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List of contents of this article:

• 1, What's the matter with the container service? Which networks are supported?
• 2 、 How to control the share of system resources (CPU, memory) occupied by the container?

What's the matter with the container service? Which networks are supported?

The network types not supported by the container service CSK include Bridge mode, Host mode and None mode. Bridge mode. Bridge networks are suitable for use in a relatively small network environment of a single host, but it is not suitable for situations where a large network environment is required. Host mode.

Container cloud is an emerging product form in cloud computing technology in the past two years. Container is a lightweight virtualization technology in computing form, and container service is a process-level virtualization form.State encapsulation, rapid start-up and deployment of containers, can be quickly deployed and scheduled according to resource needs at the application level, and the life cycle changes quickly.

Container service cke is a Kubernetes scheduling based on cloud-native applications. Kubernetes (abbreviated as K8s) is an open source system for automated container orchestration, which is designed as an open platform across multiple cloud providers.

Container service provides high-performance scalable container application management services, supports the life cycle management of containerized applications with Docker and Kubernetes, provides a variety of application release methods and continuous delivery capabilities, and supports microservice architecture.

coWhat does ntainer mean?

The translation of container means container. As a noun, it means container and container. Related example sentence: The dockmen are unloading the goods from the container.

CNTR is the usual abbreviation of container in English: container. It is very common in freight forwarding and foreign trade industries. For other abbreviations, you can check the reference materials I provide.

Container (container) The so-called container refers to a large loading container with a certain strength, rigidity and specifications exclusively for turnover. Use containers to transship goodsThe goods can be loaded directly in the shipper's warehouse and transported to the consignee's warehouse for unloading. When changing the car or ship in the middle, there is no need to take the goods out of the box and change them.

shipping container, shipping container, shipping container, cargo carton, shipping container, shipping container shipping: n. Loading; shipping; shipping; shipping; shipping; transportation. Navigation ...container: n. Container, box, box. Container.

container is a layout container in many frameworks, which is mainly used to set the default style, such as the front-end framework bootstrap, the back-end framework layui, etc. This container is used in the project code.

HQ is the abbreviation of High Cubic, which means "high cube".40HQ can also be written as 40HC - that is, 40hige Container - which means 40-foot-high box or high cabinet.

The difference between containers and virtual machines

1. Compared with virtual machines, containers have higher resource utilization efficiency, because it does not need to assign a separate operating system for each application - smaller instance scale, faster creation and migration. It is also faster. This means that a single operating system can carry more containers than a virtual machine.

2. Container: consistency of development, testing and production environment, consistency of local or extranet operation. Virtual machine: Custom mirror image can achieve environmental consistency. Container: Cloud platform or other operating systems, which can be used in Ubuntu, RHEL, CoreOS, on-prem, GoogleContainerEngine or any other environment.

3. The main difference between containers and virtual machines is the location of the virtualization layer and the use of operating system resources. 1 1 Containers and virtual machines have a similar mission: to isolate applications and their relevance, so as to build a set of self-accommodating units that can run anywhere.

4. Compared with virtual machines, docker isolation is weaker. Docker belongs to the isolation between processes, and virtual machines can achieve system-level isolation. Security: The security of docker is also weaker.

How to control the share of system resources (CPU, memory) occupied by the container?

is the mechanism to control the container. Docker controls the resource quota used by the container through Cgroup, including the three aspects of CPU, memory and disk, which basically covers the common resource quota and usage control. It is a mechanism provided by the Linux kernel that can limit, record and isolate the physical resources used by process groups.

By default, the container has no resource limit, and you can use as many given resources as possible allowed by the host kernel scheduler. Docker provides a method to control the container to limit how much memory or CPU the container can use, and set the runtime configuration flag of the docker run command. .

Check the number of memory and CPU usage that the machine has consumed so far through the top command. Enter top under linux, and then enter 1 to see the cpu usage. When docker starts, limit the cpu and memory, --cpus set the number of cpu used. -M The purpose of setting to use memory is not to affect the normal operation of other services.

Docker, as the manager of the container, naturally provides the function of controlling container resources.Just as using the kernel's namespace to isolate containers, Docker also uses the kernel's cgroups to limit the resources of the container.

Restricting the memory use of containers requires the help of the memory cgroup subsystem.

At the same time, the method of configuring memory limits on k8s is also given. Through the following parameters, you can set a memory usage hard size for the container. When this size is exceeded, the Linux system will decide whether to enter the oom-killer state according to the configuration settings.