Docker&K8s---跟我一步步部署K8s(二进制安装部署)
文章目录Docker&K8s---跟我一步步部署K8s(二进制安装部署)Kubernetes(K8s)概述Kubernetes快速入门四组基本概念常见的K8s安装部署方式准备工作bind9部署dnsnamed区域配置文件准备证书签发环境下载工具部署私有镜像仓库harbor安装docker12-200安装harbor12-11上配置DNS解析浏览器访问向harbor推送nginx镜像K8s部
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文章目录
Docker&K8s—跟我一步步部署K8s(二进制安装部署)
Docker虽然很强大，但也有缺点：
我们需要一套容器编排工具：
- docker compose、docker sarm
- Mesosphere + Marathon
Kubernetes(K8s)
Kubernetes(K8s)概述
- 官网：https://kubernetes.io/zh/
- 由来：谷歌的Borg系统，后经Go语言重写并捐献给CNCF基金会开源
- 作用：开源的容器编排框架工具（生态机器丰富）
- github：https://github.com/kubernetes/kubernetes/releases
Kubernetes快速入门
四组基本概念
-
Pod/Pod控制器
Pod
- Pod是K8s里能够被运行的最小的逻辑单元（原子单元）
- 1个Pod里面可以运行多个容器，他们共享UTS+NET+IPC名称空间
- 可以把Pod理解成豌豆荚，而同一Pod内的每个容器是一颗颗豌豆
- 一个Pod里运行多个容器，又叫：边车（SideCar）模式
Pod控制器
- 是Pod启动的一种模板，用来保证在K8s里启动的Pod应始终按照人们的预期运行
- 众多Pod控制器：Deployment、DaemonSet…
-
Name/Namespace
Name
- 由于K8s内部，使用“资源”来定义每一种逻辑概念（功能），故每种“资源”，都应该有自己的“名称”
- “资源”有api版本、类别、元数据等信息
- “名称”通常定义在“资源”的元数据信息里
Namespace
- 随着项目增多、人员增加、集群规模变大，需要一种能够隔离K8s内各种“资源”的方法，这就是名称空间
- 可以理解为K8s内部的虚拟及群组
- 默认的：default、kube-system\kube-public
- 查询k8s里特定的“资源”要带上相应的名称空间
-
Label/Label选择器
Label
- 便于分类管理资源对象
- 一个标签可以对于多个资源，一个资源也可以有多个标签，多对多
- 组成：key=value
- 类似的：注解，annotations
Label选择器
- 给资源打赏标签后，可以使用标签选择器过滤指定的标签
- 标签选择器目前有两个：基于等值关系的和基于集合关系
- 许多资源支持内嵌标签选择器字段：matchLabels、matchExpressions
-
Service/Ingress
Service
- 在K8s的世界里，虽然每个Pod都会被分配一个单独的IP地址，但这个IP地址会随着Pod的销毁而消失。
- Service（服务）就是用来解决这个问题的核心概念
- 一个Service可以看作是一组提供相同服务的Pod的对外访问接口
- Service作用于哪些Pod是通过标签选择器来定义的
Ingress
- Ingress是K8s集群的工作在OSI网络参考模型下，第7层的应用，对外暴露的接口
- Service只能进行L4流量调度，表现形式是ip+port
- Ingress则可以调度不同业务域、不同URL访问路径的业务流量
常见的K8s安装部署方式
- Minikube
- 二进制安装部署（生产首选，新手）
- 使用kubeadmin进行部署（相对简单，老手）
准备工作
- 五台虚拟机
- 2c/2G/50g 192.168.12.0/24
- Centos7
安装cnetos7，选择web service安装即可，虚拟机网络模式选nat模式，
windows配置vmnet8的ipv4
# ip
192.168.12.1
# 掩码
255.255.255.0
# 首选DNS
192.168.12.11
虚拟机netvm8设置
# IP
192.168.12.0
# 掩码
255.255.255.0
# 网关
192.168.12.254
Centos8网络ip配置、主机名、epel源、常用工具安装
[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0
TYPE=Ethernet
IPADDR=192.168.12.200
NETMASK=255.255.255.0
GATEWAY=192.168.12.254
DNS1=192.168.12.254
BOOTPROTO=none
NAME=eth0
DEVICE=eth0
ONBOOT=yes
[root@localhost ~]# nmcli c reload
[root@localhost ~]# reboot
[root@localhost ~]# ping baidu.com
PING baidu.com (39.156.69.79) 56(84) bytes of data.
64 bytes from 39.156.69.79 (39.156.69.79): icmp_seq=1 ttl=128 time=24.1 ms
64 bytes from 39.156.69.79 (39.156.69.79): icmp_seq=2 ttl=128 time=23.8 ms
^Z
[1]+ Stopped ping baidu.com
[root@localhost ~]# hostnamectl set-hostname hdss12-200.host.com
[root@hdss12-200 ~]# vi /etc/selinux/config
SELINUX=disabled
[root@hdss12-200 ~]# reboot
[root@hdss12-200 ~]# getenforce
Disabled
[root@hdss12-200 ~]# systemctl stop firewalld
[root@hdss12-200 ~]# wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-8.repo
[root@hdss12-200 ~]# yum clean all
[root@hdss12-200 ~]# yum makecache
[root@hdss12-200 ~]# yum install wget net-tools telnet tree nmap sysstat lrzsz dos2unix bind-utils -y
bind9部署dns
hdss12-11上
named
[root@hdss12-11 ~]# yum install bind -y
[root@hdss12-11 ~]# rpm -qa bind
bind-9.11.26-4.el8_4.x86_64
[root@hdss12-11 ~]# vi /etc/named.conf
listen-on port 53 { 192.168.12.11; };
allow-query { any; };
forwarders { 192.168.12.254; };
dnssec-enable no;
dnssec-validation no;
[root@hdss12-11 ~]# named-checkconf
区域配置文件
/etc/named.rfc1912.zones
zone "host.com" IN {
type master;
file "host.com.zone";
allow-update { 192.168.12.11; };
};
zone "od.com" IN {
type master;
file "od.com.zone";
allow-update { 192.168.12.11; };
};
/var/named/host.com.zone
$ORIGIN host.com.
$TTL 600 ; 10 minutes
@ IN SOA dns.host.com. dnsadmin.host.com. (
20210618 ; serial
10800 ; refresh (3 hours)
900 ; retry (15 minutes)
604800 ; expire (1 week)
86400 ; minumun (1 day)
)
NS dns.host.com.
$TTL 60 ; 1 minutes
dns A 192.168.12.11
HDSS12-11 A 192.168.12.11
HDSS12-12 A 192.168.12.12
HDSS12-21 A 192.168.12.21
HDSS12-22 A 192.168.12.22
HDSS12-200 A 192.168.12.200
/var/named/od.com.zone
$ORIGIN od.com.
$TTL 600 ; 10 minutes
@ IN SOA dns.host.com. dnsadmin.host.com. (
2021061801 ; serial
10800 ; refresh (3 hours)
900 ; retry (15 minutes)
604800 ; expire (1 week)
86400 ; minumun (1 day)
)
NS dns.od.com.
$TTL 60 ; 1 minutes
dns A 192.168.12.11
启动
[root@hdss12-11 ~]# systemctl start named
[root@hdss12-11 ~]# netstat -luntp|grep 53
tcp 0 0 192.168.12.11:53 0.0.0.0:* LISTEN 27874/named
tcp 0 0 127.0.0.1:953 0.0.0.0:* LISTEN 27874/named
tcp6 0 0 ::1:53 :::* LISTEN 27874/named
tcp6 0 0 ::1:953 :::* LISTEN 27874/named
udp 0 0 192.168.12.11:53 0.0.0.0:* 27874/named
udp6 0 0 ::1:53
[root@hdss12-11 ~]# dig -t A hdss12-21.host.com @192.168.12.11 +short
最后把所有机器的DNS1改为：192.168.12.11，一定要关闭防火墙，此时用域名全部可以ping通
准备证书签发环境
运维主机HDSS12-200主机上
下载工具
wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -O /usr/bin/cfssl
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -O /usr/bin/cfssl-json
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -O /usr/bin/cfssl-certinfo
[root@hdss12-200 ~]# chmod u+x /usr/bin/cfssl*
[root@hdss12-200 ~]# mkdir /opt/certs/ ; cd /opt/certs/
[root@hdss12-200 certs]# vim /opt/certs/ca-csr.json
{
"CN": "BigSmart",
"hosts": [
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
],
"ca": {
"expiry": "175200h"
}
}
# 签发证书
[root@hdss12-200 certs]# cfssl gencert -initca ca-csr.json | cfssl-json -bare ca
2021/06/19 02:20:23 [INFO] generating a new CA key and certificate from CSR
2021/06/19 02:20:23 [INFO] generate received request
2021/06/19 02:20:23 [INFO] received CSR
2021/06/19 02:20:23 [INFO] generating key: rsa-2048
2021/06/19 02:20:23 [INFO] encoded CSR
2021/06/19 02:20:23 [INFO] signed certificate with serial number 447914809879871710040761543206458018822100175097
[root@hdss12-200 certs]# ls
ca.csr ca-csr.json ca-key.pem ca.pem
[root@hdss12-200 certs]# cat ca.pem
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
部署私有镜像仓库harbor
HDSS12-200, HDSS12-21, HDSS12-21上
安装docker
yum erase podman buildah -y
curl -fsSL https://get.docker.com |bash -s docker --mirror Aliyun
daemon.json
{
"graph": "/data/docker",
"storage-driver": "overlay2",
"insecure-registries": ["registry.access.redhat.com", "quay.io"],
"registry-mirrors": ["https://q2gr04ke.mirror.aliyuncs.com/"],
"bip": "172.17.22.1/24", # 对于ip对应一段
"exec-opts": ["native.cgroupdriver=systemd"],
"live-restore":true
}
12-200安装harbor
[root@hdss12-200 ~]# cd /opt
[root@hdss12-200 opt]# mkdir src
[root@hdss12-200 opt]# cd src
[root@hdss12-200 src]# wget https://github.com/goharbor/harbor/releases/download/v1.9.4/harbor-offline-installer-v1.9.4.tgz
[root@hdss12-200 src]# ls
harbor-offline-installer-v1.9.4.tgz
[root@hdss12-200 src]# tar xf harbor-offline-installer-v1.9.4.tgz -C /opt/
[root@hdss12-200 src]# cd /opt/
[root@hdss12-200 opt]# ll
total 0
drwxr-xr-x. 2 root root 71 Jun 19 02:20 certs
drwx--x--x. 4 root root 28 Jun 19 02:50 containerd
drwxr-xr-x 2 root root 100 Jun 19 04:26 harbor
drwxr-xr-x 2 root root 49 Jun 19 04:07 src
[root@hdss12-200 opt]# mv harbor /opt/harbor-v1.9.4
# 软连接
[root@hdss12-200 opt]# ln -s /opt/harbor-v1.9.4 /opt/harbor
[root@hdss12-200 opt]# ll
total 0
drwxr-xr-x. 2 root root 71 Jun 19 02:20 certs
drwx--x--x. 4 root root 28 Jun 19 02:50 containerd
lrwxrwxrwx 1 root root 18 Jun 19 04:27 harbor -> /opt/harbor-v1.9.4
drwxr-xr-x 2 root root 100 Jun 19 04:26 harbor-v1.9.4
drwxr-xr-x 2 root root 49 Jun 19 04:07 src
[root@hdss12-200 opt]# vim /opt/harbor/harbor.yml
hostname: harbor.ld.com
http:
port: 180
data_volume: /data/harbor
location: /data/harbor/logs
[root@hdss12-200 opt]# curl -L https://github.com/docker/compose/releases/download/1.25.0/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
[root@hdss12-200 opt]# rpm -qa docker-compose
[root@hdss12-200 ~]# cd /opt/harbor/
[root@hdss12-200 ~]# systemctl restart docker
[root@hdss12-200 harbor]# ./install.sh
[root@hdss12-200 harbor]# docker ps -a
[root@hdss12-200 harbor]# yum install nginx -y
[root@hdss12-200 harbor]# vi /etc/nginx/conf.d/harbor.od.com.conf
server {
listen 80;
server_name harbor.od.com;
client_max_body_size 1000m;
location / {
proxy_pass http://127.0.0.1:180;
}
}
[root@hdss12-200 harbor]# vim /etc/rc.d/rc.local # 增加以下内容
# start harbor
cd /opt/harbor
/usr/docker-compose stop
/usr/docker-compose start
12-11上配置DNS解析
[root@hdss12-11 ~]# vim /var/named/od.com.zone
$ORIGIN od.com.
$TTL 600 ; 10 minutes
@ IN SOA dns.host.com. dnsadmin.host.com. (
2021061805 ; serial
10800 ; refresh (3 hours)
900 ; retry (15 minutes)
604800 ; expire (1 week)
86400 ; minumun (1 day)
)
NS dns.od.com.
$TTL 60 ; 1 minute
dns A 192.168.12.11
harbor A 192.168.12.200
[root@hdss12-11 ~]# systemctl start named
[root@hdss12-11 ~]# host harbor.od.com
harbor.od.com has address 192.168.12.200
浏览器访问
harbor.od.com
信息在：cat /opt/harbor/harbor.yml
登陆：admin
密码：你修改的密码 harbor_admin_password: xxxxxx
新建一个公开项目
向harbor推送nginx镜像
hdss12-200
~]# docker pull nginx:1.7.9
~]# docker tag nginx:1.7.9 harbor.od.com/public/nginx:v1.7.9
~]# docker login harbor.od.com
~]# docker push harbor.od.com/public/nginx:v1.7.9
此时查看你的harbor仓库，已经推送过来
K8s部署Master节点服务
部署etcd集群
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
签发etcd证书
证书签发服务器 hdss12-200:
-
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
{
"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"
]
}
}
}
}
- 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
{
"CN": "k8s-etcd",
"hosts": [
"192.168.12.11",
"192.168.12.12",
"192.168.12.21",
"192.168.12.22"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
- 签发证书
[root@hdss12-200 harbor]# cd /opt/certs/
[root@hdss12-200 certs]# vi ca-config.json
[root@hdss12-200 certs]# vi etcd-peer-csr.json
[root@hdss12-200 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
2021/06/21 01:59:38 [INFO] generate received request
2021/06/21 01:59:38 [INFO] received CSR
2021/06/21 01:59:38 [INFO] generating key: rsa-2048
2021/06/21 01:59:38 [INFO] encoded CSR
2021/06/21 01:59:38 [INFO] signed certificate with serial number 3343196185397592834557614861518706185986191828
2021/06/21 01:59:38 [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@hdss12-200 certs]# ll
total 36
-rw-r--r-- 1 root root 841 Jun 21 01:56 ca-config.json
-rw-r--r--. 1 root root 993 Jun 19 02:20 ca.csr
-rw-r--r--. 1 root root 252 Jun 19 02:20 ca-csr.json
-rw-------. 1 root root 1675 Jun 19 02:20 ca-key.pem
-rw-r--r--. 1 root root 1342 Jun 19 02:20 ca.pem
-rw-r--r-- 1 root root 1062 Jun 21 01:59 etcd-peer.csr
-rw-r--r-- 1 root root 379 Jun 21 01:58 etcd-peer-csr.json
-rw------- 1 root root 1679 Jun 21 01:59 etcd-peer-key.pem
-rw-r--r-- 1 root root 1428 Jun 21 01:59 etcd-peer.pem
安装etcd
12-12,12-21,12-22上
etcd地址：https://github.com/etcd-io/etcd/
实验使用版本: etcd-v3.1.20-linux-amd64.tar.gz
📎etcd-v3.1.20-linux-amd64.tar.gz
- 下载etcd
[root@hdss12-12 ~]# useradd -s /sbin/nologin -M etcd
[root@hdss12-12 ~]# mkdir -p /opt/src
[root@hdss12-12 ~]# cd /opt/src/
[root@hdss12-12 src]# wget https://github.com/etcd-io/etcd/releases/download/v3.1.20/etcd-v3.1.20-linux-amd64.tar.gz
[root@hdss12-12 src]# tar -xf etcd-v3.1.20-linux-amd64.tar.gz
[root@hdss12-12 src]# mv etcd-v3.1.20-linux-amd64 /opt/etcd-v3.1.20
[root@hdss12-12 src]# ln -s /opt/etcd-v3.1.20 /opt/etcd
[root@hdss12-12 src]# ll /opt/etcd
lrwxrwxrwx 1 root root 17 Jun 21 02:06 /opt/etcd -> /opt/etcd-v3.1.20
[root@hdss12-12 src]# mkdir -p /opt/etcd/certs /data/etcd /data/logs/etcd-server
- 下发证书到各个etcd上
[root@hdss12-12 ~]# cd /opt/etcd/certs/
[root@hdss12-12 certs]# scp hdss12-200:/opt/certs/ca.pem .
root@hdss12-200's password:
ca.pem 100% 1342 80.6KB/s 00:00
[root@hdss12-12 certs]# scp hdss12-200:/opt/certs/etcd-peer.pem .
root@hdss12-200's password:
etcd-peer.pem 100% 1428 88.1KB/s 00:00
[root@hdss12-12 certs]# scp hdss12-200:/opt/certs/etcd-peer-key.pem .
root@hdss12-200's password:
etcd-peer-key.pem 100% 1679 149.3KB/s 00:00
[root@hdss12-12 certs]# ls
ca.pem etcd-peer-key.pem etcd-peer.pem
- 创建etcd启动脚本
[root@hdss12-12 certs]# vim /opt/etcd/etcd-server-startup.sh
#!/bin/sh
./etcd/etcd --name etcd-server-12-12 \
--data-dir /data/etcd/etcd-server \
--listen-peer-urls https://192.168.12.12:2380 \
--listen-client-urls https://192.168.12.12:2379,http://127.0.0.1:2379 \
--quota-backend-bytes 8000000000 \
--initial-advertise-peer-urls https://192.168.12.12:2380 \
--advertise-client-urls https://192.168.12.12:2379,http://127.0.0.1:2379 \
--initial-cluster etcd-server-12-12=https://192.168.12.12:2380,etcd-server-12-21=https://192.168.12.21:2380,etcd-server-12-22=https://192.168.12.22:2380 \
--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@hdss12-12 certs]# chmod u+x /opt/etcd/etcd-server-startup.sh
[root@hdss12-12 certs]# chown -R etcd.etcd /opt/etcd/ /data/etcd /data/logs/etcd-server
启动etcd
12-12,12-21,12-22上
# 安装supervisor
[root@hdss12-12 certs]# yum install -y python36
[root@hdss12-12 certs]# pip3 install supervisor
[root@hdss12-12 certs]# echo_supervisord_conf>/etc/supervisord.conf
[root@hdss12-12 certs]# vi /etc/supervisord.conf
[program:etcd-server-12-12]
command=/opt/etcd/etcd-server-startup.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/etcd ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; retstart at unexpected quit (default: true)
startsecs=30 ; number of secs prog must stay running (def. 1)
startretries=3 ; max # of serial start failures (default 3)
exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT ; signal used to kill process (default TERM)
stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
user=etcd ; setuid to this UNIX account to run the program
redirect_stderr=true ; redirect proc stderr to stdout (default false)
stdout_logfile=/data/logs/etcd-server/etcd.stdout.log ; stdout log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=5 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false
[root@hdss12-22 certs]# supervisord -c /etc/supervisord.conf
sudo unlink /tmp/supervisor.sock # stop
[root@hdss12-22 certs]# supervisorctl update
[root@hdss12-22 certs]# supervisorctl status
[root@hdss12-21 ~]# cd /opt/etcd
[root@hdss12-21 etcd]# ll
total 30072
drwxr-xr-x 2 etcd etcd 66 Jun 22 01:32 certs
drwxr-xr-x 11 etcd etcd 4096 Oct 10 2018 Documentation
-rwxr-xr-x 1 etcd etcd 16406432 Oct 10 2018 etcd
-rwxr-xr-x 1 etcd etcd 14327712 Oct 10 2018 etcdctl
-rwxr--r-- 1 etcd etcd 1019 Jun 22 01:28 etcd-server-startup.sh
-rw-r--r-- 1 etcd etcd 32632 Oct 10 2018 README-etcdctl.md
-rw-r--r-- 1 etcd etcd 5878 Oct 10 2018 README.md
-rw-r--r-- 1 etcd etcd 7892 Oct 10 2018 READMEv2-etcdctl.md
三个etcd是健康的
[root@hdss12-21 etcd]# ./etcdctl cluster-health
member 46fe8b9a7c2785d is healthy: got healthy result from http://127.0.0.1:2379
member 9884a47bdcc52154 is healthy: got healthy result from http://127.0.0.1:2379
member a011f4e7d4e3b3d8 is healthy: got healthy result from http://127.0.0.1:2379
cluster is healthy
[root@hdss12-21 etcd]# ./etcdctl member list
46fe8b9a7c2785d: name=etcd-server-12-22 peerURLs=https://192.168.12.22:2380 clientURLs=http://127.0.0.1:2379,https://192.168.12.22:2379 isLeader=false
9884a47bdcc52154: name=etcd-server-12-12 peerURLs=https://192.168.12.12:2380 clientURLs=http://127.0.0.1:2379,https://192.168.12.12:2379 isLeader=true
a011f4e7d4e3b3d8: name=etcd-server-12-21 peerURLs=https://192.168.12.21:2380 clientURLs=http://127.0.0.1:2379,https://192.168.12.21:2379 isLeader=false
安装主控节点apiserver
下载kubernetes服务端
aipserver 涉及的服务器：hdss12-21，hdss12-22
kubernetes-server-linux-amd64.tar.gz(423.2 MB)
[root@hdss12-21 supervisor]# cd /opt/src
[root@hdss12-21 src]# wget https://dl.k8s.io/v1.15.2/kubernetes-server-linux-amd64.tar.gz
[root@hdss12-21 src]# ls
etcd-v3.1.20-linux-amd64.tar.gz kubernetes kubernetes-server-linux-amd64.tar.gz
[root@hdss12-21 src]# mv kubernetes /opt/kubernetes-v1.15.2
[root@hdss12-21 src]# ln -s /opt/kubernetes-v1.15.2 /opt/kubernetes
[root@hdss12-21 src]# cd /opt/kubernetes
[root@hdss12-21 kubernetes]# rm -f kubernetes-src.tar.gz
[root@hdss12-21 kubernetes]# cd server/bin/
[root@hdss12-21 bin]# rm -f *.tar *_tag
[root@hdss12-21 bin]# ll
total 884636
-rwxr-xr-x 1 root root 43534816 Aug 5 2019 apiextensions-apiserver
-rwxr-xr-x 1 root root 100548640 Aug 5 2019 cloud-controller-manager
-rwxr-xr-x 1 root root 200648416 Aug 5 2019 hyperkube
-rwxr-xr-x 1 root root 40182208 Aug 5 2019 kubeadm
-rwxr-xr-x 1 root root 164501920 Aug 5 2019 kube-apiserver
-rwxr-xr-x 1 root root 116397088 Aug 5 2019 kube-controller-manager
-rwxr-xr-x 1 root root 42985504 Aug 5 2019 kubectl
-rwxr-xr-x 1 root root 119616640 Aug 5 2019 kubelet
-rwxr-xr-x 1 root root 36987488 Aug 5 2019 kube-proxy
-rwxr-xr-x 1 root root 38786144 Aug 5 2019 kube-scheduler
-rwxr-xr-x 1 root root 1648224 Aug 5 2019 mounter
签发证书
- 签发client证书（apiserver和etcd通信证书）hdss12-200
[root@hdss12-200 ~]# cd /opt/certs/
[root@hdss12-200 certs]# vim /opt/certs/client-csr.json
{
"CN": "k8s-node",
"hosts": [
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
[root@hdss12-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client client-csr.json |cfssl-json -bare client
[root@hdss12-200 certs]# ls client* -l
-rw-r--r-- 1 root root 993 Jun 22 02:53 client.csr
-rw-r--r-- 1 root root 223 Jun 22 02:53 client-csr.json
-rw------- 1 root root 1679 Jun 22 02:53 client-key.pem
-rw-r--r-- 1 root root 1363 Jun 22 02:53 client.pem
- 签发server证书（apiserver和其它k8s组件通信使用）
[root@hdss12-200 certs]# vim /opt/certs/apiserver-csr.json
{
"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",
"192.168.12.10",
"192.168.12.21",
"192.168.12.22",
"192.168.12.23"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
[root@hdss12-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server apiserver-csr.json |cfssl-json -bare apiserver
[root@hdss12-200 certs]# ls apiserver* -l
-rw-r--r-- 1 root root 1249 Jun 22 03:00 apiserver.csr
-rw-r--r-- 1 root root 432 Jun 22 02:59 apiserver-csr.json
-rw------- 1 root root 1679 Jun 22 03:00 apiserver-key.pem
-rw-r--r-- 1 root root 1598 Jun 22 03:00 apiserver.pem
- 证书下发
[root@hdss12-200 certs]# for i in 21 22;do echo hdss12-$i;ssh hdss12-$i "mkdir /opt/kubernetes/server/bin/certs";scp apiserver-key.pem apiserver.pem ca-key.pem ca.pem client-key.pem client.pem hdss12-$i:/opt/kubernetes/server/bin/certs/;done
配置apiserver日志审计
aipserver 涉及的服务器：hdss12-21，hdss12-22
[root@hdss12-22 bin]# mkdir /opt/kubernetes/conf
[root@hdss12-22 bin]# vim /opt/kubernetes/conf/audit.yaml
apiVersion: audit.k8s.io/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"
配置启动脚本
aipserver 涉及的服务器：hdss7-21，hdss7-22
- 创建启动脚本
[root@hdss12-22 bin]# mkdir -p /data/logs/kubernetes/kube-apiserver/
[root@hdss12-22 bin]# vim /opt/kubernetes/server/bin/kube-apiserver-startup.sh
#!/bin/bash
./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://192.168.12.12:2379,https://192.168.12.21:2379,https://192.168.12.22:2379 \
--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
[root@hdss12-22 bin]# chmod +x /opt/kubernetes/server/bin/kube-apiserver-startup.sh
- 配置supervisor启动配置
[program:kube-apiserver-12-21]
command=/opt/kubernetes/server/bin/kube-apiserver-startup.sh
numprocs=1
directory=/opt/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
[root@hdss12-21 bin]# supervisorctl update
[root@hdss12-22 certs]# supervisorctl status
etcd-server-7-22 RUNNING pid 3348, uptime 8:17:52
kube-apiserver-12-22 RUNNING pid 3852, uptime 0:00:46
配置apiserver L4代理
12-11和12-12
nginx配置
[root@hdss12-12 etcd]# yum install nginx -y
[root@hdss12-11 ~]# vim /etc/nginx/nginx.conf
# 追加
stream {
upstream kube-apiserver {
server 192.168.12.21:6443 max_fails=3 fail_timeout=30s;
server 192.168.12.22:6443 max_fails=3 fail_timeout=30s;
}
server {
listen 7443;
proxy_connect_timeout 2s;
proxy_timeout 900s;
proxy_pass kube-apiserver;
}
}
[root@hdss12-12 etcd]# systemctl start nginx; systemctl enable nginx
keepalived配置
[root@hdss12-11 ~]# yum install keepalived -y
[root@hdss12-11 ~]# vi /etc/keepalived/check_port.sh
#!/bin/bash
CHK_POR=$1
if [ -n "$CHK_PORT" ];then
PORT_PROCESS=`ss -lt|grep $CHK_PORT|wc -1`
if [ $PORT_PROCESS -eq 0 ];then
echo "PORT $CHK_PORT Is Not Used,End."
exit 1
fi
else
echo "Check Port Cant Be Empty!"
fi
[root@hdss12-11 ~]# chmod +X /etc/keepalived/check_port.sh
# 主
[root@hdss12-11 ~]# vi /etc/keepalived/keepalived.conf
# 先gg定位到开始，然后:.,$d删除所有，再:set paste设为粘贴模式粘贴，最后:wq保存退出
! Configuration File for keepalived
global_defs {
router_id 192.168.12.11
}
vrrp_script chk_nginx {
script "/etc/keepalived/check_port.sh 7443"
interval 2
weight -20
}
vrrp_instance VI_1 {
state MASTER
interface eth0
virtual_router_id 251
priority 100
advert_int 1
mcast_src_ip 192.168.12.11
nopreempt
authentication {
auth_type PASS
auth_pass 11111111
}
track_script {
chk_nginx
}
virtual_ipaddress {
192.168.12.10
}
}
# 从
[root@hdss12-12 ~]# vi /etc/keepalived/keepalived.conf
! Configuration File for keepalived
global_defs {
router_id 192.168.12.12
}
vrrp_script chk_nginx {
script "/etc/keepalived/check_port.sh 7443"
interval 2
weight -20
}
vrrp_instance VI_1 {
state BACKUP
interface eth0
virtual_router_id 251
priority 90
advert_int 1
mcast_src_ip 192.168.12.12
authentication {
auth_type PASS
auth_pass 11111111
}
track_script {
chk_nginx
}
virtual_ipaddress {
192.168.12.10
}
}
[root@hdss12-11 ~]# systemctl start keepalived
[root@hdss12-11 ~]# systemctl enable keepalived
# 主上测试
[root@hdss12-11 ~]# ip add
inet 192.168.12.10/32 scope global eth0
valid_lft forever preferred_lft forever
如果主机器的nginx出故障keepalived会飘到从机上
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
配置启动脚本
- 创建启动脚本
[root@hdss12-21 bin]# vim /opt/kubernetes/server/bin/kube-controller-manager-startup.sh
#!/bin/sh
./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@hdss12-21 bin]# mkdir -p /data/logs/kubernetes/kube-controller-manager
[root@hdss12-21 bin]# chmod u+x /opt/kubernetes/server/bin/kube-controller-manager-startup.sh
- 配置supervisor启动配置
vi /etc/supervisord.conf
[program:kube-controller-manager-12-21]
command=/opt/kubernetes/server/bin/kube-controller-manager-startup.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/kubernetes/server/bin ; directory to cwd to before exec (def no cwd)
autostart=true ; start at supervisord start (default: true)
autorestart=true ; retstart at unexpected quit (default: true)
startsecs=30 ; number of secs prog must stay running (def. 1)
startretries=3 ; max # of serial start failures (default 3)
exitcodes=0,2 ; 'expected' exit codes for process (default 0,2)
stopsignal=QUIT ; signal used to kill process (default TERM)
stopwaitsecs=10 ; max num secs to wait b4 SIGKILL (default 10)
user=root ; setuid to this UNIX account to run the program
redirect_stderr=true ; redirect proc stderr to stdout (default false)
stdout_logfile=/data/logs/kubernetes/kube-controller-manager/controller.stdout.log ; stderr log path, NONE for none; default AUTO
stdout_logfile_maxbytes=64MB ; max # logfile bytes b4 rotation (default 50MB)
stdout_logfile_backups=4 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in 'capturemode' (default 0)
stdout_events_enabled=false
[root@hdss12-21 bin]# supervisorctl update
kube-controller-manager-12-21: added process group
[root@hdss12-21 bin]# supervisorctl status
etcd-server-7-21 RUNNING pid 1804, uptime 3:41:00
kube-apiserver-12-21 RUNNING pid 1805, uptime 3:41:00
kube-controller-manager-12-21 RUNNING pid 2051, uptime 0:00:32
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
- 创建启动脚本
[root@hdss12-21 bin]# vim /opt/kubernetes/server/bin/kube-scheduler-startup.sh
#!/bin/sh
./kube-scheduler \
--leader-elect \
--log-dir /data/logs/kubernetes/kube-scheduler \
--master http://127.0.0.1:8080 \
--v 2
[root@hdss12-21 bin]# chmod u+x /opt/kubernetes/server/bin/kube-scheduler-startup.sh
[root@hdss12-21 bin]# mkdir -p /data/logs/kubernetes/kube-scheduler
- 配置supervisor启动配置
[root@hdss12-21 bin]# vi /etc/supervisord.conf
[program:kube-scheduler-12-21]
command=/opt/kubernetes/server/bin/kube-scheduler-startup.sh
numprocs=1
directory=/opt/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
[root@hdss12-21 bin]# supervisorctl update
kube-scheduler-12-21: added process group
[root@hdss12-21 bin]# supervisorctl status
检查主控节点状态
[root@hdss12-21 bin]# ln -s /opt/kubernetes/server/bin/kubectl /usr/local/bin/
[root@hdss12-21 etcd]# kubectl get cs
NAME STATUS MESSAGE ERROR
controller-manager Healthy ok
etcd-0 Healthy {"health": "true"}
scheduler Healthy ok
etcd-2 Healthy {"health": "true"}
etcd-1 Healthy {"health": "true"}
运算节点部署
kubelet 部署
签发证书
证书签发在 hdss7-200 操作
[root@hdss12-200 ~]# cd /opt/certs/
[root@hdss12-200 certs]# vim kubelet-csr.json
{
"CN": "k8s-kubelet",
"hosts": [
"127.0.0.1",
"192.168.12.10",
"192.168.12.21",
"192.168.12.22",
"192.168.12.23",
"192.168.12.24",
"192.168.12.25",
"192.168.12.26",
"192.168.12.27",
"192.168.12.28"
],
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
[root@hdss12-200 certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server kubelet-csr.json | cfssl-json -bare kubelet
2021/06/23 02:54:06 [INFO] generate received request
2021/06/23 02:54:06 [INFO] received CSR
2021/06/23 02:54:06 [INFO] generating key: rsa-2048
2021/06/23 02:54:07 [INFO] encoded CSR
2021/06/23 02:54:07 [INFO] signed certificate with serial number 561527506472962048178887337594817380054073789266
2021/06/23 02:54:07 [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@hdss12-200 certs]# scp kubelet.pem kubelet-key.pem hdss12-21:/opt/kubernetes/server/bin/certs/
root@hdss12-21's password:
kubelet.pem 100% 1464 219.2KB/s 00:00
kubelet-key.pem 100% 1675 622.3KB/s 00:00
[root@hdss12-200 certs]# scp kubelet.pem kubelet-key.pem hdss12-22:/opt/kubernetes/server/bin/certs/
root@hdss12-22's password:
kubelet.pem 100% 1464 104.7KB/s 00:00
kubelet-key.pem
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@hdss12-21 conf]# pwd
/opt/kubernetes/conf
[root@hdss12-21 conf]# kubectl config set-cluster myk8s \
--certificate-authority=/opt/kubernetes/server/bin/certs/ca.pem \
--embed-certs=true \
--server=https://192.168.12.10:7443 \
--kubeconfig=/opt/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
kubectl config set-credentials k8s-node \
--client-certificate=/opt/kubernetes/server/bin/certs/client.pem \
--client-key=/opt/kubernetes/server/bin/certs/client-key.pem \
--embed-certs=true \
--kubeconfig=/opt/kubernetes/conf/kubelet.kubeconfig
- set-context # 设置context，即确定账号和集群对应关系
kubectl config set-context myk8s-context \
--cluster=myk8s \
--user=k8s-node \
--kubeconfig=/opt/kubernetes/conf/kubelet.kubeconfig
- use-context # 设置当前使用哪个context
kubectl config use-context myk8s-context --kubeconfig=/opt/kubernetes/conf/kubelet.kubeconfig
把此配置文件传给另一台就不用做以上四步
scp /opt/kubernetes/conf/kubelet.kubeconfig hdss12-22:/opt/kubernetes/conf/
授权k8s-node用户
此步骤只需要在一台master节点执行12-21
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@hdss12-21 conf]# pwd
/opt/kubernetes/conf
[root@hdss12-21 conf]# vim k8s-node.yaml
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: k8s-node
roleRef:
apiGroup: rbac.authorization.k8s.io
kind: ClusterRole
name: system:node
subjects:
- apiGroup: rbac.authorization.k8s.io
kind: User
name: k8s-node
[root@hdss12-21 conf]# kubectl create -f k8s-node.yaml
clusterrolebinding.rbac.authorization.k8s.io/k8s-node created
[root@hdss12-21 conf]# kubectl get clusterrolebinding k8s-node
NAME AGE
k8s-node 24s
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@hdss12-200 ~]# docker image pull kubernetes/pause
Using default tag: latest
latest: Pulling from kubernetes/pause
4f4fb700ef54: Pull complete
b9c8ec465f6b: Pull complete
Digest: sha256:b31bfb4d0213f254d361e0079deaaebefa4f82ba7aa76ef82e90b4935ad5b105
Status: Downloaded newer image for kubernetes/pause:latest
docker.io/kubernetes/pause:latest
[root@hdss12-200 ~]# docker image tag kubernetes/pause:latest harbor.od.com/public/pause:latest
[root@hdss12-200 ~]# docker login -u admin harbor.od.com
Password:
WARNING! Your password will be stored unencrypted in /root/.docker/config.json.
Configure a credential helper to remove this warning. See
https://docs.docker.com/engine/reference/commandline/login/#credentials-store
Login Succeeded
[root@hdss12-200 ~]# docker image push harbor.od.com/public/pause:latest
The push refers to repository [harbor.od.com/public/pause]
5f70bf18a086: Mounted from public/nginx
e16a89738269: Pushed
latest: digest: sha256:b31bfb4d0213f254d361e0079deaaebefa4f82ba7aa76ef82e90b4935ad5b105 size: 938
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@hdss12-22 conf]# vim /opt/kubernetes/server/bin/kubelet-startup.sh
#!/bin/sh
./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 hdss12-21.host.com \
--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.od.com/public/pause:latest \
--root-dir /data/kubelet
[root@hdss12-22 conf]# chmod u+x /opt/kubernetes/server/bin/kubelet-startup.sh
[root@hdss12-22 conf]# mkdir -p /data/logs/kubernetes/kube-kubelet /data/kubelet
[root@hdss12-21 conf]# vi /etc/supervisord.conf
[program:kube-kubelet-12-21]
command=/opt/kubernetes/server/bin/kubelet-startup.sh
numprocs=1
directory=/opt/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
[root@hdss12-21 conf]# supervisorctl update
kube-kubelet-12-21: added process group
[root@hdss12-21 conf]# supervisorctl status
etcd-server-7-21 RUNNING pid 1804, uptime 5:20:45
kube-apiserver-12-21 RUNNING pid 2169, uptime 1:16:33
kube-controller-manager-12-21 RUNNING pid 2528, uptime 0:01:16
kube-kubelet-12-21 RUNNING pid 2366, uptime 0:02:53
kube-scheduler-12-21
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
[root@hdss12-21 conf]# kubectl get node
NAME STATUS ROLES AGE VERSION
hdss12-21.host.com Ready <none> 2m6s v1.15.2
hdss12-22.host.com Ready <none> 2m7s v1.15.2
[root@hdss12-21 conf]# kubectl label node hdss12-21.host.com node-
node/hdss12-21.host.com labeled
[root@hdss12-21 conf]# kubectl label node hdss12-21.host.com node-
kubectl label node hdss12-22.host.com node-role.kubernetes.io/node=
kubectl label node hdss12-22.host.com node-role.kubernetes.io/master=
[root@hdss12-21 conf]# kubectl get node
NAME STATUS ROLES AGE VERSION
hdss12-21.host.com Ready master,node 4m53s v1.15.2
hdss12-22.host.com Ready master,node 4m54s v1.15.2
kube-proxy部署
签发证书
证书签发在 hdss7-200 操作
[root@hdss12-200 ~]# cd /opt/certs/
[root@hdss12-200 certs]# vim kube-proxy-csr.json
{
"CN": "system:kube-proxy",
"key": {
"algo": "rsa",
"size": 2048
},
"names": [
{
"C": "CN",
"ST": "beijing",
"L": "beijing",
"O": "od",
"OU": "ops"
}
]
}
[root@hdss12-200 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
2021/06/23 04:10:30 [INFO] generate received request
2021/06/23 04:10:30 [INFO] received CSR
2021/06/23 04:10:30 [INFO] generating key: rsa-2048
2021/06/23 04:10:30 [INFO] encoded CSR
2021/06/23 04:10:30 [INFO] signed certificate with serial number 567643149660200017349717418358993317904935342606
2021/06/23 04:10:30 [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@hdss12-200 certs]# ls kube-proxy-c* -l
-rw-r--r-- 1 root root 1005 Jun 23 04:10 kube-proxy-client.csr
-rw------- 1 root root 1679 Jun 23 04:10 kube-proxy-client-key.pem
-rw-r--r-- 1 root root 1375 Jun 23 04:10 kube-proxy-client.pem
-rw-r--r-- 1 root root 267 Jun 23 04:10 kube-proxy-csr.json
[root@hdss12-200 certs]# scp kube-proxy-client-key.pem kube-proxy-client.pem hdss12-21:/opt/kubernetes/server/bin/certs/
root@hdss12-21's password:
kube-proxy-client-key.pem 100% 1679 425.6KB/s 00:00
kube-proxy-client.pem 100% 1375 332.2KB/s 00:00
[root@hdss12-200 certs]# scp kube-proxy-client-key.pem kube-proxy-client.pem hdss12-22:/opt/kubernetes/server/bin/certs/
root@hdss12-22's password:
kube-proxy-client-key.pem 100% 1679 453.9KB/s 00:00
kube-proxy-client.pem
创建kube-proxy配置
在所有node节点创建，涉及服务器：hdss7-21 ，hdss7-22
四步曲
[root@hdss12-21 conf]# pwd
/opt/kubernetes/conf
[root@hdss12-21 conf]#
kubectl config set-cluster myk8s \
--certificate-authority=/opt/kubernetes/server/bin/certs/ca.pem \
--embed-certs=true \
--server=https://192.168.12.10:7443 \
--kubeconfig=/opt/kubernetes/conf/kube-proxy.kubeconfig
kubectl config set-credentials kube-proxy \
--client-certificate=/opt/kubernetes/server/bin/certs/kube-proxy-client.pem \
--client-key=/opt/kubernetes/server/bin/certs/kube-proxy-client-key.pem \
--embed-certs=true \
--kubeconfig=/opt/kubernetes/conf/kube-proxy.kubeconfig
kubectl config set-context myk8s-context \
--cluster=myk8s \
--user=kube-proxy \
--kubeconfig=/opt/kubernetes/conf/kube-proxy.kubeconfig
kubectl config use-context myk8s-context --kubeconfig=/opt/kubernetes/conf/kube-proxy.kubeconfig
把生成配置文件传到另一台机器 那边就可以不用做以上四步
conf]# scp kube-proxy.kubeconfig hdss12-22:/opt/kubernetes/conf/
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@hdss12-21 ~]# lsmod | grep ip_vs
[root@hdss12-21 ~]# 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@hdss12-21 ~]# lsmod | grep ip_vs
ip_vs_wrr 16384 0
ip_vs_wlc 16384 0
ip_vs_sh 16384 0
ip_vs_sed 16384 0
ip_vs_rr 16384 0
ip_vs_pe_sip 16384 0
nf_conntrack_sip 32768 1 ip_vs_pe_sip
ip_vs_ovf 16384 0
ip_vs_nq 16384 0
ip_vs_lc 16384 0
ip_vs_lblcr 16384 0
ip_vs_lblc 16384 0
ip_vs_ftp 16384 0
ip_vs_fo 16384 0
ip_vs_dh 16384 0
ip_vs 172032 28 ip_vs_wlc,ip_vs_rr,ip_vs_dh,ip_vs_lblcr,ip_vs_sh,ip_vs_ovf,ip_vs_fo,ip_vs_nq,ip_vs_lblc,ip_vs_pe_sip,ip_vs_wrr,ip_vs_lc,ip_vs_sed,ip_vs_ftp
nf_nat 45056 3 ipt_MASQUERADE,nft_chain_nat,ip_vs_ftp
nf_conntrack 172032 4 nf_nat,ipt_MASQUERADE,nf_conntrack_sip,ip_vs
nf_defrag_ipv6 20480 2 nf_conntrack,ip_vs
libcrc32c 16384 5 nf_conntrack,nf_nat,nf_tables,xfs,ip_vs
创建启动脚本
[root@hdss12-21 ~]# vim /opt/kubernetes/server/bin/kube-proxy-startup.sh
#!/bin/sh
./kube-proxy \
--cluster-cidr 172.7.0.0/16 \
--hostname-override hdss12-21.host.com \
--proxy-mode=ipvs \
--ipvs-scheduler=nq \
--kubeconfig ../../conf/kube-proxy.kubeconfig
~]# chmod u+x /opt/kubernetes-v1.15.2/server/bin/kube-proxy-startup.sh
~]# mkdir -p /data/logs/kubernetes/kube-proxy
~]# vim /etc/supervisord.conf
[program:kube-proxy-12-21]
command=/opt/kubernetes/server/bin/kube-proxy-startup.sh
numprocs=1
directory=/opt/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
[root@hdss12-21 bin]# supervisorctl update
kube-proxy-12-21: added process group
[root@hdss12-21 bin]# supervisorctl status
etcd-server-7-21 RUNNING pid 1804, uptime 6:06:49
kube-apiserver-12-21 RUNNING pid 2169, uptime 2:02:37
kube-controller-manager-12-21 RUNNING pid 2528, uptime 0:47:20
kube-kubelet-12-21 RUNNING pid 2366, uptime 0:48:57
kube-proxy-12-21 RUNNING pid 11691, uptime 0:00:50
kube-scheduler-12-21 RUNNING pid 2529, uptime 0:47:20
验证集群
[root@hdss12-21 bin]# yum install -y ipvsadm
[root@hdss12-21 bin]# 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
-> 192.168.12.21:6443 Masq 1 0 0
-> 192.168.12.22:6443 Masq 1 0 0
12-21上创建yaml文件
[root@hdss12-21 ~]# vi nginx-ds.yaml
apiVersion: extensions/v1beta1
kind: DaemonSet
metadata:
name: nginx-ds
spec:
template:
metadata:
labels:
app: nginx-ds
spec:
containers:
- name: my-nginx
image: harbor.od.com/public/nginx:v1.7.9
ports:
- containerPort: 80
[root@hdss12-21 ~]# kubectl create -f nginx-ds.yaml
[root@hdss12-21 ~]# kubectl get pods
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