Summary: the difference between pod and container

One 、 Introduce

For our users , We don't seem to pay much attention to containers and pod level , Mainly concerned about their own applications , So I haven't studied it before Pod The difference with the container , Here's a summary

Two 、 difference

• A container is a process ,POD yes K8S The minimum scheduling unit of ,POD Analogy and virtual machine
• One POD There can be multiple containers
• At the basic monitoring level , The main indicators of containers are CPU And memory , The Internet 、 File system related indicators are used POD Of , That is, a POD The network and file system of multiple containers in are shared . In addition, the storage area is vague ,K8S The official interface supports storage restrictions , It mainly depends on how the implementation end is implemented , Some may not be realized , Or the implementation does not support request and limit The elasticity of
• Resource constraints ： This is done in a container , One POD Different containers in have different restrictions , Excess of a container will only kill the corresponding container

3、 ... and 、 The same thing

• The overall indicators are similar