文章目录

一、kubernetes的五个组件
二、kubernetes 部署

一、kubernetes的五个组件

1. master节点的三个组件

1.1 kube-apiserver

整个集群的唯一入口，并提供认证、授权、访问控制、API注册和发现等机制。

1.2 kube-controller-manager

控制器管理器
负责维护集群的状态，比如故障检测、自动扩展、滚动更新等。保证资源到达期望值。

1.3 kube-scheduler

调度器
经过策略调度POD到合适的节点上面运行。分别有预选策略和优选策略。

2 node节点的两个组件

2.1 kubelet

在集群节点上运行的代理，kubelet会通过各种机制来确保容器处于运行状态且健康。kubelet不会管理不是由kubernetes创建的容器。kubelet接收POD的期望状态（副本数、镜像、网络等），并调用容器运行环境来实现预期状态。
kubelet会定时汇报节点的状态给apiserver，作为scheduler调度的基础。kubelet会对镜像和容器进行清理，避免不必要的文件资源占用。

2.2 kube-proxy

kube-proxy是集群中节点上运行的网络代理，是实现service资源功能组件之一。kube-proxy建立了POD网络和集群网络之间的关系。不同node上的service流量转发规则会通过kube-proxy来调用apiserver访问etcd进行规则更新。
service流量调度方式有三种方式：userspace（废弃，性能很差）、iptables（性能差，复杂，即将废弃）、ipvs（性能好，转发方式清晰）。

二、kubernetes 部署

1机器环境

机器名	配置	ip地址	安装软件
master	4核8G	192.168.210.119	kube-apiserver, kube-controller-manager,kube-scheduler,etcd,docker
node1	4核8G	192.168.210.120	kubelet,kube-proxy,docker,etcd,docker
node2	4核8G	192.168.210.121	kubelet,kube-proxy,docker,etcd,docker
devops	4核8G	192.168.210.121	dns, harbor,jenkins

2 系统设置

2.1 系统设置

2.1.1 设置主机名

hostnamectl set-hostname master
hostnamectl set-hostname node1
hostnamectl set-hostname node2

2.1.2 关闭防火墙和selinux

关闭防火墙
systemctl stop firewalld
systemctl disable firewalld

关闭selinux
setenforce 0 # 临时
sed -i ‘s/enforcing/disabled/’ /etc/selinux/config # 永久

关闭swap
临时关闭:
swapoff -a
永久关闭:
echo “vm.swappiness = 0”>> /etc/sysctl.conf
sysctl -p

邮件服务关闭
systemctl stop postfix.service
systemctl disable postfix.service

2.1.3 设置网卡

cat /etc/sysconfig/network-scripts/ifcfg-eth0
TYPE=Ethernet
BOOTPROTO=none
NAME=eth0
DEVICE=eth0
ONBOOT=yes
IPADDR=xxx.xxx.xx.xxx
NETMASK=255.255.255.0
GATEWAY=xxx.xxx.xxx.xxx
DNS1=xxx.xxx.xxx.xxx

2.1.4 设置yum源

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
wget -P /etc/yum.repos.d/ http://mirrors.aliyun.com/repo/epel-7.repo
yum update

2.1.5 安装常用工具

yum install -y net-tools telnet nmap sysstat dos2unix bind-utils vim lrzsz wget tree screen lsof tcpdump bash-completion.noarch

2.1.6 同步系统时间

crontab -e
*/5 * * * * ntpdate ntp.aliyun.com

2.1.7 添加hosts

cat >> /etc/hosts << EOF
192.168.210.119 master
192.168.210.120 node1
192.168.210.121 node2
EOF

2.2 安装bind服务

devops机器上安装

2.2.1 安装bind 9

[root@devops bin]# yum install bind -y

2.2.2 配置bind 9

[root@devops bin]# vi /etc/named.conf
listen-on port 53 { 192.168.210.124; };
allow-query { any; };
forwarders { 192.168.210.254; };
recursion yes;
dnssec-enable no;
dnssec-validation no

[root@devops bin]# named-checkconf
[root@devops bin]# vi /etc/named.rfc1912.zones
zone “host.com” IN {
type master;
file “host.com.zone”;
allow-update { 192.168.210.124; };
};
zone “kkk.com” IN {
type master;
file “kkk.com.zone”;
allow-update { 192.168.210.124; };
};

[root@devops bin]# vi /var/named/host.com.zone
$TTL 1D
@ IN SOA dns.host.com. dnsadmin.host.com. (
2020082501 ; serial
1D ; refresh
1H ; retry
1W ; expire
3H ) ; minimum
NS dns.host.com.
$TTL 60 ; 1minute
dns A 192.168.210.124

[root@devops bin]# vim /var/named/host.com.zone
$TTL 1D
@ IN SOA dns.host.com. dnsadmin.host.com. (
2020082501 ; serial
1D ; refresh
1H ; retry
1W ; expire
3H ) ; minimum
NS dns.host.com.
$TTL 60 ; 1minute
dns A 192.168.210.124
master A 192.168.210.119
node1 A 192.168.210.120
node2 A 192.168.210.121

[root@devops bin]# vim /etc/sysconfig/network-scripts/ifcfg-eth0
dns1=192.168.210.124
systemctl restart network

[root@devops bin]# vim /etc/resolv.conf
search host.com

2.2.3 检查配置并启动bind 9

[root@devops bin]# named-checkconf
[root@devops bin]# systemctl start named
[root@devops bin]# netstat -lntup|grep 53

2.2.4.检查

[root@devops bin]# dig -t A master.host.com @192.168.210.124 +short
192.168.210.119
[root@devops bin]# dig -t A node1.host.com @192.168.210.124 +short
192.168.210.120
[root@devops bin]# dig -t A node2.host.com @192.168.210.124 +short
192.168.210.121

2.2.5 配置DNS客户端

Linux所有主机

[root@master bin]# vi /etc/sysconfig/network-scripts/ifcfg-eth0
DNS1=192.168.210.124
##########
[root@master bin]# vi /etc/resolv.conf
search host.com
nameserver 192.168.210.124
##########
[root@master bin]# systemctl restart network

2.2.6.检查

Linux

[root@master bin]# ping www.baidu.com
[root@master bin]# ping master.host.com

2.3 准备签发证书环境

2.3.1 安装cfssl

[root@devops bin]# wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -O /usr/bin/cfssl
[root@devops bin]# wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -O /usr/bin/cfssl-json
[root@devops bin]# wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -O /usr/bin/cfssl-certinfo
[root@devops bin]# chmod +x /usr/bin/cfssl*

2.3.2 创建生成ca证书csr的json配置文件

[root@devops bin]# 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

2.3.3.生成ca证书文件

[root@devops bin]# cd /opt/certs
[root@devops bin]# cfssl gencert -initca ca-csr.json | cfssl-json -bare ca
[root@devops bin]# ll
ca.csr
ca-csr.json
ca-key.pem
ca.pem

2.4 部署docker

master.host.com, node1.host.com，node2.host.com上

2.4.1 安装

[root@master bin]# curl -fsSL https://get.docker.com | bash -s docker --mirror Aliyun

[root@master bin]# cat > /etc/docker/daemon.json << EOF
{
“graph”: “/data/docker”,
“storage-driver”: “overlay2”,
“insecure-registries”: [“registry.access.redhat.com”,“quay.io”,“192.168.210.124”],
“registry-mirrors”: [“https://kfwkfulq.mirror.aliyuncs.com”,“https://2lqq34jg.mirror.aliyuncs.com”,“https://pee6w651.mirror.aliyuncs.com”,“https://registry.docker-cn.com”,“http://hub-mirror.c.163.com”],
“bip”: “172.7.121.1/24”,
“exec-opts”: [“native.cgroupdriver=systemd”],
“live-restore”: true
}
EOF

bip要根据宿主机ip变化
注意：master.host.com bip 172.7.119.1/24
node1.host.com bip 172.7.120.1/24
node2.host.com bip 172.7.121.1/24

2.4.3 启动

[root@master bin]# mkdir -p /data/docker
[root@master bin]# systemctl start docker
[root@master bin]# systemctl enable docker
[root@master bin]# docker --version

2.5 部署docker镜像私有仓库harbor

devops 机器

2.5.1.下载软件并解压

harbor官网github地址
https://github.com/goharbor/harbor
[root@devops bin]# tar xf harbor-offline-installer-v1.8.3.tgz -C /opt/
[root@devops bin]# mv harbor/ harbor-v1.8.3
[root@devops bin]# ln -s /opt/harbor-v1.8.3/ /opt/harbor

2.5.2.配置

2.5.3.安装docker-compose

2.5.4.安装harbor

2.5.5.检查harbor启动情况

2.5.6.配置harbor的dns内网解析

2.5.7.安装NGINX并配置

2.5.8.浏览器打开harbor.od.com并测试

1、浏览器输入：harbor.od.com 用户名：admin 密码：Harbor12345
2、新建项目：public 访问级别：公开
3、下载镜像并给镜像打tag

[root@devops bin]# docker pull nginx:1.7.9
[root@devops bin]# docker images |grep 1.7.9
[root@devops bin]# docker tag 84581e99d807 harbor.od.com/public/nginx:v1.7.9

4、登录harbor并上传到仓库

[root@master bin]# docker login harbor.od.com
[root@master bin]# docker push harbor.od.com/public/nginx:v1.7.9

2.5.9.检查

可以看到NGINX镜像已经上传到public下

3 部署master节点

3.1.部署etcd集群

3.1.1 部署机器

 master  node1  node2

3.1.2 创建基于根证书的config配置文件

devops 机器

[root@devops bin]# 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

3.1.3.创建生成自签发证书的csr的json配置文件

[root@devops bin]# cat > /opt/certs/etcd-peer-csr.json << EOF
{
“CN”: “k8s-etcd”,
“hosts”: [
“192.168.210.119”,
“192.168.210.120”,
“192.168.210.121”,
],
“key”: {
“algo”: “rsa”,
“size”: 2048
},
“names”: [
{
“C”: “CN”,
“ST”: “beijing”,
“L”: “beijing”,
“O”: “od”,
“OU”: “ops”
}
]
}
EOF

3.1.4.生成etcd证书文件

[root@devops bin]# cd /opt/certs/
[root@devops bin]# 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

3.1.5.检查生成的证书文件

[root@devops bin]# ll
etcd-peer.csr
etcd-peer-csr.json
etcd-peer-key.pem
etcd-peer.pem

3.1.6.创建etcd用户

[root@master bin]# useradd -s /sbin/nologin -M etcd

3.1.7.下载软件，解压，做软连接

https://github.com/etcd-io/etcd/tags
[root@master bin]# tar xf etcd-v3.1.20-linux-amd64.tar.gz -C /opt/
[root@master bin]# cd …
[root@master bin]# mv etcd-v3.1.20-linux-amd64/ etcd-v3.1.20
[root@master bin]# ln -s /opt/etcd-v3.1.20/ /opt/etcd

3.1.8 创建目录，拷贝证书文件

[root@master bin]# mkdir -p /opt/etcd/certs /data/etcd /data/logs/etcd-server

[root@master certs]# scp root@devops:/opt/certs/ca.pem .
[root@master certs]# scp root@devops::/opt/certs/etcd-peer.pem .
[root@master certs]# scp root@devops::/opt/certs/etcd-peer-key.pem .

3.1.9 创建etcd服务启动脚本

[root@master certs]# cat > /opt/etcd/etcd-server-startup.sh << EOF
#!/bin/sh
./etcd --name etcd-server-7-119
–data-dir /data/etcd/etcd-server
–listen-peer-urls https://192.168.210.119:2380
–listen-client-urls https://192.168.210.119:2379,http://127.0.0.1:2379
–quota-backend-bytes 8000000000
–initial-advertise-peer-urls https://192.168.210.119:2380
–advertise-client-urls https://192.168.210.119:2379,http://127.0.0.1:2379
–initial-cluster etcd-server-7-119=https://192.168.210.119:2380,etcd-server-7-120=https://192.168.210.120:2380,etcd-server-7-121=https://192.168.210.121:2380
–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
EOF

3.1.10 授权目录权限

[root@master ~]# chown -R etcd.etcd /opt/etcd-v3.1.20/ /data/etcd/ /data/logs/etcd-server/

3.1.11.安装supervisor软件

[root@master ~]# yum install supervisor -y
[root@master ~]# systemctl start supervisord
[root@master ~]# systemctl enable supervisord

3.1.12 创建supervisor配置

[root@master ~]# cat > /etc/supervisord.d/etcd-server.ini <<EOF
[program:etcd-server-7-119]
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=4 ; # of stdout logfile backups (default 10)
stdout_capture_maxbytes=1MB ; number of bytes in ‘capturemode’ (default 0)
stdout_events_enabled=false ; emit events on stdout writes (default false)
EOF

3.1.13 启动etcd服务并检查

[root@master ~]# supervisorctl update
[root@master ~]# supervisorctl status
[root@master ~]# netstat -lntup|grep etcd

3.1.14 部署启动所有集群

不同的地方

/opt/etcd/etcd-server-startup.sh
–name
–listen-peer-urls
–listen-client-urls
–initial-advertise-peer-urls
–advertise-client-urls
##########
/etc/supervisord.d/etcd-server.ini
[program:etcd-server-7-119]

3.1.15 检查集群状态

[root@master ~]# cd /opt/etcd/
[root@master etcd]# ./etcdctl cluster-health
[root@master etcd]# ./etcdctl member list

3.2 部署kube-apiserver集群

3.2.1 部署机器

master

3.2.2 下载软件，解压，做软连接

https://github.com/kubernetes/kubernetes/releases/tag/v1.15.2
CHANGELOG-1.15.md–→server binaries–→kubernetes-server-linux-amd64.tar.gz

[root@master ~]# tar xf kubernetes-server-linux-amd64-v1.15.2.tar.gz -C /opt
[root@master opt]# mv kubernetes/ kubernetes-v1.15.2
[root@master ~]# ln -s /opt/kubernetes-v1.15.2/ /opt/kubernetes
[root@master ~]# cd kubernetes
[root@master kubernetes]# rm -rf kubernetes-src.tar.gz
[root@master kubernetes]# cd server/bin
[root@master bin]# rm -f *.tar
[root@master bin]# rm -f *_tag

3.2.3.签发client证书

devops机器

1、创建生成证书csr的json配置文件
[root@devops ~]# 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

2、生成client证书文件
[root@devops certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=client client-csr.json |cfssl-json -bare client

3、检查生成的证书文件
[root@devops certs]# ll
client.csr
client-csr.json
client-key.pem
client.pem

3.2.4.签发kube-apiserver证书

1、创建生成证书csr的json配置文件
[root@devops certs]# cat > /opt/certs/apiserver-csr.json << EOF
{
“CN”: “k8s-apiserver”,
“hosts”: [
“127.0.0.1”,
“kubernetes.default”,
“kubernetes.default.svc”,
“kubernetes.default.svc.cluster”,
“kubernetes.default.svc.cluster.local”,
“192.168.210.119”,
“192.168.210.120”,
“192.168.210.121”,
“192.168.210.124”
],
“key”: {
“algo”: “rsa”,
“size”: 2048
},
“names”: [
{
“C”: “CN”,
“ST”: “beijing”,
“L”: “beijing”,
“O”: “od”,
“OU”: “ops”
}
]
}
EOF

2、生成kube-apiserver证书文件
[root@devops certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server apiserver-csr.json |cfssl-json -bare apiserver

3、检查生成的证书文件

[root@devops certs]# ll
apiserver.csr
apiserver-csr.json
apiserver-key.pem
apiserver.pem

3.2.5.拷贝证书文件至各节点，并创建配置

1、拷贝证书文件到master机器 /opt/kubernetes/server/bin/cert目录下
[root@master cert]# scp root@devops:/opt/certs/ca.pem .
[root@master cert]# scp root@devops:/opt/certs/ca-key.pem .
[root@master cert]# scp root@devops:/opt/certs/client.pem .
[root@master cert]# scp root@devops:/opt/certs/client-key.pem .
[root@master cert]# scp root@devops:/opt/certs/apiserver.pem .
[root@master cert]# scp root@devops:/opt/certs/apiserver-key.pem .

2、创建配置master

[root@master cert]# cd /opt/kubernetes/server/bin/
[root@master bin]# mkdir conf
[root@master conf]# cat > audit.yaml << EOF
apiVersion: audit.k8s.io/v1beta1 # This is required.
kind: Policy
omitStages:
  - "RequestReceived"
rules:
  - level: RequestResponse
    resources:
    - group: ""
      # Resource "pods" doesn't match requests to any subresource of pods,
      # which is consistent with the RBAC policy.
      resources: ["pods"]
  - level: Metadata
    resources:
    - group: ""
      resources: ["pods/log", "pods/status"]
  - level: None
    resources:
    - group: ""
      resources: ["configmaps"]
      resourceNames: ["controller-leader"]
  - level: None
    users: ["system:kube-proxy"]
    verbs: ["watch"]
    resources:
    - group: "" # core API group
      resources: ["endpoints", "services"]
  - level: None
    userGroups: ["system:authenticated"]
    nonResourceURLs:
    - "/api*" # Wildcard matching.
    - "/version"
  - level: Request
    resources:
    - group: "" # core API group
      resources: ["configmaps"]
    namespaces: ["kube-system"]
  - level: Metadata
    resources:
    - group: "" # core API group
      resources: ["secrets", "configmaps"]
  - level: Request
    resources:
    - group: "" # core API group
    - group: "extensions" # Version of group should NOT be included.
  - level: Metadata
    omitStages:
      - "RequestReceived"
EOF

3.2.6.创建apiserver启动脚本

[root@master ~]# cat > /opt/kubernetes/server/bin/kube-apiserver.sh << EOF
#!/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 ./cert/ca.pem
–requestheader-client-ca-file ./cert/ca.pem
–enable-admission-plugins NamespaceLifecycle,LimitRanger,ServiceAccount,DefaultStorageClass,DefaultTolerationSeconds,MutatingAdmissionWebhook,ValidatingAdmissionWebhook,ResourceQuota
–etcd-cafile ./cert/ca.pem
–etcd-certfile ./cert/client.pem
–etcd-keyfile ./cert/client-key.pem
–etcd-servers https://192.168.210.119:2379,https://192.168.210.120:2379,https://192.168.210.121:2379
–service-account-key-file ./cert/ca-key.pem
–service-cluster-ip-range 172.200.0.0/16
–service-node-port-range 3000-29999
–target-ram-mb=1024
–kubelet-client-certificate ./cert/client.pem
–kubelet-client-key ./cert/client-key.pem
–log-dir /data/logs/kubernetes/kube-apiserver
–tls-cert-file ./cert/apiserver.pem
–tls-private-key-file ./cert/apiserver-key.pem
–v 2
EOF

3.2.7.授权和创建目录

[root@master bin]# chmod +x /opt/kubernetes/server/bin/kube-apiserver.sh
[root@master bin]# mkdir -p /data/logs/kubernetes/kube-apiserver

3.2.8.创建supervisor配置

[root@master bin]# cat > /etc/supervisord.d/kube-apiserver.ini << EOF
[program:kube-apiserver-7-119]
command=/opt/kubernetes/server/bin/kube-apiserver.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-apiserver/apiserver.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 ; emit events on stdout writes (default false)
EOF

3.2.9.启动服务并检查

[root@master ~]# supervisorctl update
[root@master ~]# supervisorctl status
[root@master ~]# netstat -nltup|grep kube-api

3.2.10.部署启动所有集群

多节点部署时不同的地方
/etc/supervisord.d/kube-apiserver.ini
[program:kube-apiserver-7-xxx]

3.3.部署四层反向代理

多节点部署时需要部署keepalived，点节点只部署nginx

3.3.1 多节点部署keepalived

3.3.2.安装NGINX和keepalived

1、多节点部署时，所有节点都安装NGINX和keepalived，点节点只部署nginx代理6443
[root@master ~]# yum install nginx keepalived -y

2、hdss7-11.host.com和hdss7-12.host.com配置NGINX
[root@master ~]# cat > /etc/nginx/nginx.conf << EOF
stream {
upstream kube-apiserver {
server 192.168.210.119:6443 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;
}
}
EOF

[root@master ~]# nginx -t
[root@master ~]# systemcl restart nginx

3、master1.host.com和master2.host.com配置keepalived
3.1 检查脚本

cat > /etc/keepalived/check_port.sh << EOF
#!/bin/bash
#keepalived 监控端口脚本
#使用方法：
#在keepalived的配置文件中
#vrrp_script check_port {#创建一个vrrp_script脚本,检查配置
#script “/etc/keepalived/check_port.sh 6379” #配置监听的端口
#interval 2 #检查脚本的频率,单位（秒）
#}
CHK_PORT= $1 i f [- n "$ CHK_PORT" ];then
PORT_PROCESS=ss -lnt|grep $CHK_PORT|wc -l
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
EOF

~]# chmod +x /etc/keepalived/check_port.sh

配置文件
keepalived 主:

cat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived
global_defs {
router_id 192.168.210.119
}
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 192.168.210.119
nopreempt
authentication {
auth_type PASS
auth_pass 11111111
}
track_script {
chk_nginx
}
virtual_ipaddress {
192.168.210.123 # vip地址
}
}
EOF

keepalived 从:

cat > /etc/keepalived/keepalived.conf << EOF
! Configuration File for keepalived
global_defs {
router_id xxx.xxx.xxx.xxx
}
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
mcast_src_ip xxx.xxx.xxx.xxx
priority 90
advert_int 1
authentication {
auth_type PASS
auth_pass 11111111
}
track_script {
chk_nginx
}
virtual_ipaddress {
xxx.xxx.xxx.xxx vip地址
}
}
EOF

nopreempt：非抢占式

3.3.3.启动代理并检查

[root@master ~]# systemctl start nginx keepalived
[root@master ~]# systemctl enable nginx keepalived
[root@master ~]# netstat -lntup|grep nginx
[root@master ~]# ip addr

3.4.部署controller-manager

3.4.1 部署机器

master

3.4.2.创建启动脚本

[root@master ~]# cat > /opt/kubernetes/server/bin/kube-controller-manager.sh << EOF
#!/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 ./cert/ca-key.pem
–service-cluster-ip-range 172.200.0.0/16
–root-ca-file ./cert/ca.pem
–v 2
EOF

3.4.3.授权文件权限，创建目录

[root@master ~]# chmod +x /opt/kubernetes/server/bin/kube-controller-manager.sh
[root@master ~]# mkdir -p /data/logs/kubernetes/kube-controller-manager

3.4.4.创建supervisor配置

[root@master ~]# cat > /etc/supervisord.d/kube-conntroller-manager.ini << EOF
[program:kube-controller-manager-7-119]
command=/opt/kubernetes/server/bin/kube-controller-manager.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 ; emit events on stdout writes (default false)
EOF

3.4.5.启动服务并检查

[root@master ~]# supervisorctl update
[root@master ~]# supervisorctl status

3.4.6.部署启动所有集群

不同的地方
/etc/supervisord.d/kube-conntroller-manager.ini
[program:kube-controller-manager-7-119]

3.5.部署kube-scheduler

3.5.1 部署机器

master

3.5.2 创建启动脚本

[root@master ~]# cat > /opt/kubernetes/server/bin/kube-scheduler.sh << EOF
#!/bin/sh
./kube-scheduler
–leader-elect
–log-dir /data/logs/kubernetes/kube-scheduler
–master http://127.0.0.1:8080
–v 2
EOF

3.5.3 授权文件权限，创建目录

[root@master ~]# chmod +x /opt/kubernetes/server/bin/kube-scheduler.sh
[root@master ~]# mkdir -p /data/logs/kubernetes/kube-scheduler

3.5.4 创建supervisor配置

[root@master ~]# cat > /etc/supervisord.d/kube-scheduler.ini << EOF
[program:kube-scheduler-7-119]
command=/opt/kubernetes/server/bin/kube-scheduler.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-scheduler/scheduler.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 ; emit events on stdout writes (default false)
EOF

3.5.5.启动服务并检查

[root@master ~]# supervisorctl update
[root@master ~]# supervisorctl status

3.5.6.部署启动所有集群

多节点
不同的地方
/etc/supervisord.d/kube-scheduler.ini
[program:kube-scheduler-7-119]

3.6.检查master节点

3.6.1.建立kubectl软链接

[root@master ~]# ln -s /opt/kubernetes/server/bin/kubectl /usr/bin/kubectl
[root@node1 ~]# ln -s /opt/kubernetes/server/bin/kubectl /usr/bin/kubectl
[root@node2 ~]# ln -s /opt/kubernetes/server/bin/kubectl /usr/bin/kubectl

3.6.2.检查master节点

[root@master ~]# kubectl get cs

4.部署node节点

4.1.部署kubelet

4.1.1.集群架构

node1 node2

4.1.2.签发kubelet证书

devops 签发
1、创建生成证书csr的json配置文件
[root@devops ~]# cat > /opt/certs/kubelet-csr.json << EOF
{
“CN”: “k8s-kubelet”,
“hosts”: [
“127.0.0.1”,
“192.168.210.119”,
“192.168.210.120”,
“192.168.210.121”,
“192.168.210.123”,
“192.168.210.124”
],
“key”: {
“algo”: “rsa”,
“size”: 2048
},
“names”: [
{
“C”: “CN”,
“ST”: “beijing”,
“L”: “beijing”,
“O”: “od”,
“OU”: “ops”
}
]
}
EOF

2、生成kubelet证书文件
[root@devops certs]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=server kubelet-csr.json | cfssl-json -bare kubelet

3、检查生成的证书文件
[root@devops certs]# ll
kubelet.csr
kubelet-csr.json
kubelet-key.pem
kubelet.pem

4.1.3.拷贝证书文件至各节点，并创建配置

1、拷贝证书文件 master node节点

[root@master cert]# scp root@devops:/opt/certs/kubelet.pem .
[root@master cert]# scp root@devops:/opt/certs/kubelet-key.pem .

2、创建配置

(1)、set-cluster
[root@master conf]# kubectl config set-cluster myk8s
–certificate-authority=/opt/kubernetes/server/bin/cert/ca.pem
–embed-certs=true
–server=https://192.168.210.119:7443
–kubeconfig=kubelet.kubeconfig

(2)、set-credentials
[root@master conf]# kubectl config set-credentials k8s-node
–client-certificate=/opt/kubernetes/server/bin/cert/client.pem
–client-key=/opt/kubernetes/server/bin/cert/client-key.pem
–embed-certs=true
–kubeconfig=kubelet.kubeconfig

(3)、set-context
[root@master conf]# kubectl config set-context myk8s-context
–cluster=myk8s
–user=k8s-node
–kubeconfig=kubelet.kubeconfig

(4)、use-context
[root@master conf]# kubectl config use-context myk8s-context --kubeconfig=kubelet.kubeconfig

(5)、查看生成的kubelet.kubeconfig
[root@master conf]# ll
kubelet.kubeconfig

(6)、k8s-node.yaml
(1)创建配置文件

[root@master ~]# mkdir k8s-yaml  && cd k8s-yaml
[root@master k8s-yaml]# cat > /root/k8s-yaml/k8s-node.yaml << EOF
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
EOF

(2)应用资源配置
[root@master k8s-yaml]# kubectl create -f k8s-node.yaml

(3)查看集群角色和角色属性
[root@master k8s-yaml]# kubectl get clusterrolebinding k8s-node
[root@master k8s-yaml]# kubectl get clusterrolebinding k8s-node -o yaml

(4)拷贝kubelet.kubeconfig 到node上
[root@node1 ~]# cd /opt/kubernetes/server/bin/conf/
[root@node1 conf]# scp root@master:/opt/kubernetes/server/bin/conf/kubelet.kubeconfig .
[root@node2 ~]# cd /opt/kubernetes/server/bin/conf/
[root@node2 conf]# scp root@master:/opt/kubernetes/server/bin/conf/kubelet.kubeconfig .

4.1.4.准备pause基础镜像

1、devops下载pause镜像

[root@node2 ~]# docker pull kubernetes/pause

2、上传到docker私有仓库harbor中

(1)、给镜像打tag
[root@node2 ~]# docker images -a
[root@node2 ~]# docker tag f9d5de079539 harbor.kkk.com/public/pause:latest
[root@node2 ~]# docker images -a

(2)、上传到harbor上
[root@node2 ~]# docker push harbor.kkk.com/public/pause:latest

4.1.5 创建kubelet启动脚本

node1 node2

[root@node1 ~]# cat > /opt/kubernetes/server/bin/kubelet.sh << EOF
#!/bin/sh
./kubelet
–anonymous-auth=false
–cgroup-driver systemd
–cluster-dns 172.200.0.2
–cluster-domain cluster.local
–runtime-cgroups=/systemd/system.slice
–kubelet-cgroups=/systemd/system.slice
–fail-swap-on=“false”
–client-ca-file ./cert/ca.pem
–tls-cert-file ./cert/kubelet.pem
–tls-private-key-file ./cert/kubelet-key.pem
–hostname-override node2.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.kkk.com/public/pause:latest
–root-dir /data/kubelet
EOF

4.1.6.授权，创建目录

[root@node1 ~]# chmod +x /opt/kubernetes/server/bin/kubelet.sh
[root@node1 ~]# mkdir -p /data/logs/kubernetes/kube-kubelet /data/kubelet

4.1.7.创建supervisor配置

[root@node1 ~]# cat > /etc/supervisord.d/kube-kubelet.ini << EOF
[program:kube-kubelet-7-120]
command=/opt/kubernetes/server/bin/kubelet.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-kubelet/kubelet.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 ; emit events on stdout writes (default false)
EOF

4.1.8.启动服务并检查

[root@node1 ~]# supervisorctl update
[root@node1 ~]# supervisorctl status

4.1.9.部署所有节点

不同的地方
/opt/kubernetes/server/bin/kubelet.sh
–hostname-override
##########
/etc/supervisord.d/kube-kubelet.ini
[program:kube-kubelet-7-120]

4.1.10.检查所有节点并给节点打上标签

[root@node1 bin]# kubectl get nodes
[root@node1 bin]# kubectl label node hdss7-21.host.com node-role.kubernetes.io/master=
[root@node1 bin]# kubectl label node hdss7-21.host.com node-role.kubernetes.io/node=
[root@node1 bin]# kubectl get nodes

4.2.部署kube-proxy

4.2.1 部署机器

node1 node2

4.2.2.签发kube-proxy证书

1、创建生成证书csr的json配置文件

[root@devops 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

2、生成kube-proxy证书文件

[root@devops 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

3、检查生成的证书文件

[root@devops certs]# ll
kube-proxy-client.csr
kube-proxy-client-key.pem
kube-proxy-client.pem
kube-proxy-csr.json

4.2.3.拷贝证书文件至各节点，并创建配置

1、拷贝证书文件

[root@node1 cert]# scp root@devops:/opt/certs/kube-proxy-client.pem .
[root@node1 cert]# scp root@devops:/opt/certs/kube-proxy-client-key.pem .

2、创建配置

(1)、set-cluster
[root@master conf]# kubectl config set-cluster myk8s
–certificate-authority=/opt/kubernetes/server/bin/cert/ca.pem
–embed-certs=true
–server=https://192.168.210.119:7443
–kubeconfig=kube-proxy.kubeconfig

(2)、set-credentials
[root@master conf]# kubectl config set-credentials kube-proxy
–client-certificate=/opt/kubernetes/server/bin/cert/kube-proxy-client.pem
–client-key=/opt/kubernetes/server/bin/cert/kube-proxy-client-key.pem
–embed-certs=true
–kubeconfig=kube-proxy.kubeconfig

(3)、set-context
[root@master conf]# kubectl config set-context myk8s-context
–cluster=myk8s
–user=kube-proxy
–kubeconfig=kube-proxy.kubeconfig

(4)、use-context
[root@master conf]# kubectl config use-context myk8s-context --kubeconfig=kube-proxy.kubeconfig

(5)、拷贝kube-proxy.kubeconfig 到 node1.host.com和 node2.host.com的conf目录下
scp kube-proxy.kubeconfig node1:/opt/kubernetes/server/bin/conf/kube-proxy.kubeconfig
scp kube-proxy.kubeconfig node1:/opt/kubernetes/server/bin/conf/kube-proxy.kubeconfig

4.2.4.创建kube-proxy启动脚本

1、加载ipvs模块

[root@node1 bin]# lsmod |grep ip_vs
[root@node1 bin]# cat > /root/ipvs.sh << EOF
#!/bin/bash
ipvs_mods_dir="/usr/lib/modules/$(uname -r)/kernel/net/netfilter/ipvs"
for i in $(ls $ipvs_mods_dir|grep -o “^[.]*”)
do
/sbin/modinfo -F filename $i &>/dev/null
if [ $? -eq 0 ];then
/sbin/modprobe $i
fi
done
EOF
[root@node1 bin]# chmod +x /root/ipvs.sh
[root@node1 bin]# sh /root/ipvs.sh
[root@node1 bin]# lsmod |grep ip_vs

2、创建启动脚本

[root@node1 bin]# cat > /opt/kubernetes/server/bin/kube-proxy.sh << EOF
#!/bin/sh
./kube-proxy
–cluster-cidr 172.7.0.0/16
–hostname-override node2.host.com
–proxy-mode=ipvs
–ipvs-scheduler=nq
–kubeconfig ./conf/kube-proxy.kubeconfig
EOF

4.2.5.授权，创建目录

[root@node1 bin]# ls -l /opt/kubernetes/server/bin/conf/|grep kube-proxy
[root@node1 bin]# chmod +x /opt/kubernetes/server/bin/kube-proxy.sh
[root@node1 bin]# mkdir -p /data/logs/kubernetes/kube-proxy

4.2.6.创建supervisor配置

[root@node1 bin]# cat > /etc/supervisord.d/kube-proxy.ini << EOF
[program:kube-proxy-7-121]
command=/opt/kubernetes/server/bin/kube-proxy.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-proxy/proxy.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
EOF

4.2.7.启动服务并检查

[root@node1 bin]# supervisorctl update
[root@node1 bin]# supervisorctl status
[root@node1 bin]# yum install ipvsadm -y
[root@node1 bin]# ipvsadm -Ln
[root@node1 bin]# kubectl get svc

4.2.8.部署所有节点

不同的地方
/opt/kubernetes/server/bin/kube-proxy.sh
–hostname-override
##########
/etc/supervisord.d/kube-proxy.ini
[program:kube-proxy-7-120]

5.验证kubernetes集群

5.1.在任意主一个节点上创建一个资源配置清单

[root@master k8s-yaml]#cat > 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.od.com/public/nginx:v1.7.9
ports:
- containerPort: 80
EOF

5.2.应用资源配置，并检查

5.2.1.master.host.com上

[root@master ~]# kubectl create -f /root/ k8s-yaml/nginx-ds.yaml
[root@master ~]# kubectl get pods
[root@master ~]# kubectl get pods -o wide

5.2.2.查看kubernetes是否搭建好

[root@master ~]# kubectl get cs
[root@master ~]# kubectl get node
[root@master ~]# kubectl get pods

三、kubernetes的CNI网络插件-Flannel

6.1 部署机器

主机名	角色	IP地址
master	Flannel	192.168.210.119
node1	Flannel	192.168.210.120
node2	Flannel	192.168.210.121

部署方法以master.host.com为例

6.1.1 下载软件，解压，做软链接

[root@master ~]# wget https://github.com/coreos/flannel/releases/download/v0.11.0/flannel-v0.11.0-linux-amd64.tar.gz

[root@master ~]# mkdir /opt/flannel-v0.11.0
[root@master ~]# tar xf flannel-v0.11.0-linux-amd64.tar.gz -C /opt/flannel-v0.11.0/
[root@master ~]# ln -s /opt/flannel-v0.11.0/ /opt/flannel

6.1.2.创建目录

[root@master src]# /opt/flannel
[root@master flannel]# mkdir /opt/flannel/cert

6.1.3.拷贝证书文件

[root@master flannel]# cd cert
[root@master cert]# scp hdss7-200:/opt/certs/ca.pem .
[root@master cert]# scp hdss7-200:/opt/certs/client.pem .
[root@master cert]# scp hdss7-200:/opt/certs/client-key.pem .

6.1.4.创建配置

[root@master cert]# cd …
[root@master flannel]# vi subnet.env
FLANNEL_NETWORK=172.7.0.0/16
FLANNEL_SUBNET=172.7.119.1/24
FLANNEL_MTU=1500
FLANNEL_IPMASQ=false

6.1.5.创建启动脚本

[root@master flannel]# vi flanneld.sh
#!/bin/sh
./flanneld
–public-ip=10.4.7.21
–etcd-endpoints=https://10.4.7.12:2379,https://10.4.7.21:2379,https://10.4.7.22:2379
–etcd-keyfile=./cert/client-key.pem
–etcd-certfile=./cert/client.pem
–etcd-cafile=./cert/ca.pem
–iface=eth0
–subnet-file=./subnet.env
–healthz-port=2401

6.1.6.授权和创建日志目录

[root@master flannel]# vi flanneld.sh
#!/bin/sh
./flanneld
–public-ip=10.4.7.21
–etcd-endpoints=https://10.4.7.12:2379,https://10.4.7.21:2379,https://10.4.7.22:2379
–etcd-keyfile=./cert/client-key.pem
–etcd-certfile=./cert/client.pem
–etcd-cafile=./cert/ca.pem
–iface=eth0
–subnet-file=./subnet.env
–healthz-port=2401

6.1.7.创建supervisor配置

[root@master flannel]# vi /etc/supervisord.d/flannel.ini
[program:flanneld-7-21]
command=/opt/flannel/flanneld.sh ; the program (relative uses PATH, can take args)
numprocs=1 ; number of processes copies to start (def 1)
directory=/opt/flannel ; 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/flanneld/flanneld.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 ; emit events on stdout writes (default false)

6.2.flannel host-gw模型（三选一）

[root@master etcd]# ./etcdctl set /coreos.com/network/config ‘{“Network”: “172.7.0.0/16”, “Backend”: {“Type”: “host-gw”}}’
{“Network”: “172.7.0.0/16”, “Backend”: {“Type”: “host-gw”}}
验证：
[root@master etcd]# ./etcdctl get /coreos.com/network/config
{“Network”: “172.7.0.0/16”, “Backend”: {“Type”: “host-gw”}}

6.3.启动服务并检查

[root@master flannel]# supervisorctl update
[root@master flannel]# supervisorctl status

6.4.flannel vxlan模型（三选一）

1.supervisor stop flanneld-7-[21.22]
2.删除host-gw模型创建的路由
route del -net 172.7.21.0/24 gw 10.4.7.21 hdss7-22.host.com上
route del -net 172.7.22.0/24 gw 10.4.7.22 hdss7-21.host.com上
3.在etcd修改
./etcdctl get /coreos.com/network/config
./etcdctl rm /coreos.com/network/config
./etcdctl set /coreos.com/network/config ‘{“Network”: “172.7.0.0/16”, “Backend”: {“Type”: “VxLAN”}}’
4.supervisor start flanneld-7-[21.22]

6.5.flannel 直接路由模型（三选一）

‘{“Network”: “172.7.0.0/16”, “Backend”: {“Type”: “VxLAN”,“Directrouting”: true}}’

6.6.iptables规则

6.6.1.安装iptables-services并设置开机启动

[root@master ~]# yum install iptables-services -y
[root@master ~]# systemctl start iptables
[root@master ~]# systemctl enable iptables

6.6.2.优化各运算节点的SNAT规则

[root@master ~]# iptables -t nat -D POSTROUTING -s 172.7.21.0/24 ! -o docker0 -j MASQUERADE
[root@master ~]# iptables -t nat -I POSTROUTING -s 172.7.21.0/24 ! -d 172.7.0.0/16 ! -o docker0 -j MASQUERADE

6.6.3.各运算节点保存iptables规则

[root@master ~]# service iptables save

四 kubectl命令自动补全功能

1 安装bash-completion

yum install -y bash-completion
source /usr/share/bash-completion/bash_completion

2 应用kubectl的completion到系统环境

source <(kubectl completion bash)
echo “source <(kubectl completion bash)” >> ~/.bashrc
source ~/.bashrc

kubernetes 二进制部署

文章目录

一、kubernetes的五个组件

1. master节点的三个组件

1.1 kube-apiserver

1.2 kube-controller-manager

1.3 kube-scheduler

2 node节点的两个组件

2.1 kubelet

2.2 kube-proxy

二、kubernetes 部署

1机器环境

2 系统设置

2.1 系统设置

2.1.1 设置主机名

2.1.2 关闭防火墙和selinux

2.1.3 设置网卡

2.1.4 设置yum源

2.1.5 安装常用工具

2.1.6 同步系统时间

2.1.7 添加hosts

2.2 安装bind服务

2.2.1 安装bind 9

2.2.2 配置bind 9

2.2.3 检查配置并启动bind 9

2.2.5 配置DNS客户端

2.2.6.检查

2.3 准备签发证书环境

2.3.1 安装cfssl

2.3.2 创建生成ca证书csr的json配置文件

2.3.3.生成ca证书文件

2.4 部署docker

2.4.1 安装

2.4.3 启动

2.5 部署docker镜像私有仓库harbor

2.5.1.下载软件并解压

2.5.2.配置

2.5.3.安装docker-compose

2.5.4.安装harbor

2.5.5.检查harbor启动情况

2.5.6.配置harbor的dns内网解析

2.5.7.安装NGINX并配置

2.5.8.浏览器打开harbor.od.com并测试

2.5.9.检查

3 部署master节点

3.1.部署etcd集群

3.1.1 部署机器

3.1.2 创建基于根证书的config配置文件

3.1.3.创建生成自签发证书的csr的json配置文件

3.1.4.生成etcd证书文件

3.1.5.检查生成的证书文件

3.1.6.创建etcd用户

3.1.7.下载软件，解压，做软连接

3.1.8 创建目录，拷贝证书文件

3.1.9 创建etcd服务启动脚本

3.1.10 授权目录权限

3.1.11.安装supervisor软件

3.1.12 创建supervisor配置

3.1.13 启动etcd服务并检查

3.1.14 部署启动所有集群

3.1.15 检查集群状态

3.2 部署kube-apiserver集群

3.2.1 部署机器

3.2.2 下载软件，解压，做软连接

3.2.3.签发client证书

3.2.4.签发kube-apiserver证书

3.2.5.拷贝证书文件至各节点，并创建配置

3.2.6.创建apiserver启动脚本

3.2.7.授权和创建目录

3.2.8.创建supervisor配置

3.2.9.启动服务并检查

3.2.10.部署启动所有集群

3.3.部署四层反向代理

3.3.1 多节点部署keepalived

3.3.2.安装NGINX和keepalived

3.3.3.启动代理并检查

3.4.部署controller-manager

3.4.1 部署机器

3.4.2.创建启动脚本

3.4.3.授权文件权限，创建目录