替换yum源
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
yum clean all
yum makecache
yum -y update
安装docker
wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo -O /etc/yum.repos.d/docker-ce.repo
yum -y install docker-ce-19.03.8-3.el7
yum update xfsprogs -y
rm -rf /etc/docker/daemon.json
vi /etc/docker/daemon.json
{
"exec-opts": ["native.cgroupdriver=systemd"],
"registry-mirrors": [
"https://1nj0zren.mirror.aliyuncs.com",
"https://kfwkfulq.mirror.aliyuncs.com",
"https://2lqq34jg.mirror.aliyuncs.com",
"https://pee6w651.mirror.aliyuncs.com",
"http://hub-mirror.c.163.com",
"https://docker.mirrors.ustc.edu.cn",
"http://f1361db2.m.daocloud.io",
"https://registry.docker-cn.com"
]
}
重启
systemctl daemon-reload
systemctl restart docker
查看docker日志
dockerd
安装k8s
docker pull registry.aliyuncs.com/google_containers/kube-proxy:v1.19.0
docker pull registry.aliyuncs.com/google_containers/kube-apiserver:v1.19.0
docker pull registry.aliyuncs.com/google_containers/kube-controller-manager:v1.19.0
docker pull registry.aliyuncs.com/google_containers/kube-scheduler:v1.19.0
docker pull registry.aliyuncs.com/google_containers/etcd:3.4.9-1
docker pull registry.aliyuncs.com/google_containers/coredns:1.7.0
docker pull registry.aliyuncs.com/google_containers/pause:3.2
systemctl stop firewalld && systemctl disable firewalld
swapoff -a && sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab
setenforce 0 && sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/selinux/config
yum -y install ntpdate
ntpdate time.windows.com
hwclock --systohc
cat > /etc/sysctl.d/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system
cat > /etc/yum.repos.d/kubernetes.repo << EOF
[kubernetes]
name=Kubernetes
baseurl=https://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=https://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg https://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF
yum remove -y kubelet-1.19.0 kubeadm-1.19.0 kubectl-1.19.0
yum install -y kubelet-1.19.0 kubeadm-1.19.0 kubectl-1.19.0
systemctl enable kubelet
修改配置文件
/usr/lib/systemd/system/kubelet.service.d/10-kubeadm.conf
ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_CONFIG_ARGS $KUBELET_KUBEADM_ARGS $KUBELET_EXTRA_ARGS --feature-gates SupportPodPidsLimit=false --feature-gates SupportNodePidsLimit=false
systemctl daemon-reload
systemctl restart docker
systemctl restart kubelet
kubeadm init --kubernetes-version=1.19.0 \
--apiserver-advertise-address=$(ifconfig | grep eno -A 1 | grep inet | awk '{ print $2 }') \
--image-repository=registry.aliyuncs.com/google_containers \
--service-cidr=10.1.0.0/16 \
--pod-network-cidr=10.244.0.0/16 \
--ignore-preflight-errors=all \
--v=5
kubeadm join --token 7q9hvo.e65aim12as1a0v98 --discovery-token-ca-cert-hash sha256:76e68e8ac68af391e3f406a5ea451ea44b0f67a63ac44754a43f8e483d613e14 192.168.116.27:6443
--ignore-preflight-errors=all
安装flannel
wget https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
kubectl apply -f kube-flannel.yml
kubectl get pods -n kube-system
去除污点
kubectl describe node localhost.localdomain | grep Taints
kubectl taint nodes localhost.localdomain node.kubernetes.io/not-ready:NoSchedule-
[root@localhost k8s]
NAME STATUS ROLES AGE VERSION
localhost.localdomain Ready master 49m v1.19.0
[root@localhost k8s]
NAMESPACE NAME READY STATUS RESTARTS AGE
default nginx1-6978dd5678-66wc7 1/1 Running 0 15m
kube-flannel kube-flannel-ds-rvdqq 1/1 Running 1 29m
kube-system coredns-6d56c8448f-mcbkv 1/1 Running 0 28m
kube-system coredns-6d56c8448f-z49bb 1/1 Running 0 41m
kube-system etcd-localhost.localdomain 1/1 Running 1 41m
kube-system kube-apiserver-localhost.localdomain 1/1 Running 2 41m
kube-system kube-controller-manager-localhost.localdomain 1/1 Running 3 41m
kube-system kube-proxy-jcbcq 1/1 Running 1 41m
kube-system kube-scheduler-localhost.localdomain 1/1 Running 3 41m
[root@localhost k8s]
grpc服务demo
// protoc --go_out=plugins=grpc:. demo.proto
syntax = "proto3";
package demo;
option go_package = "demo";
service demo {
rpc hello(helloReq) returns(helloResp);
}
message helloReq {
string req=1;
}
message helloResp {
string msg=1;
}
package main
import (
"context"
"flag"
"fmt"
pb "gg/demo"
"log"
"net"
"os"
"google.golang.org/grpc"
"google.golang.org/grpc/reflection"
)
type server struct {
}
var (
listen = flag.String("listen", "listen", ":80")
)
func main() {
flag.Parse()
fmt.Println(os.Args)
s := grpc.NewServer()
pb.RegisterDemoServer(s, &server{})
reflection.Register(s)
l, err := net.Listen("tcp", *listen)
if err != nil {
log.Printf("Failed to listen %s, err %v", *listen, err)
return
}
log.Println("server run")
s.Serve(l)
}
func (s *server) Hello(ctx context.Context, in *pb.HelloReq) (*pb.HelloResp, error) {
log.Printf("Hello req:%+v", in)
return &pb.HelloResp{Msg: in.Req}, nil
}
编写dockerfile
FROM ubuntu
ADD ./main /
EXPOSE 80
EXPOSE 8078
打包生成镜像
docker build -t helloworld:1.0 .
deploy & svc
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: helloworld
name: helloworld
spec:
replicas: 1
selector:
matchLabels:
app: helloworld
template:
metadata:
labels:
app: helloworld
spec:
containers:
- image: helloworld:1.0
imagePullPolicy: Never
name: helloworld
command:
- /main
- --listen=:80
apiVersion: v1
kind: Service
metadata:
labels:
app: helloworld
name: helloworld
spec:
selector:
app: helloworld
ports:
- name: http-admin
port: 8078
protocol: TCP
targetPort: 8078
- name: grpc
port: 80
protocol: TCP
targetPort: 80
测试
[root@localhost ~]
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
helloworld ClusterIP 10.1.173.212 <none> 8078/TCP,80/TCP 58s
kubernetes ClusterIP 10.1.0.1 <none> 443/TCP 4h42m
[root@localhost ~]
{
"msg": "aa"
}
[root@localhost ~]
NAME READY STATUS RESTARTS AGE
helloworld-6fcfff47d5-srdsr 1/1 Running 0 5m31s
nginx1-6978dd5678-66wc7 1/1 Running 1 4h2m
[root@localhost ~]
[/main --listen=:80]
2024/04/04 13:56:54 server run
2024/04/04 14:01:37 Hello req:req:"aa"
2024/04/04 14:02:17 Hello req:req:"aa"
