Kind快速部署Kubernetes多集群

云计算 2023-11-22 共饮一杯 手机阅读

Kind架构及原理

Kind 使用一个 container 来模拟一个 node，在 container 里面跑 systemd ，并用 systemd 托管 kubelet 以及 containerd，然后通过容器内部的 kubelet 把其他 K8s 组件，比如 kube-apiserver、etcd、CNI 等跑起来。

它可以通过配置文件的方式创建多个 container 来模拟创建多个 node，并以这些 node 构建一个多节点的 Kubernetes 集群。

Kind 内部使用的集群部署工具是 kubeadm，借助 kubeadm 提供的 Alpha 特性，它可以部署包括 HA master 的高可用集群。同时，在 HA master 下， 它还额外部署了一个 Nginx，用来提供负载均衡 vip。

Docker 安装

宿主机安装Docker

  1. <span>for</span>
<span> pkg </span>
<span>in</span>
<span> docker</span>
<span>.</span>
<span>io docker</span>
<span>-</span>
<span>doc docker</span>
<span>-</span>
<span>compose docker</span>
<span>-</span>
<span>compose</span>
<span>-</span>
<span>v2 podman</span>
<span>-</span>
<span>docker containerd runc</span>
<span>;</span>
<span> </span>
<span>do</span>
<span> sudo apt</span>
<span>-</span>
<span>get</span>
<span> remove $pkg</span>
<span>;</span>
<span> </span>
<span>done</span>
  1. <span>sudo apt</span>
<span>-</span>
<span>get</span>
<span> update</span>
    2. 

  2. <span>sudo apt</span>
<span>-</span>
<span>get</span>
<span> install ca</span>
<span>-</span>
<span>certificates curl gnupg</span>
    3. 

  3. <span>sudo install </span>
<span>-</span>
<span>m </span>
<span>0755</span>
<span> </span>
<span>-</span>
<span>d </span>
<span>/</span>
<span>etc</span>
<span>/</span>
<span>apt</span>
<span>/</span>
<span>keyrings</span>
    4. 

  4. <span>curl </span>
<span>-</span>
<span>fsSL https</span>
<span>:</span>
<span>//download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg</span>
    5. 

  5. <span>sudo chmod a</span>
<span>+</span>
<span>r </span>
<span>/</span>
<span>etc</span>
<span>/</span>
<span>apt</span>
<span>/</span>
<span>keyrings</span>
<span>/</span>
<span>docker</span>
<span>.</span>
<span>gpg</span>
    6. 

    7. 

  7. <span># Add the repository to Apt sources:</span>
    8. 

  8. <span>echo </span>
    9. 

  9. <span>  </span>
<span>"deb [arch="</span>
<span>$</span>
<span>(</span>
<span>dpkg </span>
<span>--</span>
<span>print</span>
<span>-</span>
<span>architecture</span>
<span>)</span>
<span>" signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu </span>
    10. 

  10. <span>  "</span>
<span>$</span>
<span>(.</span>
<span> </span>
<span>/</span>
<span>etc</span>
<span>/</span>
<span>os</span>
<span>-</span>
<span>release </span>
<span>&&</span>
<span> echo </span>
<span>"$VERSION_CODENAME"</span>
<span>)</span>
<span>" stable"</span>
<span> </span>
<span>|</span>
<span> </span>
    11. 

  11. <span>  sudo tee </span>
<span>/</span>
<span>etc</span>
<span>/</span>
<span>apt</span>
<span>/</span>
<span>sources</span>
<span>.</span>
<span>list</span>
<span>.</span>
<span>d</span>
<span>/</span>
<span>docker</span>
<span>.</span>
<span>list </span>
<span>></span>
<span> </span>
<span>/dev/</span>
<span>null</span>
    12. 

  12. <span>sudo apt</span>
<span>-</span>
<span>get</span>
<span> update</span>

安装Docker

  1. <span>sudo apt</span>
<span>-</span>
<span>get</span>
<span> install docker</span>
<span>-</span>
<span>ce docker</span>
<span>-</span>
<span>ce</span>
<span>-</span>
<span>cli containerd</span>
<span>.</span>
<span>io docker</span>
<span>-</span>
<span>buildx</span>
<span>-</span>
<span>plugin docker</span>
<span>-</span>
<span>compose</span>
<span>-</span>
<span>plugin</span>

Kind安装

首先我们下载Kind二进制包

  1. <span>wget https</span>
<span>:</span>
<span>//github.com/kubernetes-sigs/kind/releases/download/v0.20.0/kind-linux-amd64</span>
    2. 

  2. <span>mv kind</span>
<span>-</span>
<span>linux</span>
<span>-</span>
<span>amd64 </span>
<span>/</span>
<span>usr</span>
<span>/</span>
<span>bin</span>
<span>/</span>
<span>kind</span>
    3. 

  3. <span>chmod </span>
<span>+</span>
<span>x </span>
<span>/</span>
<span>usr</span>
<span>/</span>
<span>bin</span>
<span>/</span>
<span>kind</span>

指定版本号并创建集群

  1. <span>cat </span>
<span>></span>
<span>kind</span>
<span>-</span>
<span>demo</span>
<span>.</span>
<span>yaml</span>
<span><<</span>
<span>EOF</span>
    2. 

  2. <span>kind</span>
<span>:</span>
<span> </span>
<span>Cluster</span>
    3. 

  3. <span>name</span>
<span>:</span>
<span> abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
    4. 

  4. <span>apiVersion</span>
<span>:</span>
<span> kind</span>
<span>.</span>
<span>x</span>
<span>-</span>
<span>k8s</span>
<span>.</span>
<span>io</span>
<span>/</span>
<span>v1alpha4</span>
    5. 

  5. <span>networking</span>
<span>:</span>
    6. 

  6. <span>        disableDefaultCNI</span>
<span>:</span>
<span> </span>
<span>false</span>
    7. 

  7. <span>nodes</span>
<span>:</span>
    8. 

  8. <span>        </span>
<span>-</span>
<span> role</span>
<span>:</span>
<span> control</span>
<span>-</span>
<span>plane</span>
    9. 

  9. <span>          </span>
<span>#- role: control-plane</span>
    10. 

  10. <span>          </span>
<span>#- role: control-plane</span>
    11. 

  11. <span>        </span>
<span>-</span>
<span> role</span>
<span>:</span>
<span> worker</span>
    12. 

  12. <span>        </span>
<span>-</span>
<span> role</span>
<span>:</span>
<span> worker</span>
    13. 

  13. <span>        </span>
<span>-</span>
<span> role</span>
<span>:</span>
<span> worker</span>
    14. 

  14. <span>EOF</span>

参数详解

  • name 设置集群名称
  • networking.disableDefaultCNI 创建的集群默认自带一个轻量级的 CNI 插件 kindnetd ，我们也可以禁用默认设置来安装其他 CNI，比如 Calico。
  • nodes control-plance master节点数量
  • nodes worker node节点数量

快速创建集群

本次版本采用v1.24.15

  1. <span>kind create cluster </span>
<span>--</span>
<span>config</span>
<span>=</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
<span>.</span>
<span>yaml </span>
<span>--</span>
<span>image</span>
<span>=</span>
<span>kindest</span>
<span>/</span>
<span>node</span>
<span>:</span>
<span>v1</span>
<span>.</span>
<span>24.15</span>
<span> </span>
<span>--</span>
<span>name</span>
<span>=</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
    2. 

    3. 

  3. <span>日志输出以下</span>
    4. 

  4. <span>Creating</span>
<span> cluster </span>
<span>"abcdocker-kind-demo"</span>
<span> </span>
<span>...</span>
    5. 

  5. <span> </span>
<span>✓</span>
<span> </span>
<span>Ensuring</span>
<span> node image </span>
<span>(</span>
<span>kindest</span>
<span>/</span>
<span>node</span>
<span>:</span>
<span>v1</span>
<span>.</span>
<span>24.15</span>
<span>)</span>
<span> </span>
<span>🖼</span>
    6. 

  6. <span> </span>
<span>✓</span>
<span> </span>
<span>Preparing</span>
<span> nodes </span>
<span>📦</span>
<span> </span>
<span>📦</span>
    7. 

  7. <span> </span>
<span>✓</span>
<span> </span>
<span>Writing</span>
<span> configuration </span>
<span>📜</span>
    8. 

  8. <span> </span>
<span>✓</span>
<span> </span>
<span>Starting</span>
<span> control</span>
<span>-</span>
<span>plane </span>
<span>🕹️</span>
    9. 

  9. <span> </span>
<span>✓</span>
<span> </span>
<span>Installing</span>
<span> CNI </span>
<span>🔌</span>
    10. 

  10. <span> </span>
<span>✓</span>
<span> </span>
<span>Installing</span>
<span> </span>
<span>StorageClass</span>
<span> </span>
<span>💾</span>
    11. 

  11. <span> </span>
<span>✓</span>
<span> </span>
<span>Joining</span>
<span> worker nodes </span>
<span>🚜</span>
    12. 

  12. <span>Set</span>
<span> kubectl context to </span>
<span>"kind-abcdocker-kind-demo"</span>
    13. 

  13. <span>You</span>
<span> can now </span>
<span>use</span>
<span> your cluster </span>
<span>with</span>
<span>:</span>
    14. 

    15. 

  15. <span>kubectl cluster</span>
<span>-</span>
<span>info </span>
<span>--</span>
<span>context kind</span>
<span>-</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
    16. 

    17. 

  17. <span>Thanks</span>
<span> </span>
<span>for</span>
<span> </span>
<span>using</span>
<span> kind</span>
<span>!</span>
<span> </span>
<span>😊</span>

安装kubectl

  1. <span>curl </span>
<span>-</span>
<span>LO https</span>
<span>:</span>
<span>//dl.k8s.io/release/v1.24.15/bin/linux/amd64/kubectl</span>
    2. 

  2. <span>chmod </span>
<span>+</span>
<span>x kubectl</span>
    3. 

  3. <span>mv kubectl </span>
<span>/</span>
<span>usr</span>
<span>/</span>
<span>bin</span>
<span>/</span>

可以查看集群状态

  1. <span>root@abcdocker</span>
<span>:~#</span>
<span> kubectl cluster</span>
<span>-</span>
<span>info </span>
<span>--</span>
<span>context kind</span>
<span>-</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
    2. 

  2. <span>Kubernetes</span>
<span> control plane </span>
<span>is</span>
<span> running at https</span>
<span>:</span>
<span>//127.0.0.1:42687</span>
    3. 

  3. <span>CoreDNS</span>
<span> </span>
<span>is</span>
<span> running at https</span>
<span>:</span>
<span>//127.0.0.1:42687/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy</span>
    4. 

    5. 

  5. <span>To</span>
<span> further debug </span>
<span>and</span>
<span> diagnose cluster problems</span>
<span>,</span>
<span> </span>
<span>use</span>
<span> </span>
<span>'kubectl cluster-info dump'</span>

接下来我们就可以get node查看到节点信息

  1. <span>root@abcdocker</span>
<span>:~#</span>
<span> kubectl  </span>
<span>get</span>
<span>  node</span>
    2. 

  2. <span>NAME                                STATUS   ROLES           AGE    VERSION</span>
    3. 

  3. <span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane   </span>
<span>Ready</span>
<span>    control</span>
<span>-</span>
<span>plane   </span>
<span>2m2s</span>
<span>   v1</span>
<span>.</span>
<span>24.15</span>
    4. 

  4. <span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
<span>-</span>
<span>worker          </span>
<span>Ready</span>
<span>    </span>
<span><none></span>
<span>          </span>
<span>90s</span>
<span>    v1</span>
<span>.</span>
<span>24.15</span>
    5. 

  5. <span>root@abcdocker</span>
<span>:~#</span>
<span> kubectl </span>
<span>get</span>
<span> pod </span>
<span>-</span>
<span>n kube</span>
<span>-</span>
<span>system</span>
    6. 

  6. <span>NAME                                                        READY   STATUS    RESTARTS   AGE</span>
    7. 

  7. <span>coredns</span>
<span>-</span>
<span>57575c5f89</span>
<span>-</span>
<span>9ltk6</span>
<span>                                    </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>108s</span>
    8. 

  8. <span>coredns</span>
<span>-</span>
<span>57575c5f89</span>
<span>-</span>
<span>glgvh                                    </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>107s</span>
    9. 

  9. <span>etcd</span>
<span>-</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane                      </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>2m7s</span>
    10. 

  10. <span>kindnet</span>
<span>-</span>
<span>ljptz                                               </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>99s</span>
    11. 

  11. <span>kindnet</span>
<span>-</span>
<span>qzglw                                               </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>109s</span>
    12. 

  12. <span>kube</span>
<span>-</span>
<span>apiserver</span>
<span>-</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane            </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>2m5s</span>
    13. 

  13. <span>kube</span>
<span>-</span>
<span>controller</span>
<span>-</span>
<span>manager</span>
<span>-</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane   </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>2m1s</span>
    14. 

  14. <span>kube</span>
<span>-</span>
<span>proxy</span>
<span>-</span>
<span>kvzx9                                            </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>109s</span>
    15. 

  15. <span>kube</span>
<span>-</span>
<span>proxy</span>
<span>-</span>
<span>pnzmz                                            </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>99s</span>
    16. 

  16. <span>kube</span>
<span>-</span>
<span>scheduler</span>
<span>-</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane            </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>2m9s</span>

Kind 常用命令

  1. <span>查看集群</span>
    2. 

  2. <span>kind </span>
<span>get</span>
<span> clusters</span>
    3. 

    4. 

  4. <span>删除集群</span>
    5. 

  5. <span>kind </span>
<span>delete</span>
<span> cluster </span>
<span>--</span>
<span>name </span>
<span>集群名称</span>

Kind创建多套集群

实际上只是需要给yaml文件修改即可

  1. <span>cat  </span>
<span>></span>
<span>kind</span>
<span>-</span>
<span>demo1</span>
<span>.</span>
<span>yaml</span>
<span><<</span>
<span>EOF</span>
    2. 

  2. <span>kind</span>
<span>:</span>
<span> </span>
<span>Cluster</span>
    3. 

  3. <span>name</span>
<span>:</span>
<span> abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo1</span>
    4. 

  4. <span>apiVersion</span>
<span>:</span>
<span> kind</span>
<span>.</span>
<span>x</span>
<span>-</span>
<span>k8s</span>
<span>.</span>
<span>io</span>
<span>/</span>
<span>v1alpha4</span>
    5. 

  5. <span>networking</span>
<span>:</span>
    6. 

  6. <span>        disableDefaultCNI</span>
<span>:</span>
<span> </span>
<span>true</span>
<span>  </span>
<span>#这里开启个cni</span>
    7. 

  7. <span>nodes</span>
<span>:</span>
    8. 

  8. <span>        </span>
<span>-</span>
<span> role</span>
<span>:</span>
<span> control</span>
<span>-</span>
<span>plane</span>
    9. 

  9. <span>          </span>
<span>#- role: control-plane</span>
    10. 

  10. <span>          </span>
<span>#- role: control-plane</span>
    11. 

  11. <span>        </span>
<span>-</span>
<span> role</span>
<span>:</span>
<span> worker</span>
    12. 

  12. <span>EOF</span>

disableDefaultCNI禁用了默认的kindnetd插件,CNI就需要我们自己安装flannel或者其它calico组件

使用下面命令创建集群

版本我们这边换成1.28.0

  1. <span>kind create cluster </span>
<span>--</span>
<span>config</span>
<span>=</span>
<span>kind</span>
<span>-</span>
<span>demo1</span>
<span>.</span>
<span>yaml </span>
<span>--</span>
<span>image</span>
<span>=</span>
<span>kindest</span>
<span>/</span>
<span>node</span>
<span>:</span>
<span>v1</span>
<span>.</span>
<span>28.0</span>
<span> </span>
<span>--</span>
<span>name</span>
<span>=</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo1</span>
    2. 

    3. 

  3. <span>日志</span>
<span> </span>
<span>输出如下</span>
    4. 

  4. <span>Creating</span>
<span> cluster </span>
<span>"abcdocker-kind-demo1"</span>
<span> </span>
<span>...</span>
    5. 

  5. <span> </span>
<span>✓</span>
<span> </span>
<span>Ensuring</span>
<span> node image </span>
<span>(</span>
<span>kindest</span>
<span>/</span>
<span>node</span>
<span>:</span>
<span>v1</span>
<span>.</span>
<span>28.0</span>
<span>)</span>
<span> </span>
<span>🖼</span>
    6. 

  6. <span> </span>
<span>✓</span>
<span> </span>
<span>Preparing</span>
<span> nodes </span>
<span>📦</span>
<span> </span>
<span>📦</span>
    7. 

  7. <span> </span>
<span>✓</span>
<span> </span>
<span>Writing</span>
<span> configuration </span>
<span>📜</span>
    8. 

  8. <span> </span>
<span>✓</span>
<span> </span>
<span>Starting</span>
<span> control</span>
<span>-</span>
<span>plane </span>
<span>🕹️</span>
    9. 

  9. <span> </span>
<span>✓</span>
<span> </span>
<span>Installing</span>
<span> </span>
<span>StorageClass</span>
<span> </span>
<span>💾</span>
    10. 

  10. <span> </span>
<span>✓</span>
<span> </span>
<span>Joining</span>
<span> worker nodes </span>
<span>🚜</span>
    11. 

  11. <span>Set</span>
<span> kubectl context to </span>
<span>"kind-abcdocker-kind-demo1"</span>
    12. 

  12. <span>You</span>
<span> can now </span>
<span>use</span>
<span> your cluster </span>
<span>with</span>
<span>:</span>
    13. 

    14. 

  14. <span>kubectl cluster</span>
<span>-</span>
<span>info </span>
<span>--</span>
<span>context kind</span>
<span>-</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo1</span>
    15. 

    16. 

  16. <span>Thanks</span>
<span> </span>
<span>for</span>
<span> </span>
<span>using</span>
<span> kind</span>
<span>!</span>
<span> </span>
<span>😊</span>

查看集群状态

  1. <span>root@abcdocker</span>
<span>:~#</span>
<span> kubectl </span>
<span>get</span>
<span> node</span>
    2. 

  2. <span>NAME                                 STATUS     ROLES           AGE     VERSION</span>
    3. 

  3. <span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo1</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane   </span>
<span>NotReady</span>
<span>   control</span>
<span>-</span>
<span>plane   </span>
<span>3m46s</span>
<span>   v1</span>
<span>.</span>
<span>28.0</span>
    4. 

  4. <span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo1</span>
<span>-</span>
<span>worker          </span>
<span>NotReady</span>
<span>   </span>
<span><none></span>
<span>          </span>
<span>3m17s</span>
<span>   v1</span>
<span>.</span>
<span>28.0</span>
    5. 

    6. 

  6. <span>pod</span>
<span>状态</span>
    7. 

  7. <span>root@abcdocker</span>
<span>:~#</span>
<span> kubectl </span>
<span>get</span>
<span> pod </span>
<span>-</span>
<span>n kube</span>
<span>-</span>
<span>system</span>
    8. 

  8. <span>NAME                                                         READY   STATUS    RESTARTS   AGE</span>
    9. 

  9. <span>coredns</span>
<span>-</span>
<span>5dd5756b68</span>
<span>-</span>
<span>l94jm                                     </span>
<span>0</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Pending</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>3m58s</span>
    10. 

  10. <span>coredns</span>
<span>-</span>
<span>5dd5756b68</span>
<span>-</span>
<span>psm7p                                     </span>
<span>0</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Pending</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>3m58s</span>
    11. 

  11. <span>etcd</span>
<span>-</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo1</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane                      </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>4m12s</span>
    12. 

  12. <span>kube</span>
<span>-</span>
<span>apiserver</span>
<span>-</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo1</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane            </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>4m11s</span>
    13. 

  13. <span>kube</span>
<span>-</span>
<span>controller</span>
<span>-</span>
<span>manager</span>
<span>-</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo1</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane   </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>4m12s</span>
    14. 

  14. <span>kube</span>
<span>-</span>
<span>proxy</span>
<span>-</span>
<span>bln4n                                             </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>3m50s</span>
    15. 

  15. <span>kube</span>
<span>-</span>
<span>proxy</span>
<span>-</span>
<span>l4k49                                             </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>3m59s</span>
    16. 

  16. <span>kube</span>
<span>-</span>
<span>scheduler</span>
<span>-</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo1</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane            </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>4m16s</span>

切换集群

  • 1.24集群版本默认cni插件
  • 1.28集群版本不使用默认插件

接下来可以通过 kubectl config use-context xx_name快速切换集群

首先获取Cluster名称，我现在在k8s 1.28版本，现在我切换到1.24.15版本

  1. <span>root@abcdocker</span>
<span>:~#</span>
<span> kind </span>
<span>get</span>
<span> clusters</span>
    2. 

  2. <span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
    3. 

  3. <span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo1</span>

切换到abcdocker-kind-demo集群

  1. <span>root@abcdocker</span>
<span>:~#</span>
<span> kubectl config </span>
<span>use</span>
<span>-</span>
<span>context kind</span>
<span>-</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
    2. 

  2. <span>Switched</span>
<span> to context </span>
<span>"kind-abcdocker-kind-demo"</span>
<span>.</span>
    3. 

  3. <span>root@abcdocker</span>
<span>:~#</span>
<span> kubectl </span>
<span>get</span>
<span> node</span>
    4. 

  4. <span>NAME                                STATUS   ROLES           AGE   VERSION</span>
    5. 

  5. <span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane   </span>
<span>Ready</span>
<span>    control</span>
<span>-</span>
<span>plane   </span>
<span>43m</span>
<span>   v1</span>
<span>.</span>
<span>24.15</span>
    6. 

  6. <span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
<span>-</span>
<span>worker          </span>
<span>Ready</span>
<span>    </span>
<span><none></span>
<span>          </span>
<span>43m</span>
<span>   v1</span>
<span>.</span>
<span>24.15</span>

切换到abcdocker-kind-demo1集群

  1. <span>root@abcdocker</span>
<span>:~#</span>
<span> kubectl config </span>
<span>use</span>
<span>-</span>
<span>context kind</span>
<span>-</span>
<span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo1</span>
    2. 

  2. <span>Switched</span>
<span> to context </span>
<span>"kind-abcdocker-kind-demo1"</span>
<span>.</span>
    3. 

  3. <span>root@abcdocker</span>
<span>:~#</span>
<span> kubectl </span>
<span>get</span>
<span> node</span>
    4. 

  4. <span>NAME                                 STATUS     ROLES           AGE   VERSION</span>
    5. 

  5. <span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo1</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane   </span>
<span>NotReady</span>
<span>   control</span>
<span>-</span>
<span>plane   </span>
<span>36m</span>
<span>   v1</span>
<span>.</span>
<span>28.0</span>
    6. 

  6. <span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo1</span>
<span>-</span>
<span>worker          </span>
<span>NotReady</span>
<span>   </span>
<span><none></span>
<span>          </span>
<span>36m</span>
<span>   v1</span>
<span>.</span>
<span>28.0</span>

测试集群

  1. <span>cat</span>
<span><<</span>
<span>EOF </span>
<span>|</span>
<span> kubectl apply </span>
<span>-</span>
<span>f </span>
<span>-</span>
    2. 

  2. <span>apiVersion</span>
<span>:</span>
<span> apps</span>
<span>/</span>
<span>v1</span>
    3. 

  3. <span>kind</span>
<span>:</span>
<span> </span>
<span>Deployment</span>
    4. 

  4. <span>metadata</span>
<span>:</span>
    5. 

  5. <span>  name</span>
<span>:</span>
<span> nginx</span>
    6. 

  6. <span>spec</span>
<span>:</span>
    7. 

  7. <span>  selector</span>
<span>:</span>
    8. 

  8. <span>    matchLabels</span>
<span>:</span>
    9. 

  9. <span>      app</span>
<span>:</span>
<span> nginx</span>
    10. 

  10. <span>  </span>
<span>template</span>
<span>:</span>
    11. 

  11. <span>    metadata</span>
<span>:</span>
    12. 

  12. <span>      labels</span>
<span>:</span>
    13. 

  13. <span>        app</span>
<span>:</span>
<span> nginx</span>
    14. 

  14. <span>    spec</span>
<span>:</span>
    15. 

  15. <span>      containers</span>
<span>:</span>
    16. 

  16. <span>      </span>
<span>-</span>
<span> image</span>
<span>:</span>
<span> nginx</span>
<span>:</span>
<span>alpine</span>
    17. 

  17. <span>        name</span>
<span>:</span>
<span> nginx</span>
    18. 

  18. <span>        ports</span>
<span>:</span>
    19. 

  19. <span>        </span>
<span>-</span>
<span> containerPort</span>
<span>:</span>
<span> </span>
<span>80</span>
    20. 

  20. <span>---</span>
    21. 

  21. <span>apiVersion</span>
<span>:</span>
<span> v1</span>
    22. 

  22. <span>kind</span>
<span>:</span>
<span> </span>
<span>Service</span>
    23. 

  23. <span>metadata</span>
<span>:</span>
    24. 

  24. <span>  name</span>
<span>:</span>
<span> nginx</span>
    25. 

  25. <span>spec</span>
<span>:</span>
    26. 

  26. <span>  selector</span>
<span>:</span>
    27. 

  27. <span>    app</span>
<span>:</span>
<span> nginx</span>
    28. 

  28. <span>  type</span>
<span>:</span>
<span> </span>
<span>NodePort</span>
    29. 

  29. <span>  ports</span>
<span>:</span>
    30. 

  30. <span>    </span>
<span>-</span>
<span> protocol</span>
<span>:</span>
<span> TCP</span>
    31. 

  31. <span>      port</span>
<span>:</span>
<span> </span>
<span>80</span>
    32. 

  32. <span>      targetPort</span>
<span>:</span>
<span> </span>
<span>80</span>
    33. 

  33. <span>      nodePort</span>
<span>:</span>
<span> </span>
<span>30001</span>
    34. 

  34. <span>---</span>
    35. 

  35. <span>apiVersion</span>
<span>:</span>
<span> v1</span>
    36. 

  36. <span>kind</span>
<span>:</span>
<span> </span>
<span>Pod</span>
    37. 

  37. <span>metadata</span>
<span>:</span>
    38. 

  38. <span>  name</span>
<span>:</span>
<span> busybox</span>
    39. 

  39. <span>  </span>
<span>namespace</span>
<span>:</span>
<span> </span>
<span>default</span>
    40. 

  40. <span>spec</span>
<span>:</span>
    41. 

  41. <span>  containers</span>
<span>:</span>
    42. 

  42. <span>  </span>
<span>-</span>
<span> name</span>
<span>:</span>
<span> busybox</span>
    43. 

  43. <span>    image</span>
<span>:</span>
<span> abcdocker9</span>
<span>/</span>
<span>centos</span>
<span>:</span>
<span>v1</span>
    44. 

  44. <span>    command</span>
<span>:</span>
    45. 

  45. <span>      </span>
<span>-</span>
<span> sleep</span>
    46. 

  46. <span>      </span>
<span>-</span>
<span> </span>
<span>"3600"</span>
    47. 

  47. <span>    imagePullPolicy</span>
<span>:</span>
<span> </span>
<span>IfNotPresent</span>
    48. 

  48. <span>  restartPolicy</span>
<span>:</span>
<span> </span>
<span>Always</span>
    49. 

  49. <span>EOF</span>

查看服务状态

  1. <span>root@abcdocker</span>
<span>:~#</span>
<span>  kubectl </span>
<span>get</span>
<span> pod</span>
<span>,</span>
<span>svc</span>
    2. 

  2. <span>NAME                         READY   STATUS    RESTARTS   AGE</span>
    3. 

  3. <span>pod</span>
<span>/</span>
<span>busybox                  </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>2m27s</span>
    4. 

  4. <span>pod</span>
<span>/</span>
<span>nginx</span>
<span>-</span>
<span>6fb79bc456</span>
<span>-</span>
<span>st6qk   </span>
<span>1</span>
<span>/</span>
<span>1</span>
<span>     </span>
<span>Running</span>
<span>   </span>
<span>0</span>
<span>          </span>
<span>2m27s</span>
    5. 

    6. 

  6. <span>NAME                 TYPE        CLUSTER</span>
<span>-</span>
<span>IP     EXTERNAL</span>
<span>-</span>
<span>IP   PORT</span>
<span>(</span>
<span>S</span>
<span>)</span>
<span>        AGE</span>
    7. 

  7. <span>service</span>
<span>/</span>
<span>kubernetes   </span>
<span>ClusterIP</span>
<span>   </span>
<span>10.96</span>
<span>.</span>
<span>0.1</span>
<span>      </span>
<span><none></span>
<span>        </span>
<span>443</span>
<span>/</span>
<span>TCP        </span>
<span>48m</span>
    8. 

  8. <span>service</span>
<span>/</span>
<span>nginx        </span>
<span>NodePort</span>
<span>    </span>
<span>10.96</span>
<span>.</span>
<span>93.229</span>
<span>   </span>
<span><none></span>
<span>        </span>
<span>80</span>
<span>:</span>
<span>30001</span>
<span>/</span>
<span>TCP   </span>
<span>2m28s</span>

测试dns

  1. <span>root@abcdocker</span>
<span>:~#</span>
<span> kubectl </span>
<span>exec</span>
<span> </span>
<span>-</span>
<span>ti busybox </span>
<span>--</span>
<span> nslookup kubernetes</span>
    2. 

  2. <span>Server</span>
<span>:</span>
<span>     </span>
<span>10.96</span>
<span>.</span>
<span>0.10</span>
    3. 

  3. <span>Address</span>
<span>:</span>
<span>    </span>
<span>10.96</span>
<span>.</span>
<span>0.10</span>
<span>#53</span>
    4. 

    5. 

  5. <span>Name</span>
<span>:</span>
<span>   kubernetes</span>
<span>.</span>
<span>default</span>
<span>.</span>
<span>svc</span>
<span>.</span>
<span>cluster</span>
<span>.</span>
<span>local</span>
    6. 

  6. <span>Address</span>
<span>:</span>
<span> </span>
<span>10.96</span>
<span>.</span>
<span>0.1</span>

测试nginx nodeport

nginx nodeport>nginx需要进入到node容器

  1. <span>root@abcdocker</span>
<span>:~#</span>
<span> kubectl </span>
<span>get</span>
<span> node</span>
    2. 

  2. <span>NAME                                STATUS   ROLES           AGE   VERSION</span>
    3. 

  3. <span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane   </span>
<span>Ready</span>
<span>    control</span>
<span>-</span>
<span>plane   </span>
<span>53m</span>
<span>   v1</span>
<span>.</span>
<span>24.15</span>
    4. 

  4. <span>abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
<span>-</span>
<span>worker          </span>
<span>Ready</span>
<span>    </span>
<span><none></span>
<span>          </span>
<span>52m</span>
<span>   v1</span>
<span>.</span>
<span>24.15</span>
    5. 

  5. <span>root@abcdocker</span>
<span>:~#</span>
<span> docker </span>
<span>exec</span>
<span> </span>
<span>-</span>
<span>it  abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane bash</span>
    6. 

  6. <span>root@abcdocker</span>
<span>-</span>
<span>kind</span>
<span>-</span>
<span>demo</span>
<span>-</span>
<span>control</span>
<span>-</span>
<span>plane</span>
<span>:/#</span>