ecs上搭建minikube

操作系统版本:centos-8.2

docker版本:20.10.17

minikube版本:v1.26.1

kubernetes版本: v1.24.3

安装docker

sudo yum remove docker docker-common docker-selinux docker-engine
sudo yum install -y yum-utils device-mapper-persistent-data lvm2
wget -O /etc/yum.repos.d/docker-ce.repo https://repo.huaweicloud.com/docker-ce/linux/centos/docker-ce.repo
sudo yum makecache fast
sudo yum -y install docker-ce
#启动docker
systemctl enable docker --now
#验证版本
docker version

配置自己的镜像加速器,也可以使用下面的配置

# docker加速配置
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
  "registry-mirrors": ["https://ke9h1pt4.mirror.aliyuncs.com"]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

下载minikube

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
sudo install minikube-linux-amd64 /usr/local/bin/minikube

启动minikube

启动minikube start之前有这个选项参数应该注意:

--base-image string The base image to use for docker/podman drivers. Intended for local development. (default "gcr.io/k8s-minikube/kicbase-builds:v0.0.33-1659486857-14721@sha256:98c8007234ca882b63abc707dc184c585fcb5372828b49a4b639961324d291b3")

--binary-mirror string Location to fetch kubectl, kubelet, & kubeadm binaries from.

--image-mirror-country string Country code of the image mirror to be used. Leave empty to use the global one. For Chinese mainland users, set it to cn.

--image-repository string Alternative image repository to pull docker images from. This can be used when you have limited access to gcr.io. Set it to "auto" to let minikube decide one for you. For Chinese mainland users, you may use local gcr.io mirrors such as registry.cn-hangzhou.aliyuncs.com/google_containers

--registry-mirror strings Registry mirrors to pass to the Docker daemon

执行:

注意:建议在普通用户下安装

$ minikube start \
--image-mirror-country=cn \
--image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers

[root@VM-4-9-centos ~]#  minikube start \
> --image-mirror-country=cn \
> --image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers
😄  minikube v1.26.1 on Centos 8.2.2004 (amd64)
✨  Automatically selected the docker driver. Other choices: ssh, none
🛑  The "docker" driver should not be used with root privileges. If you wish to continue as root, use --force.
💡  If you are running minikube within a VM, consider using --driver=none:
📘    https://minikube.sigs.k8s.io/docs/reference/drivers/none/

❌  Exiting due to DRV_AS_ROOT: The "docker" driver should not be used with root privileges.

在root用户下安装时,可以考虑加上--force选项:

再次执行:

[root@VM-4-9-centos ~]# minikube start --force --image-mirror-country=cn --image-repository=registry.cn-hangzhou.aliyuncs.com/google_containers
😄  minikube v1.26.1 on Centos 8.2.2004 (amd64)
❗  minikube skips various validations when --force is supplied; this may lead to unexpected behavior
✨  Using the docker driver based on existing profile
🛑  The "docker" driver should not be used with root privileges. If you wish to continue as root, use --force.
💡  If you are running minikube within a VM, consider using --driver=none:
📘    https://minikube.sigs.k8s.io/docs/reference/drivers/none/
💡  Tip: To remove this root owned cluster, run: sudo minikube delete
👍  Starting control plane node minikube in cluster minikube
🚜  Pulling base image ...
🏃  Updating the running docker "minikube" container ...
🐳  Preparing Kubernetes v1.24.3 on Docker 20.10.17 ...
🔎  Verifying Kubernetes components...
    ▪ Using image registry.cn-hangzhou.aliyuncs.com/google_containers/storage-provisioner:v5
🌟  Enabled addons: storage-provisioner, default-storageclass
💡  kubectl not found. If you need it, try: 'minikube kubectl -- get pods -A'
🏄  Done! kubectl is now configured to use "minikube" cluster and "default" namespace by default

如果在安装过程中,出现问题,可以查看安装日志

$ minikube logs

为了后续方便使用kubectl,可以设置别名,添加到.bashrc中,这个

alias kubectl="minikube kubectl --"

不过这种并不好用,尤其是在operator开发过程中,会总是提示找不到kubectl。

为了后续方便还是建议直接安装一个kubectl吧。

安装kubectl

配置yum源:

#配置k8s的yum源地址,这里指定为阿里云的yum源
cat <<EOF | sudo tee -a /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
   http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

安装kubectl(由于上面安装了kubernets版本为1.24.3,所以这里保持一致):

yum -y install kubectl-1.24.3

基本操作

查看POD:

$ kubectl get po -A
NAMESPACE     NAME                               READY   STATUS    RESTARTS        AGE
kube-system   coredns-7f74c56694-227v8           1/1     Running   0               6m16s
kube-system   etcd-minikube                      1/1     Running   3 (6m36s ago)   7m20s
kube-system   kube-apiserver-minikube            1/1     Running   3 (6m36s ago)   7m10s
kube-system   kube-controller-manager-minikube   1/1     Running   3 (6m36s ago)   7m1s
kube-system   kube-proxy-vk786                   1/1     Running   0               6m16s
kube-system   kube-scheduler-minikube            1/1     Running   2 (6m36s ago)   7m4s
kube-system   storage-provisioner                1/1     Running   1 (5m55s ago)   6m26s

安装dashboard

安装dashboard

$ minikube dashboard --url
🔌  Enabling dashboard ...
    ▪ Using image registry.cn-hangzhou.aliyuncs.com/google_containers/metrics-scraper:v1.0.8
    ▪ Using image registry.cn-hangzhou.aliyuncs.com/google_containers/dashboard:v2.6.0
🤔  Verifying dashboard health ...
🚀  Launching proxy ...
🤔  Verifying proxy health ...
http://127.0.0.1:37777/api/v1/namespaces/kubernetes-dashboard/services/http:kubernetes-dashboard:/proxy/

但是这个URL只能在宿主机内部访问,但是我们宿主机是一台ECS,上面给出的地址,在宿主机之外无法直接访问。

我们使用kubectl proxy重新做一下代理即可。

$ kubectl proxy --address='0.0.0.0'  --accept-hosts='^*$'

注意:

1、 在ECS上需要添加防火墙规则,允许8001端口流量通行。

2、也可以使用其他方式来实现ECS外访问,如ingress+nginx方式。

在宿主机外部访问:http://127.0.0.1:8001/api/v1/namespaces/kubernetes-dashboard/services/http:kubernetes-dashboard:/proxy/

如果想要卸载dashboard,操作如下:

$ minikube addons disable dashboard

Minikube 也提供了丰富的 Addon 组件

$ minikube addons list
|-----------------------------|--------------------------------|
|         ADDON NAME          |           MAINTAINER           |
|-----------------------------|--------------------------------|
| ambassador                  | 3rd party (Ambassador)         |
| auto-pause                  | Google                         |
| csi-hostpath-driver         | Kubernetes                     |
| dashboard                   | Kubernetes                     |
| default-storageclass        | Kubernetes                     |
| efk                         | 3rd party (Elastic)            |
| freshpod                    | Google                         |
| gcp-auth                    | Google                         |
| gvisor                      | Google                         |
| headlamp                    | 3rd party (kinvolk.io)         |
| helm-tiller                 | 3rd party (Helm)               |
| inaccel                     | 3rd party (InAccel             |
|                             | [info@inaccel.com])            |
| ingress                     | Kubernetes                     |
| ingress-dns                 | Google                         |
| istio                       | 3rd party (Istio)              |
| istio-provisioner           | 3rd party (Istio)              |
| kong                        | 3rd party (Kong HQ)            |
| kubevirt                    | 3rd party (KubeVirt)           |
| logviewer                   | 3rd party (unknown)            |
| metallb                     | 3rd party (MetalLB)            |
| metrics-server              | Kubernetes                     |
| nvidia-driver-installer     | Google                         |
| nvidia-gpu-device-plugin    | 3rd party (Nvidia)             |
| olm                         | 3rd party (Operator Framework) |
| pod-security-policy         | 3rd party (unknown)            |
| portainer                   | 3rd party (Portainer.io)       |
| registry                    | Google                         |
| registry-aliases            | 3rd party (unknown)            |
| registry-creds              | 3rd party (UPMC Enterprises)   |
| storage-provisioner         | Google                         |
| storage-provisioner-gluster | 3rd party (Gluster)            |
| volumesnapshots             | Kubernetes                     |
|-----------------------------|--------------------------------|

安装Ingress

$ minikube addons enable ingress

这里安装的实际上是ingress controller,它会持续监控APIServer的/ingress接口(即用户定义的到后端服务的转发规则)的变化。当/ingress接口后端的服务信息发生变化时,IngressController会自动更新其转发规则。

使用Ingress进行服务路由时,Ingress Controller基于Ingress规则将客户端请求直接转发到Service对应的后端Endpoint(Pod)上,这样会跳过kube-proxy设置的路由转发规则,以提高网络转发效率。

Kubernetes使用了一个Ingress策略定义和一个具体提供转发服务的Ingress Controller,两者结合,实现了基于灵活Ingress策略定义的服务路由功能。如果是对Kubernetes集群外部的客户端提供服务,那么Ingress Controller实现的是类似于边缘路由器(EdgeRouter)的功能。

默认是安装到“ingress-nginx”命名空间下:

$ kubectl get all -n ingress-nginx
NAME                                            READY   STATUS      RESTARTS   AGE
pod/ingress-nginx-admission-create-qhmzt        0/1     Completed   0          32m
pod/ingress-nginx-admission-patch-zkbnb         0/1     Completed   1          32m
pod/ingress-nginx-controller-5b486bcc4b-2tlzk   1/1     Running     0          32m

NAME                                         TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)                      AGE
service/ingress-nginx-controller             NodePort    10.97.194.74   <none>        80:32760/TCP,443:30787/TCP   32m
service/ingress-nginx-controller-admission   ClusterIP   10.105.64.43   <none>        443/TCP                      32m

NAME                                       READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/ingress-nginx-controller   1/1     1            1           32m

NAME                                                  DESIRED   CURRENT   READY   AGE
replicaset.apps/ingress-nginx-controller-5b486bcc4b   1         1         1       32m

NAME                                       COMPLETIONS   DURATION   AGE
job.batch/ingress-nginx-admission-create   1/1           7s         32m
job.batch/ingress-nginx-admission-patch    1/1           8s         32m

该控制器是以deploy方式部署的,实际上以daemonset方式部署更为常见。它创建了对应的deploy和service。

查看POD信息:

$ kubectl get pods -n ingress-nginx -owide
NAME                                        READY   STATUS      RESTARTS   AGE   IP            NODE       NOMINATED NODE   READINESS GATES
ingress-nginx-admission-create-qhmzt        0/1     Completed   0          34m   172.17.0.13   minikube   <none>           <none>
ingress-nginx-admission-patch-zkbnb         0/1     Completed   1          34m   172.17.0.12   minikube   <none>           <none>
ingress-nginx-controller-5b486bcc4b-2tlzk   1/1     Running     0          34m   172.17.0.9    minikube   <none>           <none>

查看Ingressclass:

$ kubectl get ingressclass
NAME    CONTROLLER             PARAMETERS   AGE
nginx   k8s.io/ingress-nginx   <none>       8h

默认创建了一个名为nginx的ingressclass,控制器为k8s.io/ingress-nginx

查看“service/ingress-nginx-controller

$ kubectl describe service/ingress-nginx-controller  -n ingress-nginx
Name:                     ingress-nginx-controller
Namespace:                ingress-nginx
Labels:                   app.kubernetes.io/component=controller
                          app.kubernetes.io/instance=ingress-nginx
                          app.kubernetes.io/name=ingress-nginx
Annotations:              <none>
Selector:                 app.kubernetes.io/component=controller,app.kubernetes.io/instance=ingress-nginx,app.kubernetes.io/name=ingress-nginx
Type:                     NodePort
IP Family Policy:         SingleStack
IP Families:              IPv4
IP:                       10.97.194.74
IPs:                      10.97.194.74
Port:                     http  80/TCP
TargetPort:               http/TCP
NodePort:                 http  32760/TCP
Endpoints:                172.17.0.9:80
Port:                     https  443/TCP
TargetPort:               https/TCP
NodePort:                 https  30787/TCP
Endpoints:                172.17.0.9:443
Session Affinity:         None
External Traffic Policy:  Cluster
Events:                   <none>

尝试访问:

root@minikube:/# curl localhost:80  
<html>
<head><title>404 Not Found</title></head>
<body>
<center><h1>404 Not Found</h1></center>
<hr><center>nginx</center>
</body>
</html>
root@minikube:/# 

上面我们安装了dashboard后,在ECS外部访问时,采用的kube proxy方式。实际上我们还可以采用ingress+nginx方式来实现。

创建Ingress

查看dashboard service

$ kubectl get svc -n kubernetes-dashboard
NAME                        TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)    AGE
dashboard-metrics-scraper   ClusterIP   10.96.116.15    <none>        8000/TCP   12d
kubernetes-dashboard        ClusterIP   10.104.80.205   <none>        80/TCP     12d

创建ingress,

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: kubernetes-dashboard
  namespace: kubernetes-dashboard
spec:
  rules:
  - host: kubernetes-dashboard.org
    http:
      paths:
      - path: /
        pathType: ImplementationSpecific
        backend:
          service:
            name: kubernetes-dashboard
            port:
              number: 80

注:

  • host 自定义
  • service.name为dashboard service的名称,
  • service.port为dashboard service端口

 

登录一个nginx-ingress-controller Pod,在/etc/nginx/(或/etc/nginx/conf.d)目录下可以查看其生成的内容,可以看到对kubernetes-dashboard.org的转发规则的配置:

$ kubectl exec -it ingress-nginx-controller-5b486bcc4b-2tlzk -n ingress-nginx  -- cat /etc/nginx/nginx.conf

...
	## start server kubernetes-dashboard.org
	server {
		server_name kubernetes-dashboard.org ;
		
		listen 80  ;
		listen 443  ssl http2 ;
		
		set $proxy_upstream_name "-";
		
		ssl_certificate_by_lua_block {
			certificate.call()
		}
		
		location / {
			
			set $namespace      "kubernetes-dashboard";
			set $ingress_name   "kubernetes-dashboard";
			set $service_name   "kubernetes-dashboard";
			set $service_port   "80";
			set $location_path  "/";
			set $global_rate_limit_exceeding n;
			
			rewrite_by_lua_block {
				lua_ingress.rewrite({
					force_ssl_redirect = false,
					ssl_redirect = true,
					force_no_ssl_redirect = false,
					preserve_trailing_slash = false,
					use_port_in_redirects = false,
					global_throttle = { namespace = "", limit = 0, window_size = 0, key = { }, ignored_cidrs = { } },
				})
				balancer.rewrite()
				plugins.run()
			}
			
			# be careful with `access_by_lua_block` and `satisfy any` directives as satisfy any
			# will always succeed when there's `access_by_lua_block` that does not have any lua code doing `ngx.exit(ngx.DECLINED)`
			# other authentication method such as basic auth or external auth useless - all requests will be allowed.
			#access_by_lua_block {
			#}
			
			header_filter_by_lua_block {
				lua_ingress.header()
				plugins.run()
			}
			
			body_filter_by_lua_block {
				plugins.run()
			}
			
			log_by_lua_block {
				balancer.log()
				
				monitor.call()
				
				plugins.run()
			}
			
			port_in_redirect off;
			
			set $balancer_ewma_score -1;
			set $proxy_upstream_name "kubernetes-dashboard-kubernetes-dashboard-80";
			set $proxy_host          $proxy_upstream_name;
			set $pass_access_scheme  $scheme;
			
			set $pass_server_port    $server_port;
			
			set $best_http_host      $http_host;
			set $pass_port           $pass_server_port;
			
			set $proxy_alternative_upstream_name "";
			
			client_max_body_size                    1m;
			
			proxy_set_header Host                   $best_http_host;
			
			# Pass the extracted client certificate to the backend
			
			# Allow websocket connections
			proxy_set_header                        Upgrade           $http_upgrade;
			
			proxy_set_header                        Connection        $connection_upgrade;
			
			proxy_set_header X-Request-ID           $req_id;
			proxy_set_header X-Real-IP              $remote_addr;
			
			proxy_set_header X-Forwarded-For        $remote_addr;
			
			proxy_set_header X-Forwarded-Host       $best_http_host;
			proxy_set_header X-Forwarded-Port       $pass_port;
			proxy_set_header X-Forwarded-Proto      $pass_access_scheme;
			proxy_set_header X-Forwarded-Scheme     $pass_access_scheme;
			
			proxy_set_header X-Scheme               $pass_access_scheme;
			
			# Pass the original X-Forwarded-For
			proxy_set_header X-Original-Forwarded-For $http_x_forwarded_for;
			
			# mitigate HTTPoxy Vulnerability
			# https://www.nginx.com/blog/mitigating-the-httpoxy-vulnerability-with-nginx/
			proxy_set_header Proxy                  "";
			
			# Custom headers to proxied server
			
			proxy_connect_timeout                   5s;
			proxy_send_timeout                      60s;
			proxy_read_timeout                      60s;
			
			proxy_buffering                         off;
			proxy_buffer_size                       4k;
			proxy_buffers                           4 4k;
			
			proxy_max_temp_file_size                1024m;
			
			proxy_request_buffering                 on;
			proxy_http_version                      1.1;
			
			proxy_cookie_domain                     off;
			proxy_cookie_path                       off;
			
			# In case of errors try the next upstream server before returning an error
			proxy_next_upstream                     error timeout;
			proxy_next_upstream_timeout             0;
			proxy_next_upstream_tries               3;
			
			proxy_pass http://upstream_balancer;
			
			proxy_redirect                          off;
			
		}
		
	}
	## end server kubernetes-dashboard.org

...

我们的所配置的Ingress创建成功后,Ingress Controller就会监控到其配置的路由策略,并更新到Nginx的配置文件中生效。

 

在宿主机上安装和配置nginx

安装nginx:

$ yum -y install nginx

nginx设置代理,修改宿主机:/etc/nginx/conf.d/nginx.conf

server {
  listen       8080;
  server_name  kubernetes-dashboard.org;
  location / {
    proxy_pass http://kubernetes-dashboard.org;
  }
}

为宿主机添加域名映射:

echo $(minikube ip) kubernetes-dashboard.org |sudo tee -a  /etc/hosts 

在宿主机上试一下,能够正常访问

$ curl kubernetes-dashboard.org
<!--
Copyright 2017 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
--><!DOCTYPE html><html lang="en" dir="ltr"><head>
  <meta charset="utf-8">
  <title>Kubernetes Dashboard</title>
  <link rel="icon" type="image/png" href="assets/images/kubernetes-logo.png">
  <meta name="viewport" content="width=device-width">
<style>html,body{height:100%;margin:0}*::-webkit-scrollbar{background:transparent;height:8px;width:8px}</style><link rel="stylesheet" href="styles.243e6d874431c8e8.css" media="print" onload="this.media='all'"><noscript><link rel="stylesheet" href="styles.243e6d874431c8e8.css"></noscript></head>

<body>
  <kd-root></kd-root>
<script src="runtime.4e6659debd894e59.js" type="module"></script><script src="polyfills.5c84b93f78682d4f.js" type="module"></script><script src="scripts.2c4f58d7c579cacb.js" defer></script><script src="en.main.0d231cb1cda9c4cf.js" type="module"></script>


</body></html>

在宿主机之外浏览器访问:http://弹性公网IP:8080/#/workloads?namespace=default

 

 

其他说明

查看docker进程,能够发现,minikube就是运行在宿主机上的一个docker进程

$ docker ps
CONTAINER ID   IMAGE                                                                 COMMAND                  CREATED       STATUS       PORTS                                                                                                                                  NAMES
b85acc8f48b0   registry.cn-hangzhou.aliyuncs.com/google_containers/kicbase:v0.0.33   "/usr/local/bin/entr…"   9 hours ago   Up 9 hours   127.0.0.1:49157->22/tcp, 127.0.0.1:49156->2376/tcp, 127.0.0.1:49155->5000/tcp, 127.0.0.1:49154->8443/tcp, 127.0.0.1:49153->32443/tcp   minikube

其中做了些端口映射:

$ docker inspect minikube
...
 "Ports": {
     "22/tcp": [
         {
             "HostIp": "127.0.0.1",
             "HostPort": "49157"
         }
     ],
     "2376/tcp": [
         {
             "HostIp": "127.0.0.1",
             "HostPort": "49156"
         }
     ],
     "32443/tcp": [
         {
             "HostIp": "127.0.0.1",
             "HostPort": "49153"
         }
     ],
     "5000/tcp": [
         {
             "HostIp": "127.0.0.1",
             "HostPort": "49155"
         }
     ],
     "8443/tcp": [
         {
             "HostIp": "127.0.0.1",
             "HostPort": "49154"
         }
     ]
 },
...

minikube的配置文件保持保存在用户的家目录.minikube下,我们可以简单看下

$ tree .minikube/
.minikube/
├── addons
├── cache
│   ├── images
│   │   └── amd64
│   │       └── registry.cn-hangzhou.aliyuncs.com #这里保存了一些下载到的kubernetes组件镜像
│   │           └── google_containers
│   │               ├── coredns_v1.8.6
│   │               ├── etcd_3.5.3-0
│   │               ├── kube-apiserver_v1.24.3
│   │               ├── kube-controller-manager_v1.24.3
│   │               ├── kube-proxy_v1.24.3
│   │               ├── kube-scheduler_v1.24.3
│   │               ├── pause_3.7
│   │               └── storage-provisioner_v5
│   ├── kic
│   │   └── amd64 #这里是主要镜像
│   │       └── kicbase_v0.0.33@sha256_73b259e144d926189cf169ae5b46bbec4e08e4e2f2bd87296054c3244f70feb8.tar
│   └── linux
│       └── amd64
│           └── v1.24.3 #这里是另外一些kubernetes组件,上面我们通过yum安装kubectl,实际上也可以直接使用它
│               ├── kubeadm
│               ├── kubectl
│               └── kubelet
├── ca.crt
├── ca.key
├── ca.pem
├── cert.pem
├── certs
│   ├── ca-key.pem
│   ├── ca.pem
│   ├── cert.pem
│   └── key.pem
├── config
├── files
├── key.pem
├── logs
│   ├── audit.json
│   └── lastStart.txt
├── machine_client.lock
├── machines
│   ├── minikube
│   │   ├── config.json
│   │   ├── id_rsa
│   │   └── id_rsa.pub
│   ├── server-key.pem
│   └── server.pem
├── profiles
│   └── minikube #保存了一些认证证书
│       ├── apiserver.crt
│       ├── apiserver.crt.dd3b5fb2
│       ├── apiserver.key
│       ├── apiserver.key.dd3b5fb2
│       ├── client.crt
│       ├── client.key
│       ├── config.json
│       ├── events.json
│       ├── proxy-client.crt
│       └── proxy-client.key
├── proxy-client-ca.crt
└── proxy-client-ca.key

19 directories, 41 files

而kubectl访问集群是的配置文件保存在~/.kube下,

$ cat  ~/.kube/config 
apiVersion: v1
clusters:
- cluster:
    certificate-authority: /home/vagrant/.minikube/ca.crt
    extensions:
    - extension:
        last-update: Tue, 30 Aug 2022 10:39:36 CST
        provider: minikube.sigs.k8s.io
        version: v1.26.1
      name: cluster_info
    server: https://192.168.49.2:8443 #访问集群的API
  name: minikube
contexts:
- context:
    cluster: minikube
    extensions:
    - extension:
        last-update: Tue, 30 Aug 2022 10:39:36 CST
        provider: minikube.sigs.k8s.io
        version: v1.26.1
      name: context_info
    namespace: default
    user: minikube
  name: minikube
current-context: minikube
kind: Config
preferences: {}
users:
- name: minikube
  user:  #这些是访问集群时的证书文件
    client-certificate: /home/vagrant/.minikube/profiles/minikube/client.crt
    client-key: /home/vagrant/.minikube/profiles/minikube/client.key

后面在kubebuilder或operator开发中会用到它。

开启代理访问kubernetes api

#设置API server接收所有主机的请求:
$ kubectl proxy --address='0.0.0.0'  --accept-hosts='^*$'
Starting to serve on [::]:8001

查看api

$ curl -X GET -L http://127.0.0.1:8001
{
  "paths": [
    "/.well-known/openid-configuration",
    "/api",
    "/api/v1",
    "/apis",
    "/apis/",
    "/apis/admissionregistration.k8s.io",
    "/apis/admissionregistration.k8s.io/v1",
    "/apis/apiextensions.k8s.io",
    "/apis/apiextensions.k8s.io/v1",
    "/apis/apiregistration.k8s.io",
    "/apis/apiregistration.k8s.io/v1",
    "/apis/apps",
    "/apis/apps/v1",
    "/apis/authentication.k8s.io",
    "/apis/authentication.k8s.io/v1",
    "/apis/authorization.k8s.io",
    "/apis/authorization.k8s.io/v1",
    "/apis/autoscaling",
    "/apis/autoscaling/v1",
    "/apis/autoscaling/v2",
    "/apis/autoscaling/v2beta1",
    "/apis/autoscaling/v2beta2",
    "/apis/batch",
    "/apis/batch/v1",
    "/apis/batch/v1beta1",
    "/apis/certificates.k8s.io",
    "/apis/certificates.k8s.io/v1",
    "/apis/coordination.k8s.io",
    "/apis/coordination.k8s.io/v1",
    "/apis/discovery.k8s.io",
    "/apis/discovery.k8s.io/v1",
    "/apis/discovery.k8s.io/v1beta1",
    "/apis/events.k8s.io",
    "/apis/events.k8s.io/v1",
    "/apis/events.k8s.io/v1beta1",
    "/apis/flowcontrol.apiserver.k8s.io",
    "/apis/flowcontrol.apiserver.k8s.io/v1beta1",
    "/apis/flowcontrol.apiserver.k8s.io/v1beta2",
    "/apis/myapp.demo.kubebuilder.io",
    "/apis/myapp.demo.kubebuilder.io/v1",
    "/apis/networking.k8s.io",
    "/apis/networking.k8s.io/v1",
    "/apis/node.k8s.io",
    "/apis/node.k8s.io/v1",
    "/apis/node.k8s.io/v1beta1",
    "/apis/policy",
    "/apis/policy/v1",
    "/apis/policy/v1beta1",
    "/apis/rbac.authorization.k8s.io",
    "/apis/rbac.authorization.k8s.io/v1",
    "/apis/scheduling.k8s.io",
    "/apis/scheduling.k8s.io/v1",
    "/apis/storage.k8s.io",
    "/apis/storage.k8s.io/v1",
    "/apis/storage.k8s.io/v1beta1",
    "/healthz",
    "/healthz/autoregister-completion",
    "/healthz/etcd",
    "/healthz/log",
    "/healthz/ping",
    "/healthz/poststarthook/aggregator-reload-proxy-client-cert",
    "/healthz/poststarthook/apiservice-openapi-controller",
    "/healthz/poststarthook/apiservice-openapiv3-controller",
    "/healthz/poststarthook/apiservice-registration-controller",
    "/healthz/poststarthook/apiservice-status-available-controller",
    "/healthz/poststarthook/bootstrap-controller",
    "/healthz/poststarthook/crd-informer-synced",
    "/healthz/poststarthook/generic-apiserver-start-informers",
    "/healthz/poststarthook/kube-apiserver-autoregistration",
    "/healthz/poststarthook/priority-and-fairness-config-consumer",
    "/healthz/poststarthook/priority-and-fairness-config-producer",
    "/healthz/poststarthook/priority-and-fairness-filter",
    "/healthz/poststarthook/rbac/bootstrap-roles",
    "/healthz/poststarthook/scheduling/bootstrap-system-priority-classes",
    "/healthz/poststarthook/start-apiextensions-controllers",
    "/healthz/poststarthook/start-apiextensions-informers",
    "/healthz/poststarthook/start-cluster-authentication-info-controller",
    "/healthz/poststarthook/start-kube-aggregator-informers",
    "/healthz/poststarthook/start-kube-apiserver-admission-initializer",
    "/livez",
    "/livez/autoregister-completion",
    "/livez/etcd",
    "/livez/log",
    "/livez/ping",
    "/livez/poststarthook/aggregator-reload-proxy-client-cert",
    "/livez/poststarthook/apiservice-openapi-controller",
    "/livez/poststarthook/apiservice-openapiv3-controller",
    "/livez/poststarthook/apiservice-registration-controller",
    "/livez/poststarthook/apiservice-status-available-controller",
    "/livez/poststarthook/bootstrap-controller",
    "/livez/poststarthook/crd-informer-synced",
    "/livez/poststarthook/generic-apiserver-start-informers",
    "/livez/poststarthook/kube-apiserver-autoregistration",
    "/livez/poststarthook/priority-and-fairness-config-consumer",
    "/livez/poststarthook/priority-and-fairness-config-producer",
    "/livez/poststarthook/priority-and-fairness-filter",
    "/livez/poststarthook/rbac/bootstrap-roles",
    "/livez/poststarthook/scheduling/bootstrap-system-priority-classes",
    "/livez/poststarthook/start-apiextensions-controllers",
    "/livez/poststarthook/start-apiextensions-informers",
    "/livez/poststarthook/start-cluster-authentication-info-controller",
    "/livez/poststarthook/start-kube-aggregator-informers",
    "/livez/poststarthook/start-kube-apiserver-admission-initializer",
    "/logs",
    "/metrics",
    "/openapi/v2",
    "/openapi/v3",
    "/openapi/v3/",
    "/openid/v1/jwks",
    "/readyz",
    "/readyz/autoregister-completion",
    "/readyz/etcd",
    "/readyz/informer-sync",
    "/readyz/log",
    "/readyz/ping",
    "/readyz/poststarthook/aggregator-reload-proxy-client-cert",
    "/readyz/poststarthook/apiservice-openapi-controller",
    "/readyz/poststarthook/apiservice-openapiv3-controller",
    "/readyz/poststarthook/apiservice-registration-controller",
    "/readyz/poststarthook/apiservice-status-available-controller",
    "/readyz/poststarthook/bootstrap-controller",
    "/readyz/poststarthook/crd-informer-synced",
    "/readyz/poststarthook/generic-apiserver-start-informers",
    "/readyz/poststarthook/kube-apiserver-autoregistration",
    "/readyz/poststarthook/priority-and-fairness-config-consumer",
    "/readyz/poststarthook/priority-and-fairness-config-producer",
    "/readyz/poststarthook/priority-and-fairness-filter",
    "/readyz/poststarthook/rbac/bootstrap-roles",
    "/readyz/poststarthook/scheduling/bootstrap-system-priority-classes",
    "/readyz/poststarthook/start-apiextensions-controllers",
    "/readyz/poststarthook/start-apiextensions-informers",
    "/readyz/poststarthook/start-cluster-authentication-info-controller",
    "/readyz/poststarthook/start-kube-aggregator-informers",
    "/readyz/poststarthook/start-kube-apiserver-admission-initializer",
    "/readyz/shutdown",
    "/version"
  ]

查看pod:

$ curl -X GET -L http://127.0.0.1:8001/api/v1/pods

查看deployments

$ curl -X GET -L http://127.0.0.1:8001/apis/apps/v1/deployments

安装过程中,常见问题:

执行到【kubelet-check】过程中失败,下载"k8s.gcr.io/pause:3.6"镜像超时

[etcd] Creating static Pod manifest for local etcd in "/etc/kubernetes/manifests"
[wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory "/etc/kubernetes/manifests". This can take up to 4m0s
[kubelet-check] Initial timeout of 40s passed.

Unfortunately, an error has occurred:
        timed out waiting for the condition

This error is likely caused by:
        - The kubelet is not running
        - The kubelet is unhealthy due to a misconfiguration of the node in some way (required cgroups disabled)

If you are on a systemd-powered system, you can try to troubleshoot the error with the following commands:
        - 'systemctl status kubelet'
        - 'journalctl -xeu kubelet'

Additionally, a control plane component may have crashed or exited when started by the container runtime.
To troubleshoot, list all containers using your preferred container runtimes CLI.
Here is one example how you may list all running Kubernetes containers by using crictl:
        - 'crictl --runtime-endpoint unix:///var/run/cri-dockerd.sock ps -a | grep kube | grep -v pause'
        Once you have found the failing container, you can inspect its logs with:
        - 'crictl --runtime-endpoint unix:///var/run/cri-dockerd.sock logs CONTAINERID'

stderr:
W0829 02:16:52.980341    1499 initconfiguration.go:120] Usage of CRI endpoints without URL scheme is deprecated and can cause kubelet errors in the future. Automatically prepending scheme "unix" to the "criSocket" with value "/var/run/cri-dockerd.sock". Please update your configuration!
        [WARNING FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist
        [WARNING Service-Kubelet]: kubelet service is not enabled, please run 'systemctl enable kubelet.service'
error execution phase wait-control-plane: couldn't initialize a Kubernetes cluster
To see the stack trace of this error execute with --v=5 or higher

    ▪ Generating certificates and keys ...
    ▪ Booting up control plane ...\ 

注意:由于minikube是以容器的方式安装在宿主机上,所以执行上面的检查命令的时候,应该进入到容器内部,

systemctl status kubelet
journalctl -xeu kubelet

同时可以在宿主机上查看安装日志,minikube logs,

Aug 29 02:20:24 minikube kubelet[1610]: E0829 02:20:24.539096    1610 kuberuntime_sandbox.go:70] "Failed to create sandbox for pod" err="rpc error: code = Unknown desc = failed pulling image \"k8s.gcr.io/pause:3.6\": Error response from daemon: Get \"https://k8s.gcr.io/v2/\": net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)" pod="kube-system/kube-controller-manager-minikube"

这里出现下载"k8s.gcr.io/pause:3.6"镜像超时,那就手动下载下吧!,注意是要下载到minikube容器上

查看宿主机docker进程,(补充一下,也可以直接minikube ssh)

[root@VM-4-9-centos ~]# docker ps
CONTAINER ID   IMAGE                                                                 COMMAND                  CREATED          STATUS          PORTS                                                                                                                                  NAMES
0dd5203d291e   registry.cn-hangzhou.aliyuncs.com/google_containers/kicbase:v0.0.33   "/usr/local/bin/entr…"   10 minutes ago   Up 10 minutes   127.0.0.1:49157->22/tcp, 127.0.0.1:49156->2376/tcp, 127.0.0.1:49155->5000/tcp, 127.0.0.1:49154->8443/tcp, 127.0.0.1:49153->32443/tcp   minikube

进入到该容器:

[root@VM-4-9-centos ~]# docker exec -it minikube bash
root@minikube:/# cat /etc/*release*
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.4 LTS"
NAME="Ubuntu"
VERSION="20.04.4 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.4 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal
root@minikube:/# 

能够看到该容器是基于ubuntu的。

查看该容器内已经下载的镜像

root@minikube:/# docker images
REPOSITORY                                                                    TAG       IMAGE ID       CREATED         SIZE
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver            v1.24.3   d521dd763e2e   6 weeks ago     130MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler            v1.24.3   3a5aa3a515f5   6 weeks ago     51MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager   v1.24.3   586c112956df   6 weeks ago     119MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy                v1.24.3   2ae1ba6417cb   6 weeks ago     110MB
registry.cn-hangzhou.aliyuncs.com/google_containers/etcd                      3.5.3-0   aebe758cef4c   4 months ago    299MB
registry.cn-hangzhou.aliyuncs.com/google_containers/pause                     3.7       221177c6082a   5 months ago    711kB
registry.cn-hangzhou.aliyuncs.com/google_containers/coredns                   v1.8.6    a4ca41631cc7   10 months ago   46.8MB
registry.cn-hangzhou.aliyuncs.com/google_containers/storage-provisioner       v5        6e38f40d628d   17 months ago   31.5MB
root@minikube:/# 

已经有pause了,但是版本为3.7的,而安装过程却是要求下载3.6的,可能是这个版本的kubernetes的小bug吧!

那就手动下载一个3.6版本,注意要在该容器内pull,而不是宿主机上

$ docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.6
3.6: Pulling from google_containers/pause
fbe1a72f5dcd: Pull complete 
Digest: sha256:3d380ca8864549e74af4b29c10f9cb0956236dfb01c40ca076fb6c37253234db
Status: Downloaded newer image for registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.6
registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.6

修改tag名为k8s.gcr.io/pause:3.6

#修改tag名
root@minikube:/# docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.6 k8s.gcr.io/pause:3.6
#删除registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.6
root@minikube:/# docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.6
Untagged: registry.cn-hangzhou.aliyuncs.com/google_containers/pause:3.6
Untagged: registry.cn-hangzhou.aliyuncs.com/google_containers/pause@sha256:3d380ca8864549e74af4b29c10f9cb0956236dfb01c40ca076fb6c37253234db
#查看修改后k8s.gcr.io/pause
root@minikube:/# docker images
REPOSITORY                                                                    TAG       IMAGE ID       CREATED         SIZE
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver            v1.24.3   d521dd763e2e   6 weeks ago     130MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy                v1.24.3   2ae1ba6417cb   6 weeks ago     110MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager   v1.24.3   586c112956df   6 weeks ago     119MB
registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler            v1.24.3   3a5aa3a515f5   6 weeks ago     51MB
registry.cn-hangzhou.aliyuncs.com/google_containers/etcd                      3.5.3-0   aebe758cef4c   4 months ago    299MB
registry.cn-hangzhou.aliyuncs.com/google_containers/pause                     3.7       221177c6082a   5 months ago    711kB
registry.cn-hangzhou.aliyuncs.com/google_containers/coredns                   v1.8.6    a4ca41631cc7   10 months ago   46.8MB
k8s.gcr.io/pause                                                              3.6       6270bb605e12   12 months ago   683kB
registry.cn-hangzhou.aliyuncs.com/google_containers/storage-provisioner       v5        6e38f40d628d   17 months ago   31.5MB
root@minikube:/# 

再次在宿主机上执行minikube start就可以了。

posted @ 2022-08-29 11:07  cosmoswong  阅读(1086)  评论(0编辑  收藏  举报