Start with Docker
Docker is an open source application container engine that allows developers to package their applications and dependencies into a portable container, which can then be distributed to any popular Linux machine, and can also be virtualized. Containers are completely sandboxed and do not have any interface with each other (similar to iPhone apps). There is almost no performance overhead and can be easily run in machines and data centers. Most importantly, they do not depend on any language, framework including system.
Origin of Kubernetes
Kubernetes is Google's open source container cluster management system. It builds on Ddocker technology and provides a complete set of functions such as resource scheduling, deployment and operation, service discovery, expansion and contraction for containerized applications. It can be regarded as a mini-PaaS platform based on container technology in essence.
Features of Kubernetes
Kubernetes is the first innovative product with the guiding ideology of "everything is service-centric and everything revolves around services". Its functions and architecture design follow this guiding ideology from beginning to end, and are built on Kubernetes.
The system can not only run independently on physical machines, virtual machine clusters or enterprise private clouds, but also be hosted in public clouds.
Another highlight of the Kubernetes solution is automation. In the Kubernetes solution, a service can be self-expanding, self-diagnosing, and easy to upgrade. After receiving a service expansion request, Kubernetes will trigger the scheduling process, and finally at the selected target A corresponding number of service instance replicas are started on the node. After these replicas are successfully started, they will be automatically added to the load balancer and take effect. The whole process does not require additional manual operations.
Overview of "The Definitive Guide to Kubernetes - From Docker to Kubernetes Practice"
As can be seen from the catalogue of this book, this book is a sincere work derived from enterprise practice. It contains many examples, and the combination of theory and practice is very good. Many examples are based on experience and can be used directly.
"The Definitive Guide to Kubernetes - From Docker to Kubernetes Practice" Trial Read
The trial reading chapter "Chapter 5 Advanced Kubernetes Cases" starts from the DNS service configuration, first talks about the components of DNS, then introduces their startup and operation methods, and then gives the overall architecture diagram of DNS. Then give Out of the configuration file, readers can actually operate by themselves as long as they make a little modification.
And the author lists each step carefully, including the output information of the console. In this way, readers can follow the author's steps to complete the operation step by step, so as to understand the configuration of DNS.
Finally, the author explained the principle of DNS in simple terms, so that readers not only know what it is, but also know why.
All in all, this book is a rare good book in the hot moment of Docker, and it is worth reading by everyone who wants to make achievements in this field.