdss7-22
[root@hdss7-21 ~]# vim /opt/apps/kubernetes/server/bin/ #!/bin/sh # 注意修改主机名 WORK_DIR=$(dirname $(readlink -f $0)) [ $? -eq 0 ] && cd $WORK_DIR || exit /opt/apps/kubernetes/server/bin/kubelet \ --anonymous-auth=false \ --cgroup-driver systemd \ --cluster-dns 192.168.0.2 \ --cluster-domain cluster.local \ --runtime-cgroups=/systemd/system.slice \ --kubelet-cgroups=/systemd/system.slice \ --fail-swap-on="false" \ --client-ca-file ./certs/ca.pem \ --tls-cert-file ./certs/kubelet.pem \ --tls-private-key-file ./certs/kubelet-key.pem \ --hostname-override \ --image-gc-high-threshold 20 \ --image-gc-low-threshold 10 \ --kubeconfig ../../conf/kubelet.kubeconfig \ --log-dir /data/logs/kubernetes/kube-kubelet \ --pod-infra-container-image harbor./public/pause:latest \ --root-dir /data/kubelet [root@hdss7-21 ~]# chmod u+x /opt/apps/kubernetes/server/bin/ [root@hdss7-21 ~]# mkdir -p /data/logs/kubernetes/kube-kubelet /data/kubelet [root@hdss7-21 ~]# vim /etc/supervisord.d/kube-kubelet.ini [program:kube-kubelet-7-21] command=/opt/apps/kubernetes/server/bin/ numprocs=1 directory=/opt/apps/kubernetes/server/bin autostart=true autorestart=true startsecs=30 startretries=3 exitcodes=0,2 stopsignal=QUIT stopwaitsecs=10 user=root redirect_stderr=true stdout_logfile=/data/logs/kubernetes/kube-kubelet/kubelet.stdout.log stdout_logfile_maxbytes=64MB stdout_logfile_backups=5 stdout_capture_maxbytes=1MB stdout_events_enabled=false killasgroup=true stopasgroup=true
[root@hdss7-21 ~]# supervisorctl update [root@hdss7-21 ~]# supervisorctl status etcd-server-7-21 RUNNING pid 23637, uptime 1 day, 14:56:25 kube-apiserver-7-21 RUNNING pid 32591, uptime 16:35:54 kube-controller-manager-7-21 RUNNING pid 33357, uptime 14:40:09 kube-kubelet-7-21 RUNNING pid 37232, uptime 0:01:08 kube-scheduler-7-21 RUNNING pid 33450, uptime 14:30:50 [root@hdss7-21 ~]# kubectl get node NAME STATUS ROLES AGE VERSION Ready3m13s v1.15.2 Ready3m13s v1.15.2
4.1.6. 修改节点角色
使用 kubectl get nodes 获取的Node节点角色为空，可以按照以下方式修改,这个操作只是在节点上面打了个标签。
[root@hdss7-21 ~]# kubectl get node NAME STATUS ROLES AGE VERSION Ready3m13s v1.15.2 Ready3m13s v1.15.2 [root@hdss7-21 ~]# kubectl label node /node= node/ labeled [root@hdss7-21 ~]# kubectl label node /master= node/ labeled [root@hdss7-21 ~]# kubectl label node /master= node/ labeled [root@hdss7-21 ~]# kubectl label node /node= node/ labeled [root@hdss7-21 ~]# kubectl get node NAME STATUS ROLES AGE VERSION Ready master,node 7m44s v1.15.2 Ready master,node 7m44s v1.15.2
4.2. kube-proxy部署
4.2.1. 签发证书
证书签发在 hdss7-200 操作
[root@hdss7-200 ~]# cd /opt/certs/
# CN 其实是k8s中的角色
[root@hdss7-200 certs]# cat>>kube-proxy-csr.json<<EOF
{
"CN": "system:kube-proxy",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
EOF
[root@hdss7-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client kube-proxy-csr.json |cfssl-json -bare kube-proxy-client
2020/01/07 21:45:53 [INFO] generate received request
2020/01/07 21:45:53 [INFO] received CSR
2020/01/07 21:45:53 [INFO] generating key: rsa-2048
2020/01/07 21:45:53 [INFO] encoded CSR
2020/01/07 21:45:53 [INFO] signed certificate with serial number 620191685968917036075463174423999296907693104226
2020/01/07 21:45:53 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
# 因为kube-proxy使用的用户是kube-proxy，不能使用client证书，必须要重新签发自己的证书
[root@hdss7-200 certs]# ls kube-proxy-c* -l
-rw-r--r-- 1 root root 1005 Jan 7 21:45 kube-proxy-client.csr
-rw------- 1 root root 1675 Jan 7 21:45 kube-proxy-client-key.pem
-rw-r--r-- 1 root root 1375 Jan 7 21:45 kube-proxy-client.pem
-rw-r--r-- 1 root root 267 Jan 7 21:45 kube-proxy-csr.json
[root@hdss7-200 certs]# scp kube-proxy-client-key.pem kube-proxy-client.pem hdss7-21:/opt/apps/kubernetes/server/bin/certs/ 100% 1375 870.6KB/s 00:00
[root@hdss7-200 certs]# scp kube-proxy-client-key.pem kube-proxy-client.pem hdss7-22:/opt/apps/kubernetes/server/bin/certs/
for i in 21 22;do scp kube-proxy-client-key.pem kube-proxy-client.pem hdss7-$i:/opt/apps/kubernetes/server/bin/certs/;done4.2.2. 创建kube-proxy配置
在所有node节点创建，涉及服务器：hdss7-21 ，hdss7-22
[root@hdss7-21 ~]# kubectl config set-cluster myk8s \ --certificate-authority=/opt/apps/kubernetes/server/bin/certs/ca.pem \ --embed-certs=true \ --server=https://10.4.7.10:7443 \ --kubeconfig=/opt/apps/kubernetes/conf/kube-proxy.kubeconfig [root@hdss7-21 ~]# kubectl config set-credentials kube-proxy \ --client-certificate=/opt/apps/kubernetes/server/bin/certs/kube-proxy-client.pem \ --client-key=/opt/apps/kubernetes/server/bin/certs/kube-proxy-client-key.pem \ --embed-certs=true \ --kubeconfig=/opt/apps/kubernetes/conf/kube-proxy.kubeconfig [root@hdss7-21 ~]# kubectl config set-context myk8s-context \ --cluster=myk8s \ --user=kube-proxy \ --kubeconfig=/opt/apps/kubernetes/conf/kube-proxy.kubeconfig [root@hdss7-21 ~]# kubectl config use-context myk8s-context --kubeconfig=/opt/apps/kubernetes/conf/kube-proxy.kubeconfig
4.2.3. 加载ipvs模块
kube-proxy 共有3种流量调度模式，分别是 namespace，iptables，ipvs，其中ipvs性能最好。
[root@hdss7-21 ~]# for i in $(ls /usr/lib/modules/$(uname -r)/kernel/net/netfilter/ipvs|grep -o "^[^.]*");do echo $i; /sbin/modinfo -F filename $i >/dev/null 2>&1 && /sbin/modprobe $i;done [root@hdss7-21 ~]# lsmod | grep ip_vs # 查看ipvs模块
4.2.4. 创建启动脚本
# 注意更改主机名 [root@hdss7-21 ~]# vim /opt/apps/kubernetes/server/bin/ #!/bin/sh WORK_DIR=$(dirname $(readlink -f $0)) [ $? -eq 0 ] && cd $WORK_DIR || exit /opt/apps/kubernetes/server/bin/kube-proxy \ --cluster-cidr 172.7.0.0/16 \ --hostname-override \ --proxy-mode=ipvs \ --ipvs-scheduler=nq \ --kubeconfig ../../conf/kube-proxy.kubeconfig [root@hdss7-21 ~]# chmod u+x /opt/apps/kubernetes/server/bin/ [root@hdss7-21 ~]# mkdir -p /data/logs/kubernetes/kube-proxy [root@hdss7-21 ~]# vim /etc/supervisord.d/kube-proxy.ini [program:kube-proxy-7-21] command=/opt/apps/kubernetes/server/bin/ numprocs=1 directory=/opt/apps/kubernetes/server/bin autostart=true autorestart=true startsecs=30 startretries=3 exitcodes=0,2 stopsignal=QUIT stopwaitsecs=10 user=root redirect_stderr=true stdout_logfile=/data/logs/kubernetes/kube-proxy/proxy.stdout.log stdout_logfile_maxbytes=64MB stdout_logfile_backups=5 stdout_capture_maxbytes=1MB stdout_events_enabled=false killasgroup=true stopasgroup=true [root@hdss7-21 ~]# supervisorctl update
4.2.5. 验证集群
[root@hdss7-21 ~]# supervisorctl status etcd-server-7-21 RUNNING pid 23637, uptime 2 days, 0:27:18 kube-apiserver-7-21 RUNNING pid 32591, uptime 1 day, 2:06:47 kube-controller-manager-7-21 RUNNING pid 33357, uptime 1 day, 0:11:02 kube-kubelet-7-21 RUNNING pid 37232, uptime 9:32:01 kube-proxy-7-21 RUNNING pid 47088, uptime 0:06:19 kube-scheduler-7-21 RUNNING pid 33450, uptime 1 day, 0:01:43 [root@hdss7-21 ~]# yum install -y ipvsadm [root@hdss7-21 ~]# ipvsadm -Ln IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port Forward Weight ActiveConn InActConn TCP 192.168.0.1:443 nq -> 10.4.7.21:6443 Masq 1 0 0 -> 10.4.7.22:6443 Masq 1 0 0
cat >/root/nginx-ds.yaml <<'EOF' apiVersion: extensions/v1beta1 kind: DaemonSet metadata: name: nginx-ds spec: template: metadata: labels: app: nginx-ds spec: containers: - name: my-nginx image: harbor./public/nginx:v1.17.9 ports: - containerPort: 80 EOF [root@hdss7-21 ~]# kubectl apply -f nginx-ds.yaml [root@hdss7-21 ~]# kubectl get pods -o wide NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES nginx-ds-cfc8d 1/1 Running 0 64s 172.7.22.2 nginx-ds-vd4mk 1/1 Running 0 64s 172.7.21.2
[root@hdss7-21 ~]# curl -I 172.7.21.2 HTTP/1.1 200 OK Server: nginx/1.17.6 Date: Tue, 07 Jan 2020 14:28:46 GMT Content-Type: text/html Content-Length: 612 Last-Modified: Tue, 19 Nov 2019 12:50:08 GMT Connection: keep-alive ETag: "5dd3e500-264" Accept-Ranges: bytes [root@hdss7-21 ~]# curl -I 172.7.22.2 # 缺少网络插件，无法跨节点通信
