Kubernetes监控：结合Metrics Server下使用Dashboard

港控/mmm° 2023-07-03 06:06 2阅读 0赞

前面的文章以Dashboard 2.0.0-rc3版为例，介绍了Dashboard的使用方式。这篇文章介绍一下如何在Kubernete下结合Metrics Server和Dashboard进行监控。

# 事前准备 #

本文使用Kubernetes 1.17.2，可参看下文进行快速环境搭建：

*  [单机版本或者集群版本环境搭建][Link 1]

[root@host131 ansible]# kubectl get node -o wide
    NAME              STATUS   ROLES    AGE     VERSION   INTERNAL-IP       EXTERNAL-IP   OS-IMAGE                KERNEL-VERSION          CONTAINER-RUNTIME
    192.168.163.131   Ready    <none>   2m25s   v1.17.2   192.168.163.131   <none>        CentOS Linux 7 (Core)   3.10.0-957.el7.x86_64   docker://19.3.5
    [root@host131 ansible]#

# 安装Dashboard #

在Easypack中，使用如下命令即可安装Dashboard

> 执行命令：ansible-playbook dashboard/tests/test.yml

详细可参看：[https://liumiaocn.blog.csdn.net/article/details/104149893][https_liumiaocn.blog.csdn.net_article_details_104149893]

此时整体的workload处仍然没有CPU和内存的信息  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saXVtaWFvY24uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70]  
Pod中也无法确认到资源的详细信息，显示为-  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saXVtaWFvY24uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 1]

# 安装Metrics Server #

在Easypack中，使用如下命令即可安装Metrics Server

> 执行命令：ansible-playbook metrics/tests/test.yml

详细可参看：[https://liumiaocn.blog.csdn.net/article/details/104130029][https_liumiaocn.blog.csdn.net_article_details_104130029]

安装之后即可确认kubectl top相关的node或者pod的详细信息了

[root@host131 ansible]# kubectl top node
    NAME              CPU(cores)   CPU%   MEMORY(bytes)   MEMORY%   
    192.168.163.131   117m         11%    2699Mi          70%       
    [root@host131 ansible]#

# 结果确认 #

此时即可实时确认到workload之外的CPU和内存的使用率的变化情况，详细如下图所示：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saXVtaWFvY24uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 2]  
另外Pod处之前显示为-的信息，现在也可以显示详细的资源变化率的情况了  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saXVtaWFvY24uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 3]  
在之前同样的情况是在1.10.1等版本中安装heapster和未安装的情况有类似的显示，而目前Metrics Server替代了heapster之后，和Dashboard结合也能起到相同的作用。

[Link 1]: https://blog.csdn.net/liumiaocn/article/details/103725251
[https_liumiaocn.blog.csdn.net_article_details_104149893]: https://liumiaocn.blog.csdn.net/article/details/104149893
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saXVtaWFvY24uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200202211149787.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9saXVtaWFvY24uYmxvZy5jc2RuLm5ldA==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saXVtaWFvY24uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/2020020221130611.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9saXVtaWFvY24uYmxvZy5jc2RuLm5ldA==,size_16,color_FFFFFF,t_70
[https_liumiaocn.blog.csdn.net_article_details_104130029]: https://liumiaocn.blog.csdn.net/article/details/104130029
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saXVtaWFvY24uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200202220336992.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9saXVtaWFvY24uYmxvZy5jc2RuLm5ldA==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9saXVtaWFvY24uYmxvZy5jc2RuLm5ldA_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20200202220428416.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9saXVtaWFvY24uYmxvZy5jc2RuLm5ldA==,size_16,color_FFFFFF,t_70