k8s：pod容器的生命周期之init容器

╰+哭是因爲堅強的太久メ 2023-10-06 11:00 20阅读 0赞

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### Init C（init容器） ###

*  介绍  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70 1]

> 容器重启策略默认是Always

*  作用![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70 2]
 *  init容器可以探测mysql是否启动，如果没有启动完毕就退出Apache容器的启动，直到mysql容器完全启动完毕后再启动Apache容器：  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70 3]  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70 4]
 *  init模板  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70 5]
 *  删除所有存在的pod，以下命令只对default名称空间下的pod有效：  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70 6]
 *  删除svc  
    ![在这里插入图片描述][20200613141038159.png]
 *  创建init-pod  
    ![在这里插入图片描述][2020061314110829.png]
 *  创建mydb service  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70 7]
 *  latest标签的镜像每次pull都需要从远程仓库中拉取，因为latest是一个变量，不是一个固定值：  
    ![在这里插入图片描述][20200613141543454.png]

> 所以能不用latest就不要用它。

*  特殊说明1  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2E3NzIzMDQ0MTk_size_16_color_FFFFFF_t_70 8]
 *  特殊说明2  
    ![在这里插入图片描述][20200613142026854.png]

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[20200613141038159.png]: https://img-blog.csdnimg.cn/20200613141038159.png
[2020061314110829.png]: https://img-blog.csdnimg.cn/2020061314110829.png
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[20200613141543454.png]: https://img-blog.csdnimg.cn/20200613141543454.png
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[20200613142026854.png]: https://img-blog.csdnimg.cn/20200613142026854.png