@zhangyy
2020-03-15T14:06:46.000000Z
字数 5210
阅读 169
kubernetes系列
- 一. 系统环境的配置
- 二. vmware harbor 的安装测试
- 三. 发布一个测试nginx
192.168.100.11 node01.flyfish
192.168.100.12 node02.flyfish
192.168.100.13 node03.flyfish
192.168.100.14 node04.flyfish
192.168.100.15 node05.flyfish
192.168.100.16 node06.flyfish
系统节点全部执行:
systemctl stop firewalld && systemctl disable firewalld && yum -y install iptables-services && systemctl start iptables && systemctl enable iptables && iptables -F && service iptables save
关闭 SELINUX
swapoff -a && sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
setenforce 0 && sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config
全部节点安装
yum install -y conntrack ntpdate ntp ipvsadm ipset jq iptables curl sysstat libseccomp wget vim net-tools git
所有节点都执行
cat > kubernetes.conf <<EOF
net.bridge.bridge-nf-call-iptables=1
net.bridge.bridge-nf-call-ip6tables=1
net.ipv4.ip_forward=1
net.ipv4.tcp_tw_recycle=0
vm.swappiness=0 # 禁止使用 swap 空间,只有当系统 OOM 时才允许使用它 vm.overcommit_memory=1 # 不检查物理内存是否够用
vm.panic_on_oom=0 # 开启 OOM
fs.inotify.max_user_instances=8192
fs.inotify.max_user_watches=1048576
fs.file-max=52706963
fs.nr_open=52706963
net.ipv6.conf.all.disable_ipv6=1
net.netfilter.nf_conntrack_max=2310720
EOF
cp kubernetes.conf /etc/sysctl.d/kubernetes.conf
sysctl -p /etc/sysctl.d/kubernetes.conf
# 设置系统时区为 中国/上海 timedatectl set-timezone Asia/Shanghai
# 将当前的 UTC 时间写入硬件时钟 timedatectl set-local-rtc 0
# 重启依赖于系统时间的服务
systemctl restart rsyslog && systemctl restart crond
systemctl stop postfix && systemctl disable postfix
mkdir /var/log/journal # 持久化保存日志的目录
mkdir /etc/systemd/journald.conf.d
cat > /etc/systemd/journald.conf.d/99-prophet.conf <<EOF
[Journal]
# 持久化保存到磁盘
Storage=persistent
# 压缩历史日志
Compress=yes
SyncIntervalSec=5m
RateLimitInterval=30s
RateLimitBurst=1000
# 最大占用空间 10G
SystemMaxUse=10G
# 单日志文件最大 200M
SystemMaxFileSize=200M
# 日志保存时间 2 周
MaxRetentionSec=2week
# 不将日志转发到 syslog
ForwardToSyslog=no
EOF
systemctl restart systemd-journald
CentOS 7.x 系统自带的 3.10.x 内核存在一些 Bugs,导致运行的 Docker、Kubernetes 不稳定,例如: rpm -Uvh
http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
# 安装完成后检查 /boot/grub2/grub.cfg 中对应内核 menuentry 中是否包含 initrd16 配置,如果没有,再安装 一次!
yum --enablerepo=elrepo-kernel install -y kernel-lt
# 设置开机从新内核启动
grub2-set-default "CentOS Linux (4.4.182-1.el7.elrepo.x86_64) 7 (Core)"
reboot
# 重启后安装内核源文件
yum --enablerepo=elrepo-kernel install kernel-lt-devel-$(uname -r) kernel-lt-headers-$(uname -r)
modprobe br_netfilter
cat > /etc/sysconfig/modules/ipvs.modules <<EOF
#!/bin/bash
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- nf_conntrack_ipv4
EOF
chmod 755 /etc/sysconfig/modules/ipvs.modules
bash /etc/sysconfig/modules/ipvs.modules
lsmod | grep -e ip_vs -e nf_conntrack_ipv4
机器节点都执行:
yum install -y yum-utils device-mapper-persistent-data lvm2
yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://abcd1234.m.daocloud.io
yum update -y && yum install docker-ce-18.09.9 docker-ce-cli-18.09.9 containerd.io -y
重启机器: reboot
查看内核版本: uname -r
在加载: grub2-set-default "CentOS Linux (4.4.182-1.el7.elrepo.x86_64) 7 (Core)" && reboot
如果还不行
就改 文件 : vim /etc/grub2.cfg 注释掉 3.10 的 内核
保证 内核的版本 为 4.4
service docker start
chkconfig docker on
## 创建 /etc/docker 目录
mkdir /etc/docker
# 配置 daemon.
cat > /etc/docker/daemon.json <<EOF
{
"exec-opts": ["native.cgroupdriver=systemd"],
"log-driver": "json-file",
"log-opts": {
"max-size": "100m"
},
"insecure-registries": ["https://node04.flyfish"],
"registry-mirrors": ["https://registry.docker-cn.com","http://hub-mirror.c.163.com"]
}
EOF
mkdir -p /etc/systemd/system/docker.service.d
# 重启docker服务
systemctl daemon-reload && systemctl restart docker && systemctl enable docker
上传: docker-compose 与harbor-offline-installer-v1.2.0.tgz
mv docker-compose /usr/bin/
chmod +x /usr/bin/docker-compose
tar -zxvf harbor-offline-installer-v1.2.0.tgz
mv harbor /usr/local/
cd /usr/local/harbor/
vim harbor.cfg
---
hostname node04.flyfish
---
mkdir -p /data/cert/
创创建建 https 证证书书以以及及配配置置相相关关目目录录权权限限
cd /data/cert/
创建私钥:
openssl genrsa -des3 -out server.key 2048
openssl req -new -key server.key -out server.csr
cp server.key server.key.org
openssl rsa -in server.key.org -out server.key
openssl x509 -req -days 365 -in server.csr -signkey server.key -out server.crt
chmod 777 -R *
cd /usr/local/harbor/
./install.sh
登陆用户名密码:
admin
Harbor12345
查看harbor 是否能用docker 登陆
docker login https://node04.flyfish
用户名: admin
密码: Harbor12345
docker pull wangyanglinux/myapp:v1
docker pull wodby/nginx
docker tag wodby/nginx node04.flyfish/library/wodby/nginx:v1
docker push node04.flyfish/library/wodby/nginx:v1
docker tag wangyanglinux/myapp:v1 node04.flyfish/library/myapp:v1
docker push node04.flyfish/library/myapp:v1
删掉原来的镜像
docker rmi -f wangyanglinux/myapp:v1
docker rmi -f node04.flyfish/library/myapp:v1
docker rmi -f wodby/nginx
docker rmi -f node04.flyfish/library/wodby/nginx:v1
测试从仓库(vmware harbor)创建一个pod测试
kubectl run nginx-deployment --image=node04.flyfish/library/myapp:v1 --port 80 --replicas=1
kubectl get pods
kubectl get deploy,rs
副本扩容:
kubectl get deploy
kubectl scale --replicas=3 deploy/nginx-deployment
暴露端口访问
kubectl expose deployment nginx-deployment --port=3000 --target-port=80
kubectl get svc
kubectl get pods -o wide
kubectl edit svc nginx-deployment
---
修改TYPE 类型 clusterIP 变为:NodePort
---
kubectl get pod svc,pods -o wide
从外网访问:
node02.flyfish:30789
node03.flyfish:30789