首先,我们需要创建一个名为init-container-example.yaml的YAML文件,该文件定义了我们的Pod和初始化容器的规格。以下是一个示例: apiVersion:v1kind:Podmetadata:name:init-container-podspec:containers:-name:main-containerimage:my-app-imageinitContainers:-name:dependency-downloaderimage:busyboxcommand:["wget","...
在这个例子中,`example-pod`包含一个名为`main-container`的主容器,以及两个`initContainers`,分别为`init-container-1`和`init-container-2`。`init-container-1`执行一个简单的命令,而`init-container-2`执行一个稍微复杂一些的命令。 要注意以下几点: - `initContainers`是一个列表,你可以根据需要定义多个初...
Kubernetes 模式:InitContainer模式 Init模式 init逻辑在一般的编程语言中是通用的。在面向对象的编程语言中,我们有构造函数的概念。构造函数是一个函数(或方法),每当对象被实例化时就会调用它。构造函数的目的是为它应该做的工作“准备”对象。例如,它设置变量的默认值、创建数据库连接对象、确保存在对象正确运行的必要...
apiVersion: v1 kind: Pod metadata: name: container-example spec: initContainers: - name: init-container-1 image: lqshow/busybox-curl:1.28 ... - name: init-container-2 image: lqshow/busybox-curl:1.28 ... containers: - name: container-1 image: lqshow/busybox-curl:1.28 ... - name:...
Scenario 1: Wait for other modules to be ready.For example, an application contains two containerized services: web server and database. The web server service needs to access the database service. However, when the application is started, the database service may have not been started. There...
Init Containers are the containers that should run and complete before the startup of the main container in the pod. It provides a separate lifecycle for the initialization so that it enables separation of concerns in the applications. For example, you need to install some specific software befor...
Run init containers in Azure Container Instances to perform setup tasks in a container group before the application containers run.
截止到目前k8s1.18版本,k8s已经支持四种类型的container:标准容器,sidecar容器,init容器,ephemeral容器。 一:ephemeral容器 1.1.什么是ephemeral容器 临时容器与其他容器的不同之处在于,它们缺少对资源或执行的保证,并且永远不会自动重启,因此不适用于构建应用程序。临时容器使用与常规容器相同的ContainerSpec段进行描述,但许...
In some cases, initContainer's actions are not compatible with running main container(s), causing other failures. For example: init container moves application code into tmpfs, (or PV), while main container's entrypoint.sh updates config values from external source, causing application config to...
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