What problems does Kubernetes solve in the use of Docker?

Kubernetes is Google's open source container cluster management system, which is the open source version of Google's large-scale container management technology Borg for many years.

(1) Container-based application deployment, maintenance and rolling upgrade

(2) Network, establish communication subnets between containers, such as tunnels, routes, etc., to solve the problem of cross-node communication between containers.

(3) built-in DNS service and kube-proxy for service discovery and load balancing

(4) Resource management, including resource restrictions used by containers, and scheduling containers to the corresponding cluster nodes.

(5) Docker also has the concept of Volume, but it is relatively simple, and the current support is very limited. Kubernetes has a clear definition and extensive support for Volume.

(6) Monitoring the running status of the container

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