1. Docker’s Network Model 1.1 bridge Mode bridge mode is used by default, and you can also specify it with --net=bridge. In bridge mode, containers connect to the same virtual bridge, docker0. docker0 usually occupies the 172.17.0.1/16 subnet. Containers on the same bridge can communicate directly over IP. 1.2 host Mode Use --net=host to specify host mode.

One of the illusions that programmers at big companies easily fall into is mistaking platform capabilities for their own abilities. In a large team, we should not focus only on our own little patch of ground; we need to understand every part of the platform. On one hand, this helps us make better use of the platform’s features; on the other, it helps our own technical growth.

Compiled from the “Development Tips” series, a roundup of common problems and solutions in Docker usage and operations. 1. Basic Docker Machine Commands Create the my-vm-name virtual machine 1 docker-machine create --driver virtualbox my-vm-name List all docker-machine instances 1 2 3 4 docker-machine ls NAME ACTIVE DRIVER STATE URL SWARM

Compiled from the “Development Tips” series, collecting common problems and solutions in CentOS server operations. 1. Upgrading the Docker Version Uninstall the old version of Docker 1 2 3 4 5 6 $yum remove docker \ docker-common \ container-selinux \ docker-selinux \ docker-engine \ docker-engine-selinux Images, containers, data, and networks stored in /var/lib/docker/ are all preserved.

1. Basic Concepts 1.1 Kubernetes Kubernetes (K8s for short), the successor to Google’s Borg, is an open-source system for automatically deploying, scaling, and managing containerized applications. The features it provides: Automated deployment of containers Automated scaling up and down Automated application/service upgrades Grouping containers to serve traffic externally, with load balancing support Health checks for services, with automatic restarts 1.